CN216338299U - Presser foot lifting and thread loosening mechanism of single-step sewing machine - Google Patents
Presser foot lifting and thread loosening mechanism of single-step sewing machine Download PDFInfo
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- CN216338299U CN216338299U CN202122415398.3U CN202122415398U CN216338299U CN 216338299 U CN216338299 U CN 216338299U CN 202122415398 U CN202122415398 U CN 202122415398U CN 216338299 U CN216338299 U CN 216338299U
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Abstract
The utility model relates to a single-step sewing machine presser foot lifting and thread loosening mechanism. The sewing machine is controlled by an independent stepping motor, and realizes the functions of trimming, lifting a presser foot, loosening threads and adjusting the needle pitch, and meanwhile realizes the thread loosening function. The technical scheme of the utility model is as follows: the stepping motor enables the presser foot lifting driving shaft to rotate, the presser foot lifting driving shaft is provided with a presser foot lifting crank and a U-shaped frame, one end of the knee-controlled lifting pull rod is arranged in a U-shaped groove of the U-shaped frame and can rotate around the connecting pin, the other end of the knee-controlled lifting pull rod is hinged with one end of the knee-controlled right lever, the other end of the knee-controlled right lever is hinged with one end of the knee-controlled pull plate, the other end of the knee-controlled pull plate is respectively connected with a waist-shaped hole of the driving plate, a waist-shaped through hole of the thread loosening lever and the knee-controlled left lever, the driving pin slides in the waist-shaped hole of the driving plate, the knee-controlled pull plate and the waist-shaped groove of the thread loosening lever, the other end of the driving plate is connected with the knee-controlled left lever, one end of the thread loosening nail is pressed against the circular through hole of the thread loosening lever, the other end of the thread loosening hinge is connected with the thread loosening hinge, and the thread loosening hinge is connected with the thread clamping device.
Description
Technical Field
The utility model relates to the technical field of sewing, in particular to a presser foot lifting and thread loosening mechanism of a single-step sewing machine.
Background
A plurality of motion mechanisms are arranged in the sewing machine, and each mechanism realizes sewing through independent or matched motion.
The existing industrial sewing machine realizes the thread straightening function by adding a thread straightening electromagnet or a stepping motor on the traditional machine, or drives a thread straightening mechanism while cutting threads by other mechanical connection modes.
The novel single-step sewing machine only realizes the integration of functions of trimming, lifting a presser foot and adjusting a needle pitch at present, the thread straightening function still needs to adopt an electromagnet or other driving mechanisms, the change greatly improves the working efficiency of the sewing machine, and the intelligent control of the sewing machine is realized. However, the control difficulty and the internal space of the whole machine are increased by simultaneously using the stepping motor and the electromagnet for control, so that the machine looks heavy, the cost is increased, and a machine with the functions of single-step control of thread trimming, presser foot lifting and thread loosening is not available in the market at present. In view of the above, the present invention provides a presser foot lifting and thread releasing mechanism using a single-step sewing machine.
Disclosure of Invention
In view of the above, the present invention provides a presser foot lifting and thread releasing mechanism of a single step-in sewing machine, which is controlled by an independent stepping motor to realize the functions of thread trimming, presser foot lifting, thread releasing and needle gauge adjustment, and simultaneously realize the thread releasing function.
