Differential sewing machine feeding mechanism

Abstract

The feeding mechanism of the differential sewing machine comprises a shell and further comprises an upper feeding mechanism, the upper feeding mechanism comprises a pressure rod and a horizontal rod, and the pressure rod and the horizontal rod are arranged in parallel; the walking presser foot is arranged at the front end of the horizontal rod, a roller is arranged on the pressure rod, and the pressure rod is matched with the walking presser foot through the roller to drive the walking presser foot to move up and down along with the pressure rod; an inner hole is formed in the feeding swing rod shaft, and the horizontal rod is arranged in the inner hole of the feeding swing rod shaft and is longitudinally and movably matched with the inner hole; the motor drives the feeding swing rod shaft to swing through the eccentric wheel transmission mechanism to drive the walking presser foot to swing back and forth; the eccentric wheel transmission mechanism comprises an eccentric wheel which is eccentrically connected with an output shaft of the motor; the eccentric connecting rod is connected to the eccentric wheel and further connected with a rocker crank. One end of the rocker shaft is connected with the rocker crank, the other end of the rocker shaft is connected with the feeding swing rod shaft, an output shaft of the motor drives the feeding swing rod shaft to swing through eccentric transmission matching of the eccentric wheel, the eccentric connecting rod, the rocker crank and the rocker shaft, an eccentric wheel transmission mechanism replaces an existing connecting rod mechanism, and the motor drives the walking presser foot to swing front and back. The requirement for installation precision during installation is lower, and assembly is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of clothing sewing equipment, in particular to a differential sewing machine feeding mechanism. Background Art

[0002] A differential sewing machine primarily uses an upper and lower thread to create a seam on the material, interweaving or stitching one or more layers of material. They are typically used for both thin and thick materials. Differential sewing machines can sew fabrics such as cotton, linen, silk, wool, and rayon, as well as products such as leather, plastic, and paper. Thin materials are typically used for knitwear, underwear, shirts, and uniforms, while thick materials are typically used for sportswear, jeans, fashion, coats, shoes, hats, leather goods, and bags. Lockstitch sewing machines are the most basic type of sewing equipment and offer the simplest stitching. They produce neat, beautiful, even, and firm seams, offering fast sewing speeds, simple operation, and easy-to-understand operation. However, if the folding knife were to extend to the edge of the bag stopper, it would become too long, resulting in unstable folding and poor quality. Existing differential sewing machines use a motor-driven linkage mechanism to achieve the walking presser foot's motion, but this linkage requires high precision installation. Summary of the Invention

[0003] In order to solve the technical defects of the prior art, the utility model provides a differential sewing machine feeding mechanism.

[0004] The technical solution adopted by the utility model is: a differential sewing machine feeding mechanism includes a housing and an upper feeding mechanism, wherein the upper feeding mechanism includes:

[0005] A pressure rod and a horizontal rod, wherein the pressure rod and the horizontal rod are arranged in parallel;

[0006] Walking presser foot, the walking presser foot is arranged at the front end of the horizontal rod, the pressure rod is provided with a roller, the pressure rod cooperates with the walking presser foot through the roller to drive the walking presser foot to move up and down with the pressure rod;

[0007] A feeding rocker shaft, wherein an inner hole is provided in the feeding rocker shaft, and the horizontal rod is arranged in the inner hole of the feeding rocker shaft and is longitudinally movable with the inner hole;

[0008] A motor, wherein the motor drives the feed swing rod shaft to swing through an eccentric wheel transmission mechanism, thereby driving the walking presser foot to swing back and forth;

[0009] The eccentric wheel transmission mechanism includes:

[0010] An eccentric wheel, wherein the eccentric wheel is eccentrically connected to the output shaft of the motor;

[0011] An eccentric connecting rod, the eccentric connecting rod is connected to the eccentric wheel, and the eccentric connecting rod is also connected to a rocker crank;

[0012] A rocker shaft, one end of which is connected to the rocker crank, and the other end is connected to the feed rocker shaft. The output shaft of the motor drives the feed rocker shaft to swing through the eccentric transmission of the eccentric wheel, the eccentric connecting rod, the rocker crank and the rocker shaft.

