Subframe, terminal and machining process of subframe

Abstract

The application relates to the technical field of terminals, in particular to a sub-frame, a terminal and a processing technology of the sub-frame. The sub-frame comprises a beam body, a partition piece and a connecting piece. The beam body is provided with a cavity, the partition piece is arranged in the cavity, the partition piece divides the cavity into at least two accommodating cavities, and at least one of the accommodating cavities is used for accommodating gas. The connecting piece is connected to the outer surface of the beam body, and is used for connecting a functional component. The position of the at least one connecting piece and the position of the partition piece correspond to each other along the length direction of the beam body. In the application, the partition piece can divide the cavity into multiple accommodating cavities, so that the sub-frame can store gas. In addition, the position of the connecting piece and the position of the partition piece correspond to each other, so that the partition piece can strengthen the structural strength of the position where the beam body and the connecting piece are connected, prevent the position where the beam body and the connecting piece are connected from being deformed or even cracked, and prolong the service life of the beam body.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a subframe, a terminal, and a processing technology for the subframe. Background Technology

[0002] Vehicles and other terminals include a wide variety of gas-using devices, such as air springs, massage seats, or tires. These terminals are typically equipped with a central gas supply tank to provide gas to these devices.

[0003] However, with the increase in the number of gas-consuming devices and the improvement in their performance, the demand for gas from these devices is growing. To meet this demand, the volume of gas storage tanks must be increased, leading to a larger tank size. Larger tanks encroach on the passenger and / or cargo space of the terminal, reducing its overall volume. Furthermore, larger tanks are heavier, increasing the weight of the terminal and raising its manufacturing costs. Summary of the Invention

[0004] This application provides a subframe, a terminal, and a manufacturing process for the subframe. By utilizing the cavity of the subframe to store gas, the volume requirement of the gas storage tank for the terminal is reduced, or even eliminated altogether. This prevents the gas storage tank from encroaching on passenger and / or cargo space, thereby reducing the weight and manufacturing cost of the terminal. While utilizing the cavity of the subframe to store gas, the dimensions and structural strength of the subframe are also considered.

[0005] The first aspect of this application provides a subframe, including a support beam, the support beam comprising a beam body, a partition, and a connector. The beam body has a cavity, and the partition is disposed within the cavity, dividing the cavity into at least two receiving chambers, at least one of which is used to contain gas.

[0006] The connectors are attached to the outer surface of the beam and are used to connect functional components. Along the length of the beam, at least one connector corresponds to the position of a separator.

[0007] In this application, firstly, the partition divides the cavity into multiple receiving chambers to facilitate gas storage in the subframe. Secondly, the positions of the connecting members and the partitions correspond so that the partitions strengthen the structural strength at the connection between the beam and the connecting members, preventing deformation or even cracking at the connection point and extending the lifespan of the beam. Thirdly, after the partitions reinforce the beam, it is not necessary to increase the outer diameter of the beam to ensure structural strength; the outer diameter of the beam can be reduced to save space.

[0008] In some possible implementations, the partition and the connector are positioned opposite each other along a first direction, which is perpendicular to the length of the beam. The partition is positioned at the connection point between the beam and the connector to precisely increase the structural strength at that connection point.

[0009] In some possible implementations, the distance between the centerline of the projection area of ​​the partition member on the beam and the centerline of the projection area of ​​the connector on the beam, along the length direction of the beam, is a first distance, which is less than or equal to a first threshold. This is to make the positions of the partition member and the connector closer together, or to make the partition member and the connector directly opposite each other, ensuring that the partition member can strengthen the structural strength at the connection point between the beam and the connector.

[0010] In some possible implementations, the size of the partition is greater than or equal to the size of the connector along the length of the beam. When the partition and connector are opposite each other, the structural strength is enhanced at all points where the beam and connector are connected.

[0011] In some possible implementations, the beam includes longitudinal beams with cavities. Connectors are attached to the outer surface of the longitudinal beams, and spacers are disposed within the cavities. Along the length of the longitudinal beam, the connectors and spacers are both located at the middle of the beam.

[0012] During vehicle operation, the connecting member in the middle of the longitudinal beam experiences the greatest lateral force, making the middle of the longitudinal beam the weakest point of the entire subframe. Installing a separator in the middle of the longitudinal beam strengthens the structural integrity of this weakest point, extends the subframe's lifespan, and improves the vehicle's safety.

[0013] In some possible implementations, the partition is provided with a connecting hole that connects two adjacent receiving cavities. After the two receiving cavities are connected, they can share the air inlet and outlet, reducing the number of air inlets and outlets and mitigating their impact on the structural strength of the beam.

[0014] In some possible implementations, the beam includes a connecting portion that encloses a receiving cavity. A connector is attached to the outer surface of the connecting portion. A partition includes a first side and a second side, which are opposite to each other. The first side is attached to the inner surface of the connecting portion, and the second side is the side of the partition away from the connecting portion. The first side is where the partition and the connecting portion are directly connected, and its width is larger to better increase the structural strength of the connecting portion. The second side is away from the connecting portion, and its width is smaller, which serves to both separate the receiving cavity and supplement the strength of the connecting portion, while also reducing the volume of the partition.

[0015] In some possible implementations, functional components include a suspension system, a connector for linking the suspension links, and a separator extending in the same direction as the links. The direction of the link extension is the direction of the force exerted by the link on the connector, and also the direction of the force exerted by the connector on the beam. The separator extends along the direction of the force, directly bearing the force transmitted from the links, significantly reducing the stress on the beam and minimizing the risk of beam deformation or cracking.

[0016] Among some possible implementations, the linkage includes at least one of the following: rear trailing arm, camber arm, toe arm, front trailing arm, and load arm.

[0017] The connecting components include at least one of the following: a rear trailing arm connecting component, a camber arm connecting component, a toe arm connecting component, a front trailing arm connecting component, and a load-bearing arm connecting component. The separators include at least one of the following: a first separator, a second separator, a third separator, a fourth separator, and a fifth separator. Along the length of the beam, the distance between the rear trailing arm connecting component and the first separator is less than or equal to a first threshold value; the distance between the camber arm connecting component and the second separator is less than or equal to a first threshold value; the distance between the front toe arm connecting component and the third separator is less than or equal to a first threshold value; the distance between the front trailing arm connecting component and the fourth separator is less than or equal to a first threshold value; and the distance between the load-bearing arm connecting component and the fifth separator is less than or equal to a first threshold value.

[0018] In the above implementation, the five connecting parts of the longitudinal beam are all located at the weak points of the beam. Setting the separators at the weak points of the beam can not only divide the cavity of the beam into multiple cavities, but also increase the structural strength of the weak points of the beam, extend the service life of the subframe, and increase the vehicle safety factor.

[0019] In some possible implementations, the beam includes a longitudinal beam. The longitudinal beam comprises a first part and a second part, arranged along the height direction of the beam and fixedly connected. Both the first and second parts have cavities. Along the length direction of the beam, the rear trailing arm connector, camber arm connector, toe arm connector, and front trailing arm connector are sequentially connected to the outer surface of the first part, and the load-bearing arm connector is connected to the outer surface of the second part. A first partition, a second partition, a third partition, and a fourth partition are sequentially disposed within the cavity of the first part, and a fifth partition is disposed within the cavity of the second part.

[0020] In the above implementation, the load-bearing arm connector is connected to the second part, facilitating the load-bearing arm to bear the load of the wheel. The camber arm connector is connected to the first part, facilitating the camber arm to precisely control the camber angle of the wheel. The front trailing arm connector and the rear trailing arm connector are connected to the first part, enabling the front and rear trailing arms to better constrain the longitudinal forces during vehicle acceleration or braking. The toe-in connector is connected to the first part, making the wheel toe-in change smoother.

[0021] The first to fourth partitions divide the cavity of the first part into multiple receiving cavities, which facilitates gas storage and increases the structural strength of the first part. The fifth partition divides the cavity of the second part into multiple receiving cavities, which facilitates gas storage and increases the structural strength of the second part.

[0022] In some possible implementations, the beam also has process holes that communicate with the receiving cavity. Along the length of the beam, the distance between the process holes and the connectors is greater than or equal to a second threshold. The process holes facilitate the removal of the cores used in the casting of the subframe, and the greater distance between the process holes and the connectors prevents the process holes from affecting the structural strength of the connection between the beam and the connectors.

