Vehicle frame structure and engineering vehicle

Abstract

The invention relates to a vehicle frame structure and an engineering vehicle and relates to the technical field of vehicle frames, the vehicle frame structure comprises a longitudinal beam assembly, a cross beam assembly, two bracket supports, a plurality of clamping plate supports and a battery bracket, the longitudinal beam assembly comprises two longitudinal beams arranged at intervals, and the two ends of the cross beam assembly are fixedly connected with the longitudinal beams correspondingly; the bracket supports are fixedly connected with beam bottom plates of the longitudinal beams in a one-to-one correspondence mode, the clamping plate supports are arranged at intervals in the extending direction of the longitudinal beams, each clamping plate support comprises a first mounting plate and a second mounting plate, the first mounting plates and the second mounting plates are fixedly connected with the longitudinal beams in a clamping mode through fasteners, and the first mounting plates are arranged on the outer sides of the longitudinal beams. One end of the battery bracket is fixedly connected with the first mounting plate, and the other end of the battery bracket is fixedly connected with the bracket support. According to the frame structure, the clamping plate support and the bracket support are arranged to be used for connecting the battery bracket and the longitudinal beam, the connecting strength of the battery bracket and the longitudinal beam is improved, and deformation of the longitudinal beam and the frame structure is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle frame, in particular to a frame structure and an engineering vehicle. BACKGROUND

[0002] The engineering vehicle is a professional transport equipment for open-pit mining. In the actual use process of the engineering vehicle, it is often required to have low cost, large load and high work efficiency. Under the background of greenization, intelligentization and sustainable development strategy, hybrid and pure electric mine dump trucks have occupied an important position in the industry. In order to provide enough power support for the mine dump truck, it is necessary to equip the vehicle with a larger and heavier battery pack.

[0003] The battery pack assembly mode of the engineering vehicle includes backpack type and side hanging type. The backpack type battery pack directly bears the main load by the upper surface of the frame, but this way will compress the loading volume of the cargo box without changing the length of the vehicle, which is not conducive to improving the loading efficiency of the mine dump truck. The traditional side hanging type battery pack usually adopts welding or bolt fixing mode to directly connect the battery bracket with the single side wall of the longitudinal beam, and the single side wall of the longitudinal beam bears the main load, which is easy to cause fatigue fracture due to stress concentration, and the assembly mode is relatively complex. For large mine dump trucks with dozens or even hundreds of tons of load, the ordinary side hanging structure is difficult to meet the strength requirement.

[0004] Therefore, how to design a battery pack assembly mode that can meet the high strength requirement has become a problem to be solved at present. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a frame structure and a mine car.

[0006] In a first aspect, the present application provides a frame structure, which adopts the following technical scheme:

[0007] To achieve the above-mentioned purpose, the present application provides a frame structure, which comprises a longitudinal beam assembly, a cross beam assembly, two bracket supports, a plurality of clamping plate supports and a battery bracket. The longitudinal beam assembly comprises two longitudinally arranged longitudinal beams. The two ends of the cross beam assembly are fixedly connected with the longitudinal beams respectively. The bracket supports are fixedly connected with the beam bottom plates of the longitudinal beams one by one. The clamping plate supports are arranged at intervals along the extension direction of the longitudinal beams. The clamping plate support comprises a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate are fixedly connected with the longitudinal beam by clamping through fasteners. The first mounting plate is arranged on the outer side of the longitudinal beam. One end of the battery bracket is fixedly connected with the first mounting plate, and the other end of the battery bracket is fixedly connected with the bracket support.

[0008] Further, the bracket support is provided with a mounting portion protruding away from the beam bottom plate, the mounting portion is provided with a through hole, the bracket mounting beam is fixedly connected with the mounting portion through the through hole, the bracket mounting beam has a load-bearing segment exposed to the mounting portion, the load-bearing segment is used for supporting the battery bracket, and the load-bearing segment is provided with a bracket mounting plate away from one side of the longitudinal beam.

[0009] Further, the bracket support comprises an outer stand plate, an inner stand plate and a bent plate connecting the outer stand plate and the inner stand plate, the outer stand plate and the inner stand plate are fixedly arranged on the inner and outer sides of the beam bottom plate in a spaced-apart manner, and the bracket mounting beam is fixedly connected with the inner stand plate and the outer stand plate.

