A structure and sewing machine for controlling multiple sewing actions by one motor

Abstract

The present application is a structure and a sewing machine that uses a single motor to control multiple sewing actions, specifically relating to the technical field of sewing machine manufacturing, including a motor, a presser foot lifting mechanism, a reverse stitch mechanism, and a thread trimming mechanism. The motor includes an electromagnet and an encoder, and the motor has a front output shaft and a rear output shaft. The rear output shaft of the motor controls the presser foot lifting mechanism and the reverse stitch mechanism. The rear output shaft of the motor passes through the electromagnet and is fixed with a presser foot lifting cam, a transmission wheel, and a reverse stitch crank. The front output shaft of the motor controls the thread trimming mechanism. The front output shaft of the motor passes through the encoder and is fixed with a thread cutting drive crank. The present application is configured to use a single motor to achieve the sewing actions of reverse stitching, presser foot lifting, and thread trimming. The rear output shaft and the front output shaft of the motor are cleverly used to control the presser foot lifting, reverse stitching, and thread trimming actions, making the sewing machine structure more compact and significantly reducing the production cost of the sewing machine.

Description

Technical Field

[0001] The present application provides a structure and a sewing machine in which a motor controls multiple sewing actions, and specifically relates to the technical field of sewing machine manufacturing. Background Art

[0002] Existing sewing machines typically use electromagnets to control sewing operations such as reverse stitching, presser foot, and thread trimming. Each function requires a separate electromagnet or motor. Currently, there are new models on the market that use stepper motors to control the presser foot, thread trimming, and reverse stitching (stitch adjustment). One stepper motor controls the thread trimming and presser foot lifter by rotating forward and reverse, respectively, while the other motor controls reverse stitching (stitch adjustment). This type of sewing machine requires two stepper motors to control reverse stitching, presser foot, and thread trimming, increasing manufacturing costs and making production and assembly more complex. Summary of the Invention

[0003] In response to the defects of high cost and complex production in the above-mentioned sewing machine technology, the present application proposes a structure and a sewing machine that controls multiple sewing actions by one motor, which is characterized by comprising a motor, a presser foot lifting mechanism, a reverse stitching mechanism and a thread trimming mechanism, the motor including an electromagnet and an encoder, the motor having a front output shaft and a rear output shaft, the rear output shaft of the motor controlling the presser foot lifting mechanism and the reverse stitching mechanism, the rear output shaft of the motor passing through the electromagnet and being fixed with a transmission wheel, the front output shaft of the motor controlling the thread trimming mechanism, the electromagnet having a sliding pin connected as one body, the presser foot lifting mechanism comprising a presser foot lifting cam and a presser foot lifting connecting rod, the presser foot lifting cam having a connecting rod groove, a front low point, a rear low point and a sliding pin groove, the presser foot lifting connecting rod having a circular head in contact with the presser foot lifting cam, the circular head of the presser foot lifting connecting rod having a matching connecting rod groove in the presser foot lifting cam, and the motor achieving the presser foot lifting action by one forward and reverse rotation within the turning angle.

[0004] The reverse stitching mechanism includes a reverse stitching crank, which has a connecting oblique arm and a sliding pin groove. The connecting oblique arm is connected to a fixed part at an eccentric position of the reverse stitching crank. The motor repeatedly swings forward and reverse within the rotation angle to perform reverse stitching. The transmission wheel also has a sliding pin groove. The sliding pin is located on the sliding pin groove of the presser foot lifting cam, the transmission wheel and the reverse stitching crank.

[0005] The thread trimming mechanism includes a tangent driving crank and a tangent crank rod, the tangent crank rod also has a crank ball, the tangent driving crank has a crank hole, the crank ball is installed in the crank hole of the tangent driving crank, the front output shaft of the motor passes through the encoder and is fixed with the tangent crank rod, and the motor of the thread trimming mechanism realizes the thread trimming action by running forward once within the rotation angle.

