CN217026313U - Composite driving mechanism of sewing machine and sewing machine with same - Google Patents
Composite driving mechanism of sewing machine and sewing machine with same Download PDFInfo
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- CN217026313U CN217026313U CN202123008726.4U CN202123008726U CN217026313U CN 217026313 U CN217026313 U CN 217026313U CN 202123008726 U CN202123008726 U CN 202123008726U CN 217026313 U CN217026313 U CN 217026313U
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- rocker arm
- sewing machine
- presser foot
- cam
- arm component
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Abstract
The utility model relates to the technical field of sewing equipment and discloses a compound driving mechanism of a sewing machine and the sewing machine with the compound driving mechanism, which comprises a driving shaft, an adjusting cam and a presser foot lifting cam, wherein the adjusting cam and the presser foot lifting cam are respectively fixedly sleeved on the driving shaft and synchronously rotate with the driving shaft; the needle pitch adjusting mechanism further comprises a first rocker arm part, a connecting rod of the swing seat and a feeding shaft which are sequentially connected, and when the needle pitch is adjusted, the middle part of the first rocker arm part is abutted against the adjusting cam; the presser foot lifting mechanism further comprises a second rocker arm component, a mandril and a rear lever which are sequentially connected, and when the presser foot is lifted, the middle part of the second rocker arm component is abutted to the presser foot lifting cam. The utility model controls the action of lifting the presser foot of the sewing machine and adjusting the size of the sewing needle pitch or performing backstitch operation by the same power drive control source, simplifies the structure and operation of the sewing machine, ensures the control precision, effectively reduces the cost and improves the quality of the sewn stitches.
Description
Technical Field
The utility model relates to the technical field of sewing equipment, in particular to a compound driving mechanism of a sewing machine and the sewing machine with the compound driving mechanism.
Background
The general sewing machine has two auxiliary mechanisms, a presser foot lifting mechanism and a needle distance adjusting and backstitching mechanism, which are driven independently and perform related mechanical actions independently. The presser foot lifting mechanism has the following functions: the seam material is compressed, the stitch quality is improved, and meanwhile, the counter-acting force of the feeding teeth of the feeding mechanism is provided. The needle pitch adjusting and backstitching mechanism has the following functions: the length of the sewing needle pitch and the reinforcement through local reciprocating threads are conveniently adjusted by adjusting the movement distance and the movement direction of the feeding teeth of the feeding mechanism during the backstitch operation.
Along with the development of electronic control technology, the application of the electronic control technology on the sewing machine is mature day by day, the two traditional independent mechanical actuating mechanisms have complex structures and various parts, the cost is increased, the space is occupied, and the quality of the sewn stitches needs to be further improved so as to meet the continuously increasing requirements of the market. The Chinese invention patent (application publication No. 105821597A, application publication No. 2016.08.03) discloses an automatic presser foot lifting and backward and forward sewing device of a sewing machine. The lifting and pressing foot driver is provided with a first straight rod capable of reciprocating, and the first straight rod is connected with one end of a pull rope of the pull rope component; the other end of the pull rope is connected with one end of the swinging rod; the swing rod can swing around the swing center; the other end of the swinging rod is in contact with one end of a pressure foot lifting rear lever, and the pressure foot lifting rear lever can swing around the axis of the pressure foot lifting rear lever; the other end of the lever after lifting the presser foot is connected with the presser foot lifting mechanism, and the operation of the presser foot lifting mechanism can be driven through the swing of the lever after lifting the presser foot; the backward and forward sewing driver is provided with a second straight rod capable of reciprocating, the second straight rod is connected with one end of a pull rod, and the other end of the pull rod is connected with the swinging plate seat; the swing plate seat can swing around the swing axis of the swing plate seat, and the operation of backward and forward seams can be realized through the swing of the swing plate seat. It can be known from the above that the above patent includes two drivers, be respectively lift presser foot driver and two down and up seam drivers, has the defect such as complicated structure, with high costs.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a compound driving mechanism of a sewing machine and the sewing machine with the compound driving mechanism.
