Subframe and vehicle

Abstract

This invention relates to the field of automotive component technology, specifically a subframe and vehicle. The subframe includes a first upper crossbeam, a second upper crossbeam, an upper longitudinal beam, a lower crossbeam, a lower longitudinal beam, and a first suspension structure. Two upper longitudinal beams are arranged laterally opposite each other and arched upwards. One end of each upper longitudinal beam is connected to the first upper crossbeam, and the other end of each upper longitudinal beam is connected to the second upper crossbeam. The first upper crossbeam, the second upper crossbeam, and the two upper longitudinal beams constitute an upper frame. The lower crossbeam and the lower longitudinal beam are respectively disposed below the second upper crossbeam and the upper longitudinal beam. Two lower longitudinal beams are connected to the lower crossbeam, and the lower crossbeam and the two lower longitudinal beams constitute a lower frame. The lower frame is connected to the upper frame at both ends of the first upper crossbeam and to the upper frame at both ends of the lower crossbeam. The first suspension structure is connected to both the upper and lower frames. This invention can simultaneously address the requirements of subframe performance, lightweight design, and reduced manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and more specifically, to a subframe and a vehicle. Background Technology

[0002] The subframe is a crucial component of the suspension system. It primarily connects the suspension to the vehicle body, providing mounting points for suspension control arms, stabilizer bars, and other suspension components such as the powertrain. It also isolates road vibrations, thereby improving ride comfort. Therefore, the subframe bears various forces and torques during vehicle operation, requiring high rigidity and modal characteristics. Typically, an all-aluminum cast subframe is used, which has higher manufacturing and development costs and is also heavier.

[0003] In particular, with the development of new energy technologies, such as rear-wheel drive pure electric vehicles, the integrated design of the rear-drive motor and reducer in the power system results in a large volume, heavy weight, and complex geometric features. Consequently, electric vehicles require higher rigidity and modal characteristics from the subframe. Currently, the performance requirements of the subframe are generally met by simply increasing its material thickness and adding mounting brackets. This results in a complex structure and heavy weight, which is not conducive to lightweight vehicle design. Alternatively, an all-cast aluminum subframe can be manufactured to meet the corresponding requirements, but this requires the creation of new molds, resulting in a long development cycle and high development costs. Summary of the Invention

[0004] The present invention aims to address, to some extent, the problem in related technologies of how to balance the performance of the subframe, its lightweight design, and the reduction of manufacturing costs.

[0005] To at least partially solve at least one aspect of the above problems, in a first aspect, the present invention provides a subframe, including a first upper crossbeam, a second upper crossbeam, an upper longitudinal beam, a lower crossbeam, a lower longitudinal beam, and a first suspension structure;

[0006] The two upper longitudinal beams are arranged opposite each other in the transverse direction and arched upwards. One end of each of the two upper longitudinal beams is connected to the first upper crossbeam in the longitudinal direction, and the other end of each of the two upper longitudinal beams is connected to the second upper crossbeam in the longitudinal direction. The first upper crossbeam, the second upper crossbeam and the two upper longitudinal beams constitute the upper shelf.

[0007] The lower crossbeam and the lower longitudinal beam are respectively disposed below the second upper crossbeam and the upper longitudinal beam. The two lower longitudinal beams are respectively connected to the lower crossbeam. The lower crossbeam and the two lower longitudinal beams constitute the lower shelf. The lower shelf is connected to the upper shelf at both ends of the first upper crossbeam and to the upper shelf at both ends of the lower crossbeam.

[0008] The first suspension structure is connected to the upper shelf and the lower shelf respectively.

[0009] Optionally, the first suspension structure includes a first suspension sleeve and a first sleeve seat, the first sleeve seat being at least partially located between the upper shelf and the lower shelf, and connected to the upper shelf and the lower shelf respectively, the first suspension sleeve passing through the first sleeve seat and connected to the first sleeve seat.

[0010] Optionally, the first sleeve includes multiple plates, and at least one of the upper frame and the lower frame forms a box structure with the multiple plates;

[0011] And / or, the first sleeve seat is located between the upper longitudinal beam and the lower longitudinal beam, and is disposed near the connection between the upper longitudinal beam and the second upper transverse beam, and the axial direction of the first suspension sleeve extends along the transverse direction;

[0012] And / or, the first suspension structure further includes a first reinforcing member, which is connected to the upper frame, the lower frame and the first sleeve seat respectively;

[0013] When the first sleeve seat is located near the connection between the upper longitudinal beam and the second upper cross beam and the subframe is used to connect with the vehicle's lateral stabilizer bar, the first reinforcement is located on the side of the first sleeve seat away from the first upper cross beam along the longitudinal direction, and the first reinforcement is connected to the lateral stabilizer bar.

[0014] Optionally, the first upper crossbeam includes multiple crossbeam plates, which are connected to form a first cavity structure. The first cavity structure is connected to the upper longitudinal beam and the lower longitudinal beam at any end along the transverse direction.

[0015] And / or, the subframe further includes a second suspension structure, the second suspension structure being mounted on the first upper crossbeam; when the first upper crossbeam includes a plurality of the crossbeam plates, and the subframe further includes the second suspension structure, the second suspension structure is inserted through the crossbeam plates along the longitudinal direction.

[0016] Optionally, along the transverse direction, the first cavity structure includes a middle section and set sections located at both ends of the middle section; along the longitudinal direction near the second upper crossbeam, the first cavity structure includes a first side plate and a second side plate arranged sequentially; within the set sections, along the direction away from the middle section, the distance between the first side plate and the second side plate gradually increases;

[0017] And / or, the first cavity structure is provided with a setting plate at at least one end along the transverse direction, the setting plate being connected to the upper longitudinal beam and the first cavity structure respectively, and the setting plate extending along the extension direction of the upper longitudinal beam toward the side closer to the second upper transverse beam.

[0018] Optionally, the plurality of beam plates include a first beam plate and a second beam plate. The first beam plate includes an integrally formed first top plate and a first side plate. The second beam plate includes an integrally formed first bottom plate and a second side plate. The first top plate is located above the first bottom plate. The first top plate is connected to the upper end of the second side plate. The first side plate is connected to the end of the first bottom plate away from the second upper beam.

