Multi-functional driving device and sewing machine

Abstract

The utility model belongs to sewing equipment technical field, especially point to a kind of multifunctional drive device and sewing machine;Multifunctional cam, presser foot lifting cam and thread trimming cam are provided on rotary output end, multifunctional cam includes tooth height adjustment driving section, tooth lower arch driving section, presser foot lifting cam working section, thread trimming cam working section;Presser foot lifting cam has presser foot lifting driving section and presser foot lifting base circle section;Thread trimming cam has thread trimming driving section and thread trimming base circle section;Presser foot lifting driving section is set corresponding to presser foot lifting cam working section, thread trimming driving section is set corresponding to thread trimming cam working section;Rotary output end drives cam mechanism rotation, respectively realize thread trimming, presser foot lifting, tooth height adjustment and tooth lower arch without interfering each other;The utility model drives multifunctional cam rotation by rotary drive source, reaches the purpose of automatic adjustment tooth height, solves the technical problem that professional technical personnel needs to manually adjust tooth height to machine in prior art.

Description

Technical fields:

[0001] This utility model belongs to the field of sewing equipment technology, specifically referring to a multi-functional drive device and sewing machine. Background technology:

[0002] Sewing machines are core production equipment in the garment manufacturing industry, and their performance directly affects the efficiency and quality of garment production. In recent years, market demands have changed rapidly, and the garment industry has gradually shown a new trend of "small orders, quick response," meaning small production batches that must be able to respond quickly to market demands. This trend forces garment factories to frequently change the fabrics used for sewing during the production process, and these fabrics vary in thickness and material. Therefore, when changing the sewing fabric, the height of the feed dog must be adjusted. Only in this way can the stable feeding effect be guaranteed, effectively preventing problems such as skipped stitches, thread breaks, fabric wrinkling, and uneven feeding.

[0003] Currently, adjusting the feed dog height is generally done manually, requiring maintenance personnel to operate the relevant parts of the sewing machine. Although maintenance personnel possess professional skills and can accurately perform the adjustment, in actual production scenarios, garment factories have a limited number of maintenance personnel, while the number of sewing machines on the production line is enormous.

[0004] When frequent adjustments to the feed dog height are needed to accommodate different fabrics, maintenance personnel are often unable to arrive on-site in time, forcing the machine to stop and wait, thus prolonging downtime and severely impacting production efficiency. In addition, manual adjustment suffers from a series of problems, including cumbersome procedures, low efficiency, and susceptibility to human error that can affect sewing quality. Summary of the Invention:

[0005] The purpose of this invention is to provide a multifunctional drive device and sewing machine that can automatically adjust the height of teeth to reduce reliance on workers.

[0006] This utility model is implemented as follows:

[0007] One objective of this utility model is to provide a multifunctional drive device, comprising:

[0008] A rotary drive source having a rotary output terminal;

[0009] A cam mechanism includes a multi-functional cam, a pressure foot lifting cam, and a wire-cutting cam disposed on the rotary output end. The multi-functional cam includes a tooth height adjustment drive section and a tooth lower arch drive section arranged circumferentially. A pressure foot lifting cam working section and a wire-cutting cam working section are respectively disposed on both sides of the tooth height adjustment drive section. The pressure foot lifting cam has a pressure foot lifting drive section and a pressure foot lifting base circle section. The wire-cutting cam has a wire-cutting drive section and a wire-cutting base circle section.

[0010] The multi-functional cam is connected to the tooth feeding mechanism via a tooth height adjustment transmission mechanism.

[0011] The lifting foot cam is connected to the pressing foot mechanism via a lifting foot transmission mechanism.

[0012] The wire-cutting cam is connected to the wire-cutting mechanism via a wire-cutting transmission mechanism;

[0013] The pressure foot lifting drive section is set in the working area of ​​the pressure foot lifting cam, and the wire cutting drive section is set in the working area of ​​the wire cutting cam;

[0014] The rotating output end drives the cam mechanism to rotate, which respectively realizes wire cutting, lifting the presser foot, adjusting the tooth height, and lowering the tooth without interfering with each other.

