Automobile leather sewing angle device

Abstract

The application relates to the technical field of sewing pressure angle, in particular to an automobile leather sewing pressure angle device, which comprises a presser foot main body, a chromium-plated main presser foot, a side position auxiliary pressure angle, a presser foot screw rod, a thrust bearing, a movable push piece and a hemming assembly. The automobile leather sewing pressure angle device of the application realizes synchronous pressing of the edges of the folded double-layer leather through the synergistic effect of the chromium-plated main presser foot and the double-side adjustable auxiliary pressure angle. The auxiliary pressure angle adopts a telescopic rod and compression spring combined structure, the pressure can be self-adaptively adjusted according to the thickness of the leather, and the uniform pressing force can be ensured during the sewing process; in addition, the hemming assembly composed of a rotary square plate and a sliding sheet realizes motion conversion through a skew gear transmission, replaces the traditional manual pre-hemming process, and the limiting groove of the sliding sheet moving path cooperates with the spring clamp, so that the uniformity of the hemming width is ensured, and the needle impact accident caused by excessive feeding is prevented.

Description

Technical Field

[0001] This application relates to the field of sewing corner pressing technology, and in particular to a sewing corner pressing device for automotive leather. Background Technology

[0002] Leather is an animal product that has undergone physical and chemical processing such as hair removal and tanning, resulting in a material that is denatured and not easily perishable. Leather is composed of natural protein fibers tightly woven in three-dimensional space, and its surface has a special grain layer with natural grain and luster, and a comfortable feel.

[0003] A search revealed that CN222499187U discloses a leather sewing corner pressing device for automobiles. By activating a transmission cylinder, the transmission shaft frame is pushed upward, which in turn transmits power to the lifting support plate and the lifting platform. This allows the lifting support plate to lift the lifting platform, which in turn lifts the processing table. The height of the processing table from the ground can be adjusted by an adjustment device, allowing workers to place the leather on the processing table at a lower position, thereby reducing the labor intensity of the workers.

[0004] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist and need to be improved: the aforementioned device only achieves a single pressing effect. However, some leather fabrics or specific sewing requirements require the fabric to be folded in half before edge locking. Traditional presser feet can only press a single layer and cannot effectively fix the double-layered edges after folding. If the folded part is forcibly stuffed under the presser foot, it may cause the machine needle to hit the presser foot or skip stitches. Utility Model Content

[0005] This application provides a corner pressing device for automotive leather sewing to improve the following technical problems: the above-mentioned device only plays a single corner pressing effect. However, some leather fabrics or specific sewing requirements require the fabric to be folded in half before edge locking. Traditional presser feet can only press a single layer and cannot effectively fix the double-layered edges after folding. If the folded part is forcibly stuffed under the presser foot, it may cause the needle to hit the presser foot or skip stitches.

[0006] This application provides a corner-pressing device for automotive leather sewing, employing the following technical solution:

[0007] A leather sewing corner pressing device for automobiles includes a presser foot body, a chrome-plated main presser foot, a side auxiliary presser foot, a presser foot screw, a thrust bearing, a movable lever, and a folding assembly. The top of the chrome-plated main presser foot is fixedly connected to the bottom of the thrust bearing, and the top of the thrust bearing is rotatably connected to the bottom of the presser foot screw. The presser foot screw is threaded to the outside of the presser foot body. The side auxiliary presser foot is movably connected to both sides of the presser foot body located on the chrome-plated main presser foot. One side of the movable lever is slidably connected to the folding assembly, and the folding assembly is installed on one side of the presser foot body.

[0008] The chrome-plated main presser foot is chrome-hardened to reduce friction with the leather and prevent scratches. The main body of the presser foot is used to connect to the sewing machine body. The side auxiliary presser angles are located on both sides of the chrome-plated main presser foot and are used to fix the folded leather edge. The thrust bearing is used to convert the rotational motion of the presser foot screw into vertical pressure to ensure that the chrome-plated main presser foot presses down smoothly and avoids deflection. The movable lever works with the folding assembly to replace manual pre-folding and realize automated folding.

[0009] In one feasible technical solution of this application, the folding assembly includes a rotating handle, a guide rod, a rotating square plate, a slider, and a handle screw. The rotating handle is rotatably connected to the bottom outer side of the presser foot body, the guide rod is rotatably connected to the inner side of the presser foot body, one side of the rotating square plate is fixedly connected to one end of the guide rod, the slider is slidably connected to the inner side of the rotating square plate, and the handle screw is installed on the inner side of the rotating square plate, with the outer side of the threaded surface of the handle screw being screwed to the slider.

[0010] In one feasible technical solution of this application, the top of the movable paddle is further provided with a spring clip for clamping the folded edge.

[0011] In one feasible technical solution of this application, a limiting groove for restricting the movement path of the slider is also provided on the inner side of the rotating square plate.

[0012] In one feasible technical solution of this application, the opposite sides of the rotary handle and the guide rod are further provided with meshing non-meshing gears.

[0013] In one feasible technical solution of this application, a compression spring is fitted on the top of both the chrome-plated main pressure foot and the side auxiliary pressure angle.

