Upper tooth frame assembly of sewing machine, machine head device and sewing machine

Abstract

The utility model relates to an upper tooth frame assembly of a sewing machine, a machine head device and the sewing machine, the upper tooth frame assembly of the sewing machine comprises an upper tooth frame, a first upper tooth frame shaft structure, a second upper tooth frame shaft structure and an upper seam distance adjusting structure, the two ends of the upper tooth frame are matched with the first upper tooth frame shaft structure and the second upper tooth frame shaft structure respectively, and the upper seam distance adjusting structure is matched with the first upper tooth frame shaft structure and the second upper tooth frame shaft structure. The upper seam distance adjusting structure is connected with the first upper tooth frame shaft structure, and the first upper tooth frame shaft structure and the second upper tooth frame shaft structure are both connected with the machine needle transmission shaft structure and located on the two sides of the machine needle transmission shaft structure. 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] This application relates to the technical field of sewing machines, and more specifically, to an upper tooth frame assembly, a head device, and a sewing machine of a sewing machine. 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, quilting machines, etc.

[0003] The sewing machine needs to cooperate with the reciprocating movements of the sewing needle and the rotary hook to perform sewing. During the sewing process of the sewing machine, the tooth frame assembly needs to feed the material.

[0004] In some existing technologies, the tooth frame assembly is arranged at the lower part of the machine table, and an avoidance part is opened on the machine table. The to-be-sewn fabric is moved by the tooth frame assembly. However, under the push of the tooth frame assembly, for some to-be-sewn fabrics, the lower layer of the fabric is pushed at a faster speed, while the upper layer of the fabric moves slower, resulting in inconsistent movement paces of the upper layer and the lower layer of the fabric, and causing unqualified sewing. Summary of the Utility Model

[0005] This application provides an upper tooth frame assembly, a head device, and a sewing machine of a sewing machine to solve the problem that the conveying paces of the upper to-be-sewn object and the lower to-be-sewn object are inconsistent when the existing sewing machine performs sewing.

[0006] An upper tooth frame assembly of a sewing machine according to this application includes: an upper tooth frame, a first upper tooth frame shaft structure, a second upper tooth frame shaft structure, and an upper stitch pitch adjustment structure. The two ends of the upper tooth frame are respectively matched with the first upper tooth frame shaft structure and the second upper tooth frame shaft structure. The upper stitch pitch adjustment structure is connected to the first upper tooth frame shaft structure. Both the first upper tooth frame shaft structure and the second upper tooth frame shaft structure are connected to the sewing needle transmission shaft structure and are located on both sides of the sewing needle transmission shaft structure.

[0007] Further, the upper tooth frame assembly further includes a first upper tooth frame shaft transmission structure and an upper tooth frame cam structure. The upper tooth frame cam structure is arranged on the sewing needle transmission shaft structure. The first end of the first upper tooth frame shaft transmission structure is sleeved on the upper tooth frame cam structure, and the second end of the first upper tooth frame shaft structure is rotatably connected to the first upper tooth frame shaft structure.

[0008] Further, 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 sleeved on the circumferential outer side of the upper rack shaft cam structure. The second end of the first transmission rod is rotatably connected to both 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. The second end of the third transmission rod is rotatably connected to the first support.

[0009] Further, the upper rack assembly further includes a second upper rack transmission structure. The first end of the second upper rack transmission structure is rotatably connected to the upper rack cam structure. The second end of the second upper rack transmission structure is rotatably connected to the second upper rack shaft structure.

[0010] Further, the second upper rack transmission structure includes a fourth transmission rod and a second fastener. The first end of the fourth transmission rod is rotatably connected to the upper rack cam structure. The second fastener is fixed on the second upper rack shaft structure. The second end of the fourth transmission rod is rotatably connected to the second fastener.

[0011] Further, the first upper rack shaft structure includes a first upper rack shaft and a third fastener. The second upper rack shaft structure includes a second upper rack shaft and a fourth fastener. The third fastener is arranged on the first upper rack shaft. The first end of the upper rack is rotatably connected to the third fastener. The fourth fastener is arranged on the second upper rack shaft. The second end of the upper rack is movably connected to the fourth fastener.

