CN108823827B - Pressure foot lifting device - Google Patents
Pressure foot lifting device Download PDFInfo
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- CN108823827B CN108823827B CN201810777141.2A CN201810777141A CN108823827B CN 108823827 B CN108823827 B CN 108823827B CN 201810777141 A CN201810777141 A CN 201810777141A CN 108823827 B CN108823827 B CN 108823827B
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- rod
- link
- driving
- presser foot
- frame
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a presser foot lifting device, wherein a first swing rod of the presser foot lifting device is hinged with a first hinged shaft and a driving connecting rod, and a presser foot component is provided with a first preset surface and a second preset surface which are matched with a pushing part of the first swing rod; the second swing rod is hinged to the second hinged shaft, a push rod for pushing the second swing rod is fixedly arranged on the driving connecting rod, and the pressing frame assembly is connected to the second swing rod; the driving device can drive the driving connecting rod to reciprocate so as to drive the first oscillating bar to oscillate around the first articulated shaft; the pushing part can drive the presser foot assembly to move up and down when moving on the first preset surface, and the positions of the second swing rod and the pressing frame assembly are unchanged; when the pushing part moves on the second preset surface, the position of the pressing foot component is unchanged, and the push rod pushes the second swing rod to swing around the second hinge shaft so as to drive the pressing frame component to move up and down. The presser foot lifting device can realize the driving of the pressing frame and the presser foot by the driving device matched with the second swing rod through the clutch action of the push rod, thereby simplifying the assembly debugging process and reducing the cost.
Description
Technical Field
The invention relates to the technical field of clothing manufacturing equipment, in particular to a presser foot lifting device.
Background
In the existing presser foot lifting device, a pressing frame is connected to a driving motor through a set of transmission mechanism, a presser foot is connected to another driving motor through another set of transmission mechanism, the pressing frame and the presser foot need to be respectively driven and controlled, and the device is complex in assembly and debugging and high in cost.
Therefore, how to simplify the assembling and debugging process of the presser foot lifting device and reduce the cost is a technical problem which needs to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention provides a presser foot lifting device, which simplifies the assembly and debugging process and reduces the cost.
In order to achieve the purpose, the invention provides the following technical scheme:
a presser foot lifting device comprises a driving connecting rod, a driving device, a first swing rod, a second swing rod, a presser foot component and a pressing frame component;
one point on the first oscillating bar is hinged to a first hinged shaft, the other point on the first oscillating bar is hinged to the driving connecting rod, and the presser foot component is provided with a first preset surface and a second preset surface which are used for being matched with the pushing part on the first oscillating bar;
the second swing rod is hinged to a second hinged shaft, a push rod for pushing the second swing rod is fixedly arranged on the driving connecting rod, and the pressing frame assembly is connected to the second swing rod;
the driving device can drive the driving connecting rod to reciprocate so as to drive the first oscillating bar to oscillate around the first articulated shaft;
the pushing part can drive the presser foot assembly to move up and down when moving on the first preset surface, and the positions of the second swing rod and the pressing frame assembly are unchanged;
when the pushing part moves on the second preset surface, the position of the presser foot component is unchanged, and the push rod pushes the second oscillating bar to swing around the second hinge shaft so as to drive the pressing frame component to move up and down.
Preferably, a pressing frame pushing hole is formed in the second swing rod, and the push rod is inserted into the pressing frame pushing hole; when the pushing part moves on the second preset surface, the push rod contacts and presses the hole wall of the pressing frame pushing hole, and then the second swing rod is pushed to swing around the second hinged shaft.
Preferably, the pressing frame assembly comprises a pressing frame lifting rod used for connecting a pressing frame and a sliding block hinged to the second swing rod, the sliding block is connected to a first linear slide way on the pressing frame lifting rod in a sliding mode, the pressing frame lifting rod is arranged in a second linear slide way used for limiting the pressing frame lifting rod to perform lifting movement in a sliding mode, the sliding block can drive the pressing frame lifting rod to perform lifting movement in the second linear slide way, and a certain included angle is formed between the first linear slide way and the second linear slide way.