The technical scheme adopted by the utility model is as follows: a single step-in sewing machine presser foot lifting and thread releasing mechanism comprises a stepping motor, a presser foot lifting driving shaft, a knee control lifting pull rod, a knee control right lever, a driving plate, a knee control left lever, a knee control pull plate, a thread releasing lever and a thread releasing nail;
the thread releasing lever is of an inverted n-shaped structure, a waist-shaped through hole and a step-shaped structure are respectively arranged on the upper transverse edge and the lower transverse edge, a limiting baffle is arranged on the inner side of the middle part of the longitudinal edge, a round through hole is formed in one corner of the thread releasing lever, and the height difference of the step-shaped structure is the thread releasing amount;
the stepping motor enables the presser foot lifting driving shaft to rotate through the synchronous belt, the presser foot lifting driving shaft is provided with a presser foot lifting crank and a U-shaped frame, one end of a knee-control lifting pull rod is arranged in a U-shaped groove of the U-shaped frame through a connecting pin and can rotate around the connecting pin, the other end of the knee-control lifting pull rod is hinged with one end of a knee-control right lever, the other end of the knee-control right lever is hinged with one end of a knee-control pull plate, the other end of the knee-control pull plate is respectively connected with a waist-shaped hole of the driving plate, a waist-shaped through hole of the thread loosening lever and a knee-control left lever through a driving pin, the driving pin slides in the waist-shaped hole of the driving plate, the knee-control pull plate and the waist-shaped groove of the thread loosening lever, the other end of the driving plate is connected with the knee-control left lever, one end of the thread loosening nail is propped in a circular through hole of the thread loosening lever, and the other end of the thread loosening hinge is connected with the thread clamping device.
Further, lift and be equipped with the round hole in the middle of the presser foot crank, both sides are provided with 2 cylinder archs respectively, and a cylinder convex body is used for lifting the presser foot, and opposite side cylinder convex body is used for loosing the line.
Furthermore, one side of the U-shaped frame extends out of the ear structure.
Furthermore, one end of the driving plate is provided with a round hole, and the other end of the driving plate is of a waist groove structure.
Furthermore, the U-shaped frame is sleeved on the presser foot lifting driving shaft and is not fixed with the presser foot lifting driving shaft.
Furthermore, the knee-control right lever is connected with the shell through an axial screw.
Furthermore, the knee control left lever and the thread releasing lever share a shaft position screw and are arranged on the shell and can rotate around the shaft position screw respectively, and the upper part of the knee control left lever is connected with the driving plate through the shaft position screw.
The utility model has the following advantages:
1. the presser foot lifting and loosening function is realized together by using the connecting rod structure and the sliding groove structure, and the structure is simple and convenient;
2. the utility model controls the functions of lifting the presser foot and loosening the thread through the independent stepping motor, thereby greatly reducing the cost of the sewing machine.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the release lever of the present invention;
FIG. 3 is a structure view of a presser foot lifting crank of the present invention;
FIG. 4 is a schematic view of the release lever of the present invention;
FIG. 5 is a schematic view of the connection of the presser foot lifting crank, the U-shaped frame and the knee control lifting pull rod, wherein a is a schematic view of the position of the presser foot lifting crank when the presser foot is lifted; b is a schematic diagram of the position of a crank for lifting the presser foot when the thread is loosened;
FIG. 6 is an operation diagram of the presser foot lifting and releasing mechanism, wherein a is a schematic diagram of a zero position of the presser foot lifting and releasing mechanism; b is a schematic view of the action position of the presser foot lifting and releasing mechanism; c is a schematic view of the thread releasing action position of the thread releasing mechanism of the presser foot lifting and releasing mechanism;
FIG. 7 is a diagram of the action of the loose-thread pin, wherein a is a schematic diagram of the position of the loose-thread pin when the loose-thread pin is not actuated; b is a schematic position diagram of the thread releasing nail during the thread releasing action;
FIG. 8 is a schematic structural view of a U-shaped frame;
FIG. 9 is a schematic structural view of the left half of the inventive structure;
fig. 10 is a top view of the presser foot thread take-up mechanism.
Description of the labeling: 1-stepping motor, 2-synchronous belt, 3-synchronous wheel, 4-presser foot lifting driving shaft, 5-presser foot lifting crank, 6-U-shaped frame, 7-connecting pin, 8-knee control lifting pull rod, 9-knee control right lever, 10-pull rod reset spring, 11-driving plate, 12-driving pin, 13-knee control left lever, 14-knee control pull plate, 15-thread releasing lever, 16-axis screw, 17-limit screw, 18-thread releasing nail, 19-thread releasing hinge, 20-thread gripper and 21-tension spring.
