Double-stepping overedger

Abstract

The utility model belongs to the technical field of sewing machines, and particularly relates to a double-stepping overedger which comprises a machine body, and a thread trimming assembly, a presser foot lifting assembly, a feed lifting tooth shaft and a feeding tooth frame are arranged in the machine body. The first stepping motor is arranged on the side face of the machine body, a first motor shaft is arranged in the first stepping motor, and double cams are installed on the periphery of the first motor shaft and used for driving the thread trimming assembly and the presser foot lifting assembly to act; the second stepping motor is arranged on the side face of the machine body, a second motor shaft is arranged in the second stepping motor, a first crank is installed on the periphery of the second motor shaft, and one end of the first crank is connected with a connecting rod. The second stepping motor can control the height of the feeding tooth frame, the rotation angle of the stepping motor is utilized to enable the teeth to operate according to the set height, through double-stepping control, non-pneumatization and non-electromagnet are achieved, production noise can be lowered, and the sewing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a double-stepping overlock sewing machine. Background Art

[0002] Overlock sewing machines are mainly used for overlock sewing of textiles and are widely used in the sewing field. The feeding process of overlock sewing machines mainly relies on the reciprocating elliptical motion of the feed tooth frame. The overlock sewing machine continuously lifts and pulls the fabric on the needle plate through the feed teeth on the feed tooth frame, thereby continuously dragging the fabric to be processed to the machine head to complete the entire feeding process. Therefore, when making different sewing materials, due to the different thickness of the sewing materials, there are different requirements for the feed tooth height of the equipment. Generally speaking, as the thickness of the sewing material changes from thin to thick, the corresponding feed tooth height also needs to change from low to high. The feed tooth height of existing equipment is relatively fixed and the adjustment is cumbersome, which places high demands on employees and is not conducive to the efficient production of clothing companies. Utility Model Content

[0003] The utility model aims to provide a double-stepping overlock sewing machine, which controls the lifting of tooth frames through a stepping motor and solves the problem of complicated adjustment operation in the prior art.

[0004] The purpose of the utility model is achieved as follows: a double-stepping overlock sewing machine, comprising a machine body, in which a thread trimming assembly, a presser foot lifting assembly, a tooth lifting shaft and a feeding tooth frame are respectively arranged;

[0005] A stepper motor 1 is arranged on the side of the machine body. A motor shaft 1 is arranged inside the stepper motor 1. A double cam is installed on the outer periphery of the motor shaft 1 for driving the thread trimming assembly and the presser foot lifting assembly;

[0006] The stepper motor 2 is arranged on the side of the machine body, and a motor shaft 2 is arranged in the stepper motor 2. A crank 1 is installed on the outer periphery of the motor shaft 2. One end of the crank 1 is connected with a connecting rod, and the other end of the tooth-lifting connecting rod is connected with the crank 2. The other end of the crank 2 is connected with the tooth-lifting shaft. The tooth-lifting shaft is rotatably arranged in the machine body, and an eccentric shaft is arranged on the other end face of the tooth-lifting shaft. A tooth-lifting adjustment slider is installed on the eccentric shaft. A fork-shaped connecting part is formed at one end of the feeding tooth rack, and the tooth-lifting adjustment slider is movably arranged in the groove of the fork-shaped connecting part to drive the feeding tooth rack to rise and fall.

[0007] Preferably, two retaining rings are respectively installed on the eccentric shaft, and the two retaining rings are respectively located on both sides of the tooth lifting adjustment slider.

[0008] Preferably, a mounting cavity for placing the stepper motor 1 in a horizontal position is formed on the side of the body, and a motor connecting plate 1 is installed on the side of the stepper motor 1, and one end of the motor connecting plate 1 is connected to the body.

[0009] Preferably, the second stepper motor is laterally arranged on the side of the machine body, and a second motor connecting plate is installed on the side of the second stepper motor, and one end of the second motor connecting plate is connected to the machine body.

[0010] Preferably, the side surface of the double cam is formed with a thread trimming driving surface for driving the thread trimming assembly to perform the thread trimming action, the thread trimming assembly includes a thread trimming rocker arm, the upper end of the thread trimming rocker arm is provided with a thread trimming pin for being pushed by the thread trimming driving surface, the middle end of the thread trimming rocker arm is rotatably connected to the machine body, the lower end of the thread trimming rocker arm is connected to a thread trimming connecting rod, the other end of the thread trimming connecting rod is connected to a thread trimming crank, the other end of the thread trimming crank is connected to a thread trimming shaft, and the other end of the thread trimming shaft is provided with scissors for thread trimming.

[0011] Preferably, the side of the double cam is formed with a cam portion for driving the presser foot lifting assembly to perform lifting and pressing actions. The presser foot lifting assembly includes a lifting and pressing lever, the upper end of the lifting and pressing lever is provided with a rotating wheel for being pushed by the cam portion, the lower end of the lifting and pressing lever is connected to a lifting and pressing shaft, and the other end of the lifting and pressing shaft is connected to the presser foot lifter.

