Thread separating mechanism of sewing machine

Abstract

The utility model discloses a sewing machine branching mechanism which is installed on a sewing machine body, the sewing machine body comprises a machine frame, a platen fixedly connected to the machine frame, a machine head installed on the platen and a driving mechanism driving the machine head to operate, a hand wheel is installed on the machine head, and the sewing machine branching mechanism comprises a rotating shaft installed on the side face of the hand wheel; the mounting frame is fixedly connected to the bedplate; one end of the main wire shaft and one end of the wire separating shaft are horizontally and rotationally connected to the mounting frame, the other ends of the main wire shaft and the wire separating shaft are suspended, and the rotating shaft is in transmission connection with the wire separating shaft; and the wire leading assembly is mounted on the mounting frame, is positioned between the main wire shaft and the wire separating shaft, and is in transmission connection with the rotating shaft. According to the thread dividing device, a user can conveniently divide a thread into two bobbins, operation is easy, the thread dividing efficiency is improved, and winding of the sewing thread can be uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a thread dividing mechanism for a sewing machine. Background Art

[0002] When sewing, if a certain thread is insufficient, one bobbin of thread may be divided equally or divided into two bobbins according to the required proportion. However, there is no thread dividing mechanism on the current civilian sewing machines to facilitate thread dividing. When the user needs to divide one bobbin of thread into two bobbins, the thread is usually divided by manually holding the thread end and winding it little by little onto another bobbin, which is troublesome and prone to uneven winding when winding manually. Utility Model Content

[0003] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a sewing machine thread dividing mechanism, which can facilitate the user to divide a roll of thread into two rolls. It is not only simple to operate and improve the thread dividing efficiency, but also can make the winding of the sewing thread more uniform.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A sewing machine thread branching mechanism is installed on a sewing machine body. The sewing machine body includes a frame, a table fixedly connected to the frame, a head installed on the table and a driving mechanism for driving the head to operate. The head is equipped with a hand wheel, including: a rotating shaft installed on the side of the hand wheel; a mounting frame fixedly connected to the table; a main line shaft and a branch line shaft, both of which are horizontally rotatably connected to the mounting frame at one end and suspended at the other end, and the rotating shaft is connected to the branch line shaft in a transmission manner; a lead assembly is installed on the mounting frame, the lead assembly is located between the main line shaft and the branch line shaft, and the lead assembly is connected to the rotating shaft in a transmission manner.

[0006] Preferably, the lead assembly includes a support plate fixedly connected to the mounting frame, the support plate is provided with a slide groove parallel to the axis of the wire distribution shaft, a wheel frame is slidably connected in the slide groove, a wire hanging wheel is rotatably connected to the wheel frame, and a driving member is installed on the top of the support plate to drive the wheel frame to reciprocate along the slide groove.

[0007] Preferably, the driving member includes a reciprocating screw rotatably connected to the top of the support plate, the reciprocating screw is transmission-connected to the rotating shaft, a sliding block is mounted on the reciprocating screw, and the sliding block is fixedly connected to the wheel frame.

[0008] Preferably, the rotating shaft, the reciprocating screw and the branch shaft are all equipped with pulleys, and a belt is commonly wrapped around the three pulleys.

[0009] Preferably, the rotating shaft includes a driving shaft and a driven shaft that are coaxial. The driving shaft is fixedly connected to the side of the handwheel, the driven shaft is rotatably connected to the mounting bracket, both the driving shaft and the driven shaft are provided with regular polygon pin holes, and the pin hole on the driven shaft is a through hole. A locking pin that fits the pin hole is slidably connected in the pin hole on the driven shaft, and the pulley on the rotating shaft is specifically installed on the driven shaft.

[0010] Preferably, limiting plates are fixedly connected to the positions of the main spindle and the sub-spindle close to the mounting bracket, and a locking plate is detachably installed at the suspended end of the main spindle and the sub-spindle.

