Thin-wall heat insulation structure of automobile catalyst

Abstract

The utility model discloses a thin-wall heat insulation structure of an automobile catalytic converter, which relates to the field of automobile exhaust systems and comprises a heat insulation cover and heat insulation cotton, the heat insulation cover comprises a heat insulation cover I and a heat insulation cover II which are welded with each other, the heat insulation cover is formed by stamping a 0.15 mm stainless steel particle plate, and the edges of the heat insulation cover I and the heat insulation cover II extend outwards to form turnups. A plurality of welding areas in one-to-one correspondence are arranged on the turned-over edge, so that automatic welding combination is realized; the heat insulation cotton is fixed to the inner surfaces of the first heat insulation cover and the second heat insulation cover through connecting nails. According to the utility model, by adopting the thin plate material, optimizing the structural design and the automatic welding technology, the weight of the heat shield is obviously reduced, and the light weight level of an automobile is improved. Meanwhile, manual operation is reduced, production cost is reduced, and production efficiency and safety are improved. The novel heat insulation material fixing mode avoids the problems that glue is prone to falling off and peculiar smells exist, the stability and durability of the heat insulation cover are enhanced, and the heat preservation and heat insulation performance of the catalyst carrier is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile exhaust systems, in particular to a thin-wall heat insulation structure of an automobile catalyst. Background Art

[0002] As the country's emphasis on environmental protection continues to increase, the control standards for automobile emission pollutants are becoming increasingly stringent. In particular, to meet the National VI emission standards, automobile manufacturers must upgrade and modify emission devices to reduce the pollution of exhaust emissions to the environment. In this process, the external insulation protection parts of traditional automobile catalytic converter devices have some shortcomings:

[0003] Current thermal insulation shields are usually stamped from thick plates and are divided into two pieces, upper and lower. Additional welding of mounting brackets is required to secure the heat shield, and bolts and nuts are used to assemble and tighten the shield with the main body mounting bracket. This assembly method is labor-intensive, time-consuming, and prone to errors. Problems such as missing installation and insufficient tightening force may cause the product to make unusual noises or fall off, affecting driving safety. In addition, the thickness of existing product materials is mostly over 1.2mm, resulting in a large amount of material and heavy weight, which runs counter to the trend of lightweighting the entire vehicle and is not conducive to improving the fuel efficiency and performance of the vehicle. The thermal insulation cotton material used inside the existing stamped heat shield needs to be bonded with glue. This material is easy to fall off, burn, and may produce odors, posing safety hazards and environmental problems.

[0004] In summary, the existing technology has many problems in the structural design, material selection, installation and fixing methods of thermal insulation protection devices. These problems need to be solved through technological innovation to meet more stringent environmental protection requirements and market demand for lightweight. Utility Model Content

[0005] The purpose of the utility model is to provide a thin-wall heat-insulating structure for an automobile catalyst, so as to solve the above-mentioned technical problems existing in the prior art.

[0006] To improve fuel efficiency and performance, the weight of the entire vehicle must be reduced. This requires lightweighting the thermal insulation components of the catalyst carrier while maintaining performance. At the same time, to enhance the chemical reaction efficiency of the catalyst carrier, higher requirements must be placed on the thermal insulation components to ensure efficient operation of the catalyst under various operating conditions. Therefore, this utility model aims to optimize and improve these issues. Through innovative design and material selection, a new thermal insulation protection structure is developed to meet stricter environmental standards while improving the fuel efficiency and performance of the vehicle.

[0007] To achieve the above-mentioned purpose, the present invention provides the following solution: a thin-walled heat-insulating structure for an automobile catalyst, comprising:

[0008] The heat shield 1 is stamped and formed using 0.15mm stainless steel particle board. The edge of the heat shield 1 extends outward with a flange, and multiple welding areas are provided on the flange;

[0009] Heat shield 2; made of the same material and formed in the same manner as heat shield 1, with a flange extending outward from the edge of heat shield 2 and provided with a plurality of welding areas corresponding one-to-one with the welding areas on heat shield 1; heat shield 2 is welded to heat shield 1;

[0010] The heat insulation cotton is fixed to the inner surfaces of the first heat insulation cover and the second heat insulation cover by connecting nails and / or high-temperature resistant adhesive.

[0011] In some optional implementations of the present invention, at least one welding area is provided on each direction of the first heat shield and the second heat shield.

[0012] In some optional implementations of the present invention, eight welding areas are provided on the edges of the first heat shield and the second heat shield.

[0013] In some optional implementations of the present invention, the welding area is 25.5 mm to 40 mm long and 10 mm to 12 mm wide.

