Sewing machine and sewing method

Abstract

The invention relates to a sewing machine and a sewing method.The sewing machine comprises a machine head device, the machine head device comprises a machine needle assembly and an upper tooth frame assembly, the machine needle assembly comprises a machine needle driving structure, a machine needle transmission shaft structure and a machine needle structure, the machine needle driving structure is connected with the machine needle transmission shaft structure, and the machine needle structure is connected with the machine needle transmission shaft structure; the upper tooth frame assembly comprises an upper tooth frame, a first upper tooth frame shaft structure and a second upper tooth frame shaft structure. The two ends of the upper tooth frame are connected with the first upper tooth frame shaft structure and the second upper tooth frame shaft structure respectively. The rotating shuttle device comprises a rotating shuttle assembly and a lower tooth frame assembly, and the lower tooth frame assembly is connected with the rotating shuttle assembly; the upper tooth frame assembly and the lower tooth frame assembly are correspondingly arranged. According to the technical scheme, the problem that when a sewing machine in the prior art is used for sewing, the conveying pace of an upper-layer to-be-sewn object and the conveying pace of a lower-side to-be-sewn object are not consistent is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machines, and in particular, to a sewing machine and a sewing method. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. Sewing machines include sewing machines, stitching machines, embroidery machines, and quilting machines.

[0003] The sewing machine requires the reciprocating motion of the needle and the shuttle to work together to sew, and the tooth frame assembly of the sewing machine needs to feed the material during the sewing process.

[0004] In some prior art, the tooth frame assembly is arranged at the bottom of the machine table, and an avoidance portion is provided on the machine table, and the cloth to be sewn is moved by the tooth frame assembly. However, when the cloth to be sewn is pushed by the tooth frame assembly, the lower layer of the cloth is pushed faster, while the upper layer of the cloth moves slower, resulting in inconsistent movement pace of the upper layer of the cloth and the lower layer of the cloth, which causes unqualified sewing. Summary of the invention

[0005] The present application provides a sewing machine and a sewing method to solve the problem that when the sewing machine in the prior art is sewing, the conveying pace of the upper object to be sewn and the lower object to be sewn are inconsistent.

[0006] A sewing machine provided according to the present application includes: a head device, the head device includes a needle assembly and an upper tooth frame assembly, the needle assembly includes a needle drive structure, a needle transmission shaft structure and a needle structure, the needle drive structure is connected to the needle transmission shaft structure, the needle structure is connected to the needle transmission shaft structure, the upper tooth frame assembly includes an upper tooth frame, a first upper tooth frame shaft structure and a second upper tooth frame shaft structure, the two ends of the upper tooth frame are respectively connected to the first upper tooth frame shaft structure and the second upper tooth frame shaft structure; a rotary shuttle device, the rotary shuttle device includes a rotary shuttle assembly and a lower tooth frame assembly, the lower tooth frame assembly is connected to the rotary shuttle assembly; the upper tooth frame assembly and the lower tooth frame assembly are arranged correspondingly.

[0007] Furthermore, the upper rack assembly includes an upper rack cam structure, a first upper rack shaft transmission structure and a second upper rack shaft transmission structure. The upper rack cam structure is arranged on the needle transmission shaft structure. The first end of the first upper rack shaft transmission structure is rotatably mounted on the upper rack cam structure. The second end of the first upper rack shaft transmission structure is connected to the first upper rack shaft structure. The first end of the second upper rack shaft transmission structure is rotatably mounted on the circumferential outer side of the upper rack cam structure. The second end of the second upper rack shaft transmission structure is connected to the second upper rack shaft structure.

[0008] Furthermore, the first upper rack shaft transmission structure includes a first transmission rod, a second transmission rod, a third transmission rod, a first support and a first fastener, the first end of the first transmission rod is rotatably mounted on the circumferential outer side of the upper rack shaft cam structure, the second end of the first transmission rod is rotatably connected to the first end of the second transmission rod and the first end of the third transmission rod, the second end of the second transmission rod is rotatably connected to the first fastener, the first fastener is arranged on the first upper rack shaft structure, and the second end of the third transmission rod is rotatably connected to the first support.