[0019] At least one of the upper longitudinal beams and the lower longitudinal beams is connected to the first crossbeam plate, and the upper longitudinal beam and the lower longitudinal beam are respectively connected to the second crossbeam plate;

[0020] When the first cavity structure includes the set section, within the set section, along the direction away from the middle section, the distance from a point on the first side plate to the second upper crossbeam gradually increases;

[0021] When the first cavity structure is provided with the setting plate, the setting plate is integrally formed on the first crossbeam plate.

[0022] Optionally, the lower longitudinal beam includes a first main board, which is disposed facing the upper longitudinal beam. The two ends of the first main board are respectively connected to the first upper crossbeam and the lower crossbeam. The first main board is provided with a first reinforcing structure and is connected to the upper longitudinal beam near the first upper crossbeam through the first reinforcing structure.

[0023] Optionally, one end of the first motherboard extends below the first upper crossbeam and is connected to the first upper crossbeam; the first reinforcing structure includes a first reinforcing edge, the first reinforcing edge being located at the outer end of the first motherboard along the lateral direction, the first reinforcing edge including a first connecting plate portion disposed near the first upper crossbeam, the first connecting plate portion being located on the outer side of the first upper crossbeam along the lateral direction, and the first connecting plate portion being connected to the upper longitudinal beam.

[0024] And / or, the first motherboard is further provided with a second reinforcing structure, the second reinforcing structure including a second reinforcing edge located at the inner end of the first motherboard along the transverse direction, the second reinforcing edge being located on the side of the first motherboard opposite to the upper longitudinal beam.

[0025] Optionally, the upper longitudinal beam is formed by bending tubing; the upper longitudinal beam includes a main arch section, a transition connecting section and a transverse extension section arranged in sequence, the transverse extension section is located at the end of the upper longitudinal beam away from the second upper crossbeam, the transverse extension section and the main arch section are connected by the transition connecting section, the first upper crossbeam is connected to the main arch section, the transition connecting section and the transverse extension section respectively, and the end of the transverse extension section away from the main arch section is provided with a vehicle body connection point;

[0026] And / or, the second upper crossbeam is made of tubing, and both ends of the second upper crossbeam extend beyond the upper longitudinal beam and are provided with vehicle body connection points at the ends;

[0027] And / or, the lower crossbeam includes a lower crossbeam body, the cross-sectional shape of the lower crossbeam body is C-shaped, and the opening of the C-shaped structure is disposed along the longitudinal direction toward the first upper crossbeam;

[0028] And / or, the end of the upper longitudinal beam near the second upper transverse beam is in a vertical position higher than the first upper transverse beam in the vertical position;

[0029] And / or, the subframe is also provided with a connection interface for connecting to the vehicle's wheel suspension.

[0030] In a second aspect, the present invention provides a vehicle including the subframe described in the first aspect above.

[0031] Compared to existing technologies, in the subframe and vehicle of the present invention, the first upper crossbeam, the second upper crossbeam, and the two upper longitudinal beams constitute the upper frame. The lower crossbeam and the lower longitudinal beam are respectively disposed below the second upper crossbeam and the upper longitudinal beam. The lower crossbeam and the two lower longitudinal beams constitute the lower frame. The lower frame is configured to connect to the upper frame at both ends of the first upper crossbeam and to the upper frame at both ends of the lower crossbeam. Thus, the upper frame and the lower frame are connected to form the main structure of the subframe. Furthermore, the main structure can achieve a large span range in the vertical direction at the longitudinal beam portion composed of the upper and lower longitudinal beams and the crossbeam portion composed of the second upper and lower crossbeams. The main body of the subframe can obtain better basic rigidity and strength. Meanwhile, the upper longitudinal beam is designed to arch upwards, utilizing the strong vertical load resistance of the arch in the longitudinal middle. The longitudinal movement at both ends of the upper longitudinal beam is restricted by the first upper crossbeam, second upper crossbeam, lower crossbeam, and lower longitudinal beam. This ensures that the longitudinal beam portion of the main structure achieves good rigidity and strength, resulting in good load-bearing performance and excellent support for the powertrain mounted on the subframe. In some cases, such as when the subframe serves as a rear subframe, a relatively large gap can be achieved between the upper and lower longitudinal beams to allow the driveshaft connected to the wheels to pass through this gap. Furthermore, the first suspension structure is configured to connect to both the upper and lower frames. On one hand, the first suspension structure can be fixed to the upper and lower frames respectively, enhancing the reliability of its support for the vehicle's powertrain, such as the motor assembly. On the other hand, the first suspension structure enhances the load-bearing performance of the upper and lower frames at its location. The subframe of the present invention consists of an upper frame and a lower frame as its main structure, which can achieve better rigidity and strength, and can improve the support stability of the power system such as the motor assembly at the first suspension structure. On this basis, its weight is relatively low, which facilitates the lightweight design of the vehicle and also facilitates the manufacturing and forming of the main structure. For example, the components of the upper frame and the lower frame can be formed separately and then welded together to form the main structure, which can reduce manufacturing and development costs to a certain extent. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the subframe in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0034] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0035] Figure 4 This is a side view of the subframe in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure in an embodiment of the present invention, showing that the first and second crossbeam plates of the first upper crossbeam are both separated from the lower longitudinal beam, and the first sleeve seat is connected to the second upper crossbeam and the lower crossbeam respectively.

