A thread-hooking suspended rotary shuttle

Abstract

This application proposes 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 cars, and specifically relates to the technical field of sewing machine manufacturing. It includes a wire rack intelligently placed in the inner cavity of the floating bobbin, the floating bobbin and the wire rack are placed in the inner cavity of the rotating shuttle fixing seat, the rotating shuttle fixing seat is connected to the positioning connecting rod, an anti-slip-out baffle is arranged at the front part of the rotating shuttle fixing seat, the power source has a hollow main shaft, a bearing is arranged between the positioning connecting rod and the hollow main shaft, and the power source is connected to a hooking needle. The thread-hooking floating rotating shuttle of this application has the advantages of no need for lubricating oil, no wear, high life, does not require matching complex speed-changing gear sets, improves the overall performance of the sewing machine, reduces the cost of the sewing machine, and subverts the traditional sewing machine design and manufacturing thinking, 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 devices using rotating shuttles, such as household sewing machines, industrial flat-sewing machines, thick-material sewing 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 and has made significant contributions to the development of the clothing industry in human society, 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 during use, and the failure rate is also high, resulting in a relatively short service life. During sewing, when the rotating shuttle is running at high speed, lubricating grease needs to be added 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] In view of the above technical deficiencies of the rotating shuttle of existing sewing equipment, the present application breaks through the conventional sewing machine design concept and introduces and produces a thread-hooking floating rotating shuttle with no contact, no friction, and no need for oil lubrication, which is convenient to apply and has a long service life. The thread-hooking floating rotating shuttle includes a thread holder, a thread-hooking needle, and a power source. It is characterized in that 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 arranged at the front part of the rotating shuttle fixing seat, the power source has a hollow main shaft, a bearing is arranged between the positioning connecting rod and the hollow main shaft, the power source is connected to the thread-hooking needle, and the anti-slip-out baffle is arranged outside the range where the power source drives the thread-hooking needle to operate. In the present application, after the sewing needle brings the upper thread through the fabric and continues to move downward until the sewing needle reaches the positioning slot hole of the rotating shuttle fixing seat, the power source 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 up and the sewing needle continues to move upward, and the upper thread is taken for the thread-taking work to complete a sewing work; 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-mentioned thread-hooking needle, the upper thread makes a full-wrap movement around the floating bobbin, tightens the upper thread, takes up the lower thread, and stitches the lower thread 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 power source 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 knot 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 operates with the power input source outside the circumference of the line dividing boss of the suspended bobbin.

[0008] Furthermore, the power source is arranged behind the rotary hook fixing seat, and the power source drives the hook needle by performing circular rotation with the positioning connecting rod as the central axis, so that the power source 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 power source 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 life, 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 magnified 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 vertically arranged rotating shuttle fixing base of 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 protrusion 71, thread-dividing boss 72, thread-sliding inclined surface 73, thread-sliding flat surface 74, front protrusion 75, lower thread leading-out groove 76, needle plate 8, needle plate hole 81, power source 91, hollow main shaft 911, positioning connecting rod 92, bearing 93, upper thread 1a, lower thread 1d, thread-off position 1c. Detailed implementation manners

[0020] The preferred embodiments of the present application will be described in detail below in conjunction with 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 a clearer and more definite definition of the protection scope of the present application. These implementation manners 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 rotating shuttle of the present application includes a power source 91, a rotating shuttle fixing base 3, a floating bobbin 7, a sewing needle 2, a positioning connecting rod 92, a thread stand 6, and a thread-hooking needle 5. The rotating shuttle fixing base 3 of the present application is a fixed type, that is, the rotating shuttle fixing base 3 is connected to the positioning connecting rod 92, and during the sewing process, the rotating shuttle fixing base 3 and its positioning connecting rod 92 are stationary. 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 portion 21 for the thread-hooking needle 5 to hook the thread.

[0023] The power source 91 of the present application receives power from a power device such as an electromagnet. Here, the power source 91 is preferably a shaft rotation power source. The above power source 91 has a hollow main shaft 911, and the hollow main shaft 911 is a power output shaft. 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 power source 91 and the positioning connecting rod 92 are movably connected. The power source 91 is fixed on the sewing machine head 1, and the hollow main shaft 911 of the power source 91 drives the thread-hooking needle 5 to operate. The above positioning connecting rod 92 and the thread stand 6 are coaxially arranged.

[0024] The above thread-hooking needle 5 is directly connected to the power source 91, or, as another implementation manner, a connecting body is provided between the thread-hooking needle 5 and the power source 91, so that the power source 91 drives the thread-hooking needle 5 to operate.

[0025] The power source 91 arranged in the bottom direction of the rotating 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 rotating shuttle fixing base 3 can be adjusted according to the requirements of different sewing equipment.

[0026] The above rotating shuttle fixing base 3 has an anti-slip-out baffle 31. The above rotating shuttle fixing base 3 has an anti-slip-out front baffle 31. When the anti-slip-out front baffle 31 is installed on the rotating shuttle fixing base 3, it may or may not be provided according to the usage situation 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 rotating shuttle fixing base 3. The above anti-slip-out baffle 31 is provided and fixed on the rotating shuttle fixing base 3 in the form of a cover plate. The anti-slip-out baffle 31 abuts against the floating bobbin 7 and / or the thread stand 6 during the sewing process, playing a role in laterally positioning the above floating bobbin 7 and the thread stand. Here, the connection manner between the rotating 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 anti-slip-out baffle 31 is arranged outside the range where the power source 91 drives the thread-hooking needle 5 to operate.