Preferably, the second swing rod comprises a first pressure frame lifting connecting rod and a second pressure frame lifting connecting rod, one of the first pressure frame lifting connecting rod and the second pressure frame lifting connecting rod is provided with a strip-shaped locking hole, the other one of the first pressure frame lifting connecting rod and the second pressure frame lifting connecting rod is fixedly provided with a locking pin, the locking pin is arranged at an adjustable locking position in the locking hole, the pressure frame pushing hole is formed in the second pressure frame lifting connecting rod, and the sliding block is connected with the first pressure frame lifting connecting rod.
Preferably, the presser foot assembly comprises a connecting plate, and the first preset surface and the second preset surface are adjacent arc surfaces arranged on the connecting plate; when the pushing part moves on the second preset surface, the circle center of the second preset surface is located at the first hinged shaft.
Preferably, the pushing part is a roller.
Preferably, the driving connecting rod is hinged to a cam driving rod, the cam driving rod is hinged to the third hinge shaft, a cam matched with the cam driving rod is fixedly arranged on an output shaft of the driving device, and the cam rotates to drive the cam driving rod to swing around the third hinge shaft so as to drive the driving connecting rod to move.
Preferably, a spring for pressing the cam driving lever against the cam is connected to the driving link.
Preferably, the cam driving lever is provided with a bearing for cooperating with the cam.
Preferably, the driving link includes a presser foot link and a frame pressing link, the push rod is a pin bolt fixedly connecting the presser foot link and the frame pressing link, the frame pressing link is connected to the cam driving lever, and the presser foot link is connected to the first swing link.
In the presser foot lifting device provided by the invention, the driving device drives the driving connecting rod to move, and meanwhile, the driving connecting rod drives the first oscillating bar to swing around the first hinge shaft. In the process of swinging the first swing rod, the pushing part of the first swing rod can move on the first preset surface and can also move on the second preset surface, and when the pushing part moves on the first preset surface, the pushing part can drive the presser foot assembly; when the pushing part moves to the second preset surface, the position of the presser foot component cannot be changed, the push rod pushes the second swing rod to swing around the second hinge shaft, and the movement of the second swing rod drives the pressing frame component.
Therefore, the first swing rod can play a role in gap driving, if the movement of the pushing part is limited in the first preset surface, the pushing part drives the presser foot assembly, and the push rod cannot drive the second swing rod, namely the second swing rod cannot drive the pressing frame assembly; if the movement of the pushing part is limited in the second preset surface, the pushing part cannot drive the presser foot assembly, but the push rod can drive the second swing rod, and then the second swing rod can drive the frame pressing assembly. The presser foot lifting device is only provided with one driving device, the driving device is matched with the second swing rod to drive the pressing frame and the presser foot through the clutch action of the push rod, the driving conditions of the pressing frame assembly and the presser foot assembly are not affected mutually, and compared with two sets of transmission mechanisms and two driving devices in the prior art, the presser foot lifting device has the advantages that the arrangement of the driving devices can be reduced, the structure is simple, the space is saved, the assembly and debugging process is simplified, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a front view schematic structure diagram of a presser foot lifting device provided by the invention;
fig. 2 is a rear view of the presser foot lifting device according to the present invention;
fig. 3 is a schematic structural view of a sliding block part in the presser foot lifting device provided by the invention;
fig. 4 is a schematic structural diagram of a first swing link part in the presser foot lifting device provided by the invention.