[0013] The eccentric connecting rod and the rocker crank, and the rocker crank and the rocker shaft are connected via a pin shaft.

[0014] The walking presser foot is provided with a horizontal groove, and the roller cooperates with the horizontal groove to realize the walking presser foot moving up and down along with the pressure rod.

[0015] The pressure rod is also provided with a pressure rod base, and the pressure rod base is movably matched with the feeding rocker shaft.

[0016] The walking presser foot is connected with a connecting rod, and two ends of the connecting rod are respectively connected to the walking presser foot and the pressure rod base.

[0017] A pressing rod is provided on the outside of the pressure rod. The pressure rod and the pressing rod are longitudinally movably matched. A pressure rod guide is provided on the pressing rod.

[0018] The pressure rod guide frame is also provided with a driving pressure arm, and the pressure rod is provided with a lifting rod connecting shaft. The driving pressure arm rotates and cooperates with the lifting rod connecting shaft to drive the pressure rod to move up and down.

[0019] It also includes a needle rod crank, which is connected to an eccentric driving connecting rod. One end of the eccentric driving connecting rod is connected to a driving crank. The head of the driving crank is provided with a roller. The roller cooperates with the driving pressure arm to drive the driving pressure arm to rotate to realize the up and down movement of the pressure rod.

[0020] The pressing rod is also provided with an adjusting screw, and a compression spring is provided between the adjusting screw and the pressing rod.

[0021] The beneficial effects of the utility model are as follows: the utility model provides a differential sewing machine feeding mechanism, comprising a shell and an upper feeding mechanism, the upper feeding mechanism comprising a pressure rod and a horizontal rod, the pressure rod and the horizontal rod being arranged in parallel; a walking presser foot is arranged at the front end of the horizontal rod, a roller is provided on the pressure rod, the pressure rod cooperates with the walking presser foot through the roller to drive the walking presser foot to move up and down with the pressure rod; an inner hole is provided in the feeding rocker shaft, the horizontal rod is arranged in the inner hole of the feeding rocker shaft and is longitudinally movably matched with the inner hole; the motor drives the feeding rocker shaft to swing through the eccentric wheel transmission mechanism The eccentric wheel transmission mechanism includes an eccentric wheel, which is eccentrically connected to the output shaft of the motor; the eccentric connecting rod is connected to the eccentric wheel, and the eccentric connecting rod is also connected to the rocker crank; one end of the rocker shaft is connected to the rocker crank, and the other end is connected to the feed rocker shaft. The output shaft of the motor drives the feed rocker shaft to swing through the eccentric transmission of the eccentric wheel, the eccentric connecting rod, the rocker crank and the rocker shaft. The eccentric wheel transmission mechanism replaces the existing connecting rod mechanism, so that the motor drives the walking presser foot to swing back and forth, the installation accuracy requirements during installation are lower, and the assembly is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the utility model.

[0023] Figure 2 This is a structural diagram of the upper feeding mechanism of the utility model.

[0024] Figure 3 This is an exploded diagram of the upper feeding mechanism structure of the utility model.

