Cloth dragging wheel device for sewing machine

Abstract

The utility model discloses a cloth dragging wheel device for a sewing machine, which comprises a machine head, a mounting seat arranged on the machine head, a cloth dragging wheel cover body arranged on the mounting seat, a cloth dragging wheel assembly arranged in the cloth dragging wheel cover body, the cloth dragging wheel assembly comprises a cloth dragging wheel and a cloth dragging wheel swing seat, and the cloth dragging wheel is arranged at one end of the cloth dragging wheel swing seat. A transmission part is arranged at the other end of the cloth dragging wheel swing seat and used for driving the cloth dragging wheel to conduct auxiliary feeding, and a lifting and pressing part is arranged in the middle of the cloth dragging wheel swing seat and used for driving the cloth dragging wheel swing seat to conduct lifting and placing; the lifting and pressing part and the transmission part are driven by the first driving motor and the second driving motor to operate correspondingly, the cloth dragging action and the lifting and placing action of the cloth dragging wheel are achieved, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a sewing machine drag wheel device. Background Technology

[0002] Due to the special characteristics of the fabric and sewing thread, as well as the unique structure of the sewing machine, a rear dragging device is used in the market to ensure the flatness of the sewing material during the sewing process. This device can drag the fabric backward and drive the drag wheel upward to ensure the flatness of the sewing material.

[0003] However, most current products on the market use electromagnets and cylinders to lift the mop rollers. Electromagnets have many drawbacks, such as being bulky, generating a lot of heat, and being too large. Pneumatic devices are troublesome to install in factories, have many pipelines, are noisy during use, are inconvenient to adjust the downward pressure of the rollers, and the mop rollers are pressed down after the machine is turned off. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sewing machine drag wheel device to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sewing machine drag wheel device, including a machine head, a mounting base on the machine head, a drag wheel cover on the mounting base, a drag wheel assembly inside the drag wheel cover, the drag wheel assembly including a drag wheel and a drag wheel swing seat, the drag wheel being disposed at one end of the drag wheel swing seat, a transmission part being disposed at the other end of the drag wheel swing seat, the transmission part being used to drive the drag wheel for auxiliary feeding, and a lifting and pressing part being disposed in the middle of the drag wheel swing seat, the lifting and pressing part being used to drive the drag wheel swing seat to lift and lower.

[0006] Furthermore, the lifting and pressing part is equipped with a first drive motor, which is located at the top of the front end of the mop wheel cover, and the transmission part is equipped with a second drive motor, which is located at the middle of the front end of the mop wheel cover.

[0007] Furthermore, the transmission unit is provided with a drive wheel and a synchronous wheel. The drive wheel is mounted on the motor shaft of the second drive motor. A first synchronous belt is provided at the front end of the drive wheel and the synchronous wheel. A second synchronous belt is provided between the rear end of the synchronous wheel and the mop wheel. The second synchronous belt is sleeved on the outer peripheral wall of the mop wheel swing seat.

[0008] Furthermore, the lifting and pressing part includes a lifting and pressing wheel, a pressing rod, and a pressing rod connecting block. The lifting and pressing wheel is eccentrically connected to the motor shaft of the first drive motor. The pressing rod is provided with a pressing rod sleeve. The pressing rod is disposed inside the pressing rod sleeve and extends downward through the pressing rod sleeve to connect with the pressing rod connecting block. The front end of the pressing rod sleeve is connected to the lifting and pressing wheel.

[0009] Furthermore, the eccentricity angle between the lifting wheel and the first drive motor is 0°-15°.

[0010] Furthermore, a compression spring is installed inside the pressure rod, a pressure plate is installed on the top of the compression spring, an adjusting nut is installed on the top of the pressure plate, and an adjusting screw is installed on the top of the adjusting nut.

[0011] Furthermore, the side wall of the pressure rod sleeve is provided with a pressure adjusting fixing seat, and the pressure adjusting nut is located inside the pressure adjusting fixing seat.

[0012] The beneficial technical effects of this utility model are: by driving the lifting and pressing part and the transmission part with the first drive motor and the second drive motor respectively, the mop roller can perform the mopping action and lifting and lowering action. The structure is simple and the operation is convenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of the transmission part of this utility model;

[0015] Figure 3 This is a schematic diagram of the overall structure of the lifting and pressing part of this utility model;

[0016] Figure 4 This is a schematic diagram of the overall structure assembly of this utility model;

[0017] Figure 5 This is a cross-sectional view of the overall structure of this utility model.

