A material clamping structure of a curved product automatic sewing machine

Abstract

The utility model discloses a kind of material clamping structures of automatic sewing machine of curved surface product, its rack is fixed with sewing head, product backing pad assembly is assembled with below sewing head on rack, product backing pad assembly includes with the fixed cylinder of rack being fixed, movable cylinder is equipped with outside fixed cylinder, pre-fixing station is provided on fixed cylinder, pre-fixing station is provided with the pre-fixing clamping mechanism that can move along the axial direction of fixed cylinder, pre-fixing clamping mechanism is provided with centering mechanism, movable cylinder position sets up sewing station, sewing clamping mechanism is set up on movable cylinder, pre-fixing clamping mechanism is axially conveyed from pre-fixing station to sewing station after curved surface product is clamped and fixed.The advantage lies in: the material clamping structure can realize the pre-fixing, centering of to-be-sewn curved surface product, the conveying from pre-fixing station to sewing station, the fixation when sewing, to realize the automatic sewing processing of curved surface product, can greatly improve production efficiency and product quality, reduce the working intensity of laborer.

Description

Technical Field

[0001] This utility model relates to the field of curved surface product sewing technology, specifically a clamping structure for an automatic sewing machine for curved surface products. Background Technology

[0002] Curved products (such as hood flaps) are frequently encountered sewing components in the sewing process. Because the sewing platform is flat, curved products need to be flattened before sewing. To ensure sewing quality, the curved product must remain flat during the sewing process. For some softer curved products, such as those made of hard, curved leather, flattening is relatively easy. However, for curved products like hood flaps, which have a certain degree of hardness and resilience, flattening is more difficult. This forces workers to constantly apply pressure to keep the curved product flat during sewing, increasing labor intensity and affecting sewing quality, resulting in poor product consistency and low production efficiency. Furthermore, the process requires operators to maintain a sitting or standing posture, leading to high labor intensity. Therefore, an automatic sewing machine capable of sewing curved products needs to be designed. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned deficiencies and disclose to the public a clamping structure for an automatic sewing machine for curved products that has a reasonable structure, can improve production efficiency and product consistency, and reduce the labor intensity of workers.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A clamping structure for an automatic sewing machine for curved products includes a frame, a sewing machine head fixed on the frame, a product liner assembly mounted on the frame below the sewing machine head, the product liner assembly including a fixed cylinder fixed to the frame, a movable cylinder outer sleeve on the fixed cylinder, a pre-fixing station on the fixed cylinder, a pre-fixing clamping mechanism axially movable along the fixed cylinder, a centering mechanism on the pre-fixing clamping mechanism, and a sewing station on the movable cylinder, a sewing clamping mechanism on the movable cylinder, wherein the pre-fixing clamping mechanism clamps and fixes the curved product and then axially transports it from the pre-fixing station to the sewing station.

[0006] Further optimization measures for this technical solution are as follows:

[0007] As an improvement, the pre-fixed clamping mechanism includes an axial movement drive device, on which a mounting bracket is connected. A push plate is provided at the inner end of the mounting bracket, and pre-fixed grippers are respectively provided on both sides of the mounting bracket. A downward pressure drive device is also provided on the mounting bracket, and a downward pressure plate is connected to the downward pressure drive device. After the pre-fixed grippers clamp and fix the curved surface product to be sewn, the axial movement drive device drives the mounting bracket to move, and the push plate pushes the curved surface product to be sewn from the pre-fixed station to the sewing station.

[0008] As an improvement, the pre-fixed gripper includes a first gripper driving device, a first driving connector, and a first chuck assembly. The middle part of the first driving connector is hinged to the mounting bracket, one end of the first driving connector is hinged to the first extension rod of the first gripper driving device, and the first chuck assembly is fixed to the other end of the first driving connector.

[0009] As an improvement, the axial movement drive device is disposed inside the fixed cylinder, and the fixed cylinder is provided with an axial guide groove. The axial movement drive device is connected to the mounting bracket through a first connecting rod, which extends out of the axial guide groove. The axial guide groove enables smoother and more stable pushing of the curved surface product to be stitched.