[0009] Furthermore, the upper tooth rack assembly also includes an upper gap adjustment structure, and the upper gap adjustment structure is connected to the first upper tooth rack shaft structure to drive the first upper tooth rack shaft structure to rotate.

[0010] Furthermore, the upper seam adjustment structure includes an upper seam adjustment motor, a fifth transmission rod, a sixth transmission rod and a seventh transmission rod, the output end of the upper seam adjustment motor is connected to the first end of the fifth transmission rod, the second end of the fifth transmission rod is rotatably connected to the first end of the sixth transmission rod, the second end of the sixth transmission rod is connected to the first end of the seventh transmission rod, and the second end of the seventh transmission rod is connected to the first upper rack shaft structure.

[0011] Furthermore, the needle drive structure includes a needle motor, the needle drive shaft structure includes a needle drive shaft, the output end of the needle motor is connected to the needle drive shaft, the shuttle assembly includes a shuttle motor and a shuttle shaft, the shuttle motor and the shuttle shaft are connected, the needle motor is located on the upper side of the sewing machine's table, and the shuttle motor is located on the lower side of the sewing machine's table.

[0012] Furthermore, the rotary hook shaft has a hollow lubricating oil containing space and a lubricating oil communicating channel, the lubricating oil communicating channel communicates the lubricating oil containing space and the outside of the rotary hook shaft, and is arranged corresponding to the spline shaft section of the rotary hook shaft.

[0013] Furthermore, the head device also includes a thread drawing assembly, which includes a thread drawing motor, a thread drawing gear, a thread drawing rack and a thread drawing arm. The thread drawing gear is arranged on the thread drawing motor, the thread drawing rack is vertically arranged and meshed with the thread drawing gear, the thread drawing arm is connected to the thread drawing gear, and a surface thread perforation is arranged on the thread drawing arm.

[0014] Furthermore, the head device also includes a presser foot assembly, which includes a presser foot structure and a presser foot adjustment structure. The presser foot structure can be movably arranged on the casing of the sewing machine up and down. The presser foot adjustment structure includes a presser foot adjustment motor, a presser foot adjustment gear and a presser foot adjustment rack. The presser foot adjustment gear is installed at the output end of the presser foot adjustment motor, the presser foot adjustment gear is meshed with the presser foot adjustment rack, and the presser foot adjustment rack is connected to the presser foot structure.

[0015] According to another aspect of the present application, a sewing method is also provided, which adopts the above-mentioned sewing machine, and the sewing method comprises: the upper tooth frame assembly and the lower tooth frame assembly clamp the object to be sewn and move; after the object to be sewn moves, the upper tooth frame assembly and the lower tooth frame assembly release the object to be sewn; and the machine needle assembly sews the object to be sewn.

[0016] By applying the technical solution of the present application, the upper tooth frame assembly and the lower tooth frame assembly are correspondingly arranged. When the sewing machine is working, the upper tooth frame assembly and the lower tooth frame assembly cooperate to clamp the object to be sewn and move the object to be sewn a certain distance. The machine needle structure continues to sew, and then the upper tooth frame assembly and the lower tooth frame assembly continue to cooperate to clamp the object to be sewn and move the object to be sewn a certain distance. The above actions are repeated over and over again until the sewing is completed. The upper tooth frame assembly and the lower tooth frame assembly clamp and move the object to be sewn together, so that when the object to be sewn moves, the upper layer of the object to be sewn and the lower layer of the object to be sewn are in step. The upper tooth frame is supported and cooperated by the first upper tooth frame shaft structure and the second upper tooth frame shaft structure, and the operation is relatively stable, and the cooperation accuracy with the lower tooth frame assembly is relatively high. The technical solution of the present application effectively solves the problem of inconsistent delivery pace of the upper layer of the object to be sewn and the lower side of the object to be sewn when the sewing machine in the prior art is sewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a sewing machine according to an embodiment of the present application is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the internal structure of a head device of a sewing machine;

[0021] Figure 3 Shows Figure 1 Schematic diagram of the internal structure of a sewing machine;

[0022] Figure 4 Shows Figure 3 A partial enlarged schematic diagram of the internal structure of a sewing machine;

[0023] Figure 5 Shows Figure 3A schematic diagram of the internal structure of the sewing machine from another angle;

[0024] Figure 6 Shows Figure 1 Schematic diagram of the upper seam adjustment structure of a sewing machine.