[0018] Reference numerals: 1. Machine head; 11. Mounting base; 2. Drag wheel cover; 3. Drag wheel assembly; 31. Drag wheel; 32. Drag wheel swing seat; 4. Transmission unit; 41. Second drive motor; 42. Drive wheel; 43. Synchronous pulley; 44. First synchronous belt; 45. Second synchronous belt; 5. Lifting and pressing unit; 51. First drive motor; 52. Lifting and pressing lifting wheel; 53. Pressing rod; 54. Pressing rod connecting block; 55. Compression spring; 56. Pressing plate; 57. Adjusting nut; 58. Adjusting screw; 59. Adjusting fixing seat. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] Example 1, referring to Figure 1-5As shown, a sewing machine drag wheel 31 device includes a machine head 1, a mounting base 11, a drag wheel cover 2 on the mounting base 11, a drag wheel assembly 3 inside the drag wheel cover 2, the drag wheel assembly 3 including a drag wheel 31 and a drag wheel swing seat 32, the drag wheel 31 being disposed at one end of the drag wheel swing seat 32, the other end of the drag wheel swing seat 32 being disposed of a transmission part 4, the transmission part 4 being used to drive the drag wheel 31 to perform auxiliary feeding, and a lifting and pressing part 5 being disposed in the middle of the drag wheel swing seat 32, the lifting and pressing part 5 being used to drive the drag wheel swing seat 32 to lift and lower.

[0021] The lifting and pressing part 5 is equipped with a first drive motor 51, which is located at the top of the front end of the mop wheel cover 2. The first drive motor 51 is a stepper motor. The lifting and pressing part 5 includes a lifting and pressing wheel 52, a pressing rod 53, and a pressing rod connecting block 54. The lifting and pressing wheel 52 is eccentrically connected to the motor shaft of the first drive motor 51. The eccentricity angle between the lifting and pressing wheel 52 and the first drive motor 51 is 0°-15°. The pressing rod 53 is equipped with a pressing rod sleeve. The pressing rod 53 is located inside the pressing rod sleeve and extends downward through the pressing rod sleeve to connect with the pressing rod connecting block 54. The front end of the pressing rod sleeve is connected to the lifting and pressing wheel 52. A compression spring 55 is provided inside the pressing rod 53. A pressure plate 56 is provided on the top of the compression spring 55. A pressure adjusting nut 57 is provided on the top of the pressure plate 56. A pressure adjusting screw 58 is provided on the top of the pressure adjusting nut 57. A pressure adjusting fixing seat 59 is provided on the side wall of the pressing rod sleeve. The pressure adjusting nut 57 is located inside the pressure adjusting fixing seat 59.

[0022] The transmission part 4 is provided with a second drive motor 41, which is located in the middle of the front end of the mop wheel cover 2. The second drive motor 41 is a stepper motor. The transmission part 4 is provided with a drive wheel 42 and a synchronous wheel 43. The drive wheel 42 is located on the motor shaft of the second drive motor 41. A first synchronous belt 44 is provided at the front end of the drive wheel 42 and the synchronous wheel 43. A second synchronous belt 45 is provided between the rear end of the synchronous wheel 43 and the mop wheel 31. The second synchronous belt 45 is sleeved on the outer peripheral wall of the mop wheel swing seat 32.

[0023] When forward sewing is required, the sewing machine's electronic control system controls the second drive motor 41 to rotate clockwise, causing the drive wheel 42 on the motor to rotate. This, in turn, causes the synchronous wheel 43 to rotate via the first synchronous belt 44, and then the synchronous wheel 43 drives the mop wheel 31 to rotate clockwise via the second synchronous belt 45, thus achieving the purpose of forward sewing. When reverse sewing is required, the sewing machine controls the first drive motor 51 to rotate counterclockwise, causing the drive wheel 42 on the motor to rotate. This, in turn, causes the synchronous wheel 43 to rotate via the first synchronous belt 44, and then the synchronous wheel 43 drives the mop wheel 31 to rotate counterclockwise via the second synchronous belt 45, thus achieving the purpose of reverse feeding.