[0010] As an improvement, the centering mechanism includes a centering drive device, a second connecting rod, and a push block. A moving block is connected to the centering drive device, and the push block is hinged to the fixed cylinder. The second connecting rod is symmetrically arranged on both sides of the centering drive device, with one end hinged to the moving block and the other end hinged to the corresponding push block. This centering mechanism centers the curved surface product to be sewn at the pre-fixed station, preventing positional deviations that could affect subsequent product quality when the feeding mechanism transfers the product from the material frame to the pre-fixed station.

[0011] As an improvement, circumferential guide grooves are symmetrically formed on both sides of the fixed cylinder, and a guide rod is provided on the push block, with the guide rod extending into the corresponding circumferential guide groove. The circumferential guide grooves allow the push block to move more effectively along the designed trajectory.

[0012] As an improvement, the movable cylinder is provided with a positioning boss. Using the positioning boss to position the curved surface product to be sewn at the sewing station can improve the accuracy of pushing, and enhance product quality and consistency.

[0013] As an improvement, the stitching clamping mechanism includes a second gripper drive device, a second drive connector, and a second clamping head assembly. The middle part of the second drive connector is hinged to the movable cylinder, one end of the second drive connector is hinged to the second extension rod of the second gripper drive device, and the second clamping head assembly is fixed to the other end of the second drive connector.

[0014] The advantages of this utility model compared with the prior art are:

[0015] This utility model discloses a clamping structure for an automatic sewing machine for curved products. The structure is rationally designed, featuring a pre-fixing station and a sewing station on the product liner assembly. The pre-fixing station includes a pre-fixing clamping mechanism with a centering mechanism. This mechanism pre-fixes the curved product to be sewn, which is conveyed from the material frame by the feeding mechanism to the pre-fixing station. The centering mechanism then centers the product. Finally, the pre-fixing clamping mechanism clamps and fixes the product at the pre-fixing station and axially conveys it to the sewing station. This clamping structure enables pre-fixing, centering, conveying of the curved product from the pre-fixing station to the sewing station, and fixing during sewing, thus automating the sewing process of curved products. This significantly improves production efficiency and product quality while reducing the workload of workers. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of section A in the middle;

[0018] Figure 3 This is a perspective view of another embodiment of the present utility model;

[0019] Figure 4 yes Figure 3 Enlarged view of section B;

[0020] Figure 5 yes Figure 3 Enlarged view of section C.

[0021] The names of the reference numerals in the accompanying drawings of this utility model are:

[0022] Frame 1, sewing machine head 2, fixed cylinder 3, axial guide groove 3a, circumferential guide groove 3b, movable cylinder 4, positioning boss 41, axial movement drive device 51, mounting bracket 52, push plate 53, first connecting rod 54, first gripper drive device 61, first extension rod 61a, first drive connector 62, first chuck assembly 63, centering drive device 71, moving block 71a, second connecting rod 72, push block 73, guide rod 73a, second gripper drive device 81, second extension rod 81a, second drive connector 82, second chuck assembly 83, pressing drive device 91, pressing plate 92. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings:

[0024] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0025] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0026] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0027] like Figures 1 to 5As shown, a clamping structure of an automatic sewing machine for curved products includes a frame 1, on which a sewing machine head 2 is fixed. A product liner assembly is mounted on the frame 1 below the sewing machine head 2. The product liner assembly includes a fixed cylinder 3 fixed to the frame 1. A movable cylinder 4 is fitted over the fixed cylinder 3. A pre-fixing station is provided on the fixed cylinder 3. A pre-fixing clamping mechanism that can move axially along the fixed cylinder 3 is provided on the pre-fixing station. The pre-fixing clamping mechanism is provided with a centering mechanism. A sewing station is provided at the position of the movable cylinder 4. A sewing clamping mechanism is provided on the movable cylinder 4. The pre-fixing clamping mechanism clamps and fixes the curved product and then axially transports it from the pre-fixing station to the sewing station.

