Rotary device, control method of rotary device, and sewing machine

Abstract

The present disclosure relates to the sewing machine technical field, especially to a rotating device, a control method of the rotating device and a sewing machine, solve the safety problem of high maintenance and use cost of the subsequent sewing machine in the prior art, serious wear of the electric slip ring and the elastic conductive contact piece, a rotating device, comprising a first driving motor and a first transmission assembly, the first driving motor is used for driving the first transmission assembly to move, the first transmission assembly includes a first synchronous pulley, a spring wire is connected to the first synchronous pulley, the spring wire spirally extends around the axis of the rotating shaft of the first synchronous pulley, the first synchronous pulley is connected to a driven mechanism, and the first driving motor controls the rotation of the driven mechanism through the first transmission assembly.

Description

Technical Field

[0001] This disclosure relates to the field of sewing machine technology, and in particular to a rotating device, a control method for the rotating device, and a sewing machine. Background Technology

[0002] A sewing machine is a commonly used sewing device. It is a machine that uses one or more sewing threads to form one or more tracks on the fabric, allowing one or more layers of fabric to interweave or sew together. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, as well as products made of leather, plastic, and paper. The stitches produced are neat, beautiful, flat, and strong. Sewing speed is fast, and it is easy to use.

[0003] Currently, there are various types of sewing machines (e.g., computerized sewing machines with a 360-degree rotating driven mechanism (or 360-degree rotating perfect stitch sewing machines, computerized pattern template sewing machines)). However, sewing machines of all structures typically include an upper driven mechanism, a lower driven mechanism that cooperates with the upper driven mechanism, and a sewing platform for placing the fabric. The upper driven mechanism is the main part of the sewing machine, usually consisting of four mechanisms: needle insertion, thread hooking, thread take-up, and feed, as well as auxiliary mechanisms such as thread winding, pressing, and feed dog. The upper driven mechanism is usually located above the sewing platform, and for computerized sewing machines with a 360-degree rotating driven mechanism, the upper driven mechanism can rotate relative to the sewing platform. The lower driven mechanism typically includes a rotary hook mechanism, which is usually located below the sewing platform and at the position corresponding to the upper driven mechanism. In order for the rotary hook mechanism to cooperate with the upper driven mechanism (specifically with the needle of the upper driven mechanism), the lower driven mechanism can also rotate relative to the frame to complete the sewing work more perfectly.

[0004] Patent CN217479716U discloses a rotating mechanism and a sewing machine using the same mechanism. The rotating mechanism includes a drive motor and a transmission assembly. The drive motor drives a driven mechanism to rotate via the transmission assembly, which is a belt drive. The drive motor has a first mounting plate and a second mounting plate. The first mounting plate is used to mount the drive motor, and the second mounting plate is located at the end of the drive motor's output shaft. Both the first and second mounting plates have oblong holes for mounting on the housing of the driven mechanism. The tension of the transmission assembly can be adjusted by adjusting the position of the oblong holes on the housing. This rotating mechanism is simple in structure, lightweight, facilitates the disassembly and assembly of the timing pulley for later maintenance, and also facilitates the tension adjustment of the timing belt. However, the driven mechanism of this sewing machine requires the coordinated action of an electric slip ring and an elastic conductive contact to achieve rotation. On the one hand, the electric slip ring is expensive, and the electric slip ring and the elastic conductive contact will move relative to each other during operation. Moreover, the electric slip ring and the elastic conductive contact will wear down over time, requiring regular replacement, which leads to higher maintenance and operating costs for the sewing machine. On the other hand, if the electric slip ring and the elastic conductive contact are severely worn, electric sparks will be generated during operation. Electric sparks splashing onto sewing machine parts or falling onto the fabric can cause safety problems. Summary of the Invention

[0005] In view of the safety problems caused by the high maintenance and use costs of existing sewing machines and the severe wear of slip rings and elastic conductive contacts, this disclosure provides a rotating device, a control method for the rotating device, and a sewing machine. The rotating device is inexpensive, has a long maintenance cycle, and a high safety factor.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problems is as follows: a rotating device, including a first drive motor and a first transmission assembly, wherein the first drive motor is used to drive the first transmission assembly to move, the first transmission assembly includes a first synchronous pulley, a spring wire is connected to the first synchronous pulley, the spring wire extends spirally around the axis of rotation of the first synchronous pulley, the first synchronous pulley is connected to the driven mechanism, and the first drive motor controls the rotation of the driven mechanism through the first transmission assembly.