[0023] In some possible implementations, the subframe also includes seals fixed to the beam to seal the process holes. This ensures the airtightness of the containment cavity, facilitating gas storage within it.

[0024] A second aspect of this application provides a terminal including a subframe and a gas-using device as described in any of the first aspects of this application, wherein the receiving cavity and the gas-using device are connected by a pipe.

[0025] A third aspect of this application provides a manufacturing process for a subframe. The manufacturing process is used to manufacture the subframe, which includes a support beam comprising a beam body and a partition. The beam body has a cavity, and the partition is disposed within the cavity, dividing the cavity into at least two receiving chambers, at least one of which is used to contain gas.

[0026] The processing technology includes: Provide at least two cores.

[0027] At least two cores are placed inside the mold cavity. There is a first gap between the at least two cores and the inner wall of the mold cavity, and a second gap between two adjacent cores.

[0028] Molten liquid is injected into the mold cavity, allowing it to flow into the first and second gaps.

[0029] The molten metal is cooled so that the molten metal in the first compartment forms a beam, and the molten metal in the second compartment forms a separator.

[0030] Remove at least two cores to form at least two receiving cavities in the beam.

[0031] The processing technology provided in this application uses a segmented core machining method to form the subframe, integrally casting the partition and the beam. This results in high reliability of the connection between the partition and the beam, increases the isolation between adjacent cavities, and enhances the sealing performance of the cavities. In the subframe processed by this technology, the partition not only divides the beam's cavity into multiple cavities to facilitate gas storage but also increases the structural strength of weak points in the beam.

[0032] In some possible implementations, the outer surface of the core is coated. First, the coating improves the surface smoothness of the inner wall of the cavity. Second, the coating also serves to isolate the molten metal and the core, preventing direct contact and thus preventing sintering of the core surface. Third, the coating provides both moisture protection and prevents the core and molten metal from reacting.

[0033] Some possible implementations involve removing at least two cores, including: immersing the subframe in a cleaning solution to dissolve the cores; and / or removing at least two cores by vibration. The cores may be sand cores or salt cores. Different removal methods can be selected for different cores to ensure effective removal of various types of cores, improving the flexibility of core selection. For example, when the core is a salt core, water can be used to quickly clean it, improving the cleanliness of the inner wall of the receiving cavity. As another example, when the core is a sand core, vibration can be used to quickly remove it.

[0034] In some possible implementations, after removing at least two cores, the process further includes rinsing the receiving cavity to remove residual particles formed from core fragmentation. This increases the cleanliness of the inner walls of the receiving cavity.

[0035] In some possible implementations, after removing at least two cores, the processing also includes cleaning the receiving cavity to remove residual particles formed from core fragments. This increases the cleanliness of the inner wall surface of the receiving cavity.

[0036] In some possible implementations, after removing at least two cores, the processing also includes immersing the subframe in a cleaning solution to remove residual particulate matter in the receiving cavity, which is formed from core fragmentation. This increases the cleanliness of the inner walls of the receiving cavity.

[0037] In some possible implementations, the core includes a sand core, and the cleaning fluid includes an alkaline solution. When the subframe is made of metals such as aluminum alloy, the alkaline solution can dissolve a layer of metal on the inner surface of the beam. As the metal on the inner surface of the beam is dissolved, the particles adhering to it will fall off simultaneously.

[0038] In some possible implementations, the core may include a salt core, and the cleaning fluid may include water. Salt cores are easily soluble in water, and when a salt core is used as the core, water can be used to quickly clean away residual particles, improving the cleanliness of the inner wall of the cavity. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application.

[0040] Figure 2 This is a schematic diagram of the subframe and suspension connection provided in an embodiment of this application.

[0041] Figure 3 This is a partial structural diagram of the subframe and suspension connection provided in an embodiment of this application.

[0042] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction.

[0043] Figure 5 This is a schematic diagram showing the positional correspondence between the connectors and separators of the subframe provided in an embodiment of this application.

[0044] Figure 6 This is another partial structural diagram of the subframe and suspension connection provided in an embodiment of this application.

[0045] Figure 7 This is another partial structural diagram of the subframe and suspension connection provided in an embodiment of this application.

[0046] Figure 8 This is a partial structural diagram of the subframe provided in an embodiment of this application.

[0047] Figure 9 This is another partial structural schematic diagram of the subframe provided in an embodiment of this application.

[0048] Figure 10 for Figure 3 Schematic diagram of the cross-sectional structure along the BB direction.

[0049] Figure 11 A process diagram illustrating the manufacturing process of the subframe provided in this application embodiment.

[0050] Figure 12 This is a schematic diagram of the structure of the filling core provided in an embodiment of this application. Detailed Implementation

[0051] The embodiments of this application are described below with reference to the accompanying drawings.

[0052] The use of prefixes such as "first" and "second" in this scheme is solely for distinguishing different descriptive objects and does not limit the position, order, priority, quantity, or content of the described objects. For example, the described object is not limited by the prefix and can be one or more; taking "first device" as an example, "device" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the described object is "device," then "first device" and "second device" can be the same device, the same type of device, or different types of devices. In summary, the use of prefixes to distinguish descriptive objects in this application does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and the use of such prefixes should not constitute unnecessary restrictions.

[0053] This application provides a terminal, which can be a vehicle or other means of transportation. It should be understood that the vehicle here is a vehicle in a broad sense, which can be a means of transportation (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), etc.

[0054] An example using a vehicle as the terminal. (Reference) Figure 1 , Figure 1 The X-axis represents the length of vehicle 1000, the Y-axis represents the width of vehicle 1000, and the Z-axis represents the height of vehicle 1000. The positive X-axis direction is forward, and the negative X-axis direction is backward. The positive Y-axis direction is right, and the negative Y-axis direction is left. The positive Z-axis direction is top and apex, and the negative Z-axis direction is bottom and apex.

[0055] "Front" refers to the direction of travel of vehicle 1000, and "rear" refers to the side opposite to the direction of travel of vehicle 1000. "Top" and "top" refer to the side of vehicle 1000 that is away from the ground, and "bottom" and "bottom" refer to the side of vehicle 1000 that faces the ground. "Left" refers to the side of vehicle 1000 located on the left-hand side of the occupant when facing the direction of travel. "Right" refers to the side of vehicle 1000 located on the right-hand side of the occupant when facing the direction of travel.

[0056] Vehicle 1000 includes, but is not limited to, subframe 100, body 200, wheels 300, functional components 400, and pneumatic equipment 500.

[0057] The subframe 100 is located at the bottom of the body 200 and is fixedly connected to the body 200 to support the body 200. The body 200 is the load-bearing frame of the vehicle, used to mount the chassis, power system, and provide space for passengers and cargo. The wheels 300 are connected to both sides of the bottom of the body 200, and bear the load of the entire vehicle, enabling the vehicle 1000 to travel, brake, and steer.

[0058] Functional components 400 include, but are not limited to, suspension 400a, transmission system, power system, or braking system. Suspension 400a buffers road bumps and vibrations, constrains the path of the wheels 300, and ensures ride comfort and handling stability. The power system includes an electric motor and / or engine, providing power to the vehicle. The transmission system transmits the power output from the power system to the wheels 300, simultaneously enabling gear shifting, torque conversion, or direction reversal to match the power demands of the vehicle 1000 under different driving conditions. The braking system dissipates the kinetic energy of the vehicle 1000 through friction, achieving deceleration or stopping, ensuring the safety of the vehicle 1000 during driving and parking.

[0059] In this embodiment, the functional component 400 is exemplified as a suspension 400a. One side of the suspension 400a is connected to the subframe 100, and the other side of the suspension 400a is connected to the wheel 300.

[0060] Air-operated devices 500 include, but are not limited to, air springs, massage seats, tires, and airflow guides. Air springs are a core component of the suspension 400a. Air springs include single-chamber, double-chamber, or triple-chamber types. The more chambers an air spring has, the better its shock absorption effect. Therefore, many vehicles currently use multi-chamber air springs, such as double-chamber or triple-chamber types. When an air spring is inflated or deflated, the internal air pressure changes to cushion road bumps and vibrations. Massage seats include massage airbags. These airbags repeatedly inflate and deflate, expanding and contracting to provide a massage effect. The air in the tires ensures the tire pressure remains within the standard range, preventing over- or under-inflation, extending tire life, and ensuring vehicle safety. Airflow guides inflate to form a wind-resistance surface, reducing wind resistance during vehicle operation. When deflated, airflow guides contract to prevent impact with the ground.