[0006] Furthermore, the electromagnet is mounted on a rear end cover of the motor, the encoder is mounted on a front end cover of the motor, and the motor further includes a relay.

[0007] Furthermore, the sliding pin has a rear shaft hole and a fixed plate, the sliding pin is connected to the fixed plate, and the center position of the fixed plate is provided with a rear shaft hole for the rear shaft to pass through.

[0008] Furthermore, the reverse sewing mechanism includes a swing seat and a feed shaft, the reverse sewing crank also has a fixed part and a sliding pin groove, the connecting oblique arm connecting the fixed part and the reverse sewing crank is arranged at an eccentric position of the reverse sewing crank, the fixed part is connected to the reverse sewing connecting rod, and the transmission wheel also has a rear shaft hole for the rear shaft to pass through, and the reverse sewing connecting rod drives the swing seat to swing to realize the swinging operation of the feed shaft.

[0009] Furthermore, the presser foot lifting cam, reverse stitch crank and transmission wheel have the same sliding pin groove. When the motor is not started, the sliding pin is located in the sliding pin groove of the transmission wheel. Under the attraction of the electromagnet, the sliding pin disengages the presser foot lifting cam or the reverse stitch crank.

[0010] Furthermore, the motor of the thread trimming mechanism is reversed once within the rotation angle to achieve the thread trimming action.

[0011] Furthermore, during the reverse sewing action and the presser foot lifting action, the electromagnet is in an original state, and the sliding pin is in the sliding pin groove of the transmission wheel.

[0012] Furthermore, the tangent crank arm also has a connecting body and a forward shaft hole, and the tangent drive crank also has a mounting port, a fixing frame and a connecting rod fixing hole. The connecting body connects the crank ball and the forward shaft hole, and the mounting port of the tangent drive crank is for the crank ball to be placed in the connecting body. The connecting body is connected to the fixing frame, the fixing frame and the connecting rod fixing hole, and the fixing frame is provided with a connecting rod fixing hole, and the connecting rod fixing hole is connected to the fixed connecting rod.

[0013] Furthermore, the thread trimming mechanism also includes a connecting rod, a blade and two thread trimming arms, one end of the connecting rod is connected to the thread cutting drive crank, and the other end of the connecting rod is connected to the two thread trimming arms, the fixed thread trimming arm fixes the knife seat, and the connecting rod drives the thread trimming arm to push the blade.

[0014] Furthermore, a solution can be added to the presser foot lifting cam, wherein the presser foot lifting cam also has a connecting rod groove and a rear shaft hole, the presser foot lifting cam is integrated with the electromagnet, the connecting rod groove of the presser foot lifting cam is open, and there is a gap between the presser foot lifting cam and the rear shaft, the presser foot lifting connecting rod has a circular head that contacts the presser foot lifting cam, and the motor realizes the presser foot lifting action by rotating forward and reverse once within the turning angle, and the circular head of the presser foot lifting connecting rod has a matching connecting rod groove, a front low point and a rear low point against the operating space in the presser foot lifting cam.

[0015] A sewing machine of the present application includes a structure in which a plurality of sewing actions are controlled by one motor.

[0016] The beneficial effect of the structure and sewing machine of the present application in which multiple sewing actions are controlled by one motor is that the sewing actions of reverse stitching, presser foot lifting and thread trimming are realized by the setting of one motor operation, and the rear output shaft and front output shaft of the motor are cleverly used to control the presser foot lifting, reverse stitching and thread trimming actions, so that the structure of the sewing machine is more compact, the design of the sewing machine is more reasonable, and the production cost of the sewing machine is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structure of a sewing machine in which one motor controls multiple sewing actions and a structure diagram of a sewing machine;

[0018] Figure 2 This is a schematic diagram of a structure in which one motor controls multiple sewing actions, a presser foot lifting mechanism, and a reverse stitching mechanism of a sewing machine;

[0019] Figure 3 This is a schematic diagram of a structure in which one motor controls multiple sewing actions and a thread trimming mechanism of a sewing machine;

