Suspension cross beam and off-road vehicle chassis

Abstract

The utility model discloses a suspension cross beam and an off-road vehicle chassis, which comprise an upper plate, a lower plate, a left plate, a right plate, a back plate, a cavity rib plate, an upper side rib plate, a lower side rib plate, a left side rib plate and a right side rib plate, the upper plate and the lower plate are provided with trapezoidal holes, the lower bottoms of the trapezoidal holes are located on the front sides of the upper plate and the lower plate, the left plate and the right plate are provided with inferior arc-shaped holes, the bottom edges of the inferior arc-shaped holes are located on the front sides of the left plate and the right plate, the back plate is located on the rear side of the first hollow structure, a cavity opening is formed in the center of the back plate, and the cavity rib plate is arranged along the edge of the cavity opening. The rear end of the cavity rib plate is connected with the back plate, the upper side rib plate, the lower side rib plate, the left side rib plate and the right side rib plate are connected to the upper side, the lower side, the left side and the right side of the cavity rib plate respectively, the limiting suspension cross beam is manufactured in an integrated forming mode, and bolt holes are formed in the left plate, the right plate and the upper plate.

Description

Technical Field

[0001] The utility model relates to the technical field of off-road vehicles, in particular to a suspension crossbeam and an off-road vehicle chassis. Background Art

[0002] In off-road vehicles, the suspension cross member connects the left and right longitudinal beams of the chassis frame to support the suspension system.

[0003] At present, most suspension crossbeams are formed by welding steel plates or by welding round tube profiles and casting supports. This form has a complex structure, a bloated appearance, occupies too much space, is too heavy, requires a large amount of welding, is relatively time-consuming and labor-intensive, and cannot guarantee a high tolerance dimensional accuracy.

[0004] Specifically, in the design process of a certain type of off-road vehicle chassis, due to the compact structure of the chassis and limited local space, the crossbeam is required to have a larger load-bearing capacity, higher strength, and a lightweight design, which puts high demands on the crossbeam. Taking into account the space limitations, lightweight and process requirements, the existing suspension crossbeam cannot meet the requirements, so a new crossbeam needs to be designed to meet the use requirements of a certain type of off-road vehicle chassis. Utility Model Content

[0005] The present application provides a suspension crossbeam and an off-road vehicle chassis, which solve the technical problem in the prior art that the off-road vehicle chassis structure is compact but the existing crossbeam cannot meet the requirements of greater bearing capacity, higher strength, lightweight and space limitation.

[0006] The present application provides a suspension crossbeam, comprising an upper plate, a lower plate, a left plate, a right plate, a back plate, a cavity rib plate, an upper rib plate, a lower rib plate, a left rib plate and a right rib plate. The upper plate, the left plate, the lower plate and the right plate are adjacent to each other in sequence and enclose a first hollow structure with an inverted trapezoidal cross section. The upper plate and the lower plate both have trapezoidal holes, and the lower bottoms of the trapezoidal holes are located on the front sides of the upper plate and the lower plate. The left plate and the right plate both have inferior arc holes, and the bottom edges of the inferior arc holes are located on the front sides of the left plate and the right plate. The back plate is located on the rear side of the first hollow structure. The back plate is connected to the upper plate, the lower plate, the left plate and the right plate. The back plate has a central position. The cavity opening, the cavity rib plate is located in the enclosed area of ​​the first hollow structure, the rear end of the cavity rib plate is connected to the back plate, the cavity rib plate is arranged along the edge of the cavity opening, the upper rib plate, the lower rib plate, the left rib plate and the right rib plate are respectively connected to the upper side, lower side, left side and right side of the cavity rib plate, the upper rib plate, the lower rib plate, the left rib plate and the right rib plate are all connected to the back plate, the upper rib plate, the lower rib plate, the left rib plate and the right rib plate are respectively connected to the upper plate, the lower plate, the left plate and the right plate, wherein the suspension cross beam is limited to be made by one-piece molding, and bolt holes are provided on the left plate, the right plate and the upper plate.

