CN219315226U - Presser foot pressure adjusting device and sewing machine - Google Patents
Presser foot pressure adjusting device and sewing machine Download PDFInfo
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- CN219315226U CN219315226U CN202320341585.8U CN202320341585U CN219315226U CN 219315226 U CN219315226 U CN 219315226U CN 202320341585 U CN202320341585 U CN 202320341585U CN 219315226 U CN219315226 U CN 219315226U
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- presser foot
- pressure
- lifting plate
- presser
- guide part
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Abstract
A presser foot pressure adjusting device and a sewing machine comprise a sliding guide part, wherein the sliding guide part pulls a pressing rod to lift and slide, a sliding pair is arranged between the sliding guide part and a driving mechanism, and the limiting position of the sliding pair enables the driving mechanism to squeeze or drag the sliding guide part to move; an elastic module is arranged between the driving mechanism and the sliding guide part and used for supporting the sliding guide part and adjusting the downward extrusion pressure of the compression bar; the sewing machine using the presser foot pressure adjusting device improves production efficiency.
Description
Technical Field
The utility model relates to the technical field of presser foot pressure regulation of sewing machines, in particular to a presser foot pressure regulating device and a sewing machine.
Background
The existing pressure regulating mode mainly comprises the steps of regulating the pressure of the presser foot by manually screwing a pressure regulating screw and a pressure regulating nut, and is time-consuming and labor-consuming, and the pressure of the presser foot cannot be regulated accurately;
the existing presser foot lifting mechanism is driven by an electromagnet and a stepping motor, and the stepping motor drives the presser foot lifting mechanism is driven by the stepping motor through a cam, a connecting rod mechanism and the like;
although the realization difficulty and the reliability of the two presser foot lifting technologies are easy to obtain, the functions are single, and the technology cost is high;
therefore, how to realize the adjustment of the pressure of the presser foot and enable the presser foot to accord with the development trend of automation, namely the presser foot can be matched with an operation panel or a button such as a switch is adopted to enable the presser foot to have the possibility of adjustment, and the presser foot is a main way for improving the production efficiency and the use convenience.
Therefore, there is a need for an improved presser foot pressure adjustment structure for use in sewing machines.
Disclosure of Invention
In view of the above, the utility model aims to provide a presser foot pressure adjusting device and a sewing machine, which can be adjusted by a motor, can share a motor with a presser foot lifting device, has extremely low cost, does not need to use a tool for auxiliary adjustment, only needs to use a button or a switch or a range switch for matching adjustment, accords with the automatic development trend, improves the automation level of the production of the sewing machine, improves the operation convenience, and provides a feasible structural basis for the presser foot pressure digitization.
The utility model is technically characterized in that a stepping motor arranged on the shell controls the pressure of the presser foot and the pressure of the presser foot through a crank, a connecting rod and the like, the structure of a bottom plate oil sealing disc is not limited, and a transmission mechanism is simple and reliable.
The present application aims to solve one of the problems in the background art.
The technical scheme adopted by the utility model is as follows: in order to achieve the above and other related objects, the present utility model provides a presser foot pressure adjusting device, including a sliding guide portion, wherein the sliding guide portion pulls a pressing rod to lift and slide, a sliding pair is disposed between the sliding guide portion and a driving mechanism, and a limit position of the sliding pair causes the driving mechanism to squeeze or drag the sliding guide portion to move; an elastic module is arranged between the driving mechanism and the sliding guide part and used for supporting the sliding guide part and adjusting the downward extrusion pressure of the compression bar.
The application provides a technical scheme still has following technical feature:
preferably, the sliding guide part is a compression bar guide frame, the driving mechanism comprises a presser foot lifting plate, and the elastic module is a spring.
Preferably, a spring and a push rod are arranged between the pressure bar guide frame and the presser foot lifting plate.
Preferably, the spring is sleeved on the ejector rod, and two ends of the spring respectively abut against the presser foot lifting plate and the pressure bar guide frame.
Preferably, the ejector rod is arranged on the presser foot lifting plate, and the presser foot lifting plate is L-shaped.
