A thread-hooking suspended rotating shuttle

Abstract

The present application provides a thread-hooking floating rotary shuttle, which specifically relates to the technical field of sewing machine manufacturing. It includes a wire rack intelligently placed in the inner cavity of a floating bobbin case. The floating bobbin case and the wire rack are placed in the inner cavity of a rotary shuttle fixed seat. The rotary shuttle fixed seat is connected to a positioning connecting rod. An anti-slip-out baffle is arranged at the front part of the rotary shuttle fixed seat. A bearing is arranged between the hollow main shaft of the motor and the positioning connecting rod. The motor is connected to a hooking needle. The thread-hooking floating rotary shuttle of the present application has the advantages of no need for lubricating oil, no wear, high life, no need to match a complex speed-changing gear set, improves the overall performance of the sewing machine, and reduces the manufacturing cost of the sewing machine. The thread-hooking floating rotary shuttle of the present application subverts the traditional design and manufacturing thinking of sewing machines and has high popularization 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] The sewing machine, as a machine for sewing fabrics, 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 damage in the use process, and the failure rate is also high, resulting in a relatively short service life. During sewing, when the rotating shuttle runs at a 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 of 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 oil lubrication, which is convenient to apply and has a long service life. The thread-hooking floating rotating shuttle includes a thread holder and a thread-hooking needle, and is characterized in that it has a motor. The thread holder is placed in the inner cavity of the floating bobbin. The floating bobbin and the thread holder are placed in the inner cavity of the rotating shuttle fixing seat. The rotating shuttle fixing seat is connected to a positioning connecting rod. An anti-slip-out baffle is provided at the front of the rotating shuttle fixing seat. A movable connection is provided between the hollow main shaft of the motor and the positioning connecting rod. The hollow main shaft of the motor is connected to the thread-hooking needle. The anti-slip-out baffle is set outside the operation range of the motor driving the thread-hooking needle. In the present application, after the sewing needle brings the upper thread through the fabric and continues to descend until the sewing needle reaches the positioning slot hole of the rotating shuttle fixing seat, the motor drives the thread-hooking needle to start running through the thread-hooking needle holder. The thread-hooking needle hooks the upper thread at the thread-hooking part of the sewing needle and rotates, and through the thread-dividing boss of the floating bobbin, the upper thread is wound around the floating bobbin for one week, and at the same time, the lower thread is taken off and the sewing needle continues to rise, driving the upper thread to perform the thread-taking work to complete a sewing operation; the lower thread is wound on the thread holder, the thread holder is installed in the inner cavity of the floating bobbin, and the lower thread end is led out outside the floating bobbin through the lead hole groove of the floating bobbin. Through the rotation of the above thread-hooking needle, the upper thread makes a full-wrap movement around the floating bobbin, tightens the upper thread to take off the lower thread, and drives the lower thread to be knotted and sewn with the fabric.

[0004] Furthermore, there is a positioning setting and a sliding line gap between the suspended shuttle core and the rotary hook fixing seat, the positioning connecting rod is indirectly / directly fixed to the base plate of the sewing machine head, and the rotary hook fixing seat is always in a static state when the sewing machine is running, which is a unique setting of the present application, and the rotary hook fixing seat has an inner arc surface.

[0005] Furthermore, the suspension shuttle core has a line dividing boss, a line sliding slope and a line sliding plane, the inner arc surface of the rotary shuttle fixing seat has a line sliding gap relative to the line sliding slope, and the line sliding plane has a line sliding gap relative to the anti-slip baffle. The motor drives the hook needle to hook the upper thread, so that the sewing thread is recycled after winding around the suspension shuttle core, and a hitch is formed each time the sewing thread is wound around the suspension shuttle core.

[0006] Furthermore, the positioning protrusion of the suspension bobbin abuts against the positioning groove of the rotary hook fixing seat, and the positioning setting ensures the reliability of the sliding thread gap. The front protrusion on the line dividing boss is provided with a machine needle positioning hole groove and a lower line lead-out groove, and the machine needle is parallel to the thread rack. Furthermore, the anti-slip baffle abuts against the front of the suspension bobbin and / or the thread rack, so that the position of the suspension bobbin and the thread rack is relatively stable, ensuring smooth sewing work.