5-1, a first cylindrical bulge, 5-2 and a second cylindrical bulge;
15-1 parts of waist-shaped through holes, 15-2 parts of limiting baffles, 15-3 parts of step-shaped structures.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The utility model provides a single-step presser foot lifting and releasing mechanism of a sewing machine, which comprises a stepping motor 1, a synchronous wheel 3, a synchronous belt 2, a presser foot lifting driving shaft 4, a presser foot lifting crank 5, a connecting frame 6, a connecting pin 7, a knee control lifting pull rod 8, a knee control right lever 9, a pull rod resetting spring 10, a driving plate 11, a driving pin 12, a knee control left lever 13, a knee control pull plate 14, a releasing lever 15, a shaft position screw 16, a limit screw 17, a releasing screw 18, a releasing hinge 19, a thread clamping device 20 and a tension spring 21, as shown in figures 1 and 9.
As shown in figure 2, the thread releasing lever 15 is of an inverted n-shaped structure, a waist-shaped through hole 15-1 and a step-shaped structure 15-3 are respectively arranged on the upper transverse edge and the lower transverse edge, a limiting baffle 15-2 is arranged on the inner side of the middle of the longitudinal edge, a tension spring 21 is arranged on the limiting baffle 15-2, the other end of the tension spring 21 is arranged on the machine shell, the thread releasing lever 15 is pulled rightwards to abut against a limiting screw 17, the thread releasing lever 15 is ensured to be fixed when the presser foot is lifted, the limiting screw 17 is arranged on the machine shell and used for limiting the thread releasing lever 15 to move rightwards, a round through hole is arranged at one corner of the thread releasing lever 15, and the height difference of the step-shaped structure is the thread releasing amount.
A synchronous wheel is sleeved on the stepping motor 1, a synchronous wheel is sleeved on one end of the presser foot lifting driving shaft, a synchronous belt is sleeved between the two synchronous wheels, the stepping motor 1 enables the presser foot lifting driving shaft 4 to rotate through the synchronous belt 2, a presser foot lifting crank 5 and a U-shaped frame 6 are arranged on the presser foot lifting driving shaft 4, the U-shaped frame 6 is sleeved on the presser foot lifting driving shaft 4 and is not fixed, therefore, the U-shaped frame 6 can rotate around the presser foot lifting driving shaft 4, and one side of the U-shaped frame 6 extends out of an ear structure; one end of the knee-control lifting pull rod 8 is arranged in a U-shaped groove of the U-shaped frame 6 through a connecting pin 7 and can rotate around the connecting pin 7, the other end of the knee-control lifting pull rod 8 is hinged with one end of the knee-control right lever 9, the other end of the knee-control right lever 9 is hinged with one end of a knee-control pull plate 14, the other end of the knee-control pull plate 14 is respectively connected with a waist-shaped hole of the driving plate 11 and a waist-shaped through hole 15-1 of the thread releasing lever 15 through a driving pin 12, the driving pin 12 slides in the waist-shaped hole of the driving plate 11, the knee-control pull plate 14 and the waist-shaped groove of the thread releasing lever 15, the other end of the driving plate 11 is connected with the knee-control left lever 13, one end of the thread releasing nail 18 is propped in a circular through hole of the thread releasing lever 15, the other end of the thread releasing nail is connected with a thread releasing hinge 19, and the thread releasing hinge 19 is connected with a thread clamp 20.
As shown in fig. 3, a circular hole is formed in the middle of the presser foot lifting crank 5, 2 cylindrical protrusions, namely a cylindrical protrusion one 5-1 and a cylindrical protrusion two 5-2, are respectively arranged on two sides of the presser foot lifting crank, one cylindrical protrusion is used for lifting the presser foot, and the other cylindrical protrusion is used for loosening threads.
One end of the driving plate 11 is provided with a round hole, the other end of the driving plate is of a waist groove structure, and the driving plate 11 is connected with the knee control left lever 13 through the round hole.
