A frame structure suitable for transport vehicles

Abstract

The present invention discloses a frame structure suitable for a transport vehicle, comprising a longitudinal beam, a front beam and a tail beam, the longitudinal beam comprising a left longitudinal beam and a right longitudinal beam arranged opposite to each other, a plurality of cross beams are arranged between the left longitudinal beam and the right longitudinal beam for welding, support legs are arranged on the outer sides of the left and right longitudinal beams, and a support beam is arranged at a position corresponding to the support legs between the left and right longitudinal beams; a shaft sleeve is arranged at the welded end of the cross beam, on which an upper lug of an oil and gas spring can be installed, and there is no need to separately arrange a mounting seat for the upper lug of the oil and gas spring, thereby saving installation space; the steering vertical shaft is welded and fixed together with the support leg, thereby saving installation space of a traditional steering swing arm support; an inverted "U"-shaped groove is arranged in the support beam to provide a movement space for the transmission shaft, and the reinforcing beam at the inverted "U"-shaped groove is detachable, thereby facilitating the maintenance of the transmission shaft. The various parts of the frame structure described in the present invention are reasonably arranged, the space is fully utilized, the bearing capacity is strong, and the good performance of the transport vehicle can be guaranteed.

Description

[Technical field]

[0001] The invention relates to the technical field of automobile manufacturing, and in particular to a frame structure suitable for a transport vehicle. [Background technology]

[0002] As an important part of the vehicle chassis, the frame structure is an integrated platform for the vehicle, providing mechanical, electrical, and pneumatic interfaces for various related systems of special vehicles. In addition to bearing the large loads during the use of the chassis, the frame also has to bear various dynamic loads and various additional loads generated during the driving of the vehicle. The quality of its structural design will have an important impact on the reliability and safety of the chassis structure of the entire vehicle.

[0003] Transport vehicles have higher requirements for the frame, requiring both high load-bearing capacity and good stability and passability; traditional transport vehicles usually adopt traditional "Z" type, "C" type and The longitudinal beam structure is in the form of a letter "Y", and the integral cross beam is inserted between the longitudinal beams, and the entire frame is formed by riveting, screwing or welding, providing a solid support for the good driving performance of the whole vehicle. However, the cross beam section in the traditional frame structure is large, resulting in a relatively small internal space, and the installation of the transmission shaft, steering arm support, suspension upper lug support, etc. required by the transport vehicle takes up a large space and has poor maintainability. [Summary of the invention]

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a frame structure suitable for transport vehicles, which has high bearing capacity, stability and passability, and solves the problems of traditional frames such as the drive shaft, steering arm support, suspension upper lug support, etc. occupying space during installation, being difficult to assemble and disassemble, and having poor maintainability due to limited space.

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

[0006] A frame structure suitable for a transport vehicle comprises a longitudinal beam, a front beam connected to the front end of the longitudinal beam and a tail beam connected to the rear end of the longitudinal beam, the longitudinal beam comprising a left longitudinal beam and a right longitudinal beam arranged opposite to each other, a plurality of cross beam welds are arranged between the left longitudinal beam and the right longitudinal beam; the cross beam welds comprise a horizontally arranged cover plate, a bottom plate and a cross beam upright plate connected between the cover plate and the bottom plate, a connecting plate is respectively connected to the lower left and lower right of the cross beam upright plate, the connecting plate is arranged in an inverted "L" structure, and is respectively connected to the left longitudinal beam and the right longitudinal beam; the cross beam upright plate comprises two cross beam upright plates I and II arranged in sequence, a shaft sleeve is respectively arranged at the left and right ends of the two cross beam upright plates I for connecting to the upper support ears of the suspension.

[0007] Preferably, a cross beam upright plate III is respectively arranged on the left and right sides between the cross beam upright plate I and the cross beam upright plate II; a reinforcing plate I perpendicular to the cross beam upright plate I is arranged between the two cross beam upright plates I, and a reinforcing plate II perpendicular to the cross beam upright plate I and the cross beam upright plate II is arranged between the cross beam upright plate I and the cross beam upright plate II; a reinforcing plate III is respectively connected to the left and right ends of the opposite side of the two cross beam upright plates I.

