Frame assembly

Abstract

The invention relates to the technical field of vehicles, and particularly discloses a frame assembly which comprises a main longitudinal beam and a first cross beam group, and a first mounting hole is formed in the tail of the main longitudinal beam in the vehicle length direction; the first cross beam set comprises a first cross beam and two first fixing parts, each first fixing part comprises a first fixing plate, a first connecting part and a first supporting part, the first connecting parts and the first supporting parts are arranged on the two sides of the first fixing plates in the vehicle width direction, and the first connecting parts of the two first fixing parts are fixedly connected with the two ends of the first cross beam correspondingly; the first fixing plate is arranged in the first mounting hole, the first fixing plate is fixedly connected with the main longitudinal beam, and the first fixing piece is a casting piece. In the frame assembly, the first connecting part, the first supporting part and the first fixing plate are cast into the integrally-formed piece through the casting technology, then the connecting strength between the first connecting part and the first fixing plate and the connecting strength between the first supporting part and the first fixing plate can be improved, the problem of cracking or deformation is avoided, and the bearing capacity of the frame assembly is improved.

Description

Technical Field

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

[0002] Engineering vehicles are specialized transportation equipment for open-pit mining. Low cost, large load capacity, and high work efficiency have always been the goals pursued by customers. Among them, the load capacity and load stability of engineering vehicles are the points that customers focus on.

[0003] As an important part of engineering vehicles, the frame assembly supports the sprung mass of the entire vehicle. Therefore, the load-bearing capacity of the frame assembly is a key factor affecting the load-bearing capacity and load stability of engineering vehicles.

[0004] The existing frame assembly usually includes multiple cross beams and two main longitudinal beams. The two main longitudinal beams are arranged at intervals, and multiple cross beams are arranged between the two main longitudinal beams. The two ends of the cross beams are respectively welded or screwed to the two main longitudinal beams. Since the connection between the cross beam and the main longitudinal beam is usually a high stress area, the connection between the cross beam and the main longitudinal beam is very prone to cracking or deformation, affecting the load-bearing capacity of the frame assembly.

[0005] Therefore, a frame assembly is urgently needed to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a frame assembly to solve the problem that the two ends of the cross beam are respectively welded or screwed to the two main longitudinal beams in the related art. Since the connection between the cross beam and the main longitudinal beam is usually a high stress area, the connection between the cross beam and the main longitudinal beam is very likely to crack or deform, affecting the load-bearing capacity of the frame assembly.

[0007] The present invention provides a vehicle frame assembly, which comprises:

[0008] A main longitudinal beam, wherein two main longitudinal beams are provided, the two main longitudinal beams are spaced apart in the vehicle width direction, a first mounting hole is opened at the rear of the main longitudinal beam in the vehicle length direction, and the first mounting holes on the two main longitudinal beams are arranged opposite to each other in the vehicle width direction;

[0009] The first cross beam group includes a first cross beam and two first fixing members, wherein the first fixing member includes a first fixing plate, a first connecting portion and a first supporting portion, wherein the first connecting portion and the first supporting portion are arranged on both sides of the first fixing plate along the vehicle width direction, the first connecting portions of the two first fixing members are respectively fixedly connected to the two ends of the first cross beam, the two first fixing plates are respectively arranged in the two first mounting holes and respectively abut against the hole walls of the two first mounting holes, the two first fixing plates are respectively fixedly connected to the two main longitudinal beams, and the first fixing member is a casting.

[0010] As a preferred technical solution of the vehicle frame assembly, the first mounting hole includes a first inner mounting hole and a first outer mounting hole, the main longitudinal beam is a box beam structure, the main longitudinal beam includes an inner plate and an outer plate along the vehicle width direction, the first inner mounting hole is arranged on the inner plate, and the first outer mounting hole is arranged on the outer plate;

[0011] The first fixing plate includes a first outer fixing plate, a first inner fixing plate and a connecting tube, two ends of the connecting tube are respectively fixed to the first outer fixing plate and the first inner fixing plate, the first inner fixing plate is located in the first inner mounting hole and abuts against the hole wall of the first inner mounting hole, the first inner fixing plate is fixed to the inner plate, the first outer fixing plate is located in the first outer mounting hole and abuts against the hole wall of the first outer mounting hole, the first outer fixing plate is fixed to the outer plate, the first connecting portion is fixed to the first inner fixing plate, and the first supporting portion is fixed to the first outer fixing plate.

[0012] As a preferred technical solution for the frame assembly, the thickness of the first inner fixing plate is greater than the thickness of the inner side plate and less than the wall thickness of the first connecting portion, and the thickness of the first outer fixing plate is greater than the thickness of the outer side plate and less than the wall thickness of the first supporting portion.

[0013] As a preferred technical solution of the vehicle frame assembly, the first inner mounting hole is trapezoidal, and the first outer mounting hole is trapezoidal.

[0014] As a preferred technical solution of the frame assembly, the main longitudinal beam is provided with at least two first mounting holes spaced apart along the vehicle length direction;

[0015] At least two of the first cross beam groups are provided, and the at least two first cross beam groups are spaced apart along the vehicle length direction, and the at least two first cross beam groups correspond one-to-one to at least two of the first mounting holes on the main longitudinal beam.

