Automobile testing fixture cast aluminum base with T-shaped feet and back-shaped feet

Abstract

The utility model belongs to automobile manufacturing detection equipment technical field especially relates to a car gauge cast aluminium bottom plate with T character foot and back character foot, including bottom plate main part, T character foot and back character foot, T character foot and back character foot distribute in bottom plate main part bottom, bottom plate main part is rectangular plate like structure. This car gauge cast aluminium bottom plate with T character foot and back character foot, integrated mould scheme passes through the structural design of optimization T character foot and back character foot, has reduced unnecessary material use, the hollow structure of back character foot and the reasonable size design of T character foot have reduced the consumption of aluminium alloy material, can dismantle the connection scheme and has reduced the cost in the transportation and maintenance aspect, dismantles the support foot and reduces space occupation and transportation expense when transporting, only needs to replace the damaged part when maintaining, avoided the high cost of the overall replacement bottom plate.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile manufacturing testing equipment, specifically to a cast aluminum base plate for automobile inspection fixtures with T-shaped and U-shaped feet. Background Technology

[0002] With the booming development of the automotive manufacturing industry, the precision requirements for automotive parts are becoming increasingly stringent, highlighting the growing importance of automotive inspection fixtures. Cast aluminum base plates, due to their good mechanical properties, excellent casting processability, and relatively light weight, have become a commonly used material for automotive inspection fixture base plates. However, existing cast aluminum base plates for automotive inspection fixtures face several problems that urgently need to be addressed in practical applications.

[0003] Traditional automotive inspection fixtures with cast aluminum base plates often employ simple column or frame designs for their support structure. This type of structure exhibits poor stability under complex inspection conditions. Taking the inspection of engine blocks at a certain automotive company as an example, the traditional column-type base plate, when bearing the weight of the cylinder block and the pressure of the inspection equipment, suffers from a 0.3-0.5mm deformation in the middle of the base plate due to the large column spacing and single support point. This results in a deviation of ±0.2mm in the inspection data, severely impacting product quality assessment.

[0004] Furthermore, traditional base plates typically use welding or integral casting to fix the support legs to the main body of the base plate. This connection method causes the base plate to occupy a large space during transportation, increasing transportation costs and difficulties. Statistics show that transporting traditional integral base plates, due to their large volume, limits the amount that can be transported at one time, increasing transportation costs by approximately 25%-35% compared to detachable base plates. Additionally, if the support legs are damaged, the entire base plate often needs to be replaced, resulting in high repair costs and severely impacting the company's production efficiency and economic benefits.

[0005] Furthermore, with the automotive manufacturing industry placing increasing emphasis on cost control and green manufacturing, traditional cast aluminum floor plates suffer from low material utilization and high casting costs due to unreasonable structural design, which is inconsistent with industry development trends. Traditional floor plates excessively increase material thickness to ensure strength, resulting in material waste and a material utilization rate generally below 65%. New lightweight designs aim to increase material utilization to over 80%, making the development of new floor plates an urgent necessity. Utility Model Content

[0006] The purpose of this utility model is to provide a cast aluminum base plate for automotive inspection fixtures with T-shaped feet and U-shaped feet, so as to solve the problems mentioned in the background art.

[0007] To achieve the above object, the present utility model provides the following technical solutions: An automotive inspection fixture cast aluminum bottom plate with a T-shaped foot and a square frame foot, including a bottom plate main body, a T-shaped foot, and a square frame foot. The T-shaped foot and the square frame foot are distributed at the bottom of the bottom plate main body. The bottom plate main body is in a rectangular plate structure, with the minimum thickness of its plate surface being 15 cm, the minimum width being 40 cm, the minimum length being 60 cm, the maximum length being 390 cm, the maximum width being 270 cm, and the maximum thickness being 38 cm.

