Rotating shuttle assembly and rotating shuttle branching mechanism thereof

Abstract

The utility model discloses a rotating shuttle assembly and a rotating shuttle wire separating mechanism thereof, and relates to the technical field of rotating shuttle structures. A rotating shuttle shaft; the rotating shuttle comprises a shuttle shell and a shuttle core arranged in the shuttle shell, and the rotating shuttle is connected with the rotating shuttle shaft; the branching rod shaft penetrates through the shuttle frame and is parallel to the rotating shuttle shaft; one end of the rotating crank is arranged on the branching rod shaft in a sleeving manner, and the other end of the rotating crank is provided with a roller; the cam is arranged on the rotating shuttle shaft in a sleeving manner, the peripheral surface of the cam is attached to the roller, and the cam and the roller are in rolling fit; the thread separating sheet is connected with the thread separating rod shaft, and the thread separating sheet is used for rotating along with the thread separating rod shaft so as to adjust the gap between the thread separating sheet and the bobbin case. Under the working condition of high-frequency branching, the branching mechanism is stable and reliable in structure, compact and easy to assemble, the noise generated by the branching mechanism is low, and the abrasion degree of parts is low.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary hook structures, and more specifically, to a rotary hook thread-dividing mechanism. In addition, it also relates to a rotary hook assembly including the rotary hook thread-dividing mechanism. Background Art

[0002] In the prior art, during sewing machine operation, after the rotary hook hooks the thread, the thread-splitting mechanism must move the bobbin case, creating a gap between the original contact point between the rotary hook and the needle plate to ensure the upper thread passes through this position. Furthermore, during the subsequent movement of the upper thread, the thread-splitting mechanism must also separate from the bobbin case to allow the subsequent upper thread to pass through this position to ensure the formation of the stitch. This is particularly true in column-type compound feed machines, where the entire column structure is relatively confined, with the rotary hook shaft being the only drive shaft. Therefore, a compact thread-splitting mechanism, driven by the rotary hook shaft, is required to achieve thread splitting.

[0003] The commonly used line dividing mechanism adopts cam transmission and uses connecting rod to swing. The structure is as follows Figure 1 As shown, the thread distributor moves the bobbin case. The cam and swing lever contact each other via a cylindrical roller. However, the swing lever's swing causes the roller to tilt, resulting in unilateral contact between the roller and the cam. This roller's tilt constantly changes, and the direction of the force applied also tilts due to the swing lever's varying swing angle. Prolonged force and contact transmission tilt can lead to increased wear and noise.

[0004] In summary, how to ensure that the branching mechanism is stable and reliable, compact and easy to assemble, and that the noise generated by the branching mechanism and the degree of parts wear are low under high-frequency branching conditions is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a rotary hook line splitting mechanism, which can ensure that the structure of the line splitting mechanism is stable and reliable, compact and easy to assemble under high-frequency line splitting conditions, and that the line splitting mechanism generates low noise and low wear on parts.

[0006] Another object of the present utility model is to provide a rotary hook assembly including the rotary hook thread dividing mechanism.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A rotary hook thread dividing mechanism, comprising:

[0009] shuttle rack;

[0010] Hook shaft;

[0011] A rotary hook comprising a bobbin case and a bobbin core disposed in the bobbin case, wherein the rotary hook is connected to the rotary hook shaft;

[0012] A line dividing rod shaft, which passes through the shuttle frame and is arranged parallel to the rotary shuttle shaft;

[0013] A rotating crank, one end of which is sleeved on the branch rod shaft, and the other end of the rotating crank is provided with a roller;

[0014] A cam is sleeved on the rotary hook shaft, wherein the outer peripheral surface of the cam is in contact with the roller, and the two are in rolling cooperation;

[0015] The line dividing piece is connected to the line dividing rod shaft, and the line dividing piece is used to rotate along with the line dividing rod shaft to adjust the gap between the line dividing piece and the bobbin case.