[0014] In some optional implementations of the present invention, the first heat insulation cover and the second heat insulation cover are both provided with a plurality of heat insulation cotton fixing points for driving connecting nails, and the heat insulation cotton fixing points are in a stamped concave shape.

[0015] In some optional implementations of the present invention, the connecting nails are shaped like an outward splayed shape and penetrate the first heat insulation cover or the second heat insulation cover and then extend into the heat insulation cotton to secure the connection.

[0016] In some optional implementations of the present invention, the thermal insulation cotton is 50 mm away from the boundary of the first thermal insulation cover or the second thermal insulation cover.

[0017] In some optional implementations of the present invention, the thermal insulation cotton is made of high-silica glass fiber or aluminum silicate with a thickness of 8 mm.

[0018] In some optional implementations of the present invention, the long-term high temperature resistance of the thermal insulation cotton is not less than 850°C.

[0019] The utility model discloses the following technical effects:

[0020] The technical solution of this utility model adopts 0.15mm stainless steel particle board to replace the traditional 1.2-1.5mm thick flat material, reducing the weight of the heat shield by about 10 times, significantly improving the lightweight level of the car. At the same time, the structural design is optimized, bolts and nuts are eliminated, and robot automatic spot welding technology is adopted to reduce manual operations, shorten working hours by about 50%, reduce production costs, and improve production efficiency and safety. The new thermal insulation material fixing method adopts connecting nails to penetrate and fix, avoiding the problems of easy falling off, burning and odor caused by traditional gluing, and enhancing the stability and durability of the heat shield. Overall, this technical solution effectively improves the thermal insulation performance of the catalyst carrier, meets environmental protection and safety requirements, and optimizes the use of chassis space, providing a more efficient, economical and environmentally friendly solution for automotive catalysts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is an axonometric diagram of a conventional automotive catalyst protection and heat insulation structure;

[0023] Figure 2 This is an axonometric view of a thin-walled thermal insulation structure of an automobile catalyst according to an embodiment of the present utility model;

[0024] Figure 3 This is an axonometric view of the heat shield 1 in the embodiment of the present utility model;

[0025] Figure 4 This is a front view of the heat shield 1 in the embodiment of the present utility model;

[0026] Figure 5 for Figure 4 Cross-sectional view at EE;

[0027] Figure 6 This is an axonometric view of the second heat shield in the embodiment of the present utility model;

[0028] Figure 7 This is a front view of the second heat shield in the embodiment of the present utility model;

[0029] Figure 8 for Figure 7 Cross-sectional view at FF;

[0030] Figure 9 This is a schematic diagram of the fixing method of the heat insulation cover and the heat insulation cotton in the embodiment of the present utility model;

[0031] Figure 10 This is a partial cross-sectional view of the heat insulation cover and the heat insulation cotton fixed by connecting nails in an embodiment of the present invention.

[0032] In the figure: 1. Heat insulation cover 1; 2. Heat insulation cover 2; 3. Flanged welding position; 301. Welding area 1; 302. Welding area 2; 303. Welding area 3; 04. Welding area 4; 305. Welding area 5; 306. Welding area 6; 307. Welding area 7; 308. Welding area 8; 4. Insulation cotton fixing point; 5. Insulation cotton; 6. Connecting nails. DETAILED DESCRIPTION

[0033] 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 are within the scope of protection of the present invention.

[0034] like Figure 1 As shown, the external thermal insulation protection structure of the automotive catalytic converter in the prior art includes two upper and lower protective covers. The material thickness of each protective cover is more than 1.2 mm and is formed by stamping thick plates. Since the product uses a lot of materials and is heavy, it is not conducive to lightweighting the entire vehicle. After the upper and lower protective covers are buckled together, they are assembled and fastened with bolts and nuts on the main body mounting bracket through the built-in mounting holes. The operation intensity is high, the time is long, and it is easy to cause missing installation. The tightening force is insufficient, and there is a risk of abnormal noise and falling off of the product, which affects driving safety. In addition, due to its large weight, the product body needs to be welded with a corresponding mounting bracket to cooperate with the heat insulation cover for fixed installation, which increases the number of parts and welding and increases the cost. At the same time, the heat insulation cotton 5 material used in the existing stamped heat insulation cover needs to be bonded with glue, which will cause safety hazards such as easy falling off, easy burning and odor. Therefore, the existing thin-walled thermal insulation structure of automotive catalytic converters cannot fully meet the increasingly stringent environmental protection standards and lightweight requirements, and needs to be improved through technological innovation.