[0014] In one feasible technical solution of this application, a telescopic rod is further provided at the top of the side auxiliary pressure angle, and the telescopic rod is sleeved on the inner side of the compression spring.

[0015] In one feasible technical solution of this application, a through hole is provided inside the chrome-plated main pressure foot.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] This device achieves synchronous pressing of the edges of folded double-layered leather through the synergistic action of a chrome-plated main presser foot and dual adjustable secondary presser angles. The secondary presser angles employ a combination of a telescopic rod and a compression spring, which can adaptively adjust the pressure according to the leather thickness, avoiding the shifting of the folded edges caused by traditional single-layer pressing. The compression springs at the top of the main and secondary presser feet automatically compensate for pressure loss when the sewing machine needle rises, ensuring uniform pressure throughout the sewing process. In addition, the folding assembly, composed of a rotating square plate and a slider, achieves motion conversion through a gear transmission, replacing the traditional manual pre-folding process. The limiting groove of the slider's movement path, combined with a spring clip, ensures consistent folding width and prevents needle impact accidents caused by excessive feeding. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the automotive leather sewing corner pressing device according to an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the bottom structure of the presser foot body in an embodiment of this application.

[0021] Figure 3 This is a distribution diagram of the folding components in the embodiments of this application.

[0022] Figure 4 This is a schematic diagram of the structure of the movable paddle in the embodiments of this application.

[0023] Figure 5 yes Figure 3 Enlarged view of part A in the middle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Presser foot body; 2. Chrome-plated main presser foot; 3. Side auxiliary presser foot; 4. Presser foot screw; 5. Thrust bearing; 6. Movable lever;

[0026] 7. Folding assembly; 71. Rotating handle lever; 72. Guide rod; 73. Rotating square plate; 74. Sliding piece; 75. Handle screw;

[0027] 8. Spring clip; 9. Limiting groove; 10. Gear with different surfaces; 11. Compression spring; 12. Telescopic rod; 13. Threading hole. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0031] This application discloses a corner-pressing device for automotive leather sewing. (Refer to...) Figures 1 to 5 The automotive leather sewing corner pressing device includes a presser foot body 1, a chrome-plated main presser foot 2, a side auxiliary presser foot 3, a presser foot screw 4, a thrust bearing 5, a movable lever 6, and a folding assembly 7. The top of the chrome-plated main presser foot 2 is fixedly connected to the bottom of the thrust bearing 5, and the top of the thrust bearing 5 is rotatably connected to the bottom of the presser foot screw 4. The presser foot screw 4 is threadedly connected to the outside of the presser foot body 1. The side auxiliary presser foot 3 is movably connected to both sides of the presser foot body 1 located on the chrome-plated main presser foot 2. One side of the movable lever 6 is slidably connected to the folding assembly 7, and the folding assembly 7 is installed on one side of the presser foot body 1.

[0032] The chrome-plated main presser foot 2 is chrome-plated and hardened to reduce friction with the leather and prevent scratches on the surface. The presser foot body 1 is used to connect to the sewing machine body. The side auxiliary presser feet 3 are located on both sides of the chrome-plated main presser foot 2 and are used to fix the folded leather edge. The thrust bearing 5 is used to convert the rotational motion of the presser foot screw 4 into vertical pressure to ensure that the chrome-plated main presser foot 2 presses down smoothly and avoids tilting. The movable lever 6 works with the folding assembly 7 to replace manual pre-folding and realize automated folding.

[0033] The folding assembly 7 includes a rotating handle 71, a guide rod 72, a rotating square plate 73, a sliding piece 74, and a handle screw 75. The rotating handle 71 is rotatably connected to the bottom outer side of the presser foot body 1, the guide rod 72 is rotatably connected to the inner side of the presser foot body 1, one side of the rotating square plate 73 is fixedly connected to one end of the guide rod 72, the sliding piece 74 is slidably connected to the inner side of the rotating square plate 73, and the handle screw 75 is installed on the inner side of the rotating square plate 73, and the outer side of the threaded surface of the handle screw 75 is screwed to the sliding piece 74.

[0034] The top of the movable lever 6 is also equipped with a spring clip 8 for clamping the folded edge.

[0035] The inner side of the rotating square plate 73 is also provided with a limiting groove 9 for restricting the movement path of the slider 74.

[0036] The opposite sides of the rotating handle lever 71 and guide rod 72 are also provided with meshing non-uniform gears 10.

[0037] Compression springs 11 are fitted on the top of both the chrome-plated main pressure foot 2 and the side auxiliary pressure angle 3.

[0038] A telescopic rod 12 is also provided at the top of the side auxiliary pressure angle 3, and the telescopic rod 12 is sleeved on the inside of the compression spring 11.

[0039] The chrome-plated main pressure foot 2 has a through hole 13.