[0012] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0013] The utility model adopts the design of dual stepper motors, so that the first stepper motor can control the presser foot lifting and thread cutting actions, while the second stepper motor can control the height of the feeding tooth frame. The rotation angle of the stepper motor is used to make the teeth run at the set height. Through the dual stepper control, pneumatic and electromagnet-free operation is achieved, which is beneficial to reducing production noise and improving sewing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 This is a structural diagram of the feeding tooth frame in the utility model.

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the thread trimmer and presser foot lifter in the utility model.

[0017] Figure 4 This is a schematic diagram of the exploded structure of the parts of the feeding tooth rack in the utility model.

[0018] Figure markings: 1-body; 2-thread trimming assembly; 3-presser foot lifting assembly; 4-tooth lifting shaft; 5-feeding tooth rack; 6-stepping motor 1; 7-motor shaft 1; 8-double cam; 9-motor shaft 2; 10-crank 1; 11-tooth lifting connecting rod; 12-crank 2; 13-stepping motor 2; 14-eccentric shaft; 15-tooth lifting adjustment slider; 16-fork-shaped connecting part; 17-retaining ring; 18-installation cavity; 19-motor connecting plate 1; 20-motor connecting plate 2; 21-thread trimming drive surface; 22-thread trimming rocker arm; 23-thread trimming pin; 24-thread trimming connecting rod; 25-thread trimming crank; 26-thread trimming shaft; 27-scissors; 28-cam part; 29-lifting and pressing lever; 30-rotating wheel; 31-lifting and pressing shaft. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-4 As shown, a double-stepping overlock sewing machine includes a machine body 1, in which a thread trimming assembly 2, a presser foot lifting assembly 3, a tooth lifting shaft 4 and a feeding tooth frame 5 are respectively arranged;

[0021] A stepper motor 6 is provided on the side of the machine body 1. A motor shaft 7 is provided inside the stepper motor 6. A double cam 8 is installed on the outer periphery of the motor shaft 7 for driving the thread trimmer assembly 2 and the presser foot lifting assembly 3.

[0022] A stepper motor 2 13 is provided on the side of the machine body 1, and a motor shaft 2 9 is provided in the stepper motor 2 13, and a crank 10 is installed on the periphery of the motor shaft 2 9, and one end of the crank 10 is connected to a tooth-lifting connecting rod 11, and the other end of the tooth-lifting connecting rod 11 is connected to a crank 2 12, and the other end of the crank 2 12 is connected to a tooth-lifting shaft 4, and the tooth-lifting shaft 4 is rotatably provided in the machine body 1, and an eccentric shaft 14 is provided on the other end face of the tooth-lifting shaft 4, and a tooth-lifting adjustment slider 15 is installed on the eccentric shaft 14, and a fork-shaped connecting part 16 is formed at one end of the feeding tooth rack 5, and the tooth-lifting adjustment slider 15 is movably provided in the groove of the fork-shaped connecting part 16 to drive the feeding tooth rack 5 to rise and fall.

[0023] The utility model adopts the design of dual stepper motors, so that the first stepper motor can control the presser foot lifting and thread cutting actions, while the second stepper motor can control the height of the feeding tooth frame 5. The rotation angle of the stepper motor is used to make the teeth run at a set height. Through dual stepping control, pneumatic and electromagnet-free operation is achieved, which is beneficial to reducing production noise and improving sewing effect.

[0024] Combine Figure 2 and Figure 4 Two retaining rings 17 are respectively installed on the eccentric shaft 14. The two retaining rings 17 are respectively located on both sides of the tooth lifting adjustment slider 15 to fix the position of the tooth lifting adjustment slider 15.

[0025] Combine Figure 1 and Figure 3 The side of the body 1 is formed with an installation cavity 18 for placing the stepper motor 6 in a horizontal position. The side of the stepper motor 6 is installed with a motor connecting plate 19. One end of the motor connecting plate 19 is connected to the body 1, thereby fixing the stepper motor 6.

[0026] Combine Figure 1 and Figure 2 The stepper motor 2 13 is horizontally arranged on the side of the body 1, and a motor connecting plate 20 is installed on the side of the stepper motor 13. One end of the motor connecting plate 20 is connected to the body 1, thereby fixing the stepper motor 13.

[0027] Combine Figure 1 and Figure 3 The side surface of the double cam 8 is formed with a trimming drive surface 21 for driving the trimming assembly 2 to perform the trimming action. The trimming assembly 2 includes a trimming rocker arm 22, and the upper end of the trimming rocker arm 22 is provided with a trimming pin 23 for being pushed by the trimming drive surface 21. The middle end of the trimming rocker arm 22 is rotatably connected to the body 1, and the lower end of the trimming rocker arm 22 is connected with a trimming connecting rod 24, and the other end of the trimming connecting rod 24 is connected with a trimming crank 25, and the other end of the trimming crank 25 is connected with a trimming shaft 26, and the other end of the trimming shaft 26 is provided with a scissors 27 for trimming the thread. In the actual working process of this technical solution, when the double cam 8 rotates, the trimming pin 23 will be pushed to move by the trimming drive surface 21, thereby driving the trimming rocker arm 22, the trimming connecting rod 24, the trimming crank 25, the trimming shaft 26, and the scissors 27 to rotate in turn.

