Subframe and vehicle

Abstract

The utility model relates to a kind of auxiliary frame and vehicle.Auxiliary frame includes: main body, first crossbeam and second crossbeam, main body is hollow structure, first crossbeam and second crossbeam are respectively fixedly connected in the two ends of main body along front-back direction;Wherein, first crossbeam is solid structure, first crossbeam and main body are integrally formed piece, second crossbeam and the main body are split piece.The utility model can improve lightweight, and also can improve maintenance convenience, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a subframe and a vehicle. Background Technology

[0002] The subframe is the "skeleton reinforcement component" of a vehicle chassis. Although it does not directly bear the weight of the vehicle body, it plays a decisive role in suspension performance, handling stability, and comfort. With the development of vehicle technology, not only are higher performance requirements being placed on the vehicle, but also lower energy consumption.

[0003] While traditional steel subframes offer high strength, they fall short in terms of lightweight design and performance. Traditional one-piece hollow aluminum alloy subframes, on the other hand, improve both lightweighting and performance, but are difficult to maintain and require replacement of the entire subframe, resulting in high costs.

[0004] Therefore, how to balance the lightweight design of the subframe with ease of maintenance is a problem that needs to be solved. Utility Model Content

[0005] This utility model provides a subframe and vehicle that can improve weight reduction, enhance maintenance convenience, and reduce costs.

[0006] In a first aspect, this utility model provides a subframe, including a main body, a first crossbeam, and a second crossbeam. The main body is a hollow structure. The first crossbeam and the second crossbeam are respectively fixedly connected to both ends of the main body in the front-rear direction. The first crossbeam is a solid structure, the first crossbeam and the main body are integrally formed, and the second crossbeam and the main body are separate parts.

[0007] The beneficial effects of this utility model are as follows: the first crossbeam and the main body are integrally molded, the main body adopts a hollow structure, and the first crossbeam adopts a solid structure, that is, a hybrid structure of hollow and solid, which can not only meet the strength requirements of the subframe, but also reduce weight, improve lightweighting, and improve manufacturing efficiency; the second crossbeam and the main body are separate parts, when the second crossbeam needs to be repaired, only the second crossbeam needs to be broken, and then a new second crossbeam can be fixedly connected to the main body, without having to replace the entire subframe; or if the second crossbeam is defective during manufacturing and assembly, the second crossbeam can be replaced in time without scrapping the entire subframe; thus, maintenance and replacement are convenient and costs are reduced.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the subframe also includes a mounting block, which is fixedly connected to the main body and the second crossbeam. The mounting block, the main body, and the second crossbeam are all separate components.

[0010] The advantages of adopting the above-mentioned further solution are: the main body and the second crossbeam are fixedly connected by the mounting block, and the mounting block, main body, and second crossbeam are all separate components. This modular design facilitates the maintenance and replacement of each component. For example, when the mounting position of the main frame changes in different vehicles, another mounting block can be replaced. When different subframes require similar mounting structures, this mounting block can be flexibly applied to different subframes.

[0011] Furthermore, the subframe also includes a connector, the mounting block being fixedly connected to the main body via the connector, and the connector being used to be fixedly connected to the vehicle's main frame.

[0012] The advantages of adopting the above-mentioned further solution are: the mounting block is indirectly fixed to the main body through the connector, and when it is necessary to disassemble the mounting block, only the mounting block needs to be destroyed, and the main body is not affected, thus ensuring the reliability of the main body and reducing costs.

[0013] Furthermore, the mounting block includes a first connecting end and a second connecting end, the first connecting end being welded to the second crossbeam; wherein, the connector has two slots arranged opposite to each other, one end of the main body and the second connecting end respectively extending into the two slots and being welded to the connector respectively.

[0014] The beneficial effect of adopting the above-mentioned further solution is that one end of the main body and the second connecting end extend into the two slots respectively and are welded and fixed to the connecting parts respectively, which can improve the connection strength between the main body and the connecting parts and the connection strength between the mounting block and the connecting parts, thereby improving the reliability of the subframe.

