CN209907000U - Automatic lift presser foot structure and sewing machine - Google Patents
Automatic lift presser foot structure and sewing machine Download PDFInfo
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- CN209907000U CN209907000U CN201920237144.7U CN201920237144U CN209907000U CN 209907000 U CN209907000 U CN 209907000U CN 201920237144 U CN201920237144 U CN 201920237144U CN 209907000 U CN209907000 U CN 209907000U
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- presser foot
- foot lifting
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- roller
- lifting
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Abstract
The utility model belongs to the technical field of sewing equipment, in particular to an automatic presser foot lifting structure and a sewing machine; the device comprises a motor and a presser foot lifting assembly, wherein a presser foot lifting cam is arranged on a rotating shaft of the motor, the presser foot lifting cam is connected with the presser foot lifting assembly through a roller, and the roller rolls along the outer cylindrical surface of the presser foot lifting cam; the pressure foot lifting cam is provided with an equal-diameter part and a reducing part, the center distance is unchanged when the roller rolls on the equal-diameter part, and the pressure foot lifting assembly does not act; when the roller rolls on the diameter-variable part, the center distance changes to drive the pressure lifting and pressing foot assembly to act. The utility model discloses a gyro wheel rolls along lifting presser foot cam and realizes lifting the presser foot action with ejector pin jack-up, and the transmission is steady, and stability is high, and the noise is little, has improved sewing machine's whole quality.
Description
The technical field is as follows:
the utility model belongs to the technical field of make up equipment, refer in particular to an automatic lift presser foot structure and sewing machine.
Background art:
the action of a presser foot lifting mechanism on the traditional lockstitch sewing machine can be driven by two modes, one mode is knee control presser foot lifting, and the other mode is electromagnet drive presser foot lifting. For example, the chinese utility model patent with the publication number CN 204959251U discloses a presser foot lifting device of a sewing machine, which includes the above two driving modes. The knee-controlled presser foot lifting device has the defect of high noise.
In order to simplify the structure later, the chinese patent application with application publication No. CN 106948096 a discloses a thread trimming and presser foot lifting device of a sewing machine and the sewing machine. The presser foot lifting crank assembly in the thread trimming presser foot lifting device comprises a presser foot lifting crank, wherein the presser foot lifting crank is provided with a butting part, and the butting part is butted with a mandril of a presser foot lifting mechanism. The presser foot lifting device drives the ejector rod to jack up by the contact connection of the abutting part and the ejector rod, and noise is generated between the abutting part and the ejector rod due to impact.
The invention content is as follows:
the utility model aims at providing a presser foot structure and sewing machine are lifted in automation that the noise is low, the transmission is steady.
The utility model discloses a realize like this:
the utility model provides a lift presser foot mechanism certainly, includes the motor, lifts the presser foot subassembly, its characterized in that: a pressure foot lifting cam is arranged on a rotating shaft of the motor, the pressure foot lifting cam is connected with the pressure foot lifting assembly through a roller, and the roller rolls along the outer cylindrical surface of the pressure foot lifting cam; the pressure foot lifting cam is provided with an equal-diameter part and a reducing part, the center distance is unchanged when the roller rolls on the equal-diameter part, and the pressure foot lifting assembly does not act; when the roller rolls on the diameter-variable part, the center distance changes to drive the pressure lifting and pressing foot assembly to act.
In the above automatic presser foot lifting structure, the presser foot lifting assembly comprises a presser foot lifting connecting rod and a presser foot lifting crank, one end of the presser foot lifting crank is fixedly arranged on the feeding shaft, the other end of the presser foot lifting crank is provided with a push rod pin, the push rod pin is connected with one end of a rear presser foot lifting lever through a push rod, the middle part of the rear presser foot lifting lever is hinged on the casing, the other end of the rear presser foot lifting lever is connected with a front presser foot lifting lever through a pull rod, the front presser foot lifting lever is rotatably connected on the casing through a front lever pin, the front presser foot lifting lever is connected with a presser foot lifting plate, the presser foot lifting plate is connected with a pressure rod guide frame, and the pressure rod guide frame is; one end of the pressure foot lifting connecting rod is arranged on the feeding shaft, and the other end of the pressure foot lifting connecting rod is connected with the roller.
In the above automatic presser foot lifting structure, one end of the presser foot lifting crank is a shaft sleeve portion, the shaft sleeve portion is sleeved on the feeding shaft, one end of the presser foot lifting connecting rod is sleeved on the shaft sleeve portion, and the presser foot lifting crank and the presser foot lifting connecting rod synchronously rotate around the axis of the feeding shaft.
In the above-mentioned automatic presser foot lifting structure, the motor is fixed on the chassis base plate through the motor bracket.
In the above-mentioned automatic presser foot lifting structure, the presser foot lifting cam includes a mounting sleeve portion and a cam portion, the cam portion is kidney-shaped, the mounting sleeve portion is located at one end of the constant diameter portion of the cam portion, the presser foot lifting cam is connected to the rotating shaft of the motor through the mounting sleeve portion, and the mounting sleeve portion is fixedly connected to the rotating shaft of the motor.