[0028] Combine Figure 1 and Figure 3 The side of the double cam 8 is formed with a cam portion 28 for driving the presser foot lifting assembly 3 to perform the lifting and pressing action. The presser foot lifting assembly 3 includes a lifting and pressing lever 29. The upper end of the lifting and pressing lever 29 is provided with a rotating wheel 30 for being pushed by the cam portion 28. The lower end of the lifting and pressing lever 29 is connected to a lifting and pressing shaft 31, and the other end of the lifting and pressing shaft 31 is connected to the presser foot lifter. In the actual working process of this technical solution, when the double cam 8 rotates, the cam portion 28 will push the lifting and pressing lever 29 to rotate, thereby driving the lifting and pressing shaft 31 and the presser foot lifting action in turn.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A double-stepping overlock sewing machine, characterized in that: The machine comprises a body (1), wherein a thread cutting assembly (2), a presser foot lifting assembly (3), a tooth lifting shaft (4) and a feeding tooth frame (5) are respectively arranged in the body (1); A stepper motor (6) is arranged on the side of the machine body (1), a motor shaft (7) is arranged inside the stepper motor (6), and a double cam (8) is installed on the outer periphery of the motor shaft (7) for driving the thread trimming assembly (2) and the presser foot lifting assembly (3) to move; A second stepper motor (13) is provided on the side of the machine body (1). A second motor shaft (9) is provided in the second stepper motor (13). A first crank (10) is installed on the outer periphery of the second motor shaft (9). One end of the first crank (10) is connected to a tooth-lifting connecting rod (11). The other end of the tooth-lifting connecting rod (11) is connected to a second crank (12). The other end of the second crank (12) is connected to a tooth-lifting shaft (4). The tooth-lifting shaft (4) is rotatably provided in the machine body (1). An eccentric shaft (14) is provided on the other end face of the tooth-lifting shaft (4). A tooth-lifting adjustment slider (15) is installed on the eccentric shaft (14). A fork-shaped connecting portion (16) is formed at one end of the feeding tooth frame (5). The tooth-lifting adjustment slider (15) is movably provided in a groove of the fork-shaped connecting portion (16) to drive the feeding tooth frame (5) to rise and fall.

2. The double-stepping overlock sewing machine according to claim 1, characterized in that: Two retaining rings (17) are respectively installed on the eccentric shaft (14), and the two retaining rings (17) are respectively located on both sides of the tooth lifting adjustment slider (15).

3. The double-stepping overlock sewing machine according to claim 1, characterized in that: The side of the body (1) is formed with an installation cavity (18) for placing a stepper motor (6) in a horizontal manner. The side of the stepper motor (6) is installed with a motor connecting plate (19), and one end of the motor connecting plate (19) is connected to the body (1).

4. The double-stepping overlock sewing machine according to claim 1, characterized in that: The second stepping motor (13) is laterally arranged on the side of the machine body (1), and a second motor connecting plate (20) is installed on the side of the second stepping motor (13), and one end of the second motor connecting plate (20) is connected to the machine body (1).

5. The double-stepping overlock sewing machine according to claim 1, characterized in that: The side surface of the double cam (8) is formed with a thread trimming driving curved surface (21) for driving the thread trimming assembly (2) to perform a thread trimming action. The thread trimming assembly (2) includes a thread trimming rocker arm (22). The upper end of the thread trimming rocker arm (22) is provided with a thread trimming pin (23) for being pushed by the thread trimming driving curved surface (21). The middle end of the thread trimming rocker arm (22) is rotatably connected to the machine body (1). The lower end of the thread trimming rocker arm (22) is connected to a thread trimming connecting rod (24). The other end of the thread trimming connecting rod (24) is connected to a thread trimming crank (25). The other end of the thread trimming crank (25) is connected to a thread trimming shaft (26). The other end of the thread trimming shaft (26) is provided with scissors (27) for thread trimming.

6. The double-stepping overlock sewing machine according to claim 1, characterized in that: The side of the double cam (8) is formed with a cam portion (28) for driving the presser foot lifting assembly (3) to perform a lifting and pressing action. The presser foot lifting assembly (3) includes a lifting and pressing lever (29). The upper end of the lifting and pressing lever (29) is provided with a rotating wheel (30) for being pushed by the cam portion (28). The lower end of the lifting and pressing lever (29) is connected to a lifting and pressing shaft (31), and the other end of the lifting and pressing shaft (31) is connected to the presser foot lifting assembly.

Images