[0015] Furthermore, the first connecting end is located on one side of the mounting block along the left-right direction, and the second connecting end is located on one side of the mounting block along the front-back direction.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the mounting block forms a roughly "right-angle" double-end connection with the main body and the second crossbeam, realizing the double-end detachable function and further improving the convenience of maintenance.

[0017] Furthermore, the main body is U-shaped, and the two ends of the second crossbeam along the left and right directions are respectively welded to the end of the main body through a mounting block. The main body, the second crossbeam and the two mounting blocks form a closed frame.

[0018] The beneficial effects of adopting the above-mentioned further solutions are that the closed-frame subframe can improve overall performance, such as rigidity, torque, and vibration reduction.

[0019] Furthermore, the subframe also includes a suspension bracket, which is fixedly connected to the main body, and the suspension bracket and the main body are separate components.

[0020] The advantages of adopting the above-mentioned further solution are: the suspension bracket and the main body are two independent components. When the assembly position changes, it can be replaced with another suspension bracket before the welding process, or the welding position can be changed, avoiding the need to reopen the mold and reducing manufacturing costs. If the suspension bracket has defects, such as its lugs (mounting lugs) as weak points, and quality defects occur during processing or after production, only the suspension bracket can be replaced, thereby reducing the subframe scrap rate and manufacturing costs.

[0021] Furthermore, the suspension bracket includes a connecting seat and a mounting lug, the connecting seat is welded to the main body, and the mounting lug is fixedly connected to the connecting seat.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the suspension bracket can be welded to the main body through the connecting seat, which can increase the welding area and improve the connection reliability.

[0023] Furthermore, the main body, the first crossbeam, and the second crossbeam are all made of aluminum alloy.

[0024] The advantages of adopting the above-mentioned further solutions are that the subframe is lighter and can still meet the strength and performance requirements.

[0025] Secondly, the present invention provides a vehicle comprising: a subframe as described in any embodiment of the first aspect. Attached Figure Description

[0026] Figure 1 A frontal view structural schematic diagram of the subframe provided in some embodiments of this utility model;

[0027] Figure 2 A structural schematic diagram of the subframe from the rear view for some embodiments of this utility model;

[0028] Figure 3 A schematic diagram of the subframe from a frontal view, provided for some embodiments of this utility model;

[0029] Figure 4 This is a side view structural schematic diagram of the subframe provided in some embodiments of the present invention;

[0030] Figure 5 for Figure 4 A magnified view of a portion of position A in the diagram;

[0031] Figure 6 A flowchart illustrating a method for manufacturing a subframe according to some embodiments of the present invention.

[0032] In the attached diagram, the components represented by each number are as follows:

[0033] 100-Subframe;

[0034] 10-Main Body;

[0035] 20 - First crossbeam;

[0036] 30 - Second crossbeam;

[0037] 40 - Mounting block; 41 - First connecting end; 42 - Second connecting end;

[0038] 50 - Connector; 51 - Groove; 52 - Horizontal plate; 53 - Vertical plate;

[0039] 60 - Suspension bracket; 61 - Connector; 62 - Mounting lug;

[0040] X - forward / backward direction; Y - left / right direction; Z - up / down direction. Detailed Implementation

[0041] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0042] Reference Figures 1 to 5 This utility model provides a subframe 100 for use in a vehicle. The subframe 100 can be a front subframe or a rear subframe of the vehicle. The subframe 100 is used to mount on the chassis (main frame) of the vehicle to support the suspension system connected to the wheels. In the following description, the subframe 100 is described using the front subframe as an example.

[0043] The vehicle can be a gasoline-powered vehicle or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid vehicles, hydrogen fuel cell vehicles, etc.

[0044] The subframe 100 provided by this utility model may include a main body 10, a first crossbeam 20 and a second crossbeam 30. The main body 10 is a hollow structure. The first crossbeam 20 and the second crossbeam 30 are respectively fixedly connected to the two ends of the main body 10 along the front-rear direction X. The first crossbeam 20 is a solid structure. The first crossbeam 20 and the main body 10 are integrally formed parts, and the second crossbeam 30 and the main body 10 are separate parts.