Preferably, a sliding groove is formed in the presser foot lifting plate, a sliding block is arranged on the pressure bar guide frame, and the sliding block and the sliding groove form a sliding pair.
Preferably, the pressure regulating spring presses the sliding guide part, so that the pressure rod is pressed downwards.
Preferably, the presser foot lifting plate is driven by a presser foot pressure front lever, three hinging points are arranged on the presser foot pressure front lever, the machine shell, the pull rod and the presser foot lifting plate are respectively hinged, the presser foot pressure front lever is provided with an arc-shaped groove for limiting, and the pull rod drives the presser foot pressure front lever to rotate and then drives the presser foot lifting plate to enable the presser foot lifting plate to be lifted upwards or lowered downwards.
Preferably, the stepping motor drives the pull rod to pull or release the front pressure lever of the presser foot through a crank mechanism and a connecting rod mechanism.
Preferably, the chute is a recess with an open upper side.
Preferably, a sewing machine is provided with the presser foot pressure adjusting device.
The utility model has the following beneficial effects:
1. according to the utility model, the ejector rod is fixed on the presser foot lifting plate, and the spring is additionally arranged between the presser foot lifting plate and the pressure bar guide frame, so that the compression amount of the spring is regulated through the motor, and the upward force of the spring on the pressure bar guide frame when the presser foot is pressed down is changed, thereby playing a role of easily regulating the pressure of the presser foot; the structure can be regulated by a motor by means of a crank mechanism and a connecting rod mechanism, is time-saving and labor-saving, can be regulated accurately, and shares a motor with the presser foot lifting, so that the cost is extremely low;
2. the stepping motor drives the presser foot through the crank, the connecting rod and the like, and compared with a cam mechanism type driving presser foot with high processing difficulty and high precision requirement, the technical cost is greatly reduced;
3. according to the utility model, the ejector rod and the spring are additionally arranged between the presser foot lifting plate and the pressure lever guide frame, and the compression amount of the spring can be accurately regulated through the stepping motor, so that the pressure when the presser foot is pressed down can be accurately regulated; the digital accurate adjustment of the presser foot pressure is hopeful to be realized. The pressure adjusting and the pressure lifting of the presser foot are a common stepping motor, the structure is simple and reliable, the time and the labor can be saved through the motor, the pressure of the presser foot can be accurately adjusted, and the technical cost is extremely low.
Drawings
FIG. 1 is a perspective view of a presser foot pressure adjustment device of the present utility model;
FIG. 2 is a perspective view of a presser foot pressure adjustment device of the present utility model;
FIG. 3 is a perspective view of a presser foot pressure adjustment device of the present utility model;
FIG. 4 is a perspective view of a presser foot pressure adjustment device of the present utility model;
FIG. 5 is a perspective view of an application of a presser foot pressure adjustment device of the present utility model;
FIG. 6 is a front view of an application of a presser foot pressure adjustment device of the present utility model;
in the figure:
1. casing of machine
2. Stepping motor
3. Presser foot driving crank
4. Driving connecting rod
5. Presser foot crank pin
6. Presser foot crank
7. Presser foot crank support
8. Presser foot ball connecting rod
9. Pressure rear lever of presser foot
10. Pull rod
11. Presser foot pressure front lever
12. Front lever shaft pin
13. Presser foot lifting plate
14. Ejector rod
15. Spring
16. Pressure regulating screw
17. Pressure regulating spring
18. Pressure regulating guide rod
19. Compression bar guide frame
20. Compression bar
21. Presser foot
111. Front lever fulcrum
112. Arc groove limit
131. Ejector rod fixing threaded hole
132. Groove
201. A motor shaft;
Detailed Description
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present utility model and are not intended to be limiting.
In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
1-4, a presser foot pressure adjusting device comprises a sliding guide part, wherein the sliding guide part pulls a pressing rod 20 to lift and slide, a sliding pair is arranged between the sliding guide part and a driving mechanism, and the limiting position of the sliding pair enables the driving mechanism to squeeze or drag the sliding guide part to move; an elastic module is arranged between the driving mechanism and the sliding guide part and is used for supporting the sliding guide part and adjusting the downward extrusion pressure of the compression bar 20.
