Magnetic chuck for sewing automobile air bags

Abstract

The utility model relates to the field of automobile safety air bag's production provides a kind of for the sewing of automobile safety air bag and is attracted to magnetic type fixture, by opening clamp lower bottom plate and clamp upper clamping plate, air bag is placed between clamp lower bottom plate and clamp upper clamping plate, ejection plate, clamp lower bottom plate and clamp upper clamping plate are used for the sewing of sewing machine through sewing hole, clamp lower bottom plate and clamp upper clamping plate are respectively set around the lower magnetic unit and the upper magnetic unit of opposite magnetism of sewing hole, so that clamp lower bottom plate and clamp upper clamping plate are strongly adsorbed together by lower magnetic unit and upper magnetic unit, to guarantee the clamping of air bag, so that multiple magnetic units arranged around the sewing hole avoid the problem that the adsorption force of single magnet center is too strong and the edge is too weak, realize the uniform distribution of pressure on the whole clamping surface;And be provided with the positioning of first positioning mechanism to clamp lower bottom plate and clamp upper clamping plate opening and closing.

Description

Technical Field

[0001] This utility model relates to the field of automobile airbag manufacturing, and in particular to a magnetic clamp for sewing automobile airbags. Background Technology

[0002] In the sewing of automotive safety components such as seat belts and airbags, the precision and consistency of the sewing trajectory are required to be extremely high, and existing technologies have significant shortcomings: Currently, most automatic sewing machines use fixed, dedicated clamps. These clamps are designed for specific products and lack flexibility. When producing different models or batches of workpieces, the machine needs to be stopped and the entire clamp replaced, which is cumbersome and time-consuming, severely restricting production efficiency. Furthermore, fixed clamps do not adequately consider the ease of operation for the operator when clamping cut pieces. Moreover, the tightness of the clamps is extremely important; the sewing thread trajectory must strictly follow the designed path. Any deviation may cause uneven pressure or even tearing of the air bag during deployment.

[0003] However, existing technologies often employ vacuum adsorption platforms or complex mechanical clamps, but these suffer from high equipment costs, poor flexibility, and complex maintenance. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a magnetic clamp for sewing automotive airbags, which solves the problems in the background art.

[0005] Based on the above objectives, this utility model provides a magnetic clamp for sewing automotive airbags, including an ejector plate fixed to the top of the sewing machine operating table, a clamp lower base plate provided on the top of the ejector plate, a clamp fixing plate provided on one side of the top of the clamp lower base plate, and the clamp fixing plate being rotatably connected to the clamp upper clamp plate through a rotating mechanism, and the clamp upper clamp plate performing opening and closing movements on the clamp lower base plate. The ejector plate, the lower base plate of the clamp, and the upper clamping plate of the clamp are all provided with multiple sewing holes in the middle, and the sewing holes of the three are arranged vertically and continuously. The bottom of the upper clamping plate is provided with upper magnetic unit mounting slots around the sewing holes to install upper magnetic units, and the top of the lower base plate is provided with lower magnetic unit mounting slots around the sewing holes to install lower magnetic units. The upper and lower magnetic units have opposite magnetic properties. The lower base plate and the upper clamping plate of the clamp are made of non-ferromagnetic material. The lower base plate and upper clamping plate of the fixture are provided with a first positioning mechanism for opening and closing positioning of the two.

[0006] Preferably, the rotating mechanism includes C-shaped connecting blocks disposed on both sides of the top of the clamp fixing plate, and a rotating shaft matching the C-shaped connecting blocks is disposed on one side of the clamping plate of the clamp, and the rotating shaft is rotatably connected to the C-shaped connecting blocks.

[0007] Preferably, the first positioning mechanism includes a positioning pin disposed on the top of the lower base plate of the fixture, the positioning pin matching the positioning hole on the air bag, and a positioning pin hole for the positioning pin to pass through is provided on the upper clamping plate of the fixture.

[0008] Preferably, a second positioning mechanism is provided below the top plate, which is driven to rise and fall by a cylinder. The second positioning mechanism extends into the sewing hole for positioning. The second positioning mechanism is located inside the sewing machine operating table, and the cylinder is also located inside the sewing machine operating table. The second positioning mechanism includes a lifting plate provided at the top output end of the cylinder. The top of the lifting plate has a positioning post that matches the sewing hole. The positioning post rises and slides through the sewing machine operating table and inserts into the sewing hole for positioning.