[0027] The above-mentioned rotary hook 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 rotary hook 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 rotary hook fixing base 3. There is a positioning setting and a thread-sliding gap between the floating bobbin 7 and the rotary hook fixing base 3, and the rotary hook fixing base 3 also has a lower thread leading-out hole.

[0028] The above-mentioned positioning setting is specifically as follows: The above-mentioned floating bobbin 7 also has a positioning bump 71 ( Figure 3 as shown in the figure), and the positioning bump 71 is arranged on the side close to the rotary hook fixing base 3; the rotary hook fixing base 3 also has a positioning groove 32, and the positioning groove 32 is arranged to match the positioning bump 71. When the floating bobbin 7 is placed in the inner cavity of the rotary hook fixing base 3, the positioning bump 71 of the floating bobbin 7 is positioned in the positioning groove 32 of the rotary hook fixing base 3. The positioning bump 71 plays a role in positioning the floating bobbin 7 in the rotary hook 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 rotary hook fixing base 3.

[0029] The above-mentioned thread-sliding gap means that: The floating bobbin 7 has a thread-dividing boss 72, a front bump 75, a thread-sliding inclined surface 73 and a thread-sliding flat surface 74 ( Figure 2 Figure 3 as shown 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 rotary hook 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 along with the power input source on the outer circumference of the thread-dividing boss 72 of the floating bobbin 7. The front bump 75 is arranged at the front end of the thread-dividing boss 72. The front bump 75 has a needle positioning hole groove 711, and the front bump 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 rotary hook 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 along with the power input source 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 crochet hook 5 and the floating bobbin 7 and between the floating bobbins 7 cooperate to work without contact for threading and separating the thread. First, place the thread stand 6 into the inner cavity of the floating bobbin 7, then place 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 thread-sliding plane 74 of the floating bobbin 7; the thread-sliding inclined plane 73 on the thread-separating convex platform 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-separating convex platform 72, forming a free thread-sliding gap, achieving the technical effect of non-contact threading and thread separation of the sewing thread on a threading 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 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 the lower thread well, and 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 the floating bobbin 7 together with the thread stand 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 convex block 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 driven by the power source 91. The crochet hook 5 is connected to the power source 91, and the crochet hook 5 generates a corresponding thread-hooking movement track driven by the power source 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 stand 6 of the floating bobbin 7 to output the thread source. Under the operation of the power source 91, the crochet hook 5 and the sewing needle 2 coordinate with each other, so that the thread stand 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 for high-speed rotation of the rotary hook in the prior art of sewing machines.

[0034] In Figure 5 Figure 6 and Figure 7In a thread-hooking floating rotating shuttle of the present application, first, the lower thread 1d is led to the lower-thread leading-out groove 76. When the sewing needle 2 passes through the fabric with the upper thread 1a and reaches the sewing-needle positioning hole groove 711 of the floating bobbin 7, the power input source 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-dropping position 1c and starts to drop 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 Embodiment 1 described above. The difference is 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 operates in the needle-plate hole 81 on the needle plate 8. 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 tangential 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 are in non-contact thread-hooking and thread-dividing cooperative work. The thread-hooking needle (5) rotates along with the power input source 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 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 to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A thread-hooking floating rotating shuttle, comprising a thread holder (6), a thread-hooking needle (5) and a power source (91), characterized in that, It also has a floating bobbin (7), a positioning connecting rod (92) and a rotary hook fixing seat (3). The wire frame (6) is placed in the inner cavity of the floating bobbin (7). The floating bobbin (7) and the wire frame (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 power source (91) is connected to the needle hook (5). The power source (91) makes a circular motion with the positioning connecting rod (92) as the central axis and drives the needle hook (5). The floating bobbin (7) has a positioning bump (71), a wire separating boss (72), a wire sliding inclined surface (73), a front bump (75) and a wire sliding plane (74). The needle hook (5) runs along the outer circumference of the wire separating boss (72) with the power input source (91). The needle hook (5) works in non-contact cooperation with the floating bobbin (7) and the rotary hook fixing seat (3). The power source (91) is a shaft rotation power source. The positioning bump (71) abuts against the positioning groove (32) on the rotary hook fixing seat (3). There is a wire sliding gap between the floating bobbin (7) and the rotary hook fixing seat (3). The rotary hook fixing seat (3) has an inner arc surface (33). There is a wire sliding gap between the inner arc surface (33) and the wire sliding inclined surface (73). An anti-slip-out baffle (31) is arranged at the front part of the rotary hook fixing seat (3). There is a wire sliding gap between the wire sliding plane (74) and 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 wire frame (6). The front bump (75) is arranged at the front end of the wire separating boss (72). The front bump (75) has a sewing needle positioning hole groove (711). The front bump (75) is provided with a lower thread leading-out groove (76).

2. The loop-hooking floating rotary shuttle according to claim 1, wherein, The power source (91) has a hollow main shaft (911). A bearing (93) is arranged between the positioning connecting rod (92) and the hollow main shaft (911). The hollow main shaft (911) is connected to and drives the needle hook (5).

3. A thread-hooking floating rotating shuttle according to claim 1, characterized in that, The positioning connecting rod (92) is indirectly or directly fixed on the base plate of the sewing machine head (1).

4. A thread-hooking floating rotating shuttle according to claim 1, characterized in that, It also has a sewing needle (2) and a needle plate (8). The needle plate (8) is located above the needle hook (5) and the floating bobbin (7). The sewing needle (2) has a thread hooking part (21). The needle hook (5) is directly opposite to the thread hooking part (21).

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