A floating rotary shuttle and a sewing machine

Abstract

The present application provides a floating rotary hook and a sewing machine, specifically relating to the technical field of sewing machines, having a thread stand and a latch needle. It is characterized in that the thread stand is placed in the inner cavity of the floating rotary hook. The rear part of the floating rotary hook is adjacent to a fixed rod. The rear part of the floating rotary hook has a positioning cavity matching the fixed rod. The front part of the floating rotary hook has an anti-slip baffle that forms a wire sliding gap by matching the fixed rod with the positioning cavity. The latch needle is connected to the hollow main shaft of the power source provided by the present application. The natural wire outlet of the thread stand and the static operation of the floating rotary hook of the present application can effectively replace the complex mechanical transmission mechanism of the original sewing machine. The floating rotary hook of the present application has the advantage of not requiring lubricant addition, effectively solving the problem of pollution caused by lubricant to the sewing thread and fabric.

Description

Technical Field

[0001] The present application proposes a suspended rotary shuttle and a sewing machine. The suspended rotary shuttle of the present solution is applied to various sewing machines 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 machines. 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. 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 lubricants need to be added to the rotary shuttle body and the high-speed rotary shuttle shaft. In addition, the high-speed rotary shuttle is supported by the mechanical transmission system of the sewing machine, and needs to match the shaft and the speed change gear set, which increases the cost of the sewing machine. The need to add lubricants to the rotary shuttle and its rotary shuttle shaft can easily cause contamination of the sewing thread and fabric; the high-speed operation of the rotary shuttle during sewing restricts the development of intelligent automation, oil-free, and lightweight sewing machines. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies of the rotary hook of the existing sewing equipment, the present application breaks the conventional sewing machine design concept, launches and produces a non-contact, frictionless, and lubrication-free suspended rotary hook, which is easy to use and has a long service life. A suspended rotary hook and a sewing machine have a thread rack and a hook needle, characterized in that the thread rack is placed in the inner cavity of the suspended rotary hook, the rear of the suspended rotary hook is adjacent to the fixed rod, the rear of the suspended rotary hook has a positioning cavity matching the fixed rod, the front of the suspended rotary hook has an anti-slip baffle that matches the fixed rod with the positioning cavity to form a sliding line gap, and the hook needle is connected to the hollow main shaft of the power source of the present application. Through the above-mentioned anti-slip baffle at the front of the suspended rotary hook and the fixed rod at the rear of the suspended rotary hook, the sewing thread can smoothly slide the upper thread from both sides of the suspended rotary hook when the hook needle is running, so that the upper thread and the lower thread form a knot.

[0004] Furthermore, the positioning cavity matches the positioning head of the fixing rod, the positioning groove of the positioning cavity matches the positioning protrusion of the fixing rod, the baffle fixing seat is fixed on the fixing rod, and the anti-slip baffle abuts against the suspended rotary hook / or the thread rack adjacent to the anti-slip baffle. The baffle fixing seat can be flexibly fixed, and when in use, the anti-slip baffle can be twisted or pulled to abut against the suspended rotary hook / or the thread rack, thereby preventing the thread rack or the suspended rotary hook from sliding out.

[0005] Further, the anti-slip-out baffle is used to abut against the floating rotary shuttle or the wire holder or the fixed rod. The bump on the anti-slip-out baffle abuts against the wire holder shaft of the floating rotary shuttle, making the abutment of the anti-slip-out baffle against the wire holder shaft more effective and the wire-sliding effect more obvious.

[0006] Further, the wire-sliding plane of the floating rotary shuttle is higher than the wire holder placed in the inner cavity of the floating rotary shuttle. The wire-sliding plane on the front side of the wire dividing boss forms a wire-sliding gap adjacent to the anti-slip-out baffle. The rear side of the wire dividing boss has a wire-sliding inclined plane. A baffle fixing seat is fixed on the fixed rod, and the baffle fixing seat is connected to the anti-slip-out baffle. The baffle fixing seat is also provided with a wire dividing baffle, and the wire dividing baffle is opposite to the wire-sliding inclined plane on the rear side of the above-mentioned wire dividing boss. The wire-sliding inclined plane and the wire dividing baffle form a wire-sliding gap. The positioning head and the positioning cavity, and the positioning convex block of the positioning head and the positioning groove of the positioning cavity are adjacent to form a wire-sliding gap. The setting of the wire dividing boss can enable the upper thread for sewing to smoothly slide from the wire dividing boss to the wire-sliding plane and the wire-sliding inclined plane respectively under the traction of the crochet needle, making the wire-sliding smooth and fast.