[0025] The above drawings include the following reference numerals:

[0026] 10. Machine head device; 11. Needle assembly; 12. Upper rack assembly; 121. Upper rack; 122. First upper rack shaft structure; 123. Second upper rack shaft structure; 124. Upper rack cam structure; 125. First upper rack shaft transmission structure; 1251. First transmission rod; 1252. Second transmission rod; 1253. Third transmission rod; 1254. First support; 1255. First fastener; 126. Second upper rack shaft transmission structure; 127. Upper seam adjustment structure; 13. Thread drawing assembly; 14. Presser foot assembly; 20. Rotary shuttle device; 21. Rotary shuttle assembly; 22. Lower rack assembly; 30. Machine table. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0030] like Figures 1 to 6As shown, the sewing machine of this embodiment includes: a head device 10 and a rotary shuttle device 20. The head device 10 includes a needle assembly 11 and an upper tooth frame assembly 12. The needle assembly 11 includes a needle drive structure, a needle transmission shaft structure and a needle structure. The needle drive structure is connected to the needle transmission shaft structure, and the needle structure is connected to the needle transmission shaft structure. The upper tooth frame assembly 12 includes an upper tooth frame 121, a first upper tooth frame shaft structure 122 and a second upper tooth frame shaft structure 123. The two ends of the upper tooth frame 121 are respectively connected to the first upper tooth frame shaft structure 122 and the second upper tooth frame shaft structure 123. The rotary shuttle device 20 includes a rotary shuttle assembly 21 and a lower tooth frame assembly 22. The lower tooth frame assembly 22 is connected to the rotary shuttle assembly 21. The upper tooth frame assembly 12 and the lower tooth frame assembly 22 are arranged correspondingly.

[0031] The technical solution of the present embodiment is applied, and the upper tooth frame assembly 12 and the lower tooth frame assembly 22 are correspondingly arranged. When the sewing machine is working, the upper tooth frame assembly 12 and the lower tooth frame assembly 22 cooperate to clamp the object to be sewn, and move the object to be sewn a certain distance, and the needle structure continues to sew, and then the upper tooth frame assembly 12 and the lower tooth frame assembly 22 continue to cooperate to clamp the object to be sewn, and move the object to be sewn a certain distance, and repeat the above actions over and over again until the sewing is completed. The upper tooth frame assembly 12 and the lower tooth frame assembly 22 clamp and move the object to be sewn together, so that when the object to be sewn moves, the upper layer of the object to be sewn and the lower layer of the object to be sewn are in step. The upper tooth frame 121 is supported and cooperated by the first upper tooth frame shaft structure 122 and the second upper tooth frame shaft structure 123, and the operation is relatively stable, and the cooperation accuracy with the lower tooth frame assembly 22 is relatively high. The technical solution of this embodiment effectively solves the problem in the prior art that the conveying pace of the upper layer of sewing materials and the lower layer of sewing materials are inconsistent when the sewing machine is sewing.

