Frame mid-section module connection structure, frame assembly and vehicle

Abstract

The present invention belongs to the field of vehicle technology and discloses a frame mid-module connection structure, a frame assembly and a vehicle. The frame mid-module connection structure is connected to the frame through a frame connection plate and is connected to the frame mid-module through a mid-module connection plate, which can increase the connection structure strength between the frame and the frame mid-module and avoid stress concentration. By setting a first reinforcement member to simultaneously connect the first connection part and the second connection part, the structural strength between the first connection part and the second connection part can be enhanced. In addition, in the first reinforcement member, the thickness of the thickest part of the first fillet and the second fillet is greater than the thickness of the first extension plate and the second extension plate, so that the parts of the first fillet and the second fillet where the stress is greater and stress concentration is most likely to occur are thicker, so that the entire first reinforcement member is evenly stressed and the stiffness changes smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a vehicle frame mid-module connection structure, a vehicle frame assembly and a vehicle. Background Art

[0002] The battery boxes of commercial vehicles and other vehicles are usually integrated into the structure in the middle of the frame. However, stress concentration is prone to occur near the connection point between the battery box and the frame, resulting in insufficient structural strength at the connection point between the battery box and the frame.

[0003] In response to this, the prior art provides a torsion box with a longitudinal beam connecting plate connected to the longitudinal beam of the vehicle frame, and a battery connecting plate connected to the battery assembly, thereby enhancing the structural strength of the connection between the longitudinal beam of the vehicle frame and the battery assembly. Furthermore, the torsion box is integrally molded, employing an integrated molding process to form its components, significantly improving its integration and significantly reducing the number and variety of parts. However, this design suffers from uneven force distribution across the torsion box, resulting in relatively poor structural strength. Summary of the Invention

[0004] According to one aspect of the present invention, the present invention provides a mid-frame module connection structure to solve the problem in the prior art that the torsion box itself is subjected to uneven force at various positions and the structural strength is still poor.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A vehicle frame mid-module connection structure, used to simultaneously connect the vehicle frame and the vehicle frame mid-module, wherein the vehicle frame mid-module is fixedly connected to the middle of the vehicle frame;

[0007] The frame mid-module connection structure includes:

[0008] A frame connecting plate, used for fixed connection with the frame;

[0009] A middle module connecting plate connected to the frame connecting plate; the middle module connecting plate includes a first connecting portion and a second connecting portion connected in sequence, the first connecting portion and the second connecting portion are both used to be fixedly connected to the middle module of the frame, and the extension directions of the first connecting portion and the second connecting portion form an angle;

[0010] The first reinforcement includes a first extension plate, a first fillet, a first transition section, a second fillet and a second extension plate connected in sequence, the first extension plate is fixedly connected to the first connection part, the second extension plate is fixedly connected to the second connection part, the thickness of the first extension plate and the second extension plate are equal, the first fillet and the second fillet are both unequal thickness fillets, and the thickness of the thickest parts of the first fillet and the second fillet are both greater than the thickness of the first extension plate and the second extension plate.

[0011] As a preferred solution for the mid-frame module connection structure, the thickness of the first extension plate and the second extension plate are both t1, the thickness of the thickest part of the first fillet and the second fillet is t2, the thickness of the first transition section is t3, t2 / t1≥4 / 3, t1>t3.

[0012] As a preferred solution for the frame mid-module connection structure, the mid-module connection plate is U-shaped, and the mid-module connection plate also includes a third connection portion connected to the second connection portion, the third connection portion is used to be fixedly connected to the frame mid-module, the second extension plate of the first reinforcement is fixedly connected to the frame connection plate, and the frame mid-module connection structure also includes a second reinforcement, and the second reinforcement is fixedly connected to the frame connection plate and the third connection portion at the same time.

[0013] As a preferred solution of the vehicle frame mid-module connection structure, the thicknesses of the first connection portion, the second connection portion, the third connection portion, the first extension plate, the second extension plate, and the second reinforcement are all equal.

[0014] As a preferred solution of the mid-frame module connection structure, the mid-frame module connection structure also includes a fender mounting structure, which includes a first fender mounting plate fixedly connected to the first connection part and a second fender mounting plate fixedly connected to the third connection part. The first fender mounting plate and the second fender mounting plate are used to install a fender fixing bracket.

[0015] As a preferred solution of the mid-frame module connection structure, the mid-frame module connection structure also includes a cab mounting structure, which includes a supporting rib fixedly connected to the top of the second reinforcement and a cab mounting portion fixedly connected to the supporting rib, the cab mounting portion being annular and having a cab mounting hole for cooperating with the cab floor.

[0016] As a preferred solution for the frame mid-module connection structure, a plurality of support ribs are arranged at intervals, and the cab mounting part is fixedly connected to the plurality of support ribs at the same time. Among the plurality of support ribs, the thickness of the support ribs located at both ends is greater than the thickness of the support ribs located in the middle.

