CN217809974U

CN217809974U - Driving mechanism of splicing and sewing machine

Info

Publication number: CN217809974U
Application number: CN202221578509.0U
Authority: CN
Inventors: 谢少保
Original assignee: Zhejiang Sewpower Automation Technology Co ltd
Current assignee: Zhejiang Sewpower Automation Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-15
Anticipated expiration: 2032-06-22

Abstract

The utility model provides an actuating mechanism of seam splicing machine belongs to sewing machine technical field. The driving mechanism solves the problems that the existing driving mechanism is high in cost and large in required installation space. The driving mechanism of the splicing and sewing machine comprises a first cam arranged in a machine shell and a driving piece connected to the machine shell and provided with a rotating shaft, wherein the rotating shaft on the first cam is provided with a connecting hole, the rotating shaft of the driving piece penetrates through the connecting hole, the hole wall of the connecting hole is radially provided with screw holes with two through ends, the screw holes are in threaded connection with positioning screws, the inner ends of the positioning screws are abutted to the outer peripheral wall of the rotating shaft, the first cam can be driven to swing and drive a chopper in a chopper assembly to move downwards to cut strips when the driving piece rotates forwards, a second cam is sleeved on the rotating shaft of the driving piece, the second cam can be driven to swing and drive a presser bar in the presser bar assembly to lift when the driving piece rotates backwards, and an adjusting structure which enables the circumferential position of the second cam relative to the rotating shaft to be adjusted is connected to the second cam. The driving mechanism has the advantages of long service life and high stability.

Description

Driving mechanism of splicing and sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a actuating mechanism of piece machine is related to.

Background

The seam splicing machine can be used for seams and common decorative seams, and can also be used for decorative design by making single lines into rope stitches to increase the aesthetic property of clothing products. The existing seam splicing machine is generally provided with a presser foot lifting assembly, a thread clamping device assembly and a chopper assembly, wherein the presser foot lifting assembly is used for lifting and putting down a presser foot, and the thread clamping device assembly is used for realizing thread loosening action during paying off. In addition, when the strip is pasted on the seam splicing machine, after one-time sewing, the strip cutting and resetting of the chopping knife are realized through the up-and-down movement of the chopping knife in the chopping knife assembly.

The presser foot lifting assembly of the existing sewing machine comprises a first electromagnet installed at the tail of a machine head, and parts such as a rotating shaft, a connecting rod and a presser foot rod which are arranged in the machine head, wherein the first electromagnet is connected with the presser foot rod through the parts such as the rotating shaft and the connecting rod, and the presser foot rod is lifted through the first electromagnet. The chopping knife assembly comprises a second electromagnet arranged at the head of the machine head, and the second electromagnet stretches to realize the up-and-down movement of the chopping knife and the slitting and resetting of the chopping knife. Meanwhile, the thread clamping device assembly needs to be loosened when the thread is paid off, and the thread loosening of the thread clamping device assembly is realized through a third electromagnet in the existing splicing sewing machine.

The existing splicing and sewing machine needs to be provided with a plurality of drivers in order to lift a presser bar, cut a chopper into strips and loosen a thread clamp, is high in cost, occupies a large installation space due to the arrangement of the drivers and related parts, makes the structure of the splicing and sewing machine complex, and also has the problem of inconvenience in installation of other parts.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided an actuating mechanism of piece machine, the utility model aims to solve the problem that current actuating mechanism is with high costs, required installation space is big, guarantee the chopper subassembly simultaneously and lift the operation precision of presser foot subassembly.

The purpose of the utility model can be realized by the following technical proposal: a driving mechanism of a seam splicing machine comprises a machine shell, wherein a presser foot lifting assembly with a presser foot rod and a chopper assembly with a chopper are arranged on the machine shell, and the seam splicing machine is characterized by comprising a first cam and a driving piece, wherein the first cam is arranged in the machine shell, the driving piece is connected to the machine shell and is provided with a rotating shaft, the rotating shaft of the driving piece is arranged in the connecting hole in a penetrating mode, a screw hole with two through ends is formed in the hole wall of the connecting hole in the radial direction of the connecting hole, a positioning screw is connected in the screw hole in a threaded mode, the inner end of the positioning screw abuts against the outer peripheral wall of the rotating shaft, the first cam can be driven to swing and drive the chopper in the chopper assembly to move downwards to cut strips when the driving piece rotates forwards, a second cam is sleeved on the rotating shaft of the driving piece, the second cam can be driven to swing and drive the presser foot rod in the presser foot lifting assembly to lift when the driving piece rotates backwards, and an adjusting structure, and enabling the circumferential position of the second cam to be adjusted relative to the rotating shaft, is connected to the adjusting structure.