[0009] Preferably, the surfaces of the lower base plate and the upper clamping plate of the clamp that contact the air bag are covered with a flexible protective layer.

[0010] Preferably, the flexible protective layer is a silicone pad, a polyurethane pad, or a fine fleece layer, which is adhered to the upper surface of the lower base plate of the fixture and around the sewing holes on the lower surface of the upper clamping plate of the fixture.

[0011] Preferably, the clamp plate of the fixture is provided with a handle.

[0012] Preferably, one of the upper magnetic unit and the lower magnetic unit is a permanent magnet, and the other is a permanent magnet or a magnetic core.

[0013] Preferably, the lower surface of the fixture's bottom plate is covered with an antistatic film.

[0014] The beneficial effects of this utility model are as follows: The upper clamping plate of this utility model is rotatably connected to the C-shaped connecting block of the clamping fixing plate via a rotating shaft, thereby achieving the opening and closing of the lower clamping plate. The upper clamping plate is operated by a handle, opening the lower clamping plate and the upper clamping plate, placing an air bag between the lower clamping plate and the upper clamping plate, and using the ejector plate, the lower clamping plate, and the upper clamping plate for sewing through the sewing hole. The lower clamping plate and the upper clamping plate are respectively provided with lower magnetic units and upper magnetic units with opposite magnetic properties around the sewing hole, thus enabling the lower clamping plate and the upper clamping plate to open and close. The upper clamping plate is strongly attracted together by the lower and upper magnetic units, thus ensuring the clamping of the air bag. In this way, multiple magnetic units arranged around the sewing hole avoid the problem of excessively strong attraction at the center and weak attraction at the edges of a single magnet, achieving uniform pressure distribution across the entire clamping surface. Furthermore, a first positioning mechanism is provided to position the lower base plate and the upper clamping plate of the clamp when they open and close. The first positioning mechanism achieves the positioning of the air bag, the lower base plate, and the upper clamping plate by passing the positioning pin of the lower base plate through the positioning hole of the air bag and the positioning pin hole of the upper clamping plate.

[0015] The second positioning mechanism, driven by a cylinder, raises and lowers the lifting plate. The positioning pin of the lifting plate slides through the sewing machine operating table and extends into the sewing hole, thereby accurately positioning the sewing holes of the top plate, the lower base plate of the clamp, and the upper clamp plate of the clamp, as well as the other positioning holes of the air bag, to ensure the accuracy of sewing.

[0016] The surfaces of the lower base plate and upper clamping plate of the clamp that come into contact with the air bag are covered with a flexible protective layer. The flexible protective layer can increase friction and prevent the smooth fabric from sliding. The flexible protective layer can also distribute pressure and avoid local indentations. The flexible protective layer can also physically isolate and protect the fabric surface and fix the magnetic unit.

[0017] The lower magnetic unit and the upper magnetic unit are respectively a permanent magnet and a permanent magnet or magnetic core, ensuring strong clamping force even when there is a gap in the fabric.

[0018] The lower surface of the fixture's base plate is covered with an anti-static film to prevent static electricity from being generated due to friction during high-speed sewing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an exploded view of the present invention; Figure 2 This is an overall schematic diagram of the present invention; Figure 3 This is a top view of the bottom plate of the fixture; Figure 4 It is a bottom view of the clamping plate on the fixture; Figure 5 This is a schematic diagram of the inside of a sewing machine's control panel.