[0007] In some embodiments, the shape of the cavity opening is a combination of a regular trapezoid and a rectangle, in which a long side of the rectangle coincides with the lower base of the regular trapezoid, and the cavity ribs include a trapezoidal upper bottom rib, a trapezoidal left waist rib, a rectangular left short side rib, a rectangular lower long side rib, a rectangular right short side rib and a trapezoidal right waist rib, and the trapezoidal upper bottom rib, the trapezoidal left waist rib, the rectangular left short side rib, the rectangular lower long side rib, the rectangular right short side rib and the trapezoidal right waist rib are adjacent to each other in sequence and form a second hollow structure with a combined cross-section; wherein, the trapezoidal upper bottom rib, the trapezoidal left waist rib and the trapezoidal right waist rib are all connected to the upper rib, the rectangular lower long side rib is connected to the lower rib, the rectangular left short side rib is connected to the left rib, and the rectangular right short side rib is connected to the right rib.

[0008] In some embodiments, the upper rib plate includes a first upper rib plate, a second upper rib plate, a third upper rib plate and a fourth upper rib plate, all of which are arranged in the up-down direction, the first upper rib plate is connected to the left end of the trapezoidal upper bottom rib plate, the second upper rib plate is connected to the lower end of the trapezoidal left waist rib plate, the third upper rib plate is connected to the lower end of the trapezoidal right waist rib plate, and the fourth upper rib plate is connected to the right end of the trapezoidal upper bottom rib plate; the lower rib plate includes a first lower rib plate, a second lower rib plate, a third lower rib plate and a fourth lower rib plate, all of which are arranged in the up-down direction, the first lower rib plate is connected to the left end of the rectangular lower long side rib plate, the fourth lower rib plate is connected to the right end of the rectangular lower long side rib plate, and the second lower rib plate and the third lower rib plate are both connected to the rectangular lower long side rib plate The second lower rib plate and the third lower rib plate are located directly below the first upper rib plate and the fourth upper rib plate respectively; the left rib plate includes the first left rib plate and the second left rib plate, the right end of the first left rib plate is connected to the upper end of the rectangular left short side rib plate, the right end of the second left rib plate is connected to the lower end of the rectangular left short side rib plate, the left end of the first left rib plate is higher than the right end of the first left rib plate, and the second left rib plate is arranged along the left-right direction; the right rib plate includes the first right rib plate and the second right rib plate, the left end of the first right rib plate is connected to the lower end of the rectangular right short side rib plate, the left end of the second right rib plate is connected to the upper end of the rectangular right short side rib plate, the first right rib plate is arranged along the left-right direction, and the right end of the second right rib plate is higher than the left end of the second right rib plate.

[0009] In some embodiments, the upper base of the trapezoidal hole in the upper plate is spaced a first size from the rear side of the upper plate, and the upper base of the trapezoidal hole in the lower plate is also spaced a first size from the rear side of the lower plate, limiting the dimensions of the cavity rib plate, the upper rib plate, and the lower rib plate in the front-to-back direction to be the first size; the dimension of the left end of the left rib plate in the front-to-back direction is greater than the dimension of the right end of the left rib plate in the front-to-back direction, and the dimension of the right end of the right rib plate in the front-to-back direction is greater than the dimension of the left end of the right rib plate in the front-to-back direction.

[0010] In some embodiments, a blind avoidance hole is opened on the outer side of the left plate, and a blind avoidance hole is opened on the outer side of the right plate.

[0011] In some embodiments, there are some bolt holes opened on the left plate and the right plate facing the back plate, and bolt avoidance holes are opened on the back plate. The bolt avoidance holes are located on the left and right sides of the back plate, and the bolt avoidance holes are respectively arranged facing the corresponding bolt holes.

[0012] In some embodiments, the bolt holes include a first bolt hole located at the rear lower corner of the left plate, and a second bolt hole located at the rear lower corner of the right plate. The bolt avoidance holes include a first bolt avoidance hole directly opposite the first bolt hole, and a second bolt avoidance hole directly opposite the second bolt hole. The first bolt avoidance hole and the second bolt avoidance hole also provide drainage function.