[0061] To supply gas to the gas-using devices 500, the vehicle 1000 also includes a gas tank (not shown), which can be installed under the trunk or chassis. As the number of gas-using devices 500 increases and their performance requirements improve, the vehicle 1000's gas demand increases, leading to an increase in the size of the gas tank. A large gas tank installed under the trunk encroaches on trunk storage space. A large gas tank installed under the chassis encroaches on passenger space. Furthermore, the larger gas tank is heavier, increasing the terminal's weight and manufacturing cost.

[0062] In some possible embodiments, to address the aforementioned problems, a partition is provided within the cavity of the subframe 100 to divide the cavity into receiving cavities. These cavities can be used to store gas, and the stored gas is used by the gas-using equipment 500. Additionally, the partition also enhances the structural strength of the subframe 100 and reduces its volume. This is described in detail below.

[0063] In some possible embodiments, reference is made to Figure 2 The subframe 100 includes a beam 10, a partition 20, and a connector 30. The subframe 100 is manufactured using 3D printing, sheet metal stamping and welding, or casting. For example, the subframe 100 can be a cast aluminum subframe.

[0064] The beam body 10 is provided with a cavity 10a. Exemplarily, the beam body 10 includes two crossbeams 10b and two longitudinal beams 10c. The two crossbeams 10b are respectively a first crossbeam 11 and a second crossbeam 12, and the two longitudinal beams 10c are respectively a first longitudinal beam 13 and a second longitudinal beam 14. The first crossbeam 11, the first longitudinal beam 13, the second crossbeam 12, and the second longitudinal beam 14 are connected end-to-end to form the beam body 10, which is approximately rectangular. The first crossbeam 11 and the second crossbeam 12 extend along the width direction of the vehicle 1000, and the first longitudinal beam 13 and the second longitudinal beam 14 extend along the length direction of the vehicle 1000. That is, the length directions of the first crossbeam 11 and the second crossbeam 12 are both parallel to the Y-axis direction, and the length directions of the first longitudinal beam 13 and the second longitudinal beam 14 are both parallel to the X-axis direction. The first crossbeam 11 is a straight beam or a curved beam, the second crossbeam 12 is a straight beam or a curved beam, the first longitudinal beam 13 is a straight beam or a curved beam, and the second longitudinal beam 14 is a straight beam or a curved beam. The first crossbeam 11, the first longitudinal beam 13, the second crossbeam 12, and the second longitudinal beam 14 are all provided with cavities 10a.

[0065] When the subframe 100 is installed on the body 200, the first crossbeam 11 is located on the front side, the second crossbeam 12 is located on the rear side, the first longitudinal beam 13 is located on the left side, and the second longitudinal beam 14 is located on the right side.

[0066] The cross-section of beam 10 is square. The cross-section of beam 10 refers to the section cut along a reference plane, which is perpendicular to the length direction of beam 10. The cross-sections of the two crossbeams 10b and the two longitudinal beams 10c have the same shape. The cross-section of any one of the crossbeams 10b or any one of the longitudinal beams 10c can represent the cross-section of beam 10.

[0067] For example, refer to Figure 3 and Figure 4 Taking the first longitudinal beam 13 as an example, the first longitudinal beam 13 includes a top wall 102, a bottom wall 103, an outer wall 104, and an inner wall 105. The top wall 102, outer wall 104, bottom wall 103, and inner wall 105 are connected end to end to enclose a cavity 10a. The top wall 102 and bottom wall 103 are opposite each other along the height direction of the beam 10, and the outer wall 104 and inner wall 105 are opposite each other along the width direction of the beam 10. The top wall 102 is located on the side of the beam 10 away from the ground, and the bottom wall 103 is located on the side of the beam 10 facing the ground. The beam 10 is approximately rectangular, with the inner wall 105 facing the rectangular space enclosed by the beam 10, and the outer wall 104 facing away from the rectangular space enclosed by the beam 10. The partition 20 is square, and its four sides are respectively connected to the inner surface of the top wall 102, the inner surface of the outer wall 104, the inner surface of the bottom wall 103, and the inner surface of the inner wall 105.

[0068] Alternatively, the cross-section of the beam 10 may be a regular shape such as a circle, ellipse, triangle, or trapezoid, or the cross-section of the beam 10 may be an irregular shape. The shape of the partition 20 is the same as the shape of the cross-section of the beam 10, so that the side of the partition 20 is connected to the inner wall of the beam 10, thereby increasing the sealing of the receiving cavity 101.

[0069] refer to Figure 2 , Figure 3 and Figure 4 A separator 20 is disposed within the cavity 10a, dividing the cavity 10a into at least two receiving cavities 101, at least one of which is used to contain gas. The receiving cavity 101 for containing gas is a sealed cavity, and the gas stored in the receiving cavity 101 can be supplied to gas-using equipment.

[0070] For example, the separator 20 is disposed within the cavity 10a of at least one of the following components: a first crossbeam 11, a second crossbeam 12, a first longitudinal beam 13, and a second longitudinal beam 14.

[0071] Exemplarily, the number of separators 20 is one or more. When there is only one separator 20, the separator 20 divides the cavity 10a into two receiving cavities 101, and then seals the receiving cavities 101 to store gas. For example, the separator 20 is disposed within the cavity 10a of the first longitudinal beam 13, dividing the cavity 10a of the first longitudinal beam 13 into two receiving cavities 101. To seal the receiving cavities 101, the first end of the first longitudinal beam 13 is sealed, forming a sealed receiving cavity 101 between the first end of the first longitudinal beam 13 and the separator 20. The second end of the first longitudinal beam 13 is sealed, forming another sealed receiving cavity 101 between the second end of the first longitudinal beam 13 and the separator 20. The two receiving cavities 101 are used to store gases of different pressures, for example, one receiving cavity 101 is used to store high-pressure gas, and the other receiving cavity 101 is used to store low-pressure gas.

[0072] Optionally, the receiving cavity 101 is also used to house a sensing module (not shown). The sensing module is connected to the control device and is used to detect the gas pressure and / or temperature, etc. The sensing module includes devices such as a pressure sensor and / or a temperature sensor. The pressure sensor is used to detect the gas pressure, and the temperature sensor is used to detect the gas temperature, etc. After receiving the pressure information and / or temperature information detected by the sensing module, the control device confirms whether the gas pressure is within the normal range based on the pressure indicated by the pressure information, and / or confirms whether the gas temperature is within the normal range based on the temperature indicated by the temperature information.

[0073] Optionally, the first end of the first longitudinal beam 13 is sealed using a sealing cover plate (not shown), for example, by welding the sealing cover plate to the first end of the first longitudinal beam 13, or by connecting the sealing cover plate to the first end of the first longitudinal beam 13 by means of threads. The sealing method of the second end of the first longitudinal beam 13 is the same as that of the first end of the first longitudinal beam 13.

[0074] The separator 20 and the beam 10 are integrally formed by casting. After casting, the sealing cover is then assembled to the beam 10. The separator 20 is located between the first and second ends of the first longitudinal beam 13, that is, the separator 20 is located in the middle of the cavity 10a. After the beam 10 is cast, it is difficult to place the separator 20 inside the beam 10, so the separator 20 and the beam 10 are cast as one piece. During casting, two cores are placed in the mold cavity, with a first gap between the outer surface of the cores and the inner wall of the mold cavity, and a second gap between the two cores. Then, a solution is injected into the mold cavity, and the solution flows into the first and second gaps. The solution in the first gap cools to form the beam, and the solution in the second gap cools to form the separator. Finally, the cores are removed to form the receiving cavity.

[0075] A separator 20 requires two spaced-apart cores 600 to form a space. In this embodiment, the separator 20 is only provided in the middle of the cavity 10a. After casting, one or both ends of the cavity 10a can be selectively closed according to actual needs. This achieves both sealing of the receiving cavity 101, allowing the receiving cavity 101 to store gas, and reduces the number of cores required during the casting process.