[0015] In the aforementioned multifunctional drive device, the tooth height adjustment drive section, in a counterclockwise direction, sequentially represents the factory tooth height, the second tooth height, the third tooth height, the fourth tooth height, and the fifth tooth height, with different distances from the cam surface to the cam center corresponding to different tooth heights.

[0016] In the aforementioned multifunctional drive device, the tooth height adjustment transmission mechanism includes a first connecting rod with one end rotatably connected to the end face of the rotary drive source or the mounting plate of the rotary drive source, and the other end of the first connecting rod is connected to the tooth adjustment eccentric shaft of the tooth feeding mechanism through a second connecting rod and a first crank.

[0017] In the aforementioned multifunctional drive device, the first connecting rod is connected to the end face of the rotary drive source or the rotating mechanism of the rotary drive source mounting plate via a shaft screw, and a first reset torsion spring for driving the first connecting rod to reset is provided on the shaft screw.

[0018] In the aforementioned multifunctional drive device, the presser foot lifting transmission mechanism includes a presser foot lifting lever and a presser foot lifting crank. A rolling element is provided at one end of the presser foot lifting lever, and the rolling element abuts against the cam surface of the presser foot lifting cam. The other end of the presser foot lifting lever is fitted onto the presser foot shaft of the presser foot mechanism and rotates relative to the presser foot shaft. The presser foot lifting crank is fixed on the presser foot shaft, and the presser foot lifting crank and the other end of the presser foot lifting lever abut against each other to drive the presser foot lifting shaft to rotate in one direction.

[0019] In the aforementioned multifunctional drive device, the wire cutting transmission mechanism includes a first drive lever and a second drive lever rotatably mounted on the housing. The first drive lever is in contact with the outer cam surface of the wire cutting cam. One end of the second drive lever is located below the first drive lever, and the other end is connected to one end of the wire cutting shaft of the wire cutting mechanism via a third connecting rod and a second crank.

[0020] In the aforementioned multifunctional drive device, one end of the second drive lever is provided with a ball head, the bottom surface of the first drive lever has an arc-shaped surface, and the ball head is located below the arc-shaped surface.

[0021] Another objective of this invention is to provide a sewing machine that includes the aforementioned multi-functional drive device.

[0022] The outstanding advantages of this utility model compared to the prior art are:

[0023] This invention uses a rotary drive source to rotate a multi-functional cam. The tooth height adjustment drive section on the multi-functional cam drives the tooth height adjustment transmission mechanism and the feed tooth mechanism to achieve automatic tooth height adjustment. This solves the technical problem in existing technologies where professional technicians are required to manually adjust the tooth height, reducing reliance on maintenance personnel on the processing site and improving the operational efficiency of garment factories. Furthermore, this invention can also perform thread cutting, presser foot lifting, and lower tooth arching actions using the same rotary drive source 1, further improving production efficiency and reducing production costs for enterprises. Attached image description:

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the multifunctional cam of this utility model;

[0026] Figure 3 This is a schematic diagram of the presser foot of this utility model when it is lifted;

[0027] Figure 4 This is a schematic diagram of the wire cutting process of this utility model;

[0028] Figure 5 This is a schematic diagram illustrating the adjustment of tooth height according to this utility model;

[0029] Figure 6 This is a schematic diagram of the teeth arching downwards according to this utility model.

[0030] In the diagram: 1. Rotary drive source; 2. Rotary output end; 3. Multifunctional cam; 4. Presser foot lifting cam; 5. Wire cutting cam; 6. Tooth height adjustment drive section; 6a. Factory tooth height; 6b. Second tooth height; 6c. Third tooth height; 6d. Fourth tooth height; 6e. Fifth tooth height; 7. Tooth lower arch drive section; 8. Presser foot lifting cam working section; 9. Wire cutting cam working section; 10. Presser foot lifting drive section; 11. Presser foot base circle section; 12. Wire cutting drive section; 13. Wire cutting base circle section; 14. Tooth height adjustment... 15. Feeding dog mechanism; 16. Presser foot lifting transmission mechanism; 17. Presser foot mechanism; 18. Thread cutting transmission mechanism; 19. Thread cutting mechanism; 20. Rotary drive source mounting plate; 21. First connecting rod; 22. Second connecting rod; 23. First crank; 24. Tooth adjusting eccentric shaft; 25. First return torsion spring; 26. Presser foot lifting lever; 27. Presser foot lifting crank; 28. Rolling element; 29. ​​Presser foot shaft; 30. First drive lever; 31. Second drive lever; 32. Third connecting rod; 33. Second crank; 34. Thread cutting shaft; 35. Ball head. Detailed implementation method:

[0031] The present invention will be further described below with reference to specific embodiments.