[0008] Preferably, the left and right ends of the cross beam upright plates II and III are respectively inclined, and a suspension limit seat fixing plate is connected at the ends thereof to ensure the bearing capacity of the cross beam upright plates while playing the role of suspension upward jump limit.

[0009] Preferably, the left longitudinal beam and the right longitudinal beam both adopt a "Z" type structure.

[0010] Preferably, the number of welded cross beams is equal to the number of axles, and the cross beams are respectively arranged above each axle.

[0011] Preferably, a vertical support plate is fixedly arranged at both ends of the right side length direction of the cross beam upright plate in the cross beam welding located at a bridge, and the bottom of the vertical support plate is fixedly connected to the outer edges of the left and right longitudinal beams respectively; the right side of the suspension limit seat fixing plate extends to be flush with the end of the vertical support plate, and the right end of the cross beam cover plate also extends to the top of the vertical support plate and the suspension limit seat fixing plate, providing an installation platform for the rear suspension of the cab.

[0012] Preferably, in order to strengthen the strength of the left and right longitudinal beams at a bridge, a longitudinal beam reinforcement support is respectively arranged at the left and right longitudinal beams above a bridge, including an L-shaped reinforcement connecting plate fixedly connected to the bending parts above the left and right longitudinal beams and a reinforcement rib plate arranged on the side of the L-shaped reinforcement connecting plate, the L-shaped reinforcement connecting plate includes a vertical part and a horizontal part, the vertical part is respectively fixedly connected to the left and right longitudinal beams, and the horizontal part is fixedly connected to the connection plate in the cross beam welding.

[0013] Preferably, the outer sides of the left longitudinal beam and the right longitudinal beam are respectively provided with support legs perpendicular thereto, and the support legs include a first support leg located between the first bridge and the second bridge and a second support leg located between the fourth bridge and the tail beam, and the first support leg and the second support leg both include a horizontally arranged support leg cover plate, a support leg bottom plate and a support leg vertical plate connected between the support leg cover plate and the support leg bottom plate; the first support leg and the second support leg are connected to a jack connecting seat at one end away from the left and right longitudinal beams.

[0014] Preferably, a support leg reinforcement plate I is vertically arranged on one side of the inner side of the support leg upright plate of the first support leg and the second support leg close to the jack connecting seat, and a support leg reinforcement rib is also horizontally arranged between the two support leg upright plates. The support leg reinforcement rib is arranged as an elliptical ring structure and its two ends are respectively fixedly connected to the support leg upright plates.

[0015] Preferably, a steering vertical shaft is arranged on a side of the first supporting leg away from the jack connecting seat, and the steering vertical shaft passes through the supporting leg bottom plate and the supporting leg cover plate from bottom to top and is respectively welded and fixed thereto.

[0016] Preferably, a steering reinforcement plate is fixedly provided on the top of the support leg cover plate and the bottom of the support seat bottom plate at positions corresponding to the steering shaft, and a sleeve is provided inside the first support leg and outside the steering shaft.

[0017] Preferably, a support leg reinforcement plate II is further provided on the inner side of the two support leg uprights close to the sleeve, and the top of the support leg cover plate in the first support leg is connected to the upper reinforcement plate through an upper connecting plate on the side close to the steering reinforcement plate.

[0018] Preferably, a support beam is further provided at a position corresponding to the support leg between the left longitudinal beam and the right longitudinal beam, and the support beam comprises a first support beam located at the position of the first support leg and a second support beam located at the position of the second support leg.

[0019] Preferably, the first support beam includes a horizontally arranged support beam cover plate and a support beam upright plate vertically connected under the support beam cover plate. Three support beam upright plates are arranged in parallel, and an inverted "U"-shaped groove is arranged at the lower end of the support beam upright plate to provide movement space for the transmission shaft.

[0020] Preferably, an inverted "U"-shaped sealing plate is provided at the inverted "U"-shaped groove on the three supporting beam vertical plates to seal it and increase the strength.

[0021] Preferably, a reinforcing beam is connected below the inverted "U"-shaped sealing plate, and both ends of the reinforcing beam are respectively connected to the inverted "U"-shaped sealing plate by bolts, so that the reinforcing beam is detachable, which is convenient for maintenance and disassembly of the transmission shaft.

