Thread trimming and presser foot lifting mechanism for flat seaming machine

Abstract

The utility model relates to the technical field of sewing equipment, and discloses a trimming and presser foot lifting mechanism for a flat seaming machine, which comprises a sewing mechanism and an auxiliary mechanism, the auxiliary mechanism is movably connected to the surface of the sewing mechanism, the auxiliary mechanism comprises a thread feeding unit and a linkage unit, the thread feeding unit is movably connected to the side surface of the sewing mechanism, and the linkage unit is movably connected to the side surface of the sewing mechanism. The linkage unit is movably connected to the surface of the sewing mechanism. According to the thread trimming and presser foot lifting mechanism for the flat seaming machine, the linkage device can link the thread trimming action and the presser foot lifting action, so that the presser foot is automatically lifted after thread trimming is completed, the position of cloth is adjusted for next sewing, the accuracy and stability of the thread trimming and presser foot lifting actions are ensured, and the sewing efficiency is improved. The thread trimming and presser foot lifting mechanism is driven by the linkage structure, so that the working efficiency of the flat seaming machine is improved, the labor intensity of operators is reduced, the sewing quality is improved, and meanwhile, the mechanism is simple in structure and easy to maintain and has wide application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing equipment, in particular to a thread trimming and presser foot lifting mechanism for a stretch sewing machine. Background Art

[0002] The interlock sewing machine is a sewing machine widely used in the textile and clothing industries to sew fabrics. During the interlock sewing process, the thread ends need to be cut off and the position of the fabric needs to be adjusted through the presser foot lifting mechanism for the next sewing.

[0003] However, the existing technology still has the following shortcomings. The traditional thread cutting and presser foot lifting mechanisms of the interlock sewing machine usually adopt an independent control method, which is cumbersome to operate and inefficient. Therefore, developing a new mechanism that can realize the synchronous action of thread cutting and presser foot lifting is of great significance to improving the working efficiency and sewing quality of the interlock sewing machine. Utility Model Content

[0004] The utility model aims to provide a thread trimming and presser foot lifting mechanism for a flat sewing machine to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a thread trimming and presser foot lifting mechanism for a flat sewing machine, comprising a sewing mechanism and an auxiliary mechanism, wherein the auxiliary mechanism is movably connected to the surface of the sewing mechanism.

[0006] The auxiliary mechanism comprises a wire feeding unit and a linkage unit, wherein the wire feeding unit is movably connected to the side surface of the sewing mechanism, and the linkage unit is movably connected to the surface of the sewing mechanism.

[0007] Preferably, the sewing mechanism consists of a base, a mounting frame, a support platform, a machine head and a sewing needle. The mounting frame is fixedly connected to the bottom of the base, the support platform is fixedly connected to the top of the base, the machine head is fixedly connected to the top of the support platform, and the sewing needle is movably connected to the bottom of the machine head to perform a sewing function.

[0008] Preferably, the wire feeding unit is composed of a support rod, a wire routing frame, a placement frame, a wire roller and a wire rack. The support rod is fixedly connected to the top of the support platform, the wire routing frame is fixedly connected to the surface of the support rod, the placement frame is fixedly connected to the top of the support rod, the wire roller is rotatably connected to the side of the machine head, and the wire rack is fixedly connected to the side of the machine head, playing the main role of the wire.

[0009] Preferably, the linkage unit consists of a cross guide frame, a shearing knife, a hydraulic transmission cylinder, a connecting rod, a pushing rack, a cylinder assembly, a transmission assembly and a presser foot lifter. The cross guide frame is fixedly connected to the bottom of the machine head, the shearing knife is slidably connected to the inside of the cross guide frame, the hydraulic transmission cylinder is fixedly connected to the bottom of the machine head, the connecting rod is slidably connected to the side of the hydraulic transmission cylinder, the pushing rack is fixedly connected to the side of the connecting rod, the cylinder assembly is fixedly connected to the bottom of the machine head, the transmission assembly is fixedly connected to the bottom of the machine head, and the presser foot lifter is movably connected to the bottom of the transmission assembly, which plays a major linkage role and improves work efficiency.

[0010] Preferably, the interior of the hydraulic transmission cylinder is a loop pipe, and the hydraulic transmission cylinder is provided with a double-way outlet, and a long and a short connecting rod are respectively provided in the two outlets, so that when one end of the connecting rod moves, the inside of the hydraulic transmission cylinder is squeezed to drive the other connecting rod to move, thereby realizing the movement of approaching.