[0032] Example 1: See Figure 1-6 :

[0033] This embodiment provides a multi-functional drive device applied to a sewing machine to drive thread cutting, presser foot lifting, tooth height adjustment, and tooth downward arching actions. It mainly includes a rotary drive source 1 and a cam mechanism. The rotary drive source 1 has a rotary output end 2. In this embodiment, the rotary drive source 1 is preferably a motor, and the corresponding rotary output end 2 is the motor's shaft. Furthermore, the cam mechanism of this embodiment includes a multi-functional cam 3, a presser foot lifting cam 4, and a thread cutting cam 5 disposed on the rotary output end 2. The multi-functional cam 3 includes a tooth height adjustment drive section 6 and a tooth downward arching drive section 7 arranged circumferentially. A presser foot lifting cam working area section 8 and a thread cutting cam working area section 9 are respectively disposed on both sides of the tooth height adjustment drive section 6. The presser foot lifting cam 4 has a presser foot lifting drive section 10 and a presser foot base circle section 11. The thread cutting cam 5 has a thread cutting drive section 12 and a thread cutting base circle section 13. The multi-functional cam 3 drives the tooth... The height adjustment transmission mechanism 14 is connected to the feed dog mechanism 15; the presser foot lifting cam 4 is connected to the presser foot mechanism 17 via the presser foot lifting transmission mechanism 16; the thread cutting cam 5 is connected to the thread cutting mechanism 19 via the thread cutting transmission mechanism 18; the presser foot lifting drive section 10 is set corresponding to the presser foot lifting cam working section 8, and the thread cutting drive section 12 is set corresponding to the thread cutting cam working section 9; the rotary drive source 1 drives the rotary output end 2 to rotate, thereby rotating the cam mechanism, and realizing thread cutting, presser foot lifting, tooth height adjustment, and tooth downward arching respectively without interference.

[0034] This invention uses a rotary drive source 1 to drive a multi-functional cam 3 to rotate. The tooth height adjustment drive section 6 on the multi-functional cam 3 drives the tooth height adjustment transmission mechanism and the feed tooth mechanism 15 to automatically adjust the tooth height. This solves the technical problem in the prior art that requires professional technicians to manually adjust the tooth height of the machine, reducing the reliance on maintenance personnel on the processing site and improving the operating efficiency of garment factories. In addition, this invention can also realize the execution of thread cutting, presser foot lifting, and lower tooth arching actions through the same rotary drive source 1, further improving production efficiency and reducing the production cost of enterprises.

[0035] like Figure 2 As shown, further, the tooth height adjustment drive section 6, rotating counterclockwise, sequentially provides the factory tooth height 6a, the second tooth height 6b, the third tooth height 6c, the fourth tooth height 6d, and the fifth tooth height 6e. The distance from the cam surface to the cam center differs for each tooth height. However, the distance from the cam surface to the cam center is the same for the same tooth height. Generally, the angle for each tooth height setting is 15°.

[0036] It should be noted that, as Figure 1 and Figure 5As shown, the tooth height adjustment transmission mechanism includes a first connecting rod 21, one end of which is rotatably connected to the end face of the rotary drive source 1 or the rotary drive source mounting plate 20. The other end of the first connecting rod 21 is connected to the tooth adjustment eccentric shaft 24 of the tooth feeding mechanism 15 via a second connecting rod 22 and a first crank 23. The rotary drive source 1 is mounted to the housing via the rotary drive source mounting plate 20.

