Vehicle body suspension mounting structure and vehicle

Abstract

The present application discloses a vehicle body suspension mounting structure and a vehicle, relating to the field of vehicle suspension technology, wherein the mounting structure comprises: a side longitudinal beam, wherein an inner cavity is provided on the side longitudinal beam, wherein the inner cavity comprises a first side panel, a second side panel and a third side panel which are connected in sequence and arranged at an angle; a support member which is fitted with the outer side of the third side panel; a mounting member which is arranged in the inner cavity of the side longitudinal beam, wherein the mounting member comprises a first mounting plate and a second mounting plate which are connected and arranged at an angle, wherein the first mounting plate is arranged on the opening side of the inner cavity of the side longitudinal beam, and the second mounting plate, the third side panel and the support member are fitted in sequence to form the mounting surface of the vehicle body suspension; a nut box assembly which is located in the inner cavity of the side longitudinal beam and is connected to the side longitudinal beam and / or the mounting member, and wherein the vehicle body suspension is connected to the nut box assembly through the mounting surface.

Description

Technical Field

[0001] The present application belongs to the technical field of automobile suspension, and in particular relates to a vehicle body suspension mounting structure and an automobile. Background Art

[0002] The body suspension is a bidirectional vibration isolation element that connects the body and the frame and has a restraining and protective effect on movement trends. Its main function is to connect the frame and the body, withstand dynamic and static forces, and isolate the vibration of the frame or body caused by excitation, etc.

[0003] The body and frame of a non-load-bearing vehicle are typically supported and connected by a suspension. This requires the design of supporting structures at appropriate locations on the vehicle body to connect the suspension to the body. Because the suspension is subject to significant impact loads, the structural strength of the suspension mounting on the vehicle body must be relatively high. In existing technologies, suspension mounting structures typically achieve this structural strength by increasing the thickness of components and improving the material grade of the components. However, this approach increases vehicle weight and cost, failing to meet the demands for lightweighting and cost reduction. Summary of the Invention

[0004] The present application provides a vehicle body suspension mounting structure and a vehicle, aiming to at least to some extent solve the technical problems in the prior art of high cost of suspension mounting structures and failure to meet the requirements of vehicle body lightweighting.

[0005] To solve the above technical problems, this application adopts the following technical solutions:

[0006] A first aspect of an embodiment of the present application provides a vehicle body suspension mounting structure, the mounting structure comprising: a side longitudinal beam, an inner cavity being provided on the side longitudinal beam, the inner cavity comprising a first side panel, a second side panel and a third side panel being connected in sequence and arranged at an angle; a support member being fitted with the outer side of the third side panel; a mounting member being arranged in the inner cavity of the side longitudinal beam, the mounting member comprising a first mounting plate and a second mounting plate being connected and arranged at an angle, the first mounting plate being arranged on the opening side of the inner cavity of the side longitudinal beam, the second mounting plate, the third side panel and the support member being fitted in sequence to form the mounting surface of the vehicle body suspension; a nut box assembly being located in the inner cavity of the side longitudinal beam and being connected to the side longitudinal beam and / or the mounting member, the vehicle body suspension being connected to the nut box assembly through the mounting surface.

[0007] In some embodiments, the nut box assembly includes: a fixing member connected to the side longitudinal beam and / or the mounting member; and a nut box body fixed on the fixing member.

[0008] In some embodiments, the fixing member is groove-shaped, the nut box body is fixed to the groove bottom of the fixing member, the groove wall of the fixing member located on the opening side of the inner cavity of the side longitudinal beam is connected to the side longitudinal beam and the mounting member, and the groove edge on the other side of the fixing member is connected to the side longitudinal beam.

[0009] In some embodiments, a movable connecting nut is provided in the nut box body, and the vehicle body suspension is connected to the connecting nut.

[0010] In some embodiments, the nut box assembly and the second mounting plate are spaced apart, and a sleeve is provided between the nut box assembly and the mounting plate.

[0011] In some embodiments, a filling piece is provided between the nut box assembly and the second mounting plate. The filling piece is arranged around the periphery of the sleeve and is fixedly connected to the sleeve and / or the mounting piece.

[0012] In some embodiments, the outer contour of the filling piece is adapted to the mounting piece; the filling piece abuts against the nut box, the second mounting plate, and the first mounting plate.