[0007] Furthermore, an air tube is also connected to the first synchronous pulley, and the spring wire wraps around the axis of the air tube. The straight line of the air tube coincides with the rotation axis of the first synchronous pulley. A connecting plate is provided on the side of the first synchronous pulley where the air tube and the spring wire are connected, and the air tube and the spring wire are connected to the first synchronous pulley through the connecting plate.

[0008] Furthermore, the connecting plate is provided with a first insertion hole, and one end of the spring wire is disposed in the first insertion hole; a first mounting plate is provided above the connecting plate, and a second insertion hole is provided on the first mounting plate, and the other end of the spring wire is disposed in the second insertion hole.

[0009] Furthermore, a first working hole is provided in the center of the connecting plate, the first end of the air pipe is set in the first working hole, and the second end is set on the first mounting plate.

[0010] Furthermore, a connector is provided on one side of the first mounting plate. The connector is U-shaped and includes a horizontal plate and two parallel vertical plates. The first mounting plate is attached to the horizontal plate. The free ends of the two vertical plates are provided with bending structures. The horizontal plate and the two vertical plates are integrally formed. The horizontal plate is parallel to the connecting plate. The horizontal plate is provided with a hollow part. The spring wire and the air pipe pass through the hollow part and are connected to the first mounting plate.

[0011] Furthermore, there are multiple spring wires, which are wrapped around the outside of the air tube in the same direction, and the air tube is located in the middle of the space surrounded by the multiple spring wires.

[0012] Furthermore, the first transmission assembly also includes a second synchronous pulley and a synchronous belt for connecting the first synchronous pulley and the second synchronous pulley. The first synchronous pulley is used to connect to the driven mechanism, and the second synchronous pulley is connected to the output shaft of the drive motor.

[0013] A method for controlling a rotating device includes the following steps:

[0014] S1: The first drive motor drives the first synchronous belt pulley to move, the first synchronous belt pulley drives the connecting plate and the driven mechanism to rotate a certain number of times, and the connecting plate drives the spring wire to rotate around the air pipe.

[0015] S2: After the driven mechanism rotates a certain number of times, the first drive motor drives the first synchronous pulley to rotate in the opposite direction of S1. The first synchronous pulley drives the connecting plate and the driven mechanism to rotate a certain number of times, and the connecting plate drives the spring wire to rotate around the air pipe.

[0016] Preferably, in S1, the first synchronous pulley drives the driven mechanism to rotate 3 to 8 revolutions, and the spring wire rotates in the same direction as the driven mechanism, so that the driven mechanism works while rotating.

[0017] In some implementations, the driven mechanism in S2 does not operate during rotation.

[0018] In some implementations, the driven mechanism in S2 operates while rotating.

[0019] A sewing machine includes a frame, a table on the frame, a fixed arm and a rotary hook mechanism on the table, the fixed arm being located at a first end of the table, the rotary hook mechanism being located at a second end of the table, and a rotating device as described above being provided on the fixed arm. Both the driven mechanism and the rotating device are located on the fixed arm.

[0020] Furthermore, the rotary shuttle mechanism includes a rotary shuttle base and a mounting base. The mounting base is disposed above the platform, and the aforementioned rotating device is disposed below the platform. A second bearing is disposed below the rotary shuttle base, and the rotary shuttle base is connected to the rotating device through the second bearing.

