A thread-hooking suspended rotating shuttle

Abstract

The present application provides a thread-hooking floating rotating shuttle, which specifically relates to the technical field of sewing machine manufacturing. The thread holder is placed in the inner cavity of the floating bobbin, the floating bobbin is placed in the inner cavity of the rotating shuttle fixing seat, there is a positioning arrangement between the floating bobbin and the rotating shuttle fixing seat, the rotating shuttle fixing seat is fixed, an anti-slip-out baffle is arranged at the front part of the rotating shuttle fixing seat, the power source is connected to drive the hooking needle, and the power source is arranged at the lower part of the rotating shuttle fixing seat. The thread-hooking floating rotating shuttle of the present application has the advantages of no need for lubricating oil, no wear, high life, does not 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 rotating shuttle applied for in the present application subverts the traditional sewing machine design and manufacturing concept and has high popularization value.

Description

Technical Field

[0001] The present application provides a thread-hooking floating rotary hook. The thread-hooking floating rotary hook of this solution is applied to various sewing equipment using rotary hooks, 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. 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 rotary hook still follows the original solution, and the implemented technical principle remains the same. As a key component of sewing equipment, the rotary hook has high requirements in production and manufacturing, and the production cost is also high. In addition, the rotary hook 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 rotary hook rotates at a high speed, it is necessary to add grease to the rotary hook body and the high-speed rotating parts of the rotating shaft. In addition, the high-speed rotating rotary hook requires the mechanical transmission system of the sewing machine to support, and a complex speed-changing gear set needs to be matched, artificially increasing the cost of the sewing machine. The lubrication of the rotary hook and its rotating shaft causes pollution to the sewing thread and fabric, reducing the sewing quality; the high-speed operation of the rotary hook 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 rotary hook of existing sewing equipment, the present application breaks the conventional sewing machine design concept to achieve and produce a thread-hooking floating rotary hook with non-contact friction and no oil lubrication, and has a thread-hooking floating rotary hook that is convenient to apply and has a long service life. It includes a thread holder, a hooking needle, a sewing 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 is placed in the inner cavity of the rotary hook fixing seat, there is a positioning setting and a thread-sliding gap between the floating bobbin and the rotary hook fixing seat, the rotary hook fixing seat is fixed, an anti-slip-out baffle is arranged at the front part of the rotary hook fixing seat, the power source is connected to drive the hooking needle, the power source is arranged below the rotary hook fixing seat, the sewing needle runs in the needle plate, and the sewing needle is perpendicular to the rotary hook fixing seat.

[0004] The sewing needle of the present application takes the upper thread through the fabric and then continues to descend until the sewing needle reaches the outside of the thread-dividing boss. The power source drives the hooking needle to start running through the hooking needle holder. The hooking needle hooks the upper thread at the thread-hooking place of the sewing needle and rotates, and makes the upper thread go around the floating bobbin through the thread-dividing boss of the floating bobbin, and takes down the lower thread while the sewing needle continues to ascend, and takes the upper thread to do the thread-taking work to complete a sewing work.

[0005] The lower thread is wound around the thread holder. The thread holder is inserted into the inner cavity of the floating bobbin core. The lower thread end is led out outside the floating bobbin core through the lead hole groove of the floating bobbin core. By rotating the above-mentioned latch needle, the upper thread is wrapped around the floating bobbin core completely, the upper thread sleeve is tightened to pick up the lower thread and stitch the lower thread with the fabric sleeve.

[0006] Further, the rotary hook fixing base is indirectly or directly fixed on the base plate of the sewing machine head. There is a positioning setting and a thread-sliding gap between the floating bobbin core and the rotary hook fixing base. The floating bobbin core has a thread-dividing boss, a thread-sliding inclined surface and a thread-sliding flat surface. The inner arc surface of the rotary hook fixing base 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.

[0007] Further, the anti-slip-out baffle abuts against the upper part of the floating bobbin core and / or the thread holder.

[0008] Further, the positioning setting is that the positioning convex block of the floating bobbin core abuts against the positioning groove of the rotary hook fixing base. The positioning convex block is positioned in the positioning groove, so that there is a positioning limit for placing the floating bobbin core and the rotary hook fixing base, making the floating bobbin core more stable after being placed.