[0017] As a preferred solution for the mid-frame module connection structure, the third connecting portion has a first section and a second section, the second section is connected to the second connecting portion, and the width of the first section is smaller than the width of the second section. The mid-frame module connection structure also includes a third reinforcement, and the third reinforcement includes a third extension plate, a third fillet, a second transition section, a fourth fillet and a fourth extension plate connected in sequence. The third extension plate is fixedly connected to the first section, and the fourth extension plate is fixedly connected to the second section and the frame connection plate at the same time.

[0018] As a preferred solution for the frame mid-module connection structure, the thicknesses of the first connection portion, the second connection portion, the third connection portion, the first extension plate, the second extension plate, and the second reinforcement are all t1, the thicknesses of the third extension plate and the second transition section are the same, and are both t5, the thickness of the fourth extension plate is t6, t5 / t1≥4 / 3, t6>t5.

[0019] As a preferred solution of the frame mid-module connection structure, the frame mid-module connection structure also includes two leaf spring mounting structures arranged at intervals, the leaf spring mounting structure including a connecting section and a leaf spring mounting portion arranged on the connecting section, the leaf spring mounting portions of the two leaf spring mounting structures have leaf spring mounting holes for mounting leaf springs, the connecting section of one of the leaf spring mounting structures is fixedly connected to the frame connecting plate, and the connecting section of the other leaf spring mounting structure is fixedly connected to the third reinforcement.

[0020] As a preferred solution for the mid-frame module connection structure, the axial direction of the leaf spring mounting hole is parallel to the front-to-rear direction of the vehicle body, and along the left-right direction of the vehicle body, the thickness of the connecting section connected to the frame connecting plate is not greater than the thickness of the connecting section connected to the third reinforcement.

[0021] As a preferred solution of the vehicle frame mid-module connection structure, the vehicle frame mid-module connection structure is integrally cast.

[0022] According to another aspect of the present invention, a vehicle frame assembly is provided, comprising the above-mentioned mid-frame module connection structure, and also comprising a vehicle frame, wherein the mid-frame module is fixedly connected to the middle portion of the vehicle frame, and the mid-frame module connection structure simultaneously connects the vehicle frame and the mid-frame module.

[0023] As a preferred solution of the frame assembly, the frame includes two parallel and spaced longitudinal beams, the mid-frame module simultaneously passes through the two longitudinal beams, and four mid-frame module connecting structures are provided, two of which are connected to one longitudinal beam, and the two mid-frame module connecting structures are respectively located at the front and rear ends of the mid-frame module, and the other two mid-frame module connecting structures are connected to the other longitudinal beam, and the two mid-frame module connecting structures are respectively located at the front and rear ends of the mid-frame module.

[0024] According to yet another aspect of the present invention, a vehicle is provided, comprising the above-mentioned frame assembly and a mid-frame module, wherein the mid-frame module is fixedly connected to the middle portion of the frame.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a frame middle module connection structure for simultaneously connecting a frame and a frame middle module, the frame middle module being fixedly connected to the middle part of the frame; the frame middle module connection structure includes a frame connection plate, a middle module connection plate and a first reinforcement member, the frame connection plate being used to be fixedly connected to the frame; the middle module connection plate is connected to the frame connection plate; the middle module connection plate includes a first connection portion and a second connection portion connected in sequence, the first connection portion and the second connection portion being both used to be fixedly connected to the frame middle module, the extension directions of the first connection portion and the second connection portion being at an angle, so that the frame middle module connection structure is connected to the frame through the frame connection plate and to the frame middle module through the middle module connection plate, so as to increase the connection structure strength between the frame and the frame middle module and avoid stress concentration. In addition, by connecting the frame middle module specifically through the first connection portion and the second connection portion arranged at an angle, the middle module connection plate can be connected to different positions of the frame middle module to enhance the stability of the connection between the frame middle module and the middle module connection plate. The first reinforcement member includes a first extension plate, a first fillet, a first transition section, a second fillet, and a second extension plate, which are connected in sequence. The first extension plate is fixedly connected to the first connecting portion, and the second extension plate is fixedly connected to the second connecting portion. The provision of the first reinforcement member enhances the structural strength between the first and second connecting portions. Furthermore, the first and second extension plates have equal thicknesses, while the first and second fillets are fillets of unequal thickness. The thickness of the thickest portions of the first and second fillets is greater than that of the first and second extension plates. This results in the first and second fillets being thicker in the first reinforcement member, where stress is greater and most likely to concentrate. This ensures uniform force distribution throughout the first reinforcement member and a smooth transition in stiffness.

[0027] The present invention also provides a vehicle frame assembly, including the above-mentioned vehicle frame mid-module connection structure, and also including a vehicle frame, wherein the mid-frame module is fixedly connected to the middle portion of the vehicle frame, and the mid-frame module connection structure simultaneously connects the vehicle frame and the mid-frame module. The mid-frame module connection structure connects the vehicle frame via a frame connection plate, and connects the mid-frame module via a mid-module connection plate, thereby increasing the strength of the connection structure between the vehicle frame and the mid-frame module, avoiding stress concentration, and enhancing the structural strength between the first connection portion and the second connection portion by providing a first reinforcement member. In addition, in the first reinforcement member, the first fillet and the second fillet, where stress is greater and most likely to cause stress concentration, are thicker, so that the entire first reinforcement member is evenly stressed and the stiffness changes smoothly, thereby evenly stressing each joint point of the vehicle frame assembly, and having stiffness and strength superior to traditional longitudinal beam structures.