[0008] Preferably, the height range of the T-shaped foot and the square frame foot is 80 cm - 100 cm. There are seven square frame feet and two T-shaped feet at the bottom of the bottom plate main body. The seven square frame feet are respectively located on the left and right sides of the bottom plate main body, three on each side, symmetrically distributed, and one is arranged in the middle of the bottom plate main body; the two T-shaped feet are arranged at the middle position in the length direction of the bottom plate main body, one on the top and one on the bottom, symmetrically distributed.

[0009] Preferably, the T-shaped foot is in a "T" shape, and the width of its horizontal part is 1 / 5 - 1 / 4 of the width of the bottom plate main body, and the vertical part extends vertically downward.

[0010] Preferably, the square frame foot is in a "square frame" shape, with an outer frame size of 15 cm × 15 cm, an inner frame size of 10 cm × 10 cm, a wall thickness of 2.5 cm, and a hollow structure inside.

[0011] Preferably, the T-shaped foot and the square frame foot are manufactured with the bottom plate main body by an integral forming process. Using a low-pressure casting process, aluminum alloy liquid is injected into the mold cavity at a speed of 5 - 10 L / min under a low-pressure environment of 0.02 - 0.05 MPa, and an exhaust groove with a width of 0.3 - 0.5 mm is opened on the mold parting surface.

[0012] Preferably, the aluminum alloy liquid is A356 aluminum alloy, the pouring temperature is 700 - 720 °C, the holding pressure is 0.05 - 0.06 MPa, and the holding time is 3 - 5 minutes.

[0013] Preferably, the T-shaped foot and the square frame foot are detachably connected to the bottom plate main body through a spiral structure. Installation holes are provided at the bottom of the bottom plate main body corresponding to the installation positions of the T-shaped foot and the square frame foot. Threaded holes matching the installation holes are provided at the tops of the T-shaped foot and the square frame foot, and they are connected by high-strength bolts. The diameter of the installation hole is 0.5 - 1 mm larger than the diameter of the bolt, and the precision grade of the threaded hole is 6H.

[0014] Preferably, the high-strength bolt is of grade 8.8, and the connection part adopts double anti-loosening measures of a spring washer and a thread locking agent.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. This automotive fixture cast aluminum base plate with T-shaped and U-shaped feet is a one-piece molding solution. By optimizing the structural design of the T-shaped and U-shaped feet, unnecessary material usage is reduced. The hollow structure of the U-shaped feet and the reasonable size design of the T-shaped feet reduce the consumption of aluminum alloy materials while ensuring structural strength. Compared with traditional base plate materials, the cost is reduced by about 18%-22%.

[0017] 2. This cast aluminum base plate for automotive inspection fixtures, featuring T-shaped and U-shaped feet, offers a detachable connection solution that reduces costs in transportation and maintenance. Removing the support feet during transport minimizes space occupation and transportation costs. During maintenance, only damaged parts need to be replaced, avoiding the high cost of replacing the entire base plate. Overall, this reduces costs by approximately 25%-30%. The combination of these two solutions effectively lowers the production cost of the cast aluminum base plate for automotive inspection fixtures, improving the company's economic efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the cast aluminum base plate of this utility model;

[0019] Figure 2 This is a top view schematic diagram of the overall structure of the cast aluminum base plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall front structure of the cast aluminum base plate of this utility model.

[0021] In the diagram: 1. Base plate; 2. T-shaped foot; 3. U-shaped foot; 4. Mounting hole; 5. High-strength bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figure 1-3 This utility model provides a technical solution: a cast aluminum base plate for an automotive inspection tool with T-shaped feet and U-shaped feet, including a base plate body 1, T-shaped feet 2 and U-shaped feet 3, wherein the T-shaped feet 2 and U-shaped feet 3 are distributed at the bottom of the base plate body 1, and the base plate body 1 has a rectangular plate structure.

[0024] Option 1: T-shaped and U-shaped feet are molded as one piece.

