Trimming presser foot lifting driving mechanism for flat seaming machine

Abstract

The utility model discloses a thread trimming and presser foot lifting driving mechanism for a flat seaming machine, which comprises a motor mounting seat mounted on the flat seaming machine and a driving motor used for driving a thread trimming mechanism, a thread loosening mechanism and a presser foot lifting mechanism, the driving motor is fixed above the motor mounting seat; and a power output shaft of the driving motor is connected with the cam in the cavity. A first guide rod is installed on the motor installation base, a first sliding block matched with the cam is arranged on the first guide rod, and the first sliding block is connected with the presser foot lifting mechanism. A second guide rod capable of sliding is mounted on the motor mounting seat, a second connecting block matched with the cam is fixed on the second guide rod, and the second connecting block is connected with the thread loosening mechanism. And one end of the second guide rod is connected with the thread trimming mechanism.

Description

Technical Field

[0001] The utility model relates to a stretch sewing machine, in particular to a thread trimming and presser foot lifting driving mechanism for the stretch sewing machine. Background Art

[0002] CN202011241764.1 discloses a thread trimming assembly, a thread loosening assembly and a presser foot lifting assembly of a stretch sewing machine, wherein a motor is mounted on a frame, and the motor has two driving ends, wherein one driving end drives the thread loosening assembly and the thread trimming assembly, and the other driving end drives the presser foot lifting assembly, wherein the thread loosening push rod, the presser foot lifting push rod and the thread trimming push rod are respectively independent, resulting in an extremely complex transmission structure, and all of them are exposed at the rear of the frame, posing a safety hazard. Summary of the invention

[0003] In view of the above-mentioned existing technical status, the utility model provides a thread trimming and presser foot lifting driving mechanism for a flat sewing machine, which reduces the installation space and improves the compactness of parts and the running stability.

[0004] The technical solution adopted by the utility model to solve the above-mentioned technical problems is as follows: a thread trimming and presser foot lifting driving mechanism for a stretch sewing machine, comprising a motor mounting seat installed on the stretch sewing machine and a driving motor for driving a thread trimming mechanism, a thread loosening mechanism and a presser foot lifting mechanism, the motor mounting seat having a cavity for installing a cam, the driving motor being fixed above the motor mounting seat, and the power output shaft of the driving motor being connected to the cam in the cavity. The motor mounting seat is provided with a first guide rod, the first guide rod is provided with a first slider cooperating with the cam, and the first slider is connected to the presser foot lifting mechanism. The motor mounting seat is provided with a second slidable guide rod, the second guide rod is fixed with a second connecting block cooperating with the cam, and the second connecting block is connected to the thread loosening mechanism. One end of the second guide rod is connected to the thread trimming mechanism.

[0005] In order to optimize the above technical solution, the utility model also includes the following improved technical solution.

[0006] The cam is fan-shaped, and the first slider and the second connecting block are distributed on both sides of the cam.

[0007] The first sliding block is provided with a first lug, and the first lug is provided with a first roller matched with the cam.

[0008] The first sliding block is provided with a second lug, which is rotatably connected to one end of the first connecting plate, and the other end of the first connecting plate is rotatably connected to a crank mounted on one side of the motor mounting seat.

[0009] A crank seat is fixed to the side wall of the above-mentioned motor mounting seat, and a rotatable crank shaft is arranged in the crank seat. One end of the crank shaft is connected to a first connecting handle rotatably connected to the first connecting plate, and the other end of the crank shaft is connected to a second connecting handle cooperating with the presser foot lifting rod.

[0010] The side wall of the motor mounting seat is fixed with a shaft sleeve, and the presser foot lifting rod is slidably installed in the shaft sleeve. The lower end of the presser foot lifting rod is connected to a second roller matched with a second connecting handle. The upper end of the presser foot lifting rod is connected to a third roller matched with a presser foot lifting driving handle.

[0011] A third connecting block is fixed to the end of the second guide rod, and the third connecting block is connected to the thread trimming control rod through a connecting pin.

[0012] The second guide rod is sleeved with a spring, one end of the spring is matched with the inner wall of the motor mounting seat, and the other end is matched with the second connecting block.

[0013] The second connecting block is connected with a fourth roller matched with the cam. A second connecting rod is fixed to the side wall of the second connecting block, and the second connecting rod is movably connected with the control rod of the loosening mechanism.