In the above automatic presser foot lifting structure, the roller is connected to the other end of the presser foot lifting connecting rod through a roller pin, and the roller can roll around the roller pin.
Another object of the present invention is to provide a sewing machine, which includes the above-mentioned automatic presser foot lifting structure.
Compared with the prior art, the utility model outstanding advantage is:
the utility model discloses a gyro wheel rolls along lifting presser foot cam and realizes lifting the presser foot action with ejector pin jack-up, and the transmission is steady, and stability is high, and the noise is little, has improved sewing machine's whole quality.
Description of the drawings:
fig. 1 is one of the schematic perspective views of the present invention;
fig. 2 is a second perspective view of the present invention;
fig. 3 is a third perspective view of the present invention;
FIG. 4 is a right side view of the present invention, wherein the broken line arrow indicates the direction of lifting the presser foot;
fig. 5 is a schematic view of the presser foot lifting cam of the present invention.
In the figure: 1. a motor; 2. a motor bracket; 3. a rotating shaft; 4. lifting a presser foot cam; 5. a roller; 6. an equal diameter part; 7. a diameter-variable part; 8. lifting a presser foot connecting rod; 9. lifting a presser foot crank; 10. a feed shaft; 11. a knock-pin; 12. a top rod; 13. lifting a rear lever of the presser foot; 14. a pull rod; 15. lifting a presser foot front lever; 16. a front lever pin; 17. a presser foot lifting plate; 18. a compression bar guide frame; 19. a presser foot shaft; 20. a roller pin; 21. a boss portion; 22. a strip-shaped hole; 23. a mounting sleeve part; 24. a cam portion.
The specific implementation mode is as follows:
the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 5:
an automatic presser foot lifting structure comprises a motor 1 and a presser foot lifting assembly, wherein the motor 1 is fixed on a bottom plate of a machine shell through a motor support 2. The motor 1 is a stepping motor or a raster motor, and the stepping motor is preferred in the embodiment. A presser foot lifting cam 4 is arranged on a rotating shaft 3 of the motor, the presser foot lifting cam 4 is connected with the presser foot lifting assembly through a roller 5, and the roller 5 rolls along the outer cylindrical surface of the presser foot lifting cam 4; the pressure foot lifting cam 4 is provided with an equal-diameter part 6 and a reducing part 7 (as shown in fig. 5, for convenience of distinction, the dotted line part in the figure represents the reducing part 7, the solid line part represents the equal-diameter part 6, and the dotted line has no other meaning), when the roller 5 rolls on the equal-diameter part 6, the center distance is not changed, and the pressure foot lifting assembly does not act; when the roller 5 rolls on the reducing part 7, the center distance changes to drive the pressure foot lifting assembly to act. Gyro wheel 5 can replace with the bearing, require to roll in a flexible way.
The utility model discloses a gyro wheel is lifting 4 rolls of presser foot cam along 5 and is realizing lifting the presser foot action, and stability is high, and the transmission is steady, can not appear the card pause or pause phenomenon, has stopped the noise that produces because of the striking between the part, has effectively improved sewing machine's whole quality.
Further, the presser foot lifting assembly comprises a presser foot lifting connecting rod 8 and a presser foot lifting crank 9, one end of the presser foot lifting crank 9 is fixedly arranged on the feeding shaft 10, the other end of the presser foot lifting crank 9 is provided with a push rod pin 11, the axis of the push rod pin 11 is parallel to the feeding shaft 10, the push rod pin 11 is connected with one end of a presser foot lifting rear lever 13 through a push rod 12, the middle part of the presser foot lifting rear lever 13 is hinged on the machine shell, the other end of the presser foot lifting rear lever 13 is connected with a presser foot lifting front lever 15 through a pull rod 14, the presser foot lifting front lever 15 is rotatably connected on the machine shell through a front lever pin 16, the presser foot lifting front lever 15 is connected with a presser foot lifting plate 17, the presser foot lifting plate 17 is connected with a pressing rod guide frame 18, and the pressing; one end of the pressure foot lifting connecting rod 8 is arranged on the feeding shaft 10, and the other end of the pressure foot lifting connecting rod is connected with the roller 5 through the pressure foot lifting connecting rod.
The roller 5 is connected with the other end of the pressure foot lifting connecting rod 8 through a roller pin 20, and the roller 8 can roll around the roller pin 20. The roller pin 20 may be an axial screw or a structure in which a clip spring for limiting the position of the roller is provided at both ends of the pin.
Further, one end of the presser foot lifting crank 9 is a shaft sleeve portion 21, the shaft sleeve portion 21 is sleeved on the feeding shaft 10, one end of the presser foot lifting connecting rod 8 is sleeved on the shaft sleeve portion 21, and the presser foot lifting crank 9 and the presser foot lifting connecting rod 8 synchronously rotate around the axis of the feeding shaft 10.
For the convenience of installation, a strip-shaped hole 22 is formed in the motor support 2, so that the position of the motor 1 in the axial direction of the feeding shaft 10 can be conveniently adjusted.
