A sewing machine capable of conveniently adjusting the height of the middle presser foot

Abstract

The utility model relates to the technical field of textile machinery, and provides a sewing machine which is convenient for adjusting the pressing height and has strong applicability and is convenient for adjusting the height of a middle presser foot. The utility model comprises a processing table and a main power unit arranged on the processing table, a sewing head is arranged at the upper end of the main power unit, the sewing head comprises a connecting shell fixedly connected to the end surface of the main power unit and a sewing needle column connected to the end of the main power unit on the outer wall, a forward and reverse motor is arranged on the top surface of the connecting shell, a follower pressure column which extends into the connecting shell and penetrates the connecting shell at the bottom is sleeved on the end of the forward and reverse motor, when the pressing height needs to be adjusted, the rotation angle of the forward and reverse motor is changed, and at this time, the pressing height of the follower pressure column can be synchronously increased or decreased.

Description

Technical Field

[0001] The utility model relates to the technical field of textile machinery, in particular to a sewing machine which is convenient for adjusting the height of a middle presser foot. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to sew on the sewing material, forming one or more stitches and sewing one or more layers of sewing material together. Sewing machines are divided into manual sewing machines and automatic sewing machines. Most of the sewing machines used in textile factories are automatic sewing machines. They can automatically sew the sewing materials placed on the module through program control. The sewing speed is fast, the effect is good, and the scrap rate is low.

[0003] The middle presser foot follower is a component set on the sewing part of the sewing machine. The middle presser foot follower plays an important role in sewing. It can ensure that the size of the upper thread loop is normal, the shuttle hook thread is stable, and can solve the sewing quality problems caused by skipped stitches or flying threads. The existing middle presser foot follower adopts an eccentric wheel structure, which has a simple structure, is easy to install and has a good pressing effect. It is widely used in various automatic or manual sewing machines.

[0004] Although the above-mentioned prior art can solve the corresponding technical problems, it still has certain defects: the existing presser foot follower is driven by an eccentric wheel structure, and thus when sewing multiple batches of sewing materials with different levels, the height of the presser foot follower cannot be adjusted. Furthermore, when sewing sewing materials laid too high or too low, it is easy to cause excessive force to be applied to the surface of the sewing material, resulting in cracking or failure to effectively compact the sewing material. The limitation is large, and the height of the module of the automatic sewing machine needs to be adjusted. The adjustment process is very cumbersome, and too many adjustment steps are very inconvenient to use. Utility Model Content

[0005] The utility model aims to provide a sewing machine which is convenient for adjusting the height of the middle presser foot and has strong applicability in view of the defects and shortcomings of the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sewing machine that is easy to adjust the height of the middle presser foot, including a processing table and a power main unit arranged on the processing table, a sewing head is provided at the upper end of the power main unit, the sewing head includes a connecting shell fixedly connected to the end surface of the power main unit and a sewing needle column whose outer wall is connected to the end of the power main unit, a forward and reverse motor is provided on the top surface of the connecting shell, and a follower pressure column extending into the connecting shell and penetrating the connecting shell at the bottom is provided on the end of the forward and reverse motor. When the pressing height needs to be adjusted, the rotation angle of the forward and reverse motor is changed, and at this time, the pressing height of the follower pressure column can be synchronously increased or decreased.

[0007] A further improvement is that a flattening mechanism is also provided at the bottom of the connecting shell.

[0008] A further improvement is that the follower pressure column includes a lower pressure plate with one end sleeved on the end of the forward and reverse motor and a conductive column movably engaged with the other end of the lower pressure plate and extending into the connecting shell, and a compacting column penetrating the connecting shell is provided at the bottom of the conductive column.

[0009] A further improvement is that an inwardly-retracted block extending into the connecting shell is provided between the conductive column and the compacting column.

[0010] A further improvement is that: a square connector is provided at the bottom of the compaction column, and a threaded hole is provided on the square connector.

[0011] After adopting the above technical scheme, the beneficial effect of the utility model is as follows: the utility model cooperates with the follow-up pressure column to produce the downward pressure effect through the forward and reverse motors. When a higher downward pressure height is required, the rotation angle of the forward and reverse motors is reduced. When a lower downward pressure height is required, the rotation angle of the forward and reverse motors is increased. In this way, the follow-up height change of the compaction column is realized to adapt to the sewing materials set at different heights. There is no need to adjust the height of the moving module of the automatic sewing machine, and a large number of complicated steps of changing the module height are omitted. The utility model has strong applicability and is simpler and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the sewing machine of the utility model;

[0014] Figure 2 It is a three-dimensional structural schematic diagram of the sewing head of the utility model;

[0015] Figure 3 This is a structural schematic diagram of the utility model sewing head

[0016] Figure 4 It is a three-dimensional structural schematic diagram of the utility model with a follow-up pressure column cooperating with a forward and reverse motor. DETAILED DESCRIPTION

