A thread-hooking suspended rotary shuttle

Abstract

The present application provides a thread-hooking floating rotating shuttle, specifically relating to the technical field of sewing machine manufacturing. It includes a rotating shuttle fixed seat and a floating bobbin. There is a positioning arrangement between the floating bobbin and the rotating shuttle fixed seat. Preferably, the positioning convex block of the floating bobbin is arranged on the side close to the rotating shuttle fixed seat. The rotating shuttle fixed seat also has a positioning groove, and the positioning convex block of the floating bobbin is positioned in the positioning groove of the rotating shuttle fixed seat. The thread-hooking floating rotating shuttle of the present application has the advantages of no need for lubricating oil, non-contact, non-wearing, and high service life. It does not require matching complex variable-speed gear sets, improves the overall performance of the sewing machine, reduces the cost of the sewing machine, and subverts the traditional design and manufacturing thinking of sewing machines, having high promotion value.

Description

Technical Field

[0001] The present application provides a thread-hooking floating rotating shuttle. The thread-hooking floating rotating shuttle of this solution is applied to various sewing equipment using rotating shuttles, such as household sewing machines, industrial flat-sewing machines, thick-material machines, embroidery machines, and roller sewing machines, and specifically relates to the technical field of sewing machine manufacturing. Background Art

[0002] As a sewing machine for fabrics, it has a development history of more than two hundred years, making significant contributions to the development of the clothing industry in human society and promoting the development of human social civilization. Looking at the development history of sewing machine technology, its rotating shuttle still follows the original solution, and the implemented technical principle remains the same. As a key component of sewing equipment, the rotating shuttle has high requirements in production and manufacturing, and the production cost is also high. In addition, the rotating shuttle is extremely easy to be damaged in the use process, and the failure rate is also high, resulting in a relatively short service life. During sewing, when the rotating shuttle operates at high speed, it is necessary to add grease to the rotating shuttle body and the high-speed rotating parts of the rotating shaft. In addition, the high-speed rotating rotating shuttle requires the mechanical transmission system of the sewing machine to support, and a complex speed-changing gear set needs to be matched, which increases the cost of the sewing machine. The lubrication required for the rotating shuttle and its rotating shaft causes pollution to the sewing thread and fabric, reducing the sewing quality; the high-speed operation of the rotating shuttle restricts the development of intelligent automation, oil-free, and lightweight of sewing equipment. Summary of the Invention

[0003] Aiming at the above technical deficiencies of the rotating shuttle of existing sewing equipment, the present application breaks the conventional sewing machine design concept and launches and produces a thread-hooking floating rotating shuttle with no contact, no friction, and no need for oil lubrication, which is convenient to use and has a long service life. It is characterized in that it includes a rotating shuttle fixed seat and a floating bobbin, and there is a positioning arrangement between the floating bobbin and the rotating shuttle fixed seat.

[0004] Preferably, the positioning convex block of the floating bobbin is arranged on the side close to the rotating shuttle fixed seat, and the rotating shuttle fixed seat also has a positioning groove, and the positioning convex block of the floating bobbin is positioned in the positioning groove of the rotating shuttle fixed seat.

[0005] Preferably, it further includes an anti-slip-out baffle. The floating bobbin has a thread-sliding inclined surface and a thread-sliding flat surface. The inner arc surface of the rotating shuttle fixed seat has a thread-sliding gap relative to the thread-sliding inclined surface, and the thread-sliding flat surface has a thread-sliding gap relative to the anti-slip-out baffle.

[0006] Preferably, the front convex block of the floating bobbin is arranged at the front end of the thread-dividing convex platform, and the front convex block is provided with a lower-thread leading-out groove.

[0007] Preferably, the thread-sliding inclined surface and the thread-sliding flat surface are located on both sides of the thread-dividing convex platform.

[0008] Preferably, the wire-sliding inclined plane of the floating bobbin faces the inner arc surface of the rotary hook fixing base.

[0009] Preferably, a wire pressing plate is fixed on the wire-sliding plane, and the wire pressing plate is fixed on the wire-sliding plane with screws.

