A kind of hook thread suspension hook

Abstract

The present application proposes a thread-hooking suspended shuttle, which specifically relates to the technical field of sewing machine manufacturing. The thread rack is placed in the inner cavity of the suspended shuttle core, and the suspended shuttle core together with the thread rack is placed in the inner cavity of the shuttle fixing seat. There is a sliding line gap and positioning setting between the suspended shuttle core and the shuttle fixing seat. The shuttle fixing seat is fixed. When the sewing machine is running, the shuttle fixing seat is stationary, and the power input end is connected to the hook needle. The suspended shuttle core of the present application is configured in the inner cavity of the fixed shuttle fixing seat. The power input end drives the hook needle and the suspended shuttle core of the shuttle fixing seat without contact and friction, so that the thread-hooking suspended shuttle 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 shuttle of the present application, and does not need to match a complex speed change gear set. The thread-hooking suspended shuttle applied for in the present application has subverted the traditional sewing machine design and manufacturing thinking, and has a high promotion value.

Description

Technical Field

[0001] The present application proposes a thread-hooking suspended rotary shuttle. The thread-hooking suspended rotary shuttle of the present solution is applied to various sewing equipment using rotary shuttles, such as household sewing machines, industrial lockstitch machines, heavy-duty sewing machines, embroidery machines, roller machines, etc., and specifically relates to the technical field of sewing machine manufacturing. Background Art

[0002] As a sewing machine for sewing fabrics, the sewing machine has a history of more than 200 years. It has made great contributions to the development of the clothing industry in human society and promoted the development of human civilization. Throughout the history of the development of sewing machine technology, its rotary shuttle still follows the original plan, and the technical principles implemented remain 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 very easy to be damaged during use, and the failure rate is also high, resulting in a relatively short service life. When sewing, the rotary shuttle runs at high speed, and grease needs to be added to the rotary shuttle body and the high-speed running parts of the shaft. In addition, the high-speed rotary shuttle needs to be supported by the mechanical transmission system of the sewing machine, and needs to be matched with a complex speed gear set, which increases the cost of the sewing machine. The rotary shuttle and its shaft need to be lubricated, which 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 sewing equipment. Summary of the invention

[0003] In view of the above technical deficiencies of the rotary hook of the existing sewing equipment, the present application breaks the conventional sewing machine design concept to achieve and produce a non-contact, frictionless, oil-free and thread-hook suspension rotary hook, which is easy to use and has a long service life. The suspension rotary hook comprises a thread stand, a hook needle and a power input source, characterized in that the thread stand is placed in the inner cavity of the suspension shuttle core, the suspension shuttle core and the thread stand are placed in the inner cavity of the rotary hook fixing seat, there is a sliding line gap and a positioning setting between the suspension shuttle core and the rotary hook fixing seat, the rotary hook fixing seat is fixed, the rotary hook fixing seat is stationary when the sewing machine is running, and an anti-slip baffle is set at the front end of the rotary hook fixing seat, the power input source is connected to the hook needle, and the hook needle runs with the power input on the outer side of the line dividing boss circumference of the suspension shuttle core. The rotary hook fixing seat of the present application is different from the existing rotary hook in the operation mode, and does not rely on the power input source to drive the rotary hook to operate to perform sewing work, and the rotary hook fixing seat of the present application does not need to be equipped with a speed change mechanical setting to increase the operating speed.

[0004] Furthermore, the rotary hook fixing seat is indirectly or directly fixed on the base plate of the sewing machine head. The installation method of the rotary hook fixing seat of the present application is flexible to adapt to the use of various sewing machines.

[0005] Furthermore, the suspended shuttle core has a line dividing boss, a sliding line inclined surface and a sliding line plane, the inner arc surface of the rotary shuttle fixing seat has a sliding line gap relative to the sliding line inclined surface, and the sliding line plane has a sliding line gap relative to the anti-slip baffle, and the hook belt passes the upper thread and slides through the suspended shuttle core, so that the line dividing boss plays the role of continuous line dividing.