[0013] In some embodiments, the back plate is provided with back plate weight reduction holes.

[0014] In some embodiments, the suspension crossbeam is made of aluminum alloy in one piece.

[0015] An off-road vehicle chassis comprises left and right longitudinal beams, the suspension cross beam is fixedly installed on the inner side of the left and right longitudinal beams by bolts, a suspension system is installed on the corresponding position of the outer side of the left and right longitudinal beams, and an upper mounting device is installed on the upper plate of the suspension cross beam by bolts.

[0016] The beneficial effects of the present application are as follows: an integrated overall design is achieved, the overall structural strength is good, and the tolerance dimensional accuracy is high; the forging can be achieved in one step through the mold, the structure is compact, and it is convenient for mass production, no welding is required, and production efficiency is improved and costs are saved; the finite element topological structure is optimized to ensure structural strength, space utilization and process requirements while achieving a lightweight design with better material distribution; by designing cavities, trapezoidal holes, and inferior arc holes, it has the advantage of reducing weight while ensuring that the strength meets the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0018] Figure 1 A structural schematic diagram of a suspension crossbeam provided in this application;

[0019] Figure 2 A rear view of a suspension cross member provided for this application;

[0020] Figure 3 A top view of a suspension beam provided in this application

[0021] Figure 4 A schematic diagram of a suspension crossbeam provided for the present application with detailed annotations;

[0022] Figure 5 A schematic diagram of the ribs of a suspension crossbeam provided in this application

[0023] Figures are marked: 110-upper plate, 120-lower plate, 130-left plate, 140-right plate, 150-trapezoidal hole, 160-inferior arc hole, 170-bolt hole, 171-first bolt hole, 172-second bolt hole, a-first size, 190-avoidance blind hole, 200-back plate, 210-cavity opening, 211-combined shape, 220-bolt avoidance hole, 221-first bolt avoidance hole, 222-second bolt avoidance hole, 230-back plate weight reduction hole, 300-cavity rib plate, 310-trapezoidal upper and bottom rib plate, 320-trapezoidal left waist rib plate, 330-rectangular shaped left short side rib plate, 340-rectangular lower long side rib plate, 350-rectangular right short side rib plate, 360-trapezoidal right waist rib plate, 410-upper side rib plate, 411-first upper rib plate, 412-second upper rib plate, 413-third upper rib plate, 414-fourth upper rib plate, 420-lower side rib plate, 421-first lower rib plate, 422-second lower rib plate, 423-third lower rib plate, 424-fourth lower rib plate, 430-left side rib plate, 431-first left rib plate, 432-second left rib plate, 440-right side rib plate, 441-first right rib plate, 442-second right rib plate. DETAILED DESCRIPTION

[0024] This embodiment discloses a suspension beam. Please refer to Figure 1 and Figure 2 The suspension cross beam includes an upper plate 110 , a lower plate 120 , a left plate 130 , a right plate 140 , a back plate 200 , a cavity rib plate 300 , an upper rib plate 410 , a lower rib plate 420 , a left rib plate 430 and a right rib plate 440 .

[0025] Please refer to Figure 1 and Figure 4 The upper plate 110, the left plate 130, the lower plate 120 and the right plate 140 are adjacent to each other in sequence and form a first hollow structure with an inverted trapezoidal cross section.

[0026] Please refer to Figure 3 and Figure 4 A trapezoidal hole 150 is provided on both the upper plate 110 and the lower plate 120. The trapezoidal hole 150 has a trapezoidal upper bottom, a lower bottom and two waist edges. The lower bottoms of the trapezoidal holes 150 are respectively located on the front sides of the upper plate 110 and the lower plate 120. The large-area trapezoidal hole 150 has a weight-reducing effect.

[0027] Please refer to Figure 4Both the left plate 130 and the right plate 140 are provided with inferior arc holes 160, and the bottom edges of the inferior arc holes 160 are respectively located at the front sides of the left plate 130 and the right plate 140, and the inferior arcs of the inferior arc holes 160 are located at the front side edge surfaces of the left plate 130 and the right plate 140, thereby playing an avoidance role.