The application has the following characteristics: the driving structure with the elastic allowance is formed by using the added elastic module and the sliding pair, and the elastic module can offset the pressure born by part of the compression bar 20, so that the purpose of adjusting the pressure is realized; secondly, the pressure adjustment can be directly driven by the motor of the original driving pressure lever 20, namely, the actions of lifting the pressure lever 20 and driving the pressure lever 20 downwards are realized by the feeding amount and the rotation direction of the motor; the structure is compact, and the structure foundation for realizing the adjustment of automation, buttons and digitization is provided.
Specifically, as shown in fig. 1-4, the sliding guide part is a compression bar guide frame 19, the driving mechanism comprises a presser foot lifting plate 13, the elastic module is a spring 15, the spring 15 is arranged between the presser foot lifting plate 13 and the compression bar guide frame 19, and a sliding pair is arranged, so that a driving structure with elasticity and allowance adjustment can be realized.
Specifically, the spring 15 and the ejector rod 14 are arranged between the pressure bar guide frame 19 and the pressure foot lifting plate 13, and the spring 15 and the ejector rod 14 can be separately or jointly sleeved, so long as a movement allowance exists between the pressure bar guide frame 19 and the pressure foot lifting plate 13, and rigid traction can be provided at the limit position, and elastic support is generated in the movement allowance process.
Specifically, as shown in fig. 1, the spring 15 is sleeved on the ejector rod 14, two ends of the spring 15 respectively abut against the presser foot lifting plate 13 and the presser bar guide frame 19, and the elastic abutting is utilized to offset the pressure of the pressure adjusting spring 17 received by part of the presser bar guide frame 19, so that the purpose of adjusting the pressure of the presser foot 21 is achieved.
Specifically, as shown in fig. 1-2, the ejector rod 14 is disposed on the presser foot lifting plate 13, the presser foot lifting plate 13 is L-shaped, and the structure can be matched with the protrusion of the pressure lever guide frame 19 to form a groove or a chute structure, so as to provide a space for sliding between the two.
Specifically, a sliding groove is formed in the presser foot lifting plate 13, a sliding block is arranged on the pressure bar guide frame 19, and the sliding block and the sliding groove form a sliding pair.
Specifically, the pressure adjusting spring 17 presses the sliding guide portion, so that the pressure lever 20 is pressed downward, and the working pressure of the pressure lever 20 is provided, and is the object of adjustment in the present application.
Specifically, the presser foot lifting plate 13 is driven by the presser foot pressure front lever 11, three hinge points are arranged on the presser foot pressure front lever 11 and are respectively hinged with the casing 1, the pull rod 10 and the presser foot lifting plate 13, an arc-shaped groove limit 112 is arranged on the presser foot pressure front lever 11, and the pull rod 10 drives the presser foot pressure front lever 11 to rotate and then drives the presser foot lifting plate 13, so that the presser foot lifting plate 13 is lifted upwards or lowered downwards.
Specifically, the stepping motor 2 drives the pull rod 10 to pull or release the presser foot pressure front lever 11 through a crank mechanism and a link mechanism.
Specifically, the chute is a groove 132 with an open upper side, and the structure is compact and meets the current structural requirements.
In particular, the technical effect can be achieved by applying the presser foot pressure adjusting device of the sewing machine, and further the production efficiency of the sewing machine is improved.
In general, the present application is implemented and used such that, as shown in fig. 5 to 6, a stepping motor 2 is mounted on a housing 1, the stepping motor 2 includes a motor shaft 201, and the other end of the motor shaft 201 is mounted on the housing 1; the presser foot driving crank 3 is arranged on the fixed motor shaft 201 through two screws; the presser crank bracket 7 is arranged on the shell 1, and the presser crank 6 is axially positioned and arranged on the presser crank bracket 7 through the presser crank pin 5 and the screw; the presser crank pin 5 is fixed on the presser crank bracket 7 by a screw, and the presser crank 6 can relatively rotate on the presser crank pin 5; the presser foot driving crank 3 and the presser foot crank 6 are connected by a driving connecting rod 4 and an axial screw and a nut; the mounting position of the stepping motor can also avoid the limitation that the bottom plate must be in an oil-free structure or oil sealing treatment.
