Frame assembly and vehicle

Abstract

The utility model provides a kind of frame assembly and vehicle, frame assembly includes longitudinal beam, and multiple cross beams connected with longitudinal beam. Among them, the material quality of longitudinal beam and cross beam is all high-strength steel material with yield strength greater than or equal to 980MPa, since the strength of steel material is increased, the thickness of above-mentioned longitudinal beam and cross beam is reduced, the weight of entire frame assembly can be effectively reduced;And above-mentioned frame assembly is provided with multiple cross beams, the arrangement position of multiple cross beams is uniform and cross section shape is not exactly the same, the torsional stiffness of frame assembly can be effectively improved, and different cross section shape cross beam can be set in different positions, to meet the stress demand of different positions.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicles, specifically to a vehicle frame assembly and a vehicle. Background Technology

[0002] With the continued implementation of policies to control overloading and weight limits, the demand for lightweight products in the transportation market is further increasing. Current technologies for lightweight vehicle design focus on reducing the weight of the vehicle frame.

[0003] Existing lightweight frame designs have the following problems: 1) The strength of the steel used in the longitudinal beams of the frame has not been significantly improved, resulting in an insignificant weight reduction effect; 2) Some of the crossbeams on the frame are made of castings, which are heavy and costly; 3) The crossbeams on the frame are located at the rear and there are few of them, resulting in insufficient torsional stiffness of the frame. Utility Model Content

[0004] In view of this, the present invention aims to provide a chassis assembly and a vehicle to solve the problems of poor weight reduction, high cost, and insufficient torsional stiffness of existing chassis assemblies.

[0005] To solve the above-mentioned technical problems, this utility model provides a vehicle frame assembly, comprising: Longitudinal beam; and multiple crossbeams connected to the longitudinal beam; The longitudinal beams and the transverse beams are both made of steel with a yield strength greater than or equal to 980 MPa; the transverse beams are evenly arranged along the length of the longitudinal beams and their cross-sectional shapes are not exactly the same.

[0006] In one embodiment, the longitudinal beam includes a top plate, a side plate, and a bottom plate connected in sequence. The top plate and bottom plate of the longitudinal beam are disposed opposite to each other at both ends of the side plate of the longitudinal beam, and the ends of the top plate and bottom plate of the longitudinal beam away from the side plate of the longitudinal beam form a first opening; Each of the multiple crossbeams has a connecting plate at both ends along its own extension direction. The connecting plate extends into the first opening of the longitudinal beam and is connected to the side plate of the longitudinal beam.

[0007] In one embodiment, the longitudinal beam is provided with an inner reinforcing plate, the inner reinforcing plate at least abutting against the side plate of the longitudinal beam, and the connecting plate is connected to the inner reinforcing plate.

[0008] In one embodiment, the frame assembly includes a first crossbeam, a second crossbeam, a third crossbeam, and a fourth crossbeam; The first crossbeam, the second crossbeam, the third crossbeam, and the fourth crossbeam are arranged sequentially along the length of the longitudinal beam; The first and third crossbeams are arched crossbeams; the second crossbeam is a box-shaped crossbeam; and the fourth crossbeam is a cast tube beam.

[0009] In one embodiment, the first crossbeam has a first crossbeam top plate, a first crossbeam side plate, and a first crossbeam bottom plate connected in sequence, as well as a first connecting top plate and a first connecting bottom plate; the inner reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate; The top plate and bottom plate of the first crossbeam are disposed opposite to each other at both ends of the side plate of the first crossbeam, and the ends of the top plate and bottom plate of the first crossbeam away from the side plate of the first crossbeam form a second opening; The first connecting top plate is connected to both ends of the first crossbeam top plate along its own extension direction; the first connecting bottom plate is connected to both ends of the first crossbeam bottom plate along its own extension direction. The upper reinforcing plate includes an upper reinforcing top plate and an upper reinforcing side plate. The upper reinforcing top plate is stacked and fixedly connected to the longitudinal beam top plate, and the upper reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate. The first connecting top plate is connected to the upper reinforcing side plate. The lower reinforcing plate includes a lower reinforcing side plate and a lower reinforcing bottom plate. The lower reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate, and the lower reinforcing bottom plate is stacked and fixedly connected to the longitudinal beam bottom plate. The first connecting bottom plate is connected to the lower reinforcing side plate.