[0037] Figure 6 for Figure 5 A magnified view of a section at point C;

[0038] Figure 7 This is a schematic diagram of the subframe after removing one upper longitudinal beam in an embodiment of the present invention;

[0039] Figure 8 for Figure 7 A magnified view of a section at point D;

[0040] Figure 9 This is a schematic diagram of the subframe structure in another embodiment of the present invention;

[0041] Figure 10 for Figure 9 The diagram shows the connection interface on the subframe and its connection to the wheel suspension.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100-First upper crossbeam; 100a-Intermediate section; 100b-Setting section; 110-First crossbeam plate; 111-First top plate; 112-First side plate; 113-Setting plate; 120-Second crossbeam plate; 121-First bottom plate; 122-Second side plate; 123-First notch; 200-Second upper crossbeam; 300-Upper longitudinal beam; 310-Main arch section; 320-Transition connection section; 330-Transverse extension section; 400-Lower crossbeam; 410-Lower crossbeam body; 411-Straight beam section; 412-Inclined beam section; 420-Second reinforcing member; 500-Lower longitudinal beam; 510-First main plate; 520-First reinforcing structure; 521-First connecting plate; 530-The Second reinforcement structure; 600-First suspension structure; 610-First suspension sleeve; 620-First sleeve seat; 621-First plate; 6211-First plate body; 6212-Second plate body; 6213-Third plate body; 622-Second plate; 623-Third plate; 630-First reinforcement; 700-Second suspension structure; 810-Body connection point; 820-Connection interface; 821-First interface; 822-Second interface; 823-Third interface; 824-Fourth interface; 825-Fifth interface; 910-Rear stabilizer bar; 920-Lower spring arm; 930-First control arm; 940-Second control arm; 950-Toe-in bar; 960-Steering knuckle arm connecting rod. Detailed Implementation

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] In the description of this specification, the references to terms such as "embodiment," "one embodiment," "some implementations," "exemplary," and "one implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0047] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0048] In the attached figures, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis (where the arrow points) indicating up and the negative direction indicating down. The Y-axis represents the horizontal direction, designated as left and right, with the positive direction of the Y-axis (where the arrow points) indicating right and the negative direction indicating left. The X-axis represents the front and back direction, with the positive direction of the X-axis (where the arrow points) indicating front and the negative direction indicating back. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention.

[0049] like Figure 1 and Figure 4 As shown, in a first aspect, the present invention provides a subframe, including a first upper crossbeam 100, a second upper crossbeam 200, an upper longitudinal beam 300, a lower crossbeam 400, a lower longitudinal beam 500, and a first suspension structure 600;

[0050] Two upper longitudinal beams 300 are arranged opposite each other in the transverse direction and arched upwards. One end of each upper longitudinal beam 300 is connected to the first upper transverse beam 100 in the longitudinal direction, and the other end of each upper longitudinal beam 300 is connected to the second upper transverse beam 200 in the longitudinal direction. The first upper transverse beam 100, the second upper transverse beam 200 and the two upper longitudinal beams 300 constitute the upper frame.

[0051] The lower crossbeam 400 and the lower longitudinal beam 500 are respectively located below the second upper crossbeam 200 and the upper longitudinal beam 300. The two lower longitudinal beams 500 are respectively connected to the lower crossbeam 400. The lower crossbeam 400 and the two lower longitudinal beams 500 constitute the lower shelf. The lower shelf is connected to the upper shelf at both ends of the first upper crossbeam 100 and to the upper shelf at both ends of the lower crossbeam 400.

[0052] The first suspension structure 600 is connected to the upper shelf and the lower shelf respectively.

[0053] This specification mainly uses the example of a rear subframe and the first upper crossbeam 100 as the front crossbeam of the rear subframe to illustrate the content of the present invention. However, it should be understood that the subframe can also be a front subframe without violating the design concept of the present invention, and this is not a limitation.

[0054] The horizontal direction can be understood as the Y-axis direction in the diagram, the vertical direction can be understood as the X-axis direction in the diagram, and the vertical direction can be understood as the Z-axis direction in the diagram.

[0055] Thus, the first upper crossbeam 100, the second upper crossbeam 200, and the two upper longitudinal beams 300 constitute the upper frame. The lower crossbeam 400 and the lower longitudinal beam 500 are respectively located below the second upper crossbeam 200 and the upper longitudinal beam 300. The lower crossbeam 400 and the two lower longitudinal beams 500 constitute the lower frame. The lower frame is connected to the upper frame at both ends of the first upper crossbeam 100 and to the upper frame at both ends of the lower crossbeam 400. Thus, the upper frame and the lower frame are connected to form the main structure of the subframe. Furthermore, the main structure can achieve a large span range in the vertical direction at the longitudinal beam part composed of the upper longitudinal beam 300 and the lower longitudinal beam 500 and the crossbeam part composed of the second upper crossbeam 200 and the lower crossbeam 400. The main part of the subframe can obtain good basic rigidity and strength. Meanwhile, the upper longitudinal beam 300 is designed to arch upwards, utilizing the strong vertical load resistance of the arch shape in the longitudinal middle. The longitudinal movement of both ends of the upper longitudinal beam 300 is restricted by the first upper crossbeam 100, the second upper crossbeam 200, the lower crossbeam 400, and the lower longitudinal beam 500. This ensures that the longitudinal beam portion of the main structure achieves good rigidity and strength, resulting in good load-bearing performance and good support for the powertrain suspended by the subframe. In some cases, such as when the subframe serves as a rear subframe, a relatively large gap can be achieved between the upper longitudinal beam 300 and the lower longitudinal beam 500 to allow the driveshaft connected to the wheels to pass through this gap. Furthermore, by configuring the first suspension structure 600 to connect to both the upper and lower frames, it is possible to enhance the reliability of the first suspension structure 600 in supporting the vehicle's powertrain, such as the motor assembly, by fixing it to both the upper and lower frames. This also strengthens the load-bearing capacity of the upper and lower frames at the location of the first suspension structure 600. In this embodiment, the subframe, composed of the upper and lower frames, achieves good rigidity and strength, improving the stability of the first suspension structure 600 in supporting the powertrain, such as the motor assembly. Additionally, its relatively low weight facilitates lightweight vehicle design and the manufacturing of the main structure. For example, the components of the upper and lower frames can be individually formed and then welded together to form the main structure, reducing manufacturing and development costs to some extent.

[0056] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, optionally, the first suspension structure 600 includes a first suspension sleeve 610 and a first sleeve seat 620. The first sleeve seat 620 is at least partially located between the upper shelf and the lower shelf and is connected to the upper shelf and the lower shelf respectively. The first suspension sleeve 610 passes through the first sleeve seat 620 and is connected to the first sleeve seat 620.

