A sewing machine with upper differential, presser foot lifting, thread trimming and needle spacing mechanism

Abstract

The utility model belongs to sewing machine technical field, concretely relates to a sewing machine with upper differential, lift presser foot, cut thread and adjust needle spacing mechanism, including machine body and base, motor one is provided with output shaft one, and the one end of output shaft one projects motor one and is installed lift presser foot cam and differential feeding cam respectively, and lift presser foot cam is used for controlling lift presser foot mechanism, and differential feeding cam is used for controlling upper differential feeding mechanism, motor two is provided with output shaft two, and the both ends of output shaft two project motor two and are installed cut thread cam and needle spacing adjusting cam respectively, and cut thread cam is used for controlling cut thread mechanism, and needle spacing adjusting cam is used for controlling needle spacing adjusting mechanism, the utility model discloses through motor one to control the work of lift presser foot mechanism and upper differential feeding mechanism respectively, through motor two to control the work of cut thread mechanism and needle spacing adjusting mechanism respectively, and through motor control can realize the synchronous operation between each mechanism, convenient operation, simple structure.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and specifically to a sewing machine with an upper differential, presser foot lifting, thread cutting, and needle length adjustment mechanism. Background Technology

[0002] With the development of mechanical automation technology, more and more equipment is required by users to have diversified function control. Therefore, existing sewing machines have functions such as presser foot lifting, thread cutting, differential adjustment, and stitch length adjustment.

[0003] For example, Chinese utility model patent number CN202420925282.5 discloses a sewing machine with a single motor driving the presser foot and differential adjustment, which uses one motor as a power source to realize the adjustment of the presser foot and differential adjustment respectively.

[0004] For example, Chinese invention patent number CN202211193682.3 discloses a sewing machine in which a single motor controls the stitch length adjustment mechanism, the thread cutting mechanism, and the presser foot lifting mechanism.

[0005] The existing sewing machine has a complex structure, so further improvements to its structure are needed. Utility Model Content

[0006] The purpose of this invention is to provide a sewing machine with a differential mechanism, a presser foot lifting mechanism, a thread cutting mechanism, and a stitch length adjustment mechanism. Through the novel design of the mechanism, the problem of complex structure is solved.

[0007] The purpose of this invention is achieved as follows: a sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms, comprising a machine body and a base.

[0008] The machine body is respectively equipped with a pressing foot lifting mechanism, an upper differential feeding mechanism, an upper shaft and a differential swing shaft, and a motor is installed on the side of the machine body;

[0009] The base is equipped with a needle pitch adjustment mechanism, a thread cutting mechanism and a feeding shaft, and a motor is installed in the middle of the base.

[0010] The motor is equipped with an output shaft, one end of which extends out of the motor and is respectively mounted with a lifting foot cam and a differential feeding cam. The lifting foot cam is used to control the lifting foot mechanism, and the differential feeding cam is used to control the upper differential feeding mechanism.

[0011] The motor 2 is equipped with an output shaft 2. Both ends of the output shaft 2 extend out of the motor 2 and are respectively equipped with a thread-cutting cam and a stitch-pitch adjustment cam. The thread-cutting cam is used to control the thread-cutting mechanism, and the stitch-pitch adjustment cam is used to control the stitch-pitch adjustment mechanism.

[0012] The upper differential feeding mechanism includes a differential rocker arm, and a differential adjustment push column for the differential feeding cam to push is provided on the side of the differential rocker arm. One end of the differential rocker arm is hinged to the machine body, and the other end of the differential rocker arm is hinged to a differential connecting rod. The other end of the differential connecting rod is connected to a differential swing seat assembly. The differential swing seat assembly is rotatably mounted in the machine body through a swing shaft. An upper feeding connecting rod is installed on the outer periphery of the upper shaft. The other end of the upper feeding connecting rod is hinged to the differential swing seat assembly. An upper feeding crank is installed on the outer periphery of the differential swing shaft. The other end of the upper feeding crank is hinged to the differential swing seat assembly.

[0013] Preferably, one end of the differential rocker arm is connected to a hinge seat, and a hinge shaft is provided between the hinge seat and the differential rocker arm. The hinge seat is fixedly connected to the inner wall of the machine body by fasteners.

[0014] Preferably, a return spring is connected between the differential linkage and the machine body.