[0012] Further, the upper stitch distance adjustment structure includes an upper stitch distance adjustment motor, a fifth transmission rod, a sixth transmission rod, and a seventh transmission rod. The output end of the upper stitch distance 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. The second end of the seventh transmission rod is connected to the first upper rack shaft structure.

[0013] According to another aspect of the present application, a head device is further provided. The head device includes a needle assembly and an upper rack assembly. The needle assembly includes a needle motor, a needle transmission shaft structure, a needle crankshaft structure, and a needle bar structure. The output end of the needle motor is connected to the needle transmission shaft structure. The needle crankshaft structure is connected to the needle transmission shaft structure. The needle bar structure is connected to the needle crankshaft structure. The upper rack assembly is connected to the needle transmission shaft structure. The upper rack assembly is the above-mentioned upper rack assembly.

[0014] According to another aspect of the present application, a sewing machine is further provided. The sewing machine includes a head device and a rotary hook device that cooperates with the head device. The head device is the above-mentioned head device.

[0015] Further, the rotating hook device includes a rotating hook motor. The needle motor is located on the upper side of the machine table of the sewing machine, and the rotating hook motor is located on the lower side of the machine table.

[0016] Applying the technical solution of the present application, by setting the upper tooth rack assembly, the upper tooth rack assembly and the lower tooth rack assembly can cooperate to move the object to be sewn. The upper tooth rack assembly and the lower tooth rack assembly jointly clamp and move the object to be sewn up and down, so that when the object to be sewn moves, the upper layer and the lower layer of the object to be sewn are more consistent in pace. The two ends of the upper tooth rack are respectively matched with the first upper tooth rack shaft structure and the second upper tooth rack shaft structure, so that the operation of the upper tooth rack is stable, the force for clamping the object to be sewn is large, and the accuracy of moving the object to be sewn is relatively high. In addition, the upper stitch pitch adjustment structure can also adjust the distance between adjacent sewing needles as needed, which can greatly improve the sewing quality. The technical solution of the present application effectively solves the problem that the conveying paces of the upper object to be sewn and the lower object to be sewn are inconsistent when the sewing machine in the prior art is sewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 The three-dimensional structure diagram of the upper tooth rack assembly according to the embodiment of the present application is shown;

[0020] Figure 2 Shown is Figure 1 The schematic diagram of the first upper tooth rack shaft transmission structure of the upper tooth rack assembly of

[0021] Figure 3 Shown is Figure 1 The schematic diagram of the upper stitch pitch adjustment structure of the upper tooth rack assembly of

[0022] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0023] 10. Upper tooth frame; 20. First upper tooth frame shaft structure; 30. Second upper tooth frame shaft structure; 40. Upper stitch distance adjustment structure; 41. Upper stitch distance adjustment motor; 42. Fifth transmission rod; 43. Sixth transmission rod; 44. Seventh transmission rod; 50. First upper tooth frame shaft transmission structure; 51. First transmission rod; 52. Second transmission rod; 53. Third transmission rod; 54. First support; 55. First fastener; 60. Upper tooth frame cam structure; 70. Second upper tooth frame transmission structure. Detailed implementation manners

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may 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.

[0025] It should be pointed out that the following detailed description is exemplary and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0026] For the sake of description, spatial relative terms, such as "above...", "over...", "on the upper surface of...", "above", etc., may be used herein to describe the spatial positional relationship of one device or feature shown in the drawings with other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation shown in the drawings of the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." may include both orientations of "above..." and "below...". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and corresponding interpretations will be made to the spatial relative descriptions used herein.

[0027] As Figures 1 to 3 shown, the upper tooth frame assembly of the sewing machine in this embodiment includes: an upper tooth frame 10, a first upper tooth frame shaft structure 20, a second upper tooth frame shaft structure 30, and an upper stitch distance adjustment structure 40. Both ends of the upper tooth frame 10 are respectively matched with the first upper tooth frame shaft structure 20 and the second upper tooth frame shaft structure 30. The upper stitch distance adjustment structure 40 is connected to the first upper tooth frame shaft structure 20. Both the first upper tooth frame shaft structure 20 and the second upper tooth frame shaft structure 30 are connected to the sewing needle transmission shaft structure and are located on both sides of the sewing needle transmission shaft structure.