[0013] In some embodiments, the filling piece includes two filling plates, each of which is provided with an arc-shaped groove matching the outer contour of the sleeve.

[0014] In some embodiments, the support member includes: a first bonding plate, bonded to the third side plate; a second bonding plate, arranged at an angle to one end of the first bonding plate, and a bonding surface of the second bonding plate is bonded to the second side plate.

[0015] In some embodiments, extension plates are provided on both sides of the inner cavity of the side longitudinal beam, and the side longitudinal beam is connected to the side door ring of the vehicle through the extension plates.

[0016] In some embodiments, a buffer cavity is formed between the side longitudinal beam, the mounting member, the nut box assembly and the side door ring of the vehicle.

[0017] A second aspect of an embodiment of the present application provides an automobile, wherein the automobile body suspension is fixed by the mounting structure.

[0018] It can be seen from the above technical solution that this application has at least the following advantages and positive effects:

[0019] A vehicle body suspension mounting structure in the present application, by arranging the nut box assembly in the cavity enclosed by the side longitudinal beam and the mounting member, and by sequentially fitting the second mounting plate, the third side plate and the support member to form the mounting surface of the vehicle body suspension, can avoid deformation of the cavity when the bolts are tightened, and at the same time improve the rigidity of the mounting point; the complex cavity structure formed by multi-layer sheet metal welding can effectively disperse the impact load, improve the fatigue durability of the mounting point structure, extend the service life, and while ensuring the dynamic stiffness and structural strength of the suspension mounting point, reduce the overall weight of the vehicle body and reduce manufacturing costs.

[0020] An automobile in the present application arranges a nut box assembly in a cavity enclosed by a side longitudinal beam and a mounting member, and forms the mounting surface of the vehicle body suspension by sequentially fitting a second mounting plate, a third side plate and a support member, thereby avoiding deformation of the cavity when the bolts are tightened and improving the rigidity of the mounting point; the complex cavity structure formed by multi-layer sheet metal welding can effectively disperse the impact load, improve the fatigue durability of the mounting point structure, extend the service life, and reduce the overall weight of the vehicle body while ensuring the dynamic stiffness and structural strength of the suspension mounting point, thereby reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 This is a cross-sectional view of a vehicle body suspension mounting structure according to an embodiment of the present application;

[0023] Figure 2 This is a schematic exploded view of a vehicle body suspension mounting structure according to an embodiment of the present application;

[0024] Figure 3 This is one of the partial structural cross-sectional views of a vehicle body suspension mounting structure according to an embodiment of the present application;

[0025] Figure 4 This is the second partial structural cross-sectional view of a vehicle body suspension mounting structure according to an embodiment of the present application;

[0026] Figure 5 It is a structural schematic diagram of the nut box main body in the embodiment of the present application.

[0027] The reference numerals in the accompanying drawings are as follows: 100, side longitudinal beam; 110, first side panel; 120, second side panel; 130, third side panel; 140, extension panel; 200, support member; 210, first bonding panel; 220, second bonding panel; 230, first curved panel; 240, second curved panel; 300, mounting member; 310, first mounting plate; 320, second mounting plate; 330, third mounting plate; 400, nut box assembly; 410, nut box body; 411, slide groove; 412, connecting nut; 413, limit plate; 420, fixing member; 430, sleeve; 440, filling panel; 510, suspension body; 520, fixing bolt; 600, side door knocker. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0029] Figure 1 This is a cross-sectional view of a vehicle body suspension mounting structure according to an embodiment of the present application; Figure 2 FIG. 1 is a schematic diagram of an exploded structure of a vehicle body suspension mounting structure according to an embodiment of the present application. Figure 1 and Figure 2As shown, the mounting structure in this embodiment is suitable for the suspension installation of the body of a non-load-bearing automobile, and the mounting structure includes: a side longitudinal beam 100, wherein the side longitudinal beam 100 is provided with an inner cavity, wherein the inner cavity includes a first side panel 110, a second side panel 120 and a third side panel 130 which are sequentially connected and arranged at an angle; a support member 200, which is in contact with the outer side of the third side panel 130; a mounting member 300, which is provided in the inner cavity of the side longitudinal beam 100, wherein the mounting member 300 includes a first side panel 110, a second side panel 120 and a third side panel 130 which are sequentially connected and arranged at an angle; A first mounting plate 310 and a second mounting plate 320 are set at an angle, the first mounting plate 310 is set on the opening side of the inner cavity of the side longitudinal beam 100, the second mounting plate 320, the third side plate 130 and the support member 200 are sequentially fitted to form the mounting surface of the vehicle body suspension; the nut box assembly 400 is located in the inner cavity of the side longitudinal beam 100 and is connected to the side longitudinal beam 100 and / or the mounting member 300, and the vehicle body suspension is connected to the nut box assembly 400 through the mounting surface. By setting the nut box assembly 400 in the cavity enclosed by the side longitudinal beam 100 and the mounting member 300, and forming the mounting surface of the vehicle body suspension by sequentially fitting the second mounting plate 320, the third side plate 130 and the support member 200, deformation of the cavity when the bolts are tightened can be avoided, and the rigidity of the mounting point can be improved at the same time; the complex cavity structure formed by multi-layer sheet metal welding can effectively disperse the impact load, improve the fatigue durability of the mounting point structure, extend the service life, and while ensuring the dynamic stiffness and structural strength of the suspension mounting point, reduce the overall weight of the vehicle body and reduce manufacturing costs.