In order to solve the technical problem, the utility model is solved by the following technical scheme:
a composite driving mechanism of a sewing machine comprises a driving shaft, an adjusting cam and a presser foot lifting cam, wherein the adjusting cam and the presser foot lifting cam are respectively fixedly sleeved on the driving shaft and synchronously rotate with the driving shaft;
the needle pitch adjusting mechanism further comprises a first rocker arm part, a connecting rod of the swing seat and a feeding shaft which are sequentially connected, and when the needle pitch is adjusted, the middle part of the first rocker arm part is abutted against the adjusting cam;
the presser foot lifting mechanism further comprises a second rocker arm component, a mandril and a rear lever which are sequentially connected, and when the presser foot is lifted, the middle part of the second rocker arm component is abutted to the presser foot lifting cam.
The device also comprises a return spring with one end connected with the machine body, and the other end of the return spring is connected to the swing seat connecting rod.
The swing seat connecting rod is vertically arranged between the first rocker arm component and the swing seat, and the lower end of the swing seat connecting rod is connected with the feeding shaft through the swing seat.
The rocking arm component I and the rocking arm component II are arranged side by side and are respectively and rotatably sleeved on the rocking arm shaft, and the rocking arm shaft penetrates through the end part of the rocking arm component I far away from one end of the connecting rod of the swinging seat and the end part of the rocking arm component II far away from one end of the ejector rod.
The first roller is rotatably arranged in the middle of the first rocker arm part, and the first rocker arm part is abutted against the adjusting cam through the first roller; the second roller is rotatably arranged in the middle of the second rocker arm component, and the second rocker arm component is abutted against the pressure raising foot cam through the second roller.
The end part of the first rocker arm part, which is close to one end of the connecting rod of the swinging seat, is rotatably connected with the upper end of the connecting rod of the swinging seat; the transverse line of the second rocker arm component is arranged above the pressure raising foot cam, and the end part of the second rocker arm component, which is close to one end of the push rod, is rotatably connected with the lower end of the push rod.
A sewing machine comprises the composite driving mechanism of the sewing machine.
Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that: the same power drive control source is used for controlling the action of lifting the presser foot of the sewing machine and adjusting the size of the sewing needle pitch or performing backstitch operation, so that the structure and the operation of the sewing machine are simplified, the control precision is ensured, the cost is effectively reduced, and the quality of the sewn stitches is improved.
Drawings
Fig. 1 is a perspective view of the compound drive mechanism of the present invention.
Fig. 2 is a schematic perspective view of the stitch length adjusting and backstitch driving mechanism.
Fig. 3 is a schematic perspective view of the presser foot lifting drive mechanism.
The names of the parts designated by the numerical references in the drawings are as follows: 1-driving shaft, 2-adjusting cam, 3-pressure foot lifting cam, 4-rocker arm component I, 5-swing seat connecting rod, 6-feeding shaft, 7-rocker arm component II, 8-ejector rod, 9-rear lever, 10-reset spring, 11-swing seat, 12-rocker arm shaft, 13-roller I, 14-roller II.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
A compound driving mechanism of a sewing machine is disclosed, as shown in figures 1 to 3, comprising a driving shaft 1, an adjusting cam 2 and a presser foot lifting cam 3, wherein the adjusting cam 2 and the presser foot lifting cam 3 are respectively fixedly sleeved on the driving shaft 1 and synchronously rotate with the driving shaft 1. The needle pitch adjusting mechanism further comprises a first rocker arm part 4, a connecting rod 5 of the swing seat and a feeding shaft 6 which are sequentially connected, and when the needle pitch is adjusted, the middle part of the first rocker arm part 4 is abutted to the adjusting cam 2. The lifting presser foot mechanism further comprises a second rocker arm component 7, a mandril 8 and a rear lever 9 which are connected in sequence, wherein the rear lever 9 is connected with the lifting presser foot and drives the lifting presser foot to do the action of lifting the presser foot, and when the presser foot is lifted, the middle part of the second rocker arm component 7 is abutted against the cam 3 of the lifting presser foot. The driving shaft 1 is driven to rotate by the driving motor, the driving motor is a stepping motor or a servo motor, the adjusting cam 2 and the pressure lifting foot cam 3 synchronously rotate along with the driving shaft 1, when the adjusting cam 2 abuts against the middle part of the first rocker arm part 4 by controlling the rotating direction of the driving motor, the pressure lifting foot cam 3 is separated from the middle part of the second rocker arm part 7, and when the pressure lifting foot cam 3 abuts against the middle part of the second rocker arm part 7, the adjusting cam 2 is separated from the middle part of the first rocker arm part 4, so that the interference of needle distance adjustment or backstitch adjustment and pressure lifting foot action is avoided. The driving motor controls the adjusting cam 2 to rotate by a corresponding angle through the driving shaft 1, so that the needle pitch is adjusted, and the sewing machine can be controlled to carry out backstitch adjustment. The drive motor controls the rotation angle of the presser foot lifting cam 3 through the drive shaft 1, so that the presser foot lifting can do the presser foot lifting action. The structure of the driving mechanism is simplified, the cost of the driving mechanism is effectively reduced, and meanwhile, the stitch quality of sewing is also improved.