[0007] Furthermore, the front end of the needle operates in the needle plate hole on the needle plate, the needle plate is perpendicular to the needle, the needle plate is above the hook needle and the suspended bobbin, the hook needle is directly opposite to the hook thread, and the front end of the needle tip of the needle is in the needle positioning hole groove of the suspended bobbin. The hook needle works with the rotary hook fixing seat and the suspended bobbin in a contactless manner, and the hook needle rotates with the motor outside the circumference of the line dividing boss of the suspended bobbin.

[0008] Furthermore, the motor is arranged behind the rotary hook fixing seat, and the motor drives the hook needle by performing circular rotation with the positioning connecting rod as the central axis, so that the motor of the present application can perform sewing tasks more efficiently.

[0009] Compared with the prior art, the beneficial effects of the present application are as follows: the suspended shuttle core and its thread rack of the present application are arranged in the inner cavity of a fixed rotary hook fixing seat, and the motor drives the hook needle to hook the upper thread of the machine needle, and drives the thread rack to output the thread in a contactless and frictionless process, so that the thread-hooking suspended rotary hook of the present application does not need to be operated at high speed like the prior art to realize sewing work, and realizes the static operation of the thread-hooking suspended rotary hook of the present application, and also makes the sewing equipment using the thread-hooking suspended rotary hook of the present application have better mechanical transmission efficiency. The thread-hooking suspended rotary hook of the present application has the advantages of no need for lubricating oil, no contact, no wear, and high lifespan, and does not need to match a complex speed change gear set, which improves the overall performance of the sewing machine and reduces the cost of the sewing machine. The thread-hooking suspended rotary hook of the present application has subverted the traditional sewing machine design and manufacturing thinking, and has a high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of a thread-hooking floating rotating shuttle of the present application;

[0011] Figure 2 is a side view of a thread-hooking floating rotating shuttle of the present application;

[0012] Figure 3 is an exploded view of a rotating shuttle fixing base, a floating bobbin and a thread holder of a thread-hooking floating rotating shuttle of the present application;

[0013] Figure 4 is a thread-hooking floating rotating shuttle of the present application Figure 2 enlarged view;

[0014] Figure 5 is a schematic diagram of the initial thread-hooking state of a thread-hooking floating rotating shuttle of the present application;

[0015] Figure 6 is a schematic diagram of the thread-off state of a thread-hooking floating rotating shuttle of the present application;

[0016] Figure 7 is a schematic diagram of the first sewing point of a thread-hooking floating rotating shuttle of the present application;

[0017] Figure 8 is a schematic diagram of a rotating shuttle fixing base vertically arranged for a thread-hooking floating rotating shuttle of the present application;

[0018] Figure 9 is a thread-hooking floating rotating shuttle of the present application Figure 8 partial enlarged view.

[0019] Reference numerals: sewing machine head 1, sewing needle 2, thread-hooking position 21, rotating shuttle fixing base 3, anti-slip baffle 31, positioning groove 32, inner arc surface 33, thread-hooking needle 5, thread holder 6, floating bobbin 7, positioning convex block 71, 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. Detailed Description of the Invention

[0020] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making the protection scope of the present application more clearly defined. These embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0021] Embodiment 1

[0022] Combined with Figure 1 Figure 2 Figure 3 and Figure 4A thread-hooking floating rotary shuttle of the present application includes a motor 91, a rotary shuttle fixing base 3, a floating bobbin core 7, a sewing needle 2, a positioning connecting rod 92, a thread stand 6, and a thread-hooking needle 5. The rotary shuttle fixing base 3 of the present application is fixed, that is, the rotary shuttle fixing base 3 is connected to the positioning connecting rod 92, and the rotary shuttle fixing base 3 and its positioning connecting rod 92 are stationary during the sewing process. The positioning connecting rod 92 is indirectly or directly fixed to the substrate (or base) of the sewing machine head 1. The sewing needle 2 has a thread-hooking portion 21 for the thread-hooking needle 5 to hook the thread.