[0076] Alternatively, two or more partitions 20 can be provided in the middle of the cavity 10a, that is, two or more partitions 20 can be provided between the two ends of the cavity 10a, to divide the cavity 10a into more receiving cavities 101. In this case, the receiving cavity 101 between two partitions 20 does not need to be sealed with an additional sealing cover. The receiving cavity 101 between the partitions 20 and the ends of the cavity 10a can be sealed with a sealing cover as needed. This achieves both sealing of the receiving cavity 101, allowing the receiving cavity 101 to store gas, and reduces the number of cores required in the casting process.

[0077] Alternatively, partitions 20 are provided at both ends and the middle of the cavity 10a to divide the cavity 10a into multiple sealed receiving cavities 101. For example, three partitions 20 are provided in the cavity 10a to divide the cavity 10a into two sealed receiving cavities 101, with one partition 20 located at one end of the cavity 10a, another partition 20 located at the other end of the cavity 10a, and a third partition 20 located between the first and second ends of the cavity 10a, that is, the third partition 20 located in the middle of the cavity 10a. All the partitions 20 are cast integrally with the beam body 10, eliminating the need for additional sealing cover plates after casting, thus simplifying the machining steps of the subframe 100.

[0078] When there are multiple partitions 20, some partitions 20 correspond to connectors 30, that is, along the length of the beam 10, the distance between partitions 20 and connectors 30 is less than or equal to a first threshold. Another part of the partitions 20 do not correspond to connectors 30, that is, the distance between this part of the partitions 20 and connectors 30 is not required, and the position of this part of the partitions 20 is set according to the volume of the receiving cavity 101.

[0079] refer to Figure 2 The connector 30 is connected to the outer surface of the beam 10 and is used to connect the functional component 400. For example, the connector 30 may be connected to the outer surface of the top wall 102, the outer surface of the outer wall 104, the outer surface of the bottom wall 103, or the outer surface of the inner wall 105.

[0080] Along the length of the beam 10, at least one connector 30 is positioned opposite the partition 20. This correspondence includes two scenarios: either the connector 30 and the partition 20 are completely offset but relatively close together, or the connector 30 and the partition 20 are at least partially opposite each other.

[0081] The following explanation uses projection to illustrate the positional relationship between connector 30 and separator 20. (Reference) Figure 5 Along the first direction, the separator 20 forms a projection area S1 on the beam 10, and the connector 30 forms a projection area S2 on the beam 10. The first direction is perpendicular to the length direction of the beam 10. Figure 3 and Figure 4 The diagram illustrates the connection 30 to the outer surface of the outer wall 104, with the first direction being the Y-axis direction. Along the length of the beam 10, the distance between the center line Q1 of the projection area S1 and the center line Q2 of the projection area S2 is a first distance L, which is less than or equal to a first threshold. The first threshold is not a fixed value; it is selected according to actual needs. For example, the first threshold may be 5 cm, 8 cm, or 10 cm.

[0082] like Figure 5 As shown in (a), the projection area S1 completely covers the projection area S2, and the first distance L is 0. That is, the center line Q1 of the projection area of ​​the separator 20 on the beam 10 coincides with the center line Q2 of the projection area of ​​the connector 30 on the beam 10. At this time, all parts of the connector 30 are opposite to the separator 20. Figure 5 As shown in (b), a portion of projection area S1 overlaps with a portion of projection area S2, while another portion of projection area S1 and another portion of projection area S2 are offset. The first distance L is not zero; for example, the first distance L can be 5 centimeters. At this time, a portion of connecting member 30 and a portion of separating member 20 are opposite each other. Figure 5 As shown in (c), the projection areas S1 and S2 are completely offset, with the first distance L being 0, for example, the first distance L is 15 centimeters. At this time, the connector 30 and the separator 20 are completely offset, but the distance between them is relatively close.

[0083] When the functional component 400 is connected to the connector 30, the connector 30 is subjected to a force applied by the functional component 400. The connector 30 transmits this force to the beam 10. Over time, the connection between the beam 10 and the connector 30 is prone to deformation or even cracking. In this embodiment, the position of the connector 30 is set to correspond to the position of the partition 20, so that the partition 20 strengthens the structural strength of the connection between the beam 10 and the connector 30, preventing deformation or even cracking at the connection point.

[0084] In this embodiment, the separator 20 divides the cavity 10a into multiple receiving cavities 101, so that the subframe 100 can store gas. It is not necessary to store all the gas required by the gas-using equipment in the gas tank. The amount of gas that the gas tank needs to store is reduced, and the volume of the gas tank can be reduced accordingly. In some cases, the gas tank may not even need to be set up. This prevents the gas tank from encroaching on the storage space and / or the passenger space, and reduces the weight and manufacturing cost of the terminal.

[0085] Furthermore, the subframe 100 is typically made of steel. Because steel has high structural strength, the outer diameter of each beam in the subframe 100 does not need to be large to ensure sufficient lateral stiffness. However, a steel subframe 100 is relatively heavy. To reduce the weight of the subframe 100, it can also be made of aluminum alloy. However, because aluminum alloy has lower structural strength than steel, the outer diameter of each beam in the subframe 100 needs to be increased to compensate for the structural strength loss caused by the material. In this embodiment, the partition 20 can also increase the structural strength of the subframe 100 without increasing the outer diameter of the beams 10 to ensure structural strength. The smaller outer diameter of the beams 10 reduces the volume of the subframe 100.

[0086] For example, the outer diameter of beam 10 is reduced, including a reduction in the height and / or width of beam 10. The rectangular space enclosed by the four beams of subframe 100 can be used to install components such as motors. With the width of beam 10 reduced, the volume of this rectangular space increases, allowing for the installation of a larger motor. The increased motor volume results in a corresponding increase in rated power and output torque, stronger overload capacity, and more stable operation. The reduced height of beam 10 saves space for increased luggage compartment volume.

[0087] In some possible embodiments, reference is made to Figure 3 and Figure 4 , Figure 3 and Figure 4 Taking the first longitudinal beam 13 as an example, the positional relationship between the partition 20 and the connector 30 is illustrated. Along a first direction, the partition 20 and the connector 30 are opposite each other, and this first direction is perpendicular to the length direction of the beam 10. For example, when the connector 30 is connected to the outer wall, the first direction is the width direction of the beam 10. That is, along the length direction of the beam 10, the distance between the partition 20 and the connector 30 is 0, and the orthographic projections of the partition 20 and the connector 30 on the beam 10 at least partially overlap. The partition 20 is positioned at the connection point between the beam 10 and the connector 30 to precisely increase the structural strength at the connection point.

[0088] For example, along the length of the beam 10, the size of the partition 20 is greater than or equal to the size of the connector 30. That is, along the first direction, the orthographic projection of the partition 20 onto the beam 10 completely covers the orthographic projection of the connector 30 onto the beam 10, so that the structural strength at all points where the beam 10 and the connector 30 are connected is enhanced.

[0089] Alternatively, along the length of the beam 10, the size of the partition 20 is smaller than the size of the connector 30. That is, along the first direction, the orthographic projection of the connector 30 onto the beam 10 completely covers the orthographic projection of the partition 20 onto the beam 10. This reduces the volume of the partition 20, decreases the space occupied by the partition 20, and increases the volume of the receiving cavity 101.

[0090] The following explanation uses functional component 400 as an example of suspension 400a.

[0091] refer to Figure 2 The suspension 400a includes a steering knuckle 410 and a link 420. The steering knuckle 410 is connected to the wheel 300, one end of the link 420 is connected to the steering knuckle 410, and the other end of the link 420 is connected to a connector 30. Exemplarily, the connector 30 is connected to the outer wall 104 or the top wall 102 of the beam 10 to facilitate the connection between the link 420 and the connector 30.

[0092] For example, refer to Figure 2 The suspension 400a's linkage 420 includes at least one of the following: a rear trailing arm 421, a camber arm 422, a toe arm 423, a front trailing arm 424, and a load-bearing arm 425. The rear trailing arm 421, in conjunction with the front trailing arm 424, constrains the fore-and-aft displacement of the wheel 300, buffering the rearward impact when the vehicle 1000 travels over bumpy roads and increasing the vehicle 1000's driving stability. The camber arm 422 controls the camber angle of the wheel 300, bearing the lateral centrifugal force when the vehicle 1000 turns, and improving tire grip during cornering. The toe arm 423 controls the toe angle of the wheel 300, constraining the lateral offset of the wheel 300 and preventing the vehicle 1000 from veering off course during straight-line travel. The front trailing arm 424 constrains the fore-and-aft displacement of the wheel 300, bearing the longitudinal force generated during acceleration or braking, and mitigating brake dive and acceleration nose-up.