[0057] At this point, in the vertical direction, the space between the upper and lower shelves can be used to arrange the first suspension structure 600. The upper end of the first suspension structure 600 is connected to the upper shelf, and the lower end is connected to the lower shelf, which can achieve good stress performance. The first suspension sleeve 610 has high stability for the suspension of the power system and can improve the passive lateral stiffness at the suspension point.

[0058] It should be noted that the first suspension sleeve 610 can extend laterally, in which case the first suspension structure 600 is located between the upper longitudinal beam 300 and the lower longitudinal beam 500. The first suspension sleeve 610 can also extend longitudinally, in which case the first suspension structure 600 is located between the second upper crossbeam 200 and the lower crossbeam 400, depending on the specific requirements.

[0059] like Figure 1 and Figure 2 As shown, it illustrates a situation where two first suspension structures 600 and one second suspension structure 700 are provided on the subframe. The two first suspension structures 600 are arranged opposite each other in the lateral direction, and the second suspension structure 700 is provided on the second upper crossbeam 200.

[0060] like Figure 9 and Figure 10 As shown, in another embodiment of the present invention, two first suspension structures 600 and two second suspension structures 700 are provided on the subframe. The specific connection or arrangement of the suspension structures and the power system can adopt relevant technologies, which will not be described in detail here.

[0061] Optionally, the first sleeve seat 620 is located between the upper longitudinal beam 300 and the lower longitudinal beam 500, and is provided near the connection between the upper longitudinal beam 300 and the second upper cross beam 200, and the axial direction of the first suspension sleeve 610 extends laterally.

[0062] At this time, the upper end of the first set of pipe seats 620 is connected to the second upper crossbeam 200 and / or the upper longitudinal beam 300, and the lower end of the first set of pipe seats 620 is connected to the lower crossbeam 400 and / or the lower longitudinal beam 500.

[0063] Figure 2 As shown, the upper end of the first set of tube base 620 is connected to the second upper crossbeam 200 and the upper longitudinal beam 300 respectively, and the lower end of the first set of tube base 620 is connected to the lower crossbeam 400. This will be explained in detail later with reference to specific embodiments.

[0064] Of course, in another scheme, when the first set of pipe seats 620 is located between the upper longitudinal beam 300 and the lower longitudinal beam 500, it can also be spaced apart from the connection between the upper longitudinal beam 300 and the second upper cross beam 200. In this case, a connection structure is set at the connection between the upper longitudinal beam 300 and the second upper cross beam 200, and it is connected to the upper shelf and the lower shelf respectively through the connection structure.

[0065] In this way, it is possible to avoid setting up additional connection structures at both ends of the upper longitudinal beam 300 to connect the upper and lower frames, or to reduce the structural requirements for the connection structure. While ensuring the structural rigidity of the main structure of the subframe, the overall weight of the subframe can be reduced to a certain extent.

[0066] In the above embodiments, optionally, a box structure is formed at the first tube seat 620 of the subframe. This box structure will be referred to as the first box structure. It should be noted that the first box structure can be formed by the first tube seat 620 itself, or it can be formed by the first tube seat 620 and its connected components.

[0067] Optionally, the first set of tube base 620 includes multiple plates, at least one of the upper shelf and the lower shelf, which together with the multiple plates form a first box structure.

[0068] like Figure 2 and Figure 6 As shown, exemplarily, the first sleeve seat 620 includes a first plate 621, a second plate 622, and a third plate 623 among its multiple plates. The first plate 621 includes a first plate body 6211, a second plate body 6212, and a third plate body 6213. Taking the first suspension sleeve 610 extending laterally along its axial direction as an example, and the first sleeve seat 620 located at the connection between the second upper crossbeam 200 and the upper longitudinal beam 300 as an example, the first plate body 6211 is located at the inner lateral end of the first box structure, and the second plate body 6212 is located at the end of the first box structure along its longitudinal direction near the first upper crossbeam 100. The third plate 6213 is located at the bottom end of the first box structure, the second plate 622 is located at the outer lateral end of the first box structure, and the third plate 623 is located at the end of the first box structure away from the first upper crossbeam 100. Both the second and third plates 622 and 623 are plate structures. The first, second, and third plates 621, 622, and 623 form a box-shaped structure with an open top. The top end connects to the upper shelf, and the bottom end connects to the lower shelf. In other words, the first, second, and third plates 621, 622, 623, and the upper shelf are connected to form the first box structure. For example, the upper end of the third plate 623 connects to the second upper crossbeam 200, and the upper ends of the first, second, and second plates 6211, 6212, and 622 are all connected to the upper longitudinal beam 300. The first suspension sleeve 610 passes laterally through the first plate 6211 and the second plate 622.

[0069] At this point, the upper part of the first box structure is formed by the upper shelf. Of course, it should be understood that the lower part of the first box structure can also be formed by the lower shelf, which will not be explained in detail here.

[0070] In this way, at least one of the upper and lower shelves can be used to form a first box structure with multiple panels, which is simple in structure and highly practical.

[0071] like Figure 2 and Figure 6 As shown, optionally, the first suspension structure 600 further includes a first reinforcing member 630, which is connected to the upper shelf, the lower shelf and the first sleeve seat 620 respectively.

[0072] The specific structure of the first reinforcing member 630 is not limited, but it is preferably a bent sheet metal part.

[0073] In this way, the stiffness and strength of the structure at the first sleeve seat 620 can be strengthened by the first reinforcing member 630.

[0074] Furthermore, when the first sleeve seat 620 is located near the connection between the upper longitudinal beam 300 and the second upper cross beam 200, and the subframe is used to connect with the vehicle's lateral stabilizer bar 910, the first reinforcing member 630 is located on the side of the first sleeve seat 620 that is longitudinally away from the first upper cross beam 100, and the first reinforcing member 630 is connected to the lateral stabilizer bar 910. Figure 10 (As shown).