[0032] like Figures 2 to 4As shown, in the technical solution of this embodiment, the upper rack assembly 12 includes an upper rack cam structure 124, a first upper rack shaft transmission structure 125 and a second upper rack shaft transmission structure 126. The upper rack cam structure 124 is arranged on the needle transmission shaft structure. The first end of the first upper rack shaft transmission structure 125 is rotatably sleeved on the upper rack cam structure 124. The second end of the first upper rack shaft transmission structure 125 is connected to the first upper rack shaft structure 122. The first end of the second upper rack shaft transmission structure 126 is rotatably sleeved on the circumferential outer side of the upper rack cam structure 124. The second end of the second upper rack shaft transmission structure 126 is connected to the second upper rack shaft structure 123. The rotation of the upper rack cam structure 124 relative to the first upper rack shaft transmission structure 125 causes the first upper rack shaft transmission structure 125 to drive the first upper rack shaft structure 122 to swing, thereby driving the upper rack 121 to swing. In this embodiment, the first end of the first upper rack shaft transmission structure 125 is sleeved on the cam part of the upper rack shaft cam structure, that is, the sleeve thickness of this part is different, and a smooth and gradual transition is adopted, and the first end of the second upper rack shaft transmission structure 126 is sleeved on the non-cam part of the upper rack shaft cam structure, that is, the sleeve thickness of this part is consistent. As another embodiment, the first end of the first upper rack shaft transmission structure 125 is sleeved on the non-cam part of the upper rack shaft cam structure, that is, the sleeve thickness of this part is the same, and the first end of the second upper rack shaft transmission structure 126 is sleeved on the cam part of the upper rack shaft cam structure, that is, the sleeve thickness of this part is different, and a smooth and gradual transition is adopted. Or the first end of the first upper rack shaft transmission structure 125 and the first end of the second upper rack shaft transmission structure 126 are both sleeved on the cam part of the upper rack shaft cam structure, and the cams of the sleeve parts of the first end of the first upper rack shaft transmission structure 125 and the first end of the second upper rack shaft structure 123 are matched with each other, and the protruding parts are at a matching angle.

[0033] like Figure 4As shown, in the technical solution of this embodiment, the first upper tooth frame shaft transmission structure 125 includes a first transmission rod 1251, a second transmission rod 1252, a third transmission rod 1253, a first support 1254 and a first fastener 1255. The first end of the first transmission rod 1251 is rotatably sleeved on the circumferential outer side of the upper tooth frame shaft cam structure, the second end of the first transmission rod 1251 is rotatably connected to the first end of the second transmission rod 1252 and the first end of the third transmission rod 1253, the second end of the second transmission rod 1252 is rotatably connected to the first fastener 1255, the first fastener 1255 is arranged on the first upper tooth frame shaft structure 122, and the second end of the third transmission rod 1253 is rotatably connected to the first support 1254. The above structure forms a drive for the upper tooth frame 121 through the action and constraint between the transmission rods. The above structure is compact, stable in operation, and has low processing cost. The second upper rack transmission structure includes a fourth transmission rod and a second fastener, the first end of the fourth transmission rod is sleeved on the circumferential outer side of the upper rack shaft cam structure, the second end of the fourth transmission rod is rotatably connected to the second fastener, and the second fastener is arranged on the second upper rack shaft structure 123. It should be noted that the rotation axis of the first fastener 1255 and the second transmission rod 1252 are parallel to the rotation axis of the first upper rack shaft structure 122, and have a predetermined distance. The rotation axis of the second fastener and the fourth transmission rod are parallel to the rotation axis of the second upper rack shaft structure 123, and have a predetermined distance.

[0034] like Figure 6 As shown, in the technical solution of the present embodiment, the upper tooth frame assembly 12 also includes an upper seam adjustment structure 127, and the upper seam adjustment structure 127 is connected to the first upper tooth frame shaft structure 122 to drive the first upper tooth frame shaft structure 122 to rotate. The setting of the upper seam adjustment structure 127 allows the stitch length to be adjusted when the sewing machine sews the object to be sewn. For example, when the distance between adjacent needles is required to be large, or when the distance between adjacent needles is small, it can be adjusted by the upper seam adjustment structure 127. It should be noted that the adjustment of the stitch length requires the upper seam adjustment structure 127 and the lower seam adjustment structure to be adjusted accordingly and set synchronously. The lower seam adjustment structure is similar to the upper seam adjustment structure 127, and only the upper seam adjustment structure 127 is introduced here. In addition, the upper seam adjustment structure 127 drives the first upper tooth frame shaft structure 122 to rotate across the critical surface to achieve the switching of forward and reverse feeding.