In fig. 1 to 4:
1-driving device, 2-cam, 3-bearing, 4-cam driving rod, 5-third articulated shaft, 6-first section screw, 7-driving connecting rod, 8-pressing frame lifting rod, 9-first pressing frame lifting connecting rod, 10-second articulated shaft, 11-second pressing frame lifting connecting rod, 12-locking hole, 13-pressing frame pushing hole, 14-pushing rod, 15-pressing foot connecting rod, 16-first articulated shaft, 17-first oscillating bar, 18-roller, 19-connecting plate, 20-intermittent connecting rod, 21-roller pin, 22-second oscillating bar, 23-pressing frame connecting rod, 24-second section screw, 25-third section screw, 26-sliding block, 27-boundary line, 28-first preset surface and 29-second preset surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a presser foot lifting device, which simplifies the assembly and debugging process and reduces the cost.
The embodiment of the presser foot lifting device provided by the invention comprises a driving connecting rod 7, a driving device 1, a first swing rod 17, a second swing rod 22, a presser foot component and a pressing frame component.
One point of the first swing link 17 is hinged to the first hinge shaft 16 and the other point is hinged to the driving link 7, and the movement of the driving link 7 can drive the first swing link 17 to swing around the first hinge shaft 16. The presser foot assembly is provided with a first predetermined surface 28 and a second predetermined surface 29 for cooperation with the push portion on the first swing link 17. Wherein the first hinge shaft 16 is preferably fixed to the housing. Wherein, the presser foot subassembly specifically can be used for connecting and drive the presser foot in.
The second swing link 22 is hinged to the second hinge shaft 10, and the driving link 7 is fixedly provided with a push rod 14 for pushing the second swing link 22. Wherein the second hinge shaft 10 is preferably fixed to the housing. The frame pressing component is connected to the second swing link 22 so as to drive the frame pressing component through the second swing link 22.
The driving device 1 can drive the driving connecting rod 7 to reciprocate so as to drive the first swing rod 17 to swing around the first hinge shaft 16. During the swinging of the first swing link 17, the pushing portion of the first swing link 17 swings accordingly.
When the pushing part moves on the first preset surface 28, the presser foot assembly can be driven to move up and down, and meanwhile, the positions of the second swing rod 22 and the pressing frame assembly are unchanged.
When the pushing part moves on the second preset surface 29, the position of the presser foot assembly is unchanged, and the push rod 14 pushes the second swing rod 22 to swing around the second hinge shaft 10, so as to drive the pressing frame assembly to move up and down.
The first swing link 17 can play a role of gap driving, if the movement of the pushing part is limited in a first preset surface, the pushing part drives the presser foot assembly, and the push rod cannot drive the second swing link 22, namely the second swing link 22 cannot drive the frame pressing assembly; if the movement of the pushing part is limited in the second preset surface, the pushing part does not drive the presser foot assembly, but the push rod drives the second swing rod 22, and the second swing rod 22 drives the frame pressing assembly.
Only one driving device 1 needs to be arranged in the presser foot lifting device, the driving of the pressing frame and the presser foot is realized through the clutch action of the push rod by matching the driving device 1 with the second swing rod 22, the driving conditions of the pressing frame assembly and the presser foot assembly are not influenced mutually, the arrangement of the driving device 1 can be reduced, the structure is simple, the space is saved, the assembly and debugging process is simplified, and the cost is reduced.
On the basis of the above embodiments, referring to fig. 1, the second swing link 22 may be provided with a frame pressing pushing hole 13, and the push rod 14 is inserted into the frame pressing pushing hole 13. When the pushing part moves on the second preset surface 29, the push rod 14 contacts and presses the hole wall of the pressing frame pushing hole 13, and further pushes the second swing rod 22 to swing around the second hinge shaft 10. Taking the orientation shown in fig. 1 as an example, after the push rod 14 moves leftwards to abut against the hole wall of the frame pressing pushing hole 13, the driving link 7 continues to move leftwards, and the push rod 14 can drive the second swing link 22 to rotate around the second hinge shaft 10.
The push rod 14 is freely movable in the frame pressing push hole 13, and optionally, the frame pressing push hole 13 may be a strip-shaped hole.
In this embodiment, the push rod 14 is disposed in the frame pressing pushing hole 13, so that the relative movable range between the push rod 14 and the second swing link 22 can be restricted, and the reliable control of the push rod 14 on the second swing link 22 is ensured.