The knee-control right lever 9 of the utility model is connected with a shell through an axial screw, the knee-control left lever 13 and a thread releasing lever 15 share the axial screw and are arranged on the shell and can respectively rotate around the axial screw, and the upper part of the knee-control left lever 13 is connected with a driving plate 11 through the axial screw.
One end of the pressure foot lifting driving shaft 4 is a pressure foot lifting end, and the other end is a wire loosening end.
The said thread releasing pin 18 abuts against the lower step of the thread releasing lever 15 when not actuated.
The loose wire hinge 19 is always abutted against the knee control left lever 13 under the action of the reset torsion spring.
The working process of the utility model is shown in figures 4-7 and figure 10:
when the presser foot is lifted by the sewing machine, the stepping motor rotates anticlockwise, the presser foot driving shaft 4 rotates anticlockwise under the driving of the synchronous belt 2 and the synchronous wheel 3, the presser foot crank 5 rotates anticlockwise simultaneously, the presser foot lifting end on the presser foot crank 5 drives the U-shaped frame 6 to rotate downwards, the U-shaped frame 6 is connected with the knee control lifting pull rod 8 through the connecting pin 7 to drive the knee control lifting pull rod to move downwards, and the knee control lifting pull rod 8 drives the knee control right lever 9 to rotate rightwards and pulls the knee control pull plate 14 to move rightwards. At the moment, because the driving pin 12 is positioned at the rightmost end of the waist groove of the driving plate 11 and the leftmost end of the waist groove of the thread releasing lever 15, when the knee-control pulling plate 14 moves rightwards, the driving plate 11 is driven to move rightwards, and meanwhile, the knee-control left lever 13 is driven to rotate rightwards, so that the presser foot is lifted; when the driving pin 12 moves rightwards, the thread releasing lever 15 keeps still under the action of the limit screw 17 fixedly connected with the machine shell, the driving pin 12 slides in the waist groove on the thread releasing lever 15, and meanwhile, the knee control left lever 13 can push the knee control hinge 19 to rotate rightwards when rotating rightwards, so that the thread releasing function when lifting the presser foot is realized.
After the presser foot lifting action is finished, the knee-controlled lifting pull rod 8 returns to the initial position under the action of the presser foot spring and the pull rod return spring 10.
When the sewing machine performs the thread cutting action, the thread loosening action is required to be performed at the same time; the stepping motor 1 rotates clockwise, the presser foot lifting driving shaft 4 rotates clockwise through the driving of the synchronous belt 3 and the synchronous wheel 2, and the presser foot lifting driving shaft 4 rotates clockwise simultaneously.
The end loosening end on the presser foot lifting crank 5 drives the U-shaped frame 6 to rotate upwards and drives the knee-controlled pulling plate 14 to move upwards, and the knee-controlled lifting pulling rod 8 drives the knee-controlled right lever 9 to rotate leftwards and pushes the knee-controlled pulling plate 14 to move leftwards. At this time, because the driving pin 12 is located at the rightmost end of the waist groove of the driving plate 11 and the leftmost end of the waist groove of the thread releasing lever 15, when the knee control pulling plate 14 moves leftwards, the thread releasing lever 15 is pushed to rotate leftwards, the thread releasing step structure 15-2 on the thread releasing lever 15 can jack up the thread releasing nail 18, the thread releasing function during thread trimming is achieved, and in the moving process, the driving pin 12 slides leftwards in the waist groove of the driving plate 11, so that the pressing foot cannot be affected.
After the thread cutting action is finished, the thread releasing lever 15 returns to the initial position under the action of the tension spring 21.
The utility model is not limited to the examples, and any equivalent changes to the technical solution of the utility model by a person skilled in the art after reading the description of the utility model are covered by the claims of the utility model.