[0015] Preferably, the lifting foot mechanism includes a lifting rocker arm, and a lifting adjustment push column for the lifting foot cam to push is provided on the side of the lifting rocker arm. One end of the lifting rocker arm is hinged to the machine body, and the other end of the lifting rocker arm is hinged to a lifting connecting rod. The other end of the lifting connecting rod is connected to a front lifting lever. The front lifting lever is connected to a rear lifting lever through a pull rod. The rear lifting lever is connected to a lifting component. The lifting component is connected to a pressure rod, and a pressure foot is provided at the lower end of the pressure rod.

[0016] Preferably, one end of the lifting and pressing swing arm is connected to a second hinge seat, and a second hinge shaft is provided between the second hinge seat and the lifting and pressing swing arm. The second hinge seat is fixedly connected to the inner wall of the machine body by fasteners.

[0017] Preferably, the wire cutting mechanism includes a wire cutting shaft, a return spring is installed on the outer periphery of the wire cutting shaft, a wire cutting crank is installed at one end of the wire cutting shaft, the wire cutting crank is connected to a scissor assembly, a front fork is installed at the other end of the wire cutting shaft, a wire cutting part and a return part are respectively formed at one end of the front fork, a wire cutting push column is provided at one end of the wire cutting cam, and a fork for the wire cutting push column to move between the wire cutting part and the return part is provided.

[0018] Preferably, the stitch pitch adjustment mechanism includes a stitch pitch adjustment shaft, one end of which is equipped with a stitch pitch lever, and the side of the stitch pitch lever is provided with a stitch pitch adjustment push column for being pushed by a stitch pitch adjustment cam. The other end of the stitch pitch adjustment shaft is rotatably mounted in the machine body. A stitch pitch crank is mounted on the outer periphery of the middle part of the stitch pitch adjustment shaft. The stitch pitch crank is connected to a stitch pitch connecting rod, and the stitch pitch connecting rod is connected to a stitch pitch swing seat assembly. The stitch pitch swing seat assembly is rotatably mounted in the machine body through a swing shaft. The other end of the stitch pitch swing seat assembly is connected to a stitch pitch crank, and the other end of the stitch pitch crank is mounted on the outer periphery of the feeding shaft.

[0019] Preferably, the machine body has a mounting base formed therein, and the upper end of the mounting base has a mounting hole for mounting the first output shaft, and a bushing is provided between the first output shaft and the mounting hole.

[0020] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0021] This invention uses a motor to control the operation of the presser foot lifting mechanism and the upper differential feeding mechanism, and a motor to control the operation of the thread cutting mechanism and the needle pitch adjustment mechanism. Furthermore, the motor control enables synchronous operation between the various mechanisms, making it convenient to operate and simple in structure. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure 1 .

[0024] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 2 .

[0025] Figure 4 This is a schematic diagram of the thread-cutting mechanism and the needle-pitch adjustment mechanism.

[0026] Figure 5 This is a schematic diagram of the upper differential feeding mechanism.

[0027] Figure 6 This is a schematic diagram of the presser foot lifting mechanism.

[0028] Figure 7 This is a structural diagram of the body and base.

[0029] Reference numerals: 1-Machine body; 2-Base; 3-Lifting presser foot mechanism; 4-Upper differential feeding mechanism; 5-Upper shaft; 6-Differential swing shaft; 7-Motor 1; 8-Pin length adjustment mechanism; 9-Thread cutting mechanism; 10-Feeding shaft; 11-Motor 2; 12-Output shaft 1; 13-Lifting presser foot cam; 14-Differential feeding cam; 15-Output shaft 2; 16-Thread cutting cam; 17-Pin length adjustment cam; 18-Differential swing arm; 19-Differential adjustment push column; 20-Differential connecting rod; 21-Differential swing seat assembly; 22-Swing shaft 1; 23-Upper feeding connecting rod; 24-Upper feeding crank; 25-Hinge seat 1; 26-Hinge shaft 1; 27-Reset tension spring; 28-Lifting presser foot swing arm; 29- 30-Lifting and pressing adjustment push column; 31-Lifting and pressing front lever; 32-Pull rod; 33-Lifting and pressing rear lever; 34-Lifting and pressing component; 35-Pressure rod; 36-Pressure foot; 37-Hinge seat two; 38-Hinge shaft two; 39-Thread cutting shaft; 40-Return spring; 41-Thread cutting crank; 42-Scissors assembly; 43-Front fork; 44-Thread cutting part; 45-Returning part; 46-Thread cutting push column; 47-Fork opening; 48-Pitch adjustment shaft; 49-Pitch swing rod; 50-Pitch adjustment push column; 51-Pitch crank one; 52-Pitch connecting rod; 53-Pitch swing seat assembly; 54-Swing shaft two; 55-Pitch crank two; 56-Mounting seat; 57-Mounting hole; 58-Shaft sleeve. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1-7 As shown, a sewing machine with an upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanism includes a machine body 1 and a base 2.

