CN212293992U - Lift presser foot and mutual volume adjusting device of presser foot - Google Patents
Lift presser foot and mutual volume adjusting device of presser foot Download PDFInfo
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- CN212293992U CN212293992U CN202022440536.9U CN202022440536U CN212293992U CN 212293992 U CN212293992 U CN 212293992U CN 202022440536 U CN202022440536 U CN 202022440536U CN 212293992 U CN212293992 U CN 212293992U
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Abstract
The utility model belongs to the technical field of sewing equipment, in particular to a presser foot lifting and presser foot interaction amount adjusting device; the lower end of the presser foot lifting crank is connected with a front pull rod of the presser foot lifting mechanism, the presser foot lifting crank can be driven to swing around the middle part to drive the presser foot lifting when the presser foot lifting driving surface acts on the upper end of the presser foot lifting crank, and the swinging shaft does not act at the moment; the two ends of the oscillating shaft are respectively connected with one end of the interaction quantity adjusting left crank and one end of the interaction quantity adjusting right crank, the other end of the interaction quantity adjusting right crank is connected with the oscillating rod pin, the presser foot interaction quantity adjusting driving surface acts on the other end of the interaction quantity adjusting left crank to drive the oscillating shaft to rotate so as to drive the other end of the interaction quantity adjusting right crank to drive the oscillating rod pin to swing up and down to adjust the presser foot interaction quantity, and at the moment, the presser foot lifting crank does not act; the utility model discloses a driving motor, compound cam can realize respectively lifting presser foot and the mutual volume of presser foot and adjust compact structure, reduce cost.
Description
The technical field is as follows:
the utility model belongs to the technical field of sewing equipment, refer in particular to a lift presser foot and mutual volume adjusting device of presser foot.
Background art:
the presser foot of the sewing machine compresses the cloth before starting sewing, presses the cloth onto the cloth feeding teeth during sewing, and enables the teeth and the cloth to have enough friction force to convey the cloth, thereby ensuring normal sewing. When multilayer thick sewing materials are sewn, the feeding requirement cannot be met by feeding of the feed dog alone, the cloth slips and is not fed, so that the pressing foot feeding is realized by alternately arranging the inner pressing foot and the outer pressing foot, when the outer pressing foot is contacted with the feed dog for feeding, the inner pressing foot is lifted, and when the outer pressing foot is not contacted with the feed dog, the inner pressing foot is used for pressing, so that the pressing foot feeding is realized. When the sewing process includes the steps of folding multiple layers of cloth, the thickness of one section of cloth is inconsistent, the height difference forms the step, the relative height of the inner presser foot and the outer presser foot, namely the interaction amount, needs to be adjusted when the presser foot needs to pass through the step, so that the outer presser foot can step through the step, and normal sewing is realized.
Chinese utility model patent publication No. CN 211227609U discloses a sewing machine presser foot interaction amount adjusting device, which can be adjusted manually or automatically by an adjusting cylinder. When the presser foot lifting mechanism needs to be arranged, an additional set of presser foot lifting mechanism needs to be arranged, so that the defects of non-compact structure, high cost and the like are caused.
The invention content is as follows:
the utility model aims at providing a can realize lifting presser foot and mutual volume of presser foot regulation lift presser foot and the mutual volume adjusting device of presser foot through one set of actuating mechanism.
The utility model discloses a realize like this:
a presser foot lifting and presser foot interaction amount adjusting device comprises a driving motor, a compound cam, a presser foot lifting crank and a swinging shaft, wherein the middle part of the presser foot lifting crank is rotatably arranged on a machine shell, the swinging shaft can rotate around the axis of the presser foot lifting crank; the two ends of the swing shaft are respectively connected with one end of the interaction quantity adjusting left crank and one end of the interaction quantity adjusting right crank, the other end of the interaction quantity adjusting right crank is connected with the swing rod pin, the presser foot interaction quantity adjusting driving surface acts on the other end of the interaction quantity adjusting left crank to drive the swing shaft to rotate so as to drive the other end of the interaction quantity adjusting right crank to drive the swing rod pin to swing up and down to adjust the presser foot interaction quantity, and at the moment, the presser foot lifting crank does not act.
In the presser foot lifting and presser foot interaction amount adjusting device, the upper end of the presser foot lifting crank is provided with the presser foot lifting roller.
