CN219752626U - Presser foot lifting mechanism of sewing machine and sewing machine - Google Patents
Presser foot lifting mechanism of sewing machine and sewing machine Download PDFInfo
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- CN219752626U CN219752626U CN202321279125.3U CN202321279125U CN219752626U CN 219752626 U CN219752626 U CN 219752626U CN 202321279125 U CN202321279125 U CN 202321279125U CN 219752626 U CN219752626 U CN 219752626U
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- presser foot
- foot lifting
- crank
- sewing machine
- fastening
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- 238000009958 sewing Methods 0.000 title claims abstract description 37
- 238000009434 installation Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 210000003127 knee Anatomy 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- Sewing Machines And Sewing (AREA)
Abstract
The utility model relates to sewing machine equipment and discloses a presser foot lifting mechanism of a sewing machine and the sewing machine, comprising a motor, a presser foot lifting assembly and a presser foot lifting shaft sleeve, wherein a presser foot lifting shaft is arranged in the presser foot lifting shaft sleeve, one end of the presser foot lifting shaft is fastened with a first presser foot lifting crank, and the other end of the presser foot lifting shaft is fastened with a second presser foot lifting crank; the motor is fixedly provided with a third presser foot lifting crank which rotates and drives the first presser foot lifting crank to swing, the second presser foot lifting crank is integrated, the second presser foot lifting crank comprises a second fastening part, a connecting part and a jacking part, one end of the connecting part is connected with the second fastening part, the other end of the connecting part is connected with the jacking part, a groove is formed in the jacking part, and the bottom of the groove is arc-shaped; the oil seal is arranged in the shaft sleeve of the presser foot lifting shaft. The second presser foot lifting crank adopts an integrated design, so that the strength of the second presser foot lifting crank is improved, and the service life of the second presser foot lifting crank is prolonged. The second presser foot lifting crank has low manufacturing cost, reduces assembly procedures and improves the assembly efficiency of the sewing machine.
Description
Technical Field
The utility model relates to sewing machine equipment, in particular to a presser foot lifting mechanism of a sewing machine and the sewing machine.
Background
The presser foot lifting mechanism is an important component part in a sewing machine, the existing presser foot lifting mechanism is mainly used for driving the presser foot to lift or descend by an electromagnet, or the lifting or descending of the presser foot is controlled by propping the knee of a person against the knee, the electromagnet driving has the defects that the height of the presser foot is not adjustable and the noise is relatively large, and the presser foot lifting mechanism is used for lifting the presser foot by propping the knee against the knee, so that the presser foot needs to be lifted with great force, the operation of the sewing machine of a sewing factory is mainly female, and the mode is relatively laborious in practical operation.
Along with the development of the technology, the presser foot lifting mechanism is also driven by a motor, and the driving mode is that the motor drives a crank to swing so as to drive a presser foot lifting assembly to lift, and the existing crank is formed by combining two parts, for example, a thread cutting and presser foot lifting mechanism of a sewing machine with the application number of 202010943991.2, and the structural mode has high manufacturing cost and needs two dies during processing; the assembly efficiency is low, after the accessories are processed, the two accessories are assembled together manually or automatically, so that the assembly process is increased; the strength of the crank is lower, and the two accessories are loose after long-time use, so that the presser foot lifting function is affected.
Disclosure of Invention
The utility model provides a presser foot lifting mechanism of a sewing machine and the sewing machine aiming at the defects in the prior art.
In order to solve the technical problems, the utility model is solved by the following technical scheme:
the presser foot lifting mechanism of the sewing machine comprises a motor, a presser foot lifting assembly and a presser foot lifting shaft sleeve fastened on a machine shell, wherein a presser foot lifting shaft is arranged in the presser foot lifting shaft sleeve, one end of the presser foot lifting shaft is fastened with a first presser foot lifting crank, and the other end of the presser foot lifting shaft is fastened with a second presser foot lifting crank for driving the presser foot lifting assembly; the output shaft of the motor is fixedly provided with a third presser foot lifting crank, the third presser foot lifting crank rotates and drives the first presser foot lifting crank to swing, the second presser foot lifting crank is an integrally formed crank, the second presser foot lifting crank comprises a second fastening part, a connecting part and a jacking part, the connecting part is U-shaped, one end of the connecting part is connected with the second fastening part, the other end of the connecting part is connected with the jacking part, the second fastening part is cylindrical and is fastened on the presser foot lifting shaft through a screw, the jacking part is provided with a groove, and the bottom of the groove is arc-shaped; the oil seal is arranged in the shaft sleeve of the presser foot lifting shaft.