[0023] The above-mentioned motor 91 has a hollow main shaft 911. The hollow main shaft 911 is the output shaft of the motor. There is a movable connection between the hollow main shaft 911 of the motor 91 and the positioning connecting rod 92. The positioning connecting rod 92 passes through the hollow main shaft 911, and a bearing 93 is provided between the hollow main shaft 911 and the positioning connecting rod 92. The motor 91 and the positioning connecting rod 92 are in a movable connection. The motor 91 is fixed to the sewing machine head 1, and the hollow main shaft 911 of the motor 91 drives the thread-hooking needle 5 to rotate. The above-mentioned positioning connecting rod 92 and the thread stand 6 are coaxially arranged.

[0024] The above-mentioned thread-hooking needle 5 is directly connected to the motor 91, or, as another implementation, there is a connecting body between the thread-hooking needle 5 and the motor 91, so that the motor 91 drives the thread-hooking needle 5 to rotate.

[0025] The motor 91 arranged in the bottom direction of the rotary shuttle fixing base 3 drives the thread-hooking needle 5 to make a circular motion with the positioning connecting rod 92 as the central axis, and the installation position and angle of the rotary shuttle fixing base 3 can be adjusted according to the requirements of different sewing equipment.

[0026] The above-mentioned rotary shuttle fixing base 3 has an anti-slip-out baffle 31. The above-mentioned rotary shuttle fixing base 3 has an anti-slip-out front baffle 31. When the anti-slip-out front baffle 31 is installed on the rotary shuttle fixing base 3, it may or may not be provided according to the usage of the thread stand 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 rotary shuttle fixing base 3. The above-mentioned anti-slip-out baffle 31 is provided and fixed on the rotary shuttle fixing base 3 in the form of a cover plate. The anti-slip-out baffle 31 abuts against the floating bobbin core 7 and / or the thread stand 6 during the sewing process, playing a role in laterally positioning the above-mentioned floating bobbin core 7 and the thread stand. Here, the connection method between the rotary shuttle fixing base 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, and the anti-slip-out baffle 31 can be opened or closed by pushing it to the side with hand. In addition, the above-mentioned anti-slip-out baffle 31 is arranged outside the range where the motor 91 drives the thread-hooking needle 5 to rotate.

[0027] The above-mentioned rotating shuttle fixing base 3 has an inner cavity that can accommodate the floating bobbin 7, and the floating bobbin 7 has an inner cavity that can accommodate the thread holder 6. Specifically, the above-mentioned thread holder 6 is placed in the inner cavity of the floating bobbin 7, and the floating bobbin 7 and the thread holder 6 are placed in the inner cavity of the rotating shuttle fixing base 3. Actually, the floating bobbin 7 together with the thread holder 6 is placed inside. When taking out, the floating bobbin 7 and the thread holder 6 are taken out from the inner cavity of the rotating shuttle fixing base 3. There is a positioning setting and a thread-sliding gap between the floating bobbin 7 and the rotating shuttle fixing base 3, and the rotating shuttle fixing base 3 also has a lower-thread leading-out hole.

[0028] The above-mentioned positioning setting is specifically: the above-mentioned floating bobbin 7 also has a positioning convex block 71 ( Figure 3 in the figure), and the positioning convex block 71 is arranged on the side close to the rotating shuttle fixing base 3; the rotating shuttle fixing base 3 also has a positioning groove 32, and the positioning groove 32 is arranged in a matching manner with the positioning convex block 71. When the floating bobbin 7 is placed in the inner cavity of the rotating shuttle fixing base 3, the positioning convex block 71 of the floating bobbin 7 is positioned in the positioning groove 32 of the rotating shuttle fixing base 3. The positioning convex block 71 plays a role in positioning the floating bobbin 7 in the rotating shuttle fixing base 3, ensuring the placement position of the floating bobbin 7 and also ensuring the free thread-sliding gap between the floating bobbin 7 and the rotating shuttle fixing base 3.