[0021] Furthermore, the shuttle seat is connected to the first synchronous belt pulley via the second bearing, and the first drive motor controls the rotation of the shuttle mechanism via the first transmission assembly.

[0022] Furthermore, when the rotating mechanism is mounted on the fixed arm, the driven mechanism is the machine head; when the rotating mechanism is mounted below the table, the driven mechanism is the rotary shuttle mechanism.

[0023] Furthermore, the rotary shuttle seat includes a rotary shuttle working chamber, with the machine head corresponding to the rotary shuttle working chamber.

[0024] Furthermore, a machine head housing is provided on the outside of the machine head, and a first bearing is provided below the first synchronous pulley. The machine head housing is connected to the first synchronous pulley through the first bearing.

[0025] Compared with existing products, the beneficial effects of this disclosure are as follows: Because the connecting plate is equipped with an air tube and a spring wire, and the spring wire surrounds the air tube along its axis, the driven mechanism can achieve rotation without using slip rings and elastic conductive contacts. This effectively avoids wear on slip rings and elastic conductive contacts, reduces maintenance frequency and operating costs, and ensures greater safety by eliminating electrical sparks during operation. Furthermore, the use of this rotating device in the sewing machine reduces its cost and maintenance frequency, and ensures greater safety by eliminating electrical sparks during operation. Attached Figure Description

[0026] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0027] Figure 1 This is a structural schematic diagram of a sewing machine disclosed herein;

[0028] Figure 2 This is a schematic diagram of the connection between the rotating device and the housing of the driven mechanism disclosed herein;

[0029] Figure 3 This is a schematic diagram of the connection between the rotating device and the rotary hook seat disclosed herein;

[0030] Figure 4 This is a cross-sectional view of the connection between the rotating device and the rotary hook seat disclosed herein.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Fixed arm; 2. Platform; 3. Frame; 4. Head housing; 6. Mounting base; 7. Connecting parts; 8. First mounting plate; 9. Spring wire; 10. Air pipe; 11. First synchronous pulley; 12. Connecting plate; 13. First bearing; 14. Rotary shuttle seat; 15. Rotary shuttle working chamber; 16. Second bearing. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0034] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0035] During the operation of a sewing machine, the driven mechanism and the rotary hook mechanism will rotate in both directions. The rotation of the driven mechanism and the rotary hook mechanism are powered and signal transmitted by electric slip rings. The principle of electric slip rings is to transmit electrical energy and signals by rotating friction contact. This can easily lead to unstable transmission of electrical energy and signals. Because electric slip rings are expensive and wear out over time, their lifespan is short, which affects the overall cost of the sewing machine.

[0036] Therefore, the present invention provides a rotating device, such as Figure 2As shown, the device includes a first drive motor and a first transmission assembly. The first drive motor drives the first transmission assembly. The first transmission assembly includes a first synchronous pulley 11, on which an air tube 10 and a spring wire 9 are connected. The spring wire 9 extends spirally around the axis of rotation of the first synchronous pulley 11, and encircles the air tube 10 around its axis. A machine head is located below the first synchronous pulley 11, and the first drive motor controls the rotation of the machine head through the first transmission assembly. A connecting plate 12 is provided on the side of the first synchronous pulley 11 where the air tube 10 and spring wire 9 are connected. The air tube 10 and spring wire 9 are connected to the first synchronous pulley 11 through the connecting plate 12. A first insertion hole is provided on the connecting plate 12, and one end of the spring wire 9 is placed in the first insertion hole. A first mounting plate 8 is provided above the connecting plate 12, and a second insertion hole is provided on the first mounting plate 8, where the other end of the spring wire 9 is placed. It should be noted that the spring wire 9 here is a spring cable, also known as a spiral cable. Spring cables possess excellent flexibility and elasticity (the elongation can reach 3.5 to 4 times the original spring length), and have good cold resistance, flame retardancy, oil resistance, and abrasion resistance. The first drive motor drives the first synchronous pulley 11 to rotate, which in turn drives the machine head housing 4 and the connecting plate 12 to rotate, thus causing the spring wire 9 to rotate as well. It should be noted that the air pipe 10 may or may not rotate during the rotation of the spring wire 9.