Preferably, the device further comprises a limiting plate fixed on the shell, a notch part for limiting is arranged at the lower end of the jacking part, and the second presser foot lifting crank is limited on the limiting plate through the notch part when in swing.
Preferably, the third presser foot lifting crank is an integrally formed crank, the third presser foot lifting crank comprises a third fastening part and a mounting part, the third fastening part is cylindrical, the mounting part is arranged on the outer circumferential surface of the third fastening part, the third fastening part is sleeved on an output shaft of the motor and is fastened and connected through a screw, a roller is mounted on the mounting part close to one end of the motor, and the roller is mounted on the mounting part through a pin shaft.
Preferably, the first presser foot lifting crank is an integrally formed crank, the first presser foot lifting crank comprises a first fastening part and a rocker arm, the first fastening part is held tightly on the presser foot lifting shaft, a locking notch penetrating through the first fastening part is arranged on the circumferential side wall of the first fastening part, clamping parts are arranged on two sides of the locking notch, the two clamping parts are connected through a fastening screw, one end of the rocker arm is arranged on the circumferential surface of the first fastening part, and the other end of the rocker arm extends to the upper side of the roller and is matched with the roller.
Preferably, the presser foot lifting shaft is sleeved with a gasket, a clamp spring and a torsion spring, the torsion spring is arranged between the gasket and the second fastening part, one end of the torsion spring is propped against the connecting part, the other end of the torsion spring is propped against the shell, and the clamp spring is tightly pressed on the gasket.
Preferably, the presser foot lifting assembly comprises a push rod, and the lower end part of the push rod is placed in a groove of the jacking part.
A sewing machine comprises a presser foot lifting mechanism of the sewing machine.
The utility model has the remarkable technical effects due to the adoption of the technical scheme:
(1) The motor is adopted to independently complete the motion of lifting the presser foot, so that the product cost is reduced, and the electric control program is used for controlling the motor to drive the presser foot to operate in a presser foot lifting mode, so that the workload of personnel is reduced.
(2) The inner end of the presser foot lifting shaft sleeve is sealed through an oil seal, and the presser foot lifting movement mode is realized through the rotation transmission of the presser foot lifting shaft, so that the oil leakage risk is avoided.
(3) The second lifts the presser foot crank and adopts the integral type design, has improved the second and lifted the intensity of presser foot crank, connecting strength is high and be difficult for the rupture between connecting portion and the jack-up portion, has prolonged the second and has lifted presser foot crank life, lifts the presser foot subassembly and can be long-term and smooth and easy by the second lift the presser foot crank drive.
(4) The second presser foot lifting crank integrated design greatly reduces the manufacturing cost of the second presser foot lifting crank integrated design, thereby reducing the whole manufacturing cost of the sewing machine. Meanwhile, an assembly process is reduced, and the assembly efficiency of the sewing machine is improved.
(5) The lower end of the jacking part in the second presser foot lifting crank is provided with a notch part, and the second presser foot lifting crank can be limited on the limiting plate when swinging, so as to restrain the swinging amplitude of the second presser foot lifting crank.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic view of the second presser foot lifting crank of fig. 1 in a first position.
Fig. 3 is a schematic view of the second presser foot lifting crank of fig. 1 in a second position.
Fig. 4 is a schematic view of the third presser foot lifting crank of fig. 1.
Fig. 5 is a schematic view of the structure of the first presser foot lifting crank of fig. 1.
The names of the parts indicated by the numerical reference numerals in the above drawings are as follows:
10-motor
11-shaft sleeve for lifting presser foot
12-foot lifting shaft
13-first presser foot lifting crank, 131-first fastening part, 132-rocker arm, 133-locking notch, 134-clamping part
14-second presser foot lifting crank, 141-second fastening part, 142-connecting part, 143-jacking part, 1431-groove, 1432-notch part
15-third presser foot lifting crank, 151-third fastening part, 152-mounting part, 153-roller
16-limiting plate
17-pad
18-jump ring
19-torsion spring
20-roof bar
Detailed Description
The utility model is described in further detail below with reference to figures 1-5 and examples.