And the other end of the return spring 10 is connected to the swing seat connecting rod 5. The lower end of the return spring 10 is connected to the machine body and located on the inner side of the swing seat connecting rod 5, the upper end of the return spring 10 is connected between the middle portion and the upper end portion of the swing seat connecting rod 5, the return spring 10 rotates towards the first rocker arm part 4 by pulling the upper end of the swing seat connecting rod 5, when the needle pitch is adjusted, the end portion of the first rocker arm part 4 is tightly attached to the adjusting cam 2, and the needle pitch adjusting precision is improved.
The device also comprises a swing seat 11, a swing seat connecting rod 5 is vertically arranged between the first rocker arm component 4 and the swing seat 11, and the lower end of the swing seat connecting rod 5 is connected with the feeding shaft 6 through the swing seat 11. When the needle pitch is adjusted, the adjusting cam 2 rotates and abuts against the first rocker arm part 4 to push the first rocker arm part 4 to act, and the swing seat connecting rod 5 pushes the swing seat 11 to swing under the driving of the first rocker arm part 4, so that the position of the feeding shaft 6 is adjusted, and the adjustment of the needle pitch or the adjustment of backstitch is realized.
The swing mechanism further comprises a rocker arm shaft 12 fixedly installed on the machine body, the rocker arm part I4 and the rocker arm part II 7 are parallelly and rotatably sleeved on the rocker arm shaft 12 respectively, and the rocker arm shaft 12 penetrates through the end part, far away from one end of the swing seat connecting rod 5, of the rocker arm part I4 and the end part, far away from one end of the ejector rod 8, of the rocker arm part II 7. The first rocker arm component 4 abuts against the middle of the first rocker arm component through the adjusting cam 2 and controls the rotation angle of the first rocker arm component 4 around the rocker arm shaft 12, and the second rocker arm component 7 abuts against the middle of the second rocker arm component through the lifting and pressing pin cam 3 and controls the rotation angle of the second rocker arm component 7 around the rocker arm shaft 12, so that control over needle pitch adjustment, backstitch adjustment and lifting and pressing pin actions is achieved, and the flexibility of rotation of the first rocker arm component 4 and the second rocker arm component 7 is improved. The mode and the structure of driving the first rocker arm part 4 and the second rocker arm part 7 to swing are simplified.
The first rocker arm part 4 is transversely arranged above the adjusting cam 2, and the end part of the first rocker arm part 4 close to one end of the swing seat connecting rod 5 is rotatably connected with the upper end of the swing seat connecting rod 5; the second rocker arm component 7 is arranged above the presser foot lifting cam 3 in a transverse line mode, and the end part, close to one end of the ejector rod 8, of the second rocker arm component 7 is rotatably connected with the lower end of the ejector rod 8. The swing seat connecting rod 5 and the rocker arm shaft 12 are respectively connected with two ends of the rocker arm component I4, the adjusting cam 2 pushes the middle part of the rocker arm component I4 to swing up and down, swing control over the swing seat connecting rod 5 is achieved, similarly, control over the ejector rod 8 is achieved through the pressure lifting pin cam 3, and the control structure and the control mode for driving the rocker arm component I4 and the rocker arm component II 7 are simplified.