[0029] The above-mentioned thread-sliding gap means that the floating bobbin 7 has a thread-dividing boss 72, a front convex block 75, a thread-sliding inclined surface 73 and a thread-sliding flat surface 74 ( Figure 2 Figure 3 in the figure). The thread-sliding inclined surface 73 and the thread-sliding flat surface 74 are located on both sides of the thread-dividing boss 72. The thread-sliding inclined surface 73 of the above-mentioned floating bobbin 7 faces the inner arc surface 33 of the rotating shuttle fixing base 3, and there is a thread-sliding gap between the inner arc surface 33 and the thread-sliding inclined surface 73. There is a thread-sliding gap between the thread-sliding flat surface 74 and the anti-slip-out baffle 31. The function of the thread-dividing boss 72 is to divide the thread for sliding. The sewing thread slides over the thread-sliding inclined surface 73 and then over the thread-sliding flat surface 74 under the drive of the hook needle 5. The hook needle 5 rotates with the operation of the motor 91 on the outer circumference of the thread-dividing boss 72 of the floating bobbin 7. The front convex block 75 is arranged at the front end of the thread-dividing boss 72. The front convex block 75 has a needle positioning hole groove 711, and the front convex block 75 is provided with a lower-thread leading-out groove 76. Since there is a thread-sliding gap between the above-mentioned floating bobbin 7 and the rotating shuttle fixing base 3, it is beneficial for the sewing thread to bypass the thread-dividing boss 72 for sliding.

[0030] The above-mentioned hook needle 5 rotates with the operation of the motor 91 on the outer circumference of the thread-dividing boss 72 of the floating bobbin 7 and is on the tangent plane of the thread-hooking position 21. The sewing needle 2 is parallel to the thread holder 6, and the hook needle 5 is on the tangent plane of the thread-hooking position 21. In this embodiment, it is described with the sewing needle 2 being parallel to the thread holder 6 (parallel to the side of the thread holder 6).

[0031] The above-mentioned crochet hook 5 and the floating bobbin 7 and between the floating bobbins 7 work in a non-contact thread-hooking and thread-splitting cooperation. First, place the thread holder 6 into the inner cavity of the floating bobbin 7, then put the floating bobbin 7 together with the thread holder 6 into the rotary hook fixing base 3. The positioning lug 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 holder 6, and at the same time makes the anti-slip-out baffle 31 abut against the thread-sliding plane 74 of the floating bobbin 7; the thread-sliding inclined plane 73 on the thread-splitting boss 72 faces the rotary hook fixing base 3, so that the sewing thread slides over the thread-sliding plane 74 and the thread-sliding inclined plane 73 on both sides of the thread-splitting boss 72, forming a free thread-sliding gap, achieving the technical effect of non-contact thread-hooking and thread-splitting 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.

[0032] 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 thread-sliding plane 74 of the floating bobbin 7. When taking out the thread holder 6 that has used up the sewing thread, push the anti-slip-out baffle 31 away, and the thread holder 6 can be taken out from the floating bobbin 7; when loading the thread holder 6, place the thread holder 6 in the inner cavity of the floating bobbin 7 and lead the lower thread well, and cover the anti-slip-out baffle 31 to start sewing work; to take out the floating bobbin 7, push the anti-slip-out baffle 31 away, and the floating bobbin 7 together with the thread holder 6 is taken out from the inner cavity of the rotary hook fixing base 3.

[0033] Combined with the attached drawings, the crochet hook 5 of the present application is arranged outside the rotary hook fixing base 3. The needle positioning hole groove 711 of the front lug 75 allows the front end of the sewing needle 2 to rotate. The crochet hook 5 hooks the upper thread at the thread-hooking position 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 trajectory under the drive of the motor 91, and coordinates with the sewing needle 2 to achieve the sewing purpose of thread-hooking. The upper thread 1a of the sewing needle 2 performs sewing thread-hooking, and the pulling force of the crochet hook 5 on the upper thread 1a drives the thread holder 6 of the floating bobbin 7 to output the thread source. Under the operation of the motor 91, the crochet hook 5 and the sewing needle 2 coordinate with each other, so that the thread holder 6 can achieve sewing thread output at a relatively low rotational speed during sewing, while the rotary hook fixing base 3 and the floating bobbin 7 are static, overcoming the requirement of high-speed operation of the rotary hook in the prior art of sewing machines.

[0034] In Figure 5 Figure 6 and Figure 7In a thread-hooking floating rotary shuttle of the present application, first, the lower thread 1d is led to the lower-thread outlet groove 76. When the sewing needle 2 passes through the fabric with the upper thread 1a and reaches the needle positioning hole groove 711 of the floating bobbin 7, the motor 91 drives the thread-hooking needle 5 to hook the upper thread 1a at the thread-hooking position 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 thread-hooking needle 5 continues to rotate by 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 in the thread, tightens the upper thread 1a wound around the floating bobbin 7 and sleights the lower thread 1d to complete sewing.