[0009] Further, the tip of the sewing needle is in front of the needle plate hole of the floating bobbin core. The latch needle and the rotary hook fixing base and the floating bobbin core work in a non-contact fit. The latch needle rotates outside the circumference of the thread-dividing boss of the floating bobbin core with the power source. The power source is arranged below the rotary hook fixing base, and the power source reciprocates within a certain rotation angle.

[0010] Compared with the prior art, the beneficial effects of the present application are as follows: The floating bobbin core of the present application is configured in the inner cavity of the fixed rotary hook fixing base. The process of the power source driving the latch needle and then driving the bottom thread out has no contact friction, so that the thread-hooking floating rotary hook of the present application does not need to rotate at a high speed like the prior art to realize the sewing work, realizing the static work of the thread-hooking floating rotary hook of the present application, and also making the sewing equipment applying the thread-hooking floating rotary hook of the present application have better mechanical transmission efficiency. A thread-hooking floating rotary hook of the present application has the advantages of no need for lubricating oil, no contact, no wear and long service life. It 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 thread-hooking floating rotary hook of the present application has subverted the traditional sewing machine design and manufacturing thinking and has high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 2 is an enlarged view of the needle plate and the latch needle of a thread-hooking floating rotary hook of the present application;

[0013] Figure 3 It is an internal schematic diagram of a thread-hooking floating rotary shuttle of the present application;

[0014] Figure 4 It is an exploded view of the rotary shuttle fixing base, floating bobbin core and thread holder of a thread-hooking floating rotary shuttle of the present application;

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

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

[0017] Figure 7 It is a schematic diagram of the first sewing point of a thread-hooking floating rotary shuttle of the present application.

[0018] Reference numerals:

[0019] Sewing machine head 1, sewing needle 2, thread-hooking position 21, rotary 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, thread-dividing boss 72, thread-sliding inclined surface 73, thread-sliding flat surface 74, thread-sliding inclined surface 73, needle plate 8, needle plate hole 81, power source 9, 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 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 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] Combined with Figure 1 Figure 2 Figure 3 and Figure 4 , a thread-hooking floating rotary shuttle of the present application has a power source 9, a rotary shuttle fixing base 3, a floating bobbin core 7, a sewing needle 2, a thread holder 6 and a thread-hooking needle 5. The rotary shuttle fixing base 3 of the present application is a fixed type, that is, the rotary shuttle fixing base 3 is fixed on the sewing equipment, and the rotary shuttle fixing base 3 is stationary during the sewing process. In this embodiment, the rotary shuttle fixing base 3 is indirectly or directly fixed on the substrate (base) of the sewing machine head 1.

[0022] The above-mentioned power source 9 is connected to the thread-hooking needle 5, or, as another implementation manner, a connecting body is provided between the thread-hooking needle 5 and the power source 9, so that the thread-hooking needle 5 and the power source 9 are fixedly connected.

[0023] The above-mentioned crochet needle 5 receives the power from the power source 9, and the power source 9 is arranged below the rotary hook fixing base 3. The above-mentioned rotary hook fixing base 3 and the floating bobbin 7 are perpendicular to the sewing needle 2 to adapt to the upward setting of the rotary hook fixing base 3. Specifically, since the power source 9 is arranged below the rotary hook fixing base 3, the power source 9 reciprocates within a certain angular range to drive the crochet needle 5 to operate. In this way, the fixing method of the rotary hook fixing base 3 is flexible corresponding to the power source 9. No matter how the power source 9 is inclined below the rotary hook fixing base 3, it is within the protection scope of this application.

[0024] The power source 9 of this application can receive power devices such as electromagnetic and pneumatic power. Here, the power source 9 is preferably a shaft rotation power source.

[0025] The above-mentioned rotary hook fixing base 3 is provided with an anti-slip-out baffle 31. The above-mentioned rotary hook fixing base 3 is provided with an anti-slip-out front baffle 31. When the anti-slip-out front baffle 31 is installed on the rotary hook fixing base 3, it may or may not be provided according to the usage 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 fixed on the rotary hook fixing base 3. The above-mentioned anti-slip-out baffle 31 is arranged on the rotary hook fixing base 3 in the form of a cover plate. The anti-slip-out baffle 31 abuts against the upper part of the floating bobbin 7 and / or the wire holder 6 during sewing (the side of the floating bobbin and the wire holder 6 close to the anti-slip-out baffle 31 is the upper part), and is used for positioning the above two. Here, the connection method between the above-mentioned rotary hook fixing base 3 and the anti-slip-out baffle 31 of this application can also be a positioning connection, and the anti-slip-out baffle 31 can be opened and closed by pushing it to the side with hand.