[0010] In one embodiment, the second crossbeam has a second crossbeam top plate, a second crossbeam side plate, and a second crossbeam bottom plate, as well as a second connecting top plate and a second connecting bottom plate; the inner reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate; The top plate of the second crossbeam, the side plate of the second crossbeam, and the bottom plate of the second crossbeam are connected in sequence to form a closed-loop structure; The second connecting top plate is connected to both ends of the second crossbeam top plate along its own extension direction; the second connecting bottom plate is connected to both ends of the second crossbeam bottom plate along its own extension direction. The upper reinforcing plate includes an upper reinforcing top plate and an upper reinforcing side plate. The upper reinforcing top plate is stacked and fixedly connected to the longitudinal beam top plate, and the upper reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate. The second connecting top plate is connected to the upper reinforcing side plate. The lower reinforcing plate includes a lower reinforcing side plate and a lower reinforcing bottom plate. The lower reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate, and the lower reinforcing bottom plate is stacked and fixedly connected to the longitudinal beam bottom plate. The second connecting bottom plate is connected to the lower reinforcing side plate.

[0011] In one embodiment, the third crossbeam has a third crossbeam top plate, a third crossbeam side plate, and a third crossbeam bottom plate connected in sequence, as well as a third connecting top plate and a third connecting bottom plate; the inner reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate; The top plate and bottom plate of the third crossbeam are disposed opposite to each other at both ends of the side plate of the third crossbeam, and the ends of the top plate and bottom plate of the third crossbeam away from the side plate of the third crossbeam form a third opening; The third connecting top plate is connected to both ends of the third crossbeam top plate along its own extension direction; the third connecting bottom plate is connected to both ends of the third crossbeam bottom plate along its own extension direction. The upper reinforcing plate includes an upper reinforcing top plate and an upper reinforcing side plate. The upper reinforcing top plate is stacked and fixedly connected to the longitudinal beam top plate, and the upper reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate. The third connecting top plate is connected to the upper reinforcing side plate. The lower reinforcing plate includes a lower reinforcing side plate and a lower reinforcing bottom plate. The lower reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate, and the lower reinforcing bottom plate is stacked and fixedly connected to the longitudinal beam bottom plate. The third connecting bottom plate is connected to the lower reinforcing side plate.

[0012] In one embodiment, the second opening of the first crossbeam and the third opening of the third crossbeam are arranged opposite each other along the length direction of the longitudinal beam.

[0013] In one embodiment, the inner reinforcing plate includes an inner lining plate; the inner lining plate is stacked and fixedly connected to the longitudinal beam side plate, and both ends of the fourth cross beam are respectively connected to the inner lining plate.

[0014] To address the aforementioned technical problems, this utility model also provides a vehicle, including the frame assembly described above.

[0015] Compared with existing vehicle frame structures, the vehicle frame assembly provided in this embodiment of the present invention has the following advantages: The vehicle frame assembly provided in this embodiment includes longitudinal beams and multiple crossbeams connected to the longitudinal beams. Both the longitudinal beams and crossbeams are made of high-strength steel with a yield strength greater than or equal to 980 MPa. Due to the increased strength of the steel, the thickness of the longitudinal beams and crossbeams is reduced, effectively lowering the weight of the entire vehicle frame assembly. Furthermore, the vehicle frame assembly includes multiple crossbeams arranged evenly with varying cross-sectional shapes, effectively improving the torsional stiffness of the vehicle frame assembly. Different cross-sectional shapes can be used at different locations to meet the stress requirements of different positions. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of the frame assembly provided in an embodiment of this utility model.

[0017] Figure 2 The diagram shows the structure of the first and second longitudinal beams provided in an embodiment of this utility model.

[0018] Figure 3 The diagram shows the connection relationship between the first crossbeam, the second crossbeam, the third crossbeam, and the fourth crossbeam and the first longitudinal beam provided in an embodiment of this utility model.

[0019] Figure 4 The diagram shown is a structural schematic of the inner reinforcing plate provided in an embodiment of this utility model.

[0020] Figure 5 The diagram shown is a structural schematic of the first crossbeam provided in an embodiment of this utility model.

[0021] Figure 6 The diagram shown is a structural schematic of the second crossbeam provided in an embodiment of this utility model.

[0022] Figure 7 The diagram shown is a structural schematic of the third crossbeam provided in an embodiment of this utility model.

[0023] Figure 8 The diagram shown is a structural schematic of the fourth crossbeam provided in an embodiment of this utility model.