[0016] As a preferred technical solution of the vehicle frame assembly, a second mounting hole is provided in the middle of the main longitudinal beam along the vehicle length direction, and the second mounting holes of the two main longitudinal beams are arranged opposite to each other along the vehicle width direction;

[0017] It also includes a second crossbeam group, which includes a second crossbeam, two second fixing members and two transition plates. The two transition plates are respectively arranged in the two second mounting holes and respectively abut against the hole walls of the second mounting holes. The two transition plates are respectively fixed to the two crossbeams. The transition plates are provided with transition holes. The two second fixing members are respectively inserted into the transition holes of the two transition plates and respectively fixed to the two transition plates. The two ends of the second crossbeam are respectively fixed to the two second fixing members.

[0018] As a preferred technical solution of the vehicle frame assembly, the second mounting hole includes a second inner mounting hole and a second outer mounting hole, the main longitudinal beam is a box beam structure, the main longitudinal beam includes an inner plate and an outer plate along the vehicle width direction, the second inner mounting hole is arranged on the inner plate, and the second outer mounting hole is arranged on the outer plate;

[0019] The transition plate includes an inner transition plate and an outer transition plate, the inner transition plate is arranged in the second inner mounting hole and fixedly connected to the inner plate, the outer transition plate is arranged in the second outer mounting hole and fixedly connected to the outer plate, the transition holes include an inner transition hole and an outer transition hole, the inner transition hole and the outer transition hole are respectively arranged in the inner transition plate and the outer transition plate.

[0020] As a preferred technical solution of the frame assembly, the second fixing member includes a tube portion and an inner connecting ring and an outer connecting ring protruding from the tube portion, the second fixing member is inserted into the transition hole, the inner connecting ring is located in the inner transition hole and abuts against the hole wall of the inner transition hole, the inner connecting ring is fixedly connected to the inner transition plate, the outer connecting ring is located in the outer transition hole and abuts against the hole wall of the outer transition hole, the outer connecting ring is fixedly connected to the outer transition plate, and the second fixing member is a casting.

[0021] As a preferred technical solution for the frame assembly, the thickness of the inner connecting ring is greater than the thickness of the inner transition plate, the thickness of the inner transition plate is greater than the thickness of the inner plate, the thickness of the outer connecting ring is greater than the thickness of the outer transition plate, and the thickness of the outer transition plate is greater than the thickness of the outer plate.

[0022] As a preferred technical solution of the vehicle frame assembly, it also includes a lifting crossbeam group, the lifting crossbeam group includes a third crossbeam and two lifting seats respectively fixed at two ends of the third crossbeam, the two lifting seats correspond to the two main longitudinal beams one by one, the lifting seat includes an inner seat plate, an outer seat plate and a connecting seat plate, the inner seat plate and the outer seat plate are arranged at intervals along the vehicle width direction, and the connecting seat plate is arranged between the inner seat plate and the outer seat plate;

[0023] The inner seat plate and the outer seat plate are respectively fixedly connected to the main longitudinal beam, and along the vehicle length direction, the contact length between the inner seat plate and the main longitudinal beam is smaller than the contact length between the outer seat plate and the main longitudinal beam, or the contact length between the inner seat plate and the main longitudinal beam is larger than the contact length between the outer seat plate and the main longitudinal beam.

[0024] As a preferred technical solution of the vehicle frame assembly, it also includes a gantry beam, the gantry beam includes a bottom beam and two side beams fixedly arranged at both ends of the bottom beam, and the two side beams are respectively provided with support grooves on the surfaces opposite to each other along the vehicle width direction;

[0025] The heads of the two main longitudinal beams along the vehicle length direction respectively pass through the two support grooves along the vehicle length direction, and the two main longitudinal beams are respectively fixedly connected to the two side beams.

[0026] As a preferred technical solution of the frame assembly, the gantry beam also includes a top crossbeam, which is plugged into the upper ends of the two side beams along the vehicle height direction, and the top crossbeam is fixedly connected to the two side beams.

[0027] As a preferred technical solution of the frame assembly, the main longitudinal beam is a box beam structure, the main longitudinal beam includes an inner plate and an outer plate along the vehicle width direction, and the main longitudinal beam includes a bottom plate and a top plate along the vehicle height direction;

[0028] The main longitudinal beam also includes a support plate, and the area of ​​the top plate close to the gantry beam extends along the vehicle width direction away from the other main longitudinal beam; the two ends of the support plate are respectively fixed to the outer side plate and the extension area of ​​the top plate along the vehicle width direction; or the area of ​​the top plate close to the gantry beam extends along the vehicle width direction toward the other main longitudinal beam; the two ends of the support plate are respectively fixed to the inner side plate and the extension area of ​​the top plate along the vehicle width direction.