[0037] A first working hole is provided in the center of the connecting plate 12. The first end of the air pipe 10 is set in the first working hole, and the second end is set on the first mounting plate 8. A connector 7 is provided on one side of the first mounting plate 8. The connector 7 is U-shaped and includes a horizontal plate and two parallel vertical plates. The first mounting plate 8 is attached to the horizontal plate. The free ends of the two vertical plates are provided with bending structures. The horizontal plate and the two vertical plates are integrally formed. The horizontal plate is parallel to the connecting plate 12 and has a hollow part. The spring wire 9 and the air pipe 10 pass through the hollow part and connect to the first mounting plate 8. There are multiple spring wires 9. The multiple spring wires 9 are wrapped around the outside of the air pipe 10 in the same direction. The multiple spring wires 9 correspond to different insertion holes. The spring wires 9 wrap around the axis of the air pipe 10. This arrangement allows the multiple spring wires 9 to keep synchronous when rotating and avoids the multiple spring wires 9 from crossing or tangling during rotation. It can be understood that the number of spring wires 9 can be determined according to the actual equipment to be connected, and no specific limit is made here.

[0038] It should be noted that the straight line of the air pipe 10 coincides with the rotation axis of the first synchronous pulley 11. The air pipe 10 is in the middle of the space surrounded by all the spring wires 9, which further ensures that the spring wires 9 can maintain synchronization when rotating, making the rotating device more stable when working.

[0039] The first transmission assembly also includes a second synchronous pulley and a synchronous belt for connecting the first synchronous pulley 11 and the second synchronous pulley. The first synchronous pulley 11 is connected to the machine head, and the second synchronous pulley is connected to the output shaft of the drive motor. A machine head housing 4 is provided on the outside of the machine head, and a first bearing 13 is provided below the first synchronous pulley 11. The machine head housing 4 is connected to the first synchronous pulley 11 through the first bearing 13. Using synchronous belt transmission is relatively precise, without slippage. The transmission efficiency of the synchronous belt is relatively high, and the vibration during transmission is small, preventing damage to the motor. Furthermore, since the synchronous belt uses a load-bearing rope made of materials such as fiber and steel wire made of glass, it has a relatively low expansion rate and will not elongate or deform during operation. Also, the synchronous belt does not require auxiliary equipment such as lubricating oil, resulting in relatively low maintenance costs.

[0040] A method for controlling a rotating device includes the following steps:

[0041] S1: The first drive motor drives the first synchronous belt pulley to move, the first synchronous belt pulley drives the connecting plate and the driven mechanism to rotate a certain number of times, and the connecting plate drives the spring wire to rotate around the air pipe.

[0042] S2: After the driven mechanism rotates a certain number of times, the first drive motor drives the first synchronous pulley to rotate in the opposite direction of S1. The first synchronous pulley drives the connecting plate and the driven mechanism to rotate a certain number of times, and the connecting plate drives the spring wire to rotate around the air pipe.

[0043] Preferably, in S1, the first synchronous pulley drives the driven mechanism to rotate 3-8 revolutions, and the spring wire rotates in the same direction as the driven mechanism. The driven mechanism works while rotating. The machine head works while rotating, and by utilizing the characteristics of the spring wire 9, the machine head can achieve the purpose of rotation without using slip rings and elastic conductive contacts, rotating a certain number of revolutions.

[0044] In some implementations, the driven mechanism in S2 does not operate during rotation.

[0045] In some implementations, the driven mechanism in S2 operates while rotating.

[0046] In the S2, the driven mechanism has two modes during rotation: non-operation and operation. Users can choose different modes according to the actual situation, which has a wider range of applicability and better flexibility.