Obviously, the connection relationship between the push rod 14 and the second swing link 22 is not limited to the frame pressing push hole 13 in the above-mentioned embodiment. For example, the push rod 14 may also be disposed outside the second swing link 22, and the push rod 14 directly pushes the outer peripheral wall of the second swing link 22 to drive the second swing link 22.
On the basis of the above-mentioned embodiment, referring to fig. 1 and 3, the press frame assembly may include a press frame lifting rod 8 for connecting the press frame and a slider 26 hinged to the second swing link 22. Alternatively, the sliding block 26 may be hinged to the second swing link 22 by a third screw 25. The slider 26 is connected to the first linear slideway on the pressing frame lifting rod 8 in a sliding manner, the pressing frame lifting rod 8 is arranged in the second linear slideway in a sliding manner, the second linear slideway is used for limiting the pressing frame lifting rod 8 to perform lifting movement, a certain included angle is formed between the first linear slideway and the second linear slideway, optionally, the included angle can be a right angle, and also can be other angle values larger than 0. The slide block 26 can drive the pressing frame lifting rod 8 to move up and down in the second linear slide way.
When the second swing link 22 rotates, the slider 26 rotates around the second hinge shaft 10 along with the second swing link 22, and under the limit of the first linear slideway and the second linear slideway and the hinge joint between the slider 26 and the second swing link 22, the motion of the slider 26 can be divided into a first partial motion extending along the first linear slideway and a second partial motion extending along the second linear slideway, that is, the slider 26 can drive the press frame lifting rod 8 to perform lifting motion along the second linear slideway while sliding in the first linear slideway, thereby realizing the lifting motion of the press frame.
In this embodiment, through the arrangement of the first linear slideway, the second linear slideway and the sliding block 26, the rotation motion of the second swing link 22 can be converted into the lifting motion of the pressing frame lifting rod 8, so that the falling position of the pressing frame lifting rod 8 can be reliably ensured, the pressing frame can be accurately pressed on the preset position, and the stability of the movement of the pressing frame lifting rod 8 is stronger.
On the basis of the above embodiments, referring to fig. 1 and fig. 2, the second swing link 22 may include a first frame lifting link 9 and a second frame lifting link 11. One of the first pressure frame lifting connecting rod 9 and the second pressure frame lifting connecting rod 11 is provided with a strip-shaped locking hole 12, and the other one is fixedly provided with a locking pin, optionally, the locking hole 12 can be arranged on the second pressure frame lifting connecting rod 11, and the locking pin can be arranged on the first pressure frame lifting connecting rod 9. The locking position of the locking pin in the locking hole 12 is adjustable. The frame pressing pushing hole 13 is arranged on the second frame pressing lifting connecting rod 11, and the sliding block 26 is connected to the first frame pressing lifting connecting rod 9. Wherein, the latch pin is preferably the screw, easy dismounting.
In this embodiment, the locking position of the locking pin in the locking hole is adjustable, and accordingly, the first pressure frame lifting connecting rod 9 and the second pressure frame lifting connecting rod 11 can be connected at different angles, so that the adjustment of the stroke of the pressure frame can be realized.
On the basis of any of the above embodiments, referring to fig. 4, the presser foot assembly may include the connecting plate 19, and the first predetermined surface 28 and the second predetermined surface 29 are adjacent arc surfaces disposed on the connecting plate 19. When the pushing part moves on the second predetermined surface 29, the center of the second predetermined surface 29 is located at the first hinge shaft 16.
Taking the orientation shown in fig. 4 as an example, when the pushing portion moves on the first predetermined surface 28, an included angle is formed between the moving direction of the pushing portion and the tangential direction of the contact point of the pushing portion and the first predetermined surface 28, and the pushing portion always moves upward or downward to drive the first predetermined surface 28, so as to drive the connecting plate 19 to move up and down. When the pushing portion moves on the second predetermined surface 29, since the center of the second predetermined surface 29 is located at the first hinge shaft 16, the moving direction of the pushing portion is the same as the tangential direction of the contact point of the pushing portion and the second predetermined surface 29, and the pushing portion cannot drive the connecting plate 19 to perform the lifting movement.