[0022] Preferably, disassembly interfaces are provided on the left longitudinal beam and the right longitudinal beam corresponding to the reinforcement beam to facilitate disassembly of the reinforcement beam.

[0023] Preferably, a sealing plate is provided between each two adjacent support beam uprights and on both sides of the inverted "U"-shaped groove, respectively, for connecting the two adjacent support beam uprights to play a reinforcing role.

[0024] Preferably, the frame structure is made of high-strength steel plates.

[0025] Beneficial effects of the present invention:

[0026] The crossbeam welding arrangement in the frame structure of the present invention ensures the connection strength of the left and right longitudinal beams, and at the left and right ends of the crossbeam uprights I and II, shaft sleeves are arranged for mounting the upper lugs of the oil and gas springs, eliminating the need to provide independent mounting seats for the upper lugs of the oil and gas springs, thereby saving installation space;

[0027] In addition, a suspension limit seat fixing plate is provided at the end of the cross beam vertical plate III in the cross beam welded in the frame structure of the present invention, which is used to install the suspension limit seat and play a limiting role for the suspension jump, without occupying the longitudinal beam installation space, reducing the installation process and saving the installation cost;

[0028] The support legs in the frame structure of the present invention can be connected to a jack, with a load-bearing capacity of not less than 25 tons, which can meet the installation and working requirements of the upper equipment and ensure the stability during parking work; and the steering vertical shaft is welded and fixed to the support legs, and there is no need to install a steering swing arm support for fixing, which saves the installation space of the steering swing arm support, reduces the installation process, and saves installation time and cost; and the setting of the sleeve in the support leg improves the installation accuracy of the steering vertical shaft and strengthens the installation strength;

[0029] The support beam arranged in the frame structure of the present invention provides a movement space for the transmission shaft while ensuring the strength of the support legs. The arrangement of the reinforcing beam at the inverted "U"-shaped groove of the support beam not only strengthens the strength of the support beam, but also overcomes the difficulties of difficult disassembly and assembly of the transmission shaft and poor maintainability.

[0030] The left longitudinal beam and the right longitudinal beam in the frame structure of the present invention adopt a "Z"-shaped structure, the lower wing plate of the longitudinal beam is turned inward, and the upper wing plate is turned outward, thereby increasing the installation space inside the frame;

[0031] The frame structure of the present invention has a high load-bearing capacity, ensures good off-road performance and passability of the transport vehicle, and has a wide range of applications.

Brief Description of the Drawings

[0032] Figure 1 is a structural schematic diagram of the frame structure of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the crossbeam welding in the frame structure of the present invention;

[0034] Figure 3 It is a structural schematic diagram of the frame structure of the present invention in which the cross beams are welded and the cover plate is removed;

[0035] Figure 4 yes Figure 1 A magnified schematic diagram of part B;

[0036] Figure 5 It is a schematic diagram of the structure in which the support beam, the support leg and the left and right longitudinal beams cooperate in the frame structure of the present invention;

[0037] Figure 6 is a schematic structural diagram of a support leg in the frame structure of the present invention;

[0038] Figure 7It is a structural schematic diagram of the support leg in the frame structure of the present invention without the support leg stand on one side;

[0039] Figure 8 It is a structural schematic diagram of a support beam in the frame structure of the present invention;

[0040] Fig. 9 It is a structural schematic diagram of the support beam in the frame structure of the present invention without a support beam upright plate;

[0041] Fig.10 for Figure 1 A large schematic diagram of part A in the middle;

[0042] Among them, 1-longitudinal beam; 101-longitudinal beam reinforcement support; 1011-L-type connection reinforcement plate; 1012-reinforcement rib plate; 2-front beam; 201-front cross beam; 202-front side beam; 2021-front beam outer plate; 2022-front beam inner plate; 2023-front beam upper cover plate; 2024-front beam bottom plate; 203-connecting lug; 204-cab flip connection structure; 3-tail beam; 4-cross beam welding; 401-cross beam cover plate; 402-cross beam bottom plate; 403-connecting plate; 404-cross beam plate I; 405-cross beam plate II; 406-cross beam plate III; 407-reinforcement plate I; 408-reinforcement plate II; 409-reinforcement plate III; 410-suspension limit seat fixing plate; 411-shaft sleeve; 412-support plate ;5-first supporting leg;501-supporting leg cover plate;502-supporting leg bottom plate;503-supporting leg vertical plate;504-jack connecting seat;505-steering vertical shaft;506-steering reinforcement plate;507-sleeve;508-supporting leg reinforcement plate I;509-supporting leg reinforcement rib;510-supporting leg reinforcement plate II;511-upper connecting plate;512-upper reinforcement plate;6-second supporting leg;7-first supporting beam;701-supporting beam cover plate I;702-supporting beam vertical plate;703-inverted "U" type sealing plate;704-sealing plate;705-reinforcement beam;706-supporting beam cover plate II;8-second supporting beam;9-steering reinforcement beam I;10-steering reinforcement beam II;11-support reinforcement beam;12-steering reinforcement beam III. [Specific implementation method]