The lever 9 is fixed on the shell 1 by an axial screw after the presser foot presses and can rotate relatively; one end of the presser foot crank is connected with the presser foot crank 6 by virtue of the presser foot ball connecting rod 8 and the axial screw, and the other end of the presser foot crank is connected with the front presser foot pressure lever 11 by virtue of the pull rod 10 and the axial screw and the lever shaft; the presser foot pressure front lever 11 is fixed on the shell 1 through a threaded pin and a clamp spring in a limiting manner, can be pulled by the pull rod 10, rotates relative to the front lever fulcrum 111 and is limited by an arc-shaped groove 112; the presser foot pressure front lever 11 is also connected with a presser foot lifting plate 13 by a front lever shaft pin 12 and a clamp spring;
when the motor shaft 201 is driven by the stepping motor 2 to rotate anticlockwise by a certain angle, the presser foot driving crank 3 is driven to rotate, and the presser foot driving crank 3 is pulled downwards through the driving connecting rod 4 and drives the presser foot crank 6 to rotate anticlockwise; the presser foot crank 6 rotating anticlockwise jacks up the presser foot ball connecting rod 8 and the presser foot pressure rear lever 9 is jacked up by the presser foot ball connecting rod 8; the jacked presser foot pressure rear lever 9 rotates clockwise and pulls the pull rod 10 so as to pull the presser foot pressure front lever 11 to rotate anticlockwise, and drives the presser foot lifting plate 13 to lift upwards; in contrast, when the motor shaft 201 is driven by the stepping motor 2 to rotate clockwise by a certain angle, the presser foot driving crank 3 is driven to rotate, and the presser foot driving crank 3 is jacked up through the driving connecting rod 4 and drives the presser foot crank 6 to rotate clockwise; the clockwise rotating presser foot crank 6 pulls the presser foot ball connecting rod 8 downwards and the presser foot pressure rear lever 9 is pulled by the presser foot ball connecting rod 8; the pulled presser foot pressure rear lever 9 rotates anticlockwise and releases the pull rod 10, so that the presser foot pressure front lever 11 is released to rotate clockwise to drive the presser foot lifting plate 13 to drop downwards;
the presser foot lifting plate 13 is provided with a mandril fixing threaded hole 131, and the mandril 14 is fixed on the presser foot lifting plate 13; the spring 15 is positioned by the ejector rod 14 and is positioned between the presser foot lifting plate 13 and the presser bar guide 19; the pressure bar guide 19 is fixed on the pressure bar 20 through a screw, and the protruding part of the pressure bar guide 19 is clamped into the pressure foot lifting plate 13 and the sliding groove of the machine shell 1, so that the movement direction of the pressure bar guide 19 is ensured; the pressure regulating screw 16 can be screwed into the shell 1, a pressure regulating guide rod 18 penetrates through the pressure regulating screw 16, the pressure regulating spring 17 is positioned by the pressure regulating guide rod 18, and two ends of the pressure regulating spring are respectively contacted with the pressure regulating screw 16 and the pressure rod 20; the pressure regulating screw 16 is rotated to compress and loosen the pressure regulating spring 17 to regulate the pressure of the pressure regulating spring 17 to the pressure rod 20, so that the pressure of the presser foot 21 is regulated;
before the ejector rod 14 is not contacted with the pressure bar guide frame 19, the stepping motor 2 controls the presser foot lifting plate 13 to lift or put down, the presser foot lifting plate 13 does not lift or put down the presser foot 21, but the pressure of the presser foot 21 is changed; the stepping motor 2 can control the distance between the presser foot lifting plate 13 and the pressure lever guide frame 19 by controlling the lifting of the presser foot lifting plate so as to determine the compression degree of the spring 15; the more the presser foot lifting plate 13 is lifted, the smaller the distance between the presser foot lifting plate and the presser bar guide frame 19 is, the greater the compression degree of the spring 15 is, and the greater the upward force of the spring 15 on the presser bar guide frame 19 is, so that the smaller the downward resultant force applied to the presser bar 20 is, the smaller the pressure of the presser foot 21 is; conversely, lowering the presser foot lifting plate 13 will eventually increase the pressure of the presser foot 21;
