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. The bobbin thread is led out by a floating bobbin, and the floating bobbin is placed in the inner cavity of the rotary shuttle fixing seat. There is a thread-sliding gap and a positioning arrangement between the floating bobbin and the rotary shuttle fixing seat. The rotary shuttle fixing seat is fixed, and the rotary shuttle fixing seat remains stationary during the operation of the sewing machine. In the present application, the floating bobbin and its wire frame are arranged in the inner cavity of the fixed rotary shuttle fixing seat. The process of the power source driving the hooking needle to drive the wire frame to release the thread is contactless and frictionless, so that the thread-hooking floating rotary shuttle of the present application does not need to operate at a high speed like the prior art to achieve sewing work, realizing the static operation of the thread-hooking floating rotary shuttle of the present application, and also making the sewing equipment applying the thread-hooking floating rotary shuttle of the present application have better mechanical transmission efficiency.

Description

Technical Field

[0001] The present application provides a thread-hooking floating rotary shuttle. The thread-hooking floating rotary shuttle of this solution is applied to various sewing devices using rotary 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 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 shuttle still follows the original solution, and the implemented technical principle remains the same. As a key component of sewing equipment, the rotary shuttle has high requirements in production and manufacturing, and the production cost is also high. In addition, the rotary 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 rotary shuttle is running at a high speed, it is necessary to add grease to the rotary shuttle body and the high-speed rotating parts of the rotating shaft. In addition, the high-speed rotating rotary 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 rotary shuttle and its rotating shaft causes pollution to the sewing thread and fabric, reducing the sewing quality; the high-speed operation of the rotary 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 rotary shuttle of existing sewing equipment, the present application breaks the conventional design concept to achieve and produce a thread-hooking floating rotary shuttle without contact, friction, and oil lubrication, which is easy to use and has a long service life. The thread-hooking floating rotary shuttle includes a bobbin thread, a hooking needle, and a power input source. It is characterized in that the bobbin thread is led out from a floating bobbin, the floating bobbin is placed in the inner cavity of a rotary shuttle fixing seat, there is a thread-sliding gap and a positioning setting between the floating bobbin and the rotary shuttle fixing seat, the rotary shuttle fixing seat is fixed, and the rotary shuttle fixing seat is stationary when the sewing machine is running. An anti-slip front baffle is provided at the front of the rotary shuttle fixing seat, and an anti-slip rear baffle is provided at the rear of the rotary shuttle fixing seat. The power input source is connected to the hooking needle, the power input source is connected to a fixed hooking needle holder, and the hooking needle rotates with the power input source outside the thread-dividing boss of the floating bobbin. The operation mode of the rotary shuttle fixing seat of the present application is different from that of the existing rotary shuttle. It does not rely on the power input source to drive the rotary shuttle to operate for sewing work. The rotary shuttle fixing seat and the floating bobbin are static during sewing.

[0004] Preferably, the bottom line is wound inside the wire holder. The rotating hook fixing base of the present application is indirectly or directly fixed on the substrate of the sewing machine head, and the power input source is a shaft rotation power source. The floating bobbin has a wire sliding inclined surface located in the inner cavity of the rotating hook fixing base, and the floating bobbin also has an inner cavity for accommodating the wire holder. In the positioning arrangement between the above-mentioned floating bobbin and the rotating hook fixing base, the floating bobbin also has a positioning bump, and the rotating hook fixing base also has a positioning groove. When the floating bobbin is placed in the inner cavity of the rotating hook fixing base, the positioning bump of the floating bobbin abuts against the positioning groove of the floating bobbin. The positioning of the positioning bump in the positioning groove restricts the placement of the floating bobbin and the rotating hook fixing base, and forms a reference point for taking up the thread, so that the sewing needle also has a corresponding operating position, and the tip of the sewing needle is located in the needle hole of the floating bobbin.

[0005] Preferably, the floating bobbin has a thread dividing boss, and there is a wire sliding gap between the floating bobbin and the rotating hook fixing base. The floating bobbin has a thread dividing boss, a wire sliding inclined surface and a wire sliding plane. The inner arc surface of the rotating hook fixing base has a wire sliding gap relative to the wire sliding inclined surface, and the wire sliding plane has a wire sliding gap relative to the anti-slip front baffle. The barbed needle works in a non-contact and non-wearing fit with the rotating hook fixing base and the floating bobbin, and the barbed needle rotates with the power input source on the outer circumference of the thread dividing boss of the floating bobbin.

[0006] Preferably, the anti-slip front baffle cover abuts against the front part of the floating bobbin, and the anti-slip rear baffle cover abuts against the rear part of the floating bobbin.

