A kind of hook thread suspension hook

Abstract

The present application proposes a thread-hooking suspended rotary shuttle, which specifically relates to the technical field of sewing machine manufacturing. It includes a rotary shuttle fixing seat and a suspended bobbin, and there is a free sliding thread gap between the suspended bobbin and the rotary shuttle fixing seat. Preferably, it also includes an anti-slip baffle, the suspended bobbin has a sliding thread slope and a sliding thread plane, the rotary shuttle fixing seat has an inner arc surface and a sliding thread gap relative to the sliding thread slope, and the sliding thread plane and the anti-slip baffle have a sliding thread gap relative to the anti-slip baffle. The thread-hooking suspended rotary shuttle of the present application has the advantages of no need for lubricating oil, no contact, no wear, and a long service life, and does not need to match a complex speed change gear set, thereby improving the overall performance of the sewing machine and reducing the cost of the sewing machine. The thread-hooking suspended rotary shuttle of the present application has the advantage of subverting 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-mentioned technical deficiencies of the rotary hooks of existing sewing equipment, the present application breaks the conventional sewing machine design concept and launches and produces a non-contact, friction-free, oil-free thread-hooking suspended rotary hook, which is easy to use and has a long service life. The characteristic of the present invention is that it includes a rotary hook fixing seat and a suspended bobbin core, and a free sliding gap is provided between the suspended bobbin core and the rotary hook fixing seat.

[0004] Preferably, it also includes an anti-slip baffle, the suspended shuttle core has a sliding line slope and a sliding line plane, the inner arc surface of the rotary hook fixing seat has a sliding line gap relative to the sliding line slope, and the sliding line plane has a sliding line gap relative to the anti-slip baffle.

[0005] Preferably, the positioning protrusion of the suspension bobbin is arranged on a side close to the rotary hook fixing seat, and the rotary hook fixing seat also has a positioning groove, and the positioning protrusion of the suspension bobbin is positioned in the positioning groove of the rotary hook fixing seat.

[0006] Preferably, the front protrusion of the suspension bobbin is arranged at the front end of the line dividing boss, and the front protrusion is provided with a lower line lead-out groove.

[0007] Preferably, the sliding line inclined surface and the sliding line plane are located on both sides of the line dividing boss.

[0008] Preferably, the sliding line slope of the suspended shuttle core faces the inner arc surface of the rotary shuttle fixing seat.

[0009] Preferably, a wire pressing plate is fixed on the wire sliding plane, and the wire pressing plate is fixed on the wire pressing plate with screws.

[0010] Compared with the prior art, the beneficial effects of the present application are as follows: the suspended shuttle core and its thread rack of the present application are arranged in the inner cavity of a fixed rotary hook fixing seat, and the motor drives the hook needle to hook the upper thread of the machine needle, and drives the thread rack to output the thread in a contactless and frictionless process, so that the thread-hooking suspended rotary hook of the present application does not need to be operated at high speed like the prior art to realize sewing work, and realizes the static operation of the thread-hooking suspended rotary hook of the present application, and also makes the sewing equipment using the thread-hooking suspended rotary hook of the present application have better mechanical transmission efficiency. The thread-hooking suspended rotary hook of the present application has the advantages of no need for lubricating oil, no contact, no wear, and high lifespan, and does not need to match a complex speed change gear set, which improves the overall performance of the sewing machine and reduces the cost of the sewing machine. The thread-hooking suspended rotary hook of the present application has subverted the traditional sewing machine design and manufacturing thinking, and has a high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0012] Figure 2 This is a side view of a thread-hooking suspended hook of the present application;

[0013] 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;

[0014] Figure 4 This application is a hook thread suspension hook Figure 2 A magnified image of

[0015] Figure 5 This is a schematic diagram of the initial thread-hooking state of a thread-hooking suspended rotary hook of the present application;

[0016] Figure 6 This is a schematic diagram of the off-line state of a hook-thread suspension hook of the present application;

[0017] Figure 7 This is a schematic diagram of the first suture point of a hook-thread suspension rotary hook of the present application;

[0018] Figure 8 This is a schematic diagram of a vertically arranged hook fixing seat of a hook-thread suspension hook of the present application;

[0019] Fig. 9 This is a hook-thread suspension hook Figure 8 A partial enlarged view of

[0020] Fig.10 This is an exploded view of a thread hook suspension hook fixing seat and a suspension bobbin of the present application;

[0021] Fig.11 It is an exploded view of a suspended bobbin core of a thread-hooking suspended rotary hook of the present application.