Wherein, to connecting plate 19, can set up the spacing subassembly of lift in order to restrict connecting plate 19 and carry out elevating movement on the casing to guarantee connecting plate 19 elevating movement's stability. In addition, an intermittent link 20 may be fixedly connected to the connecting plate 19, and the presser foot may be connected by the intermittent link 20.
In this embodiment, the boundary 27 between the first predetermined surface 28 and the second predetermined surface 29 defines an extreme position of the presser foot, and when the connecting plate 19 continues to move on the second predetermined surface 29, the height of the presser foot will not change, thereby preventing the presser foot assembly and the presser foot from being damaged due to over-travel, and ensuring safer use.
Preferably, the first and second predetermined surfaces 28, 29 may be used to determine the uppermost position of the presser foot assembly and thus the presser foot.
Preferably, referring to fig. 4, the pushing portion may be a roller 18 to reduce friction damage between the first swing link 17 and the presser foot assembly. The roller 18 may be hinged to the first swing link 17 by a roller pin 21. At this time, when the pushing portion moves on the second predetermined surface 29, the second predetermined surface 29 is an arc-shaped contact surface with the same radius as the outermost track of the roller 18. Of course, the pushing portion may also be directly provided as one free end of the first swing link 17.
On the basis of any of the above embodiments, referring to fig. 1 and 2, the driving link 7 may be hinged with the cam driving rod 4, and specifically, the cam driving rod 4 may be hinged with the driving link 7 through the first section of screw 6. The cam driving rod 4 is hinged to the third hinge shaft 5, the cam 2 matched with the cam driving rod 4 is fixedly arranged on an output shaft of the driving device 1, and the cam 2 rotates to drive the cam driving rod 4 to swing around the third hinge shaft 5 so as to drive the driving connecting rod 7 to move. Preferably, the driving device 1 may be a rotary motor. The third hinge shaft 5 may be fixed to the housing.
When the cam 2 rotates along with the output shaft, the linear distance between the position of the cam driving rod 4, which is in contact with the cam 2, and the output shaft changes, the cam driving rod 4 rotates around the third hinge shaft 5, and the driving connecting rod 7 correspondingly moves under the pulling of the cam driving rod 4.
In this embodiment, the driving device 1 is directly connected to the primary transmission mechanism in which the cam and the connecting rod move in a matching manner, so that the manufacturing cost can be reduced while the transmission function is ensured.
Further, the driving link 7 may be connected with a spring for pressing the cam driving lever 4 against the cam 2, and particularly, the spring may be connected between the driving link 7 and the housing to ensure uninterrupted contact between the cam driving lever 4 and the cam 2.
Further, referring to fig. 1, the cam driving lever 4 may be provided with a bearing 3 for cooperating with the cam 2, which is beneficial to reduce the friction damage between the cam driving lever 4 and the cam 2.
Further, referring to fig. 1 and 2, the driving link 7 may include a presser foot link 15 and a frame pressing link 23, the push rod 14 is a pin bolt fixedly connecting the presser foot link 15 and the frame pressing link 23, the frame pressing link 23 is connected to the cam driving lever 4, and the presser foot link 15 is connected to the first swing link 17. Alternatively, the presser foot link 15 may be hinged to the first swing link 17 by a second section of screw 24. Optionally, the presser foot link 15 may be a ball head link, which is convenient to adjust, not easy to jam and longer in life. In this embodiment, the driving connecting rod 7 is provided in a split type, so that the length of each part of the driving connecting rod 7 can be conveniently determined according to the distance between the pressing frame and the pressing foot, and meanwhile, the pressing foot connecting rod 15 and the pressing frame connecting rod 23 are connected through the push rod 14, so that the processing is convenient.