[0093] The connector 30 includes at least one of the following: a rear trailing arm connector 31, a camber arm connector 32, a toe arm connector 33, a front trailing arm connector 34, and a load-bearing arm connector 35. The rear trailing arm connector 31 is used to connect the rear trailing arm 421, the camber arm connector 32 is used to connect the camber arm 422, the front toe arm connector 33 is used to connect the front toe arm 423, the front trailing arm connector 34 is used to connect the front toe arm 423, and the load-bearing arm connector 35 is used to connect the load-bearing arm 425.

[0094] The separator 20 includes at least one of the following: a first separator 21, a second separator 22, a third separator 23, a fourth separator 24, and a fifth separator 25.

[0095] Along the length of the beam 10, the position of the rear longitudinal arm connector 31 corresponds to the position of the first partition 21, the position of the lateral arm connector 32 corresponds to the position of the second partition 22, the position of the front toe arm connector 33 corresponds to the position of the third partition 23, the position of the front longitudinal arm connector 34 corresponds to the position of the fourth partition 24, and the positions of the load-bearing arm connector 35 and the fifth partition 25 correspond to each other.

[0096] The extension direction of the first partition 21 is the same as the extension direction of the rear trailing arm 421, the extension direction of the second partition 22 is the same as the extension direction of the camber arm 422, the extension direction of the third partition 23 is the same as the extension direction of the toe arm 423, the extension direction of the fourth partition 24 is the same as the extension direction of the front trailing arm 424, and the extension direction of the fifth partition 25 is the same as the extension direction of the load arm 425.

[0097] For example, the subframe 100 is a rear subframe 100, the first longitudinal beam 13 and the left rear wheel 300 are connected by a suspension 400a, and the second longitudinal beam 14 and the right rear wheel 300 are connected by another suspension 400a.

[0098] Optionally, the outer surfaces of the first longitudinal beam 13 and the second longitudinal beam 14 are each provided with a rear trailing arm connector 31, an outward camber arm connector 32, a front toe arm connector 33, a front trailing arm connector 34, and a load-bearing arm connector 35. The cavities 10a of the first longitudinal beam 13 and the second longitudinal beam 14 are each provided with a first partition 21, a second partition 22, a third partition 23, a fourth partition 24, and a fifth partition 25. The five partitions 20 divide the cavity 10a into six receiving cavities 101, with the four middle receiving cavities 101 formed by the intervals between adjacent partitions 20.

[0099] The longitudinal beam 10c can be a single-layer structure. In this case, the rear longitudinal arm connector 31, the load-bearing arm connector 35, the lateral arm connector 32, the front toe arm connector 33, and the front longitudinal arm connector 34 are sequentially connected to the outer surface of the longitudinal beam 10c.

[0100] Alternatively, refer to Figure 6The longitudinal beam 10c can be a double-layer structure. The longitudinal beam 10c includes a first part 15 and a second part 16, which are arranged along the height direction of the beam body 10 and are fixedly connected. Both the first part 15 and the second part 16 are provided with cavities 10a. Along the length direction of the beam body 10 (from back to front), the rear trailing arm connector 31, the camber arm connector 32, the front toe arm connector 33, and the front trailing arm connector 34 are sequentially connected to the outer surface of the first part 15, and the load-bearing arm connector 35 is connected to the outer surface of the second part 16. The load-bearing arm connector 35 is located between the camber arm connector 32 and the rear trailing arm connector 31.

[0101] Correspondingly, the first partition 21, the second partition 22, the third partition 23, and the fourth partition 24 are all disposed within the cavity 10a of the first part 15. The first partition 21 to the fourth partition 24 divide the cavity 10a of the first part 15 into multiple receiving cavities 101, which facilitates gas storage and increases the structural strength of the first part 15. The fifth partition 25 is disposed within the cavity 10a of the second part 16. The fifth partition 25 divides the cavity 10a of the second part 16 into multiple receiving cavities 101, which facilitates gas storage and increases the structural strength of the second part 16.

[0102] The second part 16 is located below the first part 15. The two ends of the first part 15 and the two ends of the second part 16 are fixedly connected. Exemplarily, the first part 15 and the second part 16 are fixedly connected by casting. The first part 15 is bent away from the second part 16, and the second part 16 is bent away from the first part 15. A clearance space is formed between the first part 15 and the second part 16 to allow clearance for the half-shaft.

[0103] The load-bearing arm connector 35 is connected to the second part 16, which is closer to the wheel 300. Correspondingly, the load-bearing arm connector 35 is also closer to the wheel 300, so that the load-bearing arm 425 is closer to the wheel 300, facilitating the load-bearing arm 425 to bear the load of the wheel 300 nearby. The camber arm connector 32 is connected to the first part 15, facilitating precise control of the camber angle of the wheel 300. The front trailing arm connector 34 and the rear trailing arm connector 31 are both connected to the first part 15 and are offset from the camber arm connector 32, allowing the front trailing arm 424 and the rear trailing arm 421 to better restrain the longitudinal force of the vehicle 1000 during acceleration or braking. The toe-in connector 33 is connected to the higher position of the first part 15, ensuring smooth toe-in changes of the wheel 300.

[0104] refer to Figure 3 and Figure 4 , Figure 3 and Figure 4The example uses the first longitudinal beam 13. When the connector 30 is used to connect with the link 420 of the suspension 400a, the connector 30 is connected to the outer surface of the longitudinal beam 10c, and the separator 20 is disposed within the cavity 10a of the longitudinal beam 10c. The first longitudinal beam 13 is provided with the connector 30 and the separator 20, and / or the second longitudinal beam 14 is provided with the connector 30 and the separator 20. The connector 30 of the first longitudinal beam 13 is used to connect with the link 420 of the suspension 400a of the left wheel 300, and the connector 30 of the second longitudinal beam 14 is used to connect with the link 420 of the suspension 400a of the right wheel 300. Along the length direction of the longitudinal beam 10c, the connector 30 is located in the middle of the longitudinal beam 10c, and the separator 20 is located in the middle of the longitudinal beam 10c.

[0105] The longitudinal beam 10c includes a first beam segment, a second beam segment, and a third beam segment connected sequentially along its length. The length of the first beam segment is 1 / 5 of the total length of the longitudinal beam 10c, the length of the second beam segment is 3 / 5 of the total length of the longitudinal beam 10c, and the length of the third beam segment is 1 / 5 of the total length of the longitudinal beam 10c. Optionally, the middle part of the longitudinal beam 10c refers to the second beam segment.

[0106] For example, the aforementioned load-bearing arm connector 35, camber arm connector 32, and toe arm connector 33 are all connected to the middle of the longitudinal beam 10c. Correspondingly, a second partition 22, a third partition 23, and a fourth partition 24 are provided within the cavity 10a. Alternatively, a second partition 22 may be provided within the cavity 10a, or a third partition 23 may be provided within the cavity 10a, or a fourth partition 24 may be provided within the cavity 10a, or both second and third partitions 22 and 23 may be provided within the cavity 10a, or both third and fourth partitions 23 and 24 may be provided within the cavity 10a.

[0107] During vehicle 1000's operation, the entire load of wheel 300 is transmitted to steering knuckle 410, and then from steering knuckle 410 to connecting rod 420 and finally to longitudinal beam 10c. In this process, the connecting member 30 in the middle of longitudinal beam 10c experiences the greatest lateral force, making the middle of longitudinal beam 10c the weakest point of the entire subframe 100. A partition 20 is installed in the middle of longitudinal beam 10c to strengthen the structural strength of the weakest point of the entire subframe 100, extend the lifespan of the subframe 100, and improve the safety factor of vehicle 1000.

[0108] For example, such as Figure 7As shown in (a), the extension direction of the separator 20 is the same as that of the connecting rod 420. The extension direction of the connecting rod 420 is the direction of the force exerted by the connecting rod 420 on the connecting member 30, and also the direction of the force exerted by the connecting member 30 on the beam 10. The separator 20 extends along the direction of the force, and can directly bear the force transmitted from the connecting rod 420, which greatly reduces the stress on the beam 10 and reduces the risk of deformation or cracking of the beam 10.

