CN211498054U - Presser foot lifting mechanism of sewing machine - Google Patents
Presser foot lifting mechanism of sewing machine Download PDFInfo
- Publication number
- CN211498054U CN211498054U CN201922500647.1U CN201922500647U CN211498054U CN 211498054 U CN211498054 U CN 211498054U CN 201922500647 U CN201922500647 U CN 201922500647U CN 211498054 U CN211498054 U CN 211498054U
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- presser foot
- foot lifting
- sewing machine
- output shaft
- crank
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Abstract
The utility model belongs to the technical field of sewing machine, in particular to sewing machine lift presser foot mechanism, include the biax step motor as the power supply, be connected with thread trimming mechanism on the thread trimming output shaft of step motor one end, what the other end lifted and be connected with on the presser foot output shaft and lift presser foot mechanism, lifting and being provided with on the presser foot output shaft and lifting the presser foot crank, lifting and being provided with the pitch arc recess on the presser foot crank, antifriction bearing in the pitch arc recess with lift presser foot transmission articulate one end articulated, lift presser foot transmission crank and connect gradually and lift presser foot axle, transmission connecting rod, ejector pin, back lever, lift presser foot connecting rod, preceding lever, presser foot lifter plate, depression bar guide, depression bar and presser foot. The utility model provides a sewing machine lift presser foot mechanism has saved sewing machine's inner space, has reduced sewing machine's manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of sewing machine, in particular to sewing machine lift presser foot mechanism.
Background
In the existing sewing machine, the thread cutting mechanism and the presser foot lifting mechanism are both necessary components, and during work, the thread cutting mechanism and the presser foot lifting mechanism are respectively driven by separate motors. The defects of the sewing machine are that the internal space of the sewing machine is wasted, and the synchronism of the thread cutting operation and the presser foot lifting operation is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sewing machine lift presser foot mechanism has saved sewing machine's inner space, has reduced sewing machine's manufacturing cost.
The purpose of the utility model is realized like this:
a presser foot lifting mechanism of a sewing machine comprises a double-shaft stepping motor as a power source, wherein a thread cutting mechanism is connected onto a thread cutting output shaft at one end of the stepping motor, a presser foot lifting mechanism is connected onto a presser foot lifting output shaft at the other end of the stepping motor, a presser foot lifting crank is arranged on the presser foot lifting output shaft, an arc groove is arranged on the presser foot lifting crank, a rolling bearing in the arc groove is hinged with one end of a presser foot lifting transmission crank, the other end of the presser foot lifting transmission crank is connected with the presser foot lifting shaft, a transmission connecting rod is fixedly connected onto the presser foot lifting shaft, the other end of the transmission connecting rod is hinged with one end of a push rod, the other end of the push rod is hinged with one end of a rear lever, the other end of the rear lever is hinged with one end of a front lever through the presser foot lifting connecting rod, the other end of a presser foot lifting plate, the tail end of the pressure lever is provided with a pressure foot.
The ejector rod and the pressure foot lifting output shaft are perpendicular and vertically arranged upwards, the pressure rod and the pressure foot lifting output shaft are perpendicular and vertically arranged downwards, and the ejector rod and the pressure rod are respectively positioned on two sides of the stepping motor.
The pressure foot lifting connecting rods are positioned right above the stepping motor and are transversely distributed.
The outer side of the front lever is provided with a cam, the cam is fixedly connected with a presser foot wrench, the cam and the presser foot wrench are used for manually lifting the presser foot, and correspondingly, a free stroke allowance is reserved between the rolling bearing and the arc groove, so that the requirement for manually lifting the required movable range of the presser foot can be met.
The pressure foot lifting output shaft on the inner side of the pressure foot lifting crank is sleeved with a magnetic inductor, and one side of the magnetic inductor is provided with an inductor housing.
The two ends of the stepping motor are provided with motor connecting plates, each motor connecting plate comprises a motor connecting portion and a machine shell connecting portion, bolt through holes are formed in the motor connecting portions and the machine shell connecting portions, the motor connecting portions are connected with the end face of the stepping motor in a fastening mode, and the machine shell connecting portions are connected with the machine shell of the sewing machine in a fastening mode.
The motor connecting part and the shell connecting part are vertically arranged, the motor connecting part is square, and the edge of the motor connecting part and the plane of the shell connecting part form an included angle of 45 degrees.
The fastening connection mode and the hinge mode of each component are all in a mode known in the art, for example, the fastening connection mode adopts screw fastening, and the hinge mode adopts pin hinge.