[0020] Figure 4 This is a diagram of a structure in which a motor controls multiple sewing actions and a transmission wheel structure of a sewing machine;

[0021] Figure 5 This is a diagram of a structure in which a motor controls multiple sewing actions and a sewing machine presser foot lifting cam structure;

[0022] Figure 6 This is a diagram of a structure in which one motor controls multiple sewing actions and a reverse stitch crank structure of a sewing machine;

[0023] Figure 7 This is a diagram of a structure in which one motor controls multiple sewing actions and a sliding pin structure of a sewing machine;

[0024] Figure 8 This is a diagram of a structure in which one motor controls multiple sewing actions and a sewing machine tangent drive crank structure;

[0025] Figure 9 This is a diagram of a structure in which one motor controls multiple sewing actions and a tangent crank arm structure of a sewing machine;

[0026] Figure 10 This is a structural diagram of a structure in which a motor controls multiple sewing actions and a presser foot lifting mechanism of a second embodiment of a sewing machine of the present application;

[0027] Figure 11 This is a diagram of a structure in which one motor controls multiple sewing actions and a presser foot lifting cam structure of a second embodiment of a sewing machine of the present application.

[0028] Reference numerals: 1. Motor; 11. Electromagnet; 12. Front shaft; 13. Rear shaft; 130. Rear shaft hole; 14. Encoder; 111. Sliding pin; 112. Sliding pin slot; 113. Fixed plate; 2. Presser foot lifting mechanism; 21. Presser foot lifting cam; 212. Connecting rod slot; 213. Front low point; 214. Rear low point; 22. Presser foot lifting connecting rod; 23. Needle bar; 3. Reverse stitching mechanism; 31. Reverse stitching crank; 311. Connecting oblique arm; 312. Fixed portion; 32. Reverse stitching connecting rod Rod; 33. Swing seat; 34. Feed shaft; 4. Drive wheel; 5. Thread trimming mechanism; 51. Thread tangent crank rod; 512. Connector; 513. Crank ball; 514. Front shaft hole; 52. Thread tangent drive crank; 521. Crank hole; 522. Mounting port; 523. Fixing bracket; 524. Connecting rod fixing hole; 53. Connecting rod; 54. Thread trimming arm; 55. Blade; 6. Presser foot lifting cam; 611. Connecting rod slot; 612. Front low point; 613. Rear low point; 614. Rear shaft hole. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application.

[0030] Example 1

[0031] Figure 1 Figure 2 Figure 3The present application is a structure in which a motor controls multiple sewing actions and a sewing machine structure diagram. The structure in which a motor controls multiple sewing actions specifically includes a motor 1, a presser foot lifting mechanism 2, a reverse stitching mechanism 3 and a thread trimming mechanism 5. The motor 1 includes an electromagnet 11 and / or a relay (the present application also uses a relay in the scheme in which the electromagnet 11 is used, and the effect is the same) and an encoder 14. The motor 1 has a front output shaft 12 and a rear output shaft 13. The rear output shaft 13 of the motor 1 controls the presser foot lifting mechanism 2 and the reverse stitching mechanism 3. The rear output shaft 13 of the motor 1 passes through the electromagnet 11 and is fixed with a transmission wheel 4; the front output shaft 12 of the motor 1 controls the thread trimming mechanism 5, and the front output shaft 12 of the motor 1 passes through the encoder 14 and is fixed with a tangent curved rod 51.

[0032] exist Figure 1 Figure 2 In the figure, the presser foot lifting mechanism 2 includes a presser foot lifting cam 21, a presser foot lifting connecting rod 22 and a needle bar 23; the reverse stitching mechanism 3 includes a reverse stitching crank 31, a reverse stitching connecting rod 32, a swing seat 33 and a feed shaft 34.