Example 2
A compound driving mechanism of a sewing machine is disclosed, as shown in figures 1 to 3, on the basis of embodiment 1, the compound driving mechanism further comprises a first roller 13 and a second roller 14, wherein the first roller 13 is rotatably arranged in the middle of a first rocker arm part 4, and when the needle pitch is adjusted, the first rocker arm part 4 is abutted to a profile surface of an adjusting cam 2 through the first roller 13, so that the friction between the first rocker arm part 4 and the adjusting cam 2 is reduced, and the matching flexibility of the first rocker arm part 4 and the adjusting cam 2 is improved; the roller II 14 is rotatably arranged in the middle of the rocker arm component II 7, when the presser foot is lifted, the rocker arm component II 7 is abutted to the profile surface of the presser foot lifting cam 3 through the roller II 14, the friction between the rocker arm component II 7 and the presser foot lifting cam 3 is reduced, and the matching flexibility of the rocker arm component II 7 and the presser foot lifting cam 3 is improved.
Example 3
A sewing machine, as shown in figures 1 to 3, comprises a compound drive mechanism of a sewing machine as described above.
Claims (7)
1. A compound driving mechanism of a sewing machine is characterized in that: the device comprises a driving shaft (1), an adjusting cam (2) and a presser foot lifting cam (3), wherein the adjusting cam (2) and the presser foot lifting cam (3) are respectively fixedly sleeved on the driving shaft (1) and synchronously rotate with the driving shaft (1);
the needle pitch adjusting mechanism is characterized by further comprising a first rocker arm part (4), a connecting rod (5) of a swing seat and a feeding shaft (6) which are connected in sequence, wherein the middle part of the first rocker arm part (4) is abutted against the adjusting cam (2) during needle pitch adjustment;
the presser foot lifting mechanism is characterized by further comprising a second rocker arm component (7), a push rod (8) and a rear lever (9) which are connected in sequence, and when the presser foot is lifted, the middle of the second rocker arm component (7) is abutted to the presser foot lifting cam (3).
2. A compound drive mechanism of a sewing machine according to claim 1, characterized in that: the swing seat further comprises a return spring (10) with one end connected with the machine body, and the other end of the return spring (10) is connected to the swing seat connecting rod (5).
3. A compound drive mechanism of a sewing machine according to claim 1, characterized in that: the device is characterized by further comprising a swinging seat (11), a swinging seat connecting rod (5) is vertically arranged between the first rocker arm component (4) and the swinging seat (11), and the lower end of the swinging seat connecting rod (5) is connected with the feeding shaft (6) through the swinging seat (11).
4. The compound drive mechanism of a sewing machine according to claim 1, characterized in that: the swing mechanism is characterized by further comprising a rocker arm shaft (12) fixedly installed on the machine body, the rocker arm component I (4) and the rocker arm component II (7) are parallelly arranged and are respectively and rotatably sleeved on the rocker arm shaft (12), and the rocker arm shaft (12) penetrates through the end portion, far away from one end of the swing seat connecting rod (5), of the rocker arm component I (4) and the end portion, far away from one end of the ejector rod (8), of the rocker arm component II (7).
5. A compound drive mechanism of a sewing machine according to claim 1, characterized in that: the rocker arm component I (4) is supported against the adjusting cam (2) through the roller I (13); the roller II (14) is rotatably arranged in the middle of the rocker arm part II (7), and the rocker arm part II (7) is abutted against the presser foot lifting cam (3) through the roller II (14).
6. The compound drive mechanism of a sewing machine according to claim 1, characterized in that: the first rocker part (4) is transversely arranged above the adjusting cam (2), and the end part of the first rocker part (4) close to one end of the swinging seat connecting rod (5) is rotatably connected with the upper end of the swinging seat connecting rod (5); the transverse line of the second rocker arm component (7) is arranged above the pressure raising and pressing foot cam (3), and the end part of the second rocker arm component (7) close to one end of the ejector rod (8) is rotatably connected with the lower end of the ejector rod (8).
7. A sewing machine characterized in that: compound drive comprising a sewing machine according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008726.4U CN217026313U (en) | 2021-11-30 | 2021-11-30 | Composite driving mechanism of sewing machine and sewing machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008726.4U CN217026313U (en) | 2021-11-30 | 2021-11-30 | Composite driving mechanism of sewing machine and sewing machine with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217026313U true CN217026313U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123008726.4U Active CN217026313U (en) | 2021-11-30 | 2021-11-30 | Composite driving mechanism of sewing machine and sewing machine with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217026313U (en) |
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2021
- 2021-11-30 CN CN202123008726.4U patent/CN217026313U/en active Active
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