[0028] Applying the technical solution of this embodiment, by setting the upper tooth frame assembly, the upper tooth frame assembly and the lower tooth frame assembly can cooperate to move the object to be sewn. The upper tooth frame assembly and the lower tooth frame assembly jointly clamp and move the object to be sewn up and down, so that when the object to be sewn is moving, the upper layer and the lower layer of the object to be sewn are more consistent in pace. The two ends of the upper tooth frame 10 are respectively matched with the first upper tooth frame shaft structure 20 and the second upper tooth frame shaft structure 30, so that the operation of the upper tooth frame 10 is stable, the force for clamping the object to be sewn is large, and the accuracy of moving the object to be sewn is relatively high. In addition, the upper stitch pitch adjustment structure 40 can also adjust the distance between adjacent sewing needles according to needs, which can greatly improve the sewing quality. The technical solution of this embodiment effectively solves the problem that in the existing sewing machine during sewing, the conveying paces of the upper object to be sewn and the lower object to be sewn are inconsistent.

[0029] It should be noted that the first upper tooth frame shaft of the first upper tooth frame shaft structure 20 and the second upper tooth frame shaft of the second upper tooth frame shaft structure 30 are symmetrically arranged on both sides of the needle driving shaft structure, so that the applied force is more balanced.

[0030] As Figure 1 shown, in the technical solution of this embodiment, the upper tooth frame assembly further includes a first upper tooth frame shaft transmission structure 50 and an upper tooth frame cam structure 60. The upper tooth frame cam structure 60 is arranged on the needle driving shaft structure. The first end of the first upper tooth frame shaft transmission structure 50 is sleeved on the upper tooth frame cam structure 60, and the second end of the first upper tooth frame shaft structure 20 is rotatably connected to the first upper tooth frame shaft structure 20. The above structure is compact and convenient to operate. It should be noted that the upper tooth frame cam structure 60 includes a cam section. The needle driving shaft structure passes through the center of the cam section. The distance from the circumferential outer wall of the cam section to the central axis of the needle driving shaft structure is different, so that the rotation of the needle driving shaft structure can be converted into the swing of the first upper tooth frame shaft structure 20. The second upper tooth frame shaft transmission structure cooperates with the non-cam section of the upper tooth frame cam structure 60.

[0031] As Figure 2As shown in the figure, in the technical solution of this embodiment, the first upper tooth frame shaft transmission structure 50 includes a first transmission rod 51, a second transmission rod 52, a third transmission rod 53, a first support 54, and a first fastener 55. The first end of the first transmission rod 51 is rotatably sleeved on the circumferential outer side of the upper tooth frame shaft cam structure. The second end of the first transmission rod 51 is rotatably connected to both the first end of the second transmission rod 52 and the first end of the third transmission rod 53. The second end of the second transmission rod 52 is rotatably connected to the first fastener 55. The first fastener 55 is arranged on the first upper tooth frame shaft structure 20. The second end of the third transmission rod 53 is rotatably connected to the first support 54. Since the structure of the sewing machine is relatively compact, through the transmission arrangement of the first transmission rod 51, the second transmission rod 52, the third transmission rod 53, the first support 54, and the first fastener 55, it can be ensured that the first upper tooth frame shaft transmission structure 50 can avoid other structures and prevent interference. The cooperation between the first support 54 and the third transmission rod 53 makes the transmission of the first upper tooth frame shaft transmission structure 50 more stable.

[0032] As Figure 1 and Figure 2 shown in the figure, in the technical solution of this embodiment, the upper tooth frame assembly further includes a second upper tooth frame transmission structure 70. The first end of the second upper tooth frame transmission structure 70 is rotatably connected to the upper tooth frame cam structure 60, and the second end of the second upper tooth frame transmission structure 70 is rotatably connected to the second upper tooth frame shaft structure 30. The above structure is arranged compactly. It should be noted that in this embodiment, the first end of the second upper tooth frame transmission structure 70 is a hollow ring sleeved on the non-cam section of the upper tooth frame cam structure 60.