[0045] The first crossbeam 20 and the main body 10 are integrally molded components. The main body 10 has a hollow structure, while the first crossbeam 20 has a solid structure, employing a hybrid hollow and solid structure. This hybrid structure satisfies the strength requirements of the subframe 100 while reducing weight, improving lightweight design, and enhancing manufacturing efficiency. The second crossbeam 30 and the main body 10 are separate components. When the second crossbeam 30 needs repair, only the second crossbeam 30 needs to be broken down, and a new second crossbeam 30 can be fixedly connected to the main body 10, without replacing the entire subframe 100. Alternatively, if the second crossbeam 30 develops a defect during manufacturing and assembly, it can be replaced promptly without scrapping the entire subframe 100. This facilitates maintenance and replacement, reducing costs. In contrast, the hollow integral structure of the subframe 100 in related technologies has poor strength, is difficult to demold during casting, and requires the entire structure to be scrapped if defects are found, increasing costs.

[0046] In this invention, the front-to-back direction X represents the length of the vehicle body, the left-to-right direction Y represents the width of the vehicle body, and the up-and-down direction Z represents the height of the vehicle body. It is understood that the front-to-back direction X, the left-to-right direction Y, and the up-and-down direction can be perpendicular to each other.

[0047] The main body 10 is the part of the subframe 100 that provides a connection base for other components. The main body 10 has a hollow structure, which reduces weight. The term "hollow structure" can be understood as the main body 10 having an internal cavity, which can be a continuous cavity or an intermittent cavity. The first crossbeam 20 and the second crossbeam 30 both extend in the left-right direction Y.

[0048] The first crossbeam 20 can be fixedly connected to the front end of the main body 10. The first crossbeam 20 and the main body 10 can be integrally formed by a casting process, such as low-pressure casting. The first crossbeam 20 is a solid structure, which can improve strength, reduce mold opening difficulty, and improve casting efficiency. The term "solid structure" can be understood as the material completely filling the cross section, with no internal cavities, but micropores (sand holes) formed during the casting process are allowed. The main body 10 and the first crossbeam 20 can be made of aluminum alloy to improve lightweight and corrosion resistance.

[0049] The second crossbeam 30 can be fixedly connected to the rear end of the main body 10. For example, the second crossbeam 30 can be welded to the main body 10. It is worth noting that the "fixed connection" mentioned in this utility model can be welding, or mechanical fixing or adhesive fixing, provided that the strength requirements are met. Mechanical fixing can be bolt fixing, riveting fixing, etc., while adhesive fixing can use high-strength metal adhesive to reduce stress concentration.

[0050] The second crossbeam 30 and the main body 10 are separate components, meaning they are two independent parts, not integrally formed. The second crossbeam 30 can be welded to the main body 10 after the main body 10 and the second crossbeam 30 are integrally formed. The second crossbeam 30 can also have a hollow structure, such as a pultruded tube. The pultruded tube can be an aluminum alloy tube. In some embodiments, the subframe 100 further includes a mounting block 40, which fixes the main body 10 and the second crossbeam 30 together. The mounting block 40, the main body 10, and the second crossbeam 30 are all separate components.

[0051] Mounting block 40 can be fixed to the vehicle's main frame, either directly or indirectly via connector 50 described below.

[0052] Mounting block 40 and main body 10 are two independent components, and mounting block 40 and second crossbeam 30 are also two independent components. Mounting block 40 can be welded and fixed to main body 10 and second crossbeam 30 respectively. Mounting block 40 can be made of aluminum alloy. Mounting block 40 can be a hollow structure or a solid structure. Considering that mounting block 40 is subjected to large forces and has a small size, mounting block 40 adopts a solid structure.