[0010] Further, the bracket support is provided with a plurality of mounting portions along the extension direction of the longitudinal beam, and adjacent mounting portions are connected in a smooth transition manner.

[0011] Further, the bracket mounting beam is provided with a cross beam mounting plate at one end thereof away from the bracket mounting plate in the axial direction, the cross beam mounting plate is a ring-shaped steel plate, the cross beam mounting plate is provided with a plurality of threaded holes, and the cross beam mounting plate is fixedly welded with the outer end surface of the bracket mounting beam.

[0012] Further, the vehicle frame structure further comprises a lifting cross beam and a first bracket, the lifting cross beam is fixedly connected with the bracket support through the through hole, the first bracket is arranged on the outer side of the bracket support and is arranged in a spaced-apart manner along the lifting cross beam, the first bracket is provided with a fixed portion, the fixed portion is provided with a horizontal portion on both sides along the extension direction of the longitudinal beam, the fixed portion is provided with a mounting hole, the first bracket is fixedly connected with the lifting cross beam through the mounting hole, and the horizontal portion is used for lifting the battery bracket.

[0013] Further, the vehicle frame structure further comprises a bracket cross beam, the axial direction of the bracket cross beam is perpendicular to the extension direction of the longitudinal beam, and the bracket cross beam is arranged below the longitudinal beam and is used for connecting the battery bracket on the outer side of the longitudinal beam.

[0014] Further, the bracket support further comprises a pad, the pad is protrusively arranged on the inner side of the first mounting plate and / or the second mounting plate, the bottom surface of the pad abuts against the beam top plate, and the first mounting plate, the second mounting plate and the pad are respectively provided with threaded holes for assembly bolts.

[0015] Further, the bracket support further comprises a pad, the pad is protrusively arranged on the inner side of the first mounting plate and / or the second mounting plate, the bottom surface of the pad abuts against the beam top plate, and the first mounting plate, the second mounting plate and the pad are respectively provided with threaded holes for assembly bolts.

[0016] In the second aspect, the present application provides an engineering vehicle, which adopts the following technical scheme:

[0017] An engineering vehicle comprising a battery pack and the frame structure of the first aspect, the battery pack being disposed in the battery carrier.

[0018] The frame structure and the engineering vehicle provided by the application have at least one of the following beneficial technical effects:

[0019] By arranging the clamping plate support and the carrier support on the longitudinal beam, one end of the battery carrier is fixed to the outer side of the longitudinal beam through the clamping plate support, and the other end is connected to the beam bottom plate of the longitudinal beam through the carrier support, forming a "side-bottom" two-way support system. This layout improves the connection strength between the battery carrier and the longitudinal beam, avoids deformation of the longitudinal beam and the frame structure, and distributes the weight and vibration load of the battery pack to multiple key positions of the longitudinal beam, so that the arrangement of the battery is better.

[0020] By arranging the clamping plate support to fix the battery carrier on the longitudinal beam, the clamping plate support can be fixedly connected with the inner side plate and the outer side plate of the longitudinal beam, and then the battery carrier is installed on the first mounting plate, so that the load of the battery carrier is transmitted to multiple contact surfaces of the longitudinal beam through the first mounting plate and the second mounting plate, instead of being concentrated on a single side of the longitudinal beam. This design effectively disperses local stress and reduces the risk of fatigue damage of the longitudinal beam caused by concentrated stress.

[0021] By arranging the carrier support and the carrier mounting beam, the mounting mode of the battery carrier is optimized, an upward lifting force is provided for the battery carrier, the connection shear force between the battery carrier and the longitudinal beam is reduced, the stability and load-bearing capacity of the battery carrier are further improved, the installation stability of the battery assembly on the frame is increased, and the overall performance and reliability of the frame structure are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a schematic view of a frame structure provided by an embodiment of the present application;

[0024] Figure 2 is a schematic view of a frame structure provided by an embodiment of the present application;

[0025] Figure 3 is a schematic view of a frame structure provided by an embodiment of the present application;

[0026] Figure 4is a schematic diagram of a clamping plate support three-dimensional structure provided by an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of a bracket support three-dimensional structure provided by an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a battery bracket three-dimensional structure provided by an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of a battery bracket side view structure provided by an embodiment of the present application;

[0030] Figure 8 is a schematic diagram of a partial structure of a frame structure provided by an embodiment of the present application;

[0031] Figure 9 is a schematic diagram of a connection structure of a first bracket, a bracket support and a lifting cross beam provided by an embodiment of the present application;

[0032] Figure 10 is a schematic diagram of a connection structure of a first bracket and a battery bracket provided by an embodiment of the present application.