The thread cutting mechanism can adopt thread cutting structures of various sewing machines.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model discloses a biax step motor is as the power supply, and presser foot mechanism is lifted in the one end drive thread trimming mechanism, one end drive, has saved sewing machine's inner space, has reduced sewing machine's manufacturing cost. And simultaneously, the thread cutting operation and the presser foot lifting operation have better cooperativity.
Drawings
Fig. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a partial exploded view of the present invention;
Detailed Description
The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which figures 1 to 3:
a presser foot lifting mechanism of a sewing machine comprises a double-shaft stepping motor 1 as a power source, a thread cutting mechanism is connected on a thread cutting output shaft 2 at one end of the stepping motor 1, a presser foot lifting mechanism is connected on a presser foot lifting output shaft 3 at the other end, a presser foot lifting crank 4 is arranged on the presser foot lifting output shaft 3, an arc groove 5 is arranged on the presser foot lifting crank 4, a rolling bearing 6 in the arc groove 5 is hinged with one end of a presser foot lifting transmission crank 7, the other end of the presser foot lifting transmission crank 7 is connected with a presser foot lifting shaft 8, a transmission connecting rod 9 is fixedly connected on the presser foot lifting shaft 8, the other end of the transmission connecting rod 9 is hinged with one end of a mandril 10, the other end of the mandril 10 is hinged with one end of a rear lever 11, the other end of the rear lever 11 is hinged with one end of a front lever 13 through the presser foot lifting connecting rod 12, the other end of the presser foot lifting plate 14 is in transmission connection with a pressure lever guide frame 15, a pressure lever 16 is fixed on the pressure lever guide frame 15, and a presser foot 17 is arranged at the tail end of the pressure lever 16.
The utility model discloses a working method is: the double-shaft stepping motor 1 simultaneously drives the thread trimming mechanism and the presser foot lifting mechanism to work, the presser foot lifting mechanism works in a mode that the stepping motor 1 rotates in the forward direction to drive the presser foot lifting crank 4 to rotate so as to drive the rolling bearing 6 placed in the arc groove 5 of the presser foot lifting mechanism, the presser foot lifting transmission crank 7 is driven to swing up and down after the rolling bearing 6 starts to move, the ejector rod 10 is driven to move up and down through the presser foot lifting shaft 8 and the transmission connecting rod 9, the ejector rod 10 generates force to push the rear lever 11 connected with the ejector rod, the presser foot lifting connecting rod 12 is pulled after the rear lever 11 moves, the direction of the force is changed through the front lever 13, the presser foot lifting plate 14 connected with the ejector rod is pulled to move up, force is generated through the pressing rod guide frame 15, the pressing rod 16 is pulled. When the presser foot lifting action is completed, the stepping motor 1 rotates reversely to return, the presser foot lifting crank 4 connected to the presser foot lifting output shaft 3 of the stepping motor 1 also moves, and therefore the rolling bearing 6 can forcibly return to the position where the presser foot lifting action is not performed along the arc-shaped groove 5 in the presser foot lifting crank 4.
The ejector rod 10 is perpendicular to the pressure foot lifting output shaft 3 and is vertically arranged upwards, the press rod 16 is perpendicular to the pressure foot lifting output shaft 3 and is vertically arranged downwards, and the ejector rod 10 and the press rod 16 are respectively positioned on two sides of the stepping motor 1.
The presser foot lifting connecting rods 12 are located right above the stepping motor 1 and are distributed laterally.
The cam 18 is arranged on the outer side of the front lever, the cam 18 is fixedly connected with the presser foot wrench 19, the cam 18 and the presser foot wrench 19 are used for manually lifting the presser foot, correspondingly, a free distance allowance is reserved between the rolling bearing 6 and the arc groove 5, and the requirement for manually lifting the required moving range of the presser foot can be met. The working mode of manually lifting the presser foot is as follows: the presser foot wrench 19 is rotated to bring the cam 18 into contact with the front lever 13, thereby lifting the presser foot 17.
The pressure lifting pin output shaft 3 at the inner side of the pressure lifting pin crank 4 is sleeved with a magnetic inductor 20, and one side of the magnetic inductor 20 is provided with an inductor housing 21.
Both ends of above-mentioned step motor 1 are provided with motor connecting plate 22, motor connecting plate 22 includes motor connecting portion 22a and casing connecting portion 22b, and motor connecting portion 22a and casing connecting portion 22b all are provided with bolt through-hole 23, motor connecting portion 22a and step motor 1's terminal surface fastening connection, casing connecting portion 22b and sewing machine casing fastening connection.
The motor connecting part 22a and the casing connecting part 22b are vertically arranged, the motor connecting part 22a is square, and the side of the motor connecting part 22a forms an included angle of 45 degrees with the plane of the casing connecting part 22 b.