[0032] The machine body 1 is equipped with a lifting foot mechanism 3, an upper differential feeding mechanism 4, an upper shaft 5 and a differential swing shaft 6, and a motor 7 is installed on the side of the machine body 1.

[0033] The base 2 is equipped with a needle pitch adjustment mechanism 8, a thread cutting mechanism 9 and a feeding shaft 10, and a motor 11 is installed in the middle of the base 2.

[0034] The motor 7 is provided with an output shaft 12. One end of the output shaft 12 extends out of the motor 7 and is respectively equipped with a lifting foot cam 13 and a differential feeding cam 14. The lifting foot cam 13 is used to control the lifting foot mechanism 3, and the differential feeding cam 14 is used to control the upper differential feeding mechanism 4.

[0035] The motor 2 11 is provided with an output shaft 2 15. The two ends of the output shaft 2 15 extend out of the motor 2 11 and are respectively equipped with a thread-cutting cam 16 and a stitch-pitch adjustment cam 17. The thread-cutting cam 16 is used to control the thread-cutting mechanism 9, and the stitch-pitch adjustment cam 17 is used to control the stitch-pitch adjustment mechanism 8.

[0036] The upper differential feeding mechanism 4 includes a differential rocker arm 18. A differential adjustment push column 19, driven by a differential feeding cam 14, is provided on the side of the differential rocker arm 18. One end of the differential rocker arm 18 is hinged to the machine body 1, and the other end is hinged to a differential connecting rod 20. The other end of the differential connecting rod 20 is connected to a differential swing seat assembly 21. The differential swing seat assembly 21 is rotatably mounted inside the machine body 1 via a swing shaft 22. An upper feeding connecting rod 23 is installed on the outer periphery of the upper shaft 5. The other end of the upper feeding connecting rod 23 is hinged to the differential swing seat assembly 21. The differential swing shaft... The outer periphery of 6 is equipped with an upper feeding crank 24. The other end of the upper feeding crank 24 is hinged to the differential swing seat assembly 21. In actual operation, when the motor 7 drives the differential feeding cam 14 to rotate through the output shaft 12, it will push the differential swing rod 18 to swing through the differential adjustment push column 19, and then drive the differential swing seat assembly 21 to rotate around the swing shaft 22 through the differential connecting rod 20, thereby changing the installation position angle of the differential swing seat assembly 21 and thus changing the transmission efficiency of the upper differential feeding mechanism, thereby realizing the automatic adjustment of the differential amount of the differential sewing machine.

[0037] This utility model uses motor 7 to control the operation of the presser foot lifting mechanism and the upper differential feeding mechanism respectively, and motor 2 to control the operation of the thread cutting mechanism and the needle pitch adjustment mechanism respectively. Furthermore, the synchronous operation between the various mechanisms can be achieved through motor control, making it convenient to operate and simple in structure.

[0038] One end of the differential rocker arm 18 is connected to a hinge seat 25. A hinge shaft 26 is provided between the hinge seat 25 and the differential rocker arm 18 to realize the hinge connection between the two. The hinge seat 25 is fixedly connected to the inner wall of the machine body 1 by fasteners. This connection structure is simple, easy to install and debug, and can be applied to different models of sewing machines.

[0039] A return spring 27 is connected between the differential linkage 20 and the body 1.

[0040] The lifting foot mechanism 3 includes a lifting rocker arm 28. The side of the lifting rocker arm 28 is provided with a lifting adjustment push column 29 for the lifting foot cam 13 to push. One end of the lifting rocker arm 28 is hinged to the body 1, and the other end of the lifting rocker arm 28 is hinged to a lifting connecting rod 30. The other end of the lifting connecting rod 30 is connected to a front lifting lever 31. The front lifting lever 31 is connected to a rear lifting lever 33 through a pull rod 32. The rear lifting lever 33 is connected to a lifting member 34. The lifting member 34 is connected to a pressure rod 35. The lower end of the pressure rod 35 is provided with a pressure foot 36.