[0043] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is described by the following specific embodiments, but is by no means limited thereto. The following are preferred embodiments of the present invention, which are only used to describe the present invention and cannot be understood as limiting the present invention. It should be pointed out that any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0044] The present invention provides a frame structure suitable for a transport vehicle, such as Figure 1 As shown, it includes a longitudinal beam 1, a front beam 2 connected to the front end of the longitudinal beam 1, and a tail beam 3 connected to the rear end of the longitudinal beam 1. The longitudinal beam 1 adopts a "Z"-shaped structure, with its bottom turned inward and its top turned outward, and includes a left longitudinal beam and a right longitudinal beam arranged oppositely, and a plurality of cross beams 4 are welded between the left longitudinal beam and the right longitudinal beam;

[0045] like Figure 2 and 3 As shown, the cross beam welding includes a horizontally arranged cross beam cover plate 401, a cross beam bottom plate 402 and a cross beam vertical plate connected between the cross beam cover plate 401 and the cross beam bottom plate 402, the cross beam vertical plate includes two cross beam vertical plates I404 and one cross beam vertical plate II405 arranged in parallel, the cross beam vertical plates I404 and II405 each include a middle portion located between the left longitudinal beam and the right longitudinal beam and an extension portion connected to the upper left and upper right of the middle portion, and the middle portion and the extension portion are integrally formed; the lower left and lower right of the cross beam vertical plates A connecting plate 403 is respectively connected, and the connecting plate 403 is set to an inverted "L" shape structure, including a vertical part and a horizontal part, the vertical part is fixedly connected to the left and right sides of the middle part of the crossbeam upright plate, and the horizontal part is fixedly connected to the bottom of the extension part, and the crossbeam weld is connected to the left and right longitudinal beams by bolts through the connecting plate 403, and the vertical part of the connecting plate 403 is located on the inner side of the left and right longitudinal beams, and the horizontal part is located on the top of the left and right longitudinal beams, that is, a part of the crossbeam weld 4 is located on the top of the left and right longitudinal beams, thereby reducing the occupation of the internal space of the frame.

[0046] The extension of the cross beam upright plate I404 is longer than the extension of the cross beam upright plate II405, and a circular hole is provided at one end of the extension of the cross beam upright plate I404 away from the middle part, the axial direction of the circular hole is the same as the length direction of the left and right longitudinal beams, and a shaft sleeve is provided in each circular hole for connecting the upper support ear of the oil and gas spring, and the upper support ear of the oil and gas spring is connected between the shaft sleeves of the two cross beam upright plates I404 through a pin shaft.

[0047] Preferably, a cross beam upright plate III406 is respectively arranged between the extension parts on both sides of the cross beam upright plate I and the cross beam upright plate II, and the structure of the cross beam upright plate III406 is the same as the structure of the extension part of the cross beam upright plate II, and the ends of the cross beam upright plates II and III away from the middle part are inclined, and a suspension limit seat fixing plate 410 is connected at the end thereof, and the angle between the plate and the vertical direction is 30 to 40 degrees, which is used for installing the suspension limit seat without occupying the longitudinal beam installation space, thereby ensuring the bearing capacity of the cross beam upright plate and playing the role of suspension upward jump limit.