[0035] like Figure 6As shown, in the technical solution of this embodiment, the upper seam adjustment structure 127 includes an upper seam adjustment motor, a fifth transmission rod, a sixth transmission rod and a seventh transmission rod, the output end of the upper seam adjustment motor is connected to the first end of the fifth transmission rod, the second end of the fifth transmission rod is rotatably connected to the first end of the sixth transmission rod, the second end of the sixth transmission rod is connected to the first end of the seventh transmission rod, and the second end of the seventh transmission rod is connected to the first upper tooth frame shaft structure 122. Through the cooperation of the above three transmission rods, the setting of the upper seam adjustment structure 127 is more flexible, and the space of the sewing machine is more compact. If the transmission of the above transmission rods is not used, there is no space in the adjacent position of the first upper tooth frame shaft structure 122, and the setting of the upper seam adjustment structure 127 is bound to cause interference. It should be noted that the middle part of the seventh transmission rod is rotatably connected to the second bracket, so that the structure of the upper seam adjustment structure 127 is more stable and the transmission accuracy is higher. The first end of the upper rack is rotatably connected to the first upper rack shaft structure 122, and the second end of the upper rack is both rotatable and movable with the second upper rack shaft structure 123. Specifically, an upper rack fastener is provided on the second upper rack shaft of the second upper rack shaft structure 123, and the upper rack fastener has a long hole. The mounting axis of the second end of the upper rack is located in the long hole, and the extension direction of the long hole is to extend in the direction away from the second upper rack shaft.

[0036] The lower tooth frame assembly 22 includes a lower tooth frame, a first lower tooth frame shaft structure, a second lower tooth frame shaft structure, a lower tooth frame cam structure, a first lower tooth frame shaft transmission structure, a second lower tooth frame shaft transmission structure and a lower gap adjustment structure. The two ends of the lower tooth frame are respectively connected to the first lower tooth frame shaft structure and the second lower tooth frame shaft structure, the two ends of the first lower tooth frame shaft transmission structure are respectively rotatably connected to the lower tooth frame cam structure and the first lower tooth frame shaft structure, and the two ends of the second lower tooth frame shaft transmission structure are respectively rotatably connected to the lower tooth frame cam structure and the second lower tooth frame shaft structure. The first end of the lower tooth frame is rotatably connected to the first lower tooth frame shaft structure, and the second end of the lower tooth frame is connected to the second lower tooth frame shaft structure in a rotatable and movable manner.

[0037] like Figures 2 to 4As shown, in the technical solution of this embodiment, the needle drive structure includes a needle motor, the needle transmission shaft structure includes a needle transmission shaft, the output end of the needle motor is connected to the needle transmission shaft, the shuttle assembly 21 includes a shuttle motor and a shuttle shaft, the shuttle motor and the shuttle shaft are connected, the needle motor is located on the upper side of the machine table 30 of the sewing machine, and the shuttle motor is located on the lower side of the machine table 30 of the sewing machine. The above-mentioned needle motor independently drives the needle transmission shaft, and the shuttle motor independently drives the shuttle shaft, which changes the structure in the prior art that the needle transmission shaft and the shuttle shaft share a motor and are transmitted through a transmission structure. The length of the needle transmission shaft of this embodiment can be set shorter, which makes the sewing machine smaller on the one hand, and the flexural deformation of the needle transmission shaft is smaller on the other hand. It should be noted that the needle motor and the shuttle motor need to be controlled by the control component of the sewing machine so that the needle motor and the shuttle motor rotate synchronously, thereby ensuring the coordination of the needle and the shuttle.