Claims (7)
1. A single step-in sewing machine lifts presser foot thread releasing mechanism which characterized in that: the device comprises a stepping motor (1), a presser foot lifting drive shaft (4), a knee control lifting pull rod (8), a knee control right lever (9), a drive plate (11), a knee control left lever (13), a knee control pull plate (14), a thread releasing lever (15) and a thread releasing nail (18);
the thread releasing lever (15) is of an inverted n-shaped structure, a waist-shaped through hole (15-1) and a step-shaped structure (15-3) are respectively arranged on the upper transverse edge and the lower transverse edge, a limiting baffle (15-2) is arranged on the inner side of the middle part of the longitudinal edge, a circular through hole is arranged at one corner of the thread releasing lever (15), and the height difference of the step-shaped structure is the thread releasing amount;
the stepping motor (1) enables the presser foot lifting drive shaft (4) to rotate through the synchronous belt (2), the presser foot lifting drive shaft (4) is provided with a presser foot lifting crank (5) and a U-shaped frame (6), one end of the knee-controlled lifting pull rod (8) is arranged in a U-shaped groove of the U-shaped frame (6) through the connecting pin (7) and can rotate around the connecting pin (7), the other end of the knee-controlled lifting pull rod (8) is hinged with one end of the knee-controlled right lever (9), the other end of the knee-controlled right lever (9) is hinged with one end of the knee-controlled pull plate (14), the other end of the knee-controlled pull plate (14) is respectively connected with a waist-shaped hole of the drive plate (11), a waist-shaped through hole (15-1) of the thread releasing lever (15) and the knee-controlled left lever (13) through the drive pin (12), the drive pin (12) slides in the waist-shaped hole of the drive plate (11), the knee-controlled pull plate (14) and the waist-shaped groove of the thread releasing lever (15), the other end of the driving plate (11) is connected with the knee control left lever (13), one end of the thread releasing nail (18) is propped in the circular through hole of the thread releasing lever (15), the other end of the thread releasing nail is connected with a thread releasing hinge (19), and the thread releasing hinge (19) is connected with a thread clamping device (20).
2. The single step sewing machine presser foot and thread take-up mechanism of claim 1, wherein: the middle of the presser foot lifting crank (5) is provided with a round hole, two sides of the presser foot lifting crank are respectively provided with 2 cylindrical protrusions, one cylindrical protrusion is used for lifting the presser foot, and the other cylindrical protrusion is used for loosening the thread.
3. A single step sewing machine presser foot and thread take-up mechanism according to claim 1 or 2, wherein: one side of the U-shaped frame (6) extends out of the ear structure.
4. A single step sewing machine presser foot and thread take-up mechanism as claimed in claim 3, wherein: one end of the driving plate (11) is provided with a round hole, and the other end of the driving plate is of a waist groove structure.
5. The single step sewing machine presser foot and thread take-up mechanism of claim 4, wherein: the U-shaped frame (6) is sleeved on the presser foot lifting driving shaft (4) and is not fixed with the presser foot lifting driving shaft (4).
6. The single step sewing machine presser foot and thread take-up mechanism of claim 5, wherein: the knee control right lever (9) is connected with the machine shell through a shaft position screw.
7. The single step sewing machine presser foot and thread take-up mechanism of claim 6, wherein: the common axis position screw of the knee control left lever (13) and the thread releasing lever (15) is arranged on the shell and can rotate around the axis position screw respectively, and the upper part of the knee control left lever (13) is connected with the driving plate (11) through the axis position screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122415398.3U CN216338299U (en) | 2021-10-08 | 2021-10-08 | Presser foot lifting and thread loosening mechanism of single-step sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122415398.3U CN216338299U (en) | 2021-10-08 | 2021-10-08 | Presser foot lifting and thread loosening mechanism of single-step sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216338299U true CN216338299U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122415398.3U Active CN216338299U (en) | 2021-10-08 | 2021-10-08 | Presser foot lifting and thread loosening mechanism of single-step sewing machine |
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| Country | Link |
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| CN (1) | CN216338299U (en) |
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2021
- 2021-10-08 CN CN202122415398.3U patent/CN216338299U/en active Active
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