In the presser foot lifting and presser foot interaction amount adjusting device, the composite cam includes a first wheel body and a second wheel body, the first wheel body and the second wheel body are coaxially arranged, a spiral lifting surface and a first plane are arranged on the outer circumference of the front side surface of the first wheel body, a cam portion is arranged on the outer cylindrical surface of the second wheel body, a cam surface of the cam portion is a presser foot interaction amount adjusting driving surface, and the size from the outer end of the cam surface to the center of the first wheel body is larger than the size from the inner end to the center of the first wheel body.
In the presser foot lifting and presser foot interaction amount adjusting device, a second plane is arranged at the highest end of the spiral lifting surface, and the spiral lifting surface and the second plane form a presser foot lifting driving surface.
In the presser foot lifting and presser foot interaction amount adjusting device, the compound cam further comprises a wheel body III, the wheel body I, the wheel body II and the wheel body III are coaxially provided with mounting holes, a rotating shaft of the driving motor is inserted in the mounting holes, the wheel body II is provided with threaded holes, and screws are screwed in the threaded holes to fixedly arrange the compound cam on the rotating shaft of the driving motor.
In the presser foot lifting and presser foot interaction amount adjusting device, the driving motor is arranged on the motor mounting plate, a through hole is formed in the motor mounting plate, a rotating shaft of the driving motor penetrates through the through hole and extends out of the motor mounting plate, a bearing is arranged between the third wheel body and the through hole, an outer ring of the bearing is connected with an inner wall of the through hole, and an inner ring of the bearing is connected with an outer cylindrical surface of the third wheel body.
In the presser foot lifting and presser foot interaction amount adjusting device, the swing shaft is rotatably arranged on the swing shaft mounting seat, and the swing shaft mounting seat is fixedly arranged on the machine shell.
In the presser foot lifting and presser foot interaction amount adjusting device, the lower end of the presser foot lifting crank is further connected with a rear pull rod, the rear pull rod is connected with a knee control connecting rod, the knee control connecting rod is rotatably installed in the machine shell, and the knee control connecting rod is further connected with the ejector rod.
In the presser foot lifting and presser foot interaction amount adjusting device, the interaction amount adjusting right crank is connected with the tension spring, one end of the tension spring is connected with the interaction amount adjusting right crank, and the other end of the tension spring is hung on the machine shell.
In the presser foot lifting and presser foot interaction amount adjusting device, the other end of the interaction amount adjusting left crank is provided with the oscillating bar roller, and the oscillating bar roller is attached to the outer surface of the wheel body II and rolls.
Compared with the prior art, the utility model outstanding advantage is:
1. the utility model discloses a driving motor, compound cam can realize lifting presser foot and the mutual volume regulation of presser foot, and both mutually noninterfere, compact structure, reduce cost.
2. The utility model discloses can realize that mutual volume reaches the biggest fast and resumes to the setting value fast.
3. The utility model discloses can realize lifting the presser foot function fast, and can realize lifting the not co-altitude of presser foot as required.
Description of the drawings:
fig. 1 is a first perspective view of the present invention;
fig. 2 is a second schematic perspective view of the present invention;
fig. 3 is a first schematic diagram of the compound cam of the present invention;
fig. 4 is a second schematic view of the compound cam of the present invention.
In the figure: 1. a drive motor; 2. a compound cam; 3. lifting a presser foot crank; 4. a swing shaft; 5. an axial screw; 6. a front pull rod; 7. a lifting lever; 8. a guide frame; 9. a hold down bar; 10. an inner presser foot; 11. lifting the presser foot roller; 12. adjusting a left crank by the interaction amount; 13. adjusting a right crank by the interaction amount; 14. a swing rod roller; 15. a rocker pin; 16. adjusting a first oscillating bar; 17. adjusting a swing rod II; 18. an adjustment head; 19. an adjustment cam; 20. adjusting a knob; 21. a return spring; 22. adjusting the connecting rod; 23. an eccentric wheel; 24. an upper shaft; 25. a connecting rod; 26. a lifting crank; 27. a presser foot lift shaft; 28. a presser foot lifting crank; 29. a presser foot feeding crank connecting rod; 30. a presser foot crank; 31. a swing rod; 32. a swing presser bar; 33. an outer presser foot; 34. a connecting rod; 35. a wheel body I; 36. a second wheel body; 37. a spiral lifting surface; 38. a first plane; 39. a cam portion; 40. a second plane; 41. a wheel body III; 42. mounting holes; 43. a rotating shaft; 44. a motor mounting plate; 45. a bearing; 46. a swing rod shaft mounting base; 47. a rear pull rod; 48. a knee control link; 49. a tension spring; 50. a tension spring hook.