Of course, in other embodiments, the cam link mating assembly may be replaced with a gear set for transmission.
The specific use process of the presser foot lifting device provided by the invention in sewing can be divided into preparation for sewing work or sewing completion and sewing work, and the orientation shown in fig. 1 is taken as an example for explanation:
(1) ready for sewing work or at the end of sewing
The driving device 1 provided with the cam 2 rotates clockwise (the cam 2 rotates in the direction from the small radius to the large radius), the cam driving rod 4 rotates around the third hinge shaft 5, the pressing frame connecting rod 23 and the pressing foot connecting rod 15 are connected through the push rod 14, the pressing foot connecting rod 15 and the pressing frame connecting rod 23 are driven to move leftwards (namely in the direction close to the driving device 1) under the action of the cam driving rod 4, the connecting plate 19 and the intermittent connecting rod 20 move upwards through the transmission of the first swing rod 17, the lifting action of the pressing foot is further realized, and when the roller 18 moves to the boundary line 27 on the connecting plate 19 (refer to fig. 4), the pressing foot is lifted to the highest point. The driving connecting rod 7 continues to move leftwards, the connecting plate 19 does not drive the presser foot to lift, the push rod 14 penetrates through the pressing frame pushing hole 13, the push rod 14 also moves to the left edge of the hole wall of the pressing frame pushing hole 13 at the moment, the driving connecting rod 7 continues to move leftwards and drives the second pressing frame lifting connecting rod 11 to rotate leftwards and upwards, the first pressing frame lifting connecting rod 9 is fixedly connected with the second pressing frame lifting connecting rod 11, and then the first pressing frame lifting connecting rod 9 drives the third section screw 25 to move upwards, and the pressing frame lifting rod 8 is driven to move upwards under the action of the sliding block 26.
(2) When sewing work is carried out:
the driving device 1 rotates anticlockwise (the cam 2 rotates from a large radius to a small radius), the pressing frame connecting rod 23 and the presser foot connecting rod 15 move rightwards (namely, in a direction away from the motor), the pressing frame is pressed down under the action of the spring, when the roller 18 moves to the boundary line 27, the pressing frame continues to move, the presser foot begins to descend until the presser foot descends to the bottommost point, and the intermittent connecting rod 20 realizes intermittent movement during sewing under the cooperation of the main shaft crank.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The presser foot lifting device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. The presser foot lifting device is characterized by comprising a driving connecting rod (7), a driving device (1), a first swing rod (17), a second swing rod (22), a presser foot component and a pressing frame component;
one point on the first swing rod (17) is hinged to a first hinged shaft (16) and the other point is hinged to the driving connecting rod (7), and the pressure foot component is provided with a first preset surface (28) and a second preset surface (29) which are used for being matched with a pushing part on the first swing rod (17);
the second swing rod (22) is hinged to the second hinged shaft (10), a push rod (14) used for pushing the second swing rod (22) is fixedly arranged on the driving connecting rod (7), and the pressing frame assembly is connected to the second swing rod (22);
the driving device (1) can drive the driving connecting rod (7) to reciprocate so as to drive the first swing rod (17) to swing around the first hinge shaft (16);
when the pushing part moves on the first preset surface (28), the pressing foot component can be driven to move up and down, and the positions of the second swing rod (22) and the pressing frame component are unchanged;
when the pushing part moves on the second preset surface (29), the position of the presser foot component is unchanged, and the push rod (14) pushes the second swing rod (22) to swing around the second hinge shaft (10) so as to drive the pressing frame component to move up and down;
a frame pressing pushing hole (13) is formed in the second swing rod (22), and the push rod (14) is inserted into the frame pressing pushing hole (13); when the pushing part moves on the second preset surface (29), the push rod (14) contacts and presses the hole wall of the pressing frame pushing hole (13), and then the second swing rod (22) is pushed to swing around the second hinge shaft (10);
the presser foot assembly comprises a connecting plate (19), and the first preset surface (28) and the second preset surface (29) are adjacent arc-shaped surfaces arranged on the connecting plate (19); when the pushing part moves on the second preset surface (29), the circle center of the second preset surface (29) is located at the first hinged shaft (16).