[0006] Furthermore, the anti-slip baffle abuts against the front end of the suspended bobbin and / or the thread rack, and the sewing thread can smoothly slide between the anti-slip baffle and the suspended bobbin while the anti-slip baffle abuts against the front end.

[0007] Furthermore, there is a positioning arrangement between the suspension bobbin and the rotary hook fixing seat. Specifically, the suspension bobbin also has a positioning protrusion, and the rotary hook fixing seat also has a positioning groove. When the suspension bobbin is placed in the inner cavity of the rotary hook fixing seat, the positioning protrusion of the suspension bobbin abuts against the positioning groove of the rotary hook fixing seat. The positioning arrangement between the suspension bobbin and the rotary hook fixing seat increases the matching relationship between the suspension bobbin and the rotary hook fixing seat, making the suspension bobbin more stable after being placed.

[0008] Preferably, the positioning protrusion has a needle positioning hole groove for the front end of the needle tip of the needle to operate, so that the floating bobbin of the present application has precise sewing positioning.

[0009] Preferably, the hook needle works in a contactless manner with the suspended shuttle core and the rotary shuttle fixing seat.

[0010] Furthermore, the power input source is arranged at the front end of the rotary hook fixing seat, and the power input source drives the hook needle to operate by reciprocating and / or circular rotation within a certain angle; the power input source is arranged at the rear end of the rotary hook fixing seat, and the power input source drives the hook needle to operate by reciprocating and / or circular rotation within a certain angle. The power input source of the present application can set the position of the power input source according to different sewing machines, and has high flexibility and strong applicability.

[0011] Compared with the prior art, the beneficial effects of the present application are as follows: the suspended shuttle core of the present application is arranged in the inner cavity of the fixed rotary hook fixing seat, and the power source drives the hook needle and then drives the bottom line to come out without contact and friction, so that the operation of the thread-hook suspended rotary hook of the present application does not need to be operated at high speed like the prior art to realize the sewing work, and the static operation of the thread-hook suspended rotary hook of the present application is realized, and the sewing equipment using the thread-hook suspended rotary hook of the present application has better mechanical transmission efficiency. The thread-hook 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-hook 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

[0012] Figure 1 This is a structural schematic diagram of a thread-hooking suspended hook of the present application;

[0013] Figure 2 This is a schematic diagram of the interior of a thread-hooking suspended hook of the present application;

[0014] Figure 3 This is an exploded view of a hook fixing seat, a suspended bobbin core and a thread rack of a thread hook suspension hook of the present application;

[0015] Figure 4 This is an enlarged view of a thread hook suspension rotary hook needle holder and a hook needle of the present application;

[0016] Figure 5 This is a schematic diagram of the initial thread-hooking state of a thread-hooking suspended rotary hook of the present application;

[0017] Figure 6 This is a schematic diagram of the off-line state of a hook-thread suspension hook of the present application;

[0018] Figure 7 This is a schematic diagram of the thread-hooking suspended hook thread-on state of the present application;

[0019] Figure 8 This is a rear view of the thread-hooking suspended hook in the present application;

[0020] Fig. 9 This is a schematic diagram of the first suturing point of a hook-thread suspended rotary shuttle of the present application.

[0021] Figure numerals: sewing machine head 1, needle 2, thread hooking point 21, hook fixing seat 3, anti-slip baffle 31, positioning groove 32, hook needle 5, thread rack 6, suspended shuttle core 7, positioning protrusion 71, needle positioning hole groove 711, line dividing boss 72, sliding line slope 73, hook needle rack 8, upper line 1a, reference point 1b, off-line position 1c, lower line 1d. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present application are 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 modes are only used to illustrate the present invention, and are not intended to limit the present invention.