[0007] Preferably and generally, the power input source is arranged at the front of the rotating hook fixing base, then the power input source reciprocates within a certain rotation angle / or rotates in a circle to drive the barbed needle to rotate; the power input source is arranged at the rear of the rotating hook fixing base, then the power input source reciprocates within a certain rotation angle to drive the barbed needle to rotate. The above arrangement of the power input source reflects that the present application realizes power input according to different sewing machine structures and has high applicability.

[0008] Preferably, the connection mode between the anti-slip front baffle and the rotating hook fixing base is a positioning connection. At the same time, the connection mode between the anti-slip front baffle and the rotating hook fixing base achieves the same effect in various connection modes. The connection mode between the anti-slip rear baffle and the rotating hook fixing base is a positioning connection.

[0009] Compared with the prior art, the beneficial effects of the present application are as follows: The floating bobbin of the present application is arranged in the inner cavity of the fixed rotary hook seat. In the process where the power source drives the needle hook and then drives the thread frame to release the thread, there is no contact and no friction, so that the sewing operation of the thread-hooking floating rotary hook of the present application does not need to rotate at a high speed as in the prior art to achieve the sewing work, realizing the static operation 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 be matched with a complex speed-changing gear set, improves the overall performance of the sewing machine, reduces the cost of the sewing machine, and subverts the traditional design and manufacturing thinking of the sewing machine, having high promotion value. Brief Description of the Drawings

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

[0011] Figure 2 is a position diagram of the needle hook holder of a thread-hooking floating rotary hook of the present application;

[0012] Figure 3 is an exploded view of the rotary hook seat and the floating bobbin of a thread-hooking floating rotary hook of the present application;

[0013] Figure 4 is an enlarged view of the needle hook holder of a thread-hooking floating rotary hook of the present application;

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

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

[0016] Figure 7 is a schematic diagram of the thread-on state of a thread-hooking floating rotary hook of the present application;

[0017] Figure 8 is a schematic diagram of the first sewing point of a thread-hooking floating rotary hook of the present application.

[0018] Reference Signs: Sewing machine head 1, sewing needle 2, thread-hooking point 21, rotary hook seat 3, anti-slip front baffle 31, anti-slip rear baffle 32, positioning groove 33, inner arc surface 34, needle hook holder 5, needle hook 51, thread frame 6, floating bobbin 7, positioning convex block 71, needle hole 711, thread-dividing convex platform 72, thread-sliding inclined surface 73, thread-sliding flat surface 74, upper thread 1a, reference point 1b, thread-off position 1c, bobbin thread 1d. Detailed Description of the Embodiment

[0019] 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 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.

[0020] In combination with Figure 1 Figure 2 Figure 3 and Figure 4 , a thread-hooking floating rotary shuttle of the present application has a power input source (not shown in the figure), a rotary shuttle fixed seat 3, a floating bobbin core 7, a sewing needle 2, a bobbin thread 1d, and a thread-hooking needle 51. The above rotary shuttle fixed seat 3 is a fixed type, that is, the rotary shuttle fixed seat 3 of the present application is fixed on the sewing equipment, and the rotary shuttle fixed seat 3 is stationary during the sewing process. In this embodiment, the rotary shuttle fixed seat 3 is indirectly or directly fixed on the base plate (base) of the sewing machine head 1. The rotary shuttle fixed seat 3 of the present application is completely different from the rotary shuttle in the prior art in terms of the operation mode. It does not rely on the power input source to drive the rotary shuttle to operate for sewing work. The rotary shuttle fixed seat 3 of the present application is in a static state, and both the rotary shuttle fixed seat 3 and the floating bobbin core 7 are static during sewing, and there is no need to install a mechanical device for accelerating the rotary shuttle fixed seat 3.

[0021] The above thread-hooking needle 51 is connected to the power input source. In this embodiment, a split type is adopted. The above thread-hooking needle 51 is connected to the thread-hooking needle holder 5 ( Figure 1 in the figure). The thread-hooking needle holder 5 and the power input source are set as an integral body. The power input source is connected to the thread-hooking needle 51 through the thread-hooking needle holder 5, and can be fixed by screw means. Or, as another embodiment, the thread-hooking needle 51 and the thread-hooking needle holder 5 can also be an integral body. The above thread-hooking needle 51 receives the power of the power input source to operate. The power input source is arranged at the front or rear of the rotary shuttle fixed seat 3. Whether the power input source is arranged at the front or rear of the rotary shuttle fixed seat 3 can play the same role. The direction of the power input source can be set according to the performance requirements of different sewing equipment. The fixing method of the rotary shuttle fixed seat 3 is flexible. No matter in what direction the power input source is arranged, it is within the protection scope of the present application. The power input source of the present application is preferably a shaft rotation power source.