[0016] In one embodiment, the rotating crank includes a connecting rod, a connecting portion sleeved on the branch rod shaft, and the roller provided at one end of the connecting rod, and the connecting portion is provided at the other end of the connecting rod.

[0017] In one embodiment, the connecting rod and the roller are riveted together.

[0018] In one embodiment, the shuttle frame is provided with a torsion spring hole, the rotating crank sleeve is provided with a torsion spring, and the other elastic end of the torsion spring is fixed in the torsion spring.

[0019] In one embodiment, the line dividing rod shaft and the line dividing plate are detachably connected.

[0020] In one embodiment, the line dividing rod shaft is provided with a limiting groove, and the boss of the line dividing piece is fixedly connected to the limiting groove by an adjusting screw.

[0021] In one embodiment, the boss is provided with an adjustment slot, and the position of the wire splitter can be moved left and right through the adjustment slot.

[0022] In one embodiment, the end portion of the line dividing piece for contacting the bobbin case is a pointed structure.

[0023] A rotary hook assembly comprises the rotary hook line dividing mechanism described in any one of the above items.

[0024] When using the rotary hook line dividing mechanism provided by the present invention, since the line dividing rod shaft and the rotary hook shaft are arranged in parallel, and one end of the rotating crank is mounted on the line dividing rod shaft, and the other end of the rotating crank is provided with a roller, the roller and the cam mounted on the rotary hook shaft are arranged in parallel, the outer peripheral surface of the cam fits the roller, and the two roll together, that is, the contact between the cam and the roller is line contact, to ensure the level of force transmission and the direction of force is not tilted, thereby extending the life of the parts. Moreover, the line dividing plate is arranged in parallel with the shuttle housing, so that the contact between the line dividing plate and the shuttle housing is line contact or surface contact, to ensure the level of force transmission and the direction of force is not tilted, which can also extend the life of the parts. That is, when the force is uniform, the life and wear of the parts are naturally effectively guaranteed. At the same time, the parts contact each other in line contact or surface contact. Compared with the original swing point contact or swing line contact, the base area is effectively increased, and the noise is effectively controlled and reduced, so that the line dividing plate of the present device is stable and reliable in force, and there will be no problem of serious wear of the parts.

[0025] At the same time, when the rotary hook shaft rotates, the cam can rotate synchronously with the rotary hook shaft. During the rotation of the cam, the protruding part of the cam can periodically push the roller of the rotating crank, so that the rotating crank rotates periodically. The rotating crank can drive the dividing rod shaft to rotate periodically, and the dividing rod shaft can drive the dividing piece to rotate, and finally the dividing piece periodically pushes the shuttle case of the rotary hook to periodically adjust the gap between the dividing piece and the shuttle case to achieve the effect of dividing the line.

[0026] In summary, the rotary hook line splitting mechanism provided by the utility model can ensure that the structure of the line splitting mechanism is stable and reliable, compact and easy to assemble under high-frequency line splitting conditions, and the line splitting mechanism generates low noise and low degree of parts wear.

[0027] In addition, the utility model also provides a rotary hook assembly including the above-mentioned rotary hook line dividing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of a wire splitting mechanism in the prior art that uses a cam drive and a connecting rod for swinging;

[0030] Figure 2 This is an exploded view of the hook line-dividing mechanism provided by the utility model;

[0031] Figure 3It is a structural diagram of the wire splitting rod shaft, rotating crank and wire splitting piece;

[0032] Figure 4 It is a structural diagram of the rotary hook line dividing mechanism;

[0033] Figure 5 This is a structural diagram of the hook line dividing mechanism from another perspective.

[0034] Reference numerals:

[0035] 01-Cam; 02-Swing lever;

[0036] 1-needle plate; 2-rotating hook; 3-line dividing rod shaft; 31-limiting groove; 4-hook frame; 5-cam; 6-torsion spring; 7-rotating crank; 71-connecting rod; 72-roller; 73-connecting part; 8-line dividing plate; 81-boss; 82-tip structure. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] The core of this utility model is to provide a rotary hook thread-splitting mechanism that can ensure a stable and reliable structure, compactness, and ease of assembly under high-frequency thread-splitting conditions, while also generating low noise and minimizing component wear. Another core of this utility model is to provide a rotary hook assembly including the rotary hook thread-splitting mechanism.