[0007] Further, the floating rotary shuttle is further provided with a front convex block, and a needle hole and a lower thread leading-out groove are arranged on the front convex block.

[0008] Further, the fixed rod and the hollow main shaft of the power source are concentrically arranged. The fixed rod is arranged inside the hollow main shaft. The fixed rod is coaxially arranged with the wire holder shaft, and the fixed rod is coaxially arranged with the crochet needle driven by the power source to rotate in a circle. The power source drives the crochet needle to rotate on one side of the thread-hooking position of the sewing needle. The power source is sleeved on the fixed rod so that the crochet needle can cooperate with the sewing needle to rotate to realize sewing.

[0009] Further, a bearing is arranged between the fixed rod and the hollow main shaft of the power source. The setting of this bearing is not limited to only using a bearing.

[0010] This application also proposes a sewing machine, which includes the above-mentioned floating rotary shuttle, and the above-mentioned floating rotary shuttle is installed on the sewing machine and used for sewing.

[0011] The wire frame of the present application is arranged inside the floating shuttle. By setting an anti-slip baffle at the front of the floating shuttle and a fixing rod at the rear of the floating shuttle, a positioning and wire-sliding gap for the wire frame and the floating shuttle is formed. Driven by a power source, the hook needle hooks the upper thread of the sewing needle. The upper thread slides over the wire-sliding inclined planes and wire-sliding planes on both sides of the wire-dividing boss of the floating shuttle, smoothly driving the wire frame to release the wire. During this process, the wire frame and the floating shuttle have no contact and no friction, realizing the natural wire release of the wire frame of the present application and the static operation of the floating shuttle, making the sewing machine applying the floating shuttle of the present application have better mechanical transmission efficiency, effectively replacing the complex mechanical transmission mechanism of the original sewing machine, and having high popularization value. In addition, a floating shuttle and a sewing machine of the present application have the advantage of not requiring lubricant addition, effectively solving the problem of pollution caused by lubricant to the sewing thread and fabric. The solution of the present application subverts the design concept of traditional sewing equipment and has high application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of a floating shuttle and a sewing machine of the present application;

[0013] Figure 2 is an exploded view of a floating shuttle and a sewing machine of the present application;

[0014] Figure 3 is a structural diagram of a floating shuttle and a sewing machine of the present application;

[0015] Figure 4 is a structural diagram of the floating shuttle of a floating shuttle and a sewing machine of the present application;

[0016] Figure 5 is a schematic diagram of the baffle fixing seat of a floating shuttle and a sewing machine of the present application;

[0017] Figure 6 is an initial thread-hooking state diagram of a floating shuttle and a sewing machine of the present application;

[0018] Figure 7 is a thread-removing state diagram of a floating shuttle and a sewing machine of the present application;

[0019] Figure 8 is a state diagram of forming a buttonhole stitch of a floating shuttle and a sewing machine of the present application.

[0020] Reference numerals: sewing machine head 1, sewing needle 2, thread-hooking position 21, anti-slip-out baffle 31, bump 32, baffle fixing seat 4, thread-dividing baffle 41, hooking needle 5, thread holder 6, floating rotary hook 7, positioning groove 71, thread-dividing boss 72, thread-sliding inclined plane 73, thread-sliding flat plane 74, front bump 75, lower-thread leading-out groove 76, positioning cavity 77, needle hole 78, inner cavity 79, thread holder shaft 7a, power source 91, hollow main shaft 911, fixing rod 92, positioning head 921, positioning bump 922, bearing 93, upper thread 1a, lower thread 1d, thread-off position 1c. Detailed implementation manners

[0021] The preferred embodiments of the present application will be elaborated 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 the protection scope of the present application more clearly defined. These implementation manners are only used to illustrate the present invention and are not intended to limit the present invention.

[0022] Figure 1 Figure 2 Figure 3 Figure 4 It is a floating rotary hook and a sewing machine of the present application, having a power source 91, a baffle fixing seat 4, a floating rotary hook 7, a sewing needle 2, an anti-slip-out baffle 31, a fixing rod 92, a thread holder 6 and a hooking needle 5.

