Cloth dragging wheel mechanism for sewing machine

Abstract

The cloth dragging wheel mechanism for the sewing machine comprises an installation plate, a cloth dragging wheel and a connecting rod mechanism, a driving shaft is arranged on the installation plate, the connecting rod mechanism comprises an output rod, a connecting rod and an executing rod which are sequentially connected, a transmission cam is fixedly arranged on the driving shaft, the output rod is rotationally connected with the transmission cam, and the executing rod is connected with the output rod. The mop device is characterized in that the connecting rod mechanism comprises a connecting node located between the output rod and the connecting rod, a control mechanism eccentrically arranged with the connecting node is arranged on the mounting plate, a driving rod rotationally connected with the connecting node is arranged on the control mechanism, and the driving rod is connected with the connecting node through a one-way bearing. The control mechanism can control the driving rod to rotate so as to change the position of the connecting node; and the control mechanism has a locking function. The problem that the length of a connecting rod of an existing cloth dragging wheel needs to be manually adjusted to meet the production requirement, and consequently the production efficiency is affected is solved.

Description

Technical Field

[0001] The utility model relates to the field of sewing machine accessories, and more specifically to a cloth-dragging wheel mechanism for a sewing machine. Background Art

[0002] Sewing machines are frequently used fabric processing equipment. During the fabric sewing process, especially when sewing larger fabrics, the length of the fabric output by the sewing machine is relatively long, which easily causes fabric accumulation on the sewing machine table, occupies the sewing machine workbench, and affects the operator's operating space; at the same time, during the sewing process, the operator is required to constantly manually feed the fabric output on the sewing machine workbench, which wastes a lot of time and energy.

[0003] For example, the existing Chinese patent with application number CN202223110489.7 discloses a mop wheel mechanism for a sewing machine, including a mounting frame, a drive unit, and a mop wheel. The drive unit is fixed on the mounting frame, and the mounting frame also includes a mop wheel lifting device. A mop wheel lifting rod runs through the mop wheel lifting device, and the mop wheel lifting rod is connected to a lifting bracket with a screw. The main shaft of the drive unit is connected to a lifting rotating rod and a transmission rod. The lifting rotating rod is hinged to a lifting connecting rod. The lifting connecting rod has a long waist hole. The sliding screw is located in the long waist hole and slides back and forth. The transmission rod is connected to a bidirectional joint bearing, and the other end has a transmission sub-rod, which is connected to the rotating shaft of the mop wheel.

[0004] The above-mentioned mop wheel mechanism for the sewing machine drives the mop wheel through a single servo motor to realize unidirectional rotation and lifting and holding control of the material. The structure is simple and easy to operate, and the overall multi-link articulated transmission is adopted, which is not easy to be damaged. However, the mop wheel needs to adjust the single mopping stroke of the mop wheel during actual use in order to cope with different products that need to be processed in actual production. The existing mop wheel needs to manually adjust the length of the connecting rod, which requires the staff to manually adjust the length of the connecting rod to meet the production requirements during the work process, which greatly reduces the production efficiency, and thus it is necessary to design a mop wheel mechanism that can automatically adjust the mopping stroke of the mop wheel. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a mopping wheel mechanism for a sewing machine, which solves the problem that the existing mopping wheel needs to manually adjust the length of the connecting rod to meet production requirements, thereby affecting production efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mopping wheel mechanism for a sewing machine, comprising a mounting plate, a mopping wheel and a connecting rod mechanism, a driving shaft is arranged on the mounting plate, the connecting rod mechanism comprises an output rod, a connecting rod and an actuating rod connected in sequence, a transmission cam is fixedly arranged on the driving shaft, the output rod is rotationally connected to the transmission cam, the actuating rod is connected to the mopping wheel through a one-way bearing, the connecting rod mechanism comprises a connecting node between the output rod and the connecting rod, a control mechanism eccentrically arranged with the connecting node is arranged on the mounting plate, a driving rod rotationally connected with the connecting node is arranged on the control mechanism, the control mechanism can control the rotation of the driving rod, and thus change the position of the connecting node; the control mechanism has a locking function.

[0007] The utility model is further configured as follows: the control mechanism includes a control shaft eccentrically arranged with the connection node, a control rod and a rotating shaft, the control shaft adjusts the swing of the rotating shaft through the control rod, and the connection node swings around the rotating shaft as the center through the driving rod.

[0008] The utility model is further configured as follows: a mop wheel lifting device is arranged on the mounting plate, the lifting device is fixedly connected to the mop wheel, a lifting cam controlled by a one-way bearing is arranged on the driving shaft, a lifting rod is rotatably arranged on the mounting plate, the lifting rod is hinged to the mop wheel lifting device, the lifting rod is against the lifting cam, and a driving device is fixedly arranged on the driving shaft.

[0009] The utility model is further configured as follows: the lifting rod is rotatably provided with a contact wheel protruding outward, and the contact wheel abuts against the lifting cam.

[0010] The utility model is further configured as follows: the driving device is configured as a bidirectional motor.

[0011] The utility model is further configured as follows: a servo motor is fixedly arranged on the control shaft.