[0024] The explanations of the reference numerals in the accompanying drawings are as follows: 10-First longitudinal beam; 100-Top plate of longitudinal beam; 101-Side plate of longitudinal beam; 102-Bottom plate of longitudinal beam; 103-First opening; 104-Upper reinforcing plate; 105-Lower reinforcing plate; 106-Inner lining plate; 1040-Upper reinforcing top plate; 1041-Upper reinforcing side plate; 1050-Lower reinforcing side plate; 1051-Lower reinforcing bottom plate; 11-Second longitudinal beam; 12-First crossbeam; 120-Top plate of first crossbeam; 121-Side plate of first crossbeam; 122-Bottom plate of first crossbeam; 123-First connecting top plate; 124-First connecting bottom plate; 125-Second opening; 126-First main body; 127-First bending section; 13-Second crossbeam; 130-Top plate of the second crossbeam; 131-Side plate of the second crossbeam; 132-Bottom plate of the second crossbeam; 133-Second connecting top plate; 134-Second connecting bottom plate; 135-Second main body; 136-Second bending section; 14-Third crossbeam; 140-Top plate of the third crossbeam; 141-Side plate of the third crossbeam; 142-Bottom plate of the third crossbeam; 143-Third connecting top plate; 144-Third connecting bottom plate; 145-Third opening; 146-Third main body; 147-Third bend; 15 - Fourth crossbeam; 150 - Fourth connecting plate; 16-First tube beam; 17-Second tube beam; 18-Tail beam; 19-First connecting beam support; 20-Second connecting beam support; 21-Saddle connecting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] As those skilled in the art will understand, existing heavy-duty truck chassis structures, in response to lightweight design requirements, typically use 610L or 700L steel. However, the strength of these steels has not been significantly improved, resulting in no substantial reduction in the thickness and weight of the chassis structure. Furthermore, most crossbeams in existing chassis structures are made of castings, which are heavy and costly. In addition, some models have a limited number of crossbeams, and their placement is often inappropriate, leading to insufficient torsional stiffness in the chassis structure.

[0029] Based on this, please refer to Figures 1-8This utility model provides a vehicle frame assembly, including: longitudinal beams and multiple crossbeams connected to the longitudinal beams; wherein, both the longitudinal beams and crossbeams are made of steel with a yield strength greater than or equal to 980MPa, and the multiple crossbeams are evenly arranged along the length of the longitudinal beams, and their cross-sectional shapes are not exactly the same. In this embodiment, both the longitudinal beams and crossbeams of the vehicle frame assembly are made of steel with a yield strength greater than or equal to 980MPa. Due to the increased yield strength, the vehicle frame assembly can reduce its structural thickness when facing the same load, thereby reducing the weight of the vehicle frame assembly and meeting the requirements of lightweight design. At the same time, the vehicle frame assembly is provided with multiple evenly arranged crossbeams, which can increase the torsional stiffness of the vehicle frame assembly. Moreover, the cross-sectional shapes of the four crossbeams are not exactly the same, so that crossbeams with different cross-sectional shapes can be used according to the stress requirements at different locations, so as to balance the load-bearing performance and lightweight design of the entire vehicle frame assembly.

[0030] Specifically, in this embodiment, such as Figure 1 As shown, the longitudinal beams include a first longitudinal beam 10 and a second longitudinal beam 11 arranged parallel to each other; the multiple crossbeams include a first crossbeam 12, a second crossbeam 13, a third crossbeam 14, and a fourth crossbeam 15. The first crossbeam 12, the second crossbeam 13, and the third crossbeam 14 are all made of 980LE type steel, while the fourth crossbeam 15, being a cast tubular beam, can have a slightly lower yield strength. In some other embodiments, the frame assembly material can also be ASTM 5140 type steel, T980 type steel, or 1100MP type steel, etc., with a yield strength greater than 980MPa. This embodiment does not impose any limitations on this.

[0031] like Figures 2-3As shown, the longitudinal beam includes a longitudinal beam top plate 100, a longitudinal beam side plate 101, and a longitudinal beam bottom plate 102 connected in sequence; the longitudinal beam top plate 100 and the longitudinal beam bottom plate 102 are disposed opposite to each other at both ends of the longitudinal beam side plate 101, and the ends of the longitudinal beam top plate 100 and the longitudinal beam bottom plate 102 away from the longitudinal beam side plate 101 form a first opening 103; multiple crossbeams are provided with connecting plates at both ends along their own extension direction, the connecting plates extend into the first opening 103 of the longitudinal beam and are connected to the longitudinal beam side plate 101. In this embodiment, both the first longitudinal beam 10 and the second longitudinal beam 11 are provided with a longitudinal beam top plate 100, a longitudinal beam side plate 101, and a longitudinal beam bottom plate 102 connected in sequence. The cross-sectional shape of the first longitudinal beam 10 and the second longitudinal beam 11 is open-ring. The same side of the longitudinal beam top plate 100 and the longitudinal beam bottom plate 102 are respectively connected to both ends of the longitudinal beam side plate 101. The ends of the longitudinal beam top plate 100 and the longitudinal beam bottom plate 102 away from the longitudinal beam side plate 101 form a first opening 103. The first opening 103 of the first longitudinal beam 10 and the first opening 103 of the second longitudinal beam 11 are arranged facing each other to form a U-shaped longitudinal beam. Since the U-shaped longitudinal beam has good bending and torsional resistance, it can provide an optimized force transmission path and stress distribution. It can also be integrally stamped and formed, and can provide an installation plane for key joints and accessories. Therefore, the U-shaped longitudinal beam can effectively improve the NVH (Noise, Vibration and Harshness) performance and fatigue strength of the whole vehicle.