[0033] The electromagnet 11 of the above-mentioned motor 1 is mounted on the rear end cover of the motor 1, and the rear output shaft 13 of the motor 1 passes through the electromagnet 11. The electromagnet 11 is used to clutch the presser foot lifting cam 21 or the reverse stitch crank 31 by utilizing the action of the transmission wheel 4; the encoder 14 of the motor 1 is mounted on the front end cover of the motor 1, and the front output shaft 12 of the motor 1 passes through the encoder 14 and then fixes the tangent crank rod 51. The encoder 14 reads the operating status of the front output shaft 12 in order to input relevant control data into the command motor 1. As another embodiment, a relay is used to replace the electromagnet 11 to achieve the same technical effect. The relay is also mounted on the rear end cover of the motor 1.

[0034] In the accompanying drawings, the rear shaft 13 passes through the electromagnet 11 and then through the fixedly connected presser foot lifting cam 21, the transmission wheel 4, and the reverse stitch crank 31. The electromagnet 11 has a sliding pin 111 connected as an integral body. The sliding pin 111 has a rear shaft hole 130 and a fixed plate 113. The sliding pin 111 is connected to the fixed plate 113. The center of the fixed plate 113 is provided with a rear shaft hole 130 for the rear shaft 13 to pass through. The above-mentioned presser foot lifting cam 21 has a connecting rod groove 212, a front low point 213, a rear low point 214, a rear shaft hole 130 and a sliding pin groove 112; the above-mentioned reverse stitch crank 31 has a connecting oblique arm 311, a fixed part 312, a rear shaft hole 130 and a sliding pin groove 112, and the connecting oblique arm 311 connecting the fixed part 312 and the reverse stitch crank 31 is arranged at an eccentric position of the reverse stitch crank 31, and the above-mentioned fixed part 312 is connected to the reverse stitch connecting rod 32, that is, the connecting oblique arm 311 is connected to the fixed part 312 by the eccentric position of the reverse stitch crank 31; the above-mentioned transmission wheel 4 has a rear shaft hole 130 and a sliding pin groove 112, and the rear shaft hole 130 is for the rear shaft 13 to pass through. The sliding pin 111 is on the sliding pin groove 112 of the presser foot lifting cam 21, the transmission wheel 4 and the reverse stitch crank 31. The rear output shaft 13 passes through the rear output shaft hole 130 of the presser foot lifting cam 21, the transmission wheel 4 and the reverse stitch crank 31. The presser foot lifting cam 21, the reverse stitch crank 31 and the transmission wheel 4 have the same sliding pin groove 112. When the motor 1 is not started, the sliding pin 111 is located in the sliding pin groove 112 of the transmission wheel 4. Under the attraction action of the electromagnet 11, the sliding pin 111 is clutched or disengaged from the presser foot lifting cam 21 or the reverse stitch crank 31. Under the clutch action of the electromagnet 11, the motor 1 rotates the sliding pin 111 to drive the presser foot lifting cam 21 or the reverse stitch crank 31 to rotate.

[0035] When it is necessary to realize the reverse stitching (i.e., needle pitch adjustment) action, the electromagnet 11 releases the control so that the sliding pin 111 is between the reverse stitching crank 31 and the sliding pin groove 112 of the transmission wheel 4. The transmission wheel 4 is dynamically connected to the reverse stitching crank 31 by the sliding pin groove 112. The motor 1 realizes the reverse stitching action by repeatedly rotating forward and reverse in the corner, specifically achieving the swinging operation of the transmission wheel 4, the sliding pin 111 and the reverse stitching crank 31 in sequence, and then the reverse stitching connecting rod 32 drives the swing seat 33 to swing, thereby realizing the swinging operation of the feed shaft 34, completing the reverse stitching action, and the motor 1 repeatedly rotates forward and reverse in the corner to realize the stitching adjustment and reverse stitching action. As another solution, according to the requirements of different stitch lengths, the motor 1 can also repeatedly rotate forward and reverse in the corner at different angles to realize the stitching adjustment and reverse stitching action.