[0022] Figure numerals: sewing machine head 1, needle 2, thread hook 21, hook fixing seat 3, anti-slip baffle 31, positioning groove 32, inner arc surface 33, hook needle 5, thread rack 6, suspended shuttle core 7, positioning protrusion 71, needle positioning hole groove 711, line dividing boss 72, sliding line inclined surface 73, sliding line plane 74, front protrusion 75, lower line lead-out groove 76, needle plate 8, needle plate hole 81, motor 91, hollow main shaft 911, positioning connecting rod 92, bearing 93, upper line 1a, lower line 1d, off-line position 1c. DETAILED DESCRIPTION

[0023] 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 methods are only used to illustrate the present invention, and are not intended to limit the present invention. Embodiment 1

[0024] Combination Figure 1 Figure 2 Figure 3 and Figure 4 The present application discloses a thread-hooking suspension hook, which comprises a motor 91, a hook fixing seat 3, a suspension bobbin 7, a needle 2, a positioning connecting rod 92, a thread stand 6 and a hook needle 5. The hook fixing seat 3 of the present application is fixed, that is, the hook fixing seat 3 is connected to the positioning connecting rod 92, and the hook fixing seat 3 and the positioning connecting rod 92 are stationary during the sewing process, and the positioning connecting rod 92 is indirectly or directly fixed to the base plate (or base) of the sewing machine head 1, and the needle 2 has a thread-hooking part 21 for the hook needle 5 to hook the thread.

[0025] The motor 91 has a hollow main shaft 911, which is the motor 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 motor 91 is dynamically connected to the positioning connecting rod 92. The motor 91 is fixed on the sewing machine head 1, and the hollow main shaft 911 of the motor 91 is connected to drive the hook needle 5 to operate. The positioning connecting rod 92 is coaxially arranged with the thread rack 6.

[0026] The hook needle 5 is directly connected to the motor 91 , or, as another embodiment, a connector is provided between the hook needle 5 and the motor 91 , so that the motor 91 drives the hook needle 5 to operate.

[0027] The motor 91 arranged at the bottom of the rotary hook fixing seat 3 drives the hook needle 5 to perform circular motion with the positioning connecting rod 92 as the central axis. The installation position and angle of the rotary hook fixing seat 3 can be adjusted according to the requirements of different sewing equipment.

[0028] The above-mentioned rotary hook fixing seat 3 has an anti-slip baffle 31. The above-mentioned rotary hook fixing seat 3 has an anti-slip baffle 31. When the above-mentioned anti-slip baffle 31 is installed on the rotary hook fixing seat 3, it may be necessary 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 installed on the side or end of the rotary hook fixing seat 3. The above-mentioned anti-slip baffle 31 is arranged and fixed on the rotary hook fixing seat 3 in the form of a cover plate. The anti-slip baffle 31 abuts against the suspended bobbin core 7 and / or the thread rack 6 during the sewing process, and plays a role in lateral positioning of the above-mentioned suspended bobbin core 7 and the thread rack 6. Here, the connection mode between the rotary hook fixing seat 3 and the anti-slip baffle 31 of the present application is a spring hinge type, and it can also be set as a positioning connection. The anti-slip baffle 31 can be opened or closed by pushing it to the side by hand. In addition, the above-mentioned anti-slip baffle 31 is arranged outside the range where the motor 91 drives the hook needle 5 to operate.

[0029] The rotary hook fixing seat 3 has an inner cavity that can accommodate the suspended bobbin 7, and the suspended bobbin 7 has an inner cavity that can accommodate the thread rack 6. Specifically, the thread rack 6 is placed in the inner cavity of the suspended bobbin 7, and the suspended bobbin 7 and the thread rack 6 are placed in the inner cavity of the rotary hook fixing seat 3. In fact, the suspended bobbin 7 is placed together with the thread rack 6. When taking out, the suspended bobbin 7 and the thread rack 6 are taken out from the inner cavity of the rotary hook fixing seat 3. There is a positioning setting and a sliding thread gap between the suspended bobbin 7 and the rotary hook fixing seat 3, and the rotary hook fixing seat 3 also has a lower thread lead-out hole.