[0032] Exemplary, the aforementioned crossbeams are respectively connected to the longitudinal beam side plates 101 of the first longitudinal beam 10 and the second longitudinal beam 11 via their respective connecting plates. The connection between the connecting plates and the longitudinal beam side plates 101 can be achieved through fasteners. For example, both the connecting plates and the longitudinal beam side plates 101 have connecting holes, and fasteners are sequentially inserted through these holes to achieve the connection. Optionally, the fasteners can be bolts.

[0033] Please refer to Figure 4The longitudinal beam is provided with an inner reinforcing plate, which at least abuts against the longitudinal beam side plate 101, and the connecting plate is connected to the inner reinforcing plate. In this embodiment, both the first longitudinal beam 10 and the second longitudinal beam 11 are provided with inner reinforcing plates, which include an upper reinforcing plate 104, a lower reinforcing plate 105, and an inner lining plate 106. The upper reinforcing plate 104 is located at the upper end of the longitudinal beam and abuts against and is fixed to the longitudinal beam top plate 100 and the longitudinal beam side plate 101, respectively; the lower reinforcing plate 105 is located at the lower end of the longitudinal beam and abuts against and is fixed to the longitudinal beam side plate 101 and the longitudinal beam bottom plate 102, respectively; the inner lining plate 106 is located on the inner side of the longitudinal beam and abuts against and is fixed to the longitudinal beam top plate 100, the longitudinal beam side plate 101, and the longitudinal beam bottom plate 102, respectively. The internal reinforcing plate further enhances the structural stability of the longitudinal beam in this area. Optionally, the material of the internal reinforcing plate can be the same as that of the longitudinal and transverse beams, such as 980LE steel, or it can be a different material. The thickness of the internal reinforcing plate can be less than the thickness of the longitudinal beam; for example, the thickness of the internal reinforcing plate is 4mm, and the thickness of the longitudinal beam is 6mm. It should be noted that the thickness direction refers to... Figure 1 The direction of extension of the beam in the middle.

[0034] like Figure 1 As shown, the first crossbeam 12, the second crossbeam 13, the third crossbeam 14, and the fourth crossbeam 15 are arranged sequentially along the length of the longitudinal beams; the first crossbeam 12 and the third crossbeam 14 are arched crossbeams; the second crossbeam 13 is a box-shaped crossbeam; and the fourth crossbeam 15 is a cast tubular beam. Those skilled in the art can select crossbeams with different cross-sectional shapes at different locations based on the actual load conditions of the frame assembly. Furthermore, the manufacturing methods for the aforementioned crossbeams can include bending, welding, or casting. Those skilled in the art will understand that bent crossbeams have high strength, low cost, and short production cycles, but their shape is limited and they are subject to minimum bending radius restrictions; welded crossbeams offer greater design freedom and can manufacture complex hollow and variable cross-sectional structures, but they suffer from welding stress and deformation, requiring high levels of operator skill and quality control; cast crossbeams offer the highest design freedom, capable of being made into any complex shape with excellent overall integrity, but they have higher mold costs, longer production cycles, and their material strength is typically lower than that of rolled sheet metal. Those skilled in the art can select appropriate forming processes and cross-sectional shapes based on actual conditions; this embodiment does not impose any limitations on this.