[0028] The present invention also provides a vehicle comprising the above-mentioned frame assembly and a mid-frame module fixedly connected to the middle portion of the frame. The frame assembly has uniform force applied to each joint point, and has superior rigidity and strength to conventional longitudinal beam structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 2 is a schematic structural diagram of a vehicle frame middle module connection structure according to an embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional view of the frame mid-module connection structure according to an embodiment of the present invention. Figure 1 ;

[0031] Figure 3 This is a cross-sectional view of the frame mid-module connection structure according to an embodiment of the present invention. Figure 2 ;

[0032] Figure 4 This is a schematic diagram of the structure of the frame assembly in an embodiment of the present invention. Figure 1 ;

[0033] Figure 5 This is a schematic diagram of the structure of the frame assembly in an embodiment of the present invention. Figure 2 .

[0034] In the picture:

[0035] 100, frame; 101, first mounting surface; 110, longitudinal beam; 120, cross beam;

[0036] 200, mid-frame module; 201, second mounting surface;

[0037] 1. Frame connecting plate;

[0038] 2. Middle module connecting plate; 21. First connecting portion; 22. Second connecting portion; 23. Third connecting portion;

[0039] 3. First reinforcement; 31. First extension plate; 32. First fillet; 33. First transition section; 34. Second fillet; 35. Second extension plate;

[0040] 4. Second reinforcement;

[0041] 5. Third reinforcement; 51. Third extension plate; 52. Third fillet; 53. Second transition section; 54. Fourth fillet; 55. Fourth extension plate; 56. Fifth extension plate; 57. Sixth extension plate;

[0042] 6. Fender mounting structure; 61. First fender mounting plate; 62. Second fender mounting plate;

[0043] 7. Cab mounting structure; 71. Support ribs; 72. Cab mounting portion; 721. Cab mounting hole;

[0044] 8. Leaf spring mounting structure; 81. Connecting section; 82. Leaf spring mounting portion; 821. Leaf spring mounting hole. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0046] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0047] In the present invention, 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. Furthermore, 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.

[0048] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0049] The battery box of commercial vehicles and other vehicles is usually integrated into the structure in the middle of the frame, and stress concentration is prone to occur near the connection point between the battery box and the frame, resulting in insufficient structural strength at the connection point between the battery box and the frame. In response to this, the prior art provides a torsion box, whose longitudinal beam connecting plate is connected to the longitudinal beam of the frame, and the battery connecting plate is connected to the battery assembly to enhance the structural strength of the connection between the longitudinal beam of the frame and the battery assembly. In addition, the torsion box is an integrally molded setting, and the various components of the torsion box are formed using an integral molding process, which greatly improves the degree of integration of the torsion box and can significantly reduce the number and types of parts. However, the problem is that the force applied to each position of the torsion box itself is uneven, and its structural strength is still poor.

[0050] To address the above issues, this embodiment provides a mid-frame module connection structure to solve the problem in the prior art that the torsion box itself is subjected to uneven force at various positions and the structural strength is still poor. The structure can be used in the field of vehicle technology, specifically in commercial vehicles.

[0051] Reference Figure 1-Figure 5 The frame middle module connection structure is used to simultaneously connect the frame 100 and the frame middle module 200. The frame middle module 200 is fixedly connected to the middle of the frame 100. The frame middle module connection structure includes a frame connecting plate 1 and a middle module connecting plate 2. The frame connecting plate 1 is used to be fixedly connected to the frame 100. The middle module connecting plate 2 is connected to the frame connecting plate 1. The middle module connecting plate 2 includes a first connecting portion 21 and a second connecting portion 22 that are connected in sequence. The first connecting portion 21 and the second connecting portion 22 are both used to be fixedly connected to the frame middle module 200. The first connecting portion 21 and the second connecting portion 22 are connected in sequence. The extension direction of the connecting portion 22 is at an angle, so that the frame mid-module connection structure is connected to the frame 100 through the frame connecting plate 1 and is connected to the frame mid-module 200 through the mid-module connecting plate 2, so as to increase the strength of the connection structure between the frame 100 and the frame mid-module 200 and avoid stress concentration. In addition, by connecting the frame mid-module 200 specifically through the first connecting portion 21 and the second connecting portion 22 set at an angle, the mid-module connecting plate 2 can be connected to different positions of the frame mid-module 200, so as to enhance the stability of the connection between the frame mid-module 200 and the mid-module connecting plate 2.