[0017] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0018] See also Figure 1-4As shown, the technical solution adopted in this specific embodiment is: a sewing machine that is convenient for adjusting the height of the middle presser foot, comprising a processing table 1 and a power main unit 2 arranged on the processing table 1, a sewing head 3 is arranged at the upper end of the power main unit 2, the sewing head 3 comprises a connecting shell 31 fixedly connected to the end surface of the power main unit 2 and a sewing needle column 34 connected to the end of the power main unit 2 on the outer wall, a forward and reverse motor 32 is arranged on the top surface of the connecting shell 31, a follower pressure column 33 extending into the connecting shell 31 and penetrating the connecting shell 31 at the bottom is provided on the end of the forward and reverse motor 32, the follower pressure column 33 comprises a lower pressing plate 41 at one end which is sleeved on the end of the forward and reverse motor 32 and a conducting column 42 which is movably engaged and arranged at the other end of the lower pressing plate 41 and extends into the connecting shell 31, a compacting column 44 penetrating the connecting shell 31 is provided at the bottom of the conducting column 42, when it is necessary to adjust the pressing height, the rotation angle of the forward and reverse motor 32 is changed, and at this time, the pressing height of the follower pressure column 33 can be synchronously increased or decreased, and when in use, the sewing machine is placed The present invention is placed on a flat plate with a module, and then the module is moved to drive the sewing material to enter the processing table 1, and the suture is fixed on the sewing needle column 34 at the same time. The power host 2 outputs power to the sewing head 3, so that the sewing needle column 34 of the sewing head 3 moves up and down repeatedly to sew the sewing material. At the same time, the forward and reverse motor 32 outputs power to drive the lower pressing plate 41 to produce repeated angle changes, thereby driving the conductive column 42 to move downward, so that the compacting column 44 cooperates with the movement of the sewing needle column 34 to move up and down synchronously, and then the sewing material is compacted and fixed during sewing. When a higher pressing height is required, the rotation angle of the forward and reverse motor 32 is adjusted to reduce the rotation angle. When a lower pressing height is required, the rotation angle of the forward and reverse motor 32 is adjusted to increase the rotation angle, thereby realizing the follow-up height increase or decrease of the compacting column 44 to adapt to sewing materials set at different heights. There is no need to adjust the height of the moving module of the automatic sewing machine, and a large number of complicated steps of changing the module height are omitted. The applicability is strong, and the use and operation are simpler and more convenient;

[0019] A flattening mechanism 4 is also provided at the bottom of the connecting shell 31, which is conducive to further flattening the sewing material during sewing to achieve a higher flatness;

[0020] An inner retracting block 43 extending into the connecting shell 31 is further provided between the conducting column 42 and the compacting column 44, which is conducive to pressing the compacting column 44 into the connecting shell 31 without affecting the moving track of the compacting column 44, so that the entire sewing head 3 can be more miniaturized;

[0021] The bottom of the compaction column 44 is provided with a square connector, and the square connector is provided with a threaded hole, and additional accessories with different functions such as a flat plate can be connected to the bottom of the compaction column 44, so that the compaction column 44 can obtain additional functions such as a larger compaction area.

[0022] Working principle of the utility model: When the utility model is used, the sewing machine is placed on a flat plate with a module group, and then the module group is moved to drive the sewing material to enter the processing table 1, and the suture is fixed on the sewing needle column 34, and the power host 2 outputs power to the sewing head 3, so that the sewing needle column 34 of the sewing head 3 moves up and down repeatedly to sew the sewing material, and at the same time, the forward and reverse motor 32 outputs power to drive the lower pressing plate 41 to produce repeated angle changes, thereby driving the conductive column 42 to move downward, so that the compacting column 44 cooperates with the movement of the sewing needle column 34 When a higher pressing height is required, the rotation angle of the forward and reverse motor 32 is adjusted to reduce the rotation angle. When a lower pressing height is required, the rotation angle of the forward and reverse motor 32 is adjusted to increase the rotation angle. In this way, the height of the compacting column 44 can be increased or decreased to adapt to the sewing materials set at different heights. There is no need to adjust the height of the moving module of the automatic sewing machine, and a large number of complicated steps for changing the module height are omitted. The machine has strong applicability and is simpler and more convenient to use.

[0023] The utility model is intended to protect the structure of the product. The model of each component is not the content of the utility model, and it is also a known technology. Any component on the market that can achieve the above functions of the utility model can be used as a choice. Therefore, the model and other parameters of the component are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of various components.

[0024] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.

Claims

1. A sewing machine that facilitates adjusting the height of a middle presser foot, comprising a processing table (1) and a main power unit (2) disposed on the processing table (1), wherein a sewing head (3) is disposed at the upper end of the main power unit (2), and the sewing head (3) comprises a connecting shell (31) fixedly connected to the end surface of the main power unit (2) and a sewing needle column (34) whose outer wall is connected to the end of the main power unit (2), characterized in that: A forward and reverse motor (32) is disposed on the top surface of the connecting shell (31), and a follower pressure column (33) is sleeved on the end of the forward and reverse motor (32) and extends into the connecting shell (31) and penetrates the connecting shell (31) at the bottom. When the pressing height needs to be adjusted, the rotation angle of the forward and reverse motor (32) is changed, and at this time, the pressing height of the follower pressure column (33) can be synchronously increased or decreased.

2. A sewing machine with a convenient height adjustment for the middle presser foot according to claim 1, characterized in that: A flattening mechanism (4) is also provided at the bottom of the connecting shell (31).

3. A sewing machine with a convenient adjustment of the height of the middle presser foot according to claim 1, characterized in that: The follower pressure column (33) comprises a lower pressure plate (41) with one end sleeved on the end of the forward and reverse motor (32) and a conducting column (42) movably engaged with the other end of the lower pressure plate (41) and extending into the connecting shell (31), wherein a compacting column (44) penetrating the connecting shell (31) is provided at the bottom of the conducting column (42).

4. A sewing machine with a convenient height adjustment for the middle presser foot according to claim 3, characterized in that: An inwardly retracted block (43) extending into the connecting shell (31) is also provided between the conducting column (42) and the compacting column (44).

5. A sewing machine with a convenient height adjustment for the middle presser foot according to claim 3, characterized in that: A square connector is provided at the bottom of the compacting column (44), and a threaded hole is provided on the square connector.

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