[0035] As an optional embodiment, please refer to Figure 5The first crossbeam 12 has a first crossbeam top plate 120, a first crossbeam side plate 121, and a first crossbeam bottom plate 122 connected in sequence, as well as a first connecting top plate 123 and a first connecting bottom plate 124; the inner reinforcing plate includes an upper reinforcing plate 104 and a lower reinforcing plate 105; the first crossbeam top plate 120 and the first crossbeam bottom plate 122 are disposed opposite to each other at both ends of the first crossbeam side plate 121, and the ends of the first crossbeam top plate 120 and the first crossbeam bottom plate 122 away from the first crossbeam side plate 121 form a second opening 125; the first connecting top plate 123 is connected to both ends of the first crossbeam top plate 120 along its own extension direction; the first connecting bottom plate 124 is connected to the first crossbeam bottom plate 124. Plate 122 is connected at both ends along its extension direction; the upper reinforcing plate 104 includes an upper reinforcing top plate 1040 and an upper reinforcing side plate 1041, the upper reinforcing top plate 1040 is stacked and fixedly connected to the longitudinal beam top plate 100, the upper reinforcing side plate 1041 is stacked and fixedly connected to the longitudinal beam side plate 101, and the first connecting top plate 123 is connected to the upper reinforcing side plate 1041; the lower reinforcing plate 105 includes a lower reinforcing side plate 1050 and a lower reinforcing bottom plate 1051, the lower reinforcing side plate 1050 is stacked and fixedly connected to the longitudinal beam side plate 101, the lower reinforcing bottom plate 1051 is stacked and fixedly connected to the longitudinal beam bottom plate 102, and the first connecting bottom plate 124 is connected to the lower reinforcing side plate 1050.

[0036] In this embodiment, the first crossbeam 12, the second crossbeam 13, the third crossbeam 14, and the fourth crossbeam 15 are arranged sequentially from front to back along the length of the longitudinal beams of the vehicle body. The first crossbeam 12 is an arched crossbeam, and the second opening 125 is positioned towards the direction close to the second crossbeam 13. In this way, the first crossbeam 12 can withstand collisions near the front of the vehicle, so that the first crossbeam 12 will not be completely deformed or broken when subjected to collision forces near the front of the vehicle, thereby improving the vehicle's safety performance.

[0037] Specifically, such as Figure 5 As shown, both the first connecting top plate 123 and the first connecting bottom plate 124 are composed of a first main body 126 and a first bent portion 127. The first main body 126 is arranged along the extension direction of the first crossbeam 12, and the first bent portion 127 bends upwards in a direction perpendicular to the first crossbeam 12. Multiple connecting holes are provided on the first bent portion 127. The first connecting top plate 123 is connected to the upper reinforcing side plate 1041 through the connecting holes on the first bent portion 127. Fasteners pass sequentially through the first connecting top plate 123, the upper reinforcing side plate 1041, and the longitudinal beam side plate 101 to achieve the connection. The first connecting bottom plate 124 is connected to the lower reinforcing side plate 1050 through the connecting holes on the first bent portion 127. Fasteners pass sequentially through the first connecting bottom plate 124, the lower reinforcing side plate 1050, and the longitudinal beam side plate 101 to achieve the connection. Optionally, the fasteners can be bolts.

[0038] In another alternative embodiment, please refer to Figure 6 The second crossbeam 13 has a second crossbeam top plate 130, a second crossbeam side plate 131, and a second crossbeam bottom plate 132, as well as a second connecting top plate 133 and a second connecting bottom plate 134; the inner reinforcing plate includes an upper reinforcing plate 104 and a lower reinforcing plate 105; the second crossbeam top plate 130, the second crossbeam side plate 131, and the second crossbeam bottom plate 132 are connected in sequence to form a closed-loop structure; the second connecting top plate 133 is connected to both ends of the second crossbeam top plate 130 along its own extension direction; the second connecting bottom plate 134 is connected to both ends of the second crossbeam bottom plate 132 along its own extension direction; the upper reinforcing plate 134... Plate 104 includes an upper reinforcing top plate 1040 and an upper reinforcing side plate 1041. The upper reinforcing top plate 1040 is stacked and fixedly connected to the longitudinal beam top plate 100, and the upper reinforcing side plate 1041 is stacked and fixedly connected to the longitudinal beam side plate 101. A second connecting top plate 133 is connected to the upper reinforcing side plate 1041. The lower reinforcing plate 105 includes a lower reinforcing side plate 1050 and a lower reinforcing bottom plate 1051. The lower reinforcing side plate 1050 is stacked and fixedly connected to the longitudinal beam side plate 101, and the lower reinforcing bottom plate 1051 is stacked and fixedly connected to the longitudinal beam bottom plate 102. A second connecting bottom plate 134 is connected to the lower reinforcing side plate 1050.

[0039] In this embodiment, the second crossbeam 13 is a closed-loop structure formed by sequentially connecting the top plate 130, the side plate 131, and the bottom plate 132 of the second crossbeam. Compared with the arched structure of the first crossbeam 12, the closed-loop structure of the second crossbeam 13 can provide higher load-bearing capacity to meet the load-bearing requirements of areas with high loads.