[0035] To this end, the present invention aims to solve these problems by optimizing materials, structures, processing technology and operating methods to achieve a lighter, more efficient and safer product.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] Reference Figures 2 to 10As shown, the embodiment of the present invention provides a thin-walled thermal insulation structure for an automobile catalyst, comprising a thermal insulation cover and thermal insulation cotton 5 located on the inner wall of the thermal insulation cover, wherein the thermal insulation cover is divided into two pieces, comprising a thermal insulation cover 1 and a thermal insulation cover 2, wherein the thermal insulation cover 1 and the thermal insulation cover 2 are both made of 0.15mm stainless steel particle board, and are integrated into a stamping and forming process by a punching and stretching shaping process. The stainless steel particle board is significantly thinner than the product material of the prior art, so it is thinner, lighter, and easier to form. The thermal insulation cover 1 and the thermal insulation cover 2 no longer use the bolt connection of the prior art, but instead set multiple flange welding positions 3 at the edge of the joint position of the two thermal insulation covers, and complete the connection of the thermal insulation cover 1 and the thermal insulation cover 2 by automatic welding reinforcement with a robot. Compared with the bolt connection, it can avoid the risk of missing installation, insufficient bolt torque, and falling off, greatly improving the efficiency of product processing. The heat insulation cotton 5 is fixed to the inner side of the heat insulation cover by connecting nails 6. The fixing method is simple and efficient. Compared with the bonding method of the prior art, it eliminates the risks of flammability, easy falling off and odor caused by the product adhesive.

[0038] In a specific embodiment, Figures 3 to 8 As shown, the heat shield 1 and the heat shield 2 are designed according to the product model of the catalyst, and their shapes have multiple forms. The embodiment of the utility model is described by taking one of the products as an example. Figure 4 and Figure 7 As shown, multiple horizontal welding areas extend outward from the edges of the heat shield 1 and the heat shield 2, for example, including welding area 1 301, welding area 2 302, welding area 303, welding area 4 04, welding area 5 305, welding area 6 306, welding area 7 307, and welding area 8 308, which are sequentially arranged around the edge of the heat shield 1, and welding area 1 301, welding area 2 302, welding area 303, welding area 4 04, welding area 5 305, welding area 6 306, welding area 7 307, and welding area 8 308, which are correspondingly arranged on the edge of the heat shield 2.

[0039] It should be understood that each welding area on the heat shield 1 and each welding area on the heat shield 2 correspond to each other one by one to form surface contact, which facilitates welding.

[0040] It should also be understood that the number of welding areas on the two heat shields is set according to their shapes and sizes, but it should be ensured that at least one welding area for welding connection is provided in each of the front, back, left, and right directions of the heat shields.

[0041] In some optional embodiments, the length of the welding area is generally 25.5 mm to 40 mm, and the width of the welding area is 10 mm to 12 mm.

[0042] In some optional embodiments, both the heat shield 1 and the heat shield 2 2 are provided with a product identification area for marking product information. For example, the product name, manufacturer name or code, manufacturer trademark, component model, component number and other information can be marked in the product identification area by laser engraving.

[0043] In some optional embodiments, the product identification area and the surrounding panel surface are punched into a concave shape, the shape is a rectangular area, and the concave height is ≤5mm.

[0044] In some optional embodiments, the material of the heat shield 1 and the heat shield 2 is SUS304, whose chemical composition and mechanical properties meet the relevant requirements of cold-rolled stainless steel plates and strips for automobiles.

[0045] In a specific embodiment, Figure 9 and Figure 10 As shown, both the heat insulation cover 1 and the heat insulation cover 2 2 are provided with a number of heat insulation cotton fixing points 4 for driving connecting nails 6. The heat insulation cotton fixing points 4 are in a stamped concave shape, and the connecting nails 6 are driven into the interior of the heat insulation cover to be fixedly connected to the heat insulation cotton 5.

[0046] In some optional embodiments, the connecting nails 6 are shaped like an outward ellipse and penetrate the heat insulation cover and then extend into the heat insulation cotton 5 to fix it.

[0047] In some optional embodiments, the thermal insulation cotton 5 may also be adhered to the inner surface of the thermal insulation cover using a high temperature resistant adhesive.

[0048] In some optional embodiments, the thermal insulation cotton 5 can also be pre-pasted on the inner surface of the thermal insulation cover by an internal high-temperature adhesive, and then reinforced and fixed using connecting nails 6.