In the driving mechanism, the first cam and the second cam are sleeved on the rotating shaft of the driving piece, and then the forward rotation and the reverse rotation of the driving piece are utilized to respectively drive the chopping knife in the chopping knife assembly to cut strips and lift the presser bar in the presser bar assembly, so that only one driving piece needs to be arranged to cut the strips and lift the presser bar, the cost of the driving structure is reduced, and meanwhile, the installation space can be reduced.

Meanwhile, the pressure foot lifting assembly and the chopping knife assembly have higher installation accuracy requirements and stroke control requirements, and after the driving piece is installed, the driving accuracy of the parts respectively responsible for the cam I and the cam II needs to be well coordinated and the required position accuracy needs to be realized. Therefore, the connecting hole is formed in the first cam, the screw holes with two through ends are formed in the hole wall of the connecting hole along the radial direction of the connecting hole, during installation, the rotating shaft of the driving piece penetrates through the connecting hole firstly, the positioning screw penetrates through the screw hole and abuts against the rotating shaft to achieve installation and fixation of the first cam, the position of the first cam can be adjusted by unscrewing the positioning screw during installation and equipment debugging, the position accuracy of the first cam is high, and the operation accuracy of the chopper assembly is guaranteed. Similarly, the second cam is connected with an adjusting structure which enables the circumferential position of the second cam relative to the rotating shaft to be adjusted, so that the position accuracy of the second cam can be adjusted to be higher, and the operation accuracy of the presser foot lifting assembly is further ensured.

In the above driving mechanism of the sewing machine, the driving member is a stepping motor. The stepping motor is also called a pulse motor, and is a control motor which is controlled by an electric pulse signal and converts the electric pulse signal into corresponding angular displacement. The stepping motor can very accurately control the running speed and the running position, has long service life and high stability, can ensure that a chopper assembly, a presser foot lifting assembly and a wire clamp assembly of the splicing machine keep higher running precision for a long time, and improves the working performance and the reliability of the splicing machine.

In the above-mentioned actuating mechanism of splicing machine, cam one and cam two are pasted and are leaned on, adjust the structure and include seting up a plurality of spiro union holes on a cam side, each spiro union hole sets up around the connecting hole, be equipped with a plurality of on the cam two and the spiro union hole just right curved regulation hole that is one by one, wear to be equipped with the adjusting screw with the spiro union hole spiro union of corresponding in the regulation hole respectively. And the second cam can tightly abut against the first cam to realize locking by screwing the adjusting screw. After each adjusting screw is unscrewed, the angle position of the second cam can be adjusted, so that the second cam achieves higher installation accuracy, and the pressure foot lifting assembly and the wire clamping assembly controlled by the second cam are further guaranteed to have higher operation accuracy.

In the above driving mechanism of the splicing and sewing machine, the number of the adjusting holes is three, and the three adjusting holes are distributed at equal intervals around the connecting hole. The design of a plurality of adjusting screws ensures that two stress points of the cam are more, and then the cam can be stably connected and fixed on the first cam.

In the driving mechanism of the splicing and sewing machine, the casing is provided with the inspection window positioned on the upper sides of the first cam and the second cam, and the upper cover of the inspection window is provided with the dustproof cover.

Set up the inspection window on the casing, also can adjust the position of cam one and cam two through opening the inspection window after making things convenient for whole piece sewing machine part to all install, and then guarantee the position accuracy of cam one and cam two.

In the driving mechanism of the splicing and sewing machine, the number of the screw holes on the first cam is two, each screw hole is connected with one positioning screw, the two screw holes are respectively positioned at the top and the side of the first cam, and the driving piece rotates forwards and drives the first cam to swing, so that the screw holes positioned at the side face the inspection window. The first cam is connected with the rotating shaft through the two positioning screws, and the mounting stability of the first cam can be improved. The driving piece drives the first cam to swing, so that the two screw holes can move to positions opposite to the inspection window, and the position of the first cam is conveniently adjusted.

