A rotating shuttle mechanism and sewing device

Abstract

The utility model discloses a kind of rotary hook mechanism and sewing device, it is related to sewing equipment technical field, and it includes: fixed support;Motor;Motor is fixed in the first surface of fixed support, the motor rotating shaft of motor is rotatably installed in support through hole, and the end of motor rotating shaft extends to the second surface side of fixed support, and first pulley is set on end portion;Rotary hook;Rotary hook located in the second surface side includes: rotary hook shaft, second pulley, rotary hook main body and rotary hook shell;Rotary hook shaft's first end is fixedly connected with fixed support;The outer periphery of rotary hook shaft is set with second pulley, second pulley can relatively rotate around the axis of rotary hook shaft, to drive rotary hook shell around the axis of rotary hook main body;Synchronous belt;Synchronous belt is set on the outer periphery of first pulley and second pulley.This technical solution changes the traditional transmission mode, through synchronous belt transmission and rotary hook shaft fixedly, reduce noise, and simultaneously, synchronous belt is convenient for manufacturing and installation, reduce the manufacturing and assembly cost of this rotary hook mechanism.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment technology, and in particular to a rotary hook mechanism and a sewing device. Background Technology

[0002] The working principle of sewing devices (represented by sewing machines and embroidery machines) is based on the mechanical movement of needle and thread. Through the coordinated action of multiple mechanisms, the thread is interwoven or pierced into materials such as fabric to achieve sewing or embroidery. Among them, the rotary hook mechanism is indispensable in the operation of sewing devices.

[0003] Traditional rotary hook mechanisms require gear transmission between the drive shaft and the gear drive. Gear transmission is noisy, requires high precision in the machining of parts, and also requires skilled installers, thus significantly increasing the cost of the product. Utility Model Content

[0004] In view of this, the present invention provides a rotary shuttle mechanism that effectively reduces transmission noise by changing the traditional transmission method. At the same time, the assembly cost of the rotary shuttle mechanism is reduced because the synchronous belt is easy to manufacture and install.

[0005] This utility model also provides a sewing device including the above-mentioned rotary shuttle mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary hook mechanism, suitable for sewing devices, comprising:

[0008] Fixed bracket;

[0009] The motor is fixed to the first side of the fixed bracket, the fixed bracket has a through hole, the motor shaft of the motor is rotatably installed in the through hole, and the end of the motor shaft extends to one side of the second side of the fixed bracket, and a first pulley is sleeved on the end; wherein the first side and the second side are arranged opposite to each other.

[0010] A rotary shuttle; the rotary shuttle located on one side of the second face includes: a rotary shuttle shaft, a second pulley, a rotary shuttle body, and a rotary shuttle outer shell;

[0011] The first end of the shuttle shaft is fixedly connected to the fixed bracket, the bottom surface of the shuttle housing is rotatably connected to the second end of the shuttle shaft, the shuttle body is coaxially installed inside the shuttle housing, and the installation between the shuttle housing and the shuttle body is rotatable.

[0012] A second pulley is fitted on the outer circumferential surface of the shuttle shaft. The second pulley is partially connected to the shuttle housing. The second pulley is capable of rotating relative to the axis of the shuttle shaft to drive the shuttle housing to rotate around the axis of the shuttle body.

[0013] Synchronous belt; the synchronous belt is sleeved on the outer periphery of the first pulley and the second pulley.

[0014] Preferably, the outer peripheral surfaces of the first pulley and the second pulley are both provided with first transmission teeth, and the inner peripheral surface of the synchronous belt is provided with second transmission teeth that match the first transmission teeth.

[0015] Preferably, the bottom surface of the rotary hook housing has a sleeve portion, the inner circumferential surface of the sleeve portion is rotatably sleeved on the outer circumferential surface of the rotary hook shaft, and the second pulley is fixedly sleeved on the outer circumferential surface of the sleeve portion.

[0016] Preferably, the fit between the sleeve portion and the rotary shaft is a clearance fit.

[0017] Preferably, the rotary shaft has a storage space for placing a lubricant, and the peripheral wall of the rotary shaft has an opening communicating with the storage space, the opening facing the inner peripheral surface of the sleeve portion, so that the lubricant can overflow to achieve lubrication between the sleeve portion and the rotary shaft.

[0018] Preferably, the lubricant is an oil-soaked cotton.

[0019] Preferably, the second end of the shuttle shaft is provided with a first annular limiting protrusion, and the bottom surface of the shuttle shell is provided with a limiting groove that rotates relative to the first annular limiting protrusion.