[0036] When the presser foot lifting action is needed, the electromagnet 11 is turned on and closed, so that the sliding pin 111 is located between the presser foot lifting cam 21 and the sliding pin groove 112 of the transmission wheel 4. The transmission wheel 4 is dynamically connected to the presser foot lifting cam 21 by the sliding pin groove 112. The presser foot lifting connecting rod 22 has a round head that contacts the presser foot lifting cam 21. The round head of the presser foot lifting connecting rod 22 has a matching connecting rod groove 212, a front low point 213 and a rear low point 214 in the presser foot lifting cam 21 to abut against the operating space. When the motor 1 rotates forward and reverse once in a corner, the presser foot lifting connecting rod 22 is moved up and down between the front low point 213 and the rear low point 214 in the presser foot lifting cam 21, thereby causing the presser foot lifting connecting rod 22 to drive the needle bar 23 up and down, achieving the presser foot lifting action by the motor 1 rotating forward and reverse once in a corner. As another solution, the motor 1 can also rotate forward and reverse once in a corner at different angles to achieve the presser foot lifting action according to the requirement of the needle bar 23 lifting height.

[0037] When the above-mentioned reverse stitching action and presser foot lifting action are not performed, the electromagnet 11 is in its original state, and the sliding pin 111 is on the sliding pin groove 112 of the transmission wheel 4. It neither contacts the presser foot lifting cam 21 nor abuts against the reverse stitching crank 31. The mechanical shifting principle of the electromagnet 11 is used to realize different sewing actions.

[0038] When the thread trimming action is required, the front output shaft 12 of the motor 1 is connected to control the thread trimming mechanism 5. The motor 1 of the thread trimming mechanism 5 realizes the thread trimming action by rotating forward once within the rotation angle. The above-mentioned thread trimming mechanism 5 includes a thread cutting crank rod 51, a thread cutting drive crank 52, a connecting rod 53, a blade 55 and two thread cutting arms 54. The thread cutting crank rod 51 has a connecting body 512, a crank ball 513 and a front output shaft hole 514. The thread cutting drive crank 52 has a crank hole 521, a mounting port 522, a fixing bracket 523 and a connecting rod fixing hole 524. The fixing bracket 523 is provided with a connecting rod fixing hole 524, and the connecting rod fixing hole 524 is connected to the fixing connecting rod 53. The connecting body 512 connects the crank ball 513 and the front shaft hole 514. The crank ball 513 is installed in the connecting body 512 of the tangent crank rod 51. The tangent drive crank 52 has a mounting port 522 for the crank ball 513 to be placed in the connecting body 512. The connecting body 512 is connected to the fixing frame 523. The front shaft hole 514 of the tangent crank rod 51 is fixed on the front shaft 12; one end of the connecting rod 53 is connected to the tangent drive crank 52, and the other end of the connecting rod 53 is connected to two trimming arms 54. Under the push of the tangent drive crank 52, the connecting rod 53 drives one of the trimming arms 54 connected to the blade 55; the other fixed trimming arm 54 fixes the knife seat, and the connecting rod 53 drives the trimming arm 54 to push the blade 55.

[0039] The above-mentioned blade 55 drives the thread cutting action by relying on the motor 1 of the present application to rotate forward once within the rotation angle. The implemented action can be completed by one reverse rotation within the rotation angle, which drives the tangent crank rod 51, the tangent drive crank 52, the connecting rod 53 and the thread cutting arm 54 in sequence, and finally the blade 55 is realized.

[0040] Example 2

[0041] This embodiment is basically the same as the above-mentioned embodiment 1, except that the presser foot lifting cam 21 of the presser foot lifting mechanism 2 is different.