[0029] The beneficial effects of the present invention are:

[0030] The present invention provides a vehicle frame assembly, which includes a main longitudinal beam and a first cross beam group, wherein two main longitudinal beams are provided, and the two main longitudinal beams are spaced apart in a vehicle width direction, and a first mounting hole is opened at a rear portion of the main longitudinal beam in a vehicle length direction, and the first mounting holes on the two main longitudinal beams are arranged opposite to each other in the vehicle width direction; the first cross beam group includes a first cross beam and two first fixing members, the first fixing member includes a first fixing plate, a first connecting portion and a first supporting portion, the first connecting portion and the first supporting portion are arranged on both sides of the first fixing plate in the vehicle width direction, the first connecting portions of the two first fixing members are respectively fixedly connected to the two ends of the first cross beam, the two first fixing plates are respectively arranged in the two first mounting holes and respectively abut against the hole walls of the two first mounting holes, the two first fixing plates are respectively fixedly connected to the two main longitudinal beams, and the first fixing member is a casting. The first connection portion in the first fixing member is fixedly connected to the first cross beam, and the first support portion in the first fixing member is used to connect the oil spring. Compared with directly fixing the first connection portion and the first support portion on the main longitudinal beam by welding or screwing, in the frame assembly, the first connection portion, the first support portion and the first fixing plate are cast into an integral part by a casting process, thereby improving the connection strength between the first connection portion and the first support portion and the first fixing plate respectively, avoiding cracking or deformation problems, and improving the load-bearing capacity of the frame assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1It is a structural schematic diagram of a vehicle frame assembly in an embodiment of the present invention;

[0032] Figure 2 An exploded schematic diagram of a vehicle frame assembly according to an embodiment of the present invention;

[0033] Figure 3 Schematic diagram of the structure of the main longitudinal beam and the secondary longitudinal beam in an embodiment of the present invention;

[0034] Figure 4 The structure of the first beam group in the embodiment of the present invention is schematically shown in FIG. Figure 1 ;

[0035] Figure 5 The structure of the first beam group in the embodiment of the present invention is schematically shown in FIG. Figure 2 ;

[0036] Figure 6 The structure of the second beam group in the embodiment of the present invention is schematically shown. Figure 1 ;

[0037] Figure 7 The structure of the second beam group in the embodiment of the present invention is schematically shown. Figure 2 ;

[0038] Figure 8 It is a structural schematic diagram of a lifting beam assembly in an embodiment of the present invention;

[0039] Fig. 9 The structure of the gantry beam in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0040] Fig.10 The structure of the gantry beam in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0041] Fig.11 for Fig.10 A partial enlarged view of the AA point in the middle.

[0042] In the figure:

[0043] X, vehicle length direction; Y, vehicle width direction; Z, vehicle height direction;

[0044] 1. Main longitudinal beam; 11. Inner plate; 12. Outer plate; 13. Bottom plate; 14. Top plate; 15. Support plate; 16. First mounting hole; 161. First inner mounting hole; 162. First outer mounting hole; 17. Second mounting hole; 171. Second inner mounting hole; 172. Second outer mounting hole;

[0045] 2. first beam group; 21. first beam; 22. first fixing member; 221. first fixing plate; 2211. first outer fixing plate; 2212. first inner fixing plate; 2213. connecting pipe; 222. first connecting part; 223. first supporting part;

[0046] 3. Second crossbeam group; 31. Second crossbeam; 32. Second fixing member; 321. Pipe; 322. Inner connecting ring; 323. Outer connecting ring; 33. Transition plate; 331. Inner transition plate; 332. Outer transition plate; 333. Transition hole; 3331. Inner transition hole; 3332. Outer transition hole;

[0047] 4. Lifting beam assembly; 41. Third beam; 42. Lifting seat; 421. Inner seat plate; 422. Outer seat plate; 423. Connecting seat plate;

[0048] 5. Gantry beam; 51. Bottom beam; 52. Side beam; 521. Support groove; 53. Top cross beam; 54. Reinforcement rib plate; 55. Angle plate;

[0049] 6. Secondary longitudinal beam. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0054] like Figure 1 to Figure 11 As shown, the present embodiment provides a vehicle frame assembly, which includes a main longitudinal beam 1 and a first cross beam group 2. Two main longitudinal beams 1 are provided, and the two main longitudinal beams 1 are spaced apart along the vehicle width direction Y. The tail of the main longitudinal beam 1 along the vehicle length direction X is provided with a first mounting hole 16, and the first mounting holes 16 on the two main longitudinal beams 1 are arranged opposite to each other along the vehicle width direction Y; the first cross beam group 2 includes a first cross beam 21 and two first fixing members 22, the first fixing member 22 includes a first fixing plate 221, a first connecting portion 222 and a first supporting portion 223, the first connecting portion 222 and the first supporting portion 223 are arranged on both sides of the first fixing plate 221 along the vehicle width direction Y, the first connecting portions 222 of the two first fixing members 22 are respectively fixedly connected to the two ends of the first cross beam 21, the two first fixing plates 221 are respectively arranged in the two first mounting holes 16 and respectively abut against the hole walls of the two first mounting holes 16, the two first fixing plates 221 are respectively fixedly connected to the two main longitudinal beams 1, and the first fixing member 22 is a casting. The first connection portion 222 in the first fixing member 22 is fixedly connected to the first cross beam 21, and the first support portion 223 in the first fixing member 22 is used to connect the oil spring. Compared with directly fixing the first connection portion 222 and the first support portion 223 on the main longitudinal beam 1 by welding or screwing, in the frame assembly, the first connection portion 222, the first support portion 223 and the first fixing plate 221 are cast into an integral part by a casting process, thereby improving the connection strength between the first connection portion 222 and the first support portion 223 and the first fixing plate 221 respectively, avoiding cracking or deformation problems, and improving the bearing capacity of the frame assembly.