[0028] Please refer to Figure 1 , Figure 2 and Figure 4 The back plate 200 is located at the rear side of the first hollow structure, and the back plate 200 is limited to be connected to the upper plate 110, the lower plate 120, the left plate 130, and the right plate 140. The back plate 200 has a cavity opening 210 at the center. The cavity rib plate 300 is located in the enclosed area of ​​the first hollow structure, and the rear end of the cavity rib plate 300 is connected to the back plate 200. Specifically, compared with reference Figure 1 and Figure 2 The cavity rib 300 is arranged along the edge of the cavity opening 210 , and the cavity rib 300 encloses and forms an internal cavity in the suspension cross beam.

[0029] Please refer to Figure 1 The upper rib plate 410 is located on the upper side of the cavity rib plate 300, the lower rib plate 420 is located on the lower side of the cavity rib plate 300, the left rib plate 430 is located on the left side of the cavity rib plate 300, and the right rib plate 440 is located on the left side of the cavity rib plate 300. Please refer to Figure 1 , Figure 2 and Figure 4 The upper rib plate 410, the lower rib plate 420, the left rib plate 430 and the right rib plate 440 are respectively connected to the upper side, the lower side, the left side and the right side of the cavity rib plate 300, and the upper rib plate 410, the lower rib plate 420, the left rib plate 430 and the right rib plate 440 are respectively connected to the upper plate 110, the lower plate 120, the left plate 130 and the right plate 140. Please refer to Figure 1 and Figure 4 The rear ends of the upper rib plate 410, the lower rib plate 420, the left rib plate 430 and the right rib plate 440 are all connected to the back plate 200, and the front ends of the upper rib plate 410, the lower rib plate 420, the left rib plate 430 and the right rib plate 440 are open.

[0030] Please refer to Figure 3 and Figure 4 The left plate 130, the right plate 140 and the upper plate 110 are all provided with bolt holes 170. The left plate 130 and the right plate 140 are detachably connected to the left and right longitudinal beams of the off-road vehicle by bolts, thereby increasing the bearing capacity of the frame. The bolt connection is convenient for later maintenance and disassembly.

[0031] In this solution, the suspension crossbeam is manufactured by integral molding, and the forging can be realized in one step by using a mold. The structure is compact, and it is convenient for mass production, does not require welding, improves production efficiency, and saves costs. This solution has the advantage of reducing weight while ensuring that the strength meets the use requirements by designing the cavity, the trapezoidal hole 150, and the inferior arc hole 160.

[0032] From the perspective of the overall structure, this solution achieves an integrated overall design with good overall structural strength and high tolerance dimensional accuracy. It utilizes finite element topological structure optimization to ensure structural strength, space utilization and process requirements while achieving a lightweight design with optimal material distribution.

[0033] In some embodiments, the suspension crossbeam is made of aluminum alloy in one piece, achieving an integrated all-aluminum alloy overall design.

[0034] In some embodiments, see Figure 1 The shape of the cavity opening 210 is designed to be a combination shape 211 of a regular trapezoid and a rectangle, in which a long side of the rectangle coincides with the lower base of the regular trapezoid. Figure 1 It is also shown that the corners of the combined shape 211 in the cavity rib plate 300 are all smoothly transitioned to enhance the structural performance.