[0022] The above-mentioned rotary hook fixing base 3 has an anti-slip front baffle 31 and an anti-slip rear baffle 32. When the anti-slip front baffle 31 and the anti-slip rear baffle 32 are installed on the rotary hook fixing base 3, they can be present or absent according to the usage of the thread stand 6. In this embodiment, the example of having the anti-slip front baffle 31 and the anti-slip rear baffle 32 is used for illustration. Specifically: The front part of the rotary hook fixing base 3 is provided with the anti-slip front baffle 31, and the rear part of the rotary hook fixing base 3 is provided with the anti-slip rear baffle 32. The above-mentioned anti-slip front baffle 31 is arranged on the rotary hook fixing base 3 in the form of a cover plate, and the anti-slip front baffle 31 abuts against the floating bobbin 7 during sewing for positioning the two. Here, the connection method between the above-mentioned rotary hook fixing base 3 and the anti-slip front baffle 31 is a spring hinge type. The spring hinge is provided with 180-degree and 90-degree fixed points. It can also be that the connection method between the anti-slip front baffle 31 and the rotary hook fixing base 3 is a positioning connection, and it can be switched on by pushing it to the side with hand. The above-mentioned anti-slip rear baffle 32 abuts against the floating bobbin 7 during sewing for positioning the two. The connection method between the anti-slip rear baffle 32 and the rotary hook fixing base 3 can adopt a spring hinge type or a positioning connection.

[0023] The inner cavity of the above-mentioned rotary hook fixing base 3 is placed with a floating bobbin 7. The bobbin thread 1d is led out from the floating bobbin 7. The floating bobbin 7 is placed in the inner cavity of the rotary hook fixing base 3. The floating bobbin 7 has a wire-sliding inclined surface 73. The wire-sliding inclined surface 73 of the floating bobbin 7 is installed in the inner cavity of the rotary hook fixing base 3. The floating bobbin 7 also has an inner cavity for accommodating the thread stand 6. The floating bobbin 7 has a wire-splitting 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-splitting boss 72. The wire-sliding inclined surface 73 of the above-mentioned floating bobbin 7 faces the inner arc surface 34 of the rotary hook fixing base 3. There is a wire-sliding gap between the inner arc surface 34 and the wire-sliding inclined surface 73. There is a wire-sliding gap between the wire-sliding flat surface 74 and the anti-slip baffle 31. The function of the wire-splitting boss 72 is to split the wire. It enables the sewing upper thread 1a to slide over from the wire-sliding inclined surface 73 and then from the wire-sliding flat surface 74 under the drive of the hook 51. The hook 51 rotates with the input of power on the outer circumference of the wire-splitting 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 upper thread to bypass the floating bobbin 7 from the wire-splitting boss 72. Here, it is particularly pointed out that the needle hole 711 of this application is not limited to being arranged on the positioning convex block 71; that is, the floating bobbin 7 has a needle hole 711. The floating bobbin 7 and the rotary hook fixing base 3 freely slide the wire and lead out the thread stand 6. There is a wire-sliding gap and a positioning setting between the above-mentioned floating bobbin 7 and the rotary hook fixing base 3. The rotary hook fixing base 3 also has a positioning groove 33. When the floating bobbin 7 is placed in the inner cavity of the rotary hook fixing base 3, the positioning convex block 71 of the floating bobbin 7 abuts against the inside of the positioning groove 33 of the rotary hook fixing base 3 to play a positioning role.

[0024] The sewing needle 2 works within the needle hole 711 on the positioning bump 71. However, the needle hole 711 in this application is limited to being provided on the positioning bump 71. It can achieve the same technical effect when provided at other positions of the floating bobbin 7, and the floating bobbin 7 has a needle hole 711. The above-mentioned floating bobbin 7 is configured from the front direction of the rotary hook fixing base 3 into the inner cavity of the rotary hook fixing base 3. After the floating bobbin 7 is configured, the anti-slip front baffle 31 is covered and abuts against the front part of the floating bobbin 7. The floating bobbin 7 and the thread holder 6 placed in the inner cavity of the above-mentioned rotary hook fixing base 3 form a solution for the thread-hooking floating rotary hook of this application to achieve non-contact friction sewing.

[0025] During sewing, the anti-slip front baffle 31 is in a closed state and abuts against the thread-dividing boss 72 of the floating bobbin 7. When the sewing thread of the bobbin thread 1d is used up, the anti-slip rear baffle 32 is pushed open to take out the thread holder 6; when loading the thread holder 6, the thread holder 6 is pushed into the inner cavity of the floating bobbin 7, the bobbin thread 1d is led out, and then the anti-slip rear baffle 32 is covered to start sewing work.