[0030] The above positioning arrangement is specifically: the above suspension bobbin 7 also has a positioning protrusion 71 ( Figure 3 ), the positioning protrusion 71 is arranged on the side close to the hook fixing seat 3; the hook fixing seat 3 also has a positioning groove 32, and the positioning groove 32 is arranged to match the positioning protrusion 71. When the suspension bobbin 7 is placed in the inner cavity of the hook fixing seat 3, the positioning protrusion 71 of the suspension bobbin 7 is positioned in the positioning groove 32 of the hook fixing seat 3, and the positioning protrusion 71 plays a role in positioning the suspension bobbin 7 in the hook fixing seat 3, ensuring the placement position of the suspension bobbin 7 and also ensuring the free sliding line gap between the suspension bobbin 7 and the hook fixing seat 3.

[0031] The above-mentioned sliding line gap means that the suspended bobbin core 7 has a line dividing boss 72, a front convex block 75, a sliding line inclined surface 73 and a sliding line 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 line-sliding gap relative to each other, and the line-sliding plane 74 and the anti-slip baffle 31 have a line-sliding gap relative to each other. The line-dividing boss 72 serves to divide the line, so that the sewing thread slides through the line-sliding slope 73 and the line-sliding plane 74 under the drive of the hook needle 5. The hook needle 5 runs with the motor 91 on the outer side of the circumference of the line-dividing boss 72 of the suspension shuttle core 7. Fig.10 Fig.11 In the embodiment, the front end of the line dividing boss 72 is provided with a front protrusion 75, the front protrusion 75 has a needle positioning hole groove 711, and the front protrusion 75 is provided with a lower line lead-out groove 76. Since there is a sliding line gap between the above-mentioned suspended shuttle core 7 and the rotary hook fixing seat 3, it is convenient for the sewing thread to bypass the sliding line from the line dividing boss 72. A thread pressing plate 90 is fixed on the sliding line plane 74.

[0032] The hook needle 5 is rotated with the motor 91 on the outer side of the circumference of the dividing boss 72 of the suspended bobbin 7 and is located on the tangent plane of the hooking point 21. The needle 2 is parallel to the thread rack 6, and the hook needle 5 is located on the tangent plane of the hooking point 21. This embodiment is explained as the needle 2 is parallel to the thread rack 6 (parallel to the side of the thread rack 6).

[0033] The hook needle 5 and the suspended bobbin 7 and the suspended bobbin 7 cooperate with each other in non-contact hooking and line dividing. First, place the thread rack 6 into the inner cavity of the suspended bobbin 7, then place the suspended bobbin 7 together with the thread rack 6 into the rotary hook fixing seat 3, press the positioning protrusion 71 on the positioning groove 32, cover the anti-slip baffle 31, the anti-slip baffle 31 abuts against the front of the suspended bobbin 7 and / or the thread rack 6, and at the same time, make the anti-slip baffle 31 abut against the sliding line plane 74 of the suspended bobbin 7; the sliding line inclined surface 73 on the line dividing boss 72 is opposite to the rotary hook fixing seat 3, so that the sewing thread slides through the sliding line plane 74 and the sliding line inclined surface 73 on both sides of the line dividing boss 72, forming a free sliding line gap, and realizing the technical effect of non-contact hooking and line dividing of the sewing thread on a hooking suspended rotary hook of the present application. The hook fixing seat 3 of the present application is different from the hook of the prior art in the operation mode. The hook fixing seat 3 of the present application is static during sewing, and the sewing thread is hooked without contact and wear.

[0034] At the end of sewing, the anti-slip baffle 31 is still in the closed state, that is, the anti-slip baffle 31 is still opposite to the sliding line plane 74 of the suspension bobbin 7. When the thread rack 6 is used up, the anti-slip baffle 31 is pushed open, and the thread rack 6 can be taken out of the suspension bobbin 7; when the thread rack 6 is to be loaded, the thread rack 6 is placed in the inner cavity of the suspension bobbin 7 and the lower thread 1d is guided, and the anti-slip baffle 31 is covered to start sewing; when the suspension bobbin 7 is to be taken out, the anti-slip baffle 31 is pushed open, and the suspension bobbin 7 is taken out from the inner cavity of the rotary hook fixing seat 3 together with the thread rack 6.

[0035] In conjunction with the accompanying drawings, the hook needle 5 of the present application is arranged on the outside of the rotary hook fixing seat 3, and the needle positioning hole groove 711 of the front protrusion 75 is used for the front end of the machine needle 2 to operate. The hook needle 5 is driven by the motor 91 to hook the upper thread 1a at the thread hooking point 21 of the outer machine needle 2. The hook needle 5 is connected to the motor 91, and the hook needle 5 generates a corresponding thread hooking motion trajectory driven by the motor 91, and coordinates with the machine needle 2 to achieve the purpose of sewing the thread hooking. The upper thread 1a of the machine needle 2 is sewn and hooked, and 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. Under the operation of the motor 91, the hook needle 5 and the machine needle 2 coordinate with each other, so that the lower speed required by the thread rack 6 during the sewing process can achieve sewing thread output, and the rotary hook fixing seat 3 and the suspended bobbin 7 are in a static state, which overcomes the requirement for high-speed operation of the rotary hook in the existing sewing machine technology.