[0042] exist Figure 10 Figure 11 In the figure, the presser foot lifting cam 6 has a connecting rod groove 611, a rear output shaft hole 614, a front low point 612, and a rear low point 613. The presser foot lifting cam 6 is integrated with the electromagnet 11 and moves in response to the electromagnet 11. The connecting rod groove 611 of the presser foot lifting cam 6 is open, and the presser foot lifting connecting rod 22, which is in contact with the connecting rod groove 611, can enter the presser foot lifting cam 6 from the side and can also move out of the presser foot lifting cam 6 from the side. There is also a gap between the presser foot lifting cam 6 and the rear output shaft 13 to ensure that the presser foot lifting cam 6 moves in response to the electromagnet 11.

[0043] The presser foot lifting cam 6 has a connecting rod groove 611, a front low point 612, a rear low point 613 and a rear shaft hole 614. When the presser foot lifting action is required, the electromagnet 11 is turned on and attracted, so that the presser foot lifting cam 6 is pushed toward the direction of the backstitch crank 31, and the presser foot lifting connecting rod 22 enters the presser foot lifting cam 6 laterally. The presser foot lifting connecting rod 22 has a round head that contacts the presser foot lifting cam 6. After the round head of the presser foot lifting connecting rod 22 enters the connecting rod groove 611 of the presser foot lifting cam 6, the motor starts to rotate forward and reverse once within the corner to realize the presser foot lifting action, causing the round head of the presser foot lifting connecting rod 22 to have a matching connecting rod groove 611, a front low point 612 and a rear low point 613 in the presser foot lifting cam 6 to abut against the operating space. The motor 1 rotates forward and reverse once within the corner to achieve the up and down movement of the presser foot lifting connecting rod 22 between the front low point 612 and the rear low point 613 in the presser foot lifting cam 6, so that the presser foot lifting connecting rod 22 drives the needle bar 23 to move up and down, and the motor 1 rotates forward and reverse once within the corner to realize the presser foot lifting action.

[0044] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. It is worth noting that the reverse sewing action, presser foot lifting action and thread cutting action taken by the above-mentioned motor 1 involve the reverse sewing mechanism 3, presser foot lifting mechanism 2 and thread cutting mechanism 5. No matter how the front output shaft 12 and the rear output shaft 13 of the motor 1 are replaced, they are all equivalent structures or equivalent process transformations made using the contents of the description and drawings of this application, or directly or indirectly used in other related technical fields, and are similarly included in the patent protection scope of this application.