[0038] In the technical solution of the present embodiment, the shuttle assembly 21 also includes a spline sleeve, and the shuttle shaft includes a spline shaft section adapted to the spline sleeve. The provision of the spline sleeve not only satisfies the relative axial movement between the shuttle shaft and the spline sleeve, but also satisfies the rotation of the spline sleeve driven by the shuttle shaft. It is convenient to subsequently set up the lower tooth rack cam structure, drive the lower tooth rack cam structure, etc. The shuttle assembly 21 also includes an axial adjustment motor structure, which drives a screw transmission structure, and the screw transmission structure converts the rotation into a translation, and drives the shuttle shaft to move axially along the shuttle shaft. The transmission of the screw transmission structure is relatively stable, and the moving position is controllable. By moving the shuttle shaft along the axial direction of the shuttle shaft, the position between the shuttle and the needle can be changed (can be close to and away from), which can effectively avoid damaging the needle, adapt to different models of needles, and sew objects of different thicknesses to be sewn. The axial adjustment motor structure includes an axial drive motor, a driving gear, a transmission gear and a driven gear. The driving gear is installed at the output end of the axial drive motor, and the driven gear is installed on the screw transmission structure. The driving gear matches the driven gear through the transmission gear, and the transmission gear is made of non-metallic material. The gear transmission is relatively stable and controllable. The transmission gear is made of non-metallic material, so that the axial adjustment motor structure has less noise when running. The material of the transmission gear can be plastic, rubber, silicone and other materials.

[0039] In the technical solution of this embodiment, the rotary hook shaft has a hollow lubricating oil containing space and a lubricating oil connecting channel. The lubricating oil connecting channel connects the lubricating oil containing space and the outside of the rotary hook shaft, and is arranged corresponding to the spline shaft section of the rotary hook shaft. The inner wall of the spline rotary hook shaft (rotary hook shaft) is an inclined wall surface, and the inner wall of the spline rotary hook shaft corresponding to the lubricating oil connecting channel gradually decreases to the two sides of the spline rotary hook shaft. The above structure makes the position corresponding to the first lubricating oil connecting channel inside the spline rotary hook shaft in a position where lubricating oil is easy to accumulate, so that when the spline rotary hook shaft rotates, the lubricating oil enters the lubricating oil connecting channel under the action of centrifugal force. That is, when the inside of the spline rotary hook shaft is less, the lubrication effect of the rotary hook assembly 21 can still be guaranteed. It should be noted that the inclination angle from the two ends of the spline rotary hook shaft to the corresponding position of the lubricating oil connecting channel is between 0.5° and 3°, and the inner wall of the annular ring corresponding to the lubricating oil connecting channel is at a lower position, and lubricating oil is easy to accumulate at this position. The spline sleeve has a sleeve lubricating oil connecting channel that passes through the side wall of the spline sleeve, and the sleeve lubricating oil connecting channel is arranged corresponding to the lower rack crankshaft (lower rack cam structure). The above-mentioned lubricating oil structure can reduce the friction and wear of the lower rack cam structure. The cross-sectional area of ​​the sleeve lubricating oil connecting channel is larger than the cross-sectional area of ​​the lubricating oil connecting channel. The above-mentioned structure is conducive to the lubricating oil passing through the sleeve lubricating oil connecting channel and the lubricating oil connecting channel. It should be noted that the cross-sectional area of ​​the lubricating oil connecting channel is circular, the sleeve lubricating oil connecting channel extends along the circumference of the spline sleeve, and the width of the sleeve lubricating oil connecting channel is larger than the diameter of the lubricating oil connecting channel. The sleeve lubricating oil connecting channel extends along the circumference of the spline sleeve, so that the lubricating oil has a wider range of circumferential lubrication, and the width of the sleeve lubricating oil connecting channel is greater than the diameter of the lubricating oil connecting channel. In this way, when the spline rotary hook shaft moves axially, the lubricating oil connecting channel and the sleeve lubricating oil connecting channel are always in a connected state, that is, the lubricating oil can flow to the part that needs lubrication through the lubricating oil connecting channel and the sleeve lubricating oil connecting channel.