[0047] like Figure 1As shown, this application also provides a sewing machine, including a frame 3, a table 2 on the frame 3, a fixed arm 1 and a rotary hook mechanism on the table 2, the fixed arm 1 being disposed at the first end of the table 2, the rotary hook mechanism being disposed at the second end of the table 2, the fixed arm 1 being disposed with the aforementioned rotating device, the sewing head and the rotating device being disposed on the fixed arm 1, and the sewing head and the rotary hook mechanism being disposed correspondingly.

[0048] like Figures 3-4 As shown, the rotary hook mechanism includes a rotary hook base 14 and a mounting base 6. The mounting base 6 is positioned above the table plate 2, and the aforementioned rotating device is positioned below the table plate 2. When the rotating device is positioned below the table plate, the driven mechanism is the rotary hook mechanism. A second bearing 16 is positioned below the rotary hook base 14, and the rotary hook base 14 is connected to the rotating device via the second bearing 16. Utilizing the characteristics of the spring wire 9, the rotary hook base 14 can achieve rotation without using an electric slip ring, rotating a certain number of times. The rotary hook base 14 is connected to the first synchronous belt pulley 11 via the second bearing 16, and the first drive motor controls the rotation of the rotary hook mechanism through the first transmission assembly. The rotary hook base 14 includes a rotary hook working chamber 15, and the sewing machine head corresponds to the rotary hook working chamber 15. When the sewing machine is working, the sewing machine head and the rotary hook mechanism operate in tandem.

[0049] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A rotating device, characterized in that, The device includes a first drive motor and a first transmission assembly. The first drive motor is used to drive the first transmission assembly to move. The first transmission assembly includes a first synchronous pulley (11). A spring wire (9) is connected to the first synchronous pulley (11). The spring wire (9) extends spirally around the axis of rotation of the first synchronous pulley (11). The first synchronous pulley (11) is connected to the driven mechanism. The first drive motor controls the rotation of the driven mechanism through the first transmission assembly. An air tube (10) is also connected to the first synchronous pulley (11). The spring wire (9) surrounds the air tube (10) around the axis of rotation of the air tube (10). The straight line of the air tube (10) coincides with the axis of rotation of the first synchronous pulley (11).

2. The rotating device according to claim 1, characterized in that, A connecting plate (12) is provided on one side of the first synchronous pulley (11) where the air pipe (10) and the spring wire (9) are connected. The air pipe (10) and the spring wire (9) are connected to the first synchronous pulley (11) through the connecting plate (12).

3. A rotating device according to claim 2, characterized in that, The connecting plate (12) is provided with a first insertion hole, and one end of the spring wire (9) is placed in the first insertion hole; a first mounting plate (8) is provided above the connecting plate (12), and a second insertion hole is provided on the first mounting plate (8), and the other end of the spring wire (9) is placed in the second insertion hole.

4. A rotating device according to claim 3, characterized in that, The connecting plate (12) has a first working hole in the center, the first end of the air pipe (10) is set in the first working hole, and the second end is set on the first mounting plate (8).

5. A rotating device according to claim 3, characterized in that, A connector (7) is provided on one side of the first mounting plate (8). The connector (7) is U-shaped and includes a horizontal plate and two parallel vertical plates. The first mounting plate (8) is attached to the horizontal plate. The free ends of the two vertical plates are provided with bending structures. The horizontal plate and the two vertical plates are integrally formed. The horizontal plate is parallel to the connecting plate (12). The horizontal plate is provided with a hollow part. The spring wire (9) and the air pipe (10) pass through the hollow part and are connected to the first mounting plate (8).

6. A rotating device according to claim 5, characterized in that, The spring wires (9) are multiple, and the multiple spring wires (9) are wrapped around the outside of the air tube (10) in the same direction. The air tube (10) is located in the middle of the space surrounded by the multiple spring wires (9).

7. A rotating device according to claim 1, characterized in that, The first transmission assembly further includes a second synchronous pulley and a synchronous belt for connecting the first synchronous pulley (11) and the second synchronous pulley. The first synchronous pulley (11) is used to connect the driven mechanism, and the second synchronous pulley is connected to the output shaft of the drive motor.