[0028] The pre-fixed clamping mechanism includes an axial movement drive device 51, on which a mounting bracket 52 is connected. A push plate 53 is provided at the inner end of the mounting bracket 52, and pre-fixed grippers are provided on both sides of the mounting bracket 52. A downward pressure drive device 91 is also provided on the mounting bracket 52, and a downward pressure plate 92 is connected to the downward pressure drive device 91. The downward pressure drive device 91 is preferably a cylinder.

[0029] The pre-fixed gripper includes a first gripper drive device 61, a first drive connector 62, and a first chuck assembly 63. The middle part of the first drive connector 62 is hinged to the mounting bracket 52, one end of the first drive connector 62 is hinged to the first extension rod 61a of the first gripper drive device 61, and the first chuck assembly 63 is fixed to the other end of the first drive connector 62.

[0030] The first gripper drive device 61 is preferably a cylinder. When the first gripper drive device 61 is activated, it drives the first drive connector 62 to rotate around the hinge axis in the middle, thereby pressing down or lifting the first chuck assembly 63, thus achieving the clamping and fixing or releasing of the product.

[0031] The axial movement drive device 51 is disposed inside the fixed cylinder 3. The fixed cylinder 3 is provided with an axial guide groove 3a. The axial movement drive device 51 is connected to the mounting bracket 52 through a first connecting rod 54, which extends from the axial guide groove 3a. The axial guide groove 3a enables smoother and more stable axial movement of the mounting bracket 52, thereby ensuring the accuracy of product delivery.

[0032] The centering mechanism includes a centering drive device 71, a second connecting rod 72, and a push block 73. A moving block 71a is connected to the centering drive device 71, and the push block 73 is hinged to the fixed cylinder 3. The second connecting rod 72 is symmetrically arranged on both sides of the centering drive device 71. One end of the second connecting rod 72 is hinged to the moving block 71a, and the other end is hinged to the corresponding push block 73.

[0033] The centering drive device 71 is preferably a cylinder, which synchronously drives the push blocks 73 on both sides to move, thereby achieving the centering operation of the product. Working principle: When the centering drive device 71 is activated, it drives the moving block 71a to descend. The moving block 71a moves, and through the transmission of the second connecting rod 72, it drives the push block 73 to rotate around the hinge axis with the fixed cylinder 3, thereby causing the upper end of the push block 73 to move towards the center, thus achieving the centering operation of the product.

[0034] The fixed cylinder 3 has symmetrical circumferential guide grooves 3b on both sides, and the push block 73 is provided with a guide rod 73a, which extends into the corresponding circumferential guide groove 3b.

[0035] The movable cylinder 4 is provided with a positioning boss 41. After the pre-fixing clamping mechanism clamps and fixes the curved product, it is axially transported from the pre-fixing station to the sewing station. The positioning boss 41 is used to position the curved product to be sewn at the sewing station, which can improve the accuracy of pushing and improve product quality and consistency.

[0036] The stitching clamping mechanism includes a second gripper drive device 81, a second drive connector 82, and a second clamping head assembly 83. The middle part of the second drive connector 82 is hinged to the movable cylinder 4, one end of the second drive connector 82 is hinged to the second extension rod 81a of the second gripper drive device 81, and the second clamping head assembly 83 is fixed to the other end of the second drive connector 82.

[0037] The second gripper drive device 81 is preferably a cylinder. When the second gripper drive device 81 is activated, it drives the second drive connector 82 to rotate around the hinge axis in the middle, thereby pressing down or lifting the second chuck assembly 83, thus achieving the clamping and fixing or releasing of the product.

[0038] The automatic sewing machine for curved products uses a product liner assembly consisting of a fixed cylinder 3 and a movable cylinder 4 to match the curved surface of the product, so that the curved product does not need to be flattened during the sewing process, which can greatly improve sewing efficiency and sewing quality.

