CN112144182A

CN112144182A - Lift presser foot device and have its sewing machine

Info

Publication number: CN112144182A
Application number: CN201910563738.1A
Authority: CN
Inventors: 傅万滨
Original assignee: Zhejiang Dole Sewing Machine Co ltd
Current assignee: Zhejiang Dole Sewing Machine Co ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-12-29

Abstract

The invention provides a presser foot lifting device and a sewing machine with the same, wherein the presser foot lifting device comprises: a motor; the motor is connected with the input end of the transmission structure so as to drive the transmission structure to move through the motor; the pressure foot is connected with the output end of the transmission structure so as to drive the pressure foot to lift up or fall down through the transmission structure; and the controller is connected with the motor and controls the pressure of the presser foot by controlling the output current of the motor. Through the technical scheme provided by the invention, the technical problem that the pressure of the presser foot is inconvenient to control in the prior art can be solved.

Description

Lift presser foot device and have its sewing machine

Technical Field

The invention relates to the technical field of sewing machines, in particular to a presser foot lifting device and a sewing machine with the same.

Background

Sewing machines are currently machines that use one or more sewing threads to form one or more stitches in the material to interlace or stitch one or more layers of the material. The presser foot lifting device on the sewing machine is used for lifting or putting down the presser foot, and the sewing thread is arranged on the cloth in a penetrating way by lifting and falling the presser foot lifting device so as to realize sewing.

In the prior art, the pressure of the presser foot is generally controlled by controlling the rotation angle of a motor of the presser foot lifting device, the control mode is inconvenient, and meanwhile, the pressure of the presser foot lifting device cannot be accurately controlled. And lift presser foot device among the prior art at the during operation, earlier turn into the turned angle of motor earlier the compression volume of spring, the motion of rethread spring drive presser foot also can make the pressure that the spring transmitted to on the presser foot inaccurate like this.

Disclosure of Invention

The invention mainly aims to provide a presser foot lifting device and a sewing machine with the same, and aims to solve the technical problem that the pressure of a presser foot is not convenient to control in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a presser foot lifting device including: a motor; the motor is connected with the input end of the transmission structure so as to drive the transmission structure to move through the motor; the pressure foot is connected with the output end of the transmission structure so as to drive the pressure foot to lift up or fall down through the transmission structure; and the controller is connected with the motor and controls the pressure of the presser foot by controlling the output current of the motor.

Further, the transmission structure is a connecting rod structure to drive the presser foot to move through the connecting rod structure.

Further, lift presser foot device still includes: the pressure bar is connected with the pressure foot, and the output end of the connecting rod structure is connected with the pressure bar so as to drive the pressure foot to move through the pressure bar.

Furthermore, a sliding groove is formed in the pressure lever, the output end of the connecting rod structure is movably arranged in the sliding groove along the extending direction of the sliding groove, and the output end of the connecting rod structure is abutted against the groove wall of the sliding groove so as to drive the pressure lever to lift or fall through the sliding groove.

Furthermore, the output end of the connecting rod structure is a sliding block, a sliding block seat is arranged on the pressing rod, and a sliding groove is arranged on the sliding block seat so as to drive the pressing rod to lift or fall through the matching of the sliding block and the sliding block seat.

Further, the extending direction of the sliding groove is perpendicular to the moving direction of the pressure rod.

Further, the connecting rod structure comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is connected with the motor, the second end of the first connecting rod is connected with the first end of the second connecting rod, and the second end of the second connecting rod is connected with the presser foot so as to drive the presser foot to lift or fall through the second connecting rod.

Furthermore, a hinged end is arranged on the second connecting rod, so that the first connecting rod drives the second connecting rod to rotate around the hinged end, and the second connecting rod drives the presser foot to move.

Furthermore, the connecting rod structure further comprises a third connecting rod, the third connecting rod is arranged between the first connecting rod and the second connecting rod, and the first connecting rod drives the second connecting rod to move through the third connecting rod.

Further, lift presser foot device still includes guide structure, and guide structure cover is established on the depression bar to guide the motion of depression bar through guide structure.