[0020] Preferably, the outer circumferential surface of the shuttle body is provided with a second annular limiting protrusion, the inner circumferential surface of the shuttle shell is provided with a limiting part that cooperates with the second annular limiting protrusion, and the second annular limiting protrusion can rotate relative to the limiting part.

[0021] Preferably, the rotary shuttle body has a fixed shaft in the middle for fixing it.

[0022] A sewing device includes: the aforementioned rotary shuttle mechanism.

[0023] As can be seen from the above technical solution, the rotary shuttle mechanism provided by this utility model changes the traditional transmission method (the rotary shuttle shaft and the drive shaft need to be transmitted through gears, and the rotary shuttle shaft rotates) to transmit through a synchronous belt, and the rotary shuttle shaft is fixed. In this way, the noise is reduced (the noise caused by gear transmission is large). At the same time, since the synchronous belt 40 is easy to manufacture and install, the manufacturing and assembly cost of this rotary shuttle mechanism is reduced.

[0024] This utility model also provides a sewing device. Since the above-mentioned sewing device is used, it has corresponding beneficial effects, which can be referred to in the previous description and will not be repeated here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a first-view structural schematic diagram of the rotary hook mechanism;

[0027] Figure 2 This is a structural schematic diagram of the rotary hook mechanism from a second perspective;

[0028] Figure 3 This is a structural schematic diagram of the rotary hook mechanism from a third-person perspective;

[0029] Figure 4 for Figure 3 A sectional view along the AA cutting plane;

[0030] Figure 5 for Figure 4 A magnified view of a portion at point B;

[0031] Figure 6 This is a structural schematic diagram of the rotary hook mechanism from a fourth perspective;

[0032] Figure 7 This is a structural schematic diagram of the rotary hook mechanism from the fifth perspective.

[0033] The meanings of the various reference numerals in the figure are as follows:

[0034] 10 is a fixed bracket, 11 is the first surface, 12 is the second surface, and 13 is a through hole for the bracket;

[0035] 20 is the motor, 21 is the motor shaft, and 22 is the first pulley;

[0036] 30 is a rotary shuttle, 31 is a rotary shuttle shaft, 311 is a storage space, 312 is an opening, 313 is a first annular limiting protrusion, 32 is a second pulley, 33 is the rotary shuttle body, 331 is a second annular limiting protrusion, and 332 is a fixed shaft.

[0037] 34 is the outer shell of the rotary shuttle, 341 is the sleeve part, 342 is the limiting groove, and 343 is the limiting part;

[0038] 40 is the synchronous belt. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] This utility model provides a rotary hook mechanism suitable for sewing devices, such as... Figures 1-3 As shown, it includes:

[0041] Fixed bracket 10;

[0042] Motor 20; Motor 20 is fixed to the first surface 11 of fixed bracket 10. Fixed bracket 10 is provided with a bracket through hole 13. Motor shaft 21 of motor 20 is rotatably installed in the bracket through hole 13, and the end of motor shaft 21 extends to one side of the second surface 12 of fixed bracket 10, and a first pulley 22 is sleeved on the end; wherein, the first surface 11 and the second surface 12 are arranged opposite to each other;

[0043] The rotary shuttle 30, located on one side of the second face 12, includes: a rotary shuttle shaft 31, a second pulley 32, a rotary shuttle body 33, and a rotary shuttle outer shell 34.

[0044] The first end of the shuttle shaft 31 is fixedly connected to the fixed bracket 10, the bottom surface of the shuttle housing 34 is rotatably connected to the second end of the shuttle shaft 31, and the shuttle body 33 is coaxially installed inside the shuttle housing 34. The installation between the shuttle housing 34 and the shuttle body 33 is rotatable.

[0045] A second pulley 32 is fitted onto the outer circumference of the shuttle shaft 31. The second pulley 32 is partially connected to the shuttle housing 34. The second pulley 32 can rotate relative to the axis of the shuttle shaft 31, thereby driving the shuttle housing 34 to rotate around the axis of the shuttle body 33. Figure 4 and Figure 5 As shown;

[0046] Synchronous belt 40; Synchronous belt 40 is fitted around the outer periphery of the first pulley 22 and the second pulley 32.