[0023] Combination Figure 1 Figure 2 Figure 3 and Figure 4The present application discloses a hook-thread suspension rotary hook having a power input source (not shown in the figure), a rotary hook fixing seat 3, a suspension bobbin core 7, a thread rack 6, a hook needle rack 8 and a hook needle 5. The above-mentioned rotary hook fixing seat 3 is fixed, that is, the rotary hook fixing seat 3 of the present application is fixed on the sewing equipment, and the rotary hook fixing seat 3 is stationary during the sewing process. In this embodiment, the rotary hook fixing seat 3 is indirectly or directly fixed on the base plate (base) of the sewing machine head 1. The power input source is connected to the hook needle 5, or the above-mentioned hook needle 5 is connected to the hook needle rack 8 ( Figure 4 (in), or, as another embodiment, the hook needle 5 and the hook needle frame 8 can also be integrated; the hook needle frame 8 is connected to the power input source, or the hook needle frame 8 and the power input source are set as one body. In this embodiment, a split type is adopted, and the power input source is connected to the hook needle 5 through the hook needle frame 8, which can be fixed by screw connection. The above-mentioned hook needle 5 receives power from the power input source, and the power input source is set at the front end or rear end of the rotary hook fixing seat 3. Whether the power input source is set at the front end or rear end of the rotary hook fixing seat 3, it can play the same role, and the direction of the power input source can be set according to the performance requirements of different sewing equipment. The specific power input source is set at the front end of the rotary hook fixing seat 3, and the power input source drives the hook needle 5 to operate by reciprocating / or circular operation within a certain angle; the power input source is set at the rear end of the rotary hook fixing seat 3, and the power input source drives the hook needle 5 to operate by reciprocating within a certain angle. In this way, the fixing method of the rotary hook fixing seat 3 flexibly corresponds to the power input source, and whether the power input source is set at the front end or rear end of the rotary hook fixing seat 3 is within the protection scope of this application. The power input source of the present application can accept power devices such as electromagnets, and it is preferred that the power input source is an axial rotation power source.

[0024] The rotary hook fixing seat 3 has an anti-slip baffle 31, and the rotary hook fixing seat 3 has an anti-slip front baffle 31. When the anti-slip front baffle 31 is installed on the rotary hook fixing seat 3, it may be necessary to have it according to the use of the thread rack 6. This embodiment is described by taking the anti-slip front baffle 31 as an example. Specifically, the anti-slip baffle 31 is arranged at the front end of the rotary hook fixing seat 3. The anti-slip baffle 31 is arranged on the rotary hook fixing seat 3 in the form of a cover plate. As the name implies, the anti-slip baffle 31 abuts against the front end of the suspended bobbin 7 and / or the thread rack 6 (the side close to the anti-slip baffle 31 is the front end) during sewing to position the above two. Here, the connection method between the above-mentioned rotary hook fixing seat 3 and the anti-slip baffle 31 of the present application is a spring hinge type, and the spring hinge is provided with 180 degree and 90 degree fixing points. The anti-slip baffle 31 and the rotary hook fixing seat 3 can also be set as a positioning connection, and the anti-slip baffle 31 can be opened and closed by pushing it to the side with hand.

[0025] The inner cavity of the rotary hook fixing seat 3 is provided with a suspension bobbin 7 and a thread rack 6: the thread rack 6 is placed in the inner cavity of the suspension bobbin 7, the suspension bobbin 7 and the thread rack 6 are placed in the inner cavity of the rotary hook fixing seat 3, there is a thread sliding gap and positioning arrangement between the suspension bobbin 7 and the rotary hook fixing seat 3, the suspension bobbin 7 has a thread sliding slope 73, the thread sliding slope 73 of the suspension bobbin 7 is installed in the inner cavity of the rotary hook fixing seat 3, and the suspension bobbin 7 also has an inner cavity for accommodating the thread rack 6. The suspension bobbin 7 has a thread dividing boss 72, a thread sliding slope 73 and a thread sliding plane 74 ( Figure 2 Figure 3 ), the line-sliding slope 73 and the line-sliding plane 74 are located on both sides of the line-dividing boss 72, the line-sliding slope 73 of the above-mentioned suspension shuttle core 7 faces the inner arc surface 33 of the rotary hook fixing seat 3, the inner arc surface 33 and the line-sliding slope 73 have a threading gap relative to each other, the line-sliding plane 74 and the anti-slip baffle 31 have a threading gap relative to each other, and the line-dividing boss 72 functions to slide and divide the line, so that the sewing thread slides from the line-sliding slope 73 and the line-sliding plane 74 under the drive of the hook needle 5, and the hook needle 5 runs with the power input on the outer side of the circumference of the line-dividing boss 72 of the suspension shuttle core 7. Since there is a threading gap between the above-mentioned suspension shuttle core 7 and the rotary hook fixing seat 3, it is convenient for the sewing thread to bypass the suspension shuttle core 7.