[0053] The main body 10 and the second crossbeam 30 are fixedly connected by mounting block 40. Mounting block 40, the main body 10, and the second crossbeam 30 are all separate components, representing a modular design that facilitates maintenance and replacement of each part. For example, when the mounting position of the main frame changes in different vehicles, another mounting block 40 can be used. When different subframes 100 require similar mounting structures, this mounting block 40 can be flexibly applied to different subframes 100.

[0054] In some embodiments, the subframe 100 further includes a connector 50, and the mounting block 40 is fixedly connected to the main body 10 via the connector 50. The connector 50 is used to fixally connect to the main frame of the vehicle.

[0055] Mounting block 40 can be welded to connector 50, and connector 50 can be welded to main body 10. Connector 50 can be made of aluminum alloy.

[0056] Mounting block 40 is indirectly fixedly connected to the main body 10 through connector 50. When it is necessary to remove mounting block 40, only mounting block 40 needs to be destroyed, and the main body 10 is not affected, thus ensuring the reliability of the main body 10 and reducing costs.

[0057] In the above scheme, the mounting block 40 includes a first connecting end 41 and a second connecting end 42. The first connecting end 41 is welded to the second crossbeam 30. The connecting member 50 is in the shape of an "I" and includes two slots 51 that are opposite to each other in the front-back direction X. One end of the main body 10 and the second connecting end 42 are respectively located in the two slots 51 and are respectively welded and fixed to the connecting member 50.

[0058] Reference Figure 4 and Figure 5 The "I"-shaped connector 50 may include two horizontal plates 52 and a vertical plate 53 connecting the two horizontal plates 52. The horizontal plates 52 and the vertical plate 53 form two slots 51 facing away from each other in the front-back direction X. The horizontal plate 52 is a plate extending in the front-back direction X, and the vertical plate 53 is a plate extending in the vertical direction Z. The end of the main body 10 away from the first crossbeam 20 in the front-back direction X extends into one slot 51 and is welded and fixed to the horizontal plate 52 and the vertical plate 53. The second connecting end 42 of the mounting block 40 extends into the other slot 51 and is welded and fixed to the horizontal plate 52 and the vertical plate 53.

[0059] One end of the main body 10 and the second connecting end 42 extend into the two slots 51 respectively and are welded and fixed to the connector 50 respectively, which can improve the connection strength between the main body 10 and the connector 50 and the connection strength between the mounting block 40 and the connector 50, thereby improving the reliability of the subframe 100.

[0060] In the above scheme, the first connecting end 41 is located on one side of the mounting block 40 along the left-right direction Y, and the second connecting end 42 is located on one side of the mounting block 40 along the front-back direction X.

[0061] Thus, the mounting block 40 forms a roughly "right-angle" double-end connection with the main body 10 and the second crossbeam 30, realizing the double-end detachable function and further improving the convenience of maintenance.

[0062] In some embodiments, the main body 10 is U-shaped, and the two ends of the second crossbeam 30 along the left-right direction Y are respectively welded to the two ends of the main body 10 through a mounting block 40. The main body 10, the second crossbeam 30 and the two mounting blocks 40 form a closed frame.

[0063] The two ends of the main body 10 are U-shaped, located away from the two ends of the first crossbeam 20 in the front-rear direction X. Each mounting block 40 can be welded to the main body 10 through an I-shaped connector 50.

[0064] The closed-frame subframe 100 can improve overall performance, such as rigidity, torque, and vibration reduction.

[0065] In some embodiments, the subframe 100 further includes a suspension bracket 60, fixedly connected to the main body 10, wherein the suspension bracket 60 and the main body 10 are separate components. The suspension bracket 60 is used to support and mount the suspension device. The suspension bracket 60 can be welded to the main body 10. The suspension bracket 60 can be welded to the main body 10 after the main body 10 and the first crossbeam 20 are integrally formed.

[0066] The suspension bracket 60 and the main body 10 are two independent components. When the assembly position changes, it can be replaced with another suspension bracket 60 before the welding process, or the welding position can be changed, avoiding the need to reopen the mold and reducing manufacturing costs. If the suspension bracket 60 has defects, such as its lugs (mounting lugs 62) as weak points, and quality defects occur during processing or after production, only the suspension bracket 60 can be replaced, thereby reducing the scrap rate and manufacturing cost of the subframe 100.