[0025] Among them, 1-shell, 2-pressure rod, 3-horizontal rod, 4-walking presser foot, 5-feeding rocker shaft, 6-motor, 7-eccentric wheel transmission mechanism, 8-pressure rod guide, 9-needle bar crank, 21-pressure rod base, 22-pressing rod, 23-lifting rod connecting shaft, 24-adjusting screw, 25-compression spring, 41-connecting rod, 71-eccentric wheel, 72-eccentric connecting rod, 73-rocker crank, 74-rocker shaft, 81-driving pressure arm, 91-eccentric driving connecting rod, 92-driving crank. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The differential sewing machine feeding mechanism includes a housing 1 and an upper feeding mechanism, wherein the upper feeding mechanism includes: a pressure rod 2 and a horizontal rod 3, wherein the pressure rod 2 and the horizontal rod 3 are arranged in parallel; a walking presser foot 4, wherein the walking presser foot 4 is arranged at the front end of the horizontal rod 3, and the pressure rod 2 is provided with a roller, wherein the pressure rod 2 cooperates with the walking presser foot 4 through the roller to drive the walking presser foot 4 to move up and down with the pressure rod 2; a feeding rocker shaft 5, wherein the feeding rocker shaft 5 is provided with an inner hole, and the horizontal rod 3 is arranged in the inner hole of the feeding rocker shaft 5 and is longitudinally movable with the inner hole; a motor 6, wherein the motor 6 is driven by an eccentric The wheel transmission mechanism drives the feed rocker shaft 5 to swing, driving the walking presser foot 4 to swing back and forth. The eccentric wheel transmission mechanism 7 includes an eccentric wheel 71, which is eccentrically connected to the output shaft of the motor 6; an eccentric connecting rod 72, which is connected to the eccentric wheel 71 and further connected to a rocker crank 73; and a rocker shaft 74, one end of which is connected to the rocker crank 73 and the other end to the feed rocker shaft 5. The output shaft of the motor 6 drives the feed rocker shaft 5 to swing through the eccentric transmission of the eccentric wheel 71, the eccentric connecting rod 72, the rocker crank 73, and the rocker shaft 74. The eccentric connecting rod 72 and the rocker crank 73, and the rocker crank 73 and the rocker shaft 74, are connected by a pin. The walking presser foot 4 is provided with a horizontal groove, and the roller cooperates with the horizontal groove to enable the walking presser foot 4 to move up and down with the pressure bar 2. The walking presser foot 4 is connected to a connecting rod 41, the ends of which are respectively connected to the walking presser foot 4 and the pressure rod base 21. During operation, the eccentric wheel swings left and right, thereby driving the rocker crank to swing left and right via the eccentric connecting rod. The rocker crank drives the feed rocker shaft to swing via the rocker shaft, thereby driving the walking presser foot to swing back and forth. The walking presser foot is kept level by the horizontal rod moving up and down within the inner hole of the feed rocker shaft. The utility model uses an eccentric wheel transmission mechanism instead of the existing connecting rod mechanism, achieving a motor-driven back and forth swing of the walking presser foot. This reduces the installation precision requirements during installation and makes assembly more convenient.

[0028] The pressure rod 2 is also provided with a pressure rod base 21, which is movably engaged with the feed rocker shaft 5. A clamping rod 22 is provided on the outside of the pressure rod 2, which is longitudinally movably engaged with the pressure rod 2 and a pressure rod guide 8 is provided on the clamping rod 22. The pressure rod guide 8 is also provided with a driving pressure arm 81, and the pressure rod 2 is provided with a lifting rod connecting shaft 23. The driving pressure arm 81 rotates and cooperates with the lifting rod connecting shaft 23 to drive the pressure rod 2 up and down. It also includes a needle rod crank 9, which is connected to an eccentric driving connecting rod 91. One end of the eccentric driving connecting rod 91 is connected to a driving crank 92. The head of the driving crank 92 is provided with a roller. The roller cooperates with the driving pressure arm 81 to drive the driving pressure arm 81 to rotate and realize the up and down movement of the pressure rod 2. The rotation of the needle bar crank drives the driving crank to rotate through the eccentric driving connecting rod. The roller at the front of the driving crank leans against the side of the driving pressure arm. The front of the driving crank rotates, and the driving pressure arm is driven to rotate through the roller. The driving pressure arm rotates, thereby driving the pressure rod to move up and down. The pressure rod pulls the walking presser foot up and down through the roller.

[0029] The pressing rod 21 is further provided with an adjusting screw 24 , and a compression spring 25 is provided between the adjusting screw 24 and the pressing rod 21 .