[0052] In this embodiment, the vehicle frame 100 includes two parallel, spaced longitudinal beams 110, and a plurality of transverse beams 120 connecting the longitudinal beams 110 and disposed between the longitudinal beams 110. The frame connecting plate 1 is connected to the longitudinal beams 110, specifically to the first mounting surface 101 of the longitudinal beams 110. The mid-frame module 200 is a battery pack, to which the mid-module connecting plate 2 is connected. In other embodiments, the mid-frame module 200 may also be a radiator or other structure. The mid-module connecting plate 2 is connected to the second mounting surface 201 of the mid-frame module 200. Both the first mounting surface 101 and the second mounting surface 201 are perpendicular to a horizontal plane, with the first mounting surface 101 being perpendicular to the second mounting surface 201. Specifically, the first mounting surface 101 is parallel to the front-to-back direction of the vehicle body, while the second mounting surface 201 is parallel to the left-to-right direction of the vehicle body. Therefore, the frame connecting plate 1 connected to the first mounting surface 101 is perpendicular to the mid-module connecting plate 2 connected to the second mounting surface 201.

[0053] Continue to refer to Figure 1-Figure 5 The mid-frame module connection structure also includes a first reinforcement member 3, which comprises a first extension plate 31, a first fillet 32, a first transition section 33, a second fillet 34, and a second extension plate 35, which are connected in sequence. The first extension plate 31 is fixedly connected to the first connection portion 21, and the second extension plate 35 is fixedly connected to the second connection portion 22. The provision of the first reinforcement member 3 enhances the structural strength between the first connection portion 21 and the second connection portion 22. Furthermore, the first extension plate 31 and the second extension plate 35 have equal thicknesses, while the first fillet 32 ​​and the second fillet 34 are fillets of unequal thickness. The thickness of the thickest portions of the first fillet 32 ​​and the second fillet 34 is greater than that of the first extension plate 31 and the second extension plate 35. This results in a thicker portion of the first fillet 32 ​​and the second fillet 34, where stress is greater and most likely to concentrate, being thicker. This ensures uniform stress distribution throughout the first reinforcement member 3 and a smooth transition in stiffness.

[0054] Optionally, the second extension plate 35 is also fixedly connected to the frame connecting plate 1 to enhance the structural strength of the connection between the frame connecting plate 1 and the central module connecting plate 2. Furthermore, in this embodiment, the first connecting portion 21 and the second connecting portion 22 are located below the frame connecting plate 1. Since the frame connecting plate 1 and the central module connecting plate 2 are perpendicular, to accommodate this structure, the first extension plate 31 is parallel to the horizontal plane. That is, the first extension plate 31 is perpendicular to both the frame connecting plate 1 and the central module connecting plate 2, while the second extension plate 35 is arranged parallel to the frame connecting plate 1.

[0055] Continue to refer to Figure 1-Figure 5The thickness of the first extension plate 31 and the second extension plate 35 are both t1, the thickness of the thickest part of the first fillet 32 ​​and the second fillet 34 is t2, the thickness of the first transition section 33 is t3, t2 / t1≥4 / 3, so that the thickness of the thickest part of the first fillet 32 ​​and the second fillet 34 is larger than the thickness of the first extension plate 31 and the second extension plate 35, so that the first fillet 32 ​​and the second fillet 34 are thicker; in addition, t1>t3, so that the thickness of the first transition section 33 where the force is less is reduced to reduce the weight and further make the force of the first reinforcement 3 uniform. Optionally, t3 / t1≤13 / 15, so that the thickness of the first transition section 33 is smaller than the thickness of the first extension plate 31 and the second extension plate 35. In this embodiment, the thickness t1 of the first extension plate 31 and the second extension plate 35 is 15 mm, the thickness t2 of the thickest portion of the first fillet 32 ​​and the second fillet 34 is 20 mm, and the thickness t3 of the first transition section 33 is 13 mm. In other embodiments, the thickness t2 of the thickest portion of the first fillet 32 ​​and the second fillet 34 may be 21 mm, 22 mm, 23 mm, 24 mm, or 25 mm, and the thickness t3 of the first transition section 33 may be 12 mm, 11 mm, 10 mm, or 9 mm. Furthermore, the thickness t1 of the first extension plate 31 and the second extension plate 35 may be set to other values, such as 10 mm, 20 mm, or 25 mm, and the thickness t2 of the thickest portion of the first fillet 32 ​​and the second fillet 34 and the thickness t3 of the first transition section 33 may be set to other values ​​accordingly.

[0056] Continue to refer to Figure 1-Figure 5 The mid-module connecting plate 2 is U-shaped and further includes a third connecting portion 23 connected to the second connecting portion 22. The third connecting portion 23 is configured to be fixedly connected to the mid-frame module 200. The second extension plate 35 of the first reinforcement 3 is fixedly connected to the frame connecting plate 1, further enabling the mid-module connecting plate 2 to be connected to more locations on the mid-frame module 200. The mid-frame module connection structure further includes a second reinforcement 4, which is fixedly connected to both the frame connecting plate 1 and the third connecting portion 23 to further enhance the structural strength of the connection between the frame connecting plate 1 and the third connecting portion 23. In this embodiment, the third connecting portion 23 is located at the same height as the frame connecting plate 1. Since the frame connecting plate 1 is perpendicular to the middle module connecting plate 2, in order to adapt to this structure, the second reinforcement 4 is parallel to the horizontal plane, that is, it is perpendicular to the frame connecting plate 1 and the third connecting portion 23 at the same time. The second reinforcement 4 is L-shaped and has two mutually perpendicular mounting plates, one of which is fixedly connected to the frame connecting plate 1, and the other is fixedly connected to the third connecting portion 23.