[0040] like Figure 1 As shown, in the technical solution of this embodiment, the head device 10 also includes a thread drawing assembly 13, which includes a thread drawing motor, a thread drawing gear, a thread drawing rack and a thread drawing arm. The thread drawing gear is arranged on the thread drawing motor, the thread drawing rack is arranged vertically and meshes with the thread drawing gear, the thread drawing arm is connected to the thread drawing gear, and the thread drawing arm is provided with a surface thread perforation. The thread drawing assembly 13 is used to draw back a part of the thread ends on the sewing object, and the above structure can effectively play the role of preventing bird nests.

[0041] like Figures 1 to 4As shown, in the technical scheme of the present embodiment, the head device 10 also includes a presser foot assembly 14, the presser foot assembly 14 includes a presser foot structure and a presser foot adjustment structure, the presser foot structure can be arranged on the casing of the sewing machine in an upward and downward manner, the presser foot adjustment structure includes a presser foot adjustment motor, a presser foot adjustment gear and a presser foot adjustment rack, the presser foot adjustment gear is installed at the output end of the presser foot adjustment motor, the presser foot adjustment gear is meshed with the presser foot adjustment rack, and the presser foot adjustment rack is connected to the presser foot structure. The setting of the presser foot adjustment structure enables the adjustment of the height of the presser foot to be automatically controlled, and such a control method has high efficiency and high automation. It should be noted that the presser foot assembly 14 can also control the electrical connection of the assembly, when the upper tooth frame assembly 12 and the lower tooth frame assembly 22 are needed to clamp and move the object to be sewn, the presser foot assembly 14 releases the object to be sewn, and when the machine needle is needed to sew the object to be sewn, the presser foot assembly 14 immediately presses the object to be sewn, which cannot be done manually, and the sewing machine of the present embodiment greatly improves the automation.

[0042] According to another aspect of the present application, a sewing method is also provided, and the sewing method uses the above-mentioned sewing machine. The sewing method comprises: S10, the upper tooth frame assembly 12 and the lower tooth frame assembly 22 clamp the object to be sewn and move; S20, after the object to be sewn moves, the upper tooth frame assembly 12 and the lower tooth frame assembly 22 release the object to be sewn; S30, the machine needle assembly 11 sews the object to be sewn. Before step S10, it also includes a thread drawing assembly 13 drawing the thread, which can effectively prevent bird nests.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sewing machine, characterized in that: include: A machine head device (10), the machine head device (10) comprising a machine needle assembly (11) and an upper tooth frame assembly (12), the machine needle assembly (11) comprising a machine needle drive structure, a machine needle transmission shaft structure and a machine needle structure, the machine needle drive structure is connected to the machine needle transmission shaft structure, the machine needle structure is connected to the machine needle transmission shaft structure, the upper tooth frame assembly (12) comprises an upper tooth frame (121), a first upper tooth frame shaft structure (122) and a second upper tooth frame shaft structure (123), the two ends of the upper tooth frame (121) are respectively connected to the first upper tooth frame shaft structure (122) and the second upper tooth frame shaft structure (123); A rotary shuttle device (20), the rotary shuttle device (20) comprising a rotary shuttle assembly (21) and a lower tooth rack assembly (22), the lower tooth rack assembly (22) being connected to the rotary shuttle assembly (21); The upper dental frame component (12) and the lower dental frame component (22) are arranged correspondingly.

2. The sewing machine according to claim 1, characterized in that: The upper tooth frame assembly (12) includes an upper tooth frame cam structure (124), a first upper tooth frame shaft transmission structure (125) and a second upper tooth frame shaft transmission structure (126); the upper tooth frame cam structure (124) is arranged on the needle transmission shaft structure; the first end of the first upper tooth frame shaft transmission structure (125) is rotatably mounted on the upper tooth frame cam structure (124); the second end of the first upper tooth frame shaft transmission structure (125) is connected to the first upper tooth frame shaft structure (122); the first end of the second upper tooth frame shaft transmission structure (126) is rotatably mounted on the circumferential outer side of the upper tooth frame cam structure (124); and the second end of the second upper tooth frame shaft transmission structure (126) is connected to the second upper tooth frame shaft structure (123).