Furthermore, the guide structure is a guide sleeve component, and the guide sleeve component is sleeved on the pressure rod so as to guide the pressure foot to lift or fall through the guide sleeve component.

Further, the guide sleeve assembly comprises a first guide sleeve and a second guide sleeve, and the first guide sleeve and the second guide sleeve are arranged on the pressure rod at intervals so as to guide the pressure rod to move through the first guide sleeve and the second guide sleeve.

Furthermore, lift presser foot device still includes the depression bar guide frame, and the depression bar guide frame sets up on the depression bar, has spacing arch on the depression bar guide frame, and spacing arch card is established on treating the connecting piece to through the rotation of spacing arch restriction depression bar.

According to another aspect of the present invention, there is provided a sewing machine including: a housing; and the presser foot lifting device is arranged on the machine shell and is used for lifting the presser foot.

By applying the technical scheme of the invention, when the presser foot lifting device works, the motor drives the presser foot to lift or fall, and the controller controls the pressure of the presser foot by controlling the output current of the motor. Therefore, the pressure of the presser foot can be conveniently controlled, and the accuracy of the pressure of the presser foot can be improved, so that the sewing accuracy is improved. Therefore, the technical problem that the pressure of the presser foot is inconvenient to control by the presser foot lifting device in the prior art can be solved by adopting the technical scheme provided by the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a presser foot lifting device provided according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a motor; 20. a transmission structure; 21. a slider; 22. a first link; 23. a second link; 231. a hinged end; 24. a third link; 30. a presser foot; 40. a pressure lever; 50. a slider seat; 60. a guide structure; 61. a first guide sleeve; 62. a second guide sleeve; 70. a compression bar guide frame; 71. a limiting bulge; 80. a needle plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, a first embodiment of the present invention provides a presser foot lifting device, including: motor 10, drive mechanism 20, presser foot 30 and controller. Wherein, the motor 10 is connected with the input end of the transmission structure 20, so as to drive the transmission structure 20 to move through the motor 10. The presser foot 30 is connected with the output end of the transmission structure 20 so as to drive the presser foot 30 to lift or fall through the transmission structure 20. The controller is connected with the motor 10, and the controller controls the pressure of the presser foot 30 by controlling the output current of the motor 10.

By adopting the presser foot lifting device provided by the embodiment of the invention, when the presser foot lifting device works, the motor 10 rotates and drives the presser foot 30 to lift or fall through the transmission structure 20, and meanwhile, the controller controls the output current of the motor 10 according to the actual sewing requirement, thereby achieving the purpose of controlling the pressure of the presser foot 30. The controller in this embodiment may be a computer, and controls the output current of the motor 10 under different sewing conditions by controlling relevant setting parameters of the computer. Therefore, the pressure of the presser foot 30 can be conveniently controlled, the pressure of the presser foot 30 can be accurately adjusted through the controller, the accuracy of pressure adjustment of the presser foot 30 is improved, and the sewing accuracy is further improved. Therefore, the presser foot lifting device provided by the embodiment can solve the technical problem that the presser foot lifting device in the prior art is inconvenient to control the pressure of the presser foot 30.

Specifically, the transmission structure 20 in this embodiment is a link structure, so as to drive the presser foot 30 to move through the link structure. With such an arrangement, the presser foot 30 can be more easily lifted or dropped.

In order to facilitate lifting or lowering the presser foot 30, the presser foot lifting device in this embodiment further includes a pressing rod 40. Wherein, the pressure lever 40 is connected with the pressure foot 30, and the output end of the connecting rod structure is connected with the pressure lever 40 so as to drive the pressure foot 30 to move through the pressure lever 40.

In order to better lift or drop the presser foot 30, the pressing rod 40 in this embodiment is provided with a sliding groove. Specifically, the output end of the connecting rod structure is movably arranged in the sliding groove along the extending direction of the sliding groove, and the output end of the connecting rod structure is abutted against the groove wall of the sliding groove so as to drive the pressing rod 40 to lift or fall through the sliding groove. When the motor 10 rotates, the motor 10 drives the connecting rod structure to move, and the output end of the connecting rod structure slides in the sliding groove and drives the pressing rod 40 to move.