[0035] Under the condition that the cavity opening 210 presents the above-mentioned combined shape 211, specifically, please refer to Figure 4 The cavity rib plate 300 includes a trapezoidal upper bottom rib plate 310, a trapezoidal left waist rib plate 320, a rectangular left short side rib plate 330, a rectangular lower long side rib plate 340, a rectangular right short side rib plate 350 and a trapezoidal right waist rib plate 360. The trapezoidal upper bottom rib plate 310 corresponds to the upper bottom of the trapezoid, the trapezoidal left waist rib plate 320 corresponds to the left waist of the trapezoid, the rectangular left short side rib plate 330 corresponds to the left short side of the rectangle, the rectangular lower long side rib plate 340 corresponds to the lower long side of the rectangle, the rectangular right short side rib plate 350 corresponds to the right short side of the rectangle, and the trapezoidal right waist rib plate 360 ​​corresponds to the right waist of the trapezoid. Figure 4 As shown, the trapezoidal upper bottom rib plate 310, the trapezoidal left waist rib plate 320, the rectangular left short side rib plate 330, the rectangular lower long side rib plate 340, the rectangular right short side rib plate 350 and the trapezoidal right waist rib plate 360 ​​are adjacent to each other in sequence and form a second hollow structure with a combined shape 211 in cross section.

[0036] In combination with the above-mentioned upper rib plate 410, lower rib plate 420, left rib plate 430 and right rib plate 440, which are respectively connected to the upper side, lower side, left side and right side of the cavity rib plate 300, and the rear end of the cavity rib plate 300 is connected to the back plate 200, when the cavity rib plate includes a trapezoidal upper bottom rib plate 310, a trapezoidal left waist rib plate 320, a rectangular left short side rib plate 330, a rectangular lower long side rib plate 340, a rectangular right short side rib plate 350 and a trapezoidal right waist rib plate 360, specifically: the trapezoidal upper bottom rib plate 310 0. The trapezoidal left waist rib plate 320 and the trapezoidal right waist rib plate 360 ​​are both connected to the upper rib plate 410, the rectangular lower long side rib plate 340 is connected to the lower side rib plate 420, the rectangular left short side rib plate 330 is connected to the left side rib plate 430, the rectangular right short side rib plate 350 is connected to the right side rib plate 440, the trapezoidal upper bottom rib plate 310, the trapezoidal left waist rib plate 320, the rectangular left short side rib plate 330, the rectangular lower long side rib plate 340, the rectangular right short side rib plate 350 and the trapezoidal right waist rib plate 360 ​​are all connected to the back plate 200.

[0037] exist Figure 1 , Figure 2 , Figure 4 and Figure 5 The upper right corner of the graphic shows the directions of up, down, left and right, which define the up and down directions and the left and right directions accordingly. In combination with the rear side where the back plate 200 is located, the front and rear directions are also defined.

[0038] In some embodiments, see Figure 5 The upper rib plate 410 includes a first upper rib plate 411, a second upper rib plate 412, a third upper rib plate 413 and a fourth upper rib plate 414. The first upper rib plate 411, the second upper rib plate 412, the third upper rib plate 413 and the fourth upper rib plate 414 are all arranged in the up and down direction. The first upper rib plate 411 is connected to the left end of the trapezoidal upper bottom rib plate 310, the second upper rib plate 412 is connected to the lower end of the trapezoidal left waist rib plate 320, the third upper rib plate 413 is connected to the lower end of the trapezoidal right waist rib plate 360, and the fourth upper rib plate 414 is connected to the right end of the trapezoidal upper bottom rib plate 310.

[0039] Please refer to Figure 5 The lower rib plate 420 includes a first lower rib plate 421, a second lower rib plate 422, a third lower rib plate 423 and a fourth lower rib plate 424. The first lower rib plate 421, the second lower rib plate 422, the third lower rib plate 423 and the fourth lower rib plate 424 are all arranged in the up and down direction. The first lower rib plate 421 is connected to the left end of the rectangular lower long side rib plate 340, the fourth lower rib plate 424 is connected to the right end of the rectangular lower long side rib plate 340, the second lower rib plate 422 and the third lower rib plate 423 are both connected to the rectangular lower long side rib plate 340, and the second lower rib plate 422 is located directly below the first upper rib plate 411, and the third lower rib plate 423 is located directly below the fourth upper rib plate 414.

[0040] Please refer to Figure 5 The left rib plate 430 includes a first left rib plate 431 and a second left rib plate 432. The right end of the first left rib plate 431 is connected to the upper end of the rectangular left short side rib plate 330, and the right end of the second left rib plate 432 is connected to the lower end of the rectangular left short side rib plate 330. Figure 5 As shown, the left end of the first left rib plate 431 is higher than the right end of the first left rib plate 431, and the second left rib plate 432 is arranged along the left-right direction.