[0030] In some embodiments, the vehicle body suspension includes a suspension body 510 and a fixing bolt 520 , and the fixing bolt 520 passes through the suspension body 510 and the mounting surface in sequence to be connected to the nut box assembly 400 .

[0031] See also Figure 2 and Figure 3 , Figure 3 This is one of the partial structural cross-sectional views of a vehicle body suspension mounting structure in an embodiment of the present application.

[0032] In some embodiments, the angle between the first side panel 110 and the second side panel 120 is between 90° and 130°, and the angle between the second side panel 120 and the third side panel 130 is between 90° and 130°. Arc transitions are provided at the connections between the second side panel 120 and the first and third side panels 110 and 130. Providing arc transitions at corners reduces stress concentration, improves workpiece strength, and can significantly reduce stress concentration in plastic parts. This is because the arc shape allows for smooth corner transitions, avoiding stress concentration issues that may be caused by sharp or right angles. This design not only improves the strength of the workpiece but also enhances its aesthetics.

[0033] See also Figure 1 and Figure 3 .

[0034] In some embodiments, the mounting member 300 further includes a third mounting plate 330 that is angled relative to the second mounting plate 320. The third mounting plate 330 is aligned with the inner side of the second side panel 120. The angle between the first mounting plate 310 and the second mounting plate 320 is between 90° and 130°, and the angle between the second mounting plate 320 and the third mounting plate 330 is between 90° and 130°. A circular arc transition is provided at the connection between the second mounting plate 320 and the first mounting plate 310 and the third mounting plate 330. By providing a circular arc transition at the corner, stress concentration is reduced, the strength of the workpiece is improved, and the stress concentration phenomenon of the plastic part can be significantly reduced. This is because the circular arc shape can smoothly transition the corners, avoiding the stress concentration problem that may be caused by sharp corners or right angles. This design not only improves the strength of the workpiece, but also makes the workpiece more beautiful. By providing the third mounting plate 330, the structural strength of the inner side of the second side panel 120 is improved. The mounting member 300 is used to improve the overall structural strength of the inner side of the inner cavity of the side longitudinal beam 100.

[0035] See also Figure 1 and Figure 3 .

[0036] In some embodiments, the support member 200 includes: a first bonding plate 210, which is bonded to the third side panel 130; a second bonding plate 220, which is set at an angle to one end of the first bonding plate 210, and the bonding surface of the second bonding plate 220 is bonded to the second side panel 120; the first bonding plate 210 is used to strengthen the strength of the second mounting plate 320, and the second bonding plate 220 is used to strengthen the structural strength of the second side panel 120; the support member 200 is used to improve the overall structural strength of the outer side of the inner cavity of the side longitudinal beam 100.

[0037] See also Figure 3 and Figure 4 , Figure 4 This is the second partial structural cross-sectional view of a vehicle body suspension mounting structure in an embodiment of the present application.