[0055] Specifically, the first fixing plate 221 and the main longitudinal beam 1 are fixed by welding.

[0056] Optionally, a reinforcing rib is disposed between the first supporting portion 223 and the first fixing plate 221 , so as to further enhance the connection strength between the first supporting portion 223 and the first fixing plate 221 .

[0057] Optionally, the first connection portion 222 is a circular tube structure, the first cross beam 21 is a circular tube structure, the first connection portion 222 is partially inserted into the first cross beam 21 , and the first connection portion 222 and the first cross beam 21 are welded and fixed.

[0058] like Figure 3-Figure 5 As shown, optionally, the main longitudinal beam 1 includes an inner plate 11 and an outer plate 12 along the vehicle width direction Y, and includes a bottom plate 13 and a top plate 14 along the vehicle height direction Z. The inner plate 11, the outer plate 12, the bottom plate 13 and the top plate 14 are surrounded to form a box beam structure. The first mounting hole 16 includes a first inner mounting hole 161 and a first outer mounting hole 162. The inner plate 11 is provided with the first inner mounting hole 161, and the outer plate 12 is provided with the first outer mounting hole 162. The first fixing plate 221 includes a first outer fixing plate 2211, a first inner fixing plate 2212 and a connecting pipe 2213. The connecting pipe The two ends of 2213 are respectively fixed to the first outer fixing plate 2211 and the first inner fixing plate 2212, the first inner fixing plate 2212 is located in the first inner mounting hole 161 and abuts against the hole wall of the first inner mounting hole 161, the first inner fixing plate 2212 is fixed to the inner plate 11, the first outer fixing plate 2211 is located in the first outer mounting hole 162 and abuts against the hole wall of the first outer mounting hole 162, the first outer fixing plate 2211 is fixed to the outer plate 12, the first connecting portion 222 is fixed to the first inner fixing plate 2212, and the first supporting portion 223 is fixed to the first outer fixing plate 2211. In this embodiment, the first inner fixing plate 2212 is located in the first inner mounting hole 161, and the peripheral wall of the first inner fixing plate 2212 forms a groove with the hole wall of the first inner mounting hole 161. The groove formed between the first inner fixing plate 2212 and the inner plate 11 is welded by welding. This setting can increase the weld width between the first inner fixing plate 2212 and the inner plate 11, thereby improving the connection strength between the first inner fixing plate 2212 and the inner plate 11. Specifically, the peripheral wall of the first inner fixing plate 2212 abuts against the hole wall of the first inner mounting hole 161, thereby avoiding the problem of reduced strength of the inner plate 11 due to the provision of the first inner mounting hole 161.

[0059] Optionally, the first outer fixing plate 2211 is located in the first outer mounting hole 162, and the peripheral wall of the first outer fixing plate 2211 forms a groove with the hole wall of the first outer mounting hole 162, and the groove formed between the first outer fixing plate 2211 and the outer plate 12 is welded by welding. This setting can increase the weld width between the first outer fixing plate 2211 and the outer plate 12, thereby improving the connection strength between the first outer fixing plate 2211 and the outer plate 12. Specifically, the peripheral wall of the first outer fixing plate 2211 abuts against the hole wall of the first outer mounting hole 162, thereby avoiding the problem of reduced strength of the outer plate 12 due to the provision of the first outer mounting hole 162.

[0060] Optionally, the thickness of the first inner fixing plate 2212 is greater than the thickness of the inner plate 11 and less than the wall thickness of the first connecting portion 222, and the thickness of the first outer fixing plate 2211 is greater than the thickness of the outer plate 12 and less than the wall thickness of the first supporting portion 223. In this embodiment, the thickness of the first connecting portion 222 is a, the thickness of the first inner fixing plate 2212 is b, and the thickness of the inner plate 11 is c, a>b>c. Compared with the direct transition from the first connecting portion 222 to the inner plate 11, the first inner fixing plate 2212 is added between the first connecting portion 222 and the inner plate 11 in this embodiment, so that the thickness change is more gentle, thereby alleviating the influence of stress at the thickness change position. The strength of the frame assembly is effectively improved.

[0061] The thickness of the first support portion 223 is d, the thickness of the first outer fixing plate 2211 is e, and the thickness of the outer side plate 12 is f, d>e>f. Compared with the direct transition from the first support portion 223 to the outer side plate 12, the first outer fixing plate 2211 is added between the first support portion 223 and the outer side plate 12 in this embodiment, so that the thickness change is more gentle, thereby alleviating the influence of stress at the thickness change position, and effectively improving the strength of the frame assembly.

[0062] Optionally, the first inner mounting hole 161 is trapezoidal, and the first outer mounting hole 162 is trapezoidal. In this embodiment, the first inner fixing plate 2212 corresponding to the first inner mounting hole 161 is trapezoidal, and the first outer fixing plate 2211 corresponding to the first outer mounting hole 162 is trapezoidal. Specifically, the length of the bottom wall of the first inner mounting hole 161 close to the bottom plate 13 is greater than the length of the top wall close to the top plate 14, and this setting can improve the supporting capacity of the main longitudinal beam 1 corresponding to the first inner fixing plate 2212 to the first inner fixing plate 2212; the length of the bottom wall of the first outer mounting hole 162 close to the bottom plate 13 is greater than the length of the top wall close to the top plate 14, and this setting can improve the supporting capacity of the main longitudinal beam 1 corresponding to the first outer fixing plate 2211 to the first outer fixing plate 2211.