[0011] Preferably, the main spindle and the sub-spindle are threadedly connected to the locking plate, and an operating rod for convenient screwing is fixedly connected to the locking plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] In this application, by providing a mounting bracket on the table board, the driving mechanism on the sewing machine can drive the sub-spindle and the wire guiding assembly on the mounting bracket to operate and then perform wire splitting work. This not only makes the wire splitting work simpler and more convenient, but also the winding of the sewing thread is relatively uniform; overall, it improves the efficiency of the wire splitting work and the winding quality of the sewing thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the sewing machine body of the present utility model;

[0015] Figure 2 is an overall structural diagram of the present utility model after installing the wire splitting mechanism on the sewing machine body;

[0016] Figure 3 is Figure 2 a schematic enlarged view of the structure at A in

[0017] Figure 4 is Figure 3 a schematic structural diagram of the wire guiding assembly at B in

[0018] Figure 5 is an exploded schematic diagram of the wire splitting mechanism of the present utility model.

[0019] In the figure: 10, frame; 11, table board; 12, machine head; 121, handwheel; 13, driving mechanism; 2, rotating shaft; 21, driving shaft; 22, driven shaft; 23, pin hole; 24, locking pin; 3, mounting bracket; 41, main spindle; 42, sub-spindle; 5, wire guiding assembly; 51, support plate; 52, sliding groove; 53, wheel bracket; 54, thread hanging wheel; 55, driving member; 551, reciprocating lead screw; 552, slider; 61, pulley; 62, belt; 71, limiting plate; 72, locking plate; 73, operating rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please refer to Figure 1 - Figure 5 The present embodiment provides a sewing machine thread dividing mechanism, which is installed on a sewing machine body. The sewing machine body includes a frame 10, a table 11 fixed to the frame 10, a head 12 installed on the table 11, and a driving mechanism 13 for driving the head 12 to operate. A handwheel 121 is installed on the head 12. It should be noted that the driving mechanism 13 rotates the pulley driven by the connecting rod and the crankshaft by stepping on the pedal, and then rotates the handwheel 121 on the head 12 under the transmission of the belt, and also drives the mechanism inside the head 12 to operate to achieve sewing work.

[0022] The wire splitting mechanism of the embodiment of the present application includes a rotating shaft 2 installed on the side of the hand wheel 121; a mounting frame 3 is fixed on the table 11 by bolts, and a main line shaft 41 and a branch line shaft 42 are rotatably connected to the mounting frame 3 through bearings. The main line shaft 41 and the branch line shaft 42 are both suspended at one end to facilitate the installation of the bobbin; for the sake of convenience, we will record the bobbin with sewing thread before the wire splitting work as the main line bobbin, and the bobbin without sewing thread as the branch line bobbin. The wire splitting work is to distribute the sewing thread on the main line bobbin to the branch line bobbin. The main line bobbin is installed on the main line shaft 41, and the branch line barrel is installed on the branch line shaft 42, and the branch line shaft 42 is connected to the rotating shaft 2 in a transmission manner. A lead assembly 5 is installed on the mounting frame 3, and the lead assembly 5 is located between the main line shaft 41 and the branch line shaft 42.

[0023] Specifically, refer to Figure 3 - Figure 5 The lead assembly 5 includes a support plate 51 fixedly connected to the mounting frame 3, a slide groove 52 parallel to the axis of the branching shaft 42 is opened on the support plate 51, a wheel frame 53 is slidably connected in the slide groove 52, a wire hanging wheel 54 is rotatably connected to the wheel frame 53, and a driving member 55 is installed on the top of the support plate 51 to drive the wheel frame 53 to reciprocate along the slide groove 52. It should be noted here that the height of the wire hanging wheel 54 is higher than the height of the two branching shafts 42.

[0024] Further, see Figure 4 and Figure 5, the driving member 55 includes a reciprocating lead screw 551 rotatably connected to the top of the support plate 51, and the reciprocating lead screw 551 is drivingly connected to the rotating shaft 2. A slider 552 is mounted on the reciprocating lead screw 551, and the slider 552 is fixedly connected to the wheel frame 53.