[0033] As Figure 1 shown in the figure, in the technical solution of this embodiment, the second upper tooth frame transmission structure 70 includes a fourth transmission rod and a second fastener. The first end of the fourth transmission rod is rotatably connected to the upper tooth frame cam structure 60. The second fastener is fixed on the second upper tooth frame shaft structure 30. The second end of the fourth transmission rod is rotatably connected to the second fastener. The above structure is arranged flexibly and avoids interference.

[0034] As Figure 1 shown in the figure, in the technical solution of this embodiment, the first upper tooth frame shaft structure 20 includes a first upper tooth frame shaft and a third fastener. The second upper tooth frame shaft structure 30 includes a second upper tooth frame shaft and a fourth fastener. The third fastener is arranged on the first upper tooth frame shaft. The first end of the upper tooth frame 10 is rotatably connected to the third fastener. The fourth fastener is arranged on the second upper tooth frame shaft. The second end of the upper tooth frame is movably connected to the fourth fastener. The above structure not only meets the constraint on the upper tooth frame 10 but also ensures that the tooth frame can perform actions such as clamping and moving the object to be sewn. It should be noted that the fourth fastener has a long notch, and the rotating shaft at the second end of the upper tooth frame 10 is located in the long notch and can rotate and translate relative to the fourth fastener. The above-mentioned long notch can also be a groove.

[0035] As Figure 3 shown, in the technical solution of this embodiment, the upper stitch pitch adjustment structure 40 includes an upper stitch pitch adjustment motor 41, a fifth transmission rod 42, a sixth transmission rod 43, and a seventh transmission rod 44. The output end of the upper stitch pitch adjustment motor 41 is connected to the first end of the fifth transmission rod 42. The second end of the fifth transmission rod 42 is rotatably connected to the first end of the sixth transmission rod 43. The second end of the sixth transmission rod 43 is connected to the first end of the seventh transmission rod 44. The second end of the seventh transmission rod 44 is connected to the first upper tooth frame shaft structure 20. The above structure can realize the automatic adjustment of the stitch pitch. It should be noted that the above upper stitch pitch adjustment structure 40 can also realize the switching of different directions for feeding the object to be sewn. When the distance is closer to the critical plane for switching directions, the sewing pitch is smaller, that is, the sewing is denser; when the distance is farther from the critical plane for switching directions, the sewing pitch is larger, that is, the sewing is sparser.

[0036] The technical solution of this application also provides a head device. The head device includes a needle assembly and an upper tooth frame assembly. The needle assembly includes a needle motor, a needle transmission shaft structure, a needle crankshaft structure, and a needle bar structure. The output end of the needle motor is connected to the needle transmission shaft structure. The needle crankshaft structure is connected to the needle transmission shaft structure. The needle bar structure is connected to the needle crankshaft structure. The upper tooth frame assembly is connected to the needle transmission shaft structure. The upper tooth frame assembly is the above-mentioned upper tooth frame assembly.

[0037] This application also provides a sewing machine. The sewing machine includes a head device and a rotary hook device that cooperates with the head device. The head device is the above-mentioned head device. The rotary hook device includes a rotary hook motor. The needle motor is located on the upper side of the machine table of the sewing machine. The rotary hook motor is located on the lower side of the machine table. Through the independent needle motor of the head device and the independent rotary hook motor of the rotary hook device, the needle transmission shaft structure does not need a long transmission shaft, so the amount of flexural deformation is relatively small, and such a mechanism is relatively accurate.

[0038] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. As used here, 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, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0039] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An upper tooth frame assembly of a sewing machine, characterized in that, Comprising: an upper dental frame (10), a first upper dental frame shaft structure (20), a second upper dental frame shaft structure (30), and an upper seam distance adjusting structure (40), both ends of the upper dental frame (10) are respectively matched with the first upper dental frame shaft structure (20) and the second upper dental frame shaft structure (30), the upper seam distance adjusting structure (40) is connected to the first upper dental frame shaft structure (20), and both the first upper dental frame shaft structure (20) and the second upper dental frame shaft structure (30) are connected to a sewing needle transmission shaft structure and are located on both sides of the sewing needle transmission shaft structure.