[0037] To ensure timely reset of the first connecting rod 21, the first connecting rod 21 is connected to the end face of the rotary drive source 1 or the rotating mechanism of the rotary drive source mounting plate 20 via a shaft screw. A first reset torsion spring 25 for driving the first connecting rod 21 to reset is provided on the shaft screw. One end of the first reset torsion spring 25 is mounted on the housing, and the other end is connected to the first connecting rod 21.

[0038] In addition, such as Figure 1 , Figure 3 and Figure 6 As shown, the presser foot lifting transmission mechanism 16 in this embodiment includes a presser foot lifting lever 26 and a presser foot lifting crank 27. A rolling element 28 is provided at one end of the presser foot lifting lever 26, and the rolling element 28 abuts against the cam surface of the presser foot lifting cam 4. In this embodiment, the rolling element 28 is a bearing, but a roller can also be used. The other end of the presser foot lifting lever 26 is fitted onto the presser foot shaft 29 of the presser foot mechanism 17 and rotates relative to the presser foot shaft 29. The presser foot lifting crank 27 is fixed to the presser foot shaft 29, and the presser foot lifting crank 27 abuts against the other end of the presser foot lifting lever 26 to drive the presser foot shaft 29 to rotate in one direction. This structure only interacts with the presser foot lifting crank 27 when the presser foot lifting cam 4 drives the presser foot lifting lever 26 to rotate downward around the presser foot shaft 29, thereby lifting the presser foot.

[0039] At the same time, such as Figure 1 , Figure 4 As shown, the wire cutting transmission mechanism 18 includes a first drive lever 30 and a second drive lever 31 rotatably mounted on the housing. The first drive lever 30 is in contact with the outer cam surface of the wire cutting cam 5. One end of the second drive lever 31 is located below the first drive lever 30, and the other end is connected to one end of the wire cutting shaft 34 of the wire cutting mechanism 19 through a third connecting rod 32 and a second crank 33.

[0040] Furthermore, one end of the second drive lever 31 is provided with a ball head 35, and the bottom surface of the first drive lever 30 has an arc-shaped surface, with the ball head 35 located below the arc-shaped surface.

[0041] The working principle of this utility model:

[0042] When the rotary drive source 1 rotates clockwise, the wire-cutting cam 5 drives the wire-cutting transmission mechanism 18, which in turn drives the wire-cutting mechanism 19 to perform wire cutting. At this time, the rolling element 28 rolls on the lifting foot base circle 11 of the lifting foot cam 4, and the lifting foot mechanism 17 does not perform the lifting foot action. The wire-cutting cam working section 9 on the multi-functional cam 3 acts on the first connecting rod 21, and the tooth height adjustment transmission mechanism 14 does not operate.

[0043] The rotary drive source 1 rotates counterclockwise, and its rotation within the tooth height adjustment drive section 6 of the multi-functional cam 3 enables tooth height adjustment. When the tooth height adjustment drive section 6 is in contact with the first connecting rod 21 at different positions, it drives the tooth height adjustment transmission mechanism 14 to adjust the required tooth height. At this time, the rolling element 28 rolls on the lifting foot base circle section 11 of the lifting foot cam 4, and the lifting foot mechanism 17 does not perform the lifting foot action. The wire cutting base circle section 12 of the wire cutting cam 5 acts on the first drive lever 30, and the wire cutting mechanism 17 does not perform the wire cutting action.

[0044] The rotary drive source 1 continues to rotate counterclockwise, and the rolling element 28 rolls in the lifting pressure foot drive section 10 of the lifting pressure foot cam 4. The lifting pressure foot cam 4 drives the pressure foot transmission mechanism 16 to drive the pressure foot mechanism 17 to lift the pressure foot. During the lifting of the pressure foot, when the multi-functional cam 3 rotates to the tooth lowering drive section 7 to drive the first connecting rod 21 to move downward, it drives the tooth height adjustment transmission mechanism 14 to move, thereby causing the feed tooth mechanism 15 to move downward to achieve the tooth lowering function. The wire cutting base circle section 12 of the wire cutting cam 5 acts on the first drive lever 30, and the wire cutting mechanism 17 does not perform the wire cutting action.

[0045] Example 2:

[0046] This embodiment provides a sewing machine that includes the multi-functional drive device described above.