[0075] Specifically, the first reinforcing member 630 is connected to the second upper crossbeam 200, the first sleeve seat 620, and the lower crossbeam 400, respectively.

[0076] The side of the first reinforcing member 630 facing away from the first upper crossbeam 100 is also used to connect with the mounting bracket of the lateral stabilizer bar 910, and the mounting bracket and the first reinforcing member 630 form a mounting cavity for mounting the lateral stabilizer bar 910.

[0077] Thus, the first reinforcing member 630 can not only strengthen the strength and rigidity of the first suspension structure 600, but also be used to install the lateral stabilizer bar 910. It has a simple structure and strong practicality.

[0078] like Figure 5 , Figure 7 and Figure 8 As shown, optionally, the first upper crossbeam 100 includes multiple crossbeam plates, which are connected to form a first cavity structure. The first cavity structure is connected to the upper longitudinal beam 300 and the lower longitudinal beam 500 at any end along the transverse direction.

[0079] The specific manner in which multiple crossbeam plates enclose the first cavity structure is not limited. For example, the two ends of the first cavity structure are connected to the upper longitudinal beam 300 and the lower longitudinal beam 500, respectively, and the upper longitudinal beam 300, the lower longitudinal beam 500 and multiple crossbeam plates together form the second box structure.

[0080] Thus, the first upper crossbeam 100 is composed of multiple crossbeam plates, which form the first cavity structure. Any one end of the crossbeam is connected to both the upper longitudinal beam 300 and the lower longitudinal beam 500. The first upper crossbeam 100 and the connection points at both ends can obtain better structural rigidity and modality. It also facilitates the manufacturing and forming of the first upper crossbeam 100 and its connection with the upper longitudinal beam 300 and the lower longitudinal beam 500.

[0081] Optionally, when the first upper crossbeam 100 includes multiple crossbeam plates, and the subframe also includes a second suspension structure 700, the second suspension structure 700 is longitudinally inserted into the crossbeam plates. The specific structure of the second suspension structure 700 can adopt relevant technologies, and it generally includes a second suspension sleeve, etc., which will not be described in detail here.

[0082] Thus, the second suspension structure 700 can achieve good structural stiffness at the first upper crossbeam 100, thereby providing good support for the power system.

[0083] like Figure 7 As shown, optionally, in the transverse direction, the first cavity structure includes a middle section 100a and a set section 100b located at both ends of the middle section 100a; in the longitudinal direction near the second upper crossbeam 200, the first cavity structure includes a first side plate 112 and a second side plate 122 arranged sequentially; within the set section 100b, in the direction away from the middle section 100a, the distance between the first side plate 112 and the second side plate 122 gradually increases.

[0084] Specifically, the cross-sectional area of ​​the intermediate section 100a is smaller than that of the set end, and here, the cross-section is parallel to the XZ plane. Longitudinally, the second side plate 122 is located on the side of the first side plate 112 closest to the second upper crossbeam 200. In any plane parallel to the XY plane, within the set section 100b, the farther the first side plate 112 is from the intermediate section 100a, the greater its distance to the second side plate 122. When a second suspension structure 700 is provided, the second suspension structure 700 is mainly located on the intermediate section 100a.

[0085] Thus, the first upper crossbeam 100 can achieve a relatively large cross-sectional area at both ends, and it can achieve a large contact area with the upper longitudinal beam 300 and the lower longitudinal beam 500. The connection strength at both ends of the first upper crossbeam 100 is high, and it is highly practical.

[0086] Optionally, the plurality of crossbeam plates include a first crossbeam plate 110 and a second crossbeam plate 120. The first crossbeam plate 110 includes an integrally formed first top plate 111 and a first side plate 112. The second crossbeam plate 120 includes an integrally formed first bottom plate 121 and a second side plate 122. The first top plate 111 is located above the first bottom plate 121. The first top plate 111 is connected to the upper end of the second side plate 122. The first side plate 112 is connected to the end of the first bottom plate 121 away from the second upper crossbeam 200.

[0087] At least one of the upper longitudinal beams 300 and the lower longitudinal beams 500 is connected to the first crossbeam plate 110, and the upper longitudinal beam 300 and the lower longitudinal beam 500 are respectively connected to the second crossbeam plate 120.

[0088] For example, the first top plate 111 and the first side plate 112 are both connected to the upper longitudinal beam 300, the second side plate 122 is connected to the upper longitudinal beam 300 and the lower longitudinal beam 500, and the first bottom plate 121 can be connected to the upper longitudinal beam 300 and / or the lower longitudinal beam 500. The following will be described in conjunction with specific embodiments.

[0089] Thus, the main structure of the first upper beam 100 can be formed by connecting the first crossbeam plate 110 and the second crossbeam plate 120, and it is convenient to connect the upper longitudinal beam 300 and the lower longitudinal beam 500 in the future. The structure is simple and highly practical.

[0090] In the above embodiments, optionally, when the first cavity structure includes a set section 100b, within the set section 100b, along the direction away from the middle section 100a, the distance from a point on the first side plate 112 to the second upper crossbeam 200 gradually increases.

[0091] Specifically, the first side plate 112 is set as an inclined plate at the set section 100b, which is inclined away from the second upper crossbeam 200. At this time, the second side plate 122 can be set as a flat plate. Within the set section 100b, the change in the longitudinal distance between the first side plate 112 and the second side plate 122 is mainly formed by the shape of the first side plate 112, which facilitates the forming of the second crossbeam plate 120.

[0092] In the above embodiments, optionally, a setting plate 113 is provided at at least one end of the first cavity structure along the transverse direction. The setting plate 113 is connected to the upper longitudinal beam 300 and the first cavity structure respectively. The setting plate 113 extends along the extension direction of the upper longitudinal beam 300 towards the side close to the second upper cross beam 200.

[0093] At this time, the projection of the setting plate 113 along the vertical direction falls at least partially on the side of the inner cavity of the first cavity structure near the second upper crossbeam 200. That is, the projection of the setting plate 113 is at least partially located on the side of the second side plate 122 near the second upper crossbeam 200.