2. The upper tooth carrier assembly of the sewing machine according to claim 1, characterized in that, The upper dental frame assembly further includes a first upper dental frame shaft transmission structure (50) and an upper dental frame cam structure (60), the upper dental frame cam structure (60) is arranged on the sewing needle transmission shaft structure, a first end of the first upper dental frame shaft transmission structure (50) is sleeved on the upper dental frame cam structure (60), and a second end of the first upper dental frame shaft structure (20) is rotatably connected to the first upper dental frame shaft structure (20).

3. The upper tooth frame assembly of the sewing machine according to claim 2, characterized in that, The first upper dental frame shaft transmission structure (50) includes a first transmission rod (51), a second transmission rod (52), a third transmission rod (53), a first support (54), and a first fastener (55), a first end of the first transmission rod (51) is rotatably sleeved on the circumferential outer side of the upper dental frame shaft cam structure, a second end of the first transmission rod (51) is rotatably connected to both a first end of the second transmission rod (52) and a first end of the third transmission rod (53), a second end of the second transmission rod (52) is rotatably connected to the first fastener (55), the first fastener (55) is arranged on the first upper dental frame shaft structure (20), and a second end of the third transmission rod (53) is rotatably connected to the first support (54).

4. The upper tooth frame assembly of the sewing machine according to claim 2, characterized in that, The upper dental frame assembly further includes a second upper dental frame transmission structure (70), a first end of the second upper dental frame transmission structure (70) is rotatably connected to the upper dental frame cam structure (60), and a second end of the second upper dental frame transmission structure (70) is rotatably connected to the second upper dental frame shaft structure (30).

5. The upper tooth carrier assembly of the sewing machine according to claim 4, characterized in that The second upper dental frame transmission structure (70) includes a fourth transmission rod and a second fastener, a first end of the fourth transmission rod is rotatably connected to the upper dental frame cam structure (60), the second fastener is fixed on the second upper dental frame shaft structure (30), and a second end of the fourth transmission rod is rotatably connected to the second fastener.

6. The upper tooth carrier assembly of the sewing machine according to claim 1, characterized in that, The first upper dental frame shaft structure (20) includes a first upper dental frame shaft and a third fastener, the second upper dental frame shaft structure (30) includes a second upper dental frame shaft and a fourth fastener, the third fastener is arranged on the first upper dental frame shaft, a first end of the upper dental frame is rotatably connected to the third fastener, the fourth fastener is arranged on the second upper dental frame shaft, and a second end of the upper dental frame is movably connected to the fourth fastener.

7. The upper tooth carrier assembly of the sewing machine according to claim 1, characterized in that, The upper stitch distance adjusting structure (40) includes an upper stitch distance adjusting motor (41), a fifth transmission rod (42), a sixth transmission rod (43), and a seventh transmission rod (44). The output end of the upper stitch distance adjusting motor (41) is connected to the first end of the fifth transmission rod (42). The second end of the fifth transmission rod (42) is rotatably connected to the first end of the sixth transmission rod (43). The second end of the sixth transmission rod (43) is connected to the first end of the seventh transmission rod (44). The second end of the seventh transmission rod (44) is connected to the first upper tooth carrier shaft structure (20).

8. A nose device, characterized in that, The head device includes a needle assembly and an upper tooth carrier assembly. The needle assembly includes a needle motor, a needle transmission shaft structure, a needle crankshaft structure, and a needle bar structure. The output end of the needle motor is connected to the needle transmission shaft structure. The needle crankshaft structure is connected to the needle transmission shaft structure. The needle bar structure is connected to the needle crankshaft structure. The upper tooth carrier assembly is connected to the needle transmission shaft structure. The upper tooth carrier assembly is the upper tooth carrier assembly according to any one of claims 1 to 7.

9. A sewing machine, characterized in that, The sewing machine includes a head device and a rotary hook device that cooperates with the head device. The head device is the head device according to claim 8.

10. The sewing machine according to claim 9, characterized in that, The rotary hook device includes a rotary hook motor. The needle motor is located on the upper side of the machine table of the sewing machine. The rotary hook motor is located on the lower side of the machine table.

Images