2. The presser foot lifting device according to claim 1, wherein the presser frame assembly comprises a presser frame lifting rod (8) for connecting the presser frame and a slide block (26) hinged to the second swing link (22), the slide block (26) is slidably connected to a first linear slideway on the presser frame lifting rod (8), the presser frame lifting rod (8) is slidably disposed in a second linear slideway for limiting the lifting movement of the presser frame lifting rod (8), the slide block (26) can drive the presser frame lifting rod (8) to move up and down in the second linear slideway, and a certain included angle is formed between the first linear slideway and the second linear slideway.
3. The presser foot lifting device according to claim 2, wherein the second swing link (22) comprises a first pressure frame lifting link (9) and a second pressure frame lifting link (11), one of the first pressure frame lifting link (9) and the second pressure frame lifting link (11) is provided with a strip-shaped locking hole (12), the other one of the first pressure frame lifting link (9) and the second pressure frame lifting link (11) is fixedly provided with a locking pin, the locking position of the locking pin in the locking hole (12) is adjustable, the pressure frame pushing hole (13) is provided on the second pressure frame lifting link (11), and the slide block (26) is connected to the first pressure frame lifting link (9).
4. The presser foot lifting device according to claim 1, wherein the pushing portion is a roller (18).
5. The presser foot lifting device according to any one of claims 1 to 4, wherein the driving link (7) is hinged to a cam driving rod (4), the cam driving rod (4) is hinged to a third hinge shaft (5), a cam (2) matched with the cam driving rod (4) is fixedly arranged on an output shaft of the driving device (1), and the cam (2) can drive the cam driving rod (4) to swing around the third hinge shaft (5) through rotation so as to drive the driving link (7) to move.
6. Presser foot lifting device according to claim 5, wherein a spring for pressing the cam driving lever (4) against the cam (2) is connected to the driving link (7).
7. Presser foot lifting device according to claim 6, wherein the cam driving lever (4) is provided with a bearing (3) for cooperation with the cam (2).
8. The presser foot lifting device according to claim 5, wherein the driving link (7) comprises a presser foot link (15) and a presser frame link (23), the push rod (14) is a pin screw fixedly connecting the presser foot link (15) and the presser frame link (23), the presser frame link (23) is connected with the cam driving lever (4), and the presser foot link (15) is connected with the first swing link (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777141.2A CN108823827B (en) | 2018-07-16 | 2018-07-16 | Pressure foot lifting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777141.2A CN108823827B (en) | 2018-07-16 | 2018-07-16 | Pressure foot lifting device |
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| CN108823827A CN108823827A (en) | 2018-11-16 |
| CN108823827B true CN108823827B (en) | 2020-07-24 |
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| CN201810777141.2A Active CN108823827B (en) | 2018-07-16 | 2018-07-16 | Pressure foot lifting device |
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| JP5265217B2 (en) * | 2008-02-22 | 2013-08-14 | Ｊｕｋｉ株式会社 | Sewing machine lifting device |
| CN202755193U (en) * | 2012-07-11 | 2013-02-27 | 中捷缝纫机股份有限公司 | Presser foot drive mechanism of sewing machine |
| CN203795113U (en) * | 2014-04-15 | 2014-08-27 | 浙江美机缝纫机有限公司 | Presser foot lifting driving mechanism for sewing machine |
| CN104099726A (en) * | 2014-06-24 | 2014-10-15 | 台州拓卡奔马机电科技有限公司 | Driving mechanism for thread sewing and presser foot lifting thread-scissoring and buttonholing machine |
| CN206858780U (en) * | 2017-06-29 | 2018-01-09 | 拓卡奔马机电科技有限公司 | Sewing machine lifts compression shear line mechanism and sewing machine |
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