[0010] Compared with the prior art, the beneficial effects of the present application are as follows: The floating bobbin and its wire frame of the present application are configured in the inner cavity of the fixed rotary hook fixing base. The motor drives the hook needle to hook the upper thread of the sewing needle, and drives the wire frame to feed the thread. This process is contactless and frictionless, so that the wire-hooking floating rotary hook of the present application does not need to rotate at a high speed like the prior art to achieve sewing work, realizing the static operation of the wire-hooking floating rotary hook of the present application, and also making the sewing equipment applying the wire-hooking floating rotary hook of the present application have better mechanical transmission efficiency. A wire-hooking floating rotary hook of the present application has the advantages of no need for lubricating oil, contactless, non-wearing and long service life, does not need to match a complex speed-changing gear set, improves the overall performance of the sewing machine, reduces the cost of the sewing machine, and a wire-hooking floating rotary hook of the present application subverts the traditional design and manufacturing concept of sewing machines and has high popularization value. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of a wire-hooking floating rotary hook of the present application;

[0012] Figure 2 is a side view of a wire-hooking floating rotary hook of the present application;

[0013] Figure 3 is an exploded view of the rotary hook fixing base, floating bobbin and wire frame of a wire-hooking floating rotary hook of the present application;

[0014] Figure 4 is a wire-hooking floating rotary hook of the present application Figure 2 magnified view;

[0015] Figure 5 is a schematic diagram of the initial wire-hooking state of a wire-hooking floating rotary hook of the present application;

[0016] Figure 6 is a schematic diagram of the thread-off state of a wire-hooking floating rotary hook of the present application;

[0017] Figure 7 is a schematic diagram of the first sewing point of a wire-hooking floating rotary hook of the present application;

[0018] Figure 8 is a schematic diagram of the rotary hook fixing base vertically arranged of a wire-hooking floating rotary hook of the present application;

[0019] Figure 9 is a wire-hooking floating rotary hook of the present application Figure 8 partial enlarged view;

[0020] Figure 10 It is a structural diagram of a shuttle fixing base and a floating bobbin core of a thread-hooking floating shuttle in this application;

[0021] Figure 11 It is a structural diagram of a floating bobbin core of a thread-hooking floating shuttle in this application.

[0022] Reference numerals: sewing machine head 1, sewing needle 2, thread-hooking position 21, shuttle fixing base 3, anti-slip baffle 31, positioning groove 32, inner arc surface 33, thread-hooking needle 5, thread holder 6, floating bobbin core 7, positioning convex block 71, sewing needle positioning hole groove 711, thread-dividing convex platform 72, thread-sliding inclined surface 73, thread-sliding flat surface 74, front convex block 75, lower thread leading-out groove 76, needle plate 8, needle plate hole 81, motor 91, hollow main shaft 911, positioning connecting rod 92, bearing 93, upper thread 1a, lower thread 1d, thread-off position 1c, presser plate 90. Specific embodiments

[0023] The preferred embodiments of this application are elaborated in detail below with reference to the accompanying drawings, so that the advantages and features of this application can be more easily understood by those skilled in the art, thereby making the protection scope of this application more clearly defined. These embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Embodiment 1

[0024] Combining Figure 1 Figure 2 Figure 3 、 Figure 4 and Figure 10 and Figure 11 A thread-hooking floating shuttle of this application has a motor 91, a shuttle fixing base 3, a floating bobbin core 7, a sewing needle 2, a positioning connecting rod 92, a thread holder 6 and a thread-hooking needle 5. The shuttle fixing base 3 of this application is fixed, that is, the shuttle fixing base 3 is connected to the positioning connecting rod 92, and the shuttle fixing base 3 and its positioning connecting rod 92 are stationary during sewing. The positioning connecting rod 92 is indirectly or directly fixed on the substrate (or base) of the sewing machine head 1. The sewing needle 2 has a thread-hooking position 21 for the thread-hooking needle 5 to hook the thread.

[0025] The above-mentioned motor 91 has a hollow main shaft 911. The hollow main shaft 911 is the output shaft of the motor. The positioning connecting rod 92 passes through the hollow main shaft 911, and a bearing 93 is arranged between the hollow main shaft 911 and the positioning connecting rod 92. The motor 91 and the positioning connecting rod 92 are movably connected. The motor 91 is fixed on the sewing machine head 1, and the hollow main shaft 911 of the motor 91 drives the thread-hooking needle 5 to operate. The above-mentioned positioning connecting rod 92 and the thread holder 6 are coaxially arranged.

[0026] The above-mentioned thread-hooking needle 5 is directly connected to the motor 91, or, as another embodiment, a connecting body is arranged between the thread-hooking needle 5 and the motor 91, so that the motor 91 drives the thread-hooking needle 5 to operate.