[0023] There is a positioning setting and a thread-sliding gap between the floating rotary hook 7 and the fixing rod 92. The rear part of the floating rotary hook 7 is adjacent to the fixing rod 92. The above-mentioned floating rotary hook 7 has a positioning cavity 77, and the positioning cavity 77 is provided with a positioning groove 71. The positioning groove 71 is arranged on the side of the floating rotary hook 7 away from the fixing rod 92. The front end of the fixing rod 92 has a positioning head 921, and the positioning head 921 has a positioning bump 922. The positioning bump 922 is arranged on the side of the fixing rod 92 away from the floating rotary hook 7. The positioning cavity 77 of the floating rotary hook 7 is positioned on the positioning head 921 of the fixing rod 92. The front part of the floating rotary hook 7 has an anti-slip-out baffle 31 that forms a thread-sliding gap by matching the fixing rod 92 with the positioning cavity 77, so that the floating rotary hook 7 and the fixing rod 92 form a positioning and a thread-sliding gap under the abutment of the sliding-out baffle 31. During the sewing process, the floating rotary hook 7, the anti-slip-out baffle 31 and the fixing rod 92 are stationary. The sewing needle 2 has a thread-hooking position 21, the hooking needle 5 is connected to the power source 91, and the thread-hooking position 21 is used for the hooking needle 5 to hook the thread under the implementation of the power source 91. The fixing rod 92 and the hooking needle 5 driven by the power source 91 to rotate in a circle are coaxially arranged.

[0024] The baffle fixing seat 4 of the present application is fixed on the above-mentioned fixing rod 92. The baffle fixing seat 4 has a connection end connected to the anti-slip-out baffle 31, and the baffle fixing seat 4 is connected to the anti-slip-out baffle 31. Like the fixing rod 92, the anti-slip-out baffle 31 is in a stationary state when the sewing machine is working, and the anti-slip-out baffle 31 is used to abut against the thread stand 6 and / or the floating shuttle 7. When in use, the anti-slip-out baffle 31 can be twisted or pulled to turn the anti-slip-out baffle 31 onto the thread stand 6 and / or the floating shuttle 7 to implement abutment; when the thread stand 6 needs to be taken out, after twisting or pulling the anti-slip-out baffle 31, the floating shuttle 7 and the thread stand 6 can be taken away together.

[0025] There is a positioning setting and a thread sliding gap between the above-mentioned floating shuttle 7 and the anti-slip-out baffle 31. This embodiment proposes to have the anti-slip-out baffle 31, and the setting of the anti-slip-out baffle 31 does not mean that the abutment solution of the present application is only limited to the anti-slip-out baffle 31 itself. In this embodiment, the anti-slip-out baffle 31 is fixed on the fixing rod 92.

[0026] The above-mentioned anti-slip-out baffle 31 is arranged in the form of a cover plate to abut against the floating shuttle 7 and / or the thread stand 6, so as to achieve the lateral positioning of both the floating shuttle 7 and the thread stand 6. Twisting or pulling the anti-slip-out baffle 31 can realize abutment against or separation from the floating shuttle 7 and / or the thread stand 6.

[0027] The above-mentioned floating shuttle 7 has an inner cavity 79 that can accommodate the thread stand 6 and a thread stand shaft 7a, and the thread stand 6 is placed in the inner cavity 79 of the floating shuttle 7. The above-mentioned anti-slip-out baffle 31 also has a bump 32, and the bump 32 abuts against the thread stand shaft 7a of the floating shuttle 7. The thread stand shaft 7a passes through the thread stand 6, and the above-mentioned fixing rod 92 is coaxially arranged with the thread stand 6 and the thread stand shaft 7a. As another solution, the bump 32 can also be set to be concave, and the achieved technical effect is the same.

[0028] The above-mentioned power source 91 has a hollow main shaft 911. The hollow main shaft 911 is the output shaft of the power source 91. The hollow main shaft 911 of the power source 91 and the fixing rod 92 are concentrically arranged. A movable connection can be set between the two, or the fixing rod 92 can be only arranged inside the hollow main shaft 911, and the power source 91 operates as usual. The fixing rod 92 passes through the hollow main shaft 911. In order to facilitate assembly and precise operation, a bearing 93 is arranged between the hollow main shaft 911 and the fixing rod 92. The power source 91 and the fixing rod 92 are in a movable connection. The power source 91 is fixed on the sewing machine head 1, and the hook needle 5 is connected to the hollow main shaft 911 of the power source 91. The above-mentioned hook needle 5 is directly connected to the power source 91, or, as another implementation manner, a connecting body is arranged between the hook needle 5 and the power source 91, so that the power source 91 drives the hook needle 5 to operate.