[0030] Technical personnel please note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent.

[0031] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A differential sewing machine feeding mechanism, comprising a housing (1), characterized in that It also includes an upper feeding mechanism, which includes: A pressure rod (2) and a horizontal rod (3), wherein the pressure rod (2) and the horizontal rod (3) are arranged in parallel; A walking presser foot (4), the walking presser foot (4) is arranged at the front end of the horizontal rod (3), the pressure rod (2) is provided with a roller, and the pressure rod (2) cooperates with the walking presser foot (4) through the roller to drive the walking presser foot (4) to move up and down along with the pressure rod (2); A feeding rocker shaft (5), wherein an inner hole is provided in the feeding rocker shaft (5), and the horizontal rod (3) is arranged in the inner hole of the feeding rocker shaft (5) and is longitudinally movable with the inner hole; A motor (6), wherein the motor (6) drives the feed swing rod shaft (5) to swing through an eccentric wheel transmission mechanism, thereby driving the walking presser foot (4) to swing back and forth; The eccentric wheel transmission mechanism (7) comprises: an eccentric wheel (71), wherein the eccentric wheel (71) is eccentrically connected to the output shaft of the motor (6); An eccentric connecting rod (72), wherein the eccentric connecting rod (72) is connected to the eccentric wheel (71), and a rocker crank (73) is also connected to the eccentric connecting rod (72); A rocker shaft (74), one end of which is connected to the rocker crank (73), and the other end of which is connected to the feed rocker shaft (5); the output shaft of the motor (6) drives the feed rocker shaft (5) to swing through the eccentric transmission of the eccentric wheel (71), the eccentric connecting rod (72), the rocker crank (73) and the rocker shaft (74).

2. The differential sewing machine feeding mechanism according to claim 1, characterized in that: The eccentric connecting rod (72) and the rocker crank (73), and the rocker crank (73) and the rocker shaft (74) are connected via a pin.

3. The differential feeding mechanism for a sewing machine according to claim 1, characterized in that: The walking presser foot (4) is provided with a horizontal groove, and the roller cooperates with the horizontal groove to enable the walking presser foot (4) to move up and down along with the pressure rod (2).

4. The differential feeding mechanism for a sewing machine according to claim 1, characterized in that: The pressure rod (2) is further provided with a pressure rod base (21), and the pressure rod base (21) is movably matched with the feed rocker shaft (5).

5. The differential feeding mechanism for a sewing machine according to claim 4, characterized in that: The walking presser foot (4) is connected to a connecting rod (41), and the two ends of the connecting rod (41) are respectively connected to the walking presser foot (4) and the pressure rod base (21).

6. The differential feeding mechanism for a sewing machine according to claim 1, characterized in that: A pressing rod (22) is provided on the outside of the pressure rod (2), the pressure rod (2) and the pressing rod (22) are longitudinally movable together, and a pressure rod guide frame (8) is provided on the pressing rod (22).

7. The differential feeding mechanism for a sewing machine according to claim 6, characterized in that: The pressure rod guide frame (8) is further provided with a driving pressure arm (81), and the pressure rod (2) is provided with a lifting rod connecting shaft (23). The driving pressure arm (81) rotates and cooperates with the lifting rod connecting shaft (23) to drive the pressure rod (2) to move up and down.

8. The differential feeding mechanism for a sewing machine according to claim 7, characterized in that: It also includes a needle rod crank (9), the needle rod crank (9) is connected to an eccentric driving connecting rod (91), one end of the eccentric driving connecting rod (91) is connected to a driving crank (92), and the head of the driving crank (92) is provided with a roller, and the roller cooperates with the driving pressure arm (81) to drive the driving pressure arm (81) to rotate to realize the up and down movement of the pressure rod (2).

9. The differential feeding mechanism for a sewing machine according to claim 6, characterized in that: The pressing rod (22) is further provided with an adjusting screw (24), and a compression spring (25) is provided between the adjusting screw (24) and the pressing rod (22).

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