[0063] Optionally, the main longitudinal beam 1 is provided with at least two first mounting holes 16 at intervals along the vehicle length direction X; the first cross beam group 2 is provided with at least two, at least two first cross beam groups 2 are arranged at intervals along the vehicle length direction X, and the at least two first cross beam groups 2 correspond one to one with the at least two first mounting holes 16 on the main longitudinal beam 1. In this embodiment, the at least two first cross beam groups 2 are used to assemble with the rear axle to support the entire rear axle.

[0064] like Figure 3 , Figure 6 and Figure 7 As shown, optionally, the main longitudinal beam 1 is provided with a second mounting hole 17 in the middle part along the vehicle length direction X, and the second mounting holes 17 of the two main longitudinal beams 1 are arranged oppositely along the vehicle width direction Y; the frame assembly also includes a second cross beam group 3, the second cross beam group 3 includes a second cross beam 31, two second fixing members 32 and two transition plates 33, the two transition plates 33 are respectively arranged in the two second mounting holes 17 and respectively abut against the hole walls of the second mounting holes 17, the two transition plates 33 are respectively fixed to the two cross beams, the transition plates 33 are provided with transition holes 333, the two second fixing members 32 are respectively inserted into the transition holes 333 of the two transition plates 33 and respectively fixed to the two transition plates 33, and the two ends of the second cross beam 31 are respectively fixed to the two second fixing members 32. In this embodiment, the transition plate 33 and the main longitudinal beam 1 are welded and fixed by a groove welding process, and the transition plate 33 and the second fixing member 32 are fixed by a groove welding process. Since the second cross beam group 3 is arranged in the middle of the main longitudinal beam 1 along the vehicle length direction X, the second cross beam group 3 only serves to fix the two main longitudinal beams 1, so the force applied to the second cross beam group 3 is smaller than that applied to the first cross beam group 2. Therefore, in order to reduce the manufacturing cost, the second fixing member 32 and the transition plate 33 can be manufactured separately.

[0065] Optionally, the second mounting hole 17 is a rectangular hole, and the transition plate 33 is a rectangular hole adapted to the second mounting hole 17 .

[0066] Optionally, the second mounting hole 17 includes a second inner mounting hole 171 and a second outer mounting hole 172, the inner plate 11 is provided with the second inner mounting hole 171, and the outer plate 12 is provided with the second outer mounting hole 172; the transition plate 33 includes an inner transition plate 331 and an outer transition plate 332, the inner transition plate 331 is provided at the second inner mounting hole 171 and is fixedly connected to the inner plate 11, the outer transition plate 332 is provided at the second outer mounting hole 172 and is fixedly connected to the outer plate 12, the transition hole 333 includes an inner transition hole 3331 and an outer transition hole 3332, the inner transition hole 3331 and the outer transition hole 3332 are respectively provided at the inner transition plate 331 and the outer transition plate 332 and are coaxially provided. In this embodiment, the second fixing member 32 is provided through the corresponding inner transition hole 3331 and the outer transition hole 3332 and is respectively fixedly connected to the inner transition plate 331 and the outer transition plate 332. The inner transition plate 331 is arranged in the second inner mounting hole 171 and fixedly connected to the inner plate 11, and the outer transition plate 332 is arranged in the second outer mounting hole 172 and fixedly connected to the outer plate 12. This arrangement can improve the overall strength of the transition plate 33 and prevent the relative position between the second fixing member 32 and the corresponding main longitudinal beam 1 from changing.

[0067] Optionally, the second fixing member 32 includes a tube portion 321 and an inner connecting ring 322 and an outer connecting ring 323 protruding from the tube portion 321. The second fixing member 32 is inserted into the transition hole 333. The inner connecting ring 322 is located in the inner transition hole 3331 and abuts against the hole wall of the inner transition hole 3331. The inner connecting ring 322 is fixedly connected to the inner transition plate 331. The outer connecting ring 323 is located in the outer transition hole 3332 and abuts against the hole wall of the outer transition hole 3332. The outer connecting ring 323 is fixedly connected to the outer transition plate 332. The second fixing member 32 is a casting. In this embodiment, compared with directly fixing the tube portion 321 to the transition plate 33, the first fixing member 22 also includes an inner connecting ring 322 and an outer connecting ring 323 protruding from the tube portion 321, and the inner connecting ring 322 and the outer connecting ring 323 are fixed to the inner transition plate 331 and the outer transition plate 332 respectively, so that the area of ​​the first fixing member 22 with the greatest force is concentrated in the connection area between the inner connecting ring 322 and the tube portion 321 and the connection area between the outer connecting ring 323 and the tube portion 321. Since the first fixing member 22 is an integrally formed casting, the connection strength between the main longitudinal beam 1 and the second cross beam 31 can be improved.

[0068] Optionally, a chamfer is provided at a connection between the inner connecting ring 322 and the tube portion 321 , and a chamfer is provided at a connection between the outer connecting ring 323 and the tube portion 321 .