[0033] In the figure, 100, longitudinal beam; 110, beam bottom plate; 120, beam top plate; 130, inner side plate; 140, outer side plate; 200, cross beam assembly; 210, lifting cross beam; 220, bracket cross beam; 300, bracket support; 310, mounting portion; 311, outer vertical plate; 312, inner vertical plate; 313, bent plate; 314, extension foot; 315, through hole; 320, recessed portion; 400, clamping plate support; 410, first mounting plate; 420, second mounting plate; 440, cushion block; 450, cushion plate; 500, battery bracket; 510, first support plate; 511, annular clamping groove; 520, second support plate; 521, positioning plate; 522, reinforcing rib plate; 530, L-shaped support; 600, fastener; 700, bracket mounting beam; 710, load-bearing section; 720, groove; 730, bracket mounting plate; 740, cross beam mounting plate; 750, rib plate; 800, first bracket; 810, bracket bottom plate; 820, bracket top plate; 830, bracket vertical plate; 831, fixed portion; 832, horizontal portion; 840, mounting hole. DETAILED DESCRIPTION

[0034] The following will be described in detail with reference to the accompanying drawings. Figure 1 The accompanying drawings are included to provide a further understanding of the present application, and are incorporated herein and constitute a part of the detailed description. The drawings illustrate embodiments of the present application and, together with the detailed description, serve to explain the principles of the present application. Figure 10 In the description of the present application, specific embodiments are described in a way that enables a person skilled in the art to make and use the present application. However, the present application is not limited to the embodiments described, but encompasses all alternatives falling within the scope of the present application.

[0035] It should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0036] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0037] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed in the present application.

[0039] As shown in the Figures 1 to 3 The embodiment of the present application discloses a frame structure, which comprises a longitudinal beam assembly, a cross beam assembly 200, two bracket supports 300, a plurality of clamping plate supports 400 and a battery bracket 500. The longitudinal beam assembly comprises two longitudinally spaced longitudinal beams 100. The two ends of the cross beam assembly 200 are fixedly connected with the longitudinal beams 100 respectively. The bracket supports 300 are fixedly connected with the beam bottom plates 110 of the longitudinal beams 100 one by one. A plurality of clamping plate supports 400 are spaced along the extension direction of the longitudinal beams 100. The clamping plate supports 400 comprise first mounting plates 410 and second mounting plates 420. The first mounting plates 410 and the second mounting plates 420 are fixedly connected with the longitudinal beams 100 by fasteners. The first mounting plates 410 are arranged on the outer sides of the longitudinal beams 100. One end of the battery bracket 500 is fixedly connected with the first mounting plates 410, and the other end of the battery bracket 500 is fixedly connected with the bracket supports 300.

[0040] Specifically, the longitudinal beam assembly is composed of two parallel and spaced box-shaped longitudinal beams 100, the longitudinal beam 100 includes oppositely arranged beam top plate 120, beam bottom plate 110 and connecting inner side plate 130 and outer side plate 140 of beam top plate 120 and beam bottom plate 110, beam top plate 120 and beam bottom plate 110, inner side plate 130 and outer side plate 140 are welded into a quadrilateral through structure, the longitudinal beam 100 maintains a rectangular through state, which relieves the stress concentration phenomenon caused by structural mutation, at the same time, the end of the longitudinal beam 100 where the gantry is installed is set as the front end of the longitudinal beam 100, the beam top plate 120 of the front end of the longitudinal beam 100 extends outward and bends downward, forming a step change structure, which makes the structure of the front longitudinal beam 100 more simple, improves the carrying capacity of the longitudinal beam 100, improves the stress state of the longitudinal beam 100, and is supported and welded at the connection between the beam top plate 120, the beam bottom plate 110 and the left side plate and the right side plate through the gusset plate 450, which enhances the carrying capacity and reliability of the longitudinal beam 100.