[0025] The cast aluminum bottom plate of this automotive inspection fixture is mainly composed of a bottom plate main body 1, T-shaped feet 2, and square feet 3. The T-shaped feet 2 and square feet 3 are manufactured integrally with the bottom plate main body. The bottom plate main body 1 is in the shape of a rectangular plate, and its dimensional specifications have a certain range of variation. The minimum thickness of the plate surface is 15 cm, the minimum width is 40 cm, and the minimum length is 60 cm; the maximum length can reach 390 cm, the maximum width is 270 cm, and the maximum thickness is 38 cm.

[0026] The T-shaped feet 2 and square feet 3 are distributed in a specific layout at the bottom of the bottom plate main body 1. There are a total of 7 square feet 3 and 2 T-shaped feet 2. The 7 square feet 3 are located on the left and right sides of the bottom plate main body 1 and in the middle part of the bottom plate main body 1, with 3 on each side and 1 in the middle of the bottom plate, symmetrically distributed; the 2 T-shaped feet 2 are set at the middle position in the length direction of the bottom plate main body 1, 1 at the top and 1 at the bottom, also symmetrically distributed. The height range of the T-shaped feet 2 and square feet 3 is between 80 cm and 100 cm.

[0027] From the perspective of mechanical structure design, the shape of the T-shaped feet 2 is a typical "T" shape. Its horizontal part is closely connected to the bottom of the bottom plate main body 1, and the vertical part extends vertically downward. The width of the horizontal part of the T-shaped feet 2 is designed to be 1 / 5 - 1 / 4 of the width of the bottom plate 1. Such a ratio can maximize the support area in the horizontal direction while ensuring the connection strength. Through mechanical simulation analysis, when承受1000N・m of torque load, the structure of the T-shaped feet 2 can reduce the local stress of the bottom plate by 30% - 40%, effectively dispersing the pressure from automotive parts, reducing the excessive local stress on the bottom plate main body, and improving the overall stability of the bottom plate. The shape of the square feet 3 is a "square" shape, with a hollow structure inside. The outer frame size is 15 cm × 15 cm, the inner frame size is 10 cm × 10 cm, and the wall thickness is 2.5 cm. This unique design greatly reduces its own weight while ensuring sufficient strength, with a weight reduction of about 40% - 50% compared to a solid structure. At the same time, the special shape of the square feet 3 enables it to provide stable support forces in the X, Y, and Z directions. Through finite element analysis, it shows that under multi-directional loading conditions, the square feet 3 can reduce the deformation of the bottom plate by 25% - 35%, further enhancing the stability of the bottom plate main body 1 under complex working conditions, effectively avoiding the deformation of the bottom plate caused by uneven stress, and thus ensuring the high precision of automotive part inspection.

[0028] Advanced low-pressure casting technology is employed during the one-piece molding process. This process involves slowly injecting molten aluminum alloy into the mold cavity at a rate of 5-10 L / min under a low pressure environment of 0.02-0.05 MPa. During the mold design phase, Moldflow software is used for filling simulation to optimize the gate position and number, ensuring that the molten aluminum alloy can fully fill all corners of the mold and avoid defects such as incomplete filling and cold shuts. Simultaneously, a reasonable venting system is implemented, with 0.3-0.5 mm venting grooves on the mold parting surface to ensure smooth gas discharge from the cavity. This guarantees a tight connection between the T-shaped feet 2 and the U-shaped feet 3 and the base plate body 1, free from casting defects such as porosity and shrinkage, forming a robust integral structure. Through precise mold design and strict control of casting process parameters, the internal microstructure of the base plate is effectively optimized, refining the grains and improving its mechanical properties. Testing shows that the tensile strength of the base plate manufactured using this process can reach 250-280 MPa, and the yield strength reaches 180-200 MPa, significantly extending the service life of the base plate.