[0038] In some embodiments, the nut box assembly 400 includes: a fixing member 420, which is welded to the side longitudinal beam 100 and the mounting member 300; a nut box body 410, which is fixed to the fixing member 420; the fixing member 420 is groove-shaped, and the nut box body 410 is fixed to the groove bottom of the fixing member 420, and the groove wall of the fixing member 420 located on the side of the inner cavity opening of the side longitudinal beam 100 is welded to the side longitudinal beam 100 and the mounting member 300, and the groove edge on the other side of the fixing member 420 is welded to the second side plate 120 of the side longitudinal beam 100. Specifically, the outer side of the groove wall located on the side of the inner cavity opening of the side longitudinal beam 100 is fitted with the inner side of the first mounting plate 310, and the groove wall extends to the outside of the inner cavity to close the entire inner cavity to form a closed cavity. In other embodiments, the fixing member 420 can also be welded to the first mounting plate 310 or the second side plate 120 separately to complete the fixation. In this embodiment, simultaneous welding can improve the overall structural stability of the closed cavity.

[0039] In some embodiments, the side longitudinal beams 100, support members 200, mounting members 300 and fixing members 420 are all made of sheet metal materials. Sheet metal materials have a low density, which enables them to significantly reduce the overall weight of the product during the manufacturing process. This is especially important for products that need to reduce weight to reduce energy consumption or improve portability; sheet metal materials have good mechanical strength and can withstand large external forces without being easily deformed or damaged, which makes them very suitable for manufacturing components that need to withstand a certain amount of pressure or impact; the manufacturing cost of sheet metal materials is relatively low, and they are suitable for large-scale production, which is very beneficial for reducing costs and improving production efficiency; due to the strong plasticity of sheet metal materials, they are suitable for large-scale production and can meet the needs of mass production; the complex cavity structure formed by multi-layer sheet metal welding in this application has low manufacturing cost and light weight, which can reduce the overall weight of the vehicle body while ensuring the strength of the vehicle body and reduce manufacturing costs.

[0040] See also Figure 3 and Figure 4 .

[0041] In some embodiments, a movable connecting nut 412 is disposed within the nut box body 410, and the vehicle body suspension is connected to the connecting nut 412. The nut position can be adaptively adjusted frontward, rearward, leftward, and rightward, effectively absorbing the accumulated tolerances caused by the welding and assembly of the vehicle body and frame.

[0042] See also Figure 5 , Figure 5 4 is a structural diagram of the nut box body 410 in an embodiment of the present application;

[0043] In some embodiments, the nut box body 410 includes a slide groove 411, a connecting nut 412 and a limit plate 413. A through hole is provided at the bottom of the slide groove 411. The upper limit plate 413 is fixed to the upper end of the slide groove 411. A limit hole is provided on the upper limit plate 413; the connecting nut 412 includes a slider portion and a nut portion. The nut portion is fixed to the upper end of the slider portion. The slider portion is slidably connected to the slide groove 411. The nut portion passes through the limit hole. The fixing bolt 520 passes through the through hole at the bottom of the slide groove 411 and is connected to the connecting nut 412. The limit block is used to limit the range of motion of the connecting nut 412.

[0044] See also Figure 3 and Figure 4 .

[0045] In some embodiments, the nut box assembly 400 is spaced apart from the second mounting plate 320, and a sleeve 430 is provided between the nut box assembly 400 and the mounting plate; specifically, the bottom of the fixing member 420 is directly combined with the second side plate 120 and the mounting member 300 to form a sleeve mounting cavity, and the sleeve 430 is provided in the mounting cavity; the fixing bolt 520 passes through the mounting surface, the sleeve, the fixing member 420 and is connected to the connecting nut 412 in the nut box body 410. The use of the sleeve increases the thickness of the originally threaded sheet metal from four layers of plate to the cavity height plus the thickness of four layers of sheet metal, which greatly improves the dynamic stiffness and structural strength of the suspension mounting point; by providing the sleeve 430, the stability of the vehicle body suspension connection can be increased.