[0025] Furthermore, referring to Figure 5 , pulley wheels 61 are mounted on the rotating shaft 2, the reciprocating lead screw 551, and the wire dividing shaft 42. A belt 62 is wound around the three pulley wheels 61. By driving the rotation of the rotating shaft 2, the wire dividing shaft 42 is driven to perform wire dividing work under the transmission of the belt 62 and the pulley wheels 61, and at the same time, the reciprocating lead screw 551 is driven to rotate to further perform the guiding work of sewing thread winding.

[0026] The following is a further introduction in combination with a specific usage scenario. When wire dividing work is required, the main thread bobbin is installed on the main thread shaft 41, the wire dividing bobbin is installed on the wire dividing shaft 42, and then the leading end of the sewing thread on the main thread bobbin is pulled out. After passing around the thread hanging wheel 54 of the wire guiding assembly 5, the leading end of the sewing thread is fixed on the wire dividing bobbin. Next, the user can step on the foot pedal of the sewing machine, so that the driving mechanism 13 of the sewing machine body operates to drive the hand wheel 121 to rotate at a high speed, and further drive the rotating shaft 2 to rotate at a high speed. Through the transmission of the belt 62 and the pulley wheels 61, the wire dividing shaft 42 and the wire dividing bobbin mounted on the wire dividing shaft 42 can be driven to rotate rapidly, so that the sewing thread can be wound from the main thread bobbin to the wire dividing bobbin little by little, thereby realizing the wire dividing work.

[0027] In addition, the reciprocating lead screw 551 is also driven to rotate synchronously through the transmission of the belt 62 and the pulley wheels 61. Here, a brief introduction to the reciprocating lead screw 551 is needed: the reciprocating lead screw 551 has two thread grooves with the same pitch and opposite helix directions, and the two ends are connected by transition curves. By using the reciprocating lead screw 551, the slider 552 can achieve reciprocating motion without changing the rotation direction. In this way, by driving the rotation of the reciprocating lead screw 551 through the rotating shaft 2, the slider 552, the wheel frame 53, and the thread hanging wheel 54 can be driven to reciprocate along the sliding groove 52, so that the sewing thread wound on the wire dividing bobbin can be more evenly wound, improving the winding quality of the sewing thread on the wire dividing bobbin.

[0028] Overall, in this application, by providing the mounting frame 3 on the table board 11, the driving mechanism 13 on the sewing machine can drive the wire dividing shaft 42 and the wire guiding assembly 5 on the mounting frame 3 to operate to perform wire dividing work. This not only makes the wire dividing work simpler and more convenient, but also the winding of the sewing thread is relatively uniform, improving the efficiency of the wire dividing work and the winding quality of the sewing thread.

[0029] Referring to Figure 3 and Figure 5As a specific implementation of the embodiment of the present application, the rotating shaft 2 includes a coaxial driving shaft 21 and a driven shaft 22, the driving shaft 21 is fixedly connected to the side of the handwheel 121, and the driven shaft 22 is rotatably connected to the mounting frame 3, and a regular polygonal pin hole 23 is provided on both the driving shaft 21 and the driven shaft 22, and the pin hole 23 on the driven shaft 22 is a through hole, and a locking pin 24 that fits the pin hole 23 is slidably connected in the pin hole 23 on the driven shaft 22, and the pulley 61 on the rotating shaft 2 is specifically installed on the driven shaft 22.

[0030] In combination with specific usage scenarios, by setting the rotating shaft 2 to be split, the locking pin 24 can be pulled out when sewing work is required and line separation work is not required, thereby reducing the waste of driving force on the line separation mechanism; it is only necessary to insert one end of the pin hole 23 of the driven shaft 22 of the locking pin 24 into the pin hole 23 of the driving shaft 21 when line separation work is required, and use the locking pin 24 to make the driving shaft 21 and the driven shaft 22 become one, so that when the driving hand wheel 121 is rotated, it can drive the line separation work.