when the stepping motor 2 controls the presser foot lifting plate 13 to lift a certain height so that the ejector rod 14 is contacted with the pressure bar guide frame 19, the presser foot lifting plate 13 continuously lifts to drive the pressure bar guide frame 19 and the pressure bar 20, so that the presser foot 21 is lifted; conversely, after the ejector 14 contacts the presser bar guide 19, the presser foot lifting plate 13 is lowered to lower the presser bar guide 19 and the presser bar 20, thereby lowering the presser foot 21.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. The pressure regulating device of the presser foot comprises a sliding guide part, and is characterized in that the sliding guide part pulls a pressing rod (20) to lift and slide, a sliding pair is arranged between the sliding guide part and a driving mechanism, and the limiting position of the sliding pair enables the driving mechanism to squeeze or drag the sliding guide part to move; an elastic module is arranged between the driving mechanism and the sliding guide part and used for supporting the sliding guide part and adjusting the downward extrusion pressure of the compression bar (20).
2. A presser foot pressure regulating device as claimed in claim 1, characterized in that the sliding guide is a presser bar guide (19), the drive mechanism comprises a presser foot lifting plate (13), and the elastic means is a spring (15).
3. A presser foot pressure adjusting device according to claim 1, characterized in that a spring (15) and a push rod (14) are arranged between the presser bar guide (19) and the presser foot lifting plate (13).
4. The presser foot pressure adjusting device according to claim 1, wherein a spring (15) is sleeved on the ejector rod (14), and two ends of the spring (15) respectively abut against the presser foot lifting plate (13) and the pressure bar guide frame (19).
5. A presser foot pressure adjusting device as claimed in claim 1, characterized in that the ejector rod (14) is arranged on the presser foot lifting plate (13), the presser foot lifting plate (13) being L-shaped.
6. The presser foot pressure adjusting device according to claim 1, characterized in that a slide groove is arranged on the presser foot lifting plate (13), a slide block is arranged on the presser bar guide frame (19), and the slide block and the slide groove form a sliding pair.
7. A presser foot pressure adjusting device according to claim 1, characterized in that the pressure adjusting spring (17) presses the sliding guide part to press the presser bar (20) downward; the stepping motor (2) drives the pull rod (10) to pull or loosen the front pressure lever (11) of the presser foot through a crank mechanism and a connecting rod mechanism.
8. The presser foot pressure adjusting device according to claim 2, wherein the presser foot lifting plate (13) is driven by a presser foot pressure front lever (11), three hinge points are arranged on the presser foot pressure front lever (11) and are respectively hinged with the machine shell (1), the pull rod (10) and the presser foot lifting plate (13), an arc-shaped groove limit (112) is arranged on the presser foot pressure front lever (11), and the pull rod (10) drives the presser foot lifting plate (13) after driving the presser foot pressure front lever (11) to rotate so that the presser foot lifting plate (13) is lifted upwards or lowered downwards.
9. The presser foot pressure regulating device of claim 6, wherein said runner is an open-top recess (132).
10. A sewing machine comprising a presser foot pressure adjustment device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320341585.8U CN219315226U (en) | 2023-02-28 | 2023-02-28 | Presser foot pressure adjusting device and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320341585.8U CN219315226U (en) | 2023-02-28 | 2023-02-28 | Presser foot pressure adjusting device and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219315226U true CN219315226U (en) | 2023-07-07 |
Family
ID=87033565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320341585.8U Active CN219315226U (en) | 2023-02-28 | 2023-02-28 | Presser foot pressure adjusting device and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219315226U (en) |
-
2023
- 2023-02-28 CN CN202320341585.8U patent/CN219315226U/en active Active
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