[0046] In some embodiments, a filler is provided between the nut box assembly 400 and the second mounting plate 320. The filler is disposed around the outer periphery of the sleeve 430 and is fixedly connected to the sleeve 430 and the mounting member 300. By providing the filler, deformation of the mounting cavity is avoided when the fixing bolt 520 is tightened, while the rigidity of the mounting surface is improved. In other embodiments, the filler can also be connected to the sleeve 430 alone or fixedly connected to the inner groove of the mounting member 300 alone. In this embodiment, fixing the filler to both the sleeve 430 and the mounting member 300 can improve the overall stability of the structure.

[0047] In some embodiments, the outer contour of the filling piece is adapted to the mounting piece 300; the filling piece abuts against the nut box, the second mounting plate 320, and the first mounting plate 310, which can ensure the filling effect, avoid deformation of the cavity, and improve the overall stability of the mounting structure.

[0048] In some embodiments, the filling piece is composed of two filling plates 440, and the filling plates 440 are provided with arc grooves that match the outer contour of the sleeve 430. The arc grooves of the two filling plates 440 are arranged around the outer contour of the sleeve 430, which can ensure the precision of fitting with the sleeve 430.

[0049] In some embodiments, the sleeve 430 is provided with a connecting flange at its bottom, through which it is secured to the mounting surface. A circular arc transition is provided at the connection between the sleeve 430 and the connecting flange to reduce stress concentration and improve overall strength. Using this circular arc transition at corners can significantly reduce stress concentration in the workpiece. This is because the circular arc shape allows for smooth transitions at corners, avoiding stress concentration issues that might otherwise be caused by sharp or right angles. This design not only improves the strength of the plastic part but also enhances its aesthetics.

[0050] In some embodiments, the diameter of the connecting flange is greater than or equal to the diameter of the mounting surface of the suspension body 510. This configuration effectively ensures the size of the mounting surface. When the suspension body 510 is subjected to an impact load from the chassis, the impact can be effectively transferred to the sleeve and the upper sheet metal, dispersing the load and improving the durability of the mounting point structure.

[0051] See also Figure 1 .

[0052] In some embodiments, extension plates 140 are provided on both sides of the inner cavity of the side rail 100, and the side rail 100 is connected to the vehicle's side door ring 600 through the extension plates 140. The load-bearing force of the suspension body 510 is transferred to the rocker beam through the extension plates 140, thereby supporting the entire vehicle body.

[0053] See also Figure 2 .

[0054] In some embodiments, the support member 200 also includes a first curved plate 230 connected to the other end of the first bonding plate 210, the first curved plate 230 is bonded to the extension plate 140 close to the suspension side of the vehicle body, and the structural strength of the extension plate 140 is strengthened by the first curved plate 230; the first curved plate 240 is connected to the second bonding plate 220, and the mounting structure is connected to the vehicle body through the first curved plate 240.

[0055] In some embodiments, the side rails 100, mounting members 300, nut box assembly 400, and the vehicle's side door ring 600 form a buffer chamber. This buffer chamber effectively disperses and transmits pressure, thereby improving the overall structural strength. This not only achieves lightweighting but also ensures the strength of the vehicle body structure. Pressure or external forces acting on the structure are effectively dispersed and transmitted, thus avoiding localized overloads and enhancing overall compressive resistance and stability. When the suspension body 510 is subjected to an impact load, the buffer chamber can buffer the force, preventing damage to the vehicle body structure and further improving the structural strength of the suspension mounting point.

[0056] A second aspect of the embodiments of the present application provides an automobile, wherein the automobile body suspension is secured by the aforementioned mounting structure. By placing a nut box assembly 400 within the cavity enclosed by the side rail 100 and the mounting member 300, and sequentially affixing a second mounting plate 320, a third side plate 130, and a support member 200 to form the mounting surface of the body suspension, deformation of the cavity when the bolts are tightened can be avoided, while simultaneously increasing the rigidity of the mounting point. The complex cavity structure formed by multi-layer sheet metal welding effectively disperses impact loads, improves the fatigue durability of the mounting point structure, and extends its service life. While ensuring the dynamic rigidity and structural strength of the suspension mounting point, it also reduces the overall weight of the vehicle body and lowers manufacturing costs.