[0109] The fact that the extension direction of the separator 20 is the same as the extension direction of the connecting rod 420 means that the separator 20 includes a first surface 201 and a second surface 202. Along the length of the beam 10, the first surface 201 and the second surface 202 are arranged opposite to each other. The extension direction of the first surface 201 is the same as the extension direction of the connecting rod 420, and the extension direction of the second surface 202 is the same as the extension direction of the connecting rod 420. For example, the cross-section of the separator 20 perpendicular to the Z-axis is rectangular, and this cross-section is parallel to the plane formed by the Y-axis and X-axis directions.

[0110] Optionally, such as Figure 7 As shown in (b) or (c), the beam 10 includes a connecting portion 110, which, exemplarily, is part of the top wall 102 or part of the outer wall 104. A connector 30 is attached to the outer surface of the connecting portion 110. The separator 20 includes a first side 203 and a second side 204, which are opposite to each other, as shown in (b) or (c). Figure 7 As shown in (b) or (c), when the connecting portion 110 is part of the outer wall 104, the first side 203 and the second side 204 are the left and right sides of the separator 20. When the connecting portion 110 is part of the top wall 102, the first side 203 and the second side 204 are the upper and lower sides of the separator 20.

[0111] The width of the first side 203 is greater than the width of the second side 204. The width of the first side 203 refers to its dimension along the length of the beam 10, and the width of the second side 204 refers to its dimension along the length of the beam 10. For example, the cross-section of the partition 20 perpendicular to the Z-axis is trapezoidal, and this cross-section is parallel to the plane formed by the Y-axis and X-axis directions. The first side 203 is connected to the inner surface of the connecting portion 110, and the second side 204 is the side of the partition 20 away from the connecting portion 110. The first side 203 is the position where the partition 20 and the connecting portion 110 are directly connected; its larger width enhances the structural strength of the connecting portion 110. The second side 204 is away from the connecting portion 110; its smaller width serves to both separate the receiving cavity and supplement the strength of the connecting portion 110, while also reducing the volume of the partition 20.

[0112] In some possible embodiments, reference is made to Figure 8 The beam 10 is also equipped with an air inlet 106 and an air outlet 107. When the gas in the receiving cavity 101 is insufficient, an external gas source is connected to the air inlet 106 to replenish the gas in the receiving cavity 101. When the gas in the receiving cavity 101 is sufficient, the air inlet 106 can be sealed with a sealing cap (not shown). The air outlet 107 is connected to the gas-using equipment 500 via a pipe, so that the receiving cavity 101 can supply gas to the gas-using equipment.

[0113] Optionally, such as Figure 8 As shown in (a), when the multiple accommodating cavities 101 are not interconnected, each accommodating cavity 101 needs to correspond to at least one air inlet 106 and at least one air outlet 107.

[0114] Optionally, such as Figure 8 As shown in (b), the separator 20 is provided with a connecting hole 26, which connects two adjacent receiving cavities 101. At this time, the two receiving cavities 101 can share the air inlet 106 and the air outlet 107 to reduce the number of air inlets 106 and air outlets 107 and reduce the impact of air inlets 106 and air outlets 107 on the structural strength of the subframe 100.

[0115] For example, refer to Figure 9 When the longitudinal beam 10c is a single-layer structure, and the subframe 100 includes the aforementioned first partition 21, second partition 22, third partition 23, fourth partition 24, and fifth partition 25, a total of four receiving cavities 101 are formed between the first partition 21 and the fifth partition 25. For ease of description, the four receiving cavities 101 are respectively referred to as the first receiving cavity 101a, the second receiving cavity 101b, the third receiving cavity 101c, and the fourth receiving cavity 101d. Because the distance between two adjacent partitions is relatively small, the volume of the four receiving cavities 101 is relatively small, and gas at the same pressure may need to be stored in multiple receiving cavities 101. For example, if the first and second accommodating cavities 101a and 101b are both used to store low-pressure gas, and the third and fourth accommodating cavities 101c and 101d are both used to store high-pressure gas, then a connecting hole 26 can be provided on the fifth partition 25 to connect the first and second accommodating cavities 101a and 101b, allowing them to share the air inlet 106 and air outlet 107. Similarly, a connecting hole 26 can be provided on the third partition 23 to connect the third and fourth accommodating cavities 101c and 101d, allowing them to share the air inlet and air outlet. This satisfies the gas storage requirements while reducing the number of air inlets 106 and air outlets 107, thus minimizing the impact on the structural strength of the subframe 100.

[0116] For example, the first receiving cavity 101a is used to store high-pressure gas, and the second receiving cavity 101b, the third receiving cavity 101c and the fourth receiving cavity 101d are all used to store low-pressure gas. A connecting hole 26 can be provided on the second partition 22 and the third partition 23 to connect the second receiving cavity 101b, the third receiving cavity 101c and the fourth receiving cavity 101d, so that the second receiving cavity 101b, the third receiving cavity 101c and the fourth receiving cavity 101d can share the air inlet 106 and the air outlet 107.

[0117] In some possible embodiments, reference is made to Figure 3 and Figure 4 The beam body 10 is also provided with a process hole 108, which is connected to the receiving cavity 101. Figure 3 and Figure 4 The diagram shows the first longitudinal beam 13 of the beam body 10, on which a process hole 108 is schematically shown. Along the length of the beam body 10, the distance between the process hole 108 and the connector 30 is greater than or equal to a second threshold. This second threshold is not a fixed value; designers can select it based on actual conditions. The process hole 108 facilitates the removal of the core used in the casting of the subframe 100. Ensuring that the distance between the process hole 108 and the connector 30 is greater than or equal to the second threshold ensures a sufficient distance between them, preventing the process hole 108 from affecting the structural strength of the connection between the beam body 10 and the connector 30.

[0118] Optionally, the process hole 108 is provided on the bottom wall 103 of the beam 10. When cleaning the core, the bottom wall 103 faces the ground and the top wall 102 faces away from the ground, so that the core can fall out of the receiving cavity 101 naturally under the action of gravity.

[0119] Alternatively, the process hole 108 is provided on the top wall 102 of the beam 10. When cleaning the core, the subframe 100 is flipped so that the top wall 102 faces the ground and the bottom wall 103 faces away from the ground, so that the core can fall out of the receiving cavity 101 naturally under the action of gravity.

[0120] Alternatively, the process hole 108 is provided on the inner wall 105 or the outer wall 104 of the beam 10.

[0121] In some possible embodiments, reference is made to Figure 10 The subframe 100 also includes a seal 120, which is used to seal the process hole 108. After the core 600 is removed through the process hole 108, the process hole 108 is sealed by the seal 120, so that the receiving cavity 101 becomes a sealed cavity, which facilitates the storage of gas in the receiving cavity 101.

[0122] For example, to increase the convenience of sealing the process hole 108, the beam body 10 is provided with a protrusion 40.

[0123] In one example, such as Figure 10 As shown in (a), a protrusion 40 protrudes from the inner surface of the beam 10, and at least a portion of the process hole 108 is disposed in the protrusion 40. The beam 10 also has a sealing hole 109, one end of which communicates with the process hole 108, and the sealing hole 109 penetrates the outer surface of the beam 10. A sealing element 120 is fixed inside the sealing hole 109 by means of threaded connection or welding. When the process hole 108 is sealed using this method, the end face of the sealing element 120 is flush with the outer surface of the beam 10.

[0124] In another example, such as Figure 10 As shown in (b), the protrusion 40 protrudes from the outer surface of the beam 10, and the protrusion 40 is annular, surrounding the process hole 108. In this example, the seal 120 includes a first sealing part 121 and a second sealing part 122. The second sealing part 122 is plate-shaped, and the first sealing part 121 is annular. The first sealing part 121 is fixed to one side surface of the second sealing part 122. The first sealing part 121 surrounds the outer peripheral surface of the protrusion 40.

[0125] Optionally, the seal 120 and the protrusion 40 are threaded together. The inner surface of the first sealing part 121 is provided with an internal thread, and the outer peripheral surface of the protrusion 40 is provided with an external thread, and the internal thread and the external thread are screwed together. The second sealing part 122 and the end of the protrusion 40 away from the outer surface of the beam 10 are opposite each other.