[0041] Please refer to Figure 5 The right side rib plate 440 includes a first right rib plate 441 and a second right rib plate 442. The left end of the first right rib plate 441 is connected to the lower end of the rectangular right short side rib plate 350, and the left end of the second right rib plate 442 is connected to the upper end of the rectangular right short side rib plate 350. The first right rib plate 441 is arranged along the left and right directions, and the right end of the second right rib plate 442 is higher than the left end of the second right rib plate 442.

[0042] In some embodiments, see Figure 3 , the upper bottom of the trapezoidal hole 150 in the upper plate 110 is spaced apart from the rear side of the upper plate 110 by a first dimension a, and correspondingly, the upper bottom of the trapezoidal hole 150 in the lower plate 120 is also spaced apart from the rear side of the lower plate 120 by the first dimension a.

[0043] Please refer to Figure 4 and Figure 5 , limiting the dimensions of the cavity rib plate 300, the upper rib plate 410 and the lower rib plate 420 in the front-to-back direction to be the first dimension a, the cavity rib plate 300 involves a trapezoidal upper bottom rib plate 310, a trapezoidal left waist rib plate 320, a rectangular left short side rib plate 330, a rectangular lower long side rib plate 340, a rectangular right short side rib plate 350 and a trapezoidal right waist rib plate 360, the upper rib plate 410 involves a first upper rib plate 411, a second upper rib plate 412, a third upper rib plate 413 and a fourth upper rib plate 414, the lower rib plate 420 involves a first lower rib plate 421, a second lower rib plate 422, a third lower rib plate 423 and a fourth lower rib plate 424.

[0044] Please refer to Figure 4 and Figure 5 The size of the left end of the left rib 430 in the front-to-back direction is larger than the size of the right end of the left rib 430 in the front-to-back direction, and the size of the right end of the right rib 440 in the front-to-back direction is larger than the size of the left end of the right rib 440 in the front-to-back direction.

[0045] As described above, the structural performance is improved as much as possible by reasonably arranging the dimensions of all ribs in the front-rear direction.

[0046] In some embodiments, see Figure 4A blind avoidance hole 190 is opened on the outer side of the left plate 130, and a blind avoidance hole 190 is opened on the outer side of the right plate 140 accordingly. The left plate 130 and the right plate 140 present a symmetrical structure to each other, and the blind avoidance hole 190 is used to avoid the related components when the suspension system is connected to the left and right longitudinal beams of the frame.

[0047] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 4 There are some bolt holes 170 opened on the left plate 130 and the right plate 140 facing the back plate 200, and corresponding bolt avoidance holes 220 are opened on the back plate 200. Figure 2 As shown in the figure, the bolt avoidance holes 220 are located on the left and right sides of the back plate 200, and the bolt avoidance holes 220 are respectively arranged opposite to the corresponding bolt holes 170, thereby ensuring the smooth installation of the bolts and making the bolt holes 170 smoothly arranged at the four corners of the left plate 130 and the right plate 140, thereby ensuring the bolt connection effect of the longitudinal beam and the suspension cross beam.

[0048] In some embodiments, please refer to Figure 4 The bolt holes 170 include a first bolt hole 171 located at the rear lower corner of the left plate 130 and a second bolt hole 172 located at the rear lower corner of the right plate 140. Figure 2 The bolt avoidance hole 220 is limited to include a first bolt avoidance hole 221 and a second bolt avoidance hole 222. Please refer to Figure 2 and Figure 4 The first bolt avoidance hole 221 is directly opposite to the first bolt hole 171, and the second bolt avoidance hole 222 is directly opposite to the second bolt hole 172. In this solution, the first bolt avoidance hole 221 and the second bolt avoidance hole 222 also provide a drainage function, so that while ensuring that the strength meets the use requirements, it also has the advantage of avoiding water accumulation and corrosion.