[0012] The utility model is further configured as follows: a stud bolt is arranged on the actuating rod, nuts are arranged at both ends of the stud bolt, and the overall length of the actuating rod can be adjusted by rotating the nuts and the stud bolt.

[0013] In summary, the utility model has the following beneficial effects:

[0014] 1. Compared with the prior art, the utility model adopts a driving motor to drive a connecting rod mechanism to realize the rotation of the mop wheel, which avoids the frequent starting and stopping of the driving motor, thereby extending its service life and reducing the failure rate. The mop wheel is also provided with a control motor to control the stroke of the mop wheel, and allows the staff to quickly control the control motor to adjust the stroke through a button, which saves adjustment time, simplifies the control requirements, makes the overall work smoother, and increases work efficiency.

[0015] 2. The utility model is also provided with a control motor and a control mechanism, and the control mechanism is hinged with the driving connecting rod mechanism, so that the control motor can drive the control connecting rod mechanism to change the motion trajectory of the driving connecting rod, thereby realizing the control of the number of circles of a single rotation of the mop wheel to change the single mopping stroke of the mop wheel. This arrangement makes it possible to change the single feeding stroke of the mop wheel not only by relying on the driving motor rotation signal to control, thereby making the control of changing the feeding stroke more stable, and also convenient for assembly and later disassembly, replacement, maintenance and other operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 2 is a schematic diagram of the three-dimensional structure of the mop wheel mechanism of this embodiment;

[0017] Figure 2 This is a schematic diagram of the structure of the mop wheel in the embodiment when it is in a stationary state with a small stroke;

[0018] Figure 3 This is a schematic diagram of the structure of the mop wheel in the embodiment when it is in a small stroke motion state;

[0019] Figure 4 This is a schematic diagram of the structure of the mop wheel in the present embodiment when it is in a stationary state with a large stroke;

[0020] Figure 5 This is a schematic diagram of the structure of the mop wheel in the embodiment when it is in a large-stroke motion state;

[0021] Figure 6 This is a structural schematic diagram of the mop wheel in this embodiment in a pressed down state;

[0022] Figure 7 is a structural schematic diagram of the mop wheel in the embodiment in a raised state;

[0023] Figure numerals: 1. mounting plate; 2. mop wheel; 3. connecting rod mechanism; 301. output rod; 302. connecting rod; 303. actuator rod; 4. drive shaft; 5. transmission cam; 6. connection node; 7. control mechanism; 701. control shaft; 702. control rod; 703. rotating shaft; 8. mop wheel lifting device; 9. lifting cam; 10. lifting rod; 11. drive rod; 12. drive device; 13. contact wheel; 14. stud bolt; 15. nut. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] This embodiment discloses a mopping wheel mechanism for a sewing machine. Figure 1-7 As shown, it includes a mounting plate 1, a mop wheel 2 and a connecting rod mechanism 3. A driving shaft 4 is arranged on the mounting plate 1. The connecting rod mechanism 3 includes an output rod 301, a connecting rod 302 and an executive rod 303 which are connected in sequence. A transmission cam 5 is fixedly arranged on the driving shaft 4. The output rod 301 is rotatably connected to the transmission cam 5. The executive rod 303 is connected to the mop wheel 2 through a one-way bearing. The rotation of the mop wheel 2 is controlled by the one-way bearing. When the executive shaft rotates in the clockwise direction, the up and down swing of the executive rod 303 of the connecting rod mechanism 3 can be used as the power for the intermittent rotation of the mop wheel 2, thereby realizing the intermittent movement of the mop wheel 2 by controlling the unidirectional rotation of the motor. The connecting rod mechanism 3 includes a connecting rod 302 and an output rod 301. The connection node 6 between the rod 301 and the connecting rod 302, the mounting plate 1 is provided with a control mechanism 7 eccentrically arranged with the connection node 6, the control mechanism 7 is provided with a driving rod 11 rotatably connected with the connection node 6, the control mechanism 7 can control the driving rod 11 to rotate, thereby changing the position of the connection node 6, and the position of the connection node 6 is changed by the control mechanism 7, so that the motion trajectory of the entire connecting rod mechanism 3 can be changed, thereby changing the motion range of the execution rod 303, thereby changing the single mopping stroke of the mopping wheel 2; the control mechanism 7 has a locking function, and the control mechanism 7 needs to be locked at the current position after the adjustment is completed, so as to achieve the effect of changing the position of the connection node 6. The mopping wheel 2 adopts the connecting rod mechanism 3 to drive the rotation of the mopping wheel 2, and further provides the control mechanism 7 at the connection node 6 of the connecting rod mechanism 3, so as to adjust the position of the connection node 6 through the control mechanism 7, change the up and down swing amplitude of the execution axis of the connecting rod mechanism 3, and achieve the change of the single mopping stroke of the mopping wheel 2.