[0057] Continue to refer to Figure 1-Figure 5The thicknesses of the first connecting portion 21, the second connecting portion 22, the third connecting portion 23, the first extension plate 31, the second extension plate 35 and the second reinforcement 4 are all equal. The above structures are all areas where the force is relatively balanced, so they can be set to the same thickness. In this embodiment, the thickness of the above structures is 15 mm. Optionally, the thickness of the thickest fillet between the first extension plate 31 and the first connection part 21, the thickness of the thickest fillet between the second extension plate 35 and the second connection part 22, the thickness of the thickest fillet between the third connection part 23 and the second reinforcement 4, and the thickness of the thickest fillet between the frame connecting plate 1 and the second reinforcement 4 are all the same, and their thicknesses are all t4, t4 / t1=4 / 3, that is, the value of t4 is specifically 20 mm, that is, the thickness of the positions where the first connection part 21, the second connection part 22 and the third connection part 23 are interconnected with the first extension plate 31, the second extension plate 35 and the second reinforcement 4, and the thickness of the position where the frame connecting plate 1 is interconnected with the second reinforcement 4 are the same, and the stress they are subjected to is greater than that of the first connection part 21, the second connection part 22, the third connection part 23, the first extension plate 31, the second extension plate 35 and the second reinforcement 4 itself, so their thickness is also greater.

[0058] Continue to refer to Figure 1-Figure 5 The mid-frame module connection structure also includes a fender mounting structure 6, which includes a first fender mounting plate 61 fixedly connected to the first connection portion 21 and a second fender mounting plate 62 fixedly connected to the third connection portion 23. The first fender mounting plate 61 and the second fender mounting plate 62 are used to install a fender fixing bracket, thereby integrating the fender mounting structure 6 into the mid-frame module connection structure, which can further improve the integration level of the frame assembly and reduce the number of parts.

[0059] Continue to refer to Figure 1-Figure 5 The mid-frame module connection structure also includes a cab mounting structure 7, which includes a support rib 71 fixedly connected to the upper side of the second reinforcement 4 and a cab mounting portion 72 fixedly connected to the support rib 71. The cab mounting portion 72 is annular and has a cab mounting hole 721 for cooperating with the cab floor, thereby integrating the cab mounting structure 7 into the mid-frame module connection structure, which can also further improve the degree of integration of the frame assembly and reduce the number of parts.

[0060] Optionally, multiple support ribs 71 are provided at intervals, and the cab mounting portion 72 is fixedly connected to multiple support ribs 71 at the same time. Among the multiple support ribs 71, the support ribs 71 located at the ends are subjected to greater force, while the support ribs 71 located in the middle are subjected to less force. Therefore, in order to adapt to the force conditions of the above structure, the thickness of the support ribs 71 located at the ends is greater than the thickness of the support ribs 71 located in the middle. Further optionally, the thickness of the support rib 71 located in the middle is the same as the thickness of the annular cab mounting portion 72. In this embodiment, the thickness of the support ribs 71 located at the ends is 14 mm, and the thickness of the support rib 71 located in the middle and the thickness of the annular cab mounting portion 72 are both 10 mm.

[0061] Continue to refer to Figure 1-Figure 5 The third connecting portion 23 has a first section and a second section, the second section is connected to the second connecting portion 22, and the width of the first section is smaller than the width of the second section. The frame mid-module connection structure also includes a third reinforcement 5, and the third reinforcement 5 includes a third extension plate 51, a third fillet 52, a second transition section 53, a fourth fillet 54 and a fourth extension plate 55 connected in sequence. The third extension plate 51 is fixedly connected to the first section, and the fourth extension plate 55 is fixedly connected to the second section and the frame connecting plate 1 at the same time, thereby improving the connection structure strength between the frame connecting plate 1, the first section and the second section of the third connecting portion 23.