[0036] exist Figure 5 Figure 6 and Figure 7 In the present application, a thread-hooking suspension shuttle first leads the lower thread 1d to the lower thread lead-out groove 76. When the needle 2 carries the upper thread 1a through the fabric and reaches the needle positioning hole groove 711 of the suspension shuttle core 7, the motor 91 drives the hook needle 5 to hook the upper thread 1a at the hooking position 21. 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 core 7. The hook needle 5 continues to rotate to more than 180 degrees to reach the thread-off position 1c and start to off-thread. 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 core 7 and covers the lower thread 1d to complete sewing. Embodiment 2

[0037] exist Figure 8 and Fig. 9In the embodiment 2, the present embodiment 2 is basically the same as the embodiment 1, except that the needle 2 of the embodiment 2 is perpendicular to the thread frame 6 and also has a needle plate 8. The front end of the needle 2 operates in the needle plate hole 81 on the needle plate 8. The needle 2 is perpendicular to the needle plate 8. The needle plate 8 is above the hook needle 5 and the suspended bobbin 7. The hook needle 5 is on the tangent plane of the hooking point 21. The needle 2 carries the upper thread 1a through the needle plate 8 and enters the initial hooking state. The needle tip of the needle 2 runs in the needle plate 8. The needle 2 works under the needle plate 8 outside the suspended bobbin 7. The hook needle 5, the suspended bobbin 7 and the rotary hook fixing seat 3 work in a contactless hooking and dividing manner. The hook needle 5 runs with the motor 91 outside the circumference of the dividing boss 72 of the suspended bobbin 7. The direction of the hook needle 5 is different from that of the embodiment 1, and the hooking process is the same. The above scheme has the same technical effect as the embodiment 1 and should also belong to the protection scope of this application.

[0038] 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 hook suspension hook, characterized in that: The invention comprises a positioning connecting rod (92), a motor (91), a thread rack (6), a needle (2), a rotary hook fixing seat (3) and a suspended bobbin (7); a free thread sliding gap is provided between the suspended bobbin (7) and the rotary hook fixing seat (3); the rotary hook fixing seat (3) comprises a positioning groove (32) and an inner arc surface (33); the suspended bobbin (7) comprises a positioning protrusion (71), a line dividing boss (72), a line sliding inclined surface (73), a front protrusion (75), a line sliding plane (74) and a lower line lead-out groove (76); an anti-slip baffle (31) is installed on the side of the rotary hook fixing seat (3); a line sliding gap is provided between the inner arc surface (33) and the line sliding inclined surface (73); a line sliding gap is provided between the line sliding plane (74) and the anti-slip baffle (31); the positioning protrusion (71) is arranged on a side close to the rotary hook fixing seat (3); The positioning protrusion (71) is positioned in the positioning groove (32), the front protrusion (75) is arranged at the front end of the line dividing boss (72), and the front protrusion (75) is provided with a lower line lead-out groove (76); the rotary hook fixing seat (3) is connected to the positioning connecting rod (92), and a motor (91) is arranged at the bottom direction of the rotary hook fixing seat (3), the motor (91) has a hollow main shaft (911), the hollow main shaft (911) is the motor output shaft, the positioning connecting rod (92) passes through the hollow main shaft (911), a bearing (93) is arranged between the hollow main shaft (911) and the positioning connecting rod (92), the hollow main shaft (911) is connected to the hook needle (5), the motor (91) drives the hook needle (5) to rotate in a circle with the positioning connecting rod (92) as the central axis, the motor (91) is fixed on the sewing machine head (1), and the machine needle (2) is parallel or perpendicular to the thread rack (6).

2. The thread-hooking suspended hook according to claim 1, characterized in that: The sliding line inclined surface (73) and the sliding line plane (74) are located on both sides of the line dividing boss (72).

3. The thread-hooking suspended hook according to claim 1, characterized in that: The sliding line inclined surface (73) faces the inner arc surface (33).

4. The thread-hooking suspended hook according to claim 1, characterized in that: A wire pressing plate (90) is fixed to the wire sliding plane (74), and the wire pressing plate (90) is fixed to the wire sliding plane (74) by screws.

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