In the above driving mechanism of the seam splicing machine, the presser foot lifting assembly comprises a presser foot rotating shaft which is rotatably connected to the casing and a swinging piece which is fixedly sleeved on the presser foot rotating shaft, a pushing surface is arranged on the outer peripheral wall of the cam II, a connecting piece I is arranged on the swinging piece, a linkage head is connected to the connecting piece I, the linkage head is abutted against the pushing surface, a pressing lifting convex block is fixedly connected to the presser foot rod, one end of the presser foot rotating shaft is connected with a lifting piece, the lifting piece is provided with a swinging part which is positioned below the pressing lifting convex block, and when the presser foot rotating shaft rotates, the swinging part of the lifting piece can swing upwards and drive the pressing lifting convex block to move upwards. When the driving piece drives the cam II to rotate, the swinging piece and the presser foot rotating shaft are driven to rotate by means of the matching of the pushing surface and the linkage head, and at the moment, because one end of the presser foot rotating shaft is connected with the lifting piece, the swinging part of the lifting piece swings upwards and drives the lifting pressing convex block to move upwards by means of the rotation of the presser foot rotating shaft, and then the presser foot rod is driven to lift.

In the actuating mechanism of foretell seam welder, still be equipped with the thread tension device subassembly on the casing, still have connection piece two on the swinging piece, the connection piece is two to the slope extend and with connection piece dislocation set, the thread tension device subassembly includes connecting rod, thread release lever, rotates the piece, the one end and the connection piece looks articulated of connecting rod, the other end and the rotation piece of connecting rod are articulated mutually, the one end and the rotation piece of thread release lever link firmly mutually, the connecting rod moves can drive the thread release lever through rotating and rotates and make the thread tension device subassembly carry out the thread release. When the rotating shaft of the driving piece rotates reversely, the swinging piece is driven to swing, so that the connecting rod moves backwards and downwards, then the rotating piece rotates to drive the thread releasing rod to rotate, and the thread releasing of the thread clamping device assembly is realized. In the actual manufacturing process, a reset spring is further arranged to realize the reset of the wire releasing rod, so that the wire clamping assembly realizes wire clamping.

In the driving mechanism of the seam splicing machine, the connecting sheet I and the connecting sheet II are integrally formed, and the presser foot rotating shaft is rotatably connected to the machine shell through the shaft sleeve. The swinging piece is connected with the linkage head and the connecting rod in the wire clamping assembly through the connecting sheet I and the connecting sheet II, so that the components can be conveniently installed and adjusted, and the installation accuracy of the corresponding components is improved.

Compared with the prior art, the driving mechanism of the splicing and sewing machine has the following advantages:

1. the driving piece is a stepping motor, the stepping motor can very accurately control the running speed and the running position, the service life is long, and the stability is high, so that the chopping knife assembly, the presser foot lifting assembly and the wire clamp assembly of the splicing machine can be ensured to keep higher running precision for a long time, and the working performance and the reliability of the splicing machine are improved.

2. In the driving mechanism, the cam I and the cam II are sleeved on the rotating shaft of the driving part, and then the forward rotation and the reverse rotation of the driving part are utilized to respectively drive the chopping knife in the chopping knife assembly to cut strips and lift the presser bar in the presser bar assembly, so that the strip cutting and the presser bar lifting action are carried out only by arranging one driving part, the cost of the driving structure is reduced, and meanwhile, the installation space can be reduced.

Drawings

FIG. 1 is a schematic perspective view of a splicing and sewing machine.

Fig. 2 is a schematic perspective view of the present drive mechanism.

Fig. 3 is a partial configuration diagram of the present drive mechanism.

Fig. 4 is a schematic view of the connection of the driving member, the first cam and the second cam.

Fig. 5 is an exploded view of the driver, cam one and cam two.

FIG. 6 is a schematic diagram of the connection of the driving member, the first cam and the second cam according to the second embodiment.