[0027] The motor 91 arranged in the bottom direction of the rotating hook fixed seat 3 drives the hook needle 5 to perform circular motion with the positioning connecting rod 92 as the central axis, and the installation position and angle of the rotating hook fixed seat 3 can be adjusted according to the requirements of different sewing equipment.

[0028] The above-mentioned rotating hook fixed seat 3 is provided with an anti-slip-out baffle 31. The above-mentioned rotating hook fixed seat 3 is provided with an anti-slip-out front baffle 31. When the anti-slip-out front baffle 31 is installed on the rotating hook fixed seat 3, it may or may not be provided according to the use situation of the wire holder 6. In this embodiment, the case where the anti-slip-out front baffle 31 is provided is taken as an example for illustration. Specifically: The anti-slip-out baffle 31 is installed on the side or end of the rotating hook fixed seat 3. The above-mentioned anti-slip-out baffle 31 is provided and fixed on the rotating hook fixed seat 3 in the form of a cover plate. The anti-slip-out baffle 31 abuts against the floating bobbin 7 and / or the wire holder 6 during the sewing process, playing a role in laterally positioning the above-mentioned floating bobbin 7 and the wire holder 6. Here, the connection method between the rotating hook fixed seat 3 and the anti-slip-out baffle 31 of the present application is a spring hinge type, and it can also be set as a positioning connection. Pushing the anti-slip-out baffle 31 to the side by hand can achieve the opening or closing of the anti-slip-out baffle 31. In addition, the above-mentioned anti-slip-out baffle 31 is arranged outside the range where the motor 91 drives the hook needle 5 to operate.

[0029] The above-mentioned rotating hook fixed seat 3 has an inner cavity that can accommodate the floating bobbin 7. The floating bobbin 7 has an inner cavity that can accommodate the wire holder 6. Specifically, the above-mentioned wire holder 6 is placed in the inner cavity of the floating bobbin 7, and the floating bobbin 7 and the wire holder 6 are placed in the inner cavity of the rotating hook fixed seat 3. Actually, the floating bobbin 7 together with the wire holder 6 is placed in it. When taking out, the floating bobbin 7 and the wire holder 6 are taken out from the inner cavity of the rotating hook fixed seat 3. There is a positioning setting and a wire-sliding gap between the floating bobbin 7 and the rotating hook fixed seat 3. The rotating hook fixed seat 3 also has a lower wire outlet hole.

[0030] The above-mentioned positioning setting is specifically: The above-mentioned floating bobbin 7 also has a positioning convex block 71 ( Figure 3 in), the positioning convex block 71 is arranged on the side close to the rotating hook fixed seat 3; the rotating hook fixed seat 3 also has a positioning groove 32, and the positioning groove 32 is arranged to match the positioning convex block 71. When the floating bobbin 7 is placed in the inner cavity of the rotating hook fixed seat 3, the positioning convex block 71 of the floating bobbin 7 is positioned in the positioning groove 32 of the rotating hook fixed seat 3. The positioning convex block 71 plays a role in positioning the floating bobbin 7 on the rotating hook fixed seat 3, ensuring the placement position of the floating bobbin 7 and also ensuring the free wire-sliding gap between the floating bobbin 7 and the rotating hook fixed seat 3.

[0031] The above-mentioned wire-sliding gap means: The floating bobbin 7 has a wire-dividing convex platform 72, a front convex block 75, a wire-sliding inclined surface 73 and a wire-sliding flat surface 74 ( Figure 2 Figure 3 and Figure 10 Figure 11In the middle), the sliding wire inclined plane 73 and the sliding wire flat plane 74 are located on both sides of the wire dividing boss 72. The sliding wire inclined plane 73 of the above-mentioned floating bobbin 7 faces the inner arc surface 33 of the rotary hook fixing base 3. There is a sliding wire gap between the inner arc surface 33 and the sliding wire inclined plane 73. There is a sliding wire gap between the sliding wire flat plane 74 and the anti-slip-out baffle 31. The function of the wire dividing boss 72 is to divide the wire for sliding. The sewing thread slides over the sliding wire inclined plane 73 first and then over the sliding wire flat plane 74 under the drive of the latch needle 5. The latch needle 5 rotates with the operation of the motor 91 on the outer circumference of the wire dividing boss 72 of the floating bobbin 7. A front convex block 75 is provided at the front end of the wire dividing boss 72. The latch needle positioning hole groove 711 is provided on the front convex block 75, and a lower thread lead-out groove 76 is provided on the front convex block 75. Since there is a sliding wire gap between the above-mentioned floating bobbin 7 and the rotary hook fixing base 3, it is beneficial for the sewing thread to bypass the wire dividing boss 72 for sliding.