In order to facilitate the output end of the connecting rod structure to be movably arranged in the sliding groove, the output end of the connecting rod structure in the embodiment is the sliding block 21, the sliding block seat 50 is arranged on the pressing rod 40, and the sliding groove is arranged on the sliding block seat 50 so as to drive the pressing rod 40 to lift or fall through the matching of the sliding block 21 and the sliding block seat 50. With such an arrangement, the stability of the entire structure can be improved, and the presser foot 30 can be driven to lift or fall more stably.

Specifically, the extending direction of the sliding groove is perpendicular to the moving direction of the pressing rod 40. The pressing rod 40 in this embodiment moves vertically up and down in a direction perpendicular to the needle plate 80, and in order to better drive the pressing rod 40 to move up and down through the transmission structure 20, the extending direction of the sliding groove is set to be a horizontal direction. Adopt such setting, the motion of link structure's output will be divided into the motion of horizontal direction and the motion of vertical direction, the motion of link structure output in order to carry out the horizontal direction is slided along the extending direction of sliding tray, the link structure output drives presser foot 30 and lifts or falls down in order to carry out the motion of vertical direction along vertical direction, like this, can conveniently shift the effort of the vertical direction of link structure output on presser foot 30 entirely, in order to compress tightly the cloth to faller 80, the waste of energy has been avoided simultaneously.

In this embodiment, the link structure includes a first link 22 and a second link 23, a first end of the first link 22 is connected to the motor 10, a second end of the first link 22 is connected to a first end of the second link 23, and a second end of the second link 23 is connected to the presser foot 30, so as to drive the presser foot 30 to lift or fall through the second link 23.

In order to improve the stability of the structure and movement of the link structure, the second link 23 in this embodiment is provided with a hinge end 231. Specifically, the hinged end 231 is hinged to the housing, and the first link 22 drives the second link 23 to rotate around the hinged end 231, and drives the presser foot 30 to move through the second link 23.

To facilitate increased flexibility of movement, the link structure in this embodiment further includes a third link 24. The third link 24 is disposed between the first link 22 and the second link 23, and the first link 22 drives the second link 23 to move through the third link 24.

In order to better lift or drop the presser foot 30, the presser foot lifting device in this embodiment further includes a guide structure 60. The guide structure 60 is sleeved on the pressing rod 40 to guide the movement of the pressing rod 40 through the guide structure 60.

Specifically, the guiding structure 60 in this embodiment is a guiding sleeve assembly, which is sleeved on the pressing rod 40 to guide the pressure foot 30 to lift or fall through the guiding sleeve assembly.

To better guide the movement of the presser foot 30, the guide sleeve assembly in this embodiment comprises a first guide sleeve 61 and a second guide sleeve 62. The first guide sleeve 61 and the second guide sleeve 62 are spaced apart from each other on the pressing rod 40 to guide the movement of the pressing rod 40 through the first guide sleeve 61 and the second guide sleeve 62.

In this embodiment, the presser foot lifting device further includes a presser bar guide frame 70, the presser bar guide frame 70 is disposed on the presser bar 40, the presser bar guide frame 70 has a limiting protrusion 71, and the limiting protrusion 71 is clamped on the member to be connected to limit the rotation of the presser bar 40 by the limiting protrusion 71. Specifically, the to-be-connected component is a casing, a limiting groove is formed in the casing, and the limiting protrusion 71 is arranged in the limiting groove to prevent the pressing rod 40 from rotating.

By adopting the presser foot lifting device provided by the embodiment, during sewing, the motor 10 outputs a clockwise moment, the clockwise moment is converted into a downward pressure through the transmission structure 20 and is applied to the slider seat 50, and the slider seat 50 drives the pressing rod 40 and the presser foot 30 to move downwards together, so that the downward pressure of the slider seat 50 can be converted into the downward pressure of the presser foot 30. The pressure value of the presser foot 30 can be adjusted by changing the current of the motor 10.

After sewing is finished, the controller controls the motor 10 to output a counterclockwise moment, the counterclockwise moment is converted into an upward pressure through the transmission structure 20 and is applied to the slider seat 50, and the slider seat 50 drives the pressing rod 40 and the presser foot 30 to move upward together, so that the presser foot 30 is pulled upward, and the action of lifting the presser foot 30 is finished. The elevation height of the presser foot 30 depends on the angle of rotation of the motor 10.