[0094] Thus, the plate 113 extends along the extension direction of the upper longitudinal beam 300 towards the side closer to the second upper crossbeam 200. On the one hand, the plate 113 provides a larger contact area between the first upper crossbeam 100 and the upper longitudinal beam 300, resulting in higher stress stability at the connection point. On the other hand, it allows the first upper crossbeam 100 to achieve a relatively large height at both ends. The plate 113 can extend upwards as much as possible to the apex of the upper longitudinal beam 300, thereby improving the stiffness and strength of the first upper crossbeam 100. Correspondingly, it can improve the bending resistance of the upper longitudinal beam 300 to a certain extent.

[0095] Furthermore, when the first cavity structure is provided with a setting plate 113, the setting plate 113 is integrally formed on the first crossbeam plate 110.

[0096] Specifically, during the forming of the first crossbeam plate 110, a portion corresponding to the set plate 113 is formed.

[0097] like Figure 5 As shown, exemplarily, the first side plate 112 in the setting section 100b is inclined relative to the middle section 100a and tilted away from the second upper crossbeam 200. The first top plate 111 in the setting section 100b is inclined upward relative to the first bottom plate 121. The first top plate 111 and the first side plate 112 in the setting end are set at an angle with each other. The angle between them is obtuse, and the transition line between them is inclined relative to both the horizontal and vertical directions. For example, in the XY plane, the angle between the transition line and the X-axis direction and the Y-axis direction is 45°. The first top plate 111 of the setting section 100b extends generally along the extension direction of the upper longitudinal beam 300 to a part located above the second side plate 122 and on the side of the second side plate 122 close to the second upper crossbeam 200. This part forms the aforementioned setting plate 113.

[0098] In this way, the first top plate 111 of the first crossbeam plate 110 can be used to form the setting plate 113 without setting the setting plate 113 separately, which can meet the setting requirements of the setting plate 113 and also improve the structural rigidity of the first upper crossbeam 100 at the end plate.

[0099] In the above embodiments, optionally, when the subframe is used in a vehicle, the vertical distance between the upper end of the plate 113 and the vertex of the upper longitudinal beam 300 is defined as a first distance, and the distance from the lowest point of the upper longitudinal beam 300 to the vertex is defined as a second distance. The ratio of the first distance to the second distance is within a first ratio range. The first ratio range can be determined according to actual needs, for example, the first ratio range is 0.4-0.85, 0.5-0.8, or 0.6-0.7.

[0100] like Figure 3 , Figure 5 and Figure 8 As shown, optionally, the lower longitudinal beam 500 includes a first main board 510, which is disposed toward the upper longitudinal beam 300. The two ends of the first main board 510 are respectively connected to the first upper crossbeam 100 and the lower crossbeam 400. A first reinforcing structure 520 is disposed on the first main board 510, and the first reinforcing structure 520 is connected to the upper longitudinal beam 300 near the first upper crossbeam 100.

[0101] Thus, the two ends of the lower longitudinal beam 500 are connected to the first upper crossbeam 100 and the lower crossbeam 400 respectively, and are connected to the upper longitudinal beam 300 near the first upper crossbeam 100. This can further strengthen the connection strength at both ends of the first upper crossbeam 100, thereby improving the load-bearing performance of the subframe at the first upper crossbeam 100. At this time, the main body of the lower longitudinal beam 500 can be made of sheet metal, which has a simple structure and strong practicality.

[0102] Furthermore, one end of the first main board 510 extends below the first upper crossbeam 100 and is connected to the first upper crossbeam 100; the first reinforcing structure 520 includes a first reinforcing edge, which is located at the outer end of the first main board 510 in the lateral direction. The first reinforcing edge includes a first connecting plate portion 521 disposed near the first upper crossbeam 100. The first connecting plate portion 521 is located on the outer side of the first upper crossbeam 100 in the lateral direction and is connected to the upper longitudinal beam 300.

[0103] For example, the first base plate 121 has first notches 123 at both ends in the lateral direction. Specifically, in the lateral direction, both ends of the first base plate 121 are recessed into the second side plate 122, thereby forming two first notches 123. The first main plate 510 extends into the lower part of the first top plate 111 and covers the corresponding first notches 123. The end of the first main plate 510 away from the second upper crossbeam 200 is connected to the lower end of the first side plate 112. At this time, the first connecting plate part 521 is located outside the first notches 123 and the second side plate 122. The first connecting plate part 521 is connected to the upper longitudinal beam 300.

[0104] Preferably, the projection of the first connecting plate portion 521 along the lateral direction is at least partially located on the side of the second side plate 122 near the second upper crossbeam 200, so that the first connecting plate portion 521 and the upper longitudinal beam 300 can obtain a large contact surface and achieve a good reinforcing connection.

[0105] It should be understood that the first reinforcing edge is preferably formed by folding the outer lateral end of the first main board 510 upwards. The height of the first reinforcing edge is higher at the first connecting plate portion 521 and lower at other positions, which can be determined according to specific needs.

[0106] It should be understood that the width of the first motherboard 510 along the horizontal direction can be set to a gradual type. For example, it can be divided into three parts along the vertical direction. In the part near the two ends, the width along the horizontal direction gradually increases in the direction away from the middle part.

[0107] Optionally, the first motherboard 510 is further provided with a second reinforcing structure 530, which includes a second reinforcing edge located at the inner end of the first motherboard 510 along the transverse direction. The second reinforcing edge is located on the side of the first motherboard 510 opposite to the upper longitudinal beam 300. For example, the second reinforcing edge is formed by folding down the inner end of the first motherboard 510 in the transverse direction, which can achieve the reinforcing effect while avoiding interference with the first upper crossbeam 100.

[0108] like Figure 1 and Figure 3 As shown, optionally, the upper longitudinal beam 300 is formed by bending tubing; the upper longitudinal beam 300 includes a main arch section 310, a transition connection section 320 and a transverse extension section 330 arranged sequentially. The transverse extension section 330 is located at the end of the upper longitudinal beam 300 away from the second upper crossbeam 200. The transverse extension section 330 and the main arch section 310 are connected by the transition connection section 320. The first upper crossbeam 100 is connected to the main arch section 310, the transition connection section 320 and the transverse extension section 330 respectively. The end of the transverse extension section 330 away from the main arch section 310 is provided with a vehicle body connection point 810.