[0048] Preferably, in order to improve the strength of the crossbeam weld 4, four reinforcing plates I407 perpendicular to the crossbeam uprights I404 are arranged between the two crossbeam uprights I404, and the reinforcing plates I407 are respectively arranged at the two ends of the middle part of the crossbeam upright I and between the extension parts of the two crossbeam uprights I404, and the two sides are respectively welded and fixed to the side surfaces of the two crossbeam uprights I404; a reinforcing plate II408 perpendicular to the crossbeam uprights I404 and II405 are respectively arranged on both sides of the middle part, and the two sides of the reinforcing plate II408 are respectively welded and fixed to the side surfaces of the crossbeam uprights I and II, and the side surfaces of the reinforcing plate II408 are connected to the side of the crossbeam uprights III406 close to the middle part.

[0049] Preferably, the extension parts on the opposite sides of the two crossbeam uprights I are respectively fixedly connected with a reinforcing plate III409, the structure of the reinforcing plate III409 is the same as the structure of the extension parts of the crossbeam uprights I403, and are connected by welding to improve the strength and prevent deformation during use.

[0050] Preferably, the middle of the crossbeam cover plate 401 is recessed inwards, and the whole is arched, which reserves enough space for the installation of upper equipment, and through holes are opened on the crossbeam vertical plates for the distribution and passage of heat pipes and high and low voltage lines.

[0051] Preferably, the number of the cross beams 4 is equal to the number of axles, and they are respectively arranged above each axle. In this embodiment, there are four groups of cross beams, which are respectively used as the main cross beams of the first to fourth axles. Figure 1 As shown, the welding direction of the cross beams above the first and second bridges is opposite to that of the cross beams above the third and fourth bridges.

[0052] Preferably, a support plate 412 is fixedly provided on the side of the crossbeam upright plate II405 welded to the crossbeam at the second bridge for supporting the output drive shaft of the gearbox.

[0053] like Figure 4 As shown, a vertical support plate 413 is fixedly arranged at both ends of the right side length direction of the crossbeam upright plate II405 in the crossbeam welding at a bridge, and the bottom of the vertical support plate 413 is fixedly connected to the outer edges of the left and right longitudinal beams respectively; the right side of the suspension limit seat fixing plate extends to be flush with the end of the vertical support plate, and the right end of the crossbeam cover plate also extends to the top of the vertical support plate and the suspension limit seat fixing plate, providing an installation platform for the rear suspension of the cab.

[0054] Preferably, in order to strengthen the strength of the left and right longitudinal beams at a bridge, a longitudinal beam reinforcement support 101 is respectively arranged at the left and right longitudinal beams above the bridge, including an L-shaped reinforcement connecting plate 1011 fixedly connected to the bending parts above the left and right longitudinal beams and a reinforcement rib plate 1012 arranged on the side of the L-shaped reinforcement connecting plate, the L-shaped reinforcement connecting plate includes a vertical part and a horizontal part, the vertical part is fixedly connected to the left and right longitudinal beams respectively, and the horizontal part is fixedly connected to the connection plate 403 welded to the cross beam.

[0055] like Figure 1 As shown, support legs are also provided on the outer sides of the left longitudinal beam and the right longitudinal beam, and the support legs include a first support leg 5 located between the first and second bridges and a second support leg 6 located between the fourth bridge and the tail beam;

[0056] like Figure 6 and 7 As shown, the first supporting leg 5 and the second supporting leg 6 each include a supporting leg cover plate 501, a supporting leg bottom plate 502 and a supporting leg vertical plate 503 connected between the supporting leg cover plate 501 and the supporting leg bottom plate 502, which are arranged relatively parallel. The supporting leg vertical plate 503 includes a front vertical plate, a rear vertical plate and a side vertical plate away from one end of the longitudinal beam. The supporting leg cover plate 501, the supporting leg bottom plate 502 and the supporting leg vertical plate 503 are mutually connected to form a box-type structure; the first supporting leg and the second supporting leg are connected to a jack connecting seat 504 at one end away from the left and right longitudinal beams; a supporting leg reinforcement plate I508 is vertically arranged on one side of the inner side of the front and rear vertical plates close to the jack connecting seat, and a supporting leg reinforcement rib 509 is also horizontally arranged between the front and rear vertical plates. The supporting leg reinforcement rib 509 is arranged as an elliptical ring structure with its two ends fixedly connected to the front and rear vertical plates respectively, and the front and rear vertical plates are also respectively provided with weight reduction holes that are elliptical and communicate with the supporting leg reinforcement rib 509.