[0040] The usage process of the automotive leather sewing corner pressing device according to this application embodiment is roughly as follows:

[0041] The presser foot body 1 is mounted on the sewing machine head via a standard interface, ensuring stability and preventing wobbling. The presser foot screw 4 rotates to adjust the initial height of the chrome-plated main presser foot 2 to accommodate different leather thicknesses. The side auxiliary presser angle 3 automatically adapts to the thickness of the leather layers via the telescopic rod 12 and compression spring 11, ensuring balanced pressure on both sides. During hemming, rotating the handle screw 75 adjusts the position of the slide 74 and movable paddle 6, bringing them closer to the fabric. This allows the bottom surface of the inclined end of the movable paddle 6 to cut under the fabric. Rotating the handle rod 71 180° drives the guide rod 72 to rotate via the non-uniform gear 10, causing the rotating square plate 73 to swing. The movable paddle 6, in conjunction with the spring clip 8, clamps the hem, automatically folding the leather edge to ensure it doesn't loosen during sewing. The chrome-plated main presser foot 2 converts the rotational pressure of the presser foot screw 4 into vertical downward pressure via the thrust bearing 5, preventing skewing. When the sewing machine needle descends, the compression spring 11 dynamically compensates for the pressure, preventing misalignment between leather layers.

[0042] The beneficial technical effects of the automotive leather sewing corner pressing device according to the embodiments of this application are roughly as follows:

[0043] This device achieves synchronous pressing of the double-layered leather edge after folding through the synergistic action of the chrome-plated main presser foot 2 and the dual-sided adjustable secondary presser angles. The secondary presser angles adopt a combination structure of telescopic rod 12 and compression spring 11, which can adaptively adjust the pressure according to the leather thickness, avoiding the displacement of the folded edge caused by traditional single-layer pressing. The compression spring 11 at the top of the main and secondary presser feet automatically compensates for pressure loss when the sewing machine needle rises, ensuring that the pressure is always uniform during the sewing process. In addition, the folding assembly 7, which consists of rotating square plate 73 and slider 74, achieves motion conversion through the transmission of non-faceted gear 10, replacing the traditional manual pre-folding process. The limiting groove 9 of the slider 74's movement path, in conjunction with the spring clip 8, ensures the consistency of the folded width and prevents needle impact accidents caused by excessive feeding.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A leather sewing corner pressing device for automobiles, characterized in that, The device includes a presser foot body (1), a chrome-plated main presser foot (2), a side auxiliary presser angle (3), a presser foot screw (4), a thrust bearing (5), a movable lever (6), and a folding assembly (7). The top of the chrome-plated main presser foot (2) is fixedly connected to the bottom of the thrust bearing (5), and the top of the thrust bearing (5) is rotatably connected to the bottom of the presser foot screw (4). The presser foot screw (4) is threaded to the outside of the presser foot body (1). The side auxiliary presser angle (3) is movably connected to the presser foot body (1) on both sides of the chrome-plated main presser foot (2). One side of the movable lever (6) is slidably connected to the folding assembly (7). The folding assembly (7) is installed on one side of the presser foot body (1). The chrome-plated main presser foot (2) is chrome-plated and hardened to reduce friction with the leather and prevent scratches on the surface. The presser foot body (1) is used to connect to the sewing machine body. The side auxiliary presser angle (3) is located on both sides of the chrome-plated main presser foot (2) and is used to fix the folded leather edge. The thrust bearing (5) is used to convert the rotational motion of the presser foot screw (4) into vertical pressure to ensure that the chrome-plated main presser foot (2) presses down smoothly and avoids deflection. The movable paddle (6) works with the folding assembly (7) to replace manual pre-folding and realize automated folding.

2. The automotive leather sewing corner pressing device according to claim 1, characterized in that, The folding assembly (7) includes a rotating handle (71), a guide rod (72), a rotating square plate (73), a sliding piece (74), and a handle screw (75). The rotating handle (71) is rotatably connected to the bottom outer side of the presser foot body (1). The guide rod (72) is rotatably connected to the inner side of the presser foot body (1). One side of the rotating square plate (73) is fixedly connected to one end of the guide rod (72). The sliding piece (74) is slidably connected to the inner side of the rotating square plate (73). The handle screw (75) is installed on the inner side of the rotating square plate (73), and the outer side of the threaded surface of the handle screw (75) is screwed to the sliding piece (74).

3. The automotive leather sewing corner pressing device according to claim 1, characterized in that, The top of the movable paddle (6) is also provided with a spring clip (8) for clamping the folded edge.

4. The automotive leather sewing corner pressing device according to claim 2, characterized in that, The inner side of the rotating square plate (73) is also provided with a limiting groove (9) for restricting the movement path of the slider (74).

5. The automotive leather sewing corner pressing device according to claim 2, characterized in that, The rotating handle (71) and the guide rod (72) are also provided with meshing eccentric gears (10) on opposite sides.

6. The automotive leather sewing corner pressing device according to claim 1, characterized in that, Compression springs (11) are fitted on the top of both the chrome-plated main pressure foot (2) and the side auxiliary pressure angle (3).

7. The automotive leather sewing corner pressing device according to claim 6, characterized in that, The top of the side pressure angle (3) is also provided with a telescopic rod (12), which is sleeved on the inside of the compression spring (11).

8. The automotive leather sewing corner pressing device according to claim 1, characterized in that, The chrome-plated main pressure foot (2) has a through hole (13) inside.

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