[0049] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 5 The back plate 200 is provided with back plate weight reduction holes 230, which further reduces the weight. Specifically, the back plate weight reduction holes 230 are arranged in a relatively large area of ​​the back plate 200. Figure 5 In the figure shown, the back plate weight reduction holes 230 are shown between the second upper rib plate 412 and the first left rib plate 431, and between the second right rib plate 442 and the third upper rib plate 413. If the back plate 200 is divided into various regions by the above-mentioned rib plates, the back plate weight reduction holes 230 are distributed in the first region and the second region, the boundary of the first region is the second upper rib plate 412 and the first left rib plate 431, and the boundary of the second region is the second right rib plate 442 and the third upper rib plate 413.

[0050] The present embodiment provides an off-road vehicle chassis, including left and right longitudinal beams, the suspension cross beam is fixedly installed on the inner side of the left and right longitudinal beams by bolts, the suspension system is installed at the corresponding position on the outer side of the left and right longitudinal beams, and the upper mounting equipment is installed on the upper plate 110 of the suspension cross beam by bolts. The suspension cross beam has a compact structure and meets the rigidity requirements. By reasonably arranging the installation interface and form, the surrounding components are avoided in the spatial arrangement, and the integrated lightweight design requirements are considered. It has a simple structure, good processability, and is easy to mass produce, which is conducive to the compact layout of the off-road vehicle, and meets the design requirements of high use strength requirements and lightweight design, especially for super-heavy off-road vehicles.

[0051] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A suspension beam, characterized in that: include: An upper plate, a lower plate, a left plate and a right plate, wherein the upper plate, the left plate, the lower plate and the right plate are adjacent to each other in sequence and enclose a first hollow structure having an inverted trapezoidal cross section, wherein the upper plate and the lower plate are provided with a trapezoidal hole, and the lower bottom of the trapezoidal hole is located at the front side of the upper plate and the lower plate, and the left plate and the right plate are provided with an inferior arc hole, and the bottom edge of the inferior arc hole is located at the front side of the left plate and the right plate; A back plate, located at the rear side of the first hollow structure, the back plate is connected to the upper plate, the lower plate, the left plate, and the right plate, and a cavity opening is provided at the center of the back plate; A cavity rib plate, located in the enclosed area of ​​the first hollow structure, the cavity rib plate is arranged along the edge of the cavity opening, and the rear end of the cavity rib plate is connected to the back plate; An upper rib plate, a lower rib plate, a left rib plate and a right rib plate, wherein the upper rib plate, the lower rib plate, the left rib plate and the right rib plate are respectively connected to the upper side, the lower side, the left side and the right side of the cavity rib plate, and the upper rib plate, the lower rib plate, the left rib plate and the right rib plate are all connected to the back plate, and the upper rib plate, the lower rib plate, the left rib plate and the right rib plate are respectively connected to the upper plate, the lower plate, the left plate and the right plate; Wherein, it is defined that the suspension cross beam is manufactured by an integral molding method, and bolt holes are provided on the left plate, the right plate and the upper plate.

2. The suspension cross member according to claim 1, characterized in that The shape of the cavity opening is a combination of a regular trapezoid and a rectangle, in which a long side of the rectangle coincides with the lower bottom of the regular trapezoid, and the cavity ribs include a trapezoidal upper bottom rib, a trapezoidal left waist rib, a rectangular left short side rib, a rectangular lower long side rib, a rectangular right short side rib and a trapezoidal right waist rib, and the trapezoidal upper bottom rib, the trapezoidal left waist rib, the rectangular left short side rib, the rectangular lower long side rib, the rectangular right short side rib and the trapezoidal right waist rib are sequentially adjacent to each other and enclose a second hollow structure having a cross section of the combination shape; Among them, the trapezoidal upper bottom rib plate, the trapezoidal left waist rib plate and the trapezoidal right waist rib plate are all connected to the upper side rib plate, the rectangular lower long side rib plate is connected to the lower side rib plate, the rectangular left short side rib plate is connected to the left side rib plate, and the rectangular right short side rib plate is connected to the right side rib plate.