[0047] In the above technical solution, during use, the motor 20 starts, and the motor shaft 21 drives the second pulley 32 to rotate via the synchronous belt 40. The second pulley 32 then drives the shuttle outer shell 34 to rotate. Since the installation between the shuttle outer shell 34 and the shuttle body 33 is rotatable, while the shuttle body 33 is fixed, the rotating shuttle outer shell 34 and the stationary shuttle body 33 work together to interweave the top and bottom threads, forming a smooth and dense lockstitch. This technical solution changes the traditional transmission method (which requires gear transmission between the shuttle shaft and the drive shaft, and the shuttle shaft rotates) to transmission via the synchronous belt 40, with the shuttle shaft 31 fixed. This reduces noise (gear transmission generates significant noise), and because the synchronous belt 40 is easy to manufacture and install, it reduces the manufacturing and assembly costs of this shuttle mechanism.

[0048] To optimize the above technical solution and prevent slippage during operation of the rotary shuttle mechanism, both the outer circumferential surfaces of the first pulley 22 and the second pulley 32 are provided with first transmission teeth, and the inner circumferential surface of the synchronous belt 40 is provided with second transmission teeth that match the first transmission teeth. This ensures smooth operation of the rotary shuttle mechanism. In another embodiment, both the outer circumferential surfaces of the first pulley 22 and the second pulley 32 are provided with first transmission teeth, while the inner circumferential surface of the synchronous belt 40 is not provided.

[0049] Further optimize the above technical solutions, such as Figure 5 As shown, the bottom surface of the shuttle housing 34 has a sleeve portion 341. The inner circumferential surface of the sleeve portion 341 is rotatably fitted onto the outer circumferential surface of the shuttle shaft 31, and the second pulley 32 is fixedly fitted onto the outer circumferential surface of the sleeve portion 341. In this technical solution, the motor shaft 21 drives the second pulley 32 to rotate via the synchronous belt 40, which in turn drives the shuttle housing 34 to rotate via the sleeve portion 341.

[0050] Further optimization of the above technical solution is achieved to improve lubrication and heat dissipation, and to reduce assembly steps. The fit between the sleeve portion 341 and the rotary hook shaft 31 is a clearance fit.

[0051] Further optimization of the above technical solutions, such as Figure 5 The rotary shuttle shaft 31 has a storage space 311 for holding lubricating components. An opening 312 communicating with the storage space 311 is located on the peripheral wall of the rotary shuttle shaft 31, facing the inner peripheral surface of the sleeve portion 341. Lubricating agents can overflow from the lubricating components, thus achieving lubrication between the sleeve portion 341 and the rotary shuttle shaft 31. During operation, the sleeve portion 341 rotates around the rotary shuttle shaft 31, and the overflowing lubricating agents provide lubrication, preventing wear and tear on both components and thus extending the service life of the rotary shuttle mechanism. Furthermore, lubrication also helps reduce noise.

[0052] To further optimize the above technical solution and reduce manufacturing costs, the lubricant is made of oil-soaked cotton.

[0053] In an optional technical solution, the second end of the shuttle shaft 31 is provided with a first annular limiting protrusion 313, and the bottom surface of the shuttle housing 34 is provided with a limiting groove 342 that rotatably engages with the first annular limiting protrusion 313. Specifically, the first annular limiting protrusion 313 is engaged in the limiting groove 342, and there is a gap between the two, so that the shuttle housing 34 can rotate relative to the shuttle shaft 31.

[0054] In one of the alternative technical solutions, such as Figure 4 and Figure 5 As shown, the outer circumferential surface of the shuttle body 33 is provided with a second annular limiting protrusion 331, and the inner circumferential surface of the shuttle shell 34 is provided with a limiting part 343 that cooperates with the second annular limiting protrusion 331, and the second annular limiting protrusion 331 can rotate relative to the limiting part 343. Specifically, the second annular limiting protrusion 331 is installed in the limiting part 343 to fix the shuttle body 33 and the shuttle shell 34, and the limiting part 343 is a limiting groove, in which the second annular limiting protrusion 331 is inserted, and there is a gap between the two, so that the shuttle shell 34 can rotate relative to the shuttle body 33.

[0055] In one alternative technical solution, the rotary hook body 33 has a fixing shaft 332 in the middle for fixing it. Specifically, during installation, the fixing shaft 332 and other components of the sewing device are fixedly installed so that the rotary hook body 33 does not rotate when the rotary hook housing 34 rotates, thereby achieving the interlacing of the top thread and the bottom thread.