[0026] The inner cavity of the above-mentioned rotary hook fixing base 3 is provided with a floating bobbin 7 and a wire holder 6: The above-mentioned wire holder 6 is placed in the inner cavity of the floating bobbin 7, and the above-mentioned floating bobbin 7 is placed in the inner cavity of the rotary hook fixing base 3. There is a positioning setting between the floating bobbin 7 and the rotary hook fixing base 3. The floating bobbin 7 has a wire dividing boss 72, a wire sliding inclined surface 73 and a wire sliding flat surface 74 ( Figure 2 Figure 3 as shown in the figure), the wire sliding inclined surface 73 and the wire sliding flat surface 74 are located on both sides of the wire dividing boss 72. The wire 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 wire sliding gap between the inner arc surface 33 and the wire sliding inclined surface 73. There is a wire sliding gap between the wire sliding flat surface 74 and the anti-slip-out baffle 31. The function of the wire dividing boss 72 is to divide the wire and let the sewing thread slide over the wire sliding inclined surface 73 and the wire sliding flat surface 74 in turn under the drive of the crochet needle 5. The crochet needle 5 operates with power input on the outer circumference of the wire dividing boss 72 of the floating bobbin 7. Since there is a wire 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 wire dividing boss 72 for wire sliding.

[0027] There is a positioning setting between the above-mentioned floating bobbin 7 and the rotary hook fixing base 3. Specifically: The above-mentioned floating bobbin 7 also has a positioning convex block 71 ( Figure 4In the middle), the rotary hook fixing base 3 also has a positioning groove 32. 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 located in the positioning groove 32 of the rotary hook fixing base 3, which plays a role in positioning the floating bobbin 7 on the rotary hook fixing base 3, ensuring the placement position of the floating bobbin 7, ensuring a fixed position of the floating bobbin 7 when the wire is led out from the wire frame 6, and the free wire sliding gap between the floating bobbin 7 and the rotary hook fixing base 3. The sewing needle 2 operates in the needle plate hole 81 on the needle plate 8. The needle plate 8 is perpendicular to the sewing needle 2. The needle plate 8 is above the loop-pulling needle 5, and the loop-pulling needle 5 is facing the thread-pulling position 21.

[0028] The above-mentioned sewing needle 2 runs in the needle plate 8, and the sewing needle 2 works outside the floating bobbin 7. After the wire frame 6 is installed in the inner cavity of the floating bobbin 7, the above-mentioned floating bobbin 7 together with the wire frame 6 is placed into the inner cavity of the rotary hook fixing base 3 from above the rotary hook fixing base 3, and the anti-slip-out baffle 31 is covered. The anti-slip-out baffle 31 abuts against the floating bobbin 7 and / or the wire frame 6, playing a role in restricting the wire frame 6.

[0029] The floating bobbin 7 and the wire frame 6 placed in the inner cavity of the above-mentioned rotary hook fixing base 3 achieve the non-contact wear sewing of the loop-pulling 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 does not rely on the power source 9 to drive for sewing work. The rotary hook fixing base 3 does not need to be equipped with a mechanical speed change to increase the operating speed. The rotary hook fixing base 3 is static during sewing. The power source 9 of the present application performs reciprocating rotation within a certain rotation angle to drive the loop-pulling needle 5 and its related components to achieve sewing work.

[0030] 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 abuts against the wire sliding plane 74 of the floating bobbin 7. When taking out the wire frame 6 with the used sewing thread, push the anti-slip-out baffle 31 away, and the floating bobbin 7 and the wire frame 6 can be taken out from the rotary hook fixing base 3.