[0014] Compared with the prior art, the thread trimming and presser foot lifting driving mechanism for a flat sewing machine of the utility model can control the thread trimming, thread loosening and presser foot lifting actions through a driving motor, thereby reducing manufacturing costs and having the advantages of compact structure and stable control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure from another angle.

[0017] Figure 3 It is the assembly decomposition diagram of 2. Implementation

[0018] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.

[0019] Figures 1 to 3 Shown is a schematic structural diagram of the utility model.

[0020] The accompanying drawings are marked as follows: cam 1, drive motor 2, motor mounting seat 3, first guide rod 4, first slider 41, first lug 42, first roller 43, second lug 44, first connecting plate 45, second guide rod 5, second connecting block 51, third connecting block 52 connecting pin 53, thread trimming control rod 54, spring 55, fourth roller 56, second connecting rod 57, thread loosening mechanism control rod 58, crank seat 6, crank shaft 61, first connecting handle 62, second connecting handle 63, presser foot lifting rod 7, bushing 71, second roller 72, third roller 73, presser foot lifting driving handle 74.

[0021] The utility model discloses a thread trimming and presser foot lifting driving mechanism for a flat sewing machine, comprising a motor mounting seat 3 mounted on the flat sewing machine and a driving motor 2 for driving a thread trimming mechanism, a thread loosening mechanism and a presser foot lifting mechanism, wherein the motor mounting seat 3 has a cavity for mounting a cam 1, the driving motor 2 is fixed above the motor mounting seat 3, and a power output shaft of the driving motor 2 is connected to the cam 1 in the cavity; the motor mounting seat 3 is mounted with a first guide rod 4, the first guide rod 4 is provided with a first slider 41 matched with the cam 1, and the first slider 41 is connected to the presser foot lifting mechanism; the motor mounting seat 3 is mounted with a second slidable guide rod 5, the second guide rod 5 is fixed with a second connecting block 51 matched with the cam 1, and the second connecting block 51 is connected to the thread loosening mechanism; one end of the second guide rod 5 is connected to the thread trimming mechanism.

[0022] The cam 1 is fan-shaped, and the first slider 41 and the second connecting block 51 are distributed on both sides of the cam 1. The driving motor 2 can control the cam 1 to rotate to both sides, drive the first slider 41 to slide along the first guide rod 4, or drive the second connecting block 51 and the second guide rod 5 to slide axially.

[0023] The first slider 41 is provided with a first lug 42, on which a first roller 43 is provided to cooperate with the cam 1. The first slider 41 is provided with a second lug 44, which is rotatably connected to one end of a first connecting plate 45, and the other end of the first connecting plate 45 is rotatably connected to a crank mounted on one side of the motor mounting seat 3.

[0024] A crank seat 6 is fixed to the side wall of the motor mounting seat 3, and a rotatable crank shaft 61 is provided in the crank seat 6. One end of the crank shaft 61 is connected to a first connecting handle 62 rotatably connected to the first connecting plate 45, and the other end of the crank shaft 61 is connected to a second connecting handle 63 that cooperates with the presser foot lifting rod 7.

[0025] A shaft sleeve 71 is fixed to the side wall of the motor mounting seat 3, and the presser foot lifting rod 7 is slidably installed in the shaft sleeve 71; the lower end of the presser foot lifting rod 7 is connected to the second roller 72 that cooperates with the second connecting handle 63; the upper end of the presser foot lifting rod 7 is connected to the third roller 73 that cooperates with the presser foot lifting driving handle 74.

[0026] When the cam 1 turns to the first slider 41, the cam surface close to the first slider 41 squeezes the first roller 43, thereby driving the first slider 41 to slide. The first slider 41 drives the crank to rotate through the first connecting plate 45. During the rotation process, the second connecting handle 63 squeezes the second roller 72, so that the presser foot lifting rod 7 is lowered. The upper end of the presser foot lifting rod 7 drives the presser foot lifting driving handle 74 to rotate through the third roller 73, thereby lifting the presser foot. The presser foot lifting driving handle 74 has an upper and lower clamping plate, and the third roller 73 is located between the upper and lower clamping plates. The presser foot lifting rod 7 can drive the presser foot lifting driving handle 74 to move, and the presser foot lifting driving handle 74 can also drive the presser foot lifting rod 7 to reset.

[0027] A third connecting block 52 is fixed to the end of the second guide rod 5 , and the third connecting block 52 is connected to the thread trimming control rod 54 via a connecting pin 53 .