[0041] The connecting direction of the beam bottom plate 110 and the beam top plate 120 of the longitudinal beam 100 is set as the vertical direction, the cross beam assembly 200 is fixed between the longitudinal beams 100 by welding or bolt connection, forming a whole frame structure; the battery pack of the vehicle is hung on the outer side plate 140 of the longitudinal beam 100 through the battery bracket 500. A plurality of clamping plate supports 400 are provided along the extension direction of the longitudinal beam 100, the clamping plate support 400 includes a first mounting plate 410 and a second mounting plate 420, the first mounting plate 410 abuts against the outer side plate 140, the second mounting plate 420 abuts against the inner side plate 130, the first mounting plate 410 and the second mounting plate 420 are clamped and fixed with the longitudinal beam 100 through the fastener 600, and the bracket support 300 is fixed and installed one by one on the beam bottom plate 110 of the longitudinal beam 100. Along the vertical direction, one end of the battery bracket 500 is connected with the clamping plate support 400, and the other end is fixedly connected with the bracket support 300, and the bracket support 300 is used for lifting and / or installing the battery bracket 500.

[0042] Further, the fastener 600 is a bolt, wherein the first mounting plate 410 and the second mounting plate 420 are provided with a plurality of threaded holes, the first mounting plate 410 and the second mounting plate 420 have a highest height in the vertical direction higher than the height of the beam top plate 120, at least one bolt has a mounting position higher than the beam top plate 120 in the vertical direction, and the side surface of the bolt abuts against the beam top plate 120, and the outer side plate 140 and the inner side plate 130 of the longitudinal beam 100 are provided with threaded holes, and the bolts pass through the clamp support 400 and the longitudinal beam 100 in sequence. By arranging a plurality of bolts to connect the longitudinal beam 100 and the clamp support 400, the vertical bearing capacity of the clamp support 400 is improved, a base point is provided for the installation of the battery bracket 500, and the destructive operation of the traditional welding process on the structure of the longitudinal beam 100 is avoided, the clamp support 400 is quickly positioned, adjusted and fixed on the longitudinal beam 100, the assembly time is reduced, and the dependence on special equipment is reduced, and the clamp support 400 is especially suitable for the later modification or replacement requirement of the battery bracket 500.

[0043] The clamp support 400 is fixedly connected with the inner side plate 130 and the outer side plate 140 of the longitudinal beam 100, and then the battery bracket 500 is installed on the first mounting plate 410. The clamp support 400 of the present application is arranged to pass through the inner side plate 130 and the outer side plate 140 of the longitudinal beam 100 by a plurality of bolts, and at least one bolt has a mounting position higher than the beam top plate 120 and abuts against the beam top plate 120, so that the load of the battery bracket 500 is transmitted to a plurality of contact surfaces of the longitudinal beam 100 through the first mounting plate 410 and the second mounting plate 420, instead of being concentrated on a single side surface of the longitudinal beam 100. Compared with directly installing the battery bracket 500 on the outer side plate 140 of the longitudinal beam 100, this design effectively disperses the local stress and reduces the risk of fatigue damage of the longitudinal beam 100 caused by concentrated stress. In addition, the bolt is arranged above the beam top plate 120, so that the clamp support 400 is hung on the longitudinal beam 100, thereby improving the vertical bearing capacity of the clamp support 400.

[0044] By arranging the clamp support 400 and the bracket support 300 on the longitudinal beam 100, one end of the battery bracket 500 is fixed to the outer side of the longitudinal beam 100 through the clamp support 400, and the other end is connected to the beam bottom plate 110 of the longitudinal beam 100 through the bracket support 300, forming a "side-bottom" bidirectional support system. This layout divides the weight and vibration load of the battery pack to a plurality of key positions of the longitudinal beam 100, thereby significantly improving the anti-overturning capacity and impact resistance of the battery bracket 500.