[0040] Specifically, such as Figure 6 As shown, both the second connecting top plate 133 and the second connecting bottom plate 134 are composed of a second main body 135 and a second bent portion 136. The second main body 135 is arranged along the extension direction of the second crossbeam 13, and the second bent portion 136 bends downwards in a direction perpendicular to the second crossbeam 13. Multiple connecting holes are provided on the second bent portion 136. The second connecting top plate 133 is connected to the upper reinforcing side plate 1041 through the connecting holes on the second bent portion 136. Fasteners pass sequentially through the second connecting top plate 133, the upper reinforcing side plate 1041, and the longitudinal beam side plate 101 to achieve the connection. The second connecting bottom plate 134 is connected to the lower reinforcing side plate 1050 through the connecting holes on the second bent portion 136. Fasteners pass sequentially through the second connecting bottom plate 134, the lower reinforcing side plate 1050, and the longitudinal beam side plate 101 to achieve the connection. Optionally, the fasteners can be bolts.

[0041] In another embodiment, please refer to Figure 7The third crossbeam 14 has a third crossbeam top plate 140, a third crossbeam side plate 141, and a third crossbeam bottom plate 142 connected in sequence, as well as a third connecting top plate 143 and a third connecting bottom plate 144; the inner reinforcing plate includes an upper reinforcing plate 104 and a lower reinforcing plate 105; the third crossbeam top plate 140 and the third crossbeam bottom plate 142 are disposed opposite to each other at both ends of the third crossbeam side plate 141, and the ends of the third crossbeam top plate 140 and the third crossbeam bottom plate 142 away from the third crossbeam side plate 141 form a third opening 145; the third connecting top plate 143 is connected to both ends of the third crossbeam top plate 140 along its own extension direction; the third connecting bottom plate 144 is connected to the third crossbeam bottom plate 144. Plate 142 is connected at both ends along its extension direction; the upper reinforcing plate 104 includes an upper reinforcing top plate 1040 and an upper reinforcing side plate 1041, the upper reinforcing top plate 1040 is stacked and fixedly connected to the longitudinal beam top plate 100, the upper reinforcing side plate 1041 is stacked and fixedly connected to the longitudinal beam side plate 101, and the third connecting top plate 143 is connected to the upper reinforcing side plate 1041; the lower reinforcing plate 105 includes a lower reinforcing side plate 1050 and a lower reinforcing bottom plate 1051, the lower reinforcing side plate 1050 is stacked and fixedly connected to the longitudinal beam side plate 101, the lower reinforcing bottom plate 1051 is stacked and fixedly connected to the longitudinal beam bottom plate 102, and the third connecting bottom plate 144 is connected to the lower reinforcing side plate 1050.

[0042] In this embodiment, the first crossbeam 12, the second crossbeam 13, the third crossbeam 14, and the fourth crossbeam 15 are arranged sequentially from front to rear along the length of the longitudinal beams of the vehicle body. The third crossbeam 14 is an arched crossbeam, and the third opening 145 is positioned towards the direction close to the second crossbeam 13. In this way, the third crossbeam 14 can withstand collisions near the rear of the vehicle, so that the third crossbeam 14 will not be completely deformed or broken when subjected to collision forces near the rear of the vehicle, thereby improving the vehicle's safety performance.

[0043] Specifically, such as Figure 7 As shown, both the third connecting top plate 143 and the third connecting bottom plate 144 are composed of a third main body 146 and a third bending portion 147. The third main body 146 is arranged along the extension direction of the third crossbeam 14, and the third bending portion 147 bends downwards in a direction perpendicular to the third crossbeam 14. Multiple connecting holes are provided on the third bending portion 147. The third connecting top plate 143 is connected to the upper reinforcing side plate 1041 through the connecting holes on the third bending portion 147. Fasteners pass sequentially through the third connecting top plate 143, the upper reinforcing side plate 1041, and the longitudinal beam side plate 101 to achieve the connection. The third connecting bottom plate 144 is connected to the lower reinforcing side plate 1050 through the connecting holes on the third bending portion 147. Fasteners pass sequentially through the third connecting bottom plate 144, the lower reinforcing side plate 1050, and the longitudinal beam side plate 101 to achieve the connection. Optionally, the fasteners can be bolts.

[0044] Please refer to Figure 1 and Figure 3 The second opening 125 of the first crossbeam 12 and the third opening 145 of the third crossbeam 14 are arranged opposite each other along the length of the longitudinal beam. Those skilled in the art can reasonably configure the orientation of the second opening 125 and the third opening 145 according to the stress requirements of different positions of the frame assembly. In some embodiments, the second opening 125 and the third opening 145 may also be opened in the same direction. This embodiment does not limit this.