[0057] A steering shaft 505 is arranged on the side of the first supporting leg away from the jack connecting seat 504, and the steering shaft 505 passes through the supporting leg bottom plate 502 and the supporting leg cover plate 501 from bottom to top and is welded and fixed thereto respectively; in order to improve the installation strength of the steering shaft 505, a steering reinforcement plate 506 is fixedly arranged at the top of the supporting seat cover plate 501 and the bottom of the supporting seat bottom plate 502 at the position corresponding to the steering shaft 505, and a sleeve 507 is arranged inside the first supporting leg and outside the steering shaft 505, and is welded and fixed to the steering shaft;

[0058] Preferably, one end of the support leg cover plate 501 close to the steering shaft 505 is set to be bent downward, and a support leg reinforcement plate II510 is also provided on the inner side of the front and rear plates close to the steering shaft, the top of which is welded and fixed to the support leg cover plate, and the two sides are respectively welded and fixed to the front and rear plates, so as to strengthen the bending part of the support leg cover plate; the top of the bending part of the support leg cover plate 501 in the first support leg is connected to the upper mounting reinforcement plate 512 through the upper mounting connecting plate 511, which is used to install the upper mounting equipment and provide support for the upper mounting equipment.

[0059] like Figure 1 As shown, support beams are further provided at the positions of the support legs between the left and right longitudinal beams, and the support beams are aligned with the cross sections of the support legs at the corresponding positions; the support beams include a first support beam 7 located at the position of the first support leg 5 and a second support beam 8 located at the position of the second support leg 6.

[0060] like Figure 8 As shown, the first support beam 7 includes a support beam cover plate I701 and a support beam upright plate 702 vertically connected to the bottom of the support beam cover plate I701, and three support beam upright plates 702 are arranged in parallel. The support beam cover plate I701 and the support beam upright plates 702 form a box-type structure, and the two ends of the support beam upright plates 702 are respectively welded and fixed to the left and right longitudinal beams; the lower end of the support beam upright plate 702 is provided with an upwardly concave inverted "U"-shaped groove to provide movement space for the transmission shaft; an inverted "U"-shaped sealing plate 703 is arranged at the inverted "U"-shaped grooves on the three support beam upright plates to block the space between the three support beam upright plates to increase the strength.

[0061] like Fig. 9 As shown, a sealing plate 704 is respectively provided between each two adjacent support beam uprights 702 and on the left and right sides of the inverted "U"-shaped groove, which is used to connect the two adjacent support beam uprights 702 to improve the strength of the leg support beam 7.

[0062] A reinforcing beam 705 is connected below the inverted "U" shaped sealing plate 703, and both ends of the reinforcing beam 705 are respectively connected to the inverted "U" shaped sealing plate 703 by bolts; Figure 5 As shown, disassembly interfaces 101 are reserved at corresponding positions on the left longitudinal beam and the right longitudinal beam to facilitate disassembly and assembly of the reinforcing beam 705 and maintenance and disassembly and assembly of the transmission shaft.

[0063] The reinforcing beam 705 includes a bent plate 7051 located in the middle and a connecting reinforcing plate 7052 connected to the left and right ends of the bent plate 7051. A threaded hole is arranged on the end face of the connecting reinforcing plate 7052. The left and right ends of the bottom of the inverted "U"-shaped sealing plate 703 are provided with through holes matching the threaded holes on the connecting reinforcing plate 7052, and they are connected by bolts.

[0064] Preferably, a rib plate (not shown in the figure) is further provided below the bent plate 7051, the length direction of the rib plate is parallel to the length direction of the vertical support beam plate 702, and is flush with the support beam plate located in the middle, thereby providing reinforcement for the bent plate.

[0065] Preferably, the middle of the support beam cover I701 is horizontal, and both ends extend upward respectively, and are fixedly connected to a horizontally arranged support beam cover II706 at both ends. The support beam cover II706 is flush with the end of the support leg close to the longitudinal beam. When the support leg is lifted, it strengthens the support legs on both sides. The support beam cover II706 is designed separately from the support beam cover I701, so it can bear better force.

[0066] The second support beam 8 is a box-type structure composed of a cover plate, a bottom plate and a vertical plate, and its left and right ends are respectively connected to the left and right longitudinal beams by bolts, and its specific structure is not repeated here.