[0062] Continue to refer to Figure 1-Figure 5The first connecting portion 21, the second connecting portion 22, the third connecting portion 23, the first extension plate 31, the second extension plate 35, and the second reinforcement 4 all have a thickness of t1. The third extension plate 51 and the second transition section 53 have the same thickness, t5. The fourth extension plate 55 has a thickness of t6. Generally speaking, the stress experienced by the third extension plate 51 and the second transition section 53 is greater than the stress experienced by the first connecting portion 21, the second connecting portion 22, the third connecting portion 23, the first extension plate 31, the second extension plate 35, and the second reinforcement 4. Furthermore, the fourth extension plate 55 also needs to be connected to the frame connecting plate 1, and therefore is subjected to a higher stress than the third extension plate 51 and the second transition section 53. Therefore, t5 / t1 ≥ 4 / 3, and t6 > t5. In this embodiment, the thickness of the third extension plate 51 and the second transition section 53 is 20 mm, and the thickness of the fourth extension plate 55 is 30 mm. In other embodiments, the thickness of the third extension plate 51 and the second transition section 53 can also be 21 mm, 22 mm, 23 mm, 24 mm or 25 mm, and the thickness of the fourth extension plate 55 can also be other values ​​greater than the thickness of the third extension plate 51 and the second transition section 53. For example, when the thickness of the third extension plate 51 and the second transition section 53 is 20 mm, the thickness of the fourth extension plate 55 can also be 22 mm, 24 mm, 26 mm, 28 mm or 32 mm, and when the thickness of the third extension plate 51 and the second transition section 53 is 25 mm, the thickness of the fourth extension plate 55 can also be 27 mm, 29 mm, 31 mm, 33 mm or 35 mm, and the like.

[0063] Optionally, the thickness of the thickest part of the fourth fillet 54 is 28 mm, and the thickness of the narrowest part is 16 mm, so that the thickness of the thickest part of the fourth fillet 54 is close to the thickness of the fourth extension plate 55 to ensure strength, and a smaller thickness is used at the position with less force to reduce weight and adapt to the force size at different positions of the fourth fillet 54.

[0064] Optionally, the thickness of the thickest part of the fillet between the fourth extension plate 55 and the third connecting part 23 is 30 mm, and the thickness of the narrowest part is 20 mm, so that the thickness of the thickest part of the fillet between the fourth extension plate 55 and the third connecting part 23 is equal to the thickness of the fourth extension plate 55 to ensure strength, and a smaller thickness is used at positions with less force to reduce weight and adapt to the force size at different positions of the fillet between the fourth extension plate 55 and the third connecting part 23.

[0065] Optionally, the third reinforcement 5 further includes a fifth extension plate 56 connected to the fourth extension plate 55. The fifth extension plate 56 is fixedly connected to the frame connecting plate 1, thereby connecting the third reinforcement 5 simultaneously to the third connecting portion 23 and the frame connecting plate 1, thereby enhancing the structural strength of the connection between the third connecting portion 23 and the frame connecting plate 1. In this embodiment, the extension direction of the fourth extension plate 55 forms an angle with the extension direction of the fifth extension plate 56. Since the frame connecting plate 1 is perpendicular to the middle module connecting plate 2, to accommodate this structure, the third extension plate 51, the fourth extension plate 55, and the fifth extension plate 56 are all parallel to the horizontal plane. That is, the third extension plate 51, the fourth extension plate 55, and the fifth extension plate 56 are perpendicular to both the frame connecting plate 1 and the middle module connecting plate 2. The second reinforcement 4, the third extension plate 51, the fourth extension plate 55, and the fifth extension plate 56 are mutually parallel. Furthermore, the fourth extension plate 55 extends parallel to the second mounting surface 201, and the fifth extension plate 56 extends parallel to the first mounting surface 101, i.e., their extension directions are perpendicular. The thickness of the fifth extension plate 56 is the same as that of the fourth extension plate 55 , and both are 30 mm in this embodiment.

[0066] Optionally, the third reinforcement 5 further includes a sixth extension plate 57, which extends vertically and simultaneously securely connects the fifth extension plate 56, the frame connecting plate 1, and the second reinforcement 4, thereby enhancing the structural strength of the connection between the fifth extension plate 56, the frame connecting plate 1, and the second reinforcement 4. In this embodiment, the thickness of the sixth extension plate 57 is the same as that of the third extension plate 51 and the second transition section 53, both being 20 mm in this embodiment. Furthermore, the portion of the sixth extension plate 57 near the fifth extension plate 56 experiences greater force, while the portion near the second reinforcement 4 experiences less force. Therefore, the width of the sixth extension plate 57 gradually decreases as it moves away from the fifth extension plate 56.

[0067] Continue to refer to Figure 1-Figure 5 The mid-frame module connection structure also includes two leaf spring mounting structures 8 arranged at intervals. The leaf spring mounting structure 8 includes a connecting section 81 and a leaf spring mounting portion 82 arranged on the connecting section 81. The leaf spring mounting portions 82 of the two leaf spring mounting structures 8 have leaf spring mounting holes 821 for mounting leaf springs. The connecting section 81 of one leaf spring mounting structure 8 is fixedly connected to the frame connecting plate 1, and the connecting section 81 of the other leaf spring mounting structure 8 is fixedly connected to the third reinforcement 5, specifically, fixedly connected to the fifth extension plate 56. This arrangement can integrate the leaf spring mounting structure 8 into the mid-frame module connection structure, which can also further improve the degree of integration of the frame assembly and reduce the number of parts.