In the figure, 1, a housing; 1a, an inspection window; 1b, a dust cover; 2. lifting the presser foot assembly; 21. A presser bar; 22. a presser foot spindle; 23. a swinging member; 231. connecting a first connecting sheet; 232. a second connecting sheet; 24. a linkage head; 25. lifting and pressing the bump; 26. a lifting member; 261. a swing portion; 3. a chopper assembly; 31. a chopper; 32. a cutter frame; 4. a first cam; 41. connecting holes; 42. screw holes; 43. screwing holes; 5. a drive member; 51. a rotating shaft; 6. a set screw; 7. a second cam; 71. an adjustment hole; 72. pushing a surface; 8. an adjusting screw; 9. a wire gripper assembly; 91. a connecting rod; 92. a thread releasing rod; 93. a rotating member; 10. a nut; 11. a shaft sleeve; 12. the head is pushed.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 and 2, the seam splicing machine includes a casing 1, a presser foot lifting assembly 2 and a chopper assembly 3 are arranged on the casing 1, the driving mechanism includes a first cam 4 arranged in the casing 1 and a driving member 5 connected to the casing 1 and having a rotating shaft 51, and the driving member 5 is a stepping motor. The rotating shaft 51 provided with the connecting hole 41 and the driving part 5 on the first cam 4 is arranged in the connecting hole 41 in a penetrating mode, the hole wall of the connecting hole 41 is provided with a screw hole 42 with two through ends along the radial direction of the connecting hole 41, and the inner end, in which the positioning screw 6 is screwed, of the screw hole 42 abuts against the outer peripheral wall of the rotating shaft 51. The first cam 4 is provided with a pushing head 12, the chopper assembly 3 comprises a knife unfolding frame connected to the machine shell 1 in a sliding mode along the vertical direction and a knife unfolding connected to the lower end of the knife unfolding frame, and the driving piece 5 can drive the first cam 4 to swing when rotating forwards, so that the pushing head 12 moves downwards and pushes the chopper frame 32 to move downwards, and the chopper 31 moves downwards to cut strips. The rotating shaft 51 of the driving piece 5 is sleeved with a second cam 7, the first cam 4 is attached to the second cam 7, the second cam 7 can be driven to swing and drive the presser foot rod 21 in the presser foot lifting assembly 2 to lift when the driving piece 5 rotates reversely, and the second cam 7 is connected with an adjusting structure which can adjust the circumferential position of the second cam 7 relative to the rotating shaft 51.

Specifically, as shown in fig. 3, 4 and 5, the adjusting structure includes three screw holes 43 formed in the side surface of the first cam 4, and the three adjusting holes 71 are arranged at equal intervals around the connecting hole 41. The second cam 7 is provided with a plurality of arc-shaped adjusting holes 71 which are opposite to the screw holes 43 one by one, and adjusting screws 8 which are in screw connection with the corresponding screw holes 43 are respectively arranged in the adjusting holes 71 in a penetrating manner. By tightening the adjusting screw 8, the second cam 7 can be tightly abutted against the first cam 4 to realize locking. After each adjusting screw 8 is unscrewed, the angle position of the second cam 7 can be adjusted, so that the second cam 7 achieves higher installation accuracy, and the pressure foot lifting assembly 2 and the wire clamping assembly 9 controlled by the second cam 7 are further ensured to have higher operation accuracy. In the actual manufacturing process, the screw holes 43 and the adjusting holes 71 can be increased or decreased as appropriate, such as two, four or five.

As shown in fig. 1 and fig. 2, in order to facilitate adjustment, overhaul and maintenance, an inspection window 1a located on the upper side of the first cam 4 and the second cam 7 is opened on the casing 1, and a dust cover 1b is covered on the inspection window 1a. Referring to fig. 4 and 5, the number of the screw holes 42 on the first cam 4 is two, a positioning screw 6 is connected in each screw hole 42, the two screw holes 42 are respectively located at the top and the side of the first cam 4, and the driving member 5 rotates forward and drives the first cam 4 to swing, so that the screw holes 42 located at the side face the inspection window 1a. The connection between the cam-one 4 and the rotating shaft 51 is realized through two positioning screws 6, so that the stability of the installation of the cam-one 4 can be improved. The driving piece 5 drives the first cam 4 to swing, so that the two screw holes 42 can move to the position opposite to the inspection window 1a, and the position of the first cam 4 can be adjusted conveniently.

As shown in fig. 2, the presser foot lifting assembly 2 includes a presser foot rotating shaft 22 rotatably connected to the machine shell 1, and a swinging member 23 fixedly sleeved on the presser foot rotating shaft 22, the outer peripheral wall of the cam second 7 has a pushing surface 72, the swinging member 23 has a connecting piece first 231, the connecting piece first 231 is connected with a linkage head 24, the linkage head 24 abuts against the pushing surface 72, the presser foot lever 21 is fixedly connected with a lifting convex block 25, one end of the presser foot rotating shaft 22 is connected with a lifting member 26, the lifting member 26 has a swinging portion 261 located below the lifting convex block 25, and when the presser foot rotating shaft 22 rotates, the swinging portion 261 of the lifting member 26 can swing upwards to drive the lifting convex block 25 to move upwards. When the driving element 5 drives the second cam 7 to rotate, the pushing surface 72 is matched with the linkage head 24 to drive the swinging element 23 and the presser foot rotating shaft 22 to rotate, and at this time, because one end of the presser foot rotating shaft 22 is connected with the lifting element 26, the rotation of the presser foot rotating shaft 22 enables the swinging part 261 of the lifting element 26 to swing upwards and drive the lifting convex block 25 to move upwards, so as to drive the presser bar 21 to lift.