[0032] The above-mentioned latch needle 5 rotates with the operation of the motor 91 on the outer circumference of the wire dividing boss 72 of the floating bobbin 7 and is on the tangential plane at the thread hooking position 21. The sewing needle 2 is parallel to the thread stand 6. The latch needle 5 is on the tangential plane at the thread hooking position 21. In this embodiment, the sewing needle 2 is parallel to the thread stand 6 (parallel to the side of the thread stand 6) for illustration.

[0033] The above-mentioned latch needle 5 and the floating bobbin 7 and between the floating bobbins 7 are in a non-contact thread hooking and wire dividing cooperation for work. First, place the thread stand 6 into the inner cavity of the floating bobbin 7, then put the floating bobbin 7 together with the thread stand 6 into the rotary hook fixing base 3. The positioning convex block 71 should be pressed on the positioning groove 32, and cover the anti-slip-out baffle 31. The anti-slip-out baffle 31 abuts against the front part of the floating bobbin 7 and / or the thread stand 6, and at the same time makes the anti-slip-out baffle 31 abut against the sliding wire flat plane 74 of the floating bobbin 7; the sliding wire inclined plane 73 on the wire dividing boss 72 faces the rotary hook fixing base 3, so that the sewing thread slides over the sliding wire flat plane 74 and the sliding wire inclined plane 73 on both sides of the wire dividing boss 72, forming a free sliding wire gap, achieving the technical effect of non-contact thread hooking and wire dividing of the sewing thread on a thread hooking floating rotary hook of the present application. The rotary hook fixing base 3 of the present application is different from the rotary hook of the prior art in the operation mode. The rotary hook fixing base 3 of the present application is static during sewing and performs sewing thread hooking without contact and wear.

[0034] At the end of sewing, the anti-slip-out baffle 31 is still in the closed state, that is, the anti-slip-out baffle 31 still faces the sliding wire flat plane 74 of the floating bobbin 7. When taking out the thread stand 6 with the used sewing thread, push open the anti-slip-out baffle 31, and the thread stand 6 can be taken out from the floating bobbin 7; when loading the thread stand 6, place the thread stand 6 in the inner cavity of the floating bobbin 7 and lead out the lower thread, and then cover the anti-slip-out baffle 31 to start sewing work; to take out the floating bobbin 7, push open the anti-slip-out baffle 31, and take out the floating bobbin 7 together with the thread stand 6 from the inner cavity of the rotary hook fixing base 3.

[0035] Combined with the attached drawings, the crochet hook 5 of the present application is arranged outside the rotary hook fixed seat 3. The needle positioning hole groove 711 of the front lug 75 allows the front end of the sewing needle 2 to operate. The crochet hook 5 hooks the upper thread on the thread hooking point 21 of the outer sewing needle 2 under the drive of the motor 91. The crochet hook 5 is connected to the motor 91, and the crochet hook 5 generates a corresponding thread hooking movement track under the drive of the motor 91, and coordinates with the sewing needle 2 to achieve the sewing purpose of hooking the thread. The upper thread 1a of the sewing needle 2 is used for sewing and hooking the thread, and the pulling force of the crochet hook 5 on the upper thread 1a drives the wire frame 6 of the floating bobbin 7 to output the wire source. Under the operation of the motor 91, the crochet hook 5 and the sewing needle 2 coordinate with each other, so that a relatively low rotational speed of the wire frame 6 can achieve sewing thread output during the sewing process, while the rotary hook fixed seat 3 and the floating bobbin 7 are in a static state, overcoming the requirement for high-speed operation of the rotary hook in the existing sewing machine technology.