[0126] Optionally, a sealant 130 is provided between the first sealing part 121 and the protrusion 40, and the sealant 130 is bonded between the inner surface of the first sealing part 121 and the outer peripheral surface of the protrusion 40.

[0127] Optionally, a sealing ring 140 is provided between the second sealing part 122 and the protrusion 40.

[0128] Optionally, the seal 120 and the protrusion 40 are welded together, and the welding method includes friction stir welding. In this case, the seal 120 includes a first sealing portion 121 and a second sealing portion 122, or the seal 120 includes only the second sealing portion 122.

[0129] This application embodiment also provides a processing technology for a subframe 100. The processing technology is used to process the subframe 100, which includes a beam 10 and a partition 20. The beam 10 is provided with a cavity 10a, and the partition 20 is disposed in the cavity 10a. The partition 20 divides the cavity 10a into at least two receiving cavities 101, and at least one receiving cavity 101 is used to contain gas.

[0130] refer to Figure 11 The processing technology includes: S100: Provide at least two cores 600. The cores 600 are used to prepare the receiving cavity 101.

[0131] Optionally, core 600 may include a sand core or a salt core.

[0132] For example, the core may be made by mixing quartz sand and a binder, etc.

[0133] For example, the salt core preparation process is as follows: sodium chloride, binder, and reinforcing agent are mixed into raw materials, and then the raw materials are die-cast into salt cores using die-casting equipment. Alternatively, a composite salt can be used instead of sodium chloride as the raw material.

[0134] Optionally, refer to Figure 12 The core 600 has a coating 610 on its surface. The coating 610 covers all areas of the outer surface of the core 600.

[0135] For example, when the core 600 is a sand core, the coating 610 is prepared by dip coating or spray coating. The coating 610 is made of a material that is resistant to high temperatures and does not easily react with the molten metal 900. After the coating 610 is prepared, the sand core is dried. The coating 610 also serves to isolate the molten metal 900 and the core 600, preventing direct contact between the molten metal 900 and the core 600 and preventing sintering. The coating 610 also facilitates the subsequent removal of the sand core.

[0136] For example, when the core 600 is a salt core, the coating 610 is prepared by spraying. The coating 610 is made of a material that is resistant to high temperatures and does not easily react with the molten metal 900. The coating 610 is both moisture-proof and prevents the salt core from reacting with the molten metal 900.

[0137] S101: Place at least two cores 600 within the mold cavity 710. A first gap 800 exists between the at least two cores 600 and the inner wall surface of the mold cavity 710, and a second gap 810 exists between two adjacent cores 600.

[0138] For example, the subframe 100 is machined using a mold, which includes an upper mold 720 and a lower mold 700, both of which have a mold cavity 710. At least two cores 600 are placed within the mold cavity 710 of the lower mold 700. A bracket 711 is provided within the mold cavity 710 of the lower mold 700 to support the cores 600, thereby maintaining a first gap 800 between the cores 600 and the inner wall surface of the mold cavity 710. A positioning mechanism is also provided within the mold cavity 710 to position the cores 600, ensuring accurate positioning of the cores 600.

[0139] Optionally, the bracket 711 is disposed at the location where the process hole 108 needs to be set on the beam 10, and the bracket 711 is also used to process the process hole 108. One end of the bracket 711 abuts against the inner wall surface of the mold cavity 710, and the other end of the bracket 711 abuts against the outer wall surface of the core 600.

[0140] Optionally, the inner wall of the mold cavity 710 is provided with a first forming groove 712, which surrounds the support 711. The first forming groove 712 is used to process the protrusion 40.

[0141] Optionally, the inner wall of the mold cavity 710 is also provided with a second forming groove (not shown in the figure), which is used to process the connecting part 30.

[0142] For example, a first interval 800 is used to form a beam 10, the width of which is equal to the wall thickness of the beam 10, and a second interval 810 is used to form a separator 20, the width of which is equal to the thickness of the separator 20.

[0143] S102: Inject molten liquid 900 into the mold cavity 710, so that the molten liquid 900 flows into the first interval 800 and the second interval 810.

[0144] Optionally, the melt 900 includes aluminum melt 900 or aluminum alloy melt 900.

[0145] Optionally, a low-pressure casting process is employed to allow the molten liquid 900 to be smoothly filled from the bottom of the mold cavity 710. During the injection of the molten liquid 900, the temperature change of the mold is monitored, and the mold temperature is fed back in real time via multi-point thermocouples.

[0146] For example, before injecting molten 900 into the mold cavity 710, the upper mold 720 and the lower mold 700 are closed. After the mold is closed, an airtightness test is performed to ensure that there are no leakage points in the mold cavity 710 and to prevent the molten 900 from leaking.

[0147] For example, the mold is preheated before the molten liquid 900 is injected into the mold cavity 710 to reduce the temperature difference between the molten liquid 900 and the mold, preventing cold shut defects. Optionally, during preheating, the temperature of the first region of the inner wall surface of the mold cavity 710 is higher than the temperature of the second region, and the distance between the first region and the injection port is smaller than the distance between the second region and the injection port. When the molten liquid 900 is injected into the mold cavity 710 from the injection port, it first flows to the first region and then flows to the second region. The preheating temperature of the first region is higher than the preheating temperature of the second region to prevent the molten liquid 900 from solidifying before flowing into the second region, ensuring that the molten liquid 900 flows smoothly to fill the mold cavity 710.

[0148] For example, molten metal 900 is formed by melting in a holding furnace. The molten metal 900 in the holding furnace is injected into the mold cavity 710 at a constant flow rate via an automatic pouring machine. During the injection of molten metal 900, gas in the mold cavity 710 is discharged through the mold's vent plug.

[0149] For example, the molten liquid 900 will also flow into the first forming tank 712.

[0150] For example, the melt 900 will also flow into the second forming tank.

[0151] S103: Cool the molten liquid 900 so that the molten liquid 900 in the first interval 800 forms a beam 10 and the molten liquid 900 in the second interval 810 forms a separator 20.

[0152] For example, the cooling time is determined based on the wall thickness of the beam 10, and the cooling rate is precisely controlled by the mold temperature control system.

[0153] For example, after the molten metal 900 is cooled, it undergoes solution treatment and then water quenching to form a supersaturated solid solution. This increases the structural strength of the subframe 100.

[0154] For example, water quenching can also remove risers and burrs.

[0155] For example, after the melt 900 cools, the melt 900 in the first forming tank 712 forms a protrusion 40.

[0156] For example, after the melt 900 cools, the melt 900 in the second forming tank forms the connector 30.

[0157] S104: Remove at least two cores 600 to form at least two receiving cavities 101 in the beam 10.

[0158] For example, before removing at least two cores 600, the subframe 100 needs to be removed from the mold cavity 710. After the bracket 711 and the subframe 100 are separated, process holes 108 will be formed on the beam 10.

[0159] Optionally, at least two cores 600 can be removed by vibration. Vibration is achieved using a vibratory core remover. Vibration is suitable for both salt cores and sand cores.

[0160] Optionally, at least two cores 600 can be removed by immersion in a cleaning solution. Exemplarily, the cores 600 include salt cores, and the cleaning solution includes water. Surfactants may be added to the water to reduce its surface tension and improve the dissolution efficiency of the salt cores. During the dissolution process, a circulating filtration system is used to remove salt and impurities from the water in real time. To improve dissolution efficiency, ultrasonic vibration of the cleaning solution can be used. After immersion, the subframe 100 can be dried, for example, by using clean, dry air provided by a dryer or fan to blow clean, dry air into the receiving cavity 101 of the subframe 100.

[0161] The processing technology provided in this embodiment uses a segmented core 600 to process the subframe 100, while simultaneously casting the beam 10 and the separator 20. The connection between the separator 20 and the beam 10 has high reliability, increasing the isolation between two adjacent receiving cavities 101 and improving the sealing performance of the receiving cavities 101. In the subframe 100 processed by the processing technology provided in this embodiment, the separator 20 can both divide the cavity 10a of the beam 10 into multiple receiving cavities 101 to facilitate the use of the beam 10 for gas storage and increase the structural strength of the weak points of the beam 10.