[0029] The floating rotary shuttle 7 also has a thread separating boss 72, a front bump 75, a thread sliding inclined surface 73 and a thread sliding flat surface 74. The thread sliding inclined surface 73 and the thread sliding flat surface 74 are located on both sides of the thread separating boss 72. The thread sliding inclined surface 73 of the above floating rotary shuttle 7 faces the power source 91 side, and the thread sliding flat surface 74 faces the anti-slip-out baffle 31 side. The thread sliding flat surface 74 of the floating rotary shuttle 7 is higher than the thread holder 6 placed in the inner cavity 79 of the floating rotary shuttle 7. The baffle fixing seat 4 is also provided with a thread separating baffle 41, and the thread separating baffle 41 is opposite to the thread sliding inclined surface 73. The function of the thread separating boss 72 is to separate the threads, so that the upper thread 1a for sewing slides between the thread sliding inclined surface 73 and the thread separating baffle 41 under the drive of the hook needle 5. The setting of the thread separating baffle 41 makes the upper thread 1a for sewing slide more smoothly, and then slides over the thread sliding flat surface 74. The hook needle 5 rotates continuously with the power source 91 on the outer circumference of the thread separating boss 72 of the floating rotary shuttle 7, and continuously slides the upper thread 1a over the thread separating boss 72( Figure 5 Figure 6 and Figure 7 shows the upper thread 1a). The front bump 75 is arranged at the front end of the thread separating boss 72, and the front bump 75 has a needle hole 78 and a lower thread leading-out groove 76. Since there is a thread sliding gap between the above floating rotary shuttle 7 and the anti-slip-out baffle 31, it is beneficial for the sewing thread to bypass the thread separating boss 72.

[0030] When the floating rotary shuttle 7 is placed on the fixed rod 92, the positioning cavity 77 of the floating rotary shuttle 7 is positioned on the positioning head 921 of the fixed rod 92, the positioning groove 71 is positioned on the positioning bump 922, and the bump 32 of the anti-slip-out baffle 31 abuts against the thread holder shaft 7a, which not only determines the positioning setting of the floating rotary shuttle 7 together with the thread holder 6 between the fixed rod 92 and the bump 32, but also ensures the formation of the thread sliding gap between the floating rotary shuttle 7 and the anti-slip-out baffle 31 and between the floating rotary shuttle 7 and the fixed rod 92.

[0031] The above hook needle 5 rotates continuously with the power source 91 on the outer circumference of the thread separating boss 72 of the floating rotary shuttle 7. The hook needle 5 is on the tangent plane of the thread hooking position 21, and the sewing needle 2 is parallel to the side surface of the thread holder 6.

[0032] The above hook needle 5 and the floating rotary shuttle 7 work in a non-contact thread hooking and thread separating cooperation. When placing the thread holder 6, pull out the lower thread 1d and lead it into the lower thread leading-out groove 76 of the floating rotary shuttle 7, abut the thread holder 6 together with the floating rotary shuttle 7 against the fixed rod 92, and then cover the anti-slip-out baffle 31 to start sewing; when taking out the thread holder 6, open the anti-slip-out baffle 31, and then the floating rotary shuttle 7 together with the thread holder 6 can be taken out. The floating rotary shuttle 7 of the present application is completely different from the rotary shuttle of the prior art in the operation mode. The floating rotary shuttle 7 is static during sewing, and the power source 91 drives the hook needle 5 to perform the sewing thread hooking action without contact and wear.