As shown in fig. 2, a thread clamping assembly 9 is further arranged on the machine shell 1, a connecting piece two 232 is further arranged on the swinging piece 23, the connecting piece one 231 and the connecting piece two 232 are integrally formed, the presser foot rotating shaft 22 is rotatably connected to the machine shell 1 through a shaft sleeve 11, the connecting piece two 232 extends in an upward inclined mode and is arranged in a staggered mode with the connecting piece one 231, the thread clamping assembly 9 comprises a connecting rod 91, a thread releasing rod 92 and a rotating piece 93, one end of the connecting rod 91 is hinged to the connecting piece two 232, the other end of the connecting rod 91 is hinged to the rotating piece 93, one end of the thread releasing rod 92 is fixedly connected with the rotating piece 93, and the connecting rod 91 can move to drive the thread releasing rod 92 to rotate through the rotating piece 93 so that the thread clamping assembly 9 can release threads. When the rotating shaft 51 of the driving member 5 rotates reversely, the swinging member 23 is driven to swing, so that the connecting rod 91 moves backwards and downwards, and then the rotating member 93 rotates to drive the thread releasing rod 92 to rotate, thereby releasing the thread of the thread clamping assembly 9. In the actual manufacturing process, a return spring is further arranged to realize the return of the wire releasing rod 92, so that the wire clamping assembly 9 realizes wire clamping.

In the driving mechanism, the first cam 4 and the second cam 7 are sleeved on the rotating shaft 51 of the driving part 5, and then the forward rotation and the reverse rotation of the driving part 5 are utilized to respectively drive the chopping knife 31 in the chopping knife assembly 3 to cut strips and lift the presser foot rod 21 in the presser foot assembly 2, so that only one driving part 5 is needed to cut the strips and lift the presser foot, the driving structure cost is reduced, and meanwhile, the installation space can be reduced.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that, as shown in fig. 6, the following scheme can be adopted instead of the adjustment structure: the adjusting structure comprises a nut 10, wherein an external thread is arranged on a rotating shaft 51 of a driving piece 5, the rotating shaft 51 of the driving piece 5 sequentially penetrates through a first cam 4 and a second cam 7 and then is connected with the nut 10, and after the nut 10 is screwed down, the second cam 7 can be locked on the first cam 4 only. Preferably, a non-smooth friction surface is arranged between the first cam 4 and the second cam 7, so that the friction resistance between the two is increased.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, a housing is used more herein; 1a, an inspection window; 1b, a dust cover; 2. lifting the presser foot assembly; 21. a presser bar; 22. a presser foot shaft; 23. a swinging member; 231. connecting a first connecting sheet; 232. connecting a second connecting sheet; 24. a linkage head; 25. lifting and pressing the bump; 26. a lifting member; 261. a swing portion; 3. a chopper assembly; 31. a chopper; 32. a cutter frame; 4. a first cam; 41. connecting holes; 42. screw holes; 43. screwing holes; 5. a drive member; 51. a rotating shaft; 6. a set screw; 7. a second cam; 71. an adjustment hole; 72. pushing a surface; 8. an adjusting screw; 9. a wire gripper assembly; 91. a connecting rod; 92. a thread releasing rod; 93. a rotating member; 10. A nut; 11. a shaft sleeve; 12. first order terms are used but not exclusive of the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any one of the additional limitations of the present invention.

Claims

1. A driving mechanism of a seam splicing machine comprises a machine shell (1), wherein a presser foot lifting assembly (2) with a presser foot rod (21) and a chopping knife assembly (3) with a chopping knife (31) are arranged on the machine shell (1), the driving mechanism is characterized by comprising a first cam (4) arranged in the machine shell (1) and a driving piece (5) connected to the machine shell (1) and provided with a rotating shaft (51), a connecting hole (41) is formed in the first cam (4), the rotating shaft (51) of the driving piece (5) penetrates through the connecting hole (41), a screw hole (42) with two through ends is formed in the hole wall of the connecting hole (41) along the radial direction of the connecting hole (41), a positioning screw (6) is screwed in the screw hole (42), the inner end of the positioning screw (6) abuts against the outer peripheral wall of the rotating shaft (51), the driving piece (5) can drive the first cam (4) to swing and drive the chopping knife (31) in the chopping knife assembly (3) to move downwards to perform cutting, the cutting strip, the rotating shaft (5) is sleeved with a second cam (7), and the position of the rotating shaft (7) can be adjusted when the rotating shaft (7) swings, the rotating shaft (7) rotates reversely, and the cam (7) is adjusted, and the pressing rod (7) is connected with the cam (7), and the cam (7) to drive the cam assembly (7) to perform upward swing, and the cam (7) to perform the forward rotation adjusting mechanism, and the forward rotation adjusting mechanism can drive the forward rotation adjusting assembly (7) and the forward rotation adjusting mechanism can drive the forward rotation of the cam (7) to perform the forward rotation mechanism And (5) forming.