[0056] In one of the alternative technical solutions, such as Figure 6 and Figure 7 As shown, this rotary hook mechanism integrates the fixed bracket 10, motor 20, rotary hook 30, and synchronous belt 40 into a single unit, resulting in a small transmission space, a compact structure, and high transmission efficiency, making it more flexible and reliable when applied to sewing devices. In another optional technical solution, the installation space for this rotary hook mechanism is only about 35 mm, significantly reducing the space required compared to traditional rotary hook mechanisms.

[0057] In one alternative technical solution, the fit between the sleeve portion 341 and the second pulley 32 is an interference fit.

[0058] This utility model also provides a sewing device, including: the rotary hook mechanism as described above. Since this solution uses the aforementioned rotary hook mechanism, it has corresponding beneficial effects, as detailed in the preceding description, which will not be repeated here.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary shuttle mechanism, suitable for sewing devices, characterized in that, include: Fixed bracket (10); Motor (20); The motor (20) is fixed to the first surface (11) of the fixed bracket (10), the fixed bracket (10) is provided with a bracket through hole (13) through it, the motor shaft (21) of the motor (20) is rotatably installed in the bracket through hole (13), and the end of the motor shaft (21) extends to one side of the second surface (12) of the fixed bracket (10), and a first pulley (22) is sleeved on the end; wherein, the first surface (11) and the second surface (12) are arranged opposite to each other; The rotary shuttle (30) located on one side of the second face (12) includes: a rotary shuttle shaft (31), a second pulley (32), a rotary shuttle body (33), and a rotary shuttle shell (34). The first end of the shuttle shaft (31) is fixedly connected to the fixed bracket (10), the bottom surface of the shuttle housing (34) is rotatably connected to the second end of the shuttle shaft (31), the shuttle body (33) is coaxially installed inside the shuttle housing (34), and the installation between the shuttle housing (34) and the shuttle body (33) is rotatable. The outer circumferential surface of the shuttle shaft (31) is fitted with a second pulley (32), which is partially connected to the shuttle housing (34). The second pulley (32) can rotate relative to the axis of the shuttle shaft (31) to drive the shuttle housing (34) to rotate around the axis of the shuttle body (33). Synchronous belt (40); the synchronous belt (40) is fitted around the outer periphery of the first pulley (22) and the second pulley (32).

2. The rotary shuttle mechanism according to claim 1, characterized in that, The outer circumferential surface of the first pulley (22) and the outer circumferential surface of the second pulley (32) are provided with first transmission teeth, and the inner circumferential surface of the synchronous belt (40) is provided with second transmission teeth that match the first transmission teeth.

3. The rotary shuttle mechanism according to claim 2, characterized in that, The bottom surface of the shuttle housing (34) is formed with a sleeve portion (341), the inner circumferential surface of the sleeve portion (341) is rotatably sleeved on the outer circumferential surface of the shuttle shaft (31), and the second pulley (32) is fixedly sleeved on the outer circumferential surface of the sleeve portion (341).

4. The rotary shuttle mechanism according to claim 3, characterized in that, The fit between the sleeve part (341) and the rotary shaft (31) is a clearance fit.

5. The rotary shuttle mechanism according to claim 4, characterized in that, The rotary shaft (31) is provided with a storage space (311) for placing a lubricant. The peripheral wall of the rotary shaft (31) is provided with an opening (312) communicating with the storage space (311). The opening (312) faces the inner peripheral surface of the sleeve (341). The lubricant can overflow to achieve lubrication between the sleeve (341) and the rotary shaft (31).

6. The rotary shuttle mechanism according to claim 5, characterized in that, The lubricant is oiled cotton.

7. The rotary shuttle mechanism according to claim 1, characterized in that, The second end of the shuttle shaft (31) is provided with a first annular limiting protrusion (313), and the bottom surface of the shuttle housing (34) is provided with a limiting groove (342) that rotates relative to the first annular limiting protrusion (313).

8. The rotary shuttle mechanism according to claim 1, characterized in that, The outer circumferential surface of the rotary shuttle body (33) is provided with a second annular limiting protrusion (331), and the inner circumferential surface of the rotary shuttle shell (34) is provided with a limiting part (343) that cooperates with the second annular limiting protrusion (331). The second annular limiting protrusion (331) can rotate relative to the limiting part (343).

9. The rotary shuttle mechanism according to claim 1, characterized in that, The rotary shuttle body (33) has a fixed shaft (332) in the middle for fixing it.

10. A sewing device, characterized in that, include: The rotary shuttle mechanism as described in any one of claims 1-9.

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