[0021] The diagram is marked as follows: 1-Top plate, 2-Lower base plate of clamp, 3-Clamp fixing plate, 4-Upper clamp plate of clamp, 5-Sewing hole, 6-Upper magnetic unit mounting slot, 7-Lower magnetic unit mounting slot, 8-C-type connecting block, 9-Rotating shaft, 10-Positioning pin, 11-Positioning pin hole, 12-Lifting plate, 13-Positioning column, 14-Handle, 15-Sewing machine operating table, 16-Cylinder. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figures 1 to 5 As shown, a magnetic clamp for sewing automotive airbags includes an ejector plate 1 fixed to the top of a sewing machine operating table 15. A lower clamp base plate 2 is located on the top of the ejector plate 1. A clamp fixing plate 3 is located on one side of the top of the lower clamp base plate 2. The clamp fixing plate 3 is rotatably connected to an upper clamp plate 4 via a rotating mechanism. A handle 14 is provided on the upper clamp plate 4. The rotating mechanism includes C-shaped connecting blocks 8 located on both sides of the top of the clamp fixing plate 3. A rotating shaft 9 matching the C-shaped connecting blocks 8 is located on one side of the upper clamp plate 4. The rotating shaft 9 is rotatably connected to the C-shaped connecting blocks 8. 4. The clamping lower base plate 2 performs an opening and closing motion; multiple sewing holes 5 are provided in the middle of the ejector plate 1, the clamping lower base plate 2, and the clamping upper plate 4, and the sewing holes 5 of the three are arranged vertically and vertically; the clamping upper plate 4 is rotatably connected to the clamping fixed plate 3 via the rotating shaft 9 to achieve opening and closing with the clamping lower base plate 2. The clamping upper plate 4 is operated by the handle 14, which opens the clamping lower base plate 2 and the clamping upper plate 4, and places the air bag between the clamping lower base plate 2 and the clamping upper plate 4. The ejector plate 1, the clamping lower base plate 2, and the clamping upper plate 4 are used for sewing by the sewing machine through the sewing holes 5.

[0025] The bottom of the upper clamping plate 4 of the clamp is provided with upper magnetic unit mounting slots 6 around the sewing hole 5 to install the upper magnetic unit, and the top of the lower clamping plate 2 is provided with lower magnetic unit mounting slots 7 around the sewing hole 5 to install the lower magnetic unit. The upper and lower magnetic units have opposite magnetic properties. The lower clamping plate 2 and the upper clamping plate 4 of the clamp are made of non-ferromagnetic material, specifically high-strength acrylic plates. The lower clamping plate 2 and the upper clamping plate 4 of the clamp are provided with a first positioning mechanism for opening and closing positioning of the two. The first positioning mechanism includes a positioning pin 10 provided on the top of the lower clamping plate 2. The positioning pin 10 matches the positioning hole on the air bag. The upper clamping plate 4 of the clamp is provided with a positioning pin hole 11 for the positioning pin 10 to pass through. The lower base plate 2 and the upper clamping plate 4 of the clamp are respectively provided with lower magnetic units and upper magnetic units with opposite magnetic properties around the sewing hole 5. In this way, the lower base plate 2 and the upper clamping plate 4 of the clamp are strongly attracted together by the lower magnetic units and the upper magnetic units, thereby ensuring the clamping of the air bag. In this way, multiple magnetic units arranged around the sewing hole avoid the problem of excessively strong attraction force at the center of a single magnet and insufficient attraction force at the edges, and achieve uniform pressure distribution on the entire clamping surface. Furthermore, a first positioning mechanism is provided to position the lower base plate 2 and the upper clamping plate 4 when they open and close. The first positioning mechanism achieves the positioning of the air bag, the lower base plate 2, and the upper clamping plate 4 by the positioning pin 10 of the lower base plate 2 passing through the positioning hole of the air bag and the positioning pin hole 11 of the upper clamping plate 4.

[0026] Below the ejector plate 1, a second positioning mechanism is provided, which is lifted and lowered by a cylinder 16. The second positioning mechanism extends into the sewing hole 5 for positioning. The second positioning mechanism is located inside the sewing machine operating table 15, and the cylinder 16 is also located inside the sewing machine operating table. The second positioning mechanism includes a lifting plate 12 located at the top output end of the cylinder 16. The top of the lifting plate 12 has a positioning post 13 that matches the sewing hole 5. The surface of the sewing machine operating table 15 has a through hole for the positioning post 13 to pass through. The positioning post 13 rises and slides through the sewing machine operating table 15 and inserts into the sewing hole 5 for positioning. By setting the second positioning mechanism, which is lifted and lowered by the cylinder 16, the lifting plate 12 is lifted and lowered. The positioning post 13 of the lifting plate 12 slides through the sewing machine operating table and extends into the sewing hole 5, thereby accurately positioning the sewing holes 5 of the ejector plate 1, the lower base plate 2 of the clamp, and the upper clamp plate 4 of the clamp, as well as the other positioning holes of the air bag, to ensure the accuracy of sewing.