[0069] Optionally, the thickness of the inner connecting ring 322 is greater than the thickness of the inner transition plate 331, the thickness of the inner transition plate 331 is greater than the thickness of the inner plate 11, the thickness of the outer connecting ring 323 is greater than the thickness of the outer transition plate 332, and the thickness of the outer transition plate 332 is greater than the thickness of the outer plate 12. In this embodiment, the thickness of the inner connecting ring 322 is A, the thickness of the inner transition plate 331 is B, and the thickness of the inner plate 11 is c, A>B>c, compared with directly fixing the inner connecting ring 322 to the inner plate 11, this setting makes the thickness change more gentle and avoids the problem of stress concentration.

[0070] like Figure 8 As shown, optionally, the frame assembly also includes a lifting beam group 4, the lifting beam group 4 includes a third beam 41 and two lifting seats 42 respectively fixed at both ends of the third beam 41, the two lifting seats 42 correspond to the two main longitudinal beams 1 one by one, the lifting seat 42 includes an inner seat plate 421, an outer seat plate 422 and a connecting seat plate 423, the inner seat plate 421 and the outer seat plate 422 are arranged at intervals along the vehicle width direction Y, and the connecting seat plate 423 is arranged between the inner seat plate 421 and the outer seat plate 422; the inner seat plate 421 and the outer seat plate 422 are respectively fixed to the main longitudinal beam 1, and along the vehicle length direction X, the abutment length of the inner seat plate 421 and the main longitudinal beam 1 is less than the abutment length of the outer seat plate 422 and the main longitudinal beam 1, or the abutment length of the inner seat plate 421 and the main longitudinal beam 1 is greater than the abutment length of the outer seat plate 422 and the main longitudinal beam 1. In this embodiment, the abutting position of the inner seat plate 421 and the main longitudinal beam 1 is welded, and the abutting position of the outer seat plate 422 and the main longitudinal beam 1 is welded. Taking the abutting length of the inner seat plate 421 and the main longitudinal beam 1 as an example, which is shorter than the abutting length of the outer seat plate 422 and the main longitudinal beam 1, the surface of the inner plate 11 abutting the main longitudinal beam 1 along the vehicle length direction X is the inner abutting surface, and the surface of the outer plate 12 abutting the main longitudinal beam 1 along the vehicle length direction X is the outer abutting surface. The two ends of the inner abutting surface are not in a straight line with the two ends of the outer abutting surface along the vehicle width direction Y. Therefore, this setting can increase the maximum supporting force of the main longitudinal beam 1 on the lifting seat 42.

[0071] like Figure 9-11As shown, the gantry beam 5 not only bears the weight of the engine, but also supports the front axle. Therefore, the stability of the connection between the gantry beam 5 and the main longitudinal beam 1 is extremely important. Optionally, the frame assembly also includes a gantry beam 5, which includes a bottom beam 51 and two side beams 52 fixed at both ends of the bottom beam 51. The two side beams 52 are respectively provided with support grooves 521 on the opposite surfaces along the vehicle width direction Y; the heads of the two main longitudinal beams 1 along the vehicle length direction X pass through the two support grooves 521 respectively along the vehicle length direction X, and the two main longitudinal beams 1 are respectively fixed to the two side beams 52. In this embodiment, the opening direction of the support groove 521 is set along the vehicle width direction Y, and the two main longitudinal beams 1 are embedded in the two support grooves 521, thereby improving the stability of the connection between the two side beams 52 and the two main longitudinal beams 1.

[0072] Optionally, the gantry beam 5 further includes a plurality of angle plates 55 , which are disposed between the main longitudinal beam 1 and the side beam 52 and are fixedly connected to the main longitudinal beam 1 and the side beam 52 , respectively.

[0073] Optionally, the two side beams 52 and the bottom beam 51 of the gantry beam 5 are arranged in a U shape, wherein the two bending areas of the gantry beam 5 are both located on the two side beams 52, and the stress concentration areas of the gantry beam 5 are also in the two bending areas. This arrangement avoids the two connection positions of the two side beams 52 and the bottom beam 51 from overlapping with the two bending areas, thereby improving the strength of the gantry beam 5.

[0074] Optionally, the gantry beam 5 further includes a top crossbeam 53, which is plugged into the upper ends of the two side beams 52 along the vehicle height direction Z, and the top crossbeam 53 is fixedly connected to the two side beams 52. In this embodiment, the top crossbeam 53 is a box beam structure, and a plurality of reinforcing ribs 54 are arranged inside to improve the overall bearing capacity and the strength of the crossbeam. The top crossbeam 53 is plugged into the upper ends of the two side beams 52 along the vehicle height direction Z, and the top crossbeam 53 is fixedly connected to the two side beams 52. This arrangement improves the strength of the gantry beam 5 and prevents the gantry beam 5 from being deformed.

[0075] Optionally, the bottom beam 51 and the side beam 52 are both box beam structures. In order to further improve the strength of the bottom beam 51 and the side beam 52, reinforcing rib plates 54 are arranged in the bottom beam 51 and the side beam 52. This arrangement improves the strength of the gantry beam 5 while reducing the overall weight of the gantry beam 5.