[0039] Please refer to Figures 2 to 5 .

[0040] This specific embodiment provides a rotary hook thread dividing mechanism, comprising:

[0041] Shuttle rack 4;

[0042] Hook shaft;

[0043] The rotary hook 2 includes a bobbin case and a bobbin core disposed in the bobbin case, and the rotary hook 2 is connected to the rotary hook shaft;

[0044] The line dividing rod shaft 3 passes through the shuttle frame 4 and is arranged parallel to the rotary hook shaft;

[0045] A crank 7 is rotated, one end of which is sleeved on the branch rod shaft 3, and a roller 72 is provided on the other end of the crank 7;

[0046] The cam 5 is sleeved on the hook shaft, and the outer peripheral surface of the cam 5 is in contact with the roller 72, and the two are in rolling cooperation;

[0047] The line dividing piece 8 is connected to the line dividing rod shaft 3. The line dividing piece 8 is used to rotate along with the line dividing rod shaft 3 to adjust the gap between the line dividing piece 8 and the bobbin case.

[0048] It should be noted that the wire splitter shaft 3 passes through the shuttle frame 4 and is arranged parallel to the rotary hook axis. The rotating crank 7 is fixed to the wire splitter shaft 3. This arrangement not only prevents the wire splitter shaft 3 from moving up and down, but also allows the wire splitter shaft 3 to rotate, thereby driving the wire splitter plate 8 to rotate and split the wire. This arrangement ensures stable and reliable force on the device and avoids severe wear of parts. The device also has a compact structure design, suitable for column-type integrated feeding machines with limited space, and is easy to assemble.

[0049] The sewing machine's rotary hook 2 and thread separator 8 are key components of the hook system, primarily used to interweave the upper and lower threads during sewing. The basic operation of the rotary hook 2 is identical to that commonly found in the sewing industry. Specifically, the rotary hook 2 is a mechanical device that interweaves the upper (upper) thread with the lower (lower) thread during sewing. It is typically located at the bottom of the sewing machine and operates synchronously with the needle.

[0050] During actual use, the shape, structure, size, material, position, etc. of the shuttle frame 4, rotating crank 7, dividing rod shaft 3, rotary hook 2, cam 5, dividing plate 8 and needle plate 1 can be determined according to actual conditions and actual needs.

[0051] When using the rotary hook line dividing mechanism provided by the present invention, since the line dividing rod shaft 3 and the rotary hook shaft are arranged in parallel, and one end of the rotating crank 7 is sleeved on the line dividing rod shaft 3, the other end of the rotating crank 7 is provided with a roller 72, and the roller 72 and the cam 5 sleeved on the rotary hook shaft are arranged in parallel, the outer peripheral surface of the cam 5 fits with the roller 72, and the two roll together, that is, the contact between the cam 5 and the roller 72 is a line contact, so as to ensure the level of force transmission, the force direction is not tilted, effectively reduce noise, and extend the life of parts. Moreover, the line dividing plate 8 is arranged in parallel with the shuttle housing, so that the contact between the line dividing plate 8 and the shuttle housing is a line or surface contact, so as to ensure the level of force transmission, the force direction is not tilted, effectively reduce noise, and extend the life of parts. In addition, the structure of the device is simple, the assembly operation is simple and fast, and the mechanism is stable and reliable.

[0052] In summary, the rotary hook line splitting mechanism provided by the utility model can ensure that the structure of the line splitting mechanism is stable and reliable, compact and easy to assemble under high-frequency line splitting conditions, and the line splitting mechanism generates low noise and low degree of parts wear.