[0029] Example 2: The T-shaped foot 2 and the U-shaped foot 3 are detachably connected to the base plate body 1 through a spiral structure;

[0030] This design also includes a base plate body 1, T-shaped feet 2, and rectangular feet 3. The dimensions of the base plate body 1 are the same as the one-piece molding design, with a minimum thickness of 15cm, a width of 40cm, and a length of 60cm; and a maximum length of 390cm, a width of 270cm, and a thickness of 38cm. The height range of the T-shaped feet 2 and rectangular feet 3 is also 80cm-100cm, and the distribution of the 7 rectangular feet and 2 T-shaped feet at the bottom of the base plate body 1 is the same as the one-piece molding design, with the 7 rectangular feet 3 distributed on the left and right sides and the middle of the base plate, and the 2 T-shaped feet 2 located at the top and bottom of the middle of the base plate.

[0031] At the bottom of the base plate 1, corresponding to the mounting positions of the T-shaped feet 2 and the U-shaped feet 3, multiple precise mounting holes 4 are machined using a CNC machining center. The diameter of the mounting holes 4 is 0.5-1mm larger than the bolt diameter, ensuring that the bolts can pass through smoothly and with a certain degree of fit accuracy. Simultaneously, the tops of the T-shaped feet 2 and U-shaped feet 3 are provided with threaded holes that match the mounting holes 4, with a thread accuracy grade of 6H, ensuring the reliability of the threaded connection. Using 8.8 grade high-strength bolts 5 and other spiral connectors, the T-shaped feet 2 and U-shaped feet 3 are securely installed onto the base plate 1, achieving a detachable connection between the two. At the bolt connection points, a double anti-loosening measure of spring washers and thread-locking agents is adopted. Vibration testing showed no loosening at the connection points under vibration conditions of 50-200Hz frequency and 2g acceleration, ensuring the stability of the connection.

[0032] This detachable connection method offers significant advantages. During the transportation of automotive inspection fixtures, the T-shaped and U-shaped feet can be disassembled, drastically reducing the overall volume and weight of the base plate, thus lowering transportation difficulty and costs. Actual calculations show that disassembly reduces transportation volume by approximately 40%-50% and transportation costs by 30%-40%. During installation and use, the installation position and number of T-shaped and U-shaped feet can be flexibly adjusted according to the inspection requirements of different automotive parts. For example, when inspecting small automotive parts, the number of U-shaped feet can be reduced from one on each side, improving inspection efficiency; when inspecting large or heavy automotive parts, auxiliary support feet can be added to enhance the load-bearing capacity and stability of the base plate. Furthermore, when a T-shaped or U-shaped foot is damaged, it is not necessary to replace the entire base plate; only the damaged part needs to be replaced. This reduces repair time by 70%-80% and repair costs by 60%-70%, greatly improving the economic efficiency and ease of maintenance of automotive inspection fixtures.

[0033] The hollow structure of the U-shaped foot 2 and the optimized design of the T-shaped foot 3 significantly reduce the overall weight of the base plate 1. Compared to traditional base plates, the base plate of this invention can reduce weight by 20-50% while maintaining the same strength and stability. Taking the largest size base plate as an example, the traditional base plate weighs approximately 1200 kg, while the base plate of this invention can be reduced to 900-1020 kg. The lighter weight not only reduces transportation costs but also reduces the lifting difficulty and equipment load during the installation and use of automotive inspection tools, improving the safety and reliability of equipment operation.

[0034] The detachable connection design allows the T-shaped feet 2 and the U-shaped feet 3 to be disassembled, breaking down the base plate into multiple smaller components for easier transportation and handling. Even the one-piece molded base plate 1 is lighter and easier to transport due to its optimized structural design. This effectively improves logistics efficiency, shortens transportation time, reduces transportation costs, and enhances the competitive advantage of automotive tool manufacturers and users in the market.

[0035] The rational layout and unique structural design of the T-shaped feet 2 and the U-shaped feet 3 provide multi-directional and stable support for the base plate 1. The distribution of four U-shaped feet 2 and two T-shaped feet 3 can evenly disperse the pressure and impact generated during the inspection process, reducing the deformation of the base plate. Experimental data shows that, under the same inspection conditions, the deformation of the base plate 1 using this invention is reduced by 30%-40% compared to traditional base plates, thereby effectively improving the stability and inspection accuracy of automotive inspection tools, ensuring the accuracy and reliability of automotive parts inspection results, and providing strong support for the quality control of automotive products.