3. The suspension cross member according to claim 2, characterized in that The upper rib plate includes a first upper rib plate, a second upper rib plate, a third upper rib plate and a fourth upper rib plate, all of which are arranged in the up-down direction, the first upper rib plate is connected to the left end of the trapezoidal upper bottom rib plate, the second upper rib plate is connected to the lower end of the trapezoidal left waist rib plate, the third upper rib plate is connected to the lower end of the trapezoidal right waist rib plate, and the fourth upper rib plate is connected to the right end of the trapezoidal upper bottom rib plate; The lower rib plate includes a first lower rib plate, a second lower rib plate, a third lower rib plate and a fourth lower rib plate, all of which are arranged in the up-down direction, the first lower rib plate is connected to the left end of the rectangular lower long side rib plate, the fourth lower rib plate is connected to the right end of the rectangular lower long side rib plate, the second lower rib plate and the third lower rib plate are both connected to the rectangular lower long side rib plate, and the second lower rib plate and the third lower rib plate are respectively located directly below the first upper rib plate and the fourth upper rib plate; The left rib plate includes a first left rib plate and a second left rib plate, the right end of the first left rib plate is connected to the upper end of the rectangular left short side rib plate, the right end of the second left rib plate is connected to the lower end of the rectangular left short side rib plate, the left end of the first left rib plate is higher than the right end of the first left rib plate, and the second left rib plate is arranged in the left-right direction; The right side rib plate includes a first right rib plate and a second right rib plate, the left end of the first right rib plate is connected to the lower end of the rectangular right short side rib plate, the left end of the second right rib plate is connected to the upper end of the rectangular right short side rib plate, the first right rib plate is arranged along the left and right directions, and the right end of the second right rib plate is higher than the left end of the second right rib plate.

4. The suspension cross member according to claim 3, characterized in that The upper bottom of the trapezoidal hole in the upper plate is spaced apart from the rear side of the upper plate by a first dimension, and the upper bottom of the trapezoidal hole in the lower plate is also spaced apart from the rear side of the lower plate by a first dimension, so that the dimensions of the cavity rib plate, the upper rib plate and the lower rib plate in the front-to-back direction are all the first dimension; The dimension of the left end of the left rib in the front-to-back direction is greater than the dimension of the right end of the left rib in the front-to-back direction, and the dimension of the right end of the right rib in the front-to-back direction is greater than the dimension of the left end of the right rib in the front-to-back direction.

5. The suspension crossbeam according to any one of claims 1 to 4, characterized in that: An avoidance blind hole is opened on the outer side of the left plate, and an avoidance blind hole is opened on the outer side of the right plate.

6. The suspension crossbeam according to any one of claims 1 to 4, characterized in that: There are some bolt holes opened on the left plate and the right plate facing the back plate, and bolt avoidance holes are opened on the back plate. The bolt avoidance holes are located on the left and right sides of the back plate, and the bolt avoidance holes are respectively arranged facing the corresponding bolt holes.

7. The suspension cross member according to claim 6, characterized in that The bolt holes include a first bolt hole located at the rear lower corner of the left plate and a second bolt hole located at the rear lower corner of the right plate. The bolt avoidance holes include a first bolt avoidance hole directly opposite to the first bolt hole and a second bolt avoidance hole directly opposite to the second bolt hole. The first bolt avoidance hole and the second bolt avoidance hole also provide a drainage function.

8. The suspension cross member according to claim 1, characterized in that The back plate is provided with back plate weight reduction holes.

9. The suspension cross member according to claim 1, characterized in that The suspension crossbeam is made of aluminum alloy in one piece.

10. An off-road vehicle chassis, characterized in that: It comprises left and right longitudinal beams, on the inner side of which a suspension cross beam as described in any one of claims 1 to 9 is fixedly installed by bolts, a suspension system is installed at a corresponding position on the outer side of the left and right longitudinal beams, and an upper mounting device is installed on the upper plate of the suspension cross beam by bolts.

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