[0026] The barbed needle 51 of this application is provided on one side close to the anti-slip front baffle 31. The barbed needle 51 is used to hook the upper thread 1a on the thread-hooking part 21 of the sewing needle 2. The barbed needle 51 is connected to a power input source. The power input source performs reciprocating operation or circular operation within a certain rotation angle, so that the barbed needle 51 generates a corresponding movement trajectory to drive the barbed needle 51 to operate for the purpose of thread-hooking sewing. Driven by the power input source, the barbed needle 51 sews and hooks the upper thread 1a of the sewing needle 2 (in Figure 5 Figure 6 Figure 7 and Figure 8 ). The pulling force of the barbed needle 51 on the upper thread 1a drives the thread holder 6 in the floating bobbin 7 to output the thread source. The barbed needle 51 works in non-contact cooperation with the rotary hook fixing base 3 and the floating bobbin 7. In this embodiment, if the power input source is provided at the front part of the rotary hook fixing base 3, the power input source reciprocates within a certain rotation angle / or rotates circularly to drive the barbed needle 51 to operate; if the power input source is provided at the rear part of the rotary hook fixing base 3, the power input source reciprocates within a certain rotation angle to drive the barbed needle 51 to operate, so that a thread-hooking floating rotary hook of this application can set the power input source according to different models of sewing machines, which has high flexibility. Since the power input source adopts reciprocating operation within the rotation angle and coordinates with the sewing needle 2 for control, it overcomes the defect of mechanical wear caused by the high-speed operation of the rotary hook in the prior art.

[0027] In Figure 5 Figure 6 Figure 7 and Figure 8In the present application, for a thread-hooking floating rotary shuttle, when the sewing needle 2 passes through the fabric with the upper thread 1a and reaches the needle hole 711 of the floating bobbin 7, the power input source drives the thread-hooking needle 51 at the thread-hooking position 21 to hook the upper thread 1a. 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 51 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 up the thread, tightens the upper thread 1a wound around the floating bobbin 7, and sleights the lower thread 1d to complete sewing.

[0028] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. 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 similarly included in the patent protection scope of the present application.

Claims

1. A thread-hooking floating rotating shuttle, comprising a bobbin thread (1d), a thread-hooking needle (51) and a power input source, characterized in that, It has a rotating hook fixed seat (3) and a floating bobbin (7). The bobbin thread (1d) is led out from the floating bobbin (7). The floating bobbin (7) is placed in the inner cavity of the rotating hook fixed seat (3). The rotating hook fixed seat (3) is a fixed type and remains stationary during the sewing process. The floating bobbin (7) has a positioning bump (71), a thread separating boss (72), a thread sliding inclined surface (73) and a thread sliding flat surface (74). The rotating hook fixed seat (3) has a positioning groove (33) and an inner arc surface (34). The power input source is connected to the latch needle (51), and the latch needle (51) rotates with the power input source on the outer circumference of the thread separating boss (72). There is a thread sliding gap and a positioning arrangement between the floating bobbin (7) and the rotating hook fixed seat (3). An anti-slip front baffle (31) is provided at the front part of the rotating hook fixed seat (3), and an anti-slip rear baffle (32) is provided at the rear part of the rotating hook fixed seat (3). There is a thread sliding gap between the inner arc surface (34) and the thread sliding inclined surface (73), and there is a thread sliding gap between the thread sliding flat surface (74) and the anti-slip front baffle (31). The positioning arrangement is that the positioning bump (71) abuts against the positioning groove (33).

2. A thread hooking floating rotating hook according to claim 1, wherein the floating bobbin (7) has an inner cavity for accommodating a thread holder (6), and the bobbin thread (1d) is wound inside the thread holder (6).

3. A thread-hooking suspended rotating shuttle according to claim 1, characterized in that, The power input source is fixedly connected to a latch needle holder (5) and is connected to the latch needle (51). There is also a sewing needle (2), and the sewing needle (2) works in a needle hole (711) on the positioning bump (71).

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

5. A thread-hooking floating rotating shuttle according to claim 1, characterized in that, The anti-slip front baffle (31) abuts against the front part of the floating bobbin (7), and the anti-slip rear baffle (32) abuts against the rear part of the floating bobbin (7).

6. A thread-hooking suspended rotating shuttle according to claim 1, characterized in that, The latch needle (51) works in a non-contact fit with the rotating hook fixed seat (3) and the floating bobbin (7).

7. A thread-hooking suspended rotating shuttle according to claim 1, characterized in that, If the power input source is arranged at the front part of the rotating hook fixed seat (3), the power input source reciprocates or rotates circumferentially within a certain rotation angle to drive the latch needle (51) to rotate, and the power input source is a shaft rotation power source.

8. A thread-hooking floating rotary shuttle according to claim 1, characterized in that, If the power input source is arranged at the rear part of the rotating hook fixed seat (3), the power input source reciprocates within a certain rotation angle to drive the latch needle (51) to rotate, and the power input source is a shaft rotation power source.

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