2. The drive mechanism of a patchwork machine according to claim 1, wherein the drive member (5) is a stepper motor.

3. The driving mechanism of the splicing and sewing machine according to claim 1, wherein the first cam (4) and the second cam (7) are attached to each other, the adjusting structure comprises a plurality of screwing holes (43) formed in the side surface of the first cam (4), each screwing hole (43) is arranged around the connecting hole (41), a plurality of arc-shaped adjusting holes (71) which are opposite to the screwing holes (43) one by one are formed in the second cam (7), and adjusting screws (8) which are screwed with the corresponding screwing holes (43) are respectively arranged in the adjusting holes (71) in a penetrating manner.

4. The driving mechanism of the splicing and sewing machine according to claim 1, wherein the first cam (4) and the second cam (7) are attached to each other, the adjusting structure comprises a nut (10), an external thread is arranged on a rotating shaft (51) of the driving member (5), and the rotating shaft (51) of the driving member (5) sequentially penetrates through the first cam (4) and the second cam (7) and then is connected with the nut (10).

5. The driving mechanism of the sewing machine according to claim 3, wherein the number of the adjusting holes (71) is three, and the three adjusting holes (71) are arranged around the connecting hole (41) at equal intervals.

6. The driving mechanism of the sewing machine according to any one of claims 1 to 5, characterized in that the casing (1) is provided with an inspection window (1 a) located at the upper side of the first cam (4) and the second cam (7), and the inspection window (1 a) is covered with a dust cover (1 b).

7. The driving mechanism of the sewing machine according to claim 6, wherein the number of the screw holes (42) on the first cam (4) is two, each screw hole (42) is connected with one of the set screws (6), the two screw holes (42) are respectively located at the top and the side of the first cam (4), and the driving member (5) rotates forward and drives the screw holes (42) located at the side to face the inspection window (1 a) after the first cam (4) swings.

8. The driving mechanism of the sewing machine according to any one of claims 1 to 5, characterized in that the presser foot lifting assembly (2) comprises a presser foot rotating shaft (22) rotatably connected to the machine shell (1), and a swinging member (23) fixedly sleeved on the presser foot rotating shaft (22), the outer peripheral wall of the cam (7) is provided with a pushing surface (72), the swinging member (23) is provided with a connecting piece (231), the connecting piece (231) is connected with a linkage head (24), the linkage head (24) abuts against the pushing surface (72), the presser foot rod (21) is fixedly connected with a lifting lug (25), one end of the presser foot rotating shaft (22) is connected with a lifting member (26), the lifting member (26) is provided with a swinging part (261) positioned below the lifting lug (25), and the swinging part (261) of the lifting member (26) can swing upwards to drive the lifting lug (25) to move upwards when the presser foot rotating shaft (22) rotates.

9. The driving mechanism of the splicing and sewing machine according to claim 8, wherein a thread clamping assembly (9) is further arranged on the machine shell (1), a connecting piece II (232) is further arranged on the swinging piece (23), the connecting piece II (232) extends in an upward inclined mode and is arranged in a staggered mode with the connecting piece I (231), the thread clamping assembly (9) comprises a connecting rod (91), a thread releasing rod (92) and a rotating piece (93), one end of the connecting rod (91) is hinged to the connecting piece II (232), the other end of the connecting rod (91) is hinged to the rotating piece (93), one end of the thread releasing rod (92) is fixedly connected with the rotating piece (93), and the connecting rod (91) can move to drive the thread releasing rod (92) to rotate through the rotating piece (93) so that the thread clamping assembly (9) can release threads.

10. The driving mechanism of a sewing machine according to claim 8, wherein the first connecting piece (231) and the second connecting piece (232) are integrally formed, and the presser foot rotating shaft (22) is rotatably connected to the casing (1) through a shaft sleeve (11).