Claims

1. A structure in which one motor controls multiple sewing operations, characterized in that: The invention comprises a motor (1), wherein the motor (1) has a front output shaft (12) and a rear output shaft (13), wherein the rear output shaft (13) passes through a presser foot lifting cam (21), a transmission wheel (4) and a rear output shaft hole (130) provided by a backstitch crank (31), and the motor (1) comprises an electromagnet (11), wherein the rear output shaft (13) passes through the electromagnet (11) and is fixedly mounted on the transmission wheel (4), wherein the electromagnet (11) has a sliding pin (111) connected as an integral whole, wherein the sliding pin (111) has a rear output shaft hole (130) and a fixing plate (113), and the transmission wheel (4) has a sliding pin groove (111). 12), the presser foot lifting cam (21), the reverse stitch crank (31) and the transmission wheel (4) have the same sliding pin groove (112), the sliding pin (111) is located on the sliding pin groove (112) of the presser foot lifting cam (21), the transmission wheel (4) and the reverse stitch crank (31), the sliding pin (111) is connected to the fixed plate (113), the center position of the fixed plate (113) is provided with a rear shaft hole (130), the rear shaft hole (130) is for the rear shaft (13) to pass through; the electromagnet (11) is in an original state, and the sliding pin (111) is located on the sliding pin groove (112) of the transmission wheel (4); The reverse stitch crank (31) also has a connecting oblique arm (311) and a fixed portion (312), wherein the fixed portion (312) and the connecting oblique arm (311) are arranged at an eccentric position of the reverse stitch crank (31), and the fixed portion (312) is connected to the reverse stitch connecting rod (32); when the reverse stitching action is required, the electromagnet (11) is released from control, so that the sliding pin (111) is located between the reverse stitch crank (31) and the sliding pin groove (112) of the transmission wheel (4), and the transmission wheel (4) is dynamically connected to the reverse stitch crank (31) by means of the sliding pin groove (112), and the reverse stitch connecting rod (32) drives the swing seat (33) to swing to realize the swinging operation of the feed shaft (34), and the motor (1) repeatedly swings forward and reverse within the rotation angle to realize the reverse stitching action; The presser foot lifting cam (21) has a connecting rod groove (212) and a sliding pin groove (112), and a presser foot lifting connecting rod (22) with a round head is matched in the connecting rod groove (212); when the presser foot lifting action is required, the electromagnet (11) is turned on and attracted, so that the sliding pin (111) is located between the presser foot lifting cam (21) and the sliding pin groove (112) of the transmission wheel (4), and the transmission wheel (4) is dynamically connected to the presser foot lifting cam (21) by relying on the sliding pin groove (112); the front The output shaft (12) controls the thread trimming mechanism (5), and the thread trimming mechanism (5) includes a thread cutting crank rod (51), a thread cutting driving crank (52), a connecting rod (53), a blade (55) and two thread cutting arms (54). The front output shaft (12) passes through the encoder (14) and is fixed with the thread cutting crank rod (51). The thread cutting crank rod (51) has a connecting body (512), a crank ball (513) and a front output shaft hole (514). The connecting body (512) is connected to the crank The crank ball (513) and the forward shaft hole (514) are provided, and the crank ball (513) is installed in the connecting body (512); the tangential driving crank (52) has a crank hole (521), a mounting port (522), a fixing frame (523) and a connecting rod fixing hole (524); the crank ball (513) is installed in the crank hole (521), and the tangential driving crank (52) has a mounting port (522) for the crank ball (513) to be placed in the connecting body A connecting rod fixing hole (524) is provided on the fixing frame (523) in the body (512). The connecting rod fixing hole (524) is connected to the connecting rod (53). The other end of the connecting rod (53) is connected to two thread trimming arms (54). The connecting rod (53) drives one of the thread trimming arms (54) connected to the blade (55) under the push of the thread cutting driving crank (52); the other fixed thread trimming arm (54) fixes the blade seat, and the connecting rod (53) drives the thread trimming arm (54) to push the blade (55).

2. A structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that: The presser foot lifting cam (21) further comprises a front low point (213), a rear low point (214) and a sliding pin slot (112); the circular head of the presser foot lifting connecting rod (22) abuts against the connecting rod slot (212), the front low point (213) and the rear low point (214) for operation; and the motor (1) rotates forward and reverse once within the rotation angle to achieve the presser foot lifting action.

3. The structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that: The electromagnet (11) is mounted on a rear end cover of the motor (1), and the encoder (14) is mounted on a front end cover of the motor (1).

4. The structure for controlling multiple sewing actions by one motor according to claim 1, characterized in that: The connecting body (512) is connected to the fixing frame (523), and the front shaft hole (514) of the tangent curved rod (51) is fixed on the front shaft (12).