[0027] The surfaces of the lower base plate 2 and the upper clamping plate 4 of the clamp that contact the air bag are both covered with a flexible protective layer. This flexible protective layer is a silicone pad, a polyurethane pad, or a layer of fine fleece, and is adhered to the upper surface of the lower base plate 2 and the lower surface of the upper clamping plate 4 around the sewing holes 5. The flexible protective layer increases friction, preventing the smooth fabric from slipping. It also disperses pressure, avoiding localized indentations. Furthermore, the flexible protective layer provides physical insulation, protecting the fabric surface and securing the magnetic unit.

[0028] One of the upper magnetic unit and the lower magnetic unit is a permanent magnet, and the other is a permanent magnet or a magnetic core. The permanent magnet is neodymium iron boron N35 / N52, which ensures a strong clamping force even when there is a gap in the fabric.

[0029] The lower surface of the fixture bottom plate 2 is covered with an antistatic film to prevent static electricity from being generated due to friction during high-speed sewing.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic suction type fixture for sewing of automobile airbag, comprising a knock-out plate (1) fixed on the top of the operating table of the sewing machine, characterized in that, The top of the ejector plate (1) is provided with a clamp lower base plate (2), and a clamp fixing plate (3) is provided on one side of the top of the clamp lower base plate (2). The clamp fixing plate (3) is rotatably connected to the clamp upper clamp plate (4) through a rotating mechanism. The clamp upper clamp plate (4) performs opening and closing movements on the clamp lower base plate (2). Multiple sewing holes (5) are provided in the middle of the ejector plate (1), the lower base plate (2) of the fixture, and the upper clamping plate (4) of the fixture. The sewing holes (5) of the three are arranged vertically and vertically. The bottom of the upper clamping plate (4) is provided with upper magnetic unit mounting slots (6) around the sewing holes (5) to install the upper magnetic unit. The top of the lower base plate (2) is provided with lower magnetic unit mounting slots (7) around the sewing holes (5) to install the lower magnetic unit. The upper magnetic unit and the lower magnetic unit have opposite magnetic properties. The lower base plate (2) and the upper clamping plate (4) of the fixture are made of non-ferromagnetic material. The lower base plate (2) and the upper clamping plate (4) of the clamp are provided with a first positioning mechanism for opening and closing positioning of the two.

2. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein The rotating mechanism includes C-shaped connecting blocks (8) on both sides of the top of the clamp fixing plate (3), and a rotating shaft (9) matching the C-shaped connecting blocks (8) is provided on one side of the clamping plate (4) of the clamp. The rotating shaft (9) is rotatably connected to the C-shaped connecting blocks (8).

3. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein The first positioning mechanism includes a positioning pin (10) set on the top of the lower base plate (2) of the fixture. The positioning pin (10) matches the positioning hole on the air bag. The upper clamping plate (4) of the fixture is provided with a positioning pin hole (11) for the positioning pin (10) to pass through.

4. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein Below the top plate (1) is a second positioning mechanism that is driven to rise and fall by a cylinder. The second positioning mechanism extends into the sewing hole (5) for positioning. The second positioning mechanism is located inside the sewing machine operating table, and the cylinder is also located inside the sewing machine operating table. The second positioning mechanism includes a lifting plate (12) set at the top output end of the cylinder. The top of the lifting plate (12) has a positioning post (13) that matches the sewing hole (5). The positioning post (13) rises and slides through the sewing machine operating table and inserts into the sewing hole (5) and another positioning hole of the air bag for positioning.

5. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein The surfaces of the lower base plate (2) and upper clamping plate (4) of the clamp that come into contact with the air bag are covered with a flexible protective layer.

6. The magnetic chuck for sewing of automobile air bag according to claim 5, wherein The flexible protective layer is a silicone pad, a polyurethane pad, or a fine velvet layer, which is adhered to the upper surface of the lower base plate (2) of the fixture and around the sewing holes (5) on the lower surface of the upper clamping plate (4) of the fixture.

7. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein The clamp plate (4) of the fixture is provided with a handle (14).

8. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein One of the upper magnetic unit and the lower magnetic unit is a permanent magnet, and the other is a permanent magnet or a magnetic core.

9. The magnetic chuck for sewing of automobile air bag according to claim 1, wherein The lower surface of the fixture bottom plate (2) is covered with an antistatic film.

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