[0068] Optionally, the axial direction of the leaf spring mounting hole 821 is parallel to the front-to-rear direction of the vehicle body. Along the left-right direction of the vehicle body, since the structural strength of the frame connecting plate 1 is higher than that of the third reinforcement 5, the thickness of the connecting section 81 connected to the frame connecting plate 1 is not greater than the thickness of the connecting section 81 connected to the third reinforcement 5, so as to adapt to the difference in structural strength between the frame connecting plate 1 and the third reinforcement 5. In this embodiment, the thickest part of the connecting section 81 connected to the frame connecting plate 1 is 43 mm, and the narrowest part is 36 mm, while the thickness of the connecting section 81 connected to the third reinforcement 5 is 43 mm.

[0069] Optionally, along the front-rear direction of the vehicle body, the length of the two connecting sections 81 at the longest position is 103 mm, and the length of the shortest position is 47 mm, while along the front-rear direction of the vehicle body, the length of the leaf spring mounting portion 82 is 53 mm.

[0070] Optionally, the module connection structure in the middle of the frame is integrally cast, thereby simplifying the processing process, reducing the number of parts, and facilitating assembly.

[0071] This embodiment also provides a vehicle frame assembly, comprising the aforementioned mid-frame module connection structure, and also comprising a vehicle frame 100, with a mid-frame module 200 fixedly connected to the middle portion of the vehicle frame 100. The mid-frame module connection structure simultaneously connects the vehicle frame 100 and the mid-frame module 200. The mid-frame module connection structure connects the vehicle frame 100 via a frame connection plate 1 and the mid-frame module 200 via a mid-module connection plate 2. This structure can increase the structural strength of the connection between the vehicle frame 100 and the mid-frame module 200, thereby avoiding stress concentration. Furthermore, the provision of a first reinforcement member 3 can enhance the structural strength between the first connecting portion 21 and the second connecting portion 22. Furthermore, the first fillet 32 ​​and the second fillet 34 of the first reinforcement member 3, where stress is greater and most likely to cause stress concentration, are thicker. This ensures uniform stress distribution across the entire first reinforcement member 3, resulting in a smooth transition in stiffness. This ensures uniform stress distribution across the joints of the vehicle frame assembly, resulting in superior stiffness and strength compared to conventional longitudinal beam structures.

[0072] Continue to refer to Figure 1-Figure 5The vehicle frame 100 includes two longitudinal beams 110 that are arranged in parallel and at intervals. The mid-frame module 200 passes through the two longitudinal beams 110 at the same time. Four mid-frame module connecting structures are provided, two of which are connected to one longitudinal beam 110, and the two mid-frame module connecting structures are respectively located at the front and rear ends of the mid-frame module 200. The other two mid-frame module connecting structures are connected to the other longitudinal beam 110, and the two mid-frame module connecting structures are respectively located at the front and rear ends of the mid-frame module 200, so that the four mid-frame module connecting structures are respectively connected to the left front, right front, left rear and right rear positions of the mid-frame module 200, so that the mid-frame module 200 is stably installed on the two longitudinal beams 110 of the frame 100 through the mid-frame module connecting structures.

[0073] This embodiment also provides a vehicle, comprising the above-mentioned frame assembly, and further comprising a mid-frame module 200, which is fixedly connected to the middle of the frame 100. Each joint of the frame assembly is uniformly stressed, and its rigidity and strength are superior to those of a traditional longitudinal beam structure.

[0074] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A vehicle frame mid-module connection structure, used for simultaneously connecting a vehicle frame (100) and a vehicle frame mid-module (200), wherein the vehicle frame mid-module (200) is fixedly connected to the middle of the vehicle frame (100); It is characterized in that The frame mid-module connection structure includes: A vehicle frame connecting plate (1), used for fixedly connecting to the vehicle frame (100); A middle module connecting plate (2) is connected to the vehicle frame connecting plate (1); the middle module connecting plate (2) comprises a first connecting portion (21) and a second connecting portion (22) connected in sequence, the first connecting portion (21) and the second connecting portion (22) are both used for fixed connection to the vehicle frame middle module (200), and the extension directions of the first connecting portion (21) and the second connecting portion (22) form an angle; A first reinforcement member (3) comprises a first extension plate (31), a first fillet (32), a first transition section (33), a second fillet (34) and a second extension plate (35) connected in sequence, wherein the first extension plate (31) is fixedly connected to the first connection portion (21), and the second extension plate (35) is fixedly connected to the second connection portion (22); the first extension plate (31) and the second extension plate (35) have the same thickness; the first fillet (32) and the second fillet (34) are fillets of unequal thickness; and the thickness of the thickest parts of the first fillet (32) and the second fillet (34) are both greater than the thickness of the first extension plate (31) and the second extension plate (35); The thickness of the first extension plate (31) and the second extension plate (35) are both t1, the thickness of the thickest part of the first fillet (32) and the second fillet (34) is t2, the thickness of the first transition section (33) is t3, t2 / t1≥4 / 3, t1>t3; The middle module connecting plate (2) is U-shaped, and the middle module connecting plate (2) further includes a third connecting portion (23) connected to the second connecting portion (22), the third connecting portion (23) being used for fixed connection to the vehicle frame middle module (200), the second extension plate (35) of the first reinforcement (3) being fixedly connected to the vehicle frame connecting plate (1), and the vehicle frame middle module connection structure further includes a second reinforcement (4), the second reinforcement (4) being fixedly connected to the vehicle frame connecting plate (1) and the third connecting portion (23) at the same time; The vehicle frame mid-module connection structure further comprises a cab mounting structure (7), the cab mounting structure (7) comprising a support rib (71) fixedly connected to the upper portion of the second reinforcement (4) and a cab mounting portion (72) fixedly connected to the support rib (71), the cab mounting portion (72) being annular and having a cab mounting hole (721) for cooperating with a cab floor.