Further, the presser foot lifting cam 4 of the present invention includes a mounting sleeve portion 23 and a cam portion 24, the cam portion 24 is waist-shaped, the mounting sleeve portion 23 is located at one end of the equal diameter portion 6 of the cam portion 24, and the mounting sleeve portion 23 is collinear with the axis of the equal diameter portion 6. The pressure raising and pressing foot cam 4 is connected to the rotating shaft 2 of the motor 1 through a mounting sleeve part 23, and the mounting sleeve part 23 is fixedly connected with the rotating shaft 2 of the motor 1. The mounting sleeve portion 23 is fixedly connected with the rotating shaft 2 of the motor 1 through screws radially arranged on the mounting sleeve portion 23 or through threads.
The utility model discloses a theory of operation:
the motor 1 operates according to the presser foot lifting direction to drive the presser foot lifting cam 4, when the roller 5 rolls on the diameter changing part 7, the presser foot lifting connecting rod 8 and the presser foot lifting crank 9 move along with the roller, so that the ejector rod 12 rises upwards, and the follow-up parts change along with the movement of finally realizing the presser foot lifting. When the roller 5 rolls on the equal diameter part 6, the pressure foot lifting component does not act.
Another object of the utility model is to provide a sewing machine, its characterized in that: the automatic presser foot lifting structure comprises the automatic presser foot lifting structure.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.
Claims (7)
1. The utility model provides an automatic lift presser foot structure, includes motor (1), lifts the presser foot subassembly, its characterized in that: a presser foot lifting cam (4) is arranged on a rotating shaft (3) of the motor (1), the presser foot lifting cam (4) is connected with the presser foot lifting assembly through a roller (5), and the roller (5) rolls along the outer cylindrical surface of the presser foot lifting cam (4); the pressure foot lifting cam is provided with an equal-diameter part (6) and a variable-diameter part (7), the center distance is unchanged when the roller (5) rolls on the equal-diameter part, and the pressure foot lifting assembly does not act; when the roller (5) rolls on the diameter-variable part (7), the center distance changes to drive the pressure foot lifting component to act.
2. The automatic presser foot lifting structure of claim 1, wherein: the presser foot lifting assembly comprises a presser foot lifting connecting rod (8) and a presser foot lifting crank (9), one end of the presser foot lifting crank (9) is fixedly arranged on the feeding shaft (10), the other end of the presser foot lifting crank is provided with a push rod pin (11), the push rod pin (11) is connected with one end of a presser foot lifting rear lever (13) through a push rod (12), the middle part of the presser foot lifting rear lever (13) is hinged on the machine shell, the other end of the presser foot lifting rear lever (13) is connected with a presser foot lifting front lever (15) through a pull rod (14), the presser foot lifting front lever (15) is rotatably connected on the machine shell through a front lever pin (16), the presser foot lifting front lever (15) is connected with a presser foot lifting plate (17), the presser foot lifting plate (17) is connected with a presser foot guide frame (18), and the presser foot guide frame (18) is fixedly arranged on a presser; one end of the pressure foot lifting connecting rod (8) is arranged on the feeding shaft (10), and the other end of the pressure foot lifting connecting rod is connected with the roller (5).
3. The automatic presser foot lifting structure of claim 2, wherein: one end of the presser foot lifting crank (9) is a shaft sleeve part (21), the shaft sleeve part (21) is sleeved on the feeding shaft (10), one end of the presser foot lifting connecting rod (8) is sleeved on the shaft sleeve part (21), and the presser foot lifting crank (9) and the presser foot lifting connecting rod (8) synchronously rotate around the axis of the feeding shaft (10).
4. The automatic presser foot lifting structure of claim 1, wherein: the motor (1) is fixed on the bottom plate of the machine shell through the motor bracket (2).
5. The automatic presser foot lifting structure of claim 1, wherein: the presser foot lifting cam (4) comprises an installation sleeve part (23) and a cam part (24), the cam part (24) is waist-shaped, the installation sleeve part (23) is positioned at one end of an equal-diameter part (6) of the cam part (24), the presser foot lifting cam (4) is connected to a rotating shaft (3) of the motor (1) through the installation sleeve part (23), and the installation sleeve part (23) is fixedly connected with the rotating shaft (3) of the motor (1).
6. The automatic presser foot lifting structure of claim 2, wherein: the roller (5) is connected with the other end of the pressure foot lifting connecting rod (8) through a roller pin (20), and the roller (5) can roll around the roller pin (20).
7. A sewing machine characterized by: including an automatic presser foot lifting arrangement as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237144.7U CN209907000U (en) | 2019-02-23 | 2019-02-23 | Automatic lift presser foot structure and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237144.7U CN209907000U (en) | 2019-02-23 | 2019-02-23 | Automatic lift presser foot structure and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209907000U true CN209907000U (en) | 2020-01-07 |
Family
ID=69030860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920237144.7U Active CN209907000U (en) | 2019-02-23 | 2019-02-23 | Automatic lift presser foot structure and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209907000U (en) |
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2019
- 2019-02-23 CN CN201920237144.7U patent/CN209907000U/en active Active
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