[0049] In some optional embodiments, the thermal insulation cotton 5 is not allowed to exceed the boundary of the thermal insulation cover. Optionally, it is 50 mm away from the boundary. The thermal insulation cotton 5 is firmly fixed to avoid falling off and deformation during transportation.

[0050] In some optional embodiments, the thermal insulation cotton 5 is made of high-silica glass fiber or aluminum silicate, and the long-term high-temperature resistance of the material is not less than 850°C.

[0051] In some optional embodiments, the thickness of the thermal insulation cotton 5 material is 8 mm and the volume density is 130 kg / m 3 .

[0052] Compared with the prior art, the embodiments of the present invention at least disclose the following beneficial effects:

[0053] 1. By replacing the heat shield material with 0.15mm particle board, the weight is reduced by about 10 times, achieving product lightweighting.

[0054] 2. It eliminates the need for bolt and nut assembly and body welding mounting brackets, reducing the number of parts and lowering labor and processing costs.

[0055] 3. Realize robot-automated production, reduce the risk of incorrect or missing installation and product falling off, and improve vehicle safety and production efficiency.

[0056] 4. Improve the way of fixing the thermal insulation material, changing from the original adhesive bonding to 6 penetrating nails to eliminate the risks of flammability, falling off and odor caused by the product adhesive.

[0057] 5. The original bolt and nut fixation is changed to projection welding, which has high strength, small space occupation, easy operation and higher stability and durability.

[0058] 6. It meets the requirements of the catalyst device for external packaging protection and insulation, and improves the stability and durability of the product.

[0059] 7. The manual pneumatic wrench assembly was changed to automatic welding reinforcement by a robot workstation, which shortened the product working hours by about 50%.

[0060] 8. The parts realize the compact assembly of the vehicle chassis space and the convenience of replacing accessories.

[0061] 9. It meets the national environmental protection requirements for stricter vehicle pollutant emission standards and reduces the pollution of automobile exhaust to the environment.

[0062] Anything not described in detail in the present invention is a conventional technical means well known to those skilled in the art.

[0063] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0064] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A thin-walled thermal insulation structure for an automobile catalyst, characterized in that: include: A heat shield (1), wherein the heat shield (1) is formed by stamping a 0.15 mm stainless steel particle board, and the edge of the heat shield (1) extends outward with a flange, and a plurality of welding areas are provided on the flange; Heat shield 2 (2); the heat shield 2 (2) is made of the same material and formed in the same manner as the heat shield 1 (1); the edge of the heat shield 2 (2) extends outward with a flange, and a plurality of welding areas corresponding to the welding areas on the heat shield 1 (1) are provided on the flange; the heat shield 2 (2) is welded to the heat shield 1 (1); Thermal insulation cotton (5), the thermal insulation cotton (5) is fixed to the inner surface of the thermal insulation cover 1 (1) and the thermal insulation cover 2 (2) by connecting nails (6) and / or high temperature resistant adhesive.

2. The automotive catalyst thin-wall insulation structure according to claim 1, characterized in that: At least one welding area is provided on each direction of the heat shield 1 (1) and the heat shield 2 (2).

3. The automotive catalyst thin-wall insulation structure according to claim 2, characterized in that: Eight welding areas are provided on the edges of the heat shield 1 (1) and the heat shield 2 (2).

4. The automotive catalyst thin-wall insulation structure according to any one of claims 1 to 3, characterized in that: The welding area is 25.5 mm to 40 mm long and 10 mm to 12 mm wide.

5. The automotive catalyst thin-wall insulation structure according to claim 1, characterized in that: The heat insulation cover 1 (1) and the heat insulation cover 2 (2) are both provided with a plurality of heat insulation cotton fixing points (4) for driving connecting nails (6), and the heat insulation cotton fixing points (4) are in a stamped concave shape.

6. The automotive catalyst thin-wall insulation structure according to claim 5, characterized in that: The connecting nail (6) is shaped like an outward ellipse and penetrates the first heat insulation cover (1) or the second heat insulation cover (2) and then extends into the heat insulation cotton (5) to form a fixed shape.

7. The automotive catalyst thin-wall insulation structure according to claim 6, characterized in that: The heat insulation cotton (5) is 50 mm away from the boundary of the heat insulation cover 1 (1) or the heat insulation cover 2 (2).

8. The automotive catalyst thin-wall insulation structure according to claim 6, characterized in that: The heat insulating cotton (5) is made of high-silica glass fiber or aluminum silicate with a thickness of 8 mm.

9. The thin-walled thermal insulation structure of an automobile catalyst according to claim 1, characterized in that: The long-term high temperature resistance of the heat insulating cotton (5) is not less than 850°C.

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