[0041] One end of the lifting and pressing swing arm 28 is connected to a hinge seat 37. A hinge shaft 38 is provided between the hinge seat 37 and the lifting and pressing swing arm 28 to realize the hinge connection between the two. The hinge seat 37 is fixedly connected to the inner wall of the machine body 1 by fasteners. This connection structure is simple, easy to install and debug, and can be applied to different models of sewing machines.

[0042] The wire cutting mechanism 9 includes a wire cutting shaft 39, a return spring 40 installed on the outer periphery of the wire cutting shaft 39, a wire cutting crank 41 installed at one end of the wire cutting shaft 39, a scissor assembly 42 connected to the wire cutting crank 41, and a front fork 43 installed at the other end of the wire cutting shaft 39. One end of the front fork 43 is respectively formed with a wire cutting part 44 and a return part 45. One end of the wire cutting cam 16 is provided with a wire cutting push column 46. A fork 47 is provided between the wire cutting part 44 and the return part 45 for the wire cutting push column 46 to move. In actual operation, when the motor 11 drives the wire cutting push column 46 of the wire cutting cam 16 to reciprocate within the fork 47, it will drive the front fork 43 to rotate reciprocally, thereby realizing the wire cutting action.

[0043] The stitch length adjustment mechanism 8 includes a stitch length adjustment shaft 48. A stitch length rocker arm 49 is mounted at one end of the stitch length adjustment shaft 48. A stitch length adjustment push column 50, which is pushed by the stitch length adjustment cam 17, is provided on the side of the stitch length rocker arm 49. The other end of the stitch length adjustment shaft 48 is rotatably mounted inside the machine body 1. A stitch length crank 51 is mounted on the outer periphery of the middle part of the stitch length adjustment shaft 48. The stitch length crank 51 is connected to a stitch length connecting rod 52. The stitch length connecting rod 52 is connected to a stitch length swing seat assembly 53. The needle pitch swing seat assembly 53 is rotatably mounted inside the machine body 1 via the swing shaft 2 54. The other end of the needle pitch swing seat assembly 53 is connected to the needle pitch crank 2 55. The other end of the needle pitch crank 2 55 is installed on the outer periphery of the feed shaft 10. When the motor 2 11 drives the needle pitch adjustment cam 17 to rotate, the needle pitch adjustment push column 50 can push the needle pitch swing rod 49 to rotate. Then, the installation angle of the needle pitch swing seat assembly 53 can be adjusted by the needle pitch adjustment shaft 48, the needle pitch crank 1 51, and the needle pitch connecting rod 52, thereby achieving different needle pitches.

[0044] The body 1 has a mounting base 56 formed inside. The upper end of the mounting base 56 has a mounting hole 57 for mounting the output shaft 12. A bushing 58 is provided between the output shaft 12 and the mounting hole 57 to improve the stability of the output shaft 12 when rotating.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sewing machine having an upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanism, comprising a machine body (1) and a base (2), characterized in that: The machine body (1) is respectively provided with a lifting foot mechanism (3), an upper differential feeding mechanism (4), an upper shaft (5) and a differential swing shaft (6), and a motor (7) is installed on the side of the machine body (1); The base (2) is respectively provided with a needle pitch adjustment mechanism (8), a thread cutting mechanism (9) and a feeding shaft (10), and a motor (11) is installed in the middle of the base (2); The motor (7) is provided with an output shaft (12). One end of the output shaft (12) extends out of the motor (7) and is respectively equipped with a lifting foot cam (13) and a differential feeding cam (14). The lifting foot cam (13) is used to control the lifting foot mechanism (3), and the differential feeding cam (14) is used to control the upper differential feeding mechanism (4). The motor 2 (11) is provided with an output shaft 2 (15). The two ends of the output shaft 2 (15) extend out of the motor 2 (11) and are respectively equipped with a thread-cutting cam (16) and a stitch-pitch adjustment cam (17). The thread-cutting cam (16) is used to control the thread-cutting mechanism (9), and the stitch-pitch adjustment cam (17) is used to control the stitch-pitch adjustment mechanism (8). The upper differential feeding mechanism (4) includes a differential rocker arm (18), and a differential adjustment push column (19) for the differential feeding cam (14) to push is provided on the side of the differential rocker arm (18). One end of the differential rocker arm (18) is hinged to the machine body (1), and the other end of the differential rocker arm (18) is hinged to a differential connecting rod (20). The other end of the differential connecting rod (20) is connected to a differential swing seat assembly (21). The differential swing seat assembly (21) is rotatably installed in the machine body (1) through a swing shaft (22). An upper feeding connecting rod (23) is installed on the outer periphery of the upper shaft (5). The other end of the upper feeding connecting rod (23) is hinged to the differential swing seat assembly (21). An upper feeding crank (24) is installed on the outer periphery of the differential swing shaft (6). The other end of the upper feeding crank (24) is hinged to the differential swing seat assembly (21).

2. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 1, characterized in that: One end of the differential rocker arm (18) is connected to a hinge seat (25), and a hinge shaft (26) is provided between the hinge seat (25) and the differential rocker arm (18). The hinge seat (25) is fixedly connected to the inner wall of the machine body (1) by fasteners.

3. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 1, characterized in that: A return spring (27) is connected between the differential linkage (20) and the body (1).

4. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 1, characterized in that: The lifting foot mechanism (3) includes a lifting swing arm (28), and a lifting adjustment push column (29) for the lifting foot cam (13) to push is provided on the side of the lifting swing arm (28). One end of the lifting swing arm (28) is hinged to the body (1), and the other end of the lifting swing arm (28) is hinged to a lifting connecting rod (30). The other end of the lifting connecting rod (30) is connected to a front lifting lever (31). The front lifting lever (31) is connected to a rear lifting lever (33) through a pull rod (32). The rear lifting lever (33) is connected to a lifting component (34). The lifting component (34) is connected to a pressure rod (35). The lower end of the pressure rod (35) is provided with a pressure foot (36).

5. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 4, characterized in that: One end of the lifting and pressing swing arm (28) is connected to a hinge seat two (37), and a hinge shaft two (38) is provided between the hinge seat two (37) and the lifting and pressing swing arm (28). The hinge seat two (37) is fixedly connected to the inner wall of the machine body (1) by fasteners.

6. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 1, characterized in that: The wire cutting mechanism (9) includes a wire cutting shaft (39), a return spring (40) is installed on the outer periphery of the wire cutting shaft (39), a wire cutting crank (41) is installed at one end of the wire cutting shaft (39), the wire cutting crank (41) is connected to a scissor assembly (42), a front fork (43) is installed at the other end of the wire cutting shaft (39), a wire cutting part (44) and a return part (45) are respectively formed at one end of the front fork (43), a wire cutting push column (46) is provided at one end of the wire cutting cam (16), and a fork (47) for the wire cutting push column (46) to move is provided between the wire cutting part (44) and the return part (45).

7. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 1, characterized in that: The stitch pitch adjustment mechanism (8) includes a stitch pitch adjustment shaft (48), one end of which is equipped with a stitch pitch lever (49), and the side of the stitch pitch lever (49) is provided with a stitch pitch adjustment push column (50) for the stitch pitch adjustment cam (17) to push. The other end of the stitch pitch adjustment shaft (48) is rotatably disposed in the machine body (1). A stitch pitch crank (51) is installed on the outer periphery of the middle part of the stitch pitch adjustment shaft (48). The stitch pitch crank (51) is connected to a stitch pitch connecting rod (52). The stitch pitch connecting rod (52) is connected to a stitch pitch swing seat assembly (53). The stitch pitch swing seat assembly (53) is rotatably disposed in the machine body (1) through a swing shaft (54). The other end of the stitch pitch swing seat assembly (53) is connected to a stitch pitch crank (55). The other end of the stitch pitch crank (55) is installed on the outer periphery of the feeding shaft (10).

8. The sewing machine with upper differential, presser foot lifting, thread cutting, and stitch length adjustment mechanisms according to claim 1, characterized in that: The body (1) has a mounting base (56) formed inside. The upper end of the mounting base (56) is provided with a mounting hole (57) for mounting the output shaft (12). A bushing (58) is provided between the output shaft (12) and the mounting hole (57).

Images