[0067] like Fig.10 As shown, the bottom surface of the front beam 2 described in this embodiment is inclined, and the inclination angle is 18.5°, which is the same as the approach angle of the whole vehicle; it includes a front cross beam 201 and a front side beam 202 connected to the left and right longitudinal beams respectively, and the front cross beam 201 is fixedly connected to the front end of the front side beam 202; each front side beam 202 includes a front beam outer plate 2021, a front beam inner plate 2022 and a front beam upper cover plate 2023 and a front beam bottom plate 2024 respectively located at the top and bottom of the front beam outer plate 2021 and the front beam inner plate 2022, and a connecting lug 203 is respectively provided at both ends of the top of the front cross beam 201 as a front support of the cab, and a cab flip connection structure 204 is provided on the side of the front beam outer plate 2021, and the top of the two front beam upper covers 2023 is used to install the engine cooling system; the front beam 2 can also adopt the structure in the prior art (such as the structure of the front beam disclosed in patent CN113879400A).

[0068] The tail beam 3 includes a tail beam upper cover plate, a tail beam bottom plate, a tail beam vertical plate connected between the tail beam upper cover plate and the tail beam bottom plate, and tail beam connecting plates at both ends thereof respectively connected to the left and right longitudinal beams. The tail beam upper cover plate, the tail beam bottom plate and the tail beam vertical plate form a box-type structure. A through hole for the passage of the line is also provided on the tail beam vertical plate. The tail beam can adopt a structure commonly used in the prior art, and its specific structure will not be repeated here.

[0069] The frame structure also includes a steering reinforcement beam I9, a steering reinforcement beam II10, and a steering reinforcement beam III12 arranged between the left and right longitudinal beams, all of which are box-type structures consisting of a top plate, a bottom plate, front and rear vertical plates, and a connecting plate connected to the left and right longitudinal beams. The structure can be a box-type structural beam commonly used in the prior art (such as the steering reinforcement beam weld I and the steering reinforcement beam weld II disclosed in patent CN113879400A), and the cross-sectional shape is adjusted and determined according to the need to avoid the space for the transmission shaft, and its specific structure is not repeated here.

[0070] The frame structure also includes a support reinforcement beam 11 arranged between the left and right longitudinal beams, which is arranged as a box-type structure consisting of a top plate, a bottom plate, front and rear vertical plates and a connecting plate connected to the left and right longitudinal beams, and is arranged between the second bridge and the third bridge to provide support and reinforcement.

[0071] Preferably, the frame structure described in this embodiment uses high-strength steel plate BS700MCK2 with a yield strength of 680 MPa and a tensile strength of 750 MPa. The longitudinal beam section height is 730 mm and the length is about 1295 mm.