5. A structure in which one motor controls multiple sewing operations, characterized in that: The invention comprises a motor (1), wherein the motor (1) has a front output shaft (12) and a rear output shaft (13), wherein the rear output shaft (13) passes through a presser foot lifting cam (21), a transmission wheel (4) and a rear output shaft hole (130) provided by a backstitch crank (31), and the motor (1) comprises an electromagnet (11), wherein the rear output shaft (13) passes through the electromagnet (11) and is fixedly mounted on the transmission wheel (4), wherein the electromagnet (11) has a sliding pin (111) connected as an integral whole, wherein the sliding pin (111) has a rear output shaft hole (130) and a fixing plate (113), and the transmission wheel (4) has a sliding pin groove (111). 12), the presser foot lifting cam (21), the reverse stitch crank (31) and the transmission wheel (4) have the same sliding pin groove (112), the sliding pin (111) is located on the sliding pin groove (112) of the presser foot lifting cam (21), the transmission wheel (4) and the reverse stitch crank (31), the sliding pin (111) is connected to the fixed plate (113), the center position of the fixed plate (113) is provided with a rear shaft hole (130), the rear shaft hole (130) is for the rear shaft (13) to pass through; the electromagnet (11) is in an original state, and the sliding pin (111) is located on the sliding pin groove (112) of the transmission wheel (4); The reverse stitch crank (31) further comprises a connecting oblique arm (311) and a fixing portion (312), wherein the fixing portion (312) and the connecting oblique arm (311) are arranged at an eccentric position of the reverse stitch crank (31), and the fixing portion (312) is connected to the reverse stitch connecting rod (32); when the reverse stitching action is required, the electromagnet (11) is released from control, so that the sliding pin (111) is located between the reverse stitch crank (31) and the sliding pin groove (112) of the transmission wheel (4), and the transmission wheel (4) relies on the sliding pin groove (112) to move. The reverse stitching connecting rod (32) is dynamically connected to the reverse stitching crank (31), and the reverse stitching connecting rod (32) drives the swing seat (33) to swing to realize the swinging operation of the feed shaft (34), and the motor (1) repeatedly swings forward and reverse in the rotation angle to realize the reverse stitching action; the presser foot lifting cam (6) has a connecting rod groove (611), a rear shaft hole (614), a front low point (612) and a rear low point (613), and the presser foot lifting connecting rod (22) has a circular head that contacts the presser foot lifting cam (6), and the circular head of the presser foot lifting connecting rod (22) enters the connecting rod groove (611) of the presser foot lifting cam (6), and the circular head of the presser foot lifting connecting rod (22) The connecting rod groove (611), the front low point (612) and the rear low point (613) are in contact with each other for operation. When the presser foot lifting action is required, the electromagnet (11) is turned on and attracted, so that the sliding pin (111) is located between the presser foot lifting cam (6) and the sliding pin groove (112) of the transmission wheel (4). The transmission wheel (4) is dynamically connected to the presser foot lifting cam (6) by relying on the sliding pin groove (112); the front output shaft (12) controls the thread trimming mechanism (5), and the thread trimming mechanism (5) includes a tangent crank rod (51), a tangent driving crank (52), a connecting rod (53), a blade (55) and two thread trimming arms (54). The front shaft (12) passes through the encoder (14) and is fixedly mounted with a tangent crank rod (51), the tangent crank rod (51) having a connector (512), a crank ball (513) and a front shaft hole (514), the connector (512) connecting the crank ball (513) and the front shaft hole (514), the crank ball (513) being mounted in the connector (512); the tangent drive crank (52) having a crank hole (521), a mounting opening (522), a fixing frame (523) and a connecting rod fixing hole (524), the crank ball (513) being mounted in the crank hole (521), the front shaft hole (514) and ... The tangent driving crank (52) has an installation opening (522) for the crank ball (513) to be placed in the connector (512). The fixing frame (523) is provided with a connecting rod fixing hole (524). The connecting rod fixing hole (524) is connected to the connecting rod (53). The other end of the connecting rod (53) is connected to two cutting arms (54). Under the push of the tangent driving crank (52), the connecting rod (53) drives one of the cutting arms (54) connected to the blade (55); the other fixed cutting arm (54) fixes the blade seat, and the connecting rod (53) drives the cutting arm (54) to push the blade (55).

6. The structure for controlling multiple sewing actions by one motor according to claim 5, characterized in that: The presser foot lifting cam (6) is integrated with the electromagnet (11).

7. The structure for controlling multiple sewing actions by one motor according to claim 5, characterized in that: The connecting rod groove (611) of the presser foot lifting cam (6) is open, and the presser foot lifting connecting rod (22) abutting against the connecting rod groove (611) enters the presser foot lifting cam (6) from the horizontal direction, and there is a gap between the presser foot lifting cam (6) and the rear output shaft (13).

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