[0109] Specifically, the upper longitudinal beam 300 can be formed by bending a round tube, the second side plate 122 is connected to the main arch section 310, the first crossbeam plate 110 is connected to the main arch section 310, the transition connecting section 320 and the transverse extension section 330 respectively, and the first connecting plate portion 521 is connected to the main arch section 310, the transition connecting section 320 and the transverse extension section 330 respectively.

[0110] The body connection point 810 can be connected to the body using relevant technologies, such as using a bushing assembly, which will not be described in detail here.

[0111] This facilitates the sourcing and manufacturing of the upper longitudinal beam 300, and ensures the structural rigidity of the connection between the upper longitudinal beam 300 and the first upper cross beam 100, resulting in high reliability and strong practicality.

[0112] like Figure 2 As shown, optionally, the second upper crossbeam 200 is made of tubing, and both ends of the second upper crossbeam 200 extend beyond the upper longitudinal beam 300 and are provided with vehicle body connection points 810 at the ends.

[0113] Specifically, the second upper crossbeam 200 can be made of straight round tubes, which are easy to source and manufacture, have a simple structure, and are highly practical.

[0114] like Figure 5and Figure 6 As shown, optionally, the lower crossbeam 400 includes a lower crossbeam body 410, the cross-sectional shape of which is C-shaped, and the opening of the C-shaped structure is disposed longitudinally toward the first upper crossbeam 100.

[0115] Specifically, the lower crossbeam body 410 is formed by bending a plate, which is convenient for material sourcing and manufacturing. The design of its cross-sectional shape helps to improve the structural rigidity of the lower crossbeam 400. The plate body of the lower longitudinal beam 500 can overlap and weld with the lower side wall of the C-shaped structure to ensure its stress stability.

[0116] Optionally, the lower crossbeam 400 also includes a second reinforcing member 420, which is located on the side of the lower crossbeam body 410 away from the first upper crossbeam 100, and is connected to the lower crossbeam body 410.

[0117] For example, the lower crossbeam body 410 includes a straight beam segment 411 located in the middle and inclined beam segments 412 located at both ends. The inclined beam segments 412 are inclined relative to the straight beam segments 411 in the longitudinal direction towards the side closer to the first upper crossbeam 100. The second reinforcing member 420 is connected to the straight beam segment 411 and the inclined beam segment 412 respectively, and is also connected to the first sleeve seat 620. The lower end of the first reinforcing member 630 is connected to the second reinforcing member 420.

[0118] Thus, the structural strength at the end of the lower crossbeam 400 can be enhanced by the second reinforcing member 420.

[0119] In the above embodiments, optionally, the end of the upper longitudinal beam 300 near the second upper crossbeam 200 is in a higher vertical position than the first upper crossbeam 100.

[0120] At this point, it is convenient to arrange the lower crossbeam 400 and other components below the second upper crossbeam 200, so as to avoid the lower crossbeam 400 being too low in the vertical position after being arranged, which would affect the performance of the subframe.

[0121] Optionally, in the above embodiments, the subframe is further provided with a connection interface 820 for connecting with the wheel suspension.

[0122] The specific settings for the 820 connection interface are not restricted; they can be configured as needed.

[0123] like Figure 1 and Figure 10As shown, exemplarily, when the subframe is a rear subframe and the first upper crossbeam 100 is a front crossbeam, the connection interface 820 may include a first interface 821, a second interface 822, a third interface 823, a fourth interface 824, and a fifth interface 825. The first interface 821, the second interface 822, the third interface 823, the fourth interface 824, and the fifth interface 825 are respectively used to connect with the lower spring arm 920, the first control arm 930, the second control arm 940, the toe bar 950, and the steering knuckle arm connecting rod 960 of the wheel suspension.

[0124] Optionally, the first interface 821 is disposed between the second reinforcing member 420 and the inclined beam section 412. The fourth interface 824 is disposed at the first connecting plate portion 521. The fifth interface 825, the third interface 823, and the second interface 822 are all disposed on the upper longitudinal beam 300 and are distributed sequentially along the direction close to the second upper transverse beam 200, wherein the fifth interface 825 is disposed corresponding to the transition connecting section 320.

[0125] It should be understood that the subframe of the present invention can be used in pure electric vehicles, as well as hybrid vehicles and fuel vehicles.

[0126] Secondly, the vehicle provided by the present invention includes the subframe described in the above embodiments.

[0127] The vehicle has the beneficial effects of the subframe, which will not be elaborated here.

[0128] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A subframe, characterized in that, It includes a first upper crossbeam (100), a second upper crossbeam (200), an upper longitudinal beam (300), a lower crossbeam (400), a lower longitudinal beam (500), and a first suspension structure (600); The two upper longitudinal beams (300) are arranged laterally opposite each other and arched upwards. One end of each upper longitudinal beam (300) is connected to the first upper crossbeam (100) along the longitudinal direction, and the other end of each upper longitudinal beam (300) is connected to the second upper crossbeam (200) along the longitudinal direction. The first upper crossbeam (100), the second upper crossbeam (200), and the two upper longitudinal beams (300) constitute the upper shelf; the lower crossbeam (400) and The lower longitudinal beams (500) are respectively disposed below the second upper crossbeam (200) and the upper longitudinal beam (300). The two lower longitudinal beams (500) are respectively connected to the lower crossbeam (400). The lower crossbeam (400) and the two lower longitudinal beams (500) constitute the lower shelf. The lower shelf is connected to the upper shelf at both ends of the first upper crossbeam (100) and to the upper shelf at both ends of the lower crossbeam (400). The first suspension structure (600) is connected to the upper shelf and the lower shelf respectively; the first suspension structure (600) includes a first suspension sleeve (610) and a first sleeve seat (620), the first sleeve seat (620) is at least partially located between the upper shelf and the lower shelf, and is connected to the upper shelf and the lower shelf respectively, the first suspension sleeve (610) passes through the first sleeve seat (620) and is connected to the first sleeve seat (620); The first set of tube base (620) includes multiple plates, and at least one of the upper frame and the lower frame together with the multiple plates to form a box structure; The first suspension structure (600) further includes a first reinforcing member (630), which is connected to the upper frame, the lower frame and the first sleeve seat (620) respectively; When the first sleeve seat (620) is disposed near the connection between the upper longitudinal beam (300) and the second upper cross beam (200) and the subframe is used to connect with the vehicle's lateral stabilizer bar (910), the first reinforcement (630) is located on the side of the first sleeve seat (620) away from the first upper cross beam (100) along the longitudinal direction, and the first reinforcement (630) is connected to the lateral stabilizer bar (910).