[0047] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-functional drive device, characterized in that: include: A rotary drive source (1) having a rotary output end (2); The cam mechanism includes a multi-functional cam (3), a pressure foot lifting cam (4), and a wire-cutting cam (5) disposed on the rotary output end (2). The multi-functional cam (3) includes a tooth height adjustment drive section (6) and a tooth lower arch drive section (8) disposed circumferentially. A pressure foot lifting cam working section (9) and a wire-cutting cam working section (10) are respectively disposed on both sides of the tooth height adjustment drive section (6). The pressure foot lifting cam (4) has a pressure foot lifting drive section (10) and a pressure foot base circle section (11). The wire-cutting cam (5) has a wire-cutting drive section (12) and a wire-cutting base circle section (13). The multi-functional cam (3) is connected to the tooth feeding mechanism (15) via a tooth height adjustment transmission mechanism (14); The lifting foot cam (4) is connected to the pressing foot mechanism (17) via the lifting foot transmission mechanism (16); The wire-cutting cam (5) is connected to the wire-cutting mechanism (19) via the wire-cutting transmission mechanism (18); The lifting foot drive section (10) is set in the working area section (9) of the lifting foot cam, and the wire cutting drive section (12) is set in the working area section (10) of the wire cutting cam; The rotating output end (2) drives the cam mechanism to rotate, thereby realizing wire cutting, lifting the presser foot, adjusting the tooth height, and lowering the tooth without interfering with each other.

2. The multifunctional drive device according to claim 1, characterized in that: The tooth height adjustment drive section (6) is arranged in a counterclockwise direction as follows: factory tooth height (6a), second tooth height (6b), third tooth height (6c), fourth tooth height (6d) and fifth tooth height (6e). The distance from the cam surface to the cam center is different for each tooth height.

3. A multifunctional drive device according to claim 1 or 2, characterized in that: The tooth height adjustment transmission mechanism (14) includes a first connecting rod (21) with one end rotatably connected to the end face of the rotary drive source (1) or the rotary drive source mounting plate (20), and the other end of the first connecting rod (21) is connected to the tooth adjustment eccentric shaft (24) of the tooth feeding mechanism (15) through a second connecting rod (22) and a first crank (23).

4. A multifunctional drive device according to claim 3, characterized in that: The first connecting rod (21) is connected to the end face of the rotary drive source (1) or the rotating mechanism of the rotary drive source mounting plate (20) by a shaft screw, and a first reset torsion spring (25) is provided on the shaft screw to drive the first connecting rod (21) to reset.

5. A multifunctional drive device according to claim 1 or 2, characterized in that: The presser foot lifting transmission mechanism (16) includes a presser foot lifting lever (26) and a presser foot lifting crank (27). A rolling element (28) is provided at one end of the presser foot lifting lever (26), and the rolling element (28) abuts against the cam surface of the presser foot lifting cam (4). The other end of the presser foot lifting lever (26) is fitted on the presser foot shaft (29) of the presser foot mechanism (17) and rotates relative to the presser foot shaft (29). The presser foot lifting crank (27) is fixed on the presser foot shaft (29). The presser foot lifting crank (27) and the other end of the presser foot lifting lever (26) abut against each other to drive the presser foot shaft (29) to rotate in one direction.

6. A multifunctional drive device according to claim 1 or 2, characterized in that: The wire cutting transmission mechanism (18) includes a first drive lever (30) and a second drive lever (31) rotatably mounted on the housing. The first drive lever (30) is in contact with the outer cam surface of the wire cutting cam (5). One end of the second drive lever (31) is located below the first drive lever (30), and the other end is connected to one end of the wire cutting shaft (34) of the wire cutting mechanism (19) through a third connecting rod (32) and a second crank (33).

7. A multifunctional drive device according to claim 6, characterized in that: One end of the second drive lever (31) is provided with a ball head (35), and the bottom surface of the first drive lever (30) has an arc-shaped surface, with the ball head (35) located below the arc-shaped surface.

8. A sewing machine, characterized in that: Includes the multifunctional drive device as described in any one of claims 1-7.

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