8. A rotating device according to claim 7, characterized in that, The first drive motor drives the first transmission component to move, thereby causing the spring wire (9) to rotate around the air pipe (10) and the driven mechanism to rotate. The driven mechanism rotates 3 to 8 times, and the spring wire (9) and the driven mechanism rotate in the same direction. The driven mechanism works while rotating.

9. A rotating device according to claim 8, characterized in that, After the driven mechanism rotates 3 to 8 times, the first drive motor drives the first transmission component to move, which in turn drives the spring wire (9) and the driven mechanism to rotate in the opposite direction of the previous rotation. At this time, the driven mechanism does not work during the rotation.

10. A rotating device according to claim 8, characterized in that, After the driven mechanism rotates 3 to 8 times, the first drive motor drives the first transmission component to move, which in turn drives the spring wire (9) and the driven mechanism to rotate in the opposite direction of the previous rotation. At this time, the driven mechanism works while rotating.

11. A control method for a rotating device as described in any one of claims 1 to 10, characterized in that, Includes the following steps: S1: The first drive motor drives the first synchronous pulley (11) to move. The first synchronous pulley (11) drives the connecting plate (12) and the driven mechanism to rotate a certain number of times. The connecting plate (12) drives the spring wire (9) to rotate around the air pipe (10). S2: After the driven mechanism rotates a certain number of times, the first drive motor drives the first synchronous pulley (11) to rotate in the opposite direction of S1. The first synchronous pulley (11) drives the connecting plate (12) and the driven mechanism to rotate a certain number of times. The connecting plate (12) drives the spring wire (9) to rotate around the air pipe (10).

12. The control method for a rotating device according to claim 11, characterized in that, In S1, the first synchronous pulley (11) drives the driven mechanism to rotate 3 to 8 times. The spring wire (9) is in the same direction as the rotation of the driven mechanism. The driven mechanism works while rotating.

13. The control method for a rotating device according to claim 11, characterized in that, The driven mechanism in S2 does not work during rotation.

14. The control method for a rotating device according to claim 11, characterized in that, The driven mechanism in S2 operates while rotating.

15. A sewing machine, characterized in that, Includes a frame (3), on which a platform (2) is provided, and on which a fixed arm (1) and a rotary shuttle mechanism are provided, the fixed arm (1) is provided at the first end of the platform (2), the rotary shuttle mechanism is provided at the second end of the platform (2), and the fixed arm (1) is provided with a rotating device as described in any one of claims 1 to 10, and both the driven mechanism and the rotating device are provided on the fixed arm (1).

16. A sewing machine according to claim 15, characterized in that, The rotary shuttle mechanism includes a rotary shuttle seat (14) and a mounting seat (6). The mounting seat (6) is located above the platform (2). The rotating device is located below the platform (2). A second bearing (16) is located below the rotary shuttle seat (14). The rotary shuttle seat (14) is connected to the rotating device through the second bearing (16).

17. A sewing machine according to claim 16, characterized in that, The shuttle seat (14) is connected to the first synchronous pulley (11) via the second bearing (16), and the first drive motor controls the rotation of the shuttle mechanism via the first transmission assembly.

18. A sewing machine according to claim 16, characterized in that, When the rotating device is set on the fixed arm (1), the driven mechanism is the machine head; when the rotating device is set below the table (2), the driven mechanism is the rotary shuttle mechanism.

19. A sewing machine according to claim 18, characterized in that, The rotary shuttle seat (14) includes a rotary shuttle working chamber (15), and the machine head corresponds to the rotary shuttle working chamber (15).

20. A sewing machine according to claim 18, characterized in that, The machine head is provided with a machine head housing (4) on the outside, and a first bearing (13) is provided below the first synchronous pulley (11). The machine head housing (4) is connected to the first synchronous pulley (11) through the first bearing (13).

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