[0045] Please refer to Figure 1 , Figure 3 and Figure 8 The inner reinforcing plate includes an inner lining plate 106; the inner lining plate 106 is stacked and fixedly connected to the longitudinal beam side plate 101, and both ends of the fourth crossbeam 15 are respectively connected to the inner lining plate 106. In this embodiment, the fourth crossbeam 15 is a casting, and both ends of the fourth crossbeam 15 along its extension direction are respectively provided with fourth connecting plates 150, and the fourth crossbeam 15 is connected to the inner lining plate 106 through the fourth connecting plates 150. Specifically, the fourth connecting plate 150 is provided with multiple connecting holes, and fasteners pass through the fourth connecting plate 150, the inner lining plate 106 and the longitudinal beam side plate 101 in sequence to achieve connection. Optionally, the above fasteners can be bolts.

[0046] In some other examples, the first crossbeam 12, the second crossbeam 13, the third crossbeam 14, and the fourth crossbeam 15 may also be crossbeams with different cross-sectional shapes made by other forming methods, which is not a limitation for those skilled in the art.

[0047] like Figure 1 As shown, the aforementioned frame assembly also includes a first connecting beam bracket 19, a second connecting beam bracket 20, a first tube beam 16, a second tube beam 17, a rear beam 18, and a saddle connecting plate 21. The first connecting beam bracket 19 is located at the end of the first longitudinal beam 10 near the front of the vehicle, the second connecting beam bracket 20 is located at the end of the second longitudinal beam 11 near the front of the vehicle, the two ends of the first tube beam 16 are respectively connected to the ends of the first connecting beam bracket 19 and the second connecting beam bracket 20, the two ends of the second tube beam 17 are respectively connected to the other ends of the first connecting beam bracket 19 and the second connecting beam bracket 20, the rear beam 18 is connected to the ends of the first longitudinal beam 10 and the second longitudinal beam 11 near the rear of the vehicle, and the saddle connecting plate 21 is located at the position of the first longitudinal beam 10 and the second longitudinal beam 11 near the rear of the vehicle, and is connected to the outer wall of the longitudinal beam side plate 101 of the first longitudinal beam 10 and the second longitudinal beam 11, respectively.

[0048] Specifically, the first connecting beam bracket 19 and the second connecting beam bracket 20 are bolted or welded to the first longitudinal beam 10 and the second longitudinal beam 11, providing precise and reliable connection points for the first tube beam 16 and the second tube beam 17, and transmitting the forces acting on the first tube beam 16 and the second tube beam 17 to the chassis. The first tube beam 16 and the second tube beam 17 are longitudinal beams supporting the cab; their upper ends connect to the cab, and their lower ends are connected to the longitudinal beams via the first connecting beam bracket 19 and the second connecting beam bracket 20, forming a rotation axis for the cab to tilt. The tail beam 18 maintains chassis rigidity, bears saddle loads, and resists complex torques. The saddle connecting plate 21 provides a high-strength connection surface for the saddle and disperses concentrated stress.

[0049] In another embodiment, this utility model also provides a vehicle including the frame assembly described above. Thus, by using the frame assembly described above, adjusting the material of the longitudinal and transverse beams to steel with a yield strength greater than or equal to 980 MPa reduces the thickness of the beams and longitudinal beams, thereby achieving weight reduction in the frame assembly and realizing a lightweight design. Simultaneously, the even arrangement of multiple transverse beams increases the torsional stiffness of the frame assembly, and the fact that the cross-sectional shapes of the multiple transverse beams are not entirely identical allows for the use of transverse beams with different cross-sectional shapes according to the stress requirements at different locations, thereby balancing the load-bearing capacity and lightweight design of the entire frame assembly.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle frame assembly, characterized in that, include: Longitudinal beam; and a plurality of crossbeams connected to the longitudinal beam, the crossbeams including a first crossbeam, a second crossbeam, a third crossbeam and a fourth crossbeam; The longitudinal beams and the transverse beams are both made of steel with a yield strength greater than or equal to 980 MPa; multiple transverse beams are evenly arranged along the length of the longitudinal beams and their cross-sectional shapes are not exactly the same; the first transverse beam and the third transverse beam are arched transverse beams; the second transverse beam is a box-shaped transverse beam; and the fourth transverse beam is a cast tube beam.