2. The vehicle frame mid-module connection structure according to claim 1, characterized in that: The thicknesses of the first connecting portion (21), the second connecting portion (22), the third connecting portion (23), the first extension plate (31), the second extension plate (35) and the second reinforcement member (4) are all equal.

3. The vehicle frame mid-module connection structure according to claim 1, characterized in that: The vehicle frame mid-module connection structure further includes a fender mounting structure (6), the fender mounting structure (6) including a first fender mounting plate (61) fixedly connected to the first connection portion (21) and a second fender mounting plate (62) fixedly connected to the third connection portion (23), the first fender mounting plate (61) and the second fender mounting plate (62) being used for mounting a fender fixing bracket.

4. The vehicle frame mid-module connection structure according to claim 1, characterized in that: A plurality of the support ribs (71) are arranged at intervals, and the cab mounting portion (72) is fixedly connected to the plurality of the support ribs (71) at the same time. Among the plurality of the support ribs (71), the thickness of the support ribs (71) at the two ends is greater than the thickness of the support rib (71) at the middle.

5. The vehicle frame mid-module connection structure according to claim 1, characterized in that: The third connecting portion (23) has a first section and a second section, the second section is connected to the second connecting portion (22), and the width of the first section is smaller than the width of the second section. The frame mid-module connection structure also includes a third reinforcement member (5), the third reinforcement member (5) includes a third extension plate (51), a third fillet (52), a second transition section (53), a fourth fillet (54) and a fourth extension plate (55) connected in sequence, the third extension plate (51) is fixedly connected to the first section, and the fourth extension plate (55) is fixedly connected to the second section and the frame connection plate (1) at the same time.

6. The vehicle frame mid-module connection structure according to claim 5, characterized in that: The thickness of the first connecting portion (21), the second connecting portion (22), the third connecting portion (23), the first extension plate (31), the second extension plate (35) and the second reinforcement (4) are all t1, the thickness of the third extension plate (51) and the second transition section (53) are the same, and both are t5, and the thickness of the fourth extension plate (55) is t6, t5 / t1≥4 / 3, and t6>t5.

7. The vehicle frame mid-module connection structure according to claim 5, characterized in that: The vehicle frame mid-module connection structure further comprises two leaf spring mounting structures (8) arranged at intervals, wherein the leaf spring mounting structures (8) comprise a connecting section (81) and a leaf spring mounting portion (82) arranged on the connecting section (81), the leaf spring mounting portions (82) of the two leaf spring mounting structures (8) having leaf spring mounting holes (821) for mounting leaf springs, wherein the connecting section (81) of one leaf spring mounting structure (8) is fixedly connected to the vehicle frame connection plate (1), and the connecting section (81) of the other leaf spring mounting structure (8) is fixedly connected to the third reinforcement (5).

8. The vehicle frame mid-module connection structure according to claim 7, characterized in that: The axial direction of the leaf spring mounting hole (821) is parallel to the front-rear direction of the vehicle body, and along the left-right direction of the vehicle body, the thickness of the connecting section (81) connected to the frame connecting plate (1) is not greater than the thickness of the connecting section (81) connected to the third reinforcement (5).

9. The vehicle frame mid-module connection structure according to any one of claims 1 to 8, characterized in that: The vehicle frame middle module connection structure is integrally cast.

10. The frame assembly is characterized in that: The invention comprises a vehicle frame mid-module connection structure according to any one of claims 1 to 9, and further comprises a vehicle frame (100), wherein a vehicle frame mid-module (200) is fixedly connected to the middle of the vehicle frame (100), and the vehicle frame mid-module connection structure simultaneously connects the vehicle frame (100) and the vehicle frame mid-module (200).

11. The vehicle frame assembly according to claim 10, characterized in that: The vehicle frame (100) includes two longitudinal beams (110) that are arranged in parallel and at intervals, the mid-frame module (200) simultaneously passes through the two longitudinal beams (110), and four mid-frame module connection structures are provided, wherein two of the mid-frame module connection structures are connected to one of the longitudinal beams (110), and the two mid-frame module connection structures are respectively located at the front and rear ends of the mid-frame module (200), and the other two mid-frame module connection structures are connected to another of the longitudinal beams (110), and the two mid-frame module connection structures are respectively located at the front and rear ends of the mid-frame module (200).

12. A vehicle, characterized in that The vehicle frame assembly comprises the vehicle frame assembly according to claim 10 or 11, and further comprises a vehicle frame middle module (200), wherein the vehicle frame middle module (200) is fixedly connected to the middle portion of the vehicle frame (100).

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