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 4:
the utility model provides a lift presser foot and mutual volume adjusting device of presser foot, includes that driving motor 1, compound cam 2, middle part rotate install lift presser foot crank 3, can be around its axis pivoted oscillating axle 4 in the casing driving motor 1 adopts step motor or servo motor, the preferred step motor of this embodiment. The middle part of the presser foot lifting crank 3 is arranged on the machine shell through a shaft position screw 5, the compound cam 2 comprises a presser foot lifting driving surface and a presser foot interaction amount adjusting driving surface, the lower end of the presser foot lifting crank 3 is connected with a front pull rod 6 of a presser foot lifting mechanism through a pull rod screw, the compound cam 2 is driven to rotate by a driving motor 1, when the presser foot lifting driving surface acts on the upper end of the presser foot lifting crank 3, the presser foot lifting crank 3 can be driven to swing left and right around the middle part to drive the presser foot lifting, and at the moment, the swinging shaft 4 does not act; the presser foot lifting mechanism comprises a front pull rod 6, the other end of the front pull rod 6 is connected to a lifting lever 7, the lifting lever 7 is rotatably installed in the machine shell, the other end of the lifting lever 7 is located below a guide frame 8, the guide frame 8 is fixed on a pressing rod 9, and an inner presser foot 10 is arranged at the lower end of the pressing rod 9. When the upper end of the presser foot lifting crank 3 swings rightwards, the front pull rod 6 pulls the lifting lever 7 to rotate, the guide frame 8 is driven to move upwards, the pressing rod 9 is driven to move upwards, and the action of lifting the presser foot is achieved. Different heights of the pressure foot can be realized according to the position of the upper end of the pressure foot lifting crank 3 on the pressure foot lifting driving surface. In order to make the rotation flexible, the upper end of the presser foot lifting crank 3 of the utility model is provided with the presser foot lifting roller 11, and the presser foot lifting roller 11 rolls along the corresponding surface on the compound cam 2.
The two ends of the oscillating shaft 4 are respectively connected with one end of an interaction quantity adjusting left crank 12 and one end of an interaction quantity adjusting right crank 13, the other end of the interaction quantity adjusting left crank 12 is provided with a swing rod roller 14, the other end of the interaction quantity adjusting right crank 13 is connected with a swing rod pin 15 of the presser foot interaction quantity adjusting mechanism, the presser foot interaction quantity adjusting driving surface acts on the swing rod roller 14 of the interaction quantity adjusting left crank 12 to drive the oscillating shaft 4 to rotate so as to drive the interaction quantity adjusting right crank 13 to drive the swing rod pin 15 to swing up and down to adjust the presser foot interaction quantity, and the presser foot lifting crank 3 does not act at the moment. The presser foot interaction amount adjusting mechanism comprises a swing rod pin 15, a first adjusting swing rod 16 and a second adjusting swing rod 17, wherein one end of the first adjusting swing rod 16 is fixedly arranged on the swing rod pin 15, the other end of the first adjusting swing rod 16 is connected to the pin shaft, an adjusting head 18 is further arranged at the other end of the first adjusting swing rod 16, an adjusting cam 19 is arranged below the adjusting head 18, and the adjusting cam 19 is driven to rotate by an adjusting knob 20. An extension arm extends downwards from the bottom surface of the other end of the first adjusting swing rod 16, a return spring 21 is arranged on the extension arm, one end of the return spring 21 is connected with the extension arm, and the other end of the return spring is hung on the machine shell. The return spring makes the first adjusting pendulum 16 always have a downward force to make the adjusting head 18 contact with the adjusting cam 19. The interaction value can be preset by adjusting the knob 20. The other end of the second adjusting swing rod 17 is connected with an upper shaft 24 through an adjusting connecting rod 22 and an eccentric wheel 23 respectively, and is connected with a presser foot lifting shaft 27 through a connecting rod 25 and a lifting crank 26, the presser foot lifting shaft 27 is sequentially connected with a presser foot lifting crank 28, a presser foot feeding crank connecting rod 29, a presser foot crank 30 and a swing rod 31 and is connected with a swing presser foot rod 32, and the lower end of the swing presser foot rod 32 is connected with an outer presser foot 33. The presser foot crank 30 is also connected with the pressing rod 9 through a connecting rod 34 and a guide frame 8, and the inner presser foot 10 is arranged at the lower end of the pressing rod 9.
The utility model discloses an mutual volume is adjusted left crank 12 and is driven mutual volume and adjust right crank 13 luffing motion, realizes that mutual volume reaches the biggest fast and resumes the setting value fast (the setting value can change through adjust knob 20).