[0067] In the above scheme, refer to Figure 1 and Figure 3 The suspension bracket 60 includes a connecting seat 61 and a mounting lug 62. The connecting seat 61 is welded to the main body 10, and the mounting lug 62 is fixedly connected to the connecting seat 61.

[0068] The connecting seat 61 and the mounting lug 62 can be integrally molded. The mounting lug 62 is used to connect the suspension device.

[0069] The suspension bracket 60 is welded to the main body 10 via the connecting seat 61, which increases the welding area and improves the reliability of the connection.

[0070] Reference Figure 6 This utility model also provides a method for manufacturing a subframe, including steps 210 and 220.

[0071] In step 210, the main body 10 and the first crossbeam 20 are formed by a one-piece casting process, wherein the main body 10 is a hollow structure and the first crossbeam 20 is a solid structure.

[0072] The main body 10 and the first crossbeam 20 can be formed using a low-pressure casting integral molding process. For example, by injecting molten aluminum alloy material into a mold, and then demolding the aluminum alloy material after it solidifies, a hollow and solid hybrid integral structure can be obtained.

[0073] In step 220, a second crossbeam 30 is provided and welded to the main body 10.

[0074] The second crossbeam 30 can be a high-strength extruded tube. The second crossbeam 30 is welded and fixed to the main body 10 using a welding process.

[0075] This invention first uses an integral casting process to form a hollow main body 10 and a solid first crossbeam 20, and then welds a second crossbeam 30 to the main body 10, so that the second crossbeam 30 and the main body 10 are two independent separate parts, thereby meeting the requirements of lightweight and strength, while also improving the convenience of maintenance and replacement and reducing maintenance costs.

[0076] In addition, the method may also include: providing a suspension bracket 60 and welding the suspension bracket 60 to the main body 10.

[0077] In the description of this utility model, it should be understood that the terms "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0080] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0082] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A subframe, characterized in that, include: The main body is a hollow structure; The first and second crossbeams are fixedly connected to the two ends of the main body along the front-rear direction, respectively. The first crossbeam is a solid structure, and the first crossbeam and the main body are integrally formed, while the second crossbeam and the main body are separate parts.

2. The subframe according to claim 1, characterized in that, The subframe also includes: The mounting block is fixedly connected to the main body and the second crossbeam. The mounting block, the main body, and the second crossbeam are all separate components.

3. The subframe according to claim 2, characterized in that, The subframe also includes: A connector is provided, wherein the mounting block is fixedly connected to the main body via the connector, and the connector is used to fixally connect to the main frame of the vehicle.

4. The subframe according to claim 3, characterized in that, The mounting block includes a first connecting end and a second connecting end, wherein the first connecting end is welded to the second crossbeam; The connector has two slots arranged opposite to each other. One end of the main body and the second connecting end extend into the two slots respectively and are welded to the connector respectively.

5. The subframe according to claim 4, characterized in that, The first connecting end is located on one side of the mounting block along the left-right direction, and the second connecting end is located on one side of the mounting block along the front-back direction.

6. The subframe according to claim 2, characterized in that, The main body is U-shaped, and the two ends of the second crossbeam along the left and right directions are respectively welded to the two ends of the main body through a mounting block. The main body, the second crossbeam and the two mounting blocks form a closed frame.

7. The subframe according to claim 1, characterized in that, The subframe also includes: A suspension bracket is fixedly connected to the main body, and the suspension bracket and the main body are separate components.

8. The subframe according to claim 7, characterized in that, The suspension bracket includes a connecting seat and a mounting lug. The connecting seat is welded to the main body, and the mounting lug is fixedly connected to the connecting seat.

9. The subframe according to claim 1, characterized in that, The main body, the first crossbeam, and the second crossbeam are all made of aluminum alloy.

10. A vehicle, characterized in that, include: The subframe as described in any one of claims 1-9.

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