[0072] The above-mentioned embodiments only express certain implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of this part. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A frame structure suitable for a transport vehicle, characterized in that: It comprises a longitudinal beam, a front beam connected to the front end of the longitudinal beam and a tail beam connected to the rear end of the longitudinal beam, the longitudinal beam comprises a left longitudinal beam and a right longitudinal beam arranged opposite to each other, and a plurality of cross beam welds are arranged between the left longitudinal beam and the right longitudinal beam; the cross beam welds comprise a horizontally arranged cross beam cover plate, a cross beam bottom plate and a cross beam vertical plate connected between the cross beam cover plate and the cross beam bottom plate, a connecting plate is respectively arranged at the lower left and lower right of the cross beam vertical plate, and is connected to the left longitudinal beam and the right longitudinal beam through the connecting plate; the cross beam vertical plate comprises two cross beam vertical plates I and a cross beam vertical plate II arranged in sequence, and a shaft sleeve is respectively arranged at the left and right ends of the two cross beam vertical plates I; A cross beam plate III is respectively arranged on the left and right sides between the cross beam plate I and the cross beam plate II; the left and right ends of the cross beam plate II and the cross beam plate III are respectively arranged obliquely, and a suspension limit seat fixing plate is connected at the end thereof; The number of welded cross beams is equal to the number of axles, and they are respectively arranged above each axle; A vertical support plate is fixedly arranged at both ends of the right side of the cross beam vertical plate II in the cross beam welding at the bridge, and the bottom of the vertical support plate is fixedly connected to the left and right longitudinal beams respectively; the right side of the suspension limit seat fixing plate extends to be flush with the end of the vertical support plate, and the right end of the cross beam cover plate also extends to the top of the vertical support plate and the suspension limit seat fixing plate; The crossbeam welding comprises a horizontally arranged crossbeam cover plate, a crossbeam bottom plate and a crossbeam upright plate connected between the crossbeam cover plate and the crossbeam bottom, the crossbeam upright plate comprises two crossbeam upright plates I and one crossbeam upright plate II arranged in parallel, the crossbeam upright plate I and the crossbeam upright plate II both comprise a middle portion located between the left longitudinal beam and the right longitudinal beam and an extension portion connected to the upper left and upper right of the middle portion, the middle portion and the extension portion being integrally formed; a connecting plate is respectively connected to the lower left and lower right of the crossbeam upright plate, the connecting plate is arranged as an inverted "L"-shaped structure, comprising a vertical portion and a horizontal portion, the vertical portion of which is fixedly connected to the left and right sides of the middle portion of the crossbeam upright plate, the horizontal portion is fixedly connected to the bottom of the extension portion, the crossbeam welding is connected to the left and right longitudinal beams by bolts through the connecting plate, the vertical portion of the connecting plate is located on the inner side of the left and right longitudinal beams, the horizontal portion is located on the top of the left and right longitudinal beams, a portion of the crossbeam welding is located on the top of the left and right longitudinal beams, thereby reducing the occupation of the internal space of the frame; The extension of the cross beam upright plate I is longer than the extension of the cross beam upright plate II. A circular hole is provided at one end of the extension of the cross beam upright plate I away from the middle part. The axial direction of the circular hole is the same as the length direction of the left and right longitudinal beams. A shaft sleeve is provided in each circular hole for connecting the upper support ear of the oil and gas spring. The upper support ear of the oil and gas spring is connected between the shaft sleeves of the two cross beam upright plates I through a pin shaft.

2. The frame structure suitable for a transport vehicle according to claim 1, characterized in that: The outer sides of the left longitudinal beam and the right longitudinal beam are respectively provided with support legs perpendicular to them, and the support legs include a first support leg located between the first bridge and a second support leg located between the fourth bridge and the tail beam, and the first support leg and the second support leg both include a horizontally arranged support leg cover plate, a support leg bottom plate and a support leg vertical plate connected between the support leg cover plate and the support leg bottom plate; the first support leg and the second support leg are connected to a jack connecting seat at one end away from the left and right longitudinal beams.

3. The frame structure suitable for a transport vehicle according to claim 2, characterized in that: A steering vertical shaft is arranged on one side of the first supporting leg away from the jack connecting seat, and the steering vertical shaft passes through the supporting leg bottom plate and the supporting leg cover plate from bottom to top and is respectively welded and fixed thereto.

4. The frame structure suitable for a transport vehicle according to claim 3, characterized in that: A steering reinforcement plate is fixedly arranged on the top of the support leg cover plate of the first support leg and the bottom of the support seat bottom plate at positions corresponding to the steering vertical shaft, and a sleeve is arranged inside the first support leg and outside the steering vertical shaft.

5. The frame structure suitable for a transport vehicle according to claim 2, characterized in that: A support beam is also provided at the position of the support leg corresponding to the left longitudinal beam and the right longitudinal beam, and the support beam includes a first support beam located at the position of the first support leg and a second support beam located at the position of the second support leg; the first support beam includes a support beam cover plate and a support beam upright plate vertically connected under the support beam cover plate, and three support beam upright plates are provided in parallel; an inverted "U"-shaped groove is provided at the lower end of the support beam upright plate, and an inverted "U"-shaped sealing plate is provided at the inverted "U"-shaped groove on the three support beam upright plates.

6. The frame structure suitable for a transport vehicle according to claim 5, characterized in that: A reinforcing beam is connected below the inverted "U" shaped sealing plate, and both ends of the reinforcing beam are respectively connected to the inverted "U" shaped sealing plate by bolts.

7. The frame structure suitable for a transport vehicle according to claim 6, characterized in that: A sealing plate is respectively arranged between every two adjacent supporting beam uprights and on the left and right sides of the inverted "U"-shaped groove to connect the two adjacent supporting beam uprights.

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