[0026] There is a positioning arrangement between the above-mentioned suspension bobbin core 7 and the rotary hook fixing seat 3, specifically: the above-mentioned suspension bobbin core 7 also has a positioning protrusion 71 ( Figure 3 ), the positioning protrusion 71 is provided with a needle positioning hole groove 711 for the operation of the machine needle 2. However, it is particularly pointed out here that the needle positioning hole groove 711 of the present application is not limited to being provided on the positioning protrusion 71. The needle positioning hole groove 711 provided at other positions of the suspended bobbin 7 can achieve the same technical effect; that is, the suspended bobbin 7 has a needle positioning hole groove 711, and there is a free sliding line gap between the suspended bobbin 7 and the rotary hook fixing seat 3. The rotary hook fixing seat 3 also has a positioning groove 32. When the suspended bobbin 7 is placed in the inner cavity of the rotary hook fixing seat 3, the positioning protrusion 71 of the suspended bobbin 7 is located in the positioning groove 32 of the rotary hook fixing seat 3, which plays the role of positioning the suspended bobbin 7 in the rotary hook fixing seat 3, ensuring the placement position of the suspended bobbin 7 and ensuring that the suspended bobbin 7 has a fixed position when the thread rack 6 is threaded.

[0027] The needle 2 works in the needle positioning hole 711 of the suspended shuttle 7. The suspended shuttle 7 is placed in the inner cavity of the shuttle fixing seat 3 from the front end direction of the rotary hook fixing seat 3, and covered with an anti-slip baffle 31. First, the thread rack 6 is placed in the inner cavity of the suspended shuttle 7, and then the suspended shuttle 7 and the thread rack 6 are placed in the inner cavity of the suspended shuttle 7. After placement, the anti-slip baffle 31 is covered so that the anti-slip baffle 31 abuts against the sliding line plane 74 of the suspended shuttle, which plays a role in limiting the thread rack 6. The suspended shuttle 7 and the thread rack 6 placed in the inner cavity of the rotary hook fixing seat 3 realize the non-contact rotation and wear-free sewing of the thread hooking suspended rotary hook of the present application. The rotary hook fixing seat 3 of the present application is different from the rotary hook of the prior art in terms of operation mode. The rotary hook fixing seat 3 of the present application does not rely on the power input source to drive the sewing work, and the rotary hook fixing seat 3 does not need to be equipped with a mechanical speed change to increase the operating speed.

[0028] When sewing is finished, the anti-slip baffle 31 is still in the closed state, that is, the anti-slip baffle 31 abuts against the line dividing boss 72 of the suspension shuttle core 7. When taking out the thread rack 6 that has run out of sewing thread, the suspension shuttle core 7 is taken out from the inner cavity of the rotary hook fixing seat 3 together with the thread rack 6.