[0057] It can be seen from the above technical solution that this application has at least the following advantages and positive effects:

[0058] A vehicle body suspension mounting structure in the present application, by arranging the nut box assembly in the cavity enclosed by the side longitudinal beam and the mounting member, and by sequentially fitting the second mounting plate, the third side plate and the support member to form the mounting surface of the vehicle body suspension, can avoid deformation of the cavity when the bolts are tightened, and at the same time improve the rigidity of the mounting point; the complex cavity structure formed by multi-layer sheet metal welding can effectively disperse the impact load, improve the fatigue durability of the mounting point structure, extend the service life, and while ensuring the dynamic stiffness and structural strength of the suspension mounting point, reduce the overall weight of the vehicle body and reduce manufacturing costs.

[0059] An automobile in the present application arranges a nut box assembly in a cavity enclosed by a side longitudinal beam and a mounting member, and forms the mounting surface of the vehicle body suspension by sequentially fitting a second mounting plate, a third side plate and a support member, thereby avoiding deformation of the cavity when the bolts are tightened and improving the rigidity of the mounting point; the complex cavity structure formed by multi-layer sheet metal welding can effectively disperse the impact load, improve the fatigue durability of the mounting point structure, extend the service life, and reduce the overall weight of the vehicle body while ensuring the dynamic stiffness and structural strength of the suspension mounting point, thereby reducing the manufacturing cost.

[0060] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0063] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0064] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A vehicle body suspension mounting structure, characterized in that: The mounting structure includes: A side longitudinal beam, wherein the side longitudinal beam is provided with an inner cavity, wherein the inner cavity comprises a first side plate, a second side plate and a third side plate which are connected in sequence and arranged at an angle; a support member, fitted with the outer side of the third side panel; A mounting member is provided in the inner cavity of the side longitudinal beam, the mounting member comprising a first mounting plate and a second mounting plate connected and arranged at an angle, the first mounting plate being provided at the opening side of the inner cavity of the side longitudinal beam, the second mounting plate, the third side plate and the support member being sequentially attached to form a mounting surface of the vehicle body suspension; a nut box assembly located in the inner cavity of the side longitudinal beam and connected to the side longitudinal beam and / or the mounting member, wherein the vehicle body suspension passes through the mounting surface and is connected to the nut box assembly; The nut box assembly includes: a fixing member connected to the side longitudinal beam and / or the mounting member, the fixing member being in a groove shape; The nut box body is fixed on the fixing part, and the nut box body is fixed to the bottom of the groove of the fixing part. The groove wall of the fixing part is located on the opening side of the inner cavity of the side longitudinal beam and is connected to the side longitudinal beam and the mounting part, and the groove edge on the other side of the fixing part is connected to the side longitudinal beam.

2. The mounting structure according to claim 1, wherein: A movable connecting nut is provided in the nut box main body, and the vehicle body suspension is connected to the connecting nut.

3. The mounting structure according to any one of claims 1 to 2, characterized in that: The nut box assembly and the second mounting plate are spaced apart, and a sleeve is provided between the nut box assembly and the mounting plate; A filling piece is provided between the nut box assembly and the second mounting plate. The filling piece is arranged around the periphery of the sleeve and is fixedly connected to the sleeve and / or the mounting piece.

4. The mounting structure according to claim 3, wherein: The outer contour of the filling piece is adapted to the mounting piece; the filling piece abuts against the nut box, the second mounting plate, and the first mounting plate; The filling piece includes two filling plates, and the filling plates are provided with arc-shaped grooves matching the outer contour of the sleeve.

5. The mounting structure according to claim 3, wherein: A connecting flange is provided at the bottom of the sleeve, and the sleeve is fixed to the mounting surface through the connecting flange. A circular arc transition is provided at the connection between the sleeve and the connecting flange.

6. The mounting structure according to claim 1, wherein: The support member comprises: A first laminating plate, laminating with the third side plate; The second laminating plate is arranged at an angle to one end of the first laminating plate, and the laminating surface of the second laminating plate is in contact with the second side plate.

7. The mounting structure according to claim 1, wherein: Extension plates are provided on both sides of the inner cavity of the side longitudinal beam, and the side longitudinal beam is connected to the side door ring of the vehicle through the extension plates.

8. The mounting structure according to claim 7, wherein: The side longitudinal beam, the mounting member, the nut box assembly and the side door ring of the vehicle together form a buffer cavity.

9. An automobile, characterized in that: The vehicle body is fixedly suspended by the mounting structure according to any one of claims 1 to 8.

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