[0031] For Figure 5 Figure 6 And Figure 7 Combined with other drawings, the loop-pulling needle 5 of the present application is arranged outside the rotary hook fixing base 3. The loop-pulling needle 5 hooks the upper thread on the thread-pulling position 21 of the outer sewing needle 2 under the drive of the power source 9. The loop-pulling needle 5 is connected to the power source 9. The power source 9 performs reciprocating rotation within a certain rotation angle. The power source 9 is arranged below the rotary hook fixing base 3. This is determined by the arrangement of the power source 9 to determine the rotation direction, so that the loop-pulling needle 5 generates a corresponding thread-pulling movement trajectory and coordinates with the sewing needle 2 to achieve the sewing purpose of thread-pulling.

[0032] Driven by the power source 9, the crochet needle 5 sews and hooks the upper thread 1a of the sewing needle 2. The pulling force of the crochet needle 5 on the upper thread 1a drives the wire frame 6 of the floating bobbin 7 to output the wire source. The crochet needle 5 works in non-contact cooperation with the rotary hook fixing seat 3 and the floating bobbin 7. Since the power source 9 generates reciprocating rotation within the corner, there is no contact friction between the crochet needle 5, the rotary hook fixing seat 3 and the floating bobbin 7, overcoming the requirement for high-speed rotation of the rotary hook in the existing sewing machine technology.

[0033] In Figure 5 Figure 6 and Figure 7 of this application, when the sewing needle 2 with the upper thread 1a passes through the fabric and reaches the sewing needle positioning hole groove 711 of the floating bobbin 7, the power input source drives the crochet needle 5 at the wire hooking position 21 to hook the upper thread 1a. The hooked upper thread 1a is divided into a front line and a back line by the wire dividing boss 72 of the floating bobbin 7. The crochet needle 5 continues to rotate more than 180 degrees to reach the thread releasing 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.

[0034] The above is only the preferred embodiment of this application, and does not limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of this application by the same token.

Claims

1. A thread-hooking suspended rotary shuttle, comprising a thread stand (6), a thread-hooking needle (5), a sewing needle (2) and a power source (9), characterized in that, It also has a floating bobbin (7), a rotary hook fixing base (3) and an anti-slip-out baffle (31). The wire holder (6) is placed in the inner cavity of the floating bobbin (7). The floating bobbin (7) and the wire holder (6) are placed in the inner cavity of the rotary hook fixing base (3). The rotary hook fixing base (3) is fixed. The floating bobbin (7) has a positioning bump (71), a wire separating boss (72), a wire sliding inclined surface (73) and a wire sliding flat surface (74). The rotary hook fixing base (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). There is a wire sliding gap between the wire sliding flat surface (74) and the anti-slip-out baffle (31). The positioning bump (71) abuts against the positioning groove (33). The power source (9) is connected to drive the latch needle (5). The latch needle (5) runs outside the circumference of the wire separating boss (72) with the input of power. The latch needle (5) is directly opposite to the thread hooking position (21). The sewing needle (2) runs in the needle plate (8). The sewing needle (2) is perpendicular to the rotary hook fixing base (3). The power source (9) is arranged below the rotary hook fixing base (3).

2. The loop-hooking floating rotating shuttle according to claim 1, wherein, The rotary hook fixing base (3) is indirectly or directly fixed on the base plate of the sewing machine head (1). The front part of the rotary hook fixing base (3) is provided with an anti-slip-out baffle (31).

3. A thread-hooking floating rotating shuttle according to claim 1, characterized in that, The anti-slip-out baffle (31) abuts against the upper part of the floating bobbin (7) and / or the wire holder (6).

4. A thread-hooking suspended rotating shuttle according to claim 1, characterized in that, There is a positioning arrangement between the floating bobbin (7) and the rotary hook fixing base (3).

5. A thread-hooking floating rotary shuttle according to claim 1, characterized in that, The sewing needle (2) operates in the needle plate hole (81) on the needle plate (8). The needle plate (8) is perpendicular to the sewing needle (2). The needle plate (8) is above the latch needle (5).

6. The loop-hooking floating rotary shuttle according to claim 1, wherein, The latch needle (5) works in non-contact cooperation with the rotary hook fixing base (3) and the floating bobbin (7).

7. A thread-hooking floating rotary shuttle according to claim 1, characterized in that, The power source (9) is arranged at the lower part of the rotary hook fixing base (3). The power source (9) reciprocates within a certain rotation angle.

8. A thread-hooking suspended rotating shuttle according to claim 1, wherein, The power source (9) is a shaft rotation power source.

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