3. The sewing machine according to claim 1, characterized in that: The first upper tooth rack shaft transmission structure (125) comprises a first transmission rod (1251), a second transmission rod (1252), a third transmission rod (1253), a first support (1254) and a first fastener (1255); the first end of the first transmission rod (1251) is rotatably sleeved on the circumferential outer side of the upper tooth rack shaft cam structure; the second end of the first transmission rod (1251) is rotatably connected to the first end of the second transmission rod (1252) and the first end of the third transmission rod (1253); the second end of the second transmission rod (1252) is rotatably connected to the first fastener (1255); the first fastener (1255) is arranged on the first upper tooth rack shaft structure (122); the second end of the third transmission rod (1253) is rotatably connected to the first support (1254).

4. The sewing machine according to claim 1, characterized in that: The upper tooth frame assembly (12) further comprises an upper gap adjustment structure (127), wherein the upper gap adjustment structure (127) is connected to the first upper tooth frame shaft structure (122) to drive the first upper tooth frame shaft structure (122) to rotate.

5. The sewing machine according to claim 4, characterized in that: The upper seam adjustment structure (127) comprises an upper seam adjustment motor, a fifth transmission rod, a sixth transmission rod and a seventh transmission rod, wherein the output end of the upper seam adjustment motor is connected to the first end of the fifth transmission rod, the second end of the fifth transmission rod is rotatably connected to the first end of the sixth transmission rod, the second end of the sixth transmission rod is connected to the first end of the seventh transmission rod, and the second end of the seventh transmission rod is connected to the first upper tooth rack shaft structure (122).

6. The sewing machine according to any one of claims 1 to 5, characterized in that: The needle drive structure includes a needle motor, the needle transmission shaft structure includes a needle transmission shaft, the output end of the needle motor is connected to the needle transmission shaft, the shuttle assembly (21) includes a shuttle motor and a shuttle shaft, the shuttle motor is connected to the shuttle shaft, the needle motor is located on the upper side of the sewing machine table (30), and the shuttle motor is located on the lower side of the sewing machine table (30).

7. The sewing machine according to claim 6, characterized in that The rotary hook shaft has a hollow lubricating oil containing space and a lubricating oil communicating passage. The lubricating oil communicating passage communicates the lubricating oil containing space and the outside of the rotary hook shaft and is arranged corresponding to the spline shaft section of the rotary hook shaft.

8. The sewing machine according to claim 6, characterized in that The head device (10) also includes a thread drawing assembly (13), which includes a thread drawing motor, a thread drawing gear, a thread drawing rack and a thread drawing arm. The thread drawing gear is arranged on the thread drawing motor, the thread drawing rack is vertically arranged and meshed with the thread drawing gear, the thread drawing arm is connected to the thread drawing gear, and a surface thread perforation is arranged on the thread drawing arm.

9. The sewing machine according to claim 6, characterized in that: The head device (10) also includes a presser foot assembly (14), the presser foot assembly (14) includes a presser foot structure and a presser foot adjustment structure, the presser foot structure is movably arranged on the housing of the sewing machine, the presser foot adjustment structure includes a presser foot adjustment motor, a presser foot adjustment gear and a presser foot adjustment rack, the presser foot adjustment gear is installed at the output end of the presser foot adjustment motor, the presser foot adjustment gear is meshed with the presser foot adjustment rack, and the presser foot adjustment rack is connected to the presser foot structure.

10. A sewing method, characterized in that: The sewing method adopts the sewing machine according to any one of claims 1 to 9, and the sewing method comprises: The upper tooth frame assembly (12) and the lower tooth frame assembly (22) clamp the object to be sewn and move; After the sewing object is moved, the upper tooth frame assembly (12) and the lower tooth frame assembly (22) release the sewing object; The needle assembly (11) sews the object to be sewn.

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