[0039] The working principle of the clamping structure of this automatic sewing machine for curved surface products:

[0040] The automatic sewing machine's feeding mechanism transfers the curved surface product to be sewn from the material frame to the pre-fixed station. The downward pressure drive device 91 moves the downward pressure plate 92 to pre-fix the product (at this time, the fixing force is small, and the product still undergoes circumferential position adjustment). The centering mechanism operates, with the centering drive device 71 driving the push block 73 to center the product. Then, the pre-fixed grippers operate, with the first gripper drive device 61 driving the first chuck assembly 63 to clamp and fix the product. Next, the axial movement drive device 51 starts, moving the mounting bracket 52 axially along with the clamped and fixed product to the sewing station. At the sewing station, the sewing clamping mechanism operates, with the second gripper drive device 81 driving the second chuck assembly 83 to clamp and fix the product.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping structure for an automatic sewing machine for curved products, comprising a frame (1), wherein a sewing machine head (2) is fixed on the frame (1), characterized in that: The frame (1) is equipped with a product liner assembly below the sewing machine head (2). The product liner assembly includes a fixed cylinder (3) fixed to the frame (1). The fixed cylinder (3) is covered with a movable cylinder (4). The fixed cylinder (3) is provided with a pre-fixing station. The pre-fixing station is provided with a pre-fixing clamping mechanism that can move along the axial direction of the fixed cylinder (3). The pre-fixing clamping mechanism is provided with a centering mechanism. The movable cylinder (4) is provided with a sewing station. The movable cylinder (4) is provided with a sewing clamping mechanism. The pre-fixing clamping mechanism clamps and fixes the curved product and then axially transports it from the pre-fixing station to the sewing station.

2. The clamping structure of an automatic sewing machine for curved surface products according to claim 1, characterized in that: The pre-fixed clamping mechanism includes an axial movement drive device (51), on which a mounting bracket (52) is connected. A push plate (53) is provided at the inner end of the mounting bracket (52), and pre-fixed clamping claws are provided on both sides of the mounting bracket (52). A downward pressure drive device (91) is also provided on the mounting bracket (52), and a downward pressure plate (92) is connected to the downward pressure drive device (91).

3. The clamping structure of an automatic sewing machine for curved surface products according to claim 2, characterized in that: The pre-fixed gripper includes a first gripper drive device (61), a first drive connector (62), and a first chuck assembly (63). The middle part of the first drive connector (62) is hinged to the mounting bracket (52), one end of the first drive connector (62) is hinged to the first extension rod (61a) of the first gripper drive device (61), and the first chuck assembly (63) is fixed to the other end of the first drive connector (62).

4. The clamping structure of an automatic sewing machine for curved surface products according to claim 3, characterized in that: The axial movement drive device (51) is disposed inside the fixed cylinder (3). The fixed cylinder (3) is provided with an axial guide groove (3a). The axial movement drive device (51) is connected to the mounting bracket (52) through a first connecting rod (54). The first connecting rod (54) extends out from the axial guide groove (3a).

5. The clamping structure of an automatic sewing machine for curved surface products according to claim 4, characterized in that: The centering mechanism includes a centering drive device (71), a second connecting rod (72), and a push block (73). A moving block (71a) is connected to the centering drive device (71). The push block (73) is hinged to the fixed cylinder (3). The second connecting rod (72) is symmetrically arranged on both sides of the centering drive device (71). One end of the second connecting rod (72) is hinged to the moving block (71a), and the other end is hinged to the corresponding push block (73).

6. The clamping structure of an automatic sewing machine for curved surface products according to claim 5, characterized in that: The fixed cylinder (3) has symmetrical circumferential guide grooves (3b) on both sides, and the push block (73) is provided with a guide rod (73a), which extends into the corresponding circumferential guide groove (3b).

7. The clamping structure of an automatic sewing machine for curved surface products according to claim 6, characterized in that: The movable cylinder (4) is provided with a positioning boss (41).

8. The clamping structure of an automatic sewing machine for curved surface products according to claim 7, characterized in that: The stitching clamping mechanism includes a second gripper drive device (81), a second drive connector (82), and a second clamping head assembly (83). The middle part of the second drive connector (82) is hinged to the movable cylinder (4), one end of the second drive connector (82) is hinged to the second extension rod (81a) of the second gripper drive device (81), and the second clamping head assembly (83) is fixed to the other end of the second drive connector (82).

Images