As shown in fig. 3 and 4, the compound cam 2 includes a first wheel body 35 and a second wheel body 36, the first wheel body 35 and the second wheel body 36 are coaxially disposed, a spiral lifting surface 37 and a first plane 38 are disposed on an outer circumference of a front side surface of the first wheel body 35, a cam portion 39 is disposed on an outer cylindrical surface of the second wheel body 36, a cam surface of the cam portion 39 is a presser foot mutual quantity adjustment driving surface, a size from an outer end of the cam surface to a center of the first wheel body 35 is larger than a size from an inner end to a center of the first wheel body 35, and the cam portion 39 is disposed corresponding to the first plane 38.
When the upper end of the presser foot lifting crank 3 is located at the lowest position (i.e., the null position a) of the presser foot lifting drive surface, the other end of the interaction amount adjusting left crank 12 is also located at the lowest position (i.e., the null position b) of the presser foot interaction amount adjusting drive surface. When the compound cam 2 is rotated and the cam surface rotated to the cam portion 39 acts on the interaction amount adjustment right crank 13, the presser interaction amount adjustment is performed, and at this time, the presser lifting roller 11 of the presser lifting crank 3 rolls along the first plane 38, and the presser lifting operation is not performed. On the contrary, when the compound cam 2 rotates and the upper end of the presser foot lifting crank 3 moves along the presser foot lifting driving surface, the action of the presser foot lifting is carried out, the upper end of the presser foot lifting crank 3 realizes different presser foot lifting heights at different positions on the spiral lifting surface 37, the swing rod roller 14 on the interaction quantity adjusting left crank 12 rolls along the outer cylindrical surface of the wheel body II 36, and at the moment, the interaction quantity adjusting right crank 13 does not act and does not carry out interaction quantity adjustment.
The utility model discloses the highest end of spiral lifting face 37 is provided with second plane 40, and spiral lifting face 37 forms with second plane 40 and lifts presser foot drive face. When the upper end of the presser foot lifting crank 3 is located on the second plane 40, the presser foot is raised to the highest. The second plane 40 is arranged to leave a margin of error.
As shown in fig. 1, the driving motor 2 is disposed on the motor mounting plate 44, a through hole is disposed on the motor mounting plate 44, the rotating shaft 43 of the driving motor 2 passes through the through hole and extends out of the motor mounting plate 44, a bearing 45 is disposed between the wheel body three 41 and the through hole, an outer ring of the bearing 45 is connected with an inner wall of the through hole, and an inner ring of the bearing 45 is connected with an outer cylindrical surface of the wheel body three 41.
The swing shaft 4 of the utility model is rotatably arranged on the swing shaft mounting seat 46, and the swing shaft mounting seat 46 is fixedly arranged on the casing. In order to improve the flexibility of the swing shaft 4 in rotation, a bearing is provided between the swing shaft 4 and the swing shaft mounting base 46.
The utility model discloses the presser foot is lifted in the knee accuse of having remain. The lower end of the presser foot lifting crank 3 is further connected with a rear pull rod 47, the rear pull rod 47 is connected with a knee control connecting rod 48, the knee control connecting rod 48 is rotatably installed in the machine shell, and the knee control connecting rod 48 is further connected with a push rod.
In order to enable the interaction quantity adjusting left crank 12 to be always attached to the compound cam 2, the interaction quantity adjusting right crank 13 is connected with a tension spring 49, the interaction quantity adjusting right crank 13 is provided with a tension spring hook 50, one end of the tension spring 49 is hung on the tension spring hook 50, and the other end of the tension spring 49 is hung on the machine shell.
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 (10)
1. The utility model provides a lift presser foot and mutual volume adjusting device of presser foot which characterized in that: the composite cam (2) is driven by the driving motor (1) to rotate, and comprises a presser foot lifting crank (3) and a swinging shaft (4) which can rotate around the axis of the presser foot lifting crank, wherein the middle part of the presser foot lifting crank is rotatably arranged on a machine shell, the composite cam (2) comprises a presser foot lifting driving surface and a presser foot interaction quantity adjusting driving surface, the lower end of the presser foot lifting crank (3) is connected with a front pull rod (6) of a presser foot lifting mechanism, the presser foot lifting driving surface can drive the presser foot lifting crank (3) to swing around the middle part to drive the presser foot lifting when acting on the upper end of the presser foot lifting crank (3), and the swinging shaft (4) does not act at the moment; the two ends of the swinging shaft (4) are respectively connected with one end of the interaction quantity adjusting left crank (12) and one end of the interaction quantity adjusting right crank (13), the other end of the interaction quantity adjusting right crank (13) is connected with the swinging rod pin (15), the presser foot interaction quantity adjusting driving surface acts on the other end of the interaction quantity adjusting left crank (12) to drive the swinging shaft (4) to rotate so as to drive the other end of the interaction quantity adjusting right crank (13) to drive the swinging rod pin (15) to swing up and down to adjust the presser foot interaction quantity, and the presser foot lifting crank (3) does not act at the moment.