[0036] The detachable connection design allows automotive inspection fixtures to be flexibly adjusted to meet the inspection needs of different automotive parts, enhancing their versatility and applicability. Enterprises no longer need to equip themselves with multiple dedicated fixtures for different inspection tasks, reducing equipment procurement costs and improving equipment utilization. Simultaneously, the integrated molding base plate can be optimized to meet the needs of various inspection scenarios, further expanding the application scope of this product and adapting to the diverse production needs of the automotive manufacturing industry.

[0037] It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Note the accuracy of the description throughout.

Claims

1. A cast aluminum base plate for automotive inspection fixtures with T-shaped and U-shaped feet, characterized in that, It includes a bottom plate main body (1), a T-shaped foot (2) and a square frame foot (3). The T-shaped foot (2) and the square frame foot (3) are distributed at the bottom of the bottom plate main body (1). The bottom plate main body (1) is in the shape of a rectangular plate structure, with the minimum thickness of its plate surface being 15 cm, the minimum width being 40 cm, the minimum length being 60 cm, the maximum length being 390 cm, the maximum width being 270 cm, and the maximum thickness being 38 cm.

2. The cast aluminum base plate of an automotive inspection fixture with T-shaped and U-shaped feet according to claim 1, characterized in that: The height range of the T-shaped foot (2) and the square frame foot (3) is 80 cm - 100 cm. There are seven square frame feet (3) and two T-shaped feet (2) provided at the bottom of the bottom plate main body (1). The seven square frame feet (3) are respectively located on the left and right sides of the bottom plate main body (1) and in the middle of the bottom plate main body (1), three on each side and one in the middle of the bottom plate main body (1), symmetrically distributed; the two T-shaped feet (2) are arranged at the middle positions in the length direction of the bottom plate main body (1), one on the top and one on the bottom, symmetrically distributed.

3. The cast aluminum base plate of an automotive inspection fixture with T-shaped and U-shaped feet according to claim 1, characterized in that: The T-shaped foot (2) is in the shape of a "T", and the width of its horizontal part is 1 / 5 - 1 / 4 of the width of the bottom plate main body (1), and its vertical part extends vertically downward.

4. The cast aluminum base plate of an automotive inspection fixture with T-shaped and U-shaped feet according to claim 1, characterized in that: The square frame foot (3) is in the shape of a "square frame", with the outer frame size being 15 cm × 15 cm, the inner frame size being 10 cm × 10 cm, the wall thickness being 2.5 cm, and the interior being a hollow structure.

5. The cast aluminum base plate of an automotive inspection fixture with T-shaped and U-shaped feet according to claim 1, characterized in that: The T-shaped foot (2) and the square frame foot (3) and the bottom plate main body (1) are manufactured by an integral molding process, and an exhaust groove with a width of 0.3 - 0.5 mm is opened at the mold parting surface.

6. The cast aluminum base plate of an automotive inspection fixture with T-shaped and U-shaped feet according to claim 1, characterized in that: The T-shaped foot (2) and the square frame foot (3) are detachably connected to the bottom plate main body (1) through a spiral structure. Installation holes (4) are provided at the bottom of the bottom plate main body (1) corresponding to the installation positions of the T-shaped foot (2) and the square frame foot (3). Threaded holes matching the installation holes are provided at the tops of the T-shaped foot (2) and the square frame foot (3), and they are connected by high-strength bolts (5). The diameter of the installation hole is 0.5 - 1 mm larger than the diameter of the bolt, and the precision grade of the threaded hole is 6H.

7. The cast aluminum base plate of an automotive inspection fixture with T-shaped and U-shaped feet according to claim 6, characterized in that: The high-strength bolt (5) is of grade 8.8, and double anti-loosening measures of a spring washer and a thread locking agent are adopted at the connection part.

Images