An embodiment of the present invention provides a sewing machine, including: a machine shell and a presser foot lifting device. The presser foot lifting device is arranged on the machine shell and is the presser foot lifting device in the first embodiment.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the pressure of the presser foot 30 can be conveniently controlled by the controller, and the sewing accuracy is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A presser foot lifting device, comprising:

a motor (10);

the motor (10) is connected with the input end of the transmission structure (20) so as to drive the transmission structure (20) to move through the motor (10);

the presser foot (30) is connected with the output end of the transmission structure (20) so as to drive the presser foot (30) to lift or fall through the transmission structure (20);

the controller is connected with the motor (10) and controls the pressure of the presser foot (30) by controlling the output current of the motor (10).

2. The presser foot lifting device according to claim 1, wherein the transmission structure (20) is a link structure for moving the presser foot (30) via the link structure.

3. The presser foot lifting device according to claim 2, further comprising:

the pressure lever (40), the pressure lever (40) is connected with the presser foot (30), and the output end of the connecting rod structure is connected with the pressure lever (40) so as to drive the presser foot (30) to move through the pressure lever (40).

4. The presser foot lifting device according to claim 3, wherein the presser bar (40) is provided with a sliding groove, the output end of the link structure is movably arranged in the sliding groove along the extending direction of the sliding groove, and the output end of the link structure is abutted with the groove wall of the sliding groove so as to drive the presser bar (40) to be lifted or dropped through the sliding groove.

5. The device for lifting and pressing foot as claimed in claim 4, characterized in that the output end of the connecting rod structure is a slider (21), a slider seat (50) is arranged on the pressing rod (40), and the sliding groove is arranged on the slider seat (50) so as to drive the pressing rod (40) to lift or fall through the cooperation of the slider (21) and the slider seat (50).

6. Presser foot lifting device according to claim 4, wherein the sliding slot extends in a direction perpendicular to the direction of movement of the presser bar (40).

7. The presser foot lifting device according to claim 2, wherein the link structure comprises a first link (22) and a second link (23), a first end of the first link (22) is connected to the motor (10), a second end of the first link (22) is connected to a first end of the second link (23), and a second end of the second link (23) is connected to the presser foot (30) so as to drive the presser foot (30) to be lifted or dropped by the second link (23).

8. The presser foot lifting device according to claim 7, wherein a hinged end (231) is provided on the second link (23) such that the first link (22) rotates the second link (23) about the hinged end (231) and the presser foot (30) is moved by the second link (23).

9. The lift foot presser device according to claim 7, characterized in that the link structure further comprises a third link (24), the third link (24) being arranged between the first link (22) and the second link (23), the first link (22) moving the second link (23) via the third link (24).

10. The device according to claim 3, further comprising a guide structure (60), wherein the guide structure (60) is fitted over the pressing rod (40) to guide the movement of the pressing rod (40) through the guide structure (60).

11. The device according to claim 10, wherein the guide structure (60) is a guide sleeve assembly that fits over the pressure bar (40) to guide the pressure foot (30) to be raised or lowered by the guide sleeve assembly.

12. The lift presser foot arrangement according to claim 11, wherein the guide sleeve assembly comprises a first guide sleeve (61) and a second guide sleeve (62), the first guide sleeve (61) and the second guide sleeve (62) being arranged on the presser bar (40) at intervals to guide the movement of the presser bar (40) through the first guide sleeve (61) and the second guide sleeve (62).

13. The presser foot lifting device according to claim 11, further comprising a pressing rod guide frame (70), wherein the pressing rod guide frame (70) is arranged on the pressing rod (40), the pressing rod guide frame (70) is provided with a limiting protrusion (71), and the limiting protrusion (71) is clamped on a to-be-connected member so as to limit the rotation of the pressing rod (40) through the limiting protrusion (71).

14. A sewing machine, characterized in that it comprises:

a housing;

a presser foot lifting device provided on the housing, the presser foot lifting device being as claimed in any one of claims 1 to 13.