[0011] Preferably, there are two shearing knives respectively connected to the tops of two connecting rods, so that the two connecting rods can drive the shearing knives to move inwards to achieve shearing.

[0012] Preferably, a transmission gear is provided inside the transmission assembly, wherein the transmission gear is meshed with the pushing rack and the presser foot lifter, so that the pushing rack drives the transmission assembly to drive the presser foot lifter to move up and down when moving.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The thread trimming and presser foot lifting mechanism for the interlock sewing machine, when the interlock sewing machine completes one stitch, the control system receives a signal, starts the driving device to drive the thread trimmer to perform thread trimming action, and at the same time, the linkage device links the thread trimming action with the presser foot lifting action, so that the presser foot is automatically lifted after the thread trimming is completed, and the fabric position is adjusted for the next stitching, ensuring the accuracy and stability of the thread trimming and presser foot lifting actions.

[0015] 2. The thread trimming and presser foot lifting mechanism for the interlock sewing machine drives the thread trimming and presser foot lifting mechanism through a linkage structure, which not only improves the working efficiency of the interlock sewing machine, but also reduces the labor intensity of the operator and improves the sewing quality. At the same time, the mechanism has a simple structure, is easy to maintain and service, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0017] Figure 2 This is a rear view structural diagram of the utility model;

[0018] Figure 3 This is a side view of the structure of the utility model;

[0019] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0020] In the figure: 1. sewing mechanism; 101. base; 102. mounting frame; 103. support table; 104. machine head; 105. sewing needle; 2. auxiliary mechanism; 201. support rod; 202. wire rack; 203. placement rack; 204. wire roller; 205. wire rack; 211. cross guide rack; 212. shear knife; 213. hydraulic transmission cylinder; 214. connecting rod; 215. pushing rack; 216. cylinder assembly; 217. transmission assembly; 218. presser foot lifter. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides the following technical solution: a thread trimming and presser foot lifting mechanism for a stretch sewing machine, comprising a sewing mechanism 1 and an auxiliary mechanism 2, wherein the auxiliary mechanism 2 is movably connected to the surface of the sewing mechanism 1.

[0023] The auxiliary mechanism 2 includes a thread feeding unit and a linkage unit. The thread feeding unit is movably connected to the side of the sewing mechanism 1, and the linkage unit is movably connected to the surface of the sewing mechanism 1.

[0024] The sewing mechanism 1 consists of a base 101, a mounting frame 102, a support platform 103, a machine head 104 and a sewing needle 105. The mounting frame 102 is fixedly connected to the bottom of the base 101, the support platform 103 is fixedly connected to the top of the base 101, the machine head 104 is fixedly connected to the top of the support platform 103, and the sewing needle 105 is movably connected to the bottom of the machine head 104 to play a sewing role.

[0025] The wire feeding unit is composed of a support rod 201, a wire rack 202, a placement rack 203, a wire roller 204 and a wire rack 205. The support rod 201 is fixedly connected to the top of the support platform 103, the wire rack 202 is fixedly connected to the surface of the support rod 201, the placement rack 203 is fixedly connected to the top of the support rod 201, the wire roller 204 is rotatably connected to the side of the head 104, and the wire rack 205 is fixedly connected to the side of the head 104, playing the main role of the wire. The linkage unit is composed of a cross guide rack 201. 11, a shearing knife 212, a hydraulic transmission cylinder 213, a connecting rod 214, a pushing rack 215, a cylinder assembly 216, a transmission assembly 217 and a presser foot lifting 218. The cross guide frame 211 is fixedly connected to the bottom of the machine head 104, and the shearing knife 212 is slidably connected to the inside of the cross guide frame 211. The number of shearing knives 212 is two, which are respectively connected to the tops of the two connecting rods 214, so that the two connecting rods 214 drive the shearing knives 212 to move inward to achieve shearing. The hydraulic transmission cylinder 213 is fixedly connected to the bottom of the machine head 104, and the transmission assembly 217 is connected to the inside of the cross guide frame 211. The bottom of the machine head 104 is fixedly connected. The interior of the hydraulic transmission cylinder 213 is a loop pipeline, and the hydraulic transmission cylinder 213 is provided with a double-way outlet. A long and a short connecting rod 214 are respectively provided in the two outlets, so that when the connecting rod 214 at one end moves, the interior of the hydraulic transmission cylinder 213 is driven to squeeze and drive the other connecting rod 214 to move, thereby realizing the movement of approaching. The connecting rod 214 is slidably connected to the side of the hydraulic transmission cylinder 213, and the pushing rack 215 is fixedly connected to the side of the connecting rod 214. The cylinder assembly 216 is fixedly connected to the bottom of the machine head 104, and the transmission assembly 217 is fixedly connected to the bottom of the machine head 104. A transmission gear is provided inside the transmission assembly 217, wherein the transmission gear is meshed with the pushing rack 215 and the presser foot 218, so that the pushing rack 215 drives the transmission assembly 217 to drive the presser foot 218 to move up and down when moving, and the presser foot 218 is movably connected to the bottom of the transmission assembly 217, which plays a major linkage role and improves work efficiency.