[0029] Figure 5 Figure 6 Figure 7 Figure 8 and Fig. 9 Combined with other drawings, the hook needle 5 of the present application is arranged on the side close to the anti-slip baffle 31. The hook needle 5 is driven by the power input source to hook the upper thread on the hooking part 21 of the needle 2. The hook needle 5 is connected to the power input source, and the power input source performs reciprocating or circular operation within a certain angle. If the power input source is arranged at the front end of the rotary hook fixing seat 3, the power input source performs reciprocating or circular operation within a certain angle; if the power input source is arranged at the rear end of the rotary hook fixing seat 3, the power input source performs reciprocating operation at a certain angle, so that the hook needle 5 produces a corresponding motion trajectory, and coordinates with the needle 2 to achieve the purpose of sewing the hook thread. Driven by the power input source, the hook needle 5 sews the upper thread 1a of the needle 2. The pulling force of the hook needle 5 on the upper thread 1a drives the thread rack 6 of the suspended bobbin 7 to output the thread source. The hook needle 5 works with the rotary hook fixing seat 3 and the suspended bobbin 7 without contact. Since the power source uses reciprocating motion within the corner, there is no contact friction between the hook needle 5 and the suspended shuttle core 7 of the rotary hook fixing seat 3, thus overcoming the requirement of the existing sewing machine technology for high-speed rotation of the rotary hook.

[0030] exist Figure 5 Figure 6 Figure 7 Figure 8 and Fig. 9In the present application, when the needle 2 carries the upper thread 1a through the fabric and reaches the needle positioning hole 711 of the suspension shuttle 7, the power input source drives the hook needle 5 to hook the upper thread 1a at the hooking position 21, and the hooked upper thread 1a is divided into the front thread and the rear thread by the line dividing boss 72 of the suspension shuttle 7, and the hook needle 5 continues to rotate to more than 180 degrees to reach the line decoupling position 1c and start to decoupling. At the same time, the needle 2 pulls the upper thread 1a to continue to reel in, tightens the upper thread 1a wrapped around the suspension shuttle 7 and covers the lower thread 1d to complete sewing.

[0031] The above description is only a preferred implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A thread hooking suspension hook, comprising a thread rack (6), a hooking needle (5) and a power input source, characterized in that: The invention comprises a suspended bobbin (7) and a rotary hook fixing seat (3); the thread rack (6) is placed in the inner cavity of the suspended bobbin (7); the suspended bobbin (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 fixed; the power input source is connected to the hook needle (5); a sliding line gap and a positioning device are provided between the suspended bobbin (7) and the rotary hook fixing seat (3); the suspended bobbin (7) has a positioning convex block (71), a line dividing convex platform (72), a sliding line inclined surface (73) and a sliding line plane (74); the rotary hook fixing seat (3) has an inner arc surface (33) and a positioning groove (34); 2), a sliding line gap is provided between the inner arc surface (33) and the sliding line inclined surface (73), an anti-slip baffle (31) is arranged at the front end of the rotary hook fixing seat (3), and a sliding line gap is provided between the sliding line plane (74) and the anti-slip baffle (31); the positioning protrusion (71) abuts against the positioning groove (32) to ensure the placement position of the suspended shuttle core (7); the machine needle (2) has a hooking point (21), the hooking needle (5) rotates with the power input on the outer side of the circumference of the line dividing boss (72), and the hooking needle (5) is driven by the power input source to hook the upper line (1a) on the hooking point (21) to form a coil.

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

3. The thread-hooking suspension hook according to claim 1, characterized in that: The positioning protrusion (71) has a machine needle positioning hole groove (711), and the machine needle positioning hole groove (711) is used for the front end of the needle tip of the machine needle (2) to operate.

4. The thread-hooking suspension hook according to claim 1, characterized in that: It also has a hook needle frame (8), the power input source is connected to the hook needle frame (8) and the hook needle (5), and the hook needle (5) works in a contactless manner with the suspended shuttle core (7) and the rotary shuttle fixing seat (3).

5. The thread-hooking suspension hook according to claim 1, characterized in that: The power input source is arranged at the rear end of the rotary hook fixing seat (3), and the power input source reciprocates within a certain rotation angle.

6. The thread-hooking suspension hook according to claim 1, characterized in that: The rotary hook fixing seat (3) is indirectly or directly fixed on the base plate of the sewing machine head (1).

Images