[0028] A spring 55 is sleeved on the second guide rod 5 , one end of the spring 55 matches with the inner wall of the motor mounting seat 3 , and the other end of the spring 55 matches with the second connecting block 51 .

[0029] The second connecting block 51 is connected with a fourth roller 56 cooperating with the cam 1 ; a second connecting rod 57 is fixed to the side wall of the second connecting block 51 , and the second connecting rod 57 is movably connected with a control rod 58 of the wire loosening mechanism.

[0030] When the cam 1 turns to the second connecting block 51, the cam surface close to the second connecting block 51 squeezes the fourth roller 56, and the second guide rod 5 moves axially, driving the thread trimming control rod 54 to move through the third connecting block 52 to achieve the thread trimming action. At the same time, the second connecting block 51 drives the second connecting rod 57 and the thread loosening mechanism control rod 58 to achieve the thread loosening action.

[0031] The best embodiment of the present invention has been explained, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A thread trimming and presser foot lifting driving mechanism for a flat sewing machine, comprising a motor mounting seat (3) mounted on the flat sewing machine and a driving motor (2) for driving a thread trimming mechanism, a thread loosening mechanism and a presser foot lifting mechanism, wherein: The motor mounting seat (3) has a cavity for mounting a cam (1); the drive motor (2) is fixed above the motor mounting seat (3); the power output shaft of the drive motor (2) is connected to the cam (1) in the cavity; the motor mounting seat (3) is installed with a first guide rod (4); the first guide rod (4) is provided with a first slider (41) cooperating with the cam (1); the first slider (41) is connected to a presser foot lifting mechanism; the motor mounting seat (3) is installed with a second guide rod (5) that can slide; the second guide rod (5) is fixed with a second connecting block (51) cooperating with the cam (1); the second connecting block (51) is connected to a thread loosening mechanism; one end of the second guide rod (5) is connected to a thread cutting mechanism.

2. The thread trimming and presser foot lifting driving mechanism according to claim 1 is characterized in that: The cam (1) is fan-shaped, and the first sliding block (41) and the second connecting block (51) are distributed on both sides of the cam (1).

3. The thread trimming and presser foot lifting driving mechanism according to claim 2 is characterized in that: The first sliding block (41) is provided with a first lug (42), and the first lug (42) is provided with a first roller (43) that cooperates with the cam (1).

4. The thread trimming and presser foot lifting driving mechanism according to claim 3 is characterized in that: The first slider (41) is provided with a second lug (44), the second lug (44) is rotatably connected to one end of a first connecting plate (45), and the other end of the first connecting plate (45) is rotatably connected to a crank mounted on one side of the motor mounting seat (3).

5. The thread trimming and presser foot lifting driving mechanism according to claim 4 is characterized in that: A crank seat (6) is fixed to the side wall of the motor mounting seat (3), a rotatable crank shaft (61) is arranged in the crank seat (6), one end of the crank shaft (61) is connected to a first connecting handle (62) rotatably connected to the first connecting plate (45), and the other end of the crank shaft (61) is connected to a second connecting handle (63) cooperating with the presser foot lifting rod (7).

6. The thread trimming and presser foot lifting driving mechanism according to claim 5 is characterized in that: A shaft sleeve (71) is fixed to the side wall of the motor mounting seat (3), and the presser foot lifting and lifting rod (7) is slidably mounted in the shaft sleeve (71); the lower end of the presser foot lifting and lifting rod (7) is connected to a second roller (72) that cooperates with the second connecting handle (63); the upper end of the presser foot lifting and lifting rod (7) is connected to a third roller (73) that cooperates with the presser foot lifting driving handle (74).

7. The thread trimming and presser foot lifting driving mechanism according to claim 1 is characterized in that: A third connecting block (52) is fixed to the end of the second guide rod (5), and the third connecting block (52) is connected to the thread trimming control rod (54) via a connecting pin (53).

8. The thread trimming and presser foot lifting driving mechanism according to claim 1 is characterized in that: The second guide rod (5) is sleeved with a spring (55), one end of the spring (55) matches with the inner wall of the motor mounting seat (3), and the other end matches with the second connecting block (51).

9. The thread trimming and presser foot lifting driving mechanism according to claim 8 is characterized in that: The second connecting block (51) is connected to a fourth roller (56) matched with the cam (1); a second connecting rod (57) is fixed to the side wall of the second connecting block (51), and the second connecting rod (57) is movably connected to the wire loosening mechanism control rod (58).

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