The fastening connection mode and the hinge mode of each component are all in a mode known in the art, for example, the fastening connection mode adopts screw fastening, and the hinge mode adopts pin hinge.
The thread cutting mechanism can adopt thread cutting structures of various sewing machines.
For example: be provided with the trimming crank on the trimming output shaft, the last pitch arc recess of having seted up of trimming crank, be provided with the gyro wheel articulated with trimming connecting rod one end in the pitch arc recess, the other end of trimming connecting rod is fixed with the cutter drive shaft, be fixed with cutter drive crank on the cutter drive shaft, the other end that cutter drive crank and fixed point are relative articulates the one end that has the short connecting rod of trimming, the one end of the long connecting rod of trimming, the other end of the short connecting rod of trimming articulates there is the dead knife seat, be provided with the dead knife on the dead knife seat, the other end of the long connecting rod of trimming articulates there is the movable knife seat, be.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (7)
1. A presser foot lifting mechanism of a sewing machine is characterized by comprising a double-shaft stepping motor (1) serving as a power source, wherein a thread shearing mechanism is connected to a thread shearing output shaft (2) at one end of the stepping motor (1), a presser foot lifting mechanism is connected to a presser foot lifting output shaft (3) at the other end of the stepping motor, a presser foot lifting crank (4) is arranged on the presser foot lifting output shaft (3), an arc groove (5) is arranged on the presser foot lifting crank (4), a rolling bearing (6) in the arc groove (5) is hinged to one end of a presser foot lifting transmission crank (7), the other end of the presser foot lifting transmission crank (7) is connected with a presser foot lifting shaft (8), a transmission connecting rod (9) is fixedly connected to the presser foot lifting shaft (8), the other end of the transmission connecting rod (9) is hinged to one end of a push rod (10), and the other end of the push rod (10) is hinged to, the other end of the rear lever (11) is hinged with one end of a front lever (13) through a presser foot lifting connecting rod (12), the other end of the front lever (13) is hinged with one end of a presser foot lifting plate (14), the other end of the presser foot lifting plate (14) is in transmission connection with a pressure lever guide frame (15), a pressure lever (16) is fixed on the pressure lever guide frame (15), and a presser foot (17) is arranged at the tail end of the pressure lever (16).
2. The presser foot lifting mechanism of sewing machine according to claim 1, wherein the ejector rod (10) is vertically and vertically upward arranged with respect to the presser foot lifting output shaft (3), the pressing rod (16) is vertically and vertically downward arranged with respect to the presser foot lifting output shaft (3), and the ejector rod (10) and the pressing rod (16) are respectively located at two sides of the stepping motor (1).
3. The presser foot lifting mechanism of sewing machine according to claim 1, wherein said presser foot lifting link (12) is located directly above the stepping motor (1) and laterally distributed.
4. The presser foot lifting mechanism of a sewing machine according to claim 1, wherein a cam (18) is provided on the outer side of the front lever (13), and the cam (18) is fixedly connected with a presser foot wrench (19).
5. The presser foot lifting mechanism of a sewing machine according to claim 1, wherein a magnetic sensor (20) is sleeved on the presser foot lifting output shaft (3) inside the presser foot lifting crank (4), and an inductor cover (21) is arranged on one side of the magnetic sensor (20).
6. The presser foot lifting mechanism of sewing machine according to claim 1, wherein both ends of the stepping motor (1) are provided with motor connecting plates (22), the motor connecting plates (22) comprise a motor connecting part (22a) and a machine shell connecting part (22b), the motor connecting part (22a) and the machine shell connecting part (22b) are provided with bolt through holes (23), the motor connecting part (22a) is tightly connected with the end surface of the stepping motor (1), and the machine shell connecting part (22b) is tightly connected with the sewing machine shell.
7. The presser foot lifting mechanism of sewing machine according to claim 6, wherein said motor connecting portion (22a) and said housing connecting portion (22b) are vertically disposed, said motor connecting portion (22a) is square, and the side thereof forms an angle of 45 ° with the plane of said housing connecting portion (22 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500647.1U CN211498054U (en) | 2019-12-31 | 2019-12-31 | Presser foot lifting mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500647.1U CN211498054U (en) | 2019-12-31 | 2019-12-31 | Presser foot lifting mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211498054U true CN211498054U (en) | 2020-09-15 |
Family
ID=72398208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922500647.1U Active CN211498054U (en) | 2019-12-31 | 2019-12-31 | Presser foot lifting mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211498054U (en) |
-
2019
- 2019-12-31 CN CN201922500647.1U patent/CN211498054U/en active Active
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