[0162] For example, after removing at least two cores 600, particles from the fragments of the cores 600 may remain on the inner wall surface of the receiving cavity 101. To remove these residual particles and increase the cleanliness of the inner wall surface of the receiving cavity 101, the above-described processing procedure further includes at least one of the following steps: S105: Rinse the receiving cavity 101 to remove any particles remaining in the receiving cavity 101. Whether the core 600 is removed by immersion in cleaning solution or by vibration, step S105 can be used to remove residual particles.

[0163] For example, a high-pressure water gun is used to flush the receiving cavity 101. The water sprayed from the high-pressure water gun enters the receiving cavity 101 through the process hole 108 to flush the receiving cavity 101, and residual particles are flushed out through the process hole 108. The water sprayed from the high-pressure water gun can be high-purity deionized water.

[0164] S106: Immerse the subframe 100 in the cleaning solution to dissolve any particles remaining on the inner wall of the receiving cavity 101. If the core 600 is removed by vibration, the remaining particles can be removed by immersion in the cleaning solution. Of course, if the core 600 is removed by immersion, and residual particles are found after the first immersion, a second immersion can be performed in step S107.

[0165] For example, when the core 600 includes a sand core, the cleaning fluid includes an alkaline solution. When the subframe 100 is made of a metal such as aluminum alloy, the alkaline solution can dissolve a layer of metal on the inner surface of the beam 10. As the metal on the inner surface of the beam 10 is dissolved, the particles adhering to it will fall off simultaneously.

[0166] When the core 600 includes a salt core, the cleaning solution includes water. Salt cores are easily soluble in water; when a salt core is used as the core, water can quickly remove residual particles, improving the cleanliness of the inner wall of the cavity.

[0167] You can choose to use either step S105 or step S106, or you can combine the two steps.

[0168] Steps S105 and S106 can both increase the cleanliness of the inner wall surface of the receiving cavity 101. A higher cleanliness of the inner wall surface of the receiving cavity 101 prevents foreign objects from entering the receiving cavity 101 and avoids foreign objects from entering the gas-using equipment and causing damage to the gas-using equipment.

[0169] For example, the above-described processing technology further includes the following step: shot peening the subframe 100 to remove surface oxide scale and burrs and improve surface quality.

[0170] In some possible embodiments, after removing the core 600, the above-described processing steps further include: inspecting the quality of the subframe 100. For example, inspecting the dimensions, appearance, or internal defects of the subframe 100. Optionally, dimensional checks are performed using a coordinate measuring machine (CMM), for example, to verify the accuracy of the holes and surfaces of the subframe 100. Appearance checks primarily focus on defects such as surface cracks, cold shuts, or shrinkage cavities. Internal defects are detected using an X-ray flaw detector, with a focus on the airtightness of the cavity 101 and the uniformity of the beam 10's wall thickness. Optionally, metallographic analysis and mechanical property tests are performed at key load locations.

[0171] In some possible embodiments, after removing the core 600, the above-described processing further includes sealing the process hole 108 with a sealant 120. A gas-tightness test can then be performed on the receiving cavity 101.

[0172] In addition, a few additional points need to be made regarding this application: I. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner for ease of understanding.

[0173] 2. The terms “comprising” and “having”, and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or modules is not necessarily limited to those steps or modules that are explicitly listed, but may include other steps or modules that are not explicitly listed or that are inherent to such process, method, product, or device.

[0174] 3. Unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. In this application, "and / or" is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0175] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A subframe, characterized in that, include: Beams, partitions, and connectors; The beam body is provided with a cavity, and the partition is disposed in the cavity, the partition dividing the cavity into at least two receiving cavities, at least one of the receiving cavities being used to contain gas; The connector is attached to the outer surface of the beam and is used to connect functional components; along the length of the beam, the position of at least one connector corresponds to the position of the separator.

2. The subframe according to claim 1, characterized in that, Along a first direction, the separator and the connector are opposite each other, and the first direction is perpendicular to the length direction of the beam.

3. The subframe according to claim 1 or 2, characterized in that, Along the length of the beam, the distance between the center line of the projection area of ​​the separator on the beam and the center line of the projection area of ​​the connector on the beam is a first distance, which is less than or equal to a first threshold.

4. The subframe according to any one of claims 1 to 3, characterized in that, The beam includes a longitudinal beam, and the longitudinal beam is provided with the cavity; the connector is connected to the outer surface of the longitudinal beam, and the partition is disposed in the cavity of the longitudinal beam; along the length direction of the longitudinal beam, the connector is located in the middle of the longitudinal beam, and the partition is located in the middle of the longitudinal beam.

5. The subframe according to any one of claims 1 to 4, characterized in that, The separator is provided with a connecting hole, which connects two adjacent receiving cavities.

6. The subframe according to any one of claims 1 to 5, characterized in that, The beam includes a connecting portion, and the connecting member is connected to the outer surface of the connecting portion. The separator includes a first side and a second side disposed opposite to each other. The first side is connected to the inner surface of the connecting portion, and the width of the first side is greater than the width of the second side.

7. The subframe according to any one of claims 1 to 6, characterized in that, The functional component includes a suspension, the connector is used to connect the links of the suspension, and the extension direction of the separator is the same as the extension direction of the links.

8. The subframe according to claim 7, characterized in that, The link includes at least one of the following: rear trailing arm, camber arm, toe arm, front trailing arm, and load-bearing arm; The connecting components include at least one of the following: a rear trailing arm connecting component, a camber arm connecting component, a toe arm connecting component, a front trailing arm connecting component, and a load-bearing arm connecting component; The partition includes at least one of the following: a first partition, a second partition, a third partition, a fourth partition, and a fifth partition; Along the length of the beam, the distance between the rear trailing arm connector and the first partition is less than or equal to the first threshold, the distance between the camber arm connector and the second partition is less than or equal to the first threshold, the distance between the toe arm connector and the third partition is less than or equal to the first threshold, the distance between the front trailing arm connector and the fourth partition is less than or equal to the first threshold, and the distance between the load-bearing arm connector and the fifth partition is less than or equal to the first threshold.

9. The subframe according to any one of claims 1 to 8, characterized in that, The beam body is also provided with a process hole, which is connected to the receiving cavity; Along the length of the beam, the distance between the process hole and the connector is greater than or equal to a second threshold.

10. The subframe according to claim 9, characterized in that, The subframe also includes a seal fixed to the beam to seal the process hole.

11. A terminal, characterized in that, The device includes a subframe and a pneumatic device as described in any one of claims 1 to 10, wherein the receiving cavity and the pneumatic device are connected by a pipe.

12. A manufacturing process for a subframe, characterized in that, The processing technology is used to process a subframe, which includes a beam and a partition; the beam has a cavity, and the partition is disposed in the cavity, dividing the cavity into at least two receiving cavities, at least one of which is used to contain gas; The processing technology includes: Provide at least two cores; The at least two cores are placed inside the mold cavity; there is a first gap between the at least two cores and the inner wall of the mold cavity, and a second gap between two adjacent cores; Molten liquid is injected into the mold cavity, allowing it to flow into the first and second gaps; The molten metal is cooled so that the molten metal in the first interval forms the beam, and the molten metal in the second interval forms the separator; Remove the at least two cores to form at least two receiving cavities in the beam.

13. The processing technology according to claim 12, characterized in that, The outer surface of the core is coated.

14. The processing technology according to claim 12 or 13, characterized in that, Removing the at least two cores includes: immersing the subframe in a cleaning solution to dissolve the cores; and / or, The at least two cores are removed by vibration.

15. The processing method according to any one of claims 12 to 14, characterized in that, After removing the at least two cores, the processing further includes rinsing the receiving cavity to remove residual particulate matter within the receiving cavity, the particulate matter being formed from the fragmentation of the cores.

16. The processing method according to any one of claims 12 to 15, characterized in that, After removing the at least two cores, the processing further includes immersing the subframe in a cleaning solution to remove residual particulate matter in the receiving cavity, the particulate matter being formed from the fragmentation of the cores.

17. The processing technology according to claim 16, characterized in that, The core includes a sand core, and the cleaning solution includes an alkaline solution.

18. The processing technology according to claim 16, characterized in that, The core includes a salt core, and the cleaning solution includes water.

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