Example 1
The presser foot lifting mechanism of the sewing machine comprises a motor 10, a presser foot lifting assembly and a presser foot lifting shaft sleeve 11 fastened on a machine shell, wherein the motor 10 is a stepping motor or a servo motor, a presser foot lifting shaft 12 is arranged in the presser foot lifting shaft sleeve 11, namely, the presser foot lifting shaft 12 penetrates through an axial hole of the presser foot lifting shaft sleeve 11, one end of the presser foot lifting shaft 12 is fastened with a first presser foot lifting crank 13, and the first presser foot lifting crank 13 is fastened at the end part of the presser foot lifting shaft 12; the other end of the presser foot lifting shaft 12 is fastened with a second presser foot lifting crank 14 for driving the presser foot lifting assembly, the second presser foot lifting crank 14 is fastened on the presser foot lifting shaft 12 through a screw, and the presser foot lifting assembly can be lifted after the second presser foot lifting crank 14 swings, so that the presser foot lifting function of the sewing machine is realized. A third presser foot lifting crank 15 is fixed on the output shaft of the motor 10, the third presser foot lifting crank 15 rotates and drives the first presser foot lifting crank 13 to swing, the first presser foot lifting crank 13 swings and drives the presser foot lifting shaft 12 to rotate, the presser foot lifting shaft 12 rotates and drives the second presser foot lifting crank 14 to swing, and the second presser foot lifting crank 14 swings and drives the presser foot lifting assembly to realize a presser foot lifting function. The second presser foot lifting crank 14 is an integrally formed crank, the second presser foot lifting crank 14 comprises a second fastening part 141, a connecting part 142 and a jacking part 143, the connecting part 142 is U-shaped, one end of the connecting part 142 is connected with the second fastening part 141, the other end of the connecting part is connected with the jacking part 143, the second fastening part 141 is sleeved on the presser foot lifting shaft 12, the second fastening part 141 is cylindrical and is fastened on the presser foot lifting shaft 12 through a screw, a groove 1431 with an upward opening is formed in the jacking part 143, and the bottom of the groove 1431 is arc-shaped; the oil seal is arranged in the presser foot lifting shaft sleeve 11, the inner end of the presser foot lifting shaft sleeve 11 is sealed through the oil seal, and the presser foot lifting movement mode is realized through the rotation transmission of the presser foot lifting shaft 12, so that the oil leakage risk is avoided. The integrated design of the second presser foot lifting crank 14 greatly reduces the manufacturing cost thereof, thereby reducing the overall manufacturing cost of the sewing machine. Meanwhile, an assembly process is reduced, and the assembly efficiency of the sewing machine is improved. The second presser foot lifting crank 14 adopts an integrated design, so that the strength of the second presser foot lifting crank 14 is improved, the connecting strength between the connecting part 142 and the jacking part 143 is high, the second presser foot lifting crank 14 is not easy to break, the service life of the second presser foot lifting crank 14 is prolonged, and the presser foot lifting assembly can be driven by the second presser foot lifting crank 14 smoothly for a long time
The third lifts presser foot crank 15 as integrated into one piece's crank, the third lifts presser foot crank 15 intensity is high, the third lifts presser foot crank 15 includes third fastening portion 151 and installation department 152, third fastening portion 151 is cylindric, installation department 152 is established on the outer periphery of third fastening portion 151, third fastening portion 151 suit is at the output shaft of motor 10 and through screw fastening connection, install gyro wheel 153 on the installation department 152 that is close to motor 10 one end, gyro wheel 153 is installed on installation department 152 through the round pin axle, gyro wheel 153 can be automatic, third lifts presser foot crank 15 rotation can drive first lift presser foot crank through gyro wheel 153 and swing.
The first presser crank 13 that lifts is integrated into one piece's crank, first presser crank 13 intensity that lifts is high, first presser crank 13 that lifts includes first fastening portion 131 and rocking arm 132, first fastening portion 131 is held tightly on lifting presser foot axle 12, be equipped with on the circumference lateral wall of first fastening portion 131 and run through its inside locking breach 133, both sides of locking breach 133 all are equipped with clamping portion 134, connect through fastening screw between two clamping portion 134, when the clearance between two clamping portion 134 reduces, first fastening portion 131 will hold tightly on lifting presser foot axle 12, rocking arm 132 one end is established on the periphery of first fastening portion 131, its other end extends to the top of gyro wheel 153 and cooperates with it.
The presser foot lifting shaft 12 is sleeved with a gasket 17, a clamp spring 18 and a torsion spring 19, the torsion spring 19 is arranged between the gasket 17 and the second fastening part 141, one end of the torsion spring 19 is abutted against the connecting part 142, the other end is abutted against the casing, and the clamp spring 18 is tightly pressed on the gasket 17.
The presser foot lifting assembly includes a push rod 20, the lower end of the push rod 20 being placed in a recess 1431 of the lifting portion 143.
Example 2
Embodiment 2 has substantially the same features as embodiment 1, except that the presser foot lifting mechanism of the sewing machine further includes a limiting plate 16 fixed on the casing, the limiting plate 16 is fastened on the casing by a screw, and the position of the limiting plate 16 can be adjusted, so as to adjust the swing amplitude of the second presser foot lifting crank 14, a notch 1432 for limiting is arranged at the lower end of the jacking portion 143, the second presser foot lifting crank 14 is limited on the limiting plate 16 through the notch 1432 when swinging, and the second presser foot lifting crank 14 is limited on the limiting plate 16 when resetting, so as to ensure the set distance between the second presser foot lifting crank 14 and the presser foot lifting assembly, and ensure that the presser foot lifting assembly can be driven in time.