[0045] In an embodiment of the present application, the bracket support 300 is provided with a mounting portion 310 protruding away from the beam bottom plate 110, the mounting portion 310 is provided with a through hole 315, the bracket mounting beam 700 is fixedly connected with the mounting portion 310 through the through hole 315, the bracket mounting beam 700 has a load-bearing segment 710 exposed to the mounting portion 310, the load-bearing segment 710 is used for supporting the battery bracket 500, and the load-bearing segment 710 is provided with a bracket mounting plate 730 away from one side of the longitudinal beam 100, and the battery bracket 500 is fixedly connected with the bracket mounting plate 730.

[0046] As shown in Figures 3 to 7 In order to increase the contact area of the battery bracket 500 and the bracket support 300 and improve the stability of the installation of the battery bracket 500, the bracket support 300 is formed by a punching or casting process in a vertical direction to protrude away from the beam bottom plate 110 to form a mounting portion 310, and the mounting portion 310 is used for mounting the battery bracket 500. The mounting portion 310 is provided with a through hole 315, the bracket mounting beam 700 is fixedly connected with the mounting portion 310 through the through hole 315, the bracket mounting beam 700 is a tubular integral casting and has high strength and stability.

[0047] The axis of the bracket mounting beam 700 extends in the direction of the adjacent longitudinal beam 100 and is perpendicular to the extension line of the longitudinal beam 100, further, the bracket mounting beam 700 includes a load-bearing segment 710 arranged outside the longitudinal beam 100, the load-bearing segment 710 is provided with a groove 720 away from one end of the longitudinal beam 100, the bracket mounting plate 730 is fixedly connected with the groove 720, and further the bracket mounting plate 730 is fixedly connected with the mounting portion 310.

[0048] Specifically, the battery bracket 500 comprises a first support plate 510 arranged vertically, a second support plate 520 arranged horizontally, and an L-shaped support 530 connecting the first support plate 510 and the second support plate 520, the extension direction of the first support plate 510 is perpendicular to the extension direction of the second support plate 520, and the L-shaped support is arranged on both sides of the first support plate 510 and the second support plate 520 and is connected with the first support plate 510 and the second support plate 520, so that the battery bracket 500 is in the shape of "L". In addition, one end of the first support plate 510 close to the mounting portion 310 is provided with an annular clamping groove 511, the outer side of the load-bearing section 710 is clamped with the annular clamping groove 511, and the vertical lifting of the bracket mounting beam 700 to the battery bracket 500 is realized. In addition, the first support plate and the second support plate 520 are provided with a reinforcing rib plate 522, the reinforcing rib plate 522 is connected with the L-shaped support at the same time, the side edge of the second support plate 520 close to the L-shaped support 530 is bent and extended downward, and the bottom side of the second support plate 520 away from the first support plate 510 is provided with a positioning plate 521, the positioning plate 521 is fixedly connected with the second support plate 520 and the L-shaped support. One end of the annular clamping groove 511 away from the mounting portion 310 is provided with a bracket mounting plate 730, the mounting plate is a circular steel plate, the bracket mounting plate 730 is fixedly connected with the groove 720, can effectively disperse structural stress, improve structural strength and service life, and at the same time, a threaded hole is formed on the circular surface, the bracket mounting plate 730 is fixedly connected with the positioning plate 521 through a bolt, and the secondary fixation of the battery bracket 500 and the bracket support plate is realized.

[0049] Through the convex design of the mounting portion 310, a more stable support point is provided for the bracket mounting beam 700, so that the stress point of the bracket mounting beam 700 is away from the body of the longitudinal beam 100, and fatigue cracking of the longitudinal beam 100 caused by local stress concentration is avoided. In addition, by arranging the load-bearing section 710, the weight of the battery bracket 500 can be more evenly distributed to the bracket mounting beam 700. Compared with the prior art, the vertical shear force borne by the bolts connecting the battery bracket 500 and the longitudinal beam 100 is reduced, and the stability and load-bearing capacity of the structure are further improved. At the same time, the annular clamping groove 511 of the first support plate 510 cooperates with the load-bearing section 710, which facilitates the fixed installation of the battery bracket 500 and avoids the problem of partial load caused by installation error. The arrangement of the bracket mounting plate 730 provides an additional fixing point for the battery bracket 500, and enhances the stability and safety of the battery bracket 500 during installation. In summary, by arranging the mounting portion 310 and the bracket mounting beam 700, the installation mode of the battery bracket 500 is optimized, the installation stability of the battery assembly on the frame is increased, and the overall performance and reliability of the frame structure are improved.