[0035] Embodiment 2

[0036] In Figure 8 and Figure 9 In this Embodiment 2 is basically the same as the above Embodiment 1, except that in Embodiment 1, the sewing needle 2 is perpendicular to the thread stand 6 and there is also a needle plate 8. The front end of the sewing needle 2 mentioned above has a needle plate hole 81 on the needle plate 8 and the sewing needle 2 is perpendicular to the needle plate 8. The needle plate 8 is above the thread-hooking needle 5 and the floating bobbin 7. The thread-hooking needle 5 is on the tangent plane at the thread-hooking position 21. The sewing needle 2 passes through the needle plate 8 with the upper thread 1a to enter 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 thread-hooking needle 5 and the floating bobbin 7 and between the floating bobbins 7 work with non-contact thread-hooking and thread-dividing cooperation. The thread-hooking needle 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 thread-hooking needle 5 is different from that in Embodiment 1, but the realized thread-hooking process is the same. The above solution has the same technical effect as Embodiment 1 and should also fall within the protection scope of the present application.

[0037] The above is only the preferred embodiment of the present application and does 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 to other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A thread hooking suspension hook, comprising a thread rack (6) and a hook needle (5), It is characterized in that It also comprises a rotary hook fixing seat (3), a motor (91) and a positioning connecting rod (92); the thread rack (6) is placed in the inner cavity of the suspended bobbin core (7); the suspended bobbin core (7) and the thread rack (6) are placed in the inner cavity of the rotary hook fixing seat (3); the rotary hook fixing seat (3) is connected to the positioning connecting rod (92); the motor (91) comprises a hollow main shaft (911); the hollow main shaft (911) is dynamically connected to the positioning connecting rod (92); and the hollow main shaft (911) is connected to the hook needle (5); The suspended shuttle core (7) comprises a positioning protrusion (71), a line dividing protrusion (72), a front protrusion (75), a line sliding inclined surface (73) and a line sliding plane (74); the line sliding inclined surface (73) and the line sliding plane (74) are located on both sides of the line dividing protrusion (72); the rotary hook fixing seat (3) comprises a positioning groove (32) and an inner arc surface (33); a line sliding gap is provided between the suspended shuttle core (7) and the rotary hook fixing seat (3); the positioning protrusion (71) abuts against the positioning groove (32) and the inner arc surface (33); The positioning groove (32) is provided with a sliding line gap between the inner arc surface (33) and the sliding line inclined surface (73); the anti-slip baffle (31) is provided at the front of the rotary hook fixing seat (3), and the sliding line gap is provided between the sliding line plane (74) and the anti-slip baffle (31); the front protrusion (75) is provided at the front end of the line dividing boss (72), the front protrusion (75) has a needle positioning hole groove (711), and the front protrusion (75) is provided with a lower line lead-out groove (76); The motor (91) drives the hook needle (5) by rotating in a circle with the positioning connecting rod (92) as the central axis. The hook needle (5) rotates along with the motor (91) on the outer side of the circle of the line dividing boss (72). The positioning connecting rod (92) is indirectly or directly fixed on the base plate of the sewing machine head (1). During the sewing process, the rotary hook fixing seat (3) is stationary.

2. A thread hook suspension hook according to claim 1, It is characterized in that The anti-slip baffle (31) abuts against the front of the suspended bobbin (7) and / or the thread rack (6).

3. A thread hook suspension hook according to claim 1, It is characterized in that The hook needle (5) works in a contactless manner with the suspended shuttle core (7) and the rotary shuttle fixing seat (3).

4. A thread hook suspension hook according to claim 1, It is characterized in that The machine tool also has a needle plate (8), the needle plate (8) is located above the hook needle (5) and the suspended bobbin (7), the needle plate (8) has a needle plate hole (81), the front end of the machine needle (2) operates in the needle plate hole (81), the machine needle (2) has a hooking point (21), and the hook needle (5) is directly opposite to the hooking point (21).

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