[0033] Combined with the attached Figure 5Figure 6 and Figure 7 , the crochet hook 5 of the present application is arranged on one side of the thread-hooking position 21 of the sewing needle 2, and the needle hole 78 of the front lug 75 allows the tip of the front end of the sewing needle 2 to rotate. Driven by the power source 91, the crochet hook 5 hooks the upper thread 1a on the thread-hooking position 21 of the sewing needle 2. Driven by the power source 91, the crochet hook 5 drives the upper thread 1a around the thread-dividing boss 72, so that the upper thread 1a slides past between the sliding thread inclined surface 73 and the thread-dividing baffle 41, and slides past between the sliding thread plane 74 and the anti-slip-out baffle 31. When the crochet hook 5 rotates to the thread-off position 1c with the crochet hook head facing upwards, the upper thread 1a is naturally pulled up by the sewing needle 2, and the first knot is formed by the upper thread 1a and the lower thread 1d. Under the continuous operation of the power source 91, the crochet hook 5 continues to generate the above-mentioned thread-hooking motion trajectory. The pulling force of the crochet hook 5 on the upper thread 1a drives the output wire source of the lower thread 1d of the wire frame 6 inside the floating shuttle 7. The crochet hook 5 and the sewing needle 2 coordinate with each other to realize that the sewing thread can be output at a relatively low rotational speed required by the wire frame 6 during the sewing process. At the same time, the floating shuttle 7 is in a static state, overcoming the technical defects in the existing sewing machine technology that the shuttle requires a high rotational speed and lubricant needs to be added.

[0034] The present application also proposes a sewing machine, which includes the above-mentioned floating shuttle 7 and its related components, and the above-mentioned floating shuttle 7 is installed on the sewing machine and used for sewing.

[0035] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A floating rotating shuttle, having a thread stand (6) and a latch needle (5), characterized in that, It has a power source (91), a fixed rod (92), a floating rotary shuttle (7), a baffle fixing seat (4) and an anti-slip-out baffle (31). The thread holder (6) is placed in the inner cavity (79) of the floating rotary shuttle (7). The rear part of the floating rotary shuttle (7) is adjacent to the fixed rod (92). The rear part of the floating rotary shuttle (7) has a positioning cavity (77) that matches the fixed rod (92). The positioning head (921) of the fixed rod (92) matches the positioning cavity (77). The positioning groove (71) of the positioning cavity (77) matches the positioning convex block (922) of the fixed rod (92). The positioning head (921) and the positioning cavity (77), as well as the positioning convex block (922) and the positioning groove (71), are adjacent to form a wire-sliding gap. The floating rotary shuttle (7) has a wire-splitting boss (72), a wire-sliding plane (74) and a wire-sliding inclined plane (73). The wire-sliding inclined plane (73) and the wire-sliding plane (74) are located on both sides of the wire-splitting boss (72). The wire-sliding plane (74) and the anti-slip-out baffle (31) are adjacent to form a wire-sliding gap; The power source (91) has a hollow main shaft (911). The hook needle (5) is connected to the hollow main shaft (911). The fixed rod (92) is inserted inside the hollow main shaft (911). A bearing (93) is provided between the fixed rod (92) and the hollow main shaft (911). A baffle fixing seat (4) is fixed on the fixed rod (92). The baffle fixing seat (4) has a wire-splitting baffle (41), and the wire-splitting baffle (41) faces the wire-sliding inclined plane (73).

2. A floating rotating shuttle according to claim 1, wherein, The floating rotary shuttle (7) has an inner cavity (79), and the wire-sliding plane (74) is higher than the thread holder (6) placed in the inner cavity (79).

3. A floating rotary shuttle according to claim 1, wherein The baffle fixing seat (4) is connected to the anti-slip-out baffle (31). The wire-splitting baffle (41) faces the wire-sliding inclined plane (73) at the rear side of the wire-splitting boss (72). The convex point (32) of the anti-slip-out baffle (31) abuts against the thread holder shaft (7a) of the floating rotary shuttle (7).

4. A floating rotary shuttle according to claim 3, characterized in that, The thread holder shaft (7a) is coaxially arranged with the fixed rod (92), and the fixed rod (92) is coaxially arranged with the hook needle (5) driven by the power source (91) to rotate in a circle.

5. A floating rotary shuttle according to claim 1, characterized in that, The floating rotary shuttle (7) is further provided with a front convex block (75), and a needle hole (78) and a lower-thread leading-out groove (76) are provided on the front convex block (75).

6. A floating rotary shuttle according to claim 1, characterized in that, The fixed rod (92) and the hollow main shaft (911) are concentrically arranged.

7. A floating rotary shuttle according to claim 1, characterized in that, The power source (91) drives the hook needle (5) to rotate to be on one side of the thread-hooking position (21) of the sewing needle (2).

8. A sewing machine, comprising a floating rotary hook (7) according to any one of the above claims 1 to 7, characterized in that, The described floating rotary shuttle (7) is installed on a sewing machine and is used for sewing.

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