[0024] When it is necessary to raise the mop wheel 31, the control box controls the first drive motor 51 to rotate counterclockwise, causing the motor shaft on the first drive motor 51 to be eccentrically connected to the lifting wheel 52, which in turn causes the pressure rod 53 connected to the lifting wheel 52 to move upward, thereby causing the pressure rod connecting block 54 to move upward, and thus causing the mop wheel swing seat 32 to move upward, thereby achieving the purpose of raising the mop wheel. When it is necessary to lower the mop wheel, the control box controls the first drive motor 51 to rotate clockwise or continue to rotate counterclockwise to the origin, causing the motor shaft on the first drive motor 51 to be eccentrically connected to the lifting wheel 52, which in turn causes the pressure rod 53 connected to the lifting wheel 52 to move downward, thereby causing the pressure rod connecting block 54 to move downward, and thus causing the mop wheel swing seat 32 to move downward, thereby achieving the purpose of lowering the mop wheel.

[0025] When adjusting the pressure of the mop roller, the flip cover on the mop roller cover 2 can be opened to operate the pressure adjusting screw 58 inside the cover. The pressure adjusting screw 58 adjusts the pressure spring 55 on the pressure rod 53, thereby achieving the purpose of adjusting the pressure of the mop roller 31.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A sewing machine drag wheel device, comprising a machine head (1), characterized in that: The machine head (1) is provided with a mounting base (11), and a mop wheel cover (2) is provided on the mounting base (11). A mop wheel assembly (3) is provided inside the mop wheel cover (2). The mop wheel assembly (3) includes a mop wheel (31) and a mop wheel swing seat (32). The mop wheel (31) is located at one end of the mop wheel swing seat (32), and a transmission part (4) is provided at the other end of the mop wheel swing seat (32). The transmission part (4) is used to drive the mop wheel (31) to perform auxiliary feeding. A lifting and pressing part (5) is provided in the middle of the mop wheel swing seat (32). The lifting and pressing part (5) is used to drive the mop wheel swing seat (32) to lift and lower.

2. The sewing machine drag wheel device according to claim 1, characterized in that: The lifting and pressing part (5) is provided with a first drive motor (51), which is located at the top of the front end of the mop wheel cover (2). The transmission part (4) is provided with a second drive motor (41), which is located at the middle of the front end of the mop wheel cover (2).

3. The sewing machine drag wheel device according to claim 2, characterized in that: The transmission part (4) is provided with a drive wheel (42) and a synchronous wheel (43). The drive wheel (42) is mounted on the motor shaft of the second drive motor (41). A first synchronous belt (44) is provided at the front end of the drive wheel (42) and the synchronous wheel (43). A second synchronous belt (45) is provided between the rear end of the synchronous wheel (43) and the mop wheel (31). The second synchronous belt (45) is sleeved on the outer peripheral wall of the mop wheel swing seat (32).

4. The sewing machine drag wheel device according to claim 1, characterized in that: The lifting and pressing part (5) includes a lifting and pressing wheel (52), a pressing rod (53), and a pressing rod connecting block (54). The lifting and pressing wheel (52) is eccentrically connected to the motor shaft of the first drive motor (51). The pressing rod (53) is provided with a pressing rod sleeve. The pressing rod (53) is located inside the pressing rod sleeve and extends downward through the pressing rod sleeve to connect with the pressing rod connecting block (54). The front end of the pressing rod sleeve is connected to the lifting and pressing wheel (52).

5. The sewing machine drag wheel device according to claim 4, characterized in that: The eccentricity angle between the lifting wheel (52) and the first drive motor (51) is 0°-15°.

6. The sewing machine drag wheel device according to claim 4, characterized in that: The pressure rod (53) is provided with a pressure spring (55) inside, and a pressure plate (56) is provided on the top of the pressure spring (55). An adjusting nut (57) is provided on the top of the pressure plate (56), and an adjusting screw (58) is provided on the top of the adjusting nut (57).

7. A sewing machine drag wheel device according to claim 6, characterized in that: The side wall of the pressure rod sleeve is provided with a pressure adjusting fixing seat (59), and the pressure adjusting nut (57) is disposed inside the pressure adjusting fixing seat (59).

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