[0026] When in use, the sewing needle 105 is driven by the machine head 104 to sew the cloth. After sewing, the cylinder assembly 216 is driven to drive the rack 215 to move, so that the connecting rod 214 is compressed to compress the inside of the hydraulic transmission cylinder 213 to drive the other end of the connecting rod 214 to move, so that the shear knife 212 is moved together to cut the thread. When the rack 215 moves, the gear of the internal transmission assembly 217 is rotated, thereby driving the presser foot 218 to be lifted, forming a linkage drive.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thread trimming and presser foot lifting mechanism for a flat sewing machine, comprising a sewing mechanism (1) and an auxiliary mechanism (2), characterized in that: The auxiliary mechanism (2) is movably connected to the surface of the sewing mechanism (1); The auxiliary mechanism (2) comprises a wire feeding unit and a linkage unit, the wire feeding unit being movably connected to the side of the sewing mechanism (1), and the linkage unit being movably connected to the surface of the sewing mechanism (1).

2. A thread trimming and presser foot lifting mechanism for a flat sewing machine according to claim 1, characterized in that: The sewing mechanism (1) is composed of a base (101), a mounting frame (102), a support platform (103), a machine head (104) and a sewing needle (105); the mounting frame (102) is fixedly connected to the bottom of the base (101); the support platform (103) is fixedly connected to the top of the base (101); the machine head (104) is fixedly connected to the top of the support platform (103); and the sewing needle (105) is movably connected to the bottom of the machine head (104).

3. The thread trimming and presser foot lifting mechanism for a flat sewing machine according to claim 2, characterized in that: The wire feeding unit is composed of a support rod (201), a wire routing frame (202), a placement frame (203), a wire roller (204) and a wire rack (205); the support rod (201) is fixedly connected to the top of the support platform (103); the wire routing frame (202) is fixedly connected to the surface of the support rod (201); the placement frame (203) is fixedly connected to the top of the support rod (201); the wire roller (204) is rotatably connected to the side of the machine head (104); and the wire rack (205) is fixedly connected to the side of the machine head (104).

4. The thread trimming and presser foot lifting mechanism for a flat sewing machine according to claim 3, characterized in that: The linkage unit is composed of a transverse guide frame (211), a shearing knife (212), a hydraulic transmission cylinder (213), a connecting rod (214), a pushing rack (215), a cylinder assembly (216), a transmission assembly (217) and a presser foot lifter (218). The transverse guide frame (211) is fixedly connected to the bottom of the machine head (104), the shearing knife (212) is slidably connected to the inside of the transverse guide frame (211), the hydraulic transmission cylinder (213) is fixedly connected to the bottom of the machine head (104), the connecting rod (214) is slidably connected to the side of the hydraulic transmission cylinder (213), the pushing rack (215) is fixedly connected to the side of the connecting rod (214), the cylinder assembly (216) is fixedly connected to the bottom of the machine head (104), the transmission assembly (217) is fixedly connected to the bottom of the machine head (104), and the presser foot lifter (218) is movably connected to the bottom of the transmission assembly (217).

5. The thread trimming and presser foot lifting mechanism for a flat sewing machine according to claim 4, characterized in that: The interior of the hydraulic transmission cylinder (213) is a loop pipeline, and the hydraulic transmission cylinder (213) is provided with a double-way outlet, and a long and a short connecting rod (214) are respectively provided in the two outlets.

6. The thread trimming and presser foot lifting mechanism for a flat sewing machine according to claim 5, characterized in that: The number of the shearing knives (212) is two and they are respectively connected to the tops of the two connecting rods (214).

7. A thread trimming and presser foot lifting mechanism for a flat sewing machine according to claim 6, characterized in that: A transmission gear is arranged inside the transmission assembly (217), wherein the transmission gear is meshed with the pushing rack (215) and the presser foot lifting (218).

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