[0076] Optionally, the main longitudinal beam 1 further includes a support plate 15, the area of ​​the top plate 14 near the gantry beam 5 extends away from another main longitudinal beam 1 along the vehicle width direction Y; the two ends of the support plate 15 are respectively fixed to the extension area of ​​the outer side plate 12 and the top plate 14 along the vehicle width direction Y; or the area of ​​the top plate 14 near the gantry beam 5 extends near another main longitudinal beam 1 along the vehicle width direction Y; the two ends of the support plate 15 are respectively fixed to the inner side plate 11 and the extension area of ​​the top plate 14 along the vehicle width direction Y. In this embodiment, in the frame assembly, the main longitudinal beam 1 near the gantry beam 5 area has a large load. In order to avoid deformation of the main longitudinal beam 1 in this area, the top plate 14 of the main longitudinal beam 1 is extended along the vehicle width direction Y, so that the support plate 15 plays a supporting role on the top plate 14 to improve the bearing capacity of the main longitudinal beam 1. Specifically, the support plate 15 is a wedge-shaped plate. The two adjacent side walls of the support plate 15 are respectively fitted with the extension area of ​​the top plate 14 and the corresponding inner side plate 11 or outer side plate 12.

[0077] Optionally, the frame assembly further includes a secondary longitudinal beam 6 , and the secondary longitudinal beam 6 and the main longitudinal beam 1 are respectively located on both sides of the gantry beam 5 along the vehicle length direction X.

[0078] Optionally, the secondary longitudinal beam 6 and the main longitudinal beam 1 are fixedly connected to each other.

[0079] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A frame assembly, characterized in that: include: A main longitudinal beam (1), wherein two main longitudinal beams (1) are provided, the two main longitudinal beams (1) are arranged at intervals along a vehicle width direction (Y), a first mounting hole (16) is opened at a rear portion of the main longitudinal beam (1) along a vehicle length direction (X), and the first mounting holes (16) on the two main longitudinal beams (1) are arranged opposite to each other along the vehicle width direction (Y); A first crossbeam group (2) comprises a first crossbeam (21) and two first fixing members (22), wherein the first fixing member (22) comprises a first fixing plate (221), a first connecting portion (222) and a first supporting portion (223), wherein the first connecting portion (222) and the first supporting portion (223) are arranged on both sides of the first fixing plate (221) along the vehicle width direction (Y), the first connecting portions (222) of the two first fixing members (22) are respectively fixedly connected to two ends of the first crossbeam (21), the two first fixing plates (221) are respectively arranged in the two first mounting holes (16) and respectively abut against the hole walls of the two first mounting holes (16), the two first fixing plates (221) are respectively fixedly connected to the two main longitudinal beams (1), and the first fixing member (22) is a casting.

2. The frame assembly according to claim 1, characterized in that: The first mounting hole (16) comprises a first inner mounting hole (161) and a first outer mounting hole (162); the main longitudinal beam (1) is a box beam structure; the main longitudinal beam (1) comprises an inner plate (11) and an outer plate (12) along the vehicle width direction (Y); the first inner mounting hole (161) is arranged on the inner plate (11), and the first outer mounting hole (162) is arranged on the outer plate (12); The first fixing plate (221) comprises a first outer fixing plate (2211), a first inner fixing plate (2212) and a connecting tube (2213); two ends of the connecting tube (2213) are respectively fixed to the first outer fixing plate (2211) and the first inner fixing plate (2212); the first inner fixing plate (2212) is located in the first inner mounting hole (161) and abuts against the hole wall of the first inner mounting hole (161); the first inner fixing plate (2212) is fixed to the inner plate (11); the first outer fixing plate (2211) is located in the first outer mounting hole (162) and abuts against the hole wall of the first outer mounting hole (162); the first outer fixing plate (2211) is fixed to the outer plate (12); the first connecting portion (222) is fixed to the first inner fixing plate (2212); and the first supporting portion (223) is fixed to the first outer fixing plate (2211).

3. The frame assembly according to claim 2, characterized in that: The thickness of the first inner fixing plate (2212) is greater than the thickness of the inner plate (11) and less than the wall thickness of the first connecting portion (222), and the thickness of the first outer fixing plate (2211) is greater than the thickness of the outer plate (12) and less than the wall thickness of the first supporting portion (223).

4. The frame assembly according to claim 2, characterized in that: The first inner mounting hole (161) is trapezoidal, and the first outer mounting hole (162) is trapezoidal.

5. The vehicle frame assembly according to any one of claims 1 to 4, characterized in that: The main longitudinal beam (1) is provided with at least two first mounting holes (16) spaced apart along the vehicle length direction (X); At least two of the first cross beam groups (2) are provided, the at least two first cross beam groups (2) are arranged at intervals along the vehicle length direction (X), and the at least two first cross beam groups (2) correspond one-to-one to at least two first mounting holes (16) on the main longitudinal beam (1).

6. The vehicle frame assembly according to claim 1, characterized in that: A second mounting hole (17) is provided in the middle of the main longitudinal beam (1) along the vehicle length direction (X), and the second mounting holes (17) of the two main longitudinal beams (1) are arranged opposite to each other along the vehicle width direction (Y); The invention also comprises a second crossbeam group (3), wherein the second crossbeam group (3) comprises a second crossbeam (31), two second fixing members (32) and two transition plates (33), wherein the two transition plates (33) are respectively arranged in the two second mounting holes (17) and respectively abut against the hole walls of the second mounting holes (17), the two transition plates (33) are respectively fixedly connected to the two main longitudinal beams (1), the transition plates (33) are provided with transition holes (333), the two second fixing members (32) are respectively inserted into the transition holes (333) of the two transition plates (33) and respectively fixedly connected to the two transition plates (33), and the two ends of the second crossbeam (31) are respectively fixedly connected to the two second fixing members (32).