[0031] Reference Figure 3 and Figure 5 As a specific implementation of the embodiment of the present application, a limit plate 71 is fixedly connected to the main line shaft 41 and the branch line shaft 42 near the mounting frame 3, and a locking plate 72 is detachably installed at the suspended end of the main line shaft 41 and the branch line shaft 42. Further, the main line shaft 41 and the branch line shaft 42 are threadedly connected to the locking plate 72, and an operating rod 73 for convenient twisting is fixedly connected to the locking plate 72.

[0032] In combination with the specific usage scenario, before dividing the wires, insert the wire dividing tube into the wire dividing shaft 42, and then install the locking plate 72. The locking plate 72 is screwed by turning the operating lever 73 until the locking plate 72 and the limit plate 71 clamp the wire dividing tube. Similarly, the main wire tube is installed on the main wire shaft 41 in the same way and locked. Since the main wire tube and the wire dividing tube are locked, there will be no axial movement, which can ensure the stability of the wire dividing work.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A sewing machine thread dividing mechanism, mounted on a sewing machine body, the sewing machine body comprising a frame (10), a table (11) fixed to the frame (10), a machine head (12) mounted on the table (11), and a driving mechanism (13) for driving the machine head (12) to operate, the machine head (12) being mounted with a hand wheel (121), characterized in that: include: A rotating shaft (2) is mounted on the side of the hand wheel (121); A mounting frame (3) fixedly connected to the table plate (11); The main line shaft (41) and the branch line shaft (42) are both connected to the mounting frame (3) at one end for horizontal rotation, and the other end is suspended in the air, and the rotating shaft (2) is connected to the branch line shaft (42) in a transmission manner; A lead assembly (5) is mounted on the mounting frame (3); the lead assembly (5) is located between the main line shaft (41) and the branch line shaft (42); and the lead assembly (5) is drivingly connected to the rotating shaft (2).

2. A thread dividing mechanism for a sewing machine according to claim 1, characterized in that: The lead assembly (5) comprises a support plate (51) fixedly connected to the mounting frame (3); a slide groove (52) parallel to the axis of the wire distribution shaft is formed on the support plate (51); a wheel frame (53) is slidably connected in the slide groove (52); a wire hanging wheel (54) is rotatably connected to the wheel frame (53); and a driving member (55) is installed on the top of the support plate (51) for driving the wheel frame (53) to reciprocate along the slide groove (52).

3. A thread dividing mechanism for a sewing machine according to claim 2, characterized in that: The driving member (55) comprises a reciprocating screw (551) rotatably connected to the top of the support plate (51), the reciprocating screw (551) being transmission-connected to the rotating shaft (2), a sliding block (552) being mounted on the reciprocating screw (551), and the sliding block (552) being fixedly connected to the wheel frame (53).

4. A thread dividing mechanism for a sewing machine according to claim 3, characterized in that: The rotating shaft (2), the reciprocating screw (551), and the line dividing shaft (42) are all equipped with pulleys (61), and a belt (62) is commonly wound around the three pulleys (61).

5. A thread dividing mechanism for a sewing machine according to claim 4, characterized in that: The rotating shaft (2) comprises a coaxial driving shaft (21) and a driven shaft (22); the driving shaft (21) is fixedly connected to a side of a hand wheel (121); the driven shaft (22) is rotatably connected to a mounting frame (3); the driving shaft (21) and the driven shaft (22) are both provided with a regular polygonal pin hole (23); the pin hole (23) on the driven shaft (22) is a through hole; a locking pin (24) fitting into the pin hole (23) is slidably connected in the pin hole (23) on the driven shaft (22); and the pulley (61) on the rotating shaft (2) is specifically mounted on the driven shaft (22).

6. A thread dividing mechanism for a sewing machine according to claim 1, characterized in that: The main line shaft (41) and the branch line shaft (42) are fixedly connected to a limiting plate (71) at positions close to the mounting frame (3), and the suspended ends of the main line shaft (41) and the branch line shaft (42) are detachably mounted with locking plates (72).

7. A thread dividing mechanism for a sewing machine according to claim 6, characterized in that: The main line shaft (41) and the branch line shaft (42) are threadedly connected to the locking plate (72), and an operating rod (73) is fixedly connected to the locking plate (72) for easy screwing.

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