[0036] In Figure 5 Figure 6 and Figure 7 of the present application, a thread-hooking floating rotary hook first guides the lower thread 1d to the lower thread outlet groove 76. When the sewing needle 2 brings the upper thread 1a through the fabric and reaches the needle positioning hole groove 711 of the floating bobbin 7, the motor 91 drives the crochet hook 5 to hook the upper thread 1a at the thread hooking point 21. The hooked upper thread 1a is divided into a front thread and a rear thread by the thread dividing boss 72 of the floating bobbin 7. The crochet hook 5 continues to rotate to more than 180 degrees to reach the thread-off position 1c and starts to release the thread. At the same time, the sewing needle 2 pulls the upper thread 1a to continue taking up the thread, tightens the upper thread 1a wound around the floating bobbin 7 and sleights the lower thread 1d to complete sewing. Embodiment 2

[0037] In Figure 8 and Figure 9 of this embodiment, Embodiment 2 is basically the same as Embodiment 1 above. The difference is that the sewing needle 2 of Embodiment 1 is perpendicular to the wire frame 6 and also has a needle plate 8. The front end of the sewing needle 2 mentioned above operates in the needle plate hole 81 on the needle plate 8. The sewing needle 2 is perpendicular to the needle plate 8, and the needle plate 8 is above the crochet hook 5 and the floating bobbin 7. The crochet hook 5 is on the tangent plane at the thread hooking point 21. The sewing needle 2 brings the upper thread 1a through the needle plate 8 into the initial thread hooking state. The tip part of the sewing needle 2 mentioned above runs in the needle plate 8. The sewing needle 2 works under the needle plate 8 outside the floating bobbin 7. The crochet hook 5 and the floating bobbin 7 and between the floating bobbins 7 work with non-contact thread hooking and thread dividing. The crochet hook 5 rotates with the motor 91 on the outer circumference of the thread dividing boss 72 of the floating bobbin 7. The direction of the crochet hook 5 is different from that of Embodiment 1, but the achieved thread hooking process is the same. The above solution has the same technical effect as Embodiment 1 and should also be within the protection scope of the present application.

[0038] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A thread-hooking floating rotary shuttle, characterized in that, it includes a motor (91), a positioning connecting rod (92), an anti-slip-out baffle (31), a rotary shuttle fixing seat (3) and a floating bobbin (7). There is a positioning arrangement between the floating bobbin (7) and the rotary shuttle fixing seat (3). The rotary shuttle fixing seat (3) is stationary. The rotary shuttle fixing seat (3) is connected to the positioning connecting rod (92). The output shaft of the motor (91) is a hollow main shaft (911). The positioning connecting rod (92) passes through the hollow main shaft (911). There is a movable connection between the motor (91) and the positioning connecting rod (92). The hollow main shaft (911) is connected to and drives the thread-hooking needle (5) to operate. The motor (91) arranged in the bottom direction of the rotary shuttle fixing seat (3) takes the positioning connecting rod (92) as the central axis and drives the thread-hooking needle (5) to make a circular motion. There is a thread-sliding gap between the floating bobbin (7) and the rotary shuttle fixing seat (3). The positioning arrangement is: the floating bobbin (7) has a positioning convex block (71). The floating bobbin (7) also has a front convex block (75) and a thread-sliding plane (74). The positioning convex block (71) is arranged on the side close to the rotary shuttle fixing seat (3). The rotary shuttle fixing seat (3) has a positioning groove (32). The positioning convex block (71) is positioned in the positioning groove (32). There is a thread-sliding gap between the thread-sliding plane (74) and the anti-slip-out baffle (31). The front convex block (75) is provided with a lower-thread leading-out groove (76).

2. A thread-hooking floating rotary shuttle according to claim 1, characterized in that, the floating bobbin (7) also has a thread-sliding inclined plane (73). The rotary shuttle fixing seat (3) also has an inner arc surface (33). There is a thread-sliding gap between the inner arc surface (33) and the thread-sliding inclined plane (73).

3. A thread-hooking floating rotary shuttle according to claim 2, characterized in that , the thread-sliding inclined plane (73) and the thread-sliding plane (74) are located on both sides of the thread-splitting boss (72).

4. A thread-hooking floating rotary shuttle according to claim 2, characterized in that, the thread-sliding inclined plane (73) faces the inner arc surface (33).

5. A thread-hooking floating rotary shuttle according to claim 1, characterized in that, the front convex block (75) is arranged at the front end of the thread-splitting boss (72).

6. A thread-hooking floating rotary shuttle according to claim 1, characterized in that, a wire pressing plate (90) is fixedly arranged on the thread-sliding plane (74). The wire pressing plate (90) is fixed on the thread-sliding plane (74) with screws.

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