2. The frame assembly according to claim 1, characterized in that, The longitudinal beam includes a top plate, a side plate, and a bottom plate connected in sequence. The top plate and bottom plate of the longitudinal beam are disposed opposite to each other at both ends of the side plate of the longitudinal beam, and the ends of the top plate and bottom plate of the longitudinal beam away from the side plate of the longitudinal beam form a first opening; Each of the multiple crossbeams has a connecting plate at both ends along its own extension direction. The connecting plate extends into the first opening of the longitudinal beam and is connected to the side plate of the longitudinal beam.

3. The frame assembly according to claim 2, characterized in that, The longitudinal beam is provided with an inner reinforcing plate, which at least abuts against the side plate of the longitudinal beam, and the connecting plate is connected to the inner reinforcing plate.

4. The frame assembly according to claim 3, characterized in that, The first crossbeam has a first crossbeam top plate, a first crossbeam side plate, and a first crossbeam bottom plate connected in sequence, as well as a first connecting top plate and a first connecting bottom plate; the inner reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate; The top plate and bottom plate of the first crossbeam are disposed opposite to each other at both ends of the side plate of the first crossbeam, and the ends of the top plate and bottom plate of the first crossbeam away from the side plate of the first crossbeam form a second opening; The first connecting top plate is connected to both ends of the first crossbeam top plate along its own extension direction; the first connecting bottom plate is connected to both ends of the first crossbeam bottom plate along its own extension direction. The upper reinforcing plate includes an upper reinforcing top plate and an upper reinforcing side plate. The upper reinforcing top plate is stacked and fixedly connected to the longitudinal beam top plate, and the upper reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate. The first connecting top plate is connected to the upper reinforcing side plate. The lower reinforcing plate includes a lower reinforcing side plate and a lower reinforcing bottom plate. The lower reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate, and the lower reinforcing bottom plate is stacked and fixedly connected to the longitudinal beam bottom plate. The first connecting bottom plate is connected to the lower reinforcing side plate.

5. The frame assembly according to claim 3, characterized in that, The second crossbeam has a second crossbeam top plate, a second crossbeam side plate, and a second crossbeam bottom plate, as well as a second connecting top plate and a second connecting bottom plate; the inner reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate; The top plate of the second crossbeam, the side plate of the second crossbeam, and the bottom plate of the second crossbeam are connected in sequence to form a closed-loop structure; The second connecting top plate is connected to both ends of the second crossbeam top plate along its own extension direction; the second connecting bottom plate is connected to both ends of the second crossbeam bottom plate along its own extension direction. The upper reinforcing plate includes an upper reinforcing top plate and an upper reinforcing side plate. The upper reinforcing top plate is stacked and fixedly connected to the longitudinal beam top plate, and the upper reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate. The second connecting top plate is connected to the upper reinforcing side plate. The lower reinforcing plate includes a lower reinforcing side plate and a lower reinforcing bottom plate. The lower reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate, and the lower reinforcing bottom plate is stacked and fixedly connected to the longitudinal beam bottom plate. The second connecting bottom plate is connected to the lower reinforcing side plate.

6. The frame assembly according to claim 3, characterized in that, The third crossbeam has a third crossbeam top plate, a third crossbeam side plate, and a third crossbeam bottom plate connected in sequence, as well as a third connecting top plate and a third connecting bottom plate; the inner reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate; The top plate and bottom plate of the third crossbeam are disposed opposite to each other at both ends of the side plate of the third crossbeam, and the ends of the top plate and bottom plate of the third crossbeam away from the side plate of the third crossbeam form a third opening; The third connecting top plate is connected to both ends of the third crossbeam top plate along its own extension direction; the third connecting bottom plate is connected to both ends of the third crossbeam bottom plate along its own extension direction. The upper reinforcing plate includes an upper reinforcing top plate and an upper reinforcing side plate. The upper reinforcing top plate is stacked and fixedly connected to the longitudinal beam top plate, and the upper reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate. The third connecting top plate is connected to the upper reinforcing side plate. The lower reinforcing plate includes a lower reinforcing side plate and a lower reinforcing bottom plate. The lower reinforcing side plate is stacked and fixedly connected to the longitudinal beam side plate, and the lower reinforcing bottom plate is stacked and fixedly connected to the longitudinal beam bottom plate. The third connecting bottom plate is connected to the lower reinforcing side plate.

7. The frame assembly according to claim 4 or 6, characterized in that, The second opening of the first crossbeam and the third opening of the third crossbeam are arranged opposite each other along the length of the longitudinal beam.

8. The frame assembly according to claim 3, characterized in that, The inner reinforcing plate includes an inner lining plate; the inner lining plate is stacked and fixedly connected to the longitudinal beam side plate, and both ends of the fourth cross beam are respectively connected to the inner lining plate.

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

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