[0050] It should be noted that the mounting connection mode of the bracket mounting beam 700 and the through hole 315 and the connection mode of the bracket mounting plate 730 and the groove 720 are not limited in the present application, and in an embodiment, the bracket mounting beam 700 and the through hole 315, and the bracket mounting plate 730 and the groove 720 are fixedly connected by welding.

[0051] In an embodiment of the present application, the bracket support 300 comprises an outer stand plate 311, an inner stand plate 312, and a bent plate 313 connecting the outer stand plate 311 and the inner stand plate 312, the outer stand plate 311 and the inner stand plate 312 are fixedly arranged on the inner and outer sides of the beam bottom plate 110 in parallel, and the bracket mounting beam 700 is fixedly connected with the inner stand plate 312 and the outer stand plate 311.

[0052] As shown in Figure 1 , Figure 8 , the outer stand plate 311 and the inner stand plate 312 are fixedly arranged on the outer side and the inner side of the beam bottom plate 110 respectively, and are arranged in parallel. Specifically, the outer stand plate 311 is arranged below the outer side plate 140, the inner stand plate 312 is arranged below the inner side plate 130, the upper edges of the outer stand plate 311 and the inner stand plate 312 are fixedly welded to the beam bottom plate 110, and the lower edges of the outer stand plate 311 and the inner stand plate 312 are fixedly welded to the bent plate 313, forming an arched support structure. The bracket support 300 is composed of the outer stand plate 311, the inner stand plate 312, and the bent plate 313 connecting the outer stand plate 311 and the inner stand plate 312, forming a stable frame structure. The outer stand plate 311 and the inner stand plate 312 are provided with aligned through holes 315, and the bracket mounting beam 700 is fixedly connected with the outer stand plate 311 and the inner stand plate 312 through the through holes 315.

[0053] The outer stand plate 311 and the inner stand plate 312 are fixedly arranged on the inner and outer sides of the beam bottom plate 110 in parallel, which not only ensures the symmetry and balance of the bracket support 300, but also significantly improves the overall rigidity and torsional capacity of the bracket support 300 through the symmetrical fixing mode. In addition, the introduction of the bent plate 313 not only increases the connection strength between the outer stand plate 311 and the inner stand plate 312, but also provides support for the bracket support 300, which ingeniously disperses the load and reduces stress concentration, thereby prolonging the service life of the entire structure. The weight of the battery pack is evenly distributed to both sides of the longitudinal beam 100 through the cooperation of the bracket mounting beam 700 and the through hole 315, avoiding local deformation or fatigue cracking caused by unilateral stress.

[0054] In addition, as shown in Figure 5 , Figure 8As shown in the drawings, the outer vertical plate 311 and the inner vertical plate 312 are provided with extension feet 314 at both ends along the extension direction of the longitudinal beam 100, and the extension feet 314 of the outer vertical plate 311 near the front end of the longitudinal beam 100 are shorter than the extension feet 314 of the inner vertical plate 312. By setting the extension feet 314, the stress distribution of the outer vertical plate 311 and the inner vertical plate 312 is further optimized, and the stability of the connection between the bracket support 300 and the beam bottom plate 110 is enhanced. At the same time, by setting the extension feet 314 of the outer vertical plate 311 near the front end of the longitudinal beam 100 to be shorter than the extension feet 314 of the inner vertical plate 312, the extension feet 314 of the outer vertical plate 311 and the beam bottom plate 110 at the front end of the longitudinal beam 100 can be accurately butt-jointed, ensuring the compactness and firmness of the connection part; in addition, by setting different extension foot 314 lengths of the outer vertical plate 311 and the inner vertical plate 312, the stress concentration of the extension feet 314 when the bracket support 300 is connected with the beam bottom plate 110 is reduced, so as to ensure the stability of the connection between the bracket support 300 and the beam bottom plate 110. Further, in order to increase the strength and stability of the connection between the outer vertical plate 311 and the beam bottom plate 110, the contact area of the outer vertical plate 311 and the beam bottom plate 110 is greater than that of the inner vertical plate 312 and the beam bottom plate 110.