[0026] The utility model further provides a control mechanism 7 including a control shaft 701 eccentrically arranged with the connection node 6, a control rod 702 and a rotary shaft 703. The control shaft 701 adjusts the swing of the rotary shaft 703 through the control rod 702, and the connection node 6 swings around the rotary shaft 703 through the driving rod 11. Since the connection node 6 swings around the rotary shaft 703, the control shaft 701 changes the position of the rotary shaft 703 by controlling the control rod 702, thereby changing the position of the connection node 6, so that the motion trajectory of the connecting rod mechanism 3 is changed, thereby realizing the change of the single mopping stroke adjustment of the mopping wheel 2.

[0027] The utility model further provides a mop wheel lifting device 8 on the mounting plate 1, the mop wheel lifting device 8 is fixedly connected to the mop wheel 2, a lifting cam 9 controlled by a one-way bearing is provided on the driving shaft 4, when the driving shaft 4 rotates counterclockwise, the one-way bearing will be in a stuck state, and then the lifting cam 9 can be driven to rotate, a lifting rod 10 is rotatably provided on the mounting plate 1, the lifting rod 10 is hinged with the mop wheel lifting device 8, the lifting rod 10 abuts against the lifting cam 9, and a driving device 12 is fixedly provided on the driving shaft 4. The utility model further provides a lifting rod 10 rotatably provided with a contact wheel 13 protruding outward, and the contact wheel 13 abuts against the lifting cam 9. The mop wheel lifting device 8 provided can realize the lifting of the mop wheel 2, because the one-way bearing is provided to control the rotation of the lifting cam 9, so that when the driving shaft 4 rotates counterclockwise, the lifting cam 9 will drive the contact wheel 13 on the lifting rod 10 to move upward, thereby realizing the lifting of the mop wheel 2.

[0028] The utility model further configures the driving device 12 to be a bidirectional motor, and a servo motor is fixedly arranged on the control shaft 701. Since the driving shaft 4 needs to be able to complete clockwise and counterclockwise rotation, a bidirectional motor needs to be selected, and the control shaft 701 needs to be locked at the current position after completing the rotation, so as to achieve the purpose of adjusting the mopping stroke of the mopping wheel 2, and then use the servo motor for control.

[0029] The utility model further provides a stud bolt 14 on the actuator rod 303, and nuts 15 are provided at both ends of the stud bolt 14, and the overall length of the actuator rod 303 can be adjusted by rotating the nut 15 and the stud bolt 14. This arrangement can make the overall installation more convenient, and the length of the actuator rod 303 can be adjusted according to actual production needs.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A mopping wheel mechanism for a sewing machine, comprising a mounting plate (1), a mopping wheel (2) and a connecting rod mechanism (3), wherein a driving shaft (4) is arranged on the mounting plate (1), the connecting rod mechanism (3) comprises an output rod (301), a connecting rod (302) and an actuator rod (303) which are connected in sequence, a transmission cam (5) is fixedly arranged on the driving shaft (4), the output rod (301) is rotatably connected to the transmission cam (5), and the actuator rod (303) is connected to the mopping wheel (2) via a one-way bearing, characterized in that: The connecting rod mechanism (3) comprises a connecting node (6) located between an output rod (301) and a connecting rod (302); a control mechanism (7) eccentrically arranged with the connecting node (6) is arranged on the mounting plate (1); a driving rod (11) rotatably connected with the connecting node (6) is arranged on the control mechanism (7); the control mechanism (7) can control the driving rod (11) to rotate, thereby changing the position of the connecting node (6); and the control mechanism (7) has a locking function.

2. The mopping wheel mechanism for a sewing machine according to claim 1, characterized in that: The control mechanism (7) comprises a control shaft (701) eccentrically arranged with respect to the connection node (6), a control rod (702) and a rotating shaft (703); the control shaft (701) adjusts the swing of the rotating shaft (703) through the control rod (702); and the connection node (6) swings around the rotating shaft (703) through the driving rod (11).

3. The mopping wheel mechanism for a sewing machine according to claim 1, characterized in that: The mounting plate (1) is provided with a mop wheel lifting device (8), the mop wheel lifting device (8) is fixedly connected to the mop wheel (2), the drive shaft (4) is provided with a lifting cam (9) controlled by a one-way bearing, the mounting plate (1) is rotatably provided with a lifting rod (10), the lifting rod (10) is hinged to the mop wheel lifting device (8), the lifting rod (10) and the lifting cam (9) are in contact with each other, and the drive shaft (4) is fixedly provided with a driving device (12).

4. The mopping wheel mechanism for a sewing machine according to claim 3, characterized in that: The lifting rod (10) is rotatably provided with a contact wheel (13) protruding outward, and the contact wheel (13) abuts against the lifting cam (9).

5. The mopping wheel mechanism for a sewing machine according to claim 3, characterized in that: The driving device (12) is configured as a bidirectional motor.

6. The mopping wheel mechanism for a sewing machine according to claim 2, characterized in that: A servo motor is fixedly arranged on the control shaft (701).

7. The mopping wheel mechanism for a sewing machine according to claim 2, characterized in that: The actuator rod (303) is provided with a stud bolt (14), and nuts (15) are provided at both ends of the stud bolt (14). The overall length of the actuator rod (303) can be adjusted by rotating the nuts (15) and the stud bolt (14).

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