2. The presser foot lifting and presser foot interaction amount adjusting device according to claim 1, characterized in that: the upper end of the presser foot lifting crank (3) is provided with a presser foot lifting roller (11).
3. The presser foot lifting and presser foot interaction amount adjusting device according to claim 1, characterized in that: the composite cam (2) comprises a first wheel body (35) and a second wheel body (36), the first wheel body (35) and the second wheel body (36) are coaxially arranged, a spiral lifting surface (37) and a first plane (38) are arranged on the outer circumference of the front side surface of the first wheel body (35), a cam portion (39) is arranged on the outer cylindrical surface of the second wheel body (36), a cam surface of the cam portion (39) is a presser foot interaction amount adjusting driving surface, and the size from the outer end of the cam surface to the center of the first wheel body (35) is larger than the size from the inner end to the center of the first wheel body (35).
4. The presser foot lifting and presser foot interaction amount adjusting device according to claim 3, characterized in that: the highest end of the spiral lifting surface (37) is provided with a second plane (40), and the spiral lifting surface (37) and the second plane (40) form a lifting pin driving surface.
5. The presser foot lifting and pressing interaction amount adjusting device according to claim 3 or 4, wherein: the composite cam (2) further comprises a wheel body III (41), the wheel body I (35), the wheel body II (36) and the wheel body III (41) are coaxially provided with mounting holes, a rotating shaft of the driving motor (1) is inserted into the mounting holes, the wheel body II (36) is provided with a threaded hole, and a screw is screwed in the threaded hole to fixedly arrange the composite cam (2) on the rotating shaft (23) of the driving motor (1).
6. The presser foot lifting and presser foot interaction amount adjusting device according to claim 5, characterized in that: driving motor (1) sets up on motor mounting panel (44), be provided with the through-hole on motor mounting panel (44), the pivot of driving motor (1) passes the through-hole and stretches out outside the motor mounting panel, be provided with bearing (45) between wheel body three (41) and the through-hole, the outer lane of bearing (45) and the interior wall connection of through-hole, inner circle and the outer face of cylinder of wheel body three (41) are connected.
7. The presser foot lifting and presser foot interaction amount adjusting device according to claim 1, characterized in that: the swing shaft (4) is rotatably arranged on a swing shaft mounting seat (46), and the swing shaft mounting seat (46) is fixedly arranged on the machine shell.
8. The presser foot lifting and presser foot interaction amount adjusting device according to claim 1, characterized in that: the lower end of the presser foot lifting crank (3) is further connected with a rear pull rod (47), the rear pull rod (47) is connected with a knee control connecting rod (48), the knee control connecting rod (48) is rotatably installed in the machine shell, and the knee control connecting rod (48) is further connected with the ejector rod.
9. The presser foot lifting and presser foot interaction amount adjusting device according to claim 1, characterized in that: the interaction quantity adjusting right crank (13) is connected with a tension spring (49), one end of the tension spring (49) is connected with the interaction quantity adjusting right crank (13), and the other end of the tension spring is hung on the shell.
10. The presser foot lifting and presser foot interaction amount adjusting device according to claim 1, characterized in that: the other end of the interaction quantity adjusting left crank (12) is provided with a swing rod roller (14), and the swing rod roller (14) is attached to the outer surface of the second wheel body (36) to roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022440536.9U CN212293992U (en) | 2020-10-28 | 2020-10-28 | Lift presser foot and mutual volume adjusting device of presser foot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022440536.9U CN212293992U (en) | 2020-10-28 | 2020-10-28 | Lift presser foot and mutual volume adjusting device of presser foot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212293992U true CN212293992U (en) | 2021-01-05 |
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ID=73935133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022440536.9U Active CN212293992U (en) | 2020-10-28 | 2020-10-28 | Lift presser foot and mutual volume adjusting device of presser foot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212293992U (en) |
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2020
- 2020-10-28 CN CN202022440536.9U patent/CN212293992U/en active Active
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