2. The subframe as described in claim 1, characterized in that, The first sleeve seat (620) is located between the upper longitudinal beam (300) and the lower longitudinal beam (500), and the first suspension sleeve (610) extends axially along the transverse direction.

3. The subframe as described in claim 1, characterized in that, The first upper crossbeam (100) includes multiple crossbeam plates, which are connected to form a first cavity structure. The first cavity structure is connected to the upper longitudinal beam (300) and the lower longitudinal beam (500) at any end along the transverse direction. And / or, the subframe further includes a second suspension structure (700) mounted on the first upper crossbeam (100); when the first upper crossbeam (100) includes a plurality of the crossbeam plates and the subframe further includes the second suspension structure (700), the second suspension structure (700) passes through the crossbeam plates along the longitudinal direction.

4. The subframe as described in claim 3, characterized in that, Along the transverse direction, the first cavity structure includes a middle section (100a) and set sections (100b) located at both ends of the middle section (100a); along the longitudinal direction near the second upper crossbeam (200), the first cavity structure includes a first side plate (112) and a second side plate (122) arranged sequentially; within the set section (100b), along the direction away from the middle section (100a), the distance between the first side plate (112) and the second side plate (122) gradually increases; And / or, the first cavity structure is provided with a setting plate (113) at at least one end along the transverse direction, the setting plate (113) is connected to the upper longitudinal beam (300) and the first cavity structure respectively, and the setting plate (113) extends along the extension direction of the upper longitudinal beam (300) towards the side close to the second upper transverse beam (200).

5. The subframe as described in claim 4, characterized in that, The plurality of beam plates include a first beam plate (110) and a second beam plate (120). The first beam plate (110) includes an integrally formed first top plate (111) and a first side plate (112). The second beam plate (120) includes an integrally formed first bottom plate (121) and a second side plate (122). The first top plate (111) is located above the first bottom plate (121). The first top plate (111) is connected to the upper end of the second side plate (122). The first side plate (112) is connected to the end of the first bottom plate (121) away from the second upper beam (200). At least one of the upper longitudinal beam (300) and the lower longitudinal beam (500) is connected to the first crossbeam plate (110), and the upper longitudinal beam (300) and the lower longitudinal beam (500) are respectively connected to the second crossbeam plate (120); When the first cavity structure includes the set section (100b), within the set section (100b), along the direction away from the middle section (100a), the distance from a point on the first side plate (112) to the second upper crossbeam (200) gradually increases; When the first cavity structure is provided with the setting plate (113), the setting plate (113) is integrally formed on the first crossbeam plate (110).

6. The subframe as described in any one of claims 1 to 5, characterized in that, The lower longitudinal beam (500) includes a first main board (510), which is disposed facing the upper longitudinal beam (300). The two ends of the first main board (510) are respectively connected to the first upper crossbeam (100) and the lower crossbeam (400). A first reinforcing structure (520) is disposed on the first main board (510), and the first reinforcing structure (520) is connected to the upper longitudinal beam (300) near the first upper crossbeam (100).

7. The subframe as described in claim 6, characterized in that, One end of the first main board (510) extends below the first upper crossbeam (100) and is connected to the first upper crossbeam (100); the first reinforcing structure (520) includes a first reinforcing edge, the first reinforcing edge being located at the outer end of the first main board (510) along the lateral direction, the first reinforcing edge including a first connecting plate portion (521) disposed near the first upper crossbeam (100), the first connecting plate portion (521) being located on the outer side of the first upper crossbeam (100) along the lateral direction, the first connecting plate portion (521) being connected to the upper longitudinal beam (300); And / or, the first motherboard (510) is further provided with a second reinforcing structure (530), the second reinforcing structure (530) including a second reinforcing edge located at the inner end of the first motherboard (510) along the transverse direction, the second reinforcing edge being located on the side of the first motherboard (510) away from the upper longitudinal beam (300).

8. The subframe as described in any one of claims 1 to 5, characterized in that, The upper longitudinal beam (300) is formed by bending tubing; the upper longitudinal beam (300) includes a main arch section (310), a transition connection section (320) and a transverse extension section (330) arranged in sequence. The transverse extension section (330) is located at the end of the upper longitudinal beam (300) away from the second upper crossbeam (200). The transverse extension section (330) and the main arch section (310) are connected by the transition connection section (320). The first upper crossbeam (100) is connected to the main arch section (310), the transition connection section (320) and the transverse extension section (330) respectively. The end of the transverse extension section (330) away from the main arch section (310) is provided with a vehicle body connection point (810). And / or, the second upper crossbeam (200) is made of tubing, and both ends of the second upper crossbeam (200) extend beyond the upper longitudinal beam (300) and are provided with vehicle body connection points (810) at the ends. And / or, the lower crossbeam (400) includes a lower crossbeam body (410), the lower crossbeam body (410) having a C-shaped cross-section, the opening of the C-shaped structure being disposed along the longitudinal direction toward the first upper crossbeam (100); And / or, the end of the upper longitudinal beam (300) near the second upper transverse beam (200) is in a vertical position higher than the first upper transverse beam (100) in the vertical position; And / or, the subframe is also provided with a connection interface (820) for connecting to the vehicle's wheel suspension.

9. A vehicle, characterized in that, Includes the subframe as described in any one of claims 1 to 8.

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