[0055] In an embodiment of the present application, the bracket support 300 is provided with a plurality of mounting portions 310 along the extension direction of the longitudinal beam 100, and adjacent mounting portions 310 are connected by smooth transition.

[0056] As shown in the drawings, Figure 5 , Figure 8 As shown in the drawings, the bracket support 300 is provided with three mounting portions 310 along the extension direction of the longitudinal beam 100, and a recessed portion 320 is provided between adjacent mounting portions 310, and the recessed portion 320 and the mounting portion 310 are connected by smooth transition. These mounting portions 310 are connected by smooth transition through careful design.

[0057] By setting a plurality of mounting portions 310, a plurality of mounting and fixing points are provided for the battery bracket 500, which better adapts to the installation of large-size battery assemblies, makes the vehicle frame more stable when carrying heavy objects, and improves the overall stiffness and anti-deformation capability of the bracket support 300 and the longitudinal beam 100. In addition, by connecting the recessed portion 320 and the mounting portion 310 by smooth transition, the overall structural strength of the bracket support 300 is improved, and the stress distribution is optimized. The setting of the recessed portion 320 can reduce the weight of the bracket support 300 to a certain extent, while maintaining sufficient strength and rigidity to meet the stringent requirements of engineering vehicles for the frame structure. In addition, the smoothness and aesthetics of the bracket support 300 are also enhanced, which helps to reduce stress concentration and improve the durability and service life of the bracket support 300.

[0058] In one embodiment of the present invention, a crossbeam mounting plate 740 is provided at one end of the bracket mounting beam 700 away from the bracket mounting plate 730 along its axial direction. The crossbeam mounting plate 740 is an annular steel plate and has a plurality of threaded holes. The crossbeam mounting plate 740 is welded and fixed to the outer end face of the bracket mounting beam 700.

[0059] like Figure 5 , Figure 7 As shown, a crossbeam mounting plate 740 is provided at one end of the bracket mounting beam 700 away from the bracket mounting plate 730 along its axial direction. Since the bracket supports 300 are spaced apart on the underside of the longitudinal beams 100, that is, the two bracket supports 300 are arranged relatively spaced apart, the two crossbeam mounting plates 740 are located between the two longitudinal beams 100. The crossbeam mounting plate 740 adopts a ring-shaped steel plate structure, which is welded to the ring-shaped end face of the bracket mounting beam 700. The crossbeam mounting plate 740 has multiple threaded holes, which are distributed along the axial direction of the center of the crossbeam mounting plate 740. By setting the crossbeam mounting plate 740 as a ring, the crossbeam mounting plate 740 is welded and fixed to the outer end face of the bracket mounting beam 700. At the same time, multiple stiffening plates 750 are provided between the bracket mounting beam 700, the crossbeam mounting plate 740, and the inner vertical plate 312.

[0060] By employing this design, the annular steel plate, through its closed cross-section structure, evenly distributes the stress on the crossbeam mounting plate 740 to multiple contact points of the bracket mounting beam 700. This avoids fatigue cracking caused by stress concentration at corners, a problem common with traditional square mounting plates, thus improving the torsional stiffness of the connection. Furthermore, the stress distribution characteristics of the annular cross-section reduce localized stress concentration. Under vehicle turning or bumpy conditions, the crossbeam mounting plate 740 effectively suppresses torsional deformation of the bracket mounting beam 700, ensuring the stability of the battery bracket 500. By fixing the crossbeam mounting plate 740 to the circular tube crossbeam, the threaded holes on the crossbeam mounting plate 740 support quick positioning and locking of the circular tube crossbeam, reducing assembly time. Additionally, the crossbeam mounting plate 740, located between the two longitudinal beams 100, provides a fixed mounting point for the circular tube crossbeam, further enhancing the structural stability between the longitudinal beams 100.

[0061] In summary, the technical solution of the present invention enhances the overall stability of the frame by using a round tube crossbeam that can be firmly installed on the bracket mounting beam 700; the design of the annular steel plate not only provides sufficient installation area, but also increases the strength and rigidity of the structure.

[0062] In an embodiment of the present application, the frame structure further