Example 3
A sewing machine includes the presser foot lifting mechanism of the sewing machine of embodiment 1 or 2.
Claims (7)
1. The presser foot lifting mechanism of the sewing machine comprises a motor (10), a presser foot lifting assembly and a presser foot lifting shaft sleeve (11) fastened on a machine shell, wherein a presser foot lifting shaft (12) is arranged in the presser foot lifting shaft sleeve (11), a first presser foot lifting crank (13) is fastened at one end of the presser foot lifting shaft (12), and a second presser foot lifting crank (14) for driving the presser foot lifting assembly is fastened at the other end of the presser foot lifting shaft (12); a third presser foot lifting crank (15) is fixed on an output shaft of the motor (10), and the third presser foot lifting crank (15) rotates and drives the first presser foot lifting crank (13) to swing, and is characterized in that: the second presser foot lifting crank (14) is an integrally formed crank, the second presser foot lifting crank (14) comprises a second fastening part (141), a connecting part (142) and a jacking part (143), the connecting part (142) is U-shaped, one end of the connecting part (142) is connected with the second fastening part (141), the other end of the connecting part is connected with the jacking part (143), the second fastening part (141) is cylindrical and is fastened on the presser foot lifting shaft (12) through a screw, a groove (1431) is formed in the jacking part (143), and the bottom of the groove (1431) is arc-shaped; the presser foot lifting shaft sleeve (11) is internally provided with an oil seal.
2. The presser foot lifting mechanism of a sewing machine of claim 1, wherein: the novel presser foot lifting crank is characterized by further comprising a limiting plate (16) fixed on the shell, a notch (1432) used for limiting is arranged at the lower end of the jacking part (143), and the second presser foot lifting crank (14) is limited on the limiting plate (16) through the notch (1432) when swinging.
3. The presser foot lifting mechanism of a sewing machine of claim 1, wherein: the third lifts presser foot crank (15) is integrated into one piece's crank, and third lifts presser foot crank (15) include third fastening portion (151) and installation department (152), and third fastening portion (151) are cylindric, and installation department (152) are established on the outer periphery of third fastening portion (151), and third fastening portion (151) suit is at the output shaft of motor (10) and through screw fastening connection, installs gyro wheel (153) on installation department (152) near motor (10) one end, and gyro wheel (153) are installed on installation department (152) through the round pin axle.
4. A presser foot lifting mechanism for a sewing machine as claimed in claim 3, wherein: the first presser foot crank (13) that lifts is integrated into one piece's crank, first presser foot crank (13) that lifts includes first fastening portion (131) and rocking arm (132), first fastening portion (131) are held tightly on lifting presser foot axle (12), be equipped with on the circumference lateral wall of first fastening portion (131) and pass through its inside locking breach (133), both sides of locking breach (133) all are equipped with clamping part (134), connect through fastening screw between two clamping part (134), rocking arm (132) one end is established on the periphery of first fastening portion (131), its other end extends to the top of gyro wheel (153) and cooperates with it.
5. The presser foot lifting mechanism of a sewing machine of claim 1, wherein: the presser foot lifting shaft (12) is sleeved with a gasket (17), a clamp spring (18) and a torsion spring (19), the torsion spring (19) is arranged between the gasket (17) and the second fastening part (141), one end of the torsion spring (19) is abutted against the connecting part (142), the other end of the torsion spring is abutted against the shell, and the clamp spring (18) is tightly pressed on the gasket (17).
6. The presser foot lifting mechanism of a sewing machine of claim 1, wherein: the presser foot lifting assembly comprises a push rod (20), and the lower end part of the push rod (20) is placed in a groove (1431) of the jacking part (143).
7. A sewing machine, characterized in that: a presser foot lifting mechanism comprising the sewing machine of any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321279125.3U CN219752626U (en) | 2023-05-23 | 2023-05-23 | Presser foot lifting mechanism of sewing machine and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321279125.3U CN219752626U (en) | 2023-05-23 | 2023-05-23 | Presser foot lifting mechanism of sewing machine and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219752626U true CN219752626U (en) | 2023-09-26 |
Family
ID=88090277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321279125.3U Active CN219752626U (en) | 2023-05-23 | 2023-05-23 | Presser foot lifting mechanism of sewing machine and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219752626U (en) |
-
2023
- 2023-05-23 CN CN202321279125.3U patent/CN219752626U/en active Active
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