7. The vehicle frame assembly according to claim 6, characterized in that: The second mounting hole (17) comprises a second inner mounting hole (171) and a second outer mounting hole (172); the main longitudinal beam (1) is a box beam structure; the main longitudinal beam (1) comprises an inner plate (11) and an outer plate (12) along the vehicle width direction (Y); the second inner mounting hole (171) is arranged on the inner plate (11), and the second outer mounting hole (172) is arranged on the outer plate (12); The transition plate (33) comprises an inner transition plate (331) and an outer transition plate (332); the inner transition plate (331) is arranged in the second inner mounting hole (171) and is fixedly connected to the inner plate (11); the outer transition plate (332) is arranged in the second outer mounting hole (172) and is fixedly connected to the outer plate (12); the transition hole (333) comprises an inner transition hole (3331) and an outer transition hole (3332); the inner transition hole (3331) and the outer transition hole (3332) are respectively arranged in the inner transition plate (331) and the outer transition plate (332).

8. The vehicle frame assembly according to claim 7, characterized in that: The second fixing member (32) comprises a tube portion (321) and an inner connecting ring (322) and an outer connecting ring (323) protruding from the tube portion (321); the second fixing member (32) is inserted into the transition hole (333); the inner connecting ring (322) is located in the inner transition hole (3331) and abuts against the hole wall of the inner transition hole (3331); the inner connecting ring (322) is fixedly connected to the inner transition plate (331); the outer connecting ring (323) is located in the outer transition hole (3332) and abuts against the hole wall of the outer transition hole (3332); the outer connecting ring (323) is fixedly connected to the outer transition plate (332); and the second fixing member (32) is a casting.

9. The vehicle frame assembly according to claim 8, characterized in that: The thickness of the inner connecting ring (322) is greater than the thickness of the inner transition plate (331), the thickness of the inner transition plate (331) is greater than the thickness of the inner plate (11), the thickness of the outer connecting ring (323) is greater than the thickness of the outer transition plate (332), and the thickness of the outer transition plate (332) is greater than the thickness of the outer plate (12).

10. The vehicle frame assembly according to claim 1, characterized in that: The vehicle further comprises a lifting beam group (4), the lifting beam group (4) comprising a third beam (41) and two lifting seats (42) respectively fixed at two ends of the third beam (41), the two lifting seats (42) corresponding to the two main longitudinal beams (1) one by one, the lifting seats (42) comprising an inner seat plate (421), an outer seat plate (422) and a connecting seat plate (423), the inner seat plate (421) and the outer seat plate (422) being arranged at intervals along the vehicle width direction (Y), and the connecting seat plate (423) being arranged between the inner seat plate (421) and the outer seat plate (422); The inner seat plate (421) and the outer seat plate (422) are respectively fixedly connected to the main longitudinal beam (1), and along the vehicle length direction (X), the contact length between the inner seat plate (421) and the main longitudinal beam (1) is smaller than the contact length between the outer seat plate (422) and the main longitudinal beam (1), or the contact length between the inner seat plate (421) and the main longitudinal beam (1) is larger than the contact length between the outer seat plate (422) and the main longitudinal beam (1).

11. The vehicle frame assembly according to claim 1, characterized in that: It also comprises a gantry beam (5), the gantry beam (5) comprising a bottom beam (51) and two side beams (52) fixedly arranged at two ends of the bottom beam (51), and the two side beams (52) are respectively provided with support grooves (521) on surfaces opposite to each other along the vehicle width direction (Y); The heads of the two main longitudinal beams (1) along the vehicle length direction (X) are respectively inserted into the two support grooves (521) along the vehicle length direction (X), and the two main longitudinal beams (1) are respectively fixedly connected to the two side beams (52).

12. The vehicle frame assembly according to claim 11, characterized in that: The gantry beam (5) further comprises a top cross beam (53), wherein the top cross beam (53) is plugged into the upper ends of the two side beams (52) along the vehicle height direction (Z), and the top cross beam (53) is fixedly connected to the two side beams (52).

13. The vehicle frame assembly according to claim 11, characterized in that: The main longitudinal beam (1) is a box beam structure, the main longitudinal beam (1) comprises an inner plate (11) and an outer plate (12) along the vehicle width direction (Y), and the main longitudinal beam (1) comprises a bottom plate (13) and a top plate (14) along the vehicle height direction (Z); The main longitudinal beam (1) further comprises a support plate (15); a region of the top plate (14) close to the gantry beam (5) extends away from another main longitudinal beam (1) along the vehicle width direction (Y); two ends of the support plate (15) are respectively fixedly connected to the outer side plate (12) and the extension region of the top plate (14) along the vehicle width direction (Y); or a region of the top plate (14) close to the gantry beam (5) extends close to another main longitudinal beam (1) along the vehicle width direction (Y); two ends of the support plate (15) are respectively fixedly connected to the inner side plate (11) and the extension region of the top plate (14) along the vehicle width direction (Y).

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