[0053] In one embodiment, Figure 3As shown, the rotating crank 7 comprises a connecting rod 71, a connecting portion 73 that fits over the wire-dividing rod shaft 3, and a roller 72 located at one end of the connecting rod 71. The connecting portion 73 is located at the other end of the connecting rod 71. In other words, the wire-dividing rod shaft 3 can be inserted through the shuttle frame 4 into the connecting portion 73 and locked into place as a single piece. The connecting rod 71 of the rotating crank 7 is positioned perpendicular to the wire-dividing rod shaft 3, and the connecting portion 73 abuts the bottom of the shuttle frame 4. Simultaneously, the top of the wire-dividing rod shaft 3 abuts the top of the shuttle frame 4, effectively preventing the wire-dividing rod shaft 3 from moving up and down while allowing the wire-dividing rod shaft 3 to rotate.

[0054] In one embodiment, the connecting rod 71 and the roller 72 are riveted together. The roller 72 on the crank 7 is fixed to the connecting rod 71 by a movable riveting method, so that the roller 72 can rotate relative to the connecting rod 71 to prevent the roller 72 and the cam 5 from being in unilateral contact and causing local wear of the parts.

[0055] It should be noted that the cam 5 has a certain trajectory eccentricity to push the roller 72 of the rotating crank 7 to rotate, and the outer peripheral surface of the cam 5 fits with the roller 72, and the two roll together, that is, the contact between the cam 5 and the roller 72 is a rolling line contact, rather than a unilateral contact or point contact. There is no need to process the outer surface of the cam 5 into a curved surface that fits with the roller 72 to reduce wear, so this device can effectively reduce the processing difficulty of the cam 5.

[0056] In one embodiment, Figure 2 As shown, the shuttle frame 4 is provided with a torsion spring hole, and the rotating crank 7 is provided with a torsion spring 6. The other elastic end of the torsion spring 6 is fixed in the torsion spring hole. In this way, the torsion spring 6 will continuously exert pressure on the rotating crank 7, so that the roller 72 on the rotating crank 7 is always in contact with the cam 5, and the dividing plate 8 is fixed on the dividing rod shaft 3.

[0057] In one embodiment, the dividing rod shaft 3 and the dividing plate 8 are detachably connected. Therefore, when one of the dividing rod shaft 3 or the dividing plate 8 is damaged, the damaged component can be replaced by disassembly, and the new component can continue to be used in conjunction with other undamaged components to increase the service life of the device and reduce the maintenance cost of the device.

[0058] In one embodiment, Figure 3 As shown, the line dividing rod shaft 3 is provided with a limiting groove 31, and the boss 81 of the line dividing piece 8 is fixedly connected to the limiting groove 31 by an adjusting screw.

[0059] Therefore, the bottom boss 81 of the wire splitter 8 can be placed into the limiting groove 31 of the wire splitter shaft 3. The sizes of the boss 81 and the limiting groove 31 are matched so that the limiting groove 31 can initially clamp the boss 81. Then, the operator can pass the adjusting screw through the boss 81 and the limiting groove 31 to lock the wire splitter shaft 3 and the wire splitter 8, so that the wire splitter 8 rotates synchronously with the wire splitter shaft 3. Moreover, by connecting the wire splitter 8 and the wire splitter shaft 3 in this way, it is possible to avoid too many parts that need to be adjusted when adjusting the height of the wire splitter 8. That is, the wire splitter shaft 3 and the wire splitter 8 are groove-matched, which can avoid the cumbersome operation caused by adjusting the height of the wire splitter 8 up and down.

[0060] In one embodiment, the boss 81 is provided with an adjustment slot, and the position of the dividing piece 8 can be moved left and right through the adjustment slot to facilitate adjustment of the gap between the dividing piece 8 and the bobbin case. Moreover, the dividing piece 8 and the dividing rod shaft 3 are connected in a groove fit, and there is no need to adjust the height of the dividing piece 8 up and down, avoiding the trouble caused by the up and down adjustment, making the gap adjustment between the dividing piece 8 and the bobbin case simple.

[0061] In one embodiment, Figure 3 As shown, the end of the thread dividing piece 8 that contacts the bobbin case is a pointed structure 82. The pointed structure 82 can more accurately and forcefully move the bobbin case to adjust the gap between the thread dividing piece 8 and the bobbin case, allowing the upper thread to pass smoothly through the gap. The thread dividing piece 8 works in conjunction with the rotary hook 2. When the needle brings the upper thread into the area of ​​the rotary hook 2, the pointed structure 82 will move the bobbin case, separating the positioning hook of the rotary hook 2 from the needle plate 1. When the positioning hook of the rotary hook 2 separates from the needle plate 1, the pointed structure 82 of the thread dividing piece 8 guides the upper thread to the top of the bobbin case, causing it to pass around the bobbin case. At this time, the upper thread can be smoothly pulled through the bobbin case and entangled with the bottom thread to form a suture thread.

[0062] In addition to the above-mentioned rotary hook line dividing mechanism, the present invention also provides a rotary hook assembly including the rotary hook line dividing mechanism disclosed in the above-mentioned embodiment. For the structures of other parts of the rotary hook assembly, please refer to the prior art and will not be described in detail herein.

[0063] In addition, it should be noted that the orientation or position relationship indicated by "upper" and "lower" in the present invention is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of simplifying the description and facilitating understanding, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. Any combination of all the embodiments provided by this utility model is within the scope of protection of this utility model and will not be described in detail here.

[0065] The above describes in detail the rotary hook assembly and its rotary hook thread-dividing mechanism provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the claims of the present invention.

Claims

1. A hook line dividing mechanism, characterized in that: include: Shuttle rack (4); Hook shaft; A rotary hook (2), comprising a bobbin case and a bobbin core arranged in the bobbin case, wherein the rotary hook (2) is connected to the rotary hook shaft; A line dividing rod shaft (3), which passes through the shuttle frame (4) and is arranged parallel to the rotary shuttle shaft; A rotating crank (7), one end of which is sleeved on the line dividing rod shaft (3), and the other end of the rotating crank (7) is provided with a roller (72); A cam (5) is sleeved on the rotary hook shaft, and the outer peripheral surface of the cam (5) is in contact with the roller (72), and the two are in rolling cooperation; A line dividing plate (8) is connected to the line dividing rod shaft (3), and the line dividing plate (8) is used to rotate along with the line dividing rod shaft (3) to adjust the gap between the line dividing plate (8) and the bobbin case.

2. The hook thread dividing mechanism according to claim 1, characterized in that: The rotating crank (7) comprises a connecting rod (71), a connecting portion (73) sleeved on the line dividing rod shaft (3), and the roller (72) provided at one end of the connecting rod (71); the connecting portion (73) is provided at the other end of the connecting rod (71).

3. The hook thread dividing mechanism according to claim 2, characterized in that: The connecting rod (71) and the roller (72) are riveted together.

4. The hook thread dividing mechanism according to claim 1, characterized in that: The shuttle frame (4) is provided with a torsion spring hole, the rotating crank (7) is sleeved with a torsion spring (6), and the other elastic end of the torsion spring (6) is fixed in the torsion spring hole.

5. The hook thread dividing mechanism according to any one of claims 1 to 4, characterized in that: The line dividing rod shaft (3) and the line dividing plate (8) are detachably connected.

6. The hook thread dividing mechanism according to claim 5, characterized in that: The line dividing rod shaft (3) is provided with a limiting groove (31), and the boss (81) of the line dividing piece (8) is fixedly connected to the limiting groove (31) via an adjusting screw.

7. The hook thread dividing mechanism according to claim 6, characterized in that: The boss (81) is provided with an adjustment slot, and the position of the line splitter (8) can be moved left and right through the adjustment slot.

8. The hook thread dividing mechanism according to claim 5, characterized in that: The end portion of the line dividing piece (8) used for contacting the bobbin case is a pointed structure (82).

9. A rotary hook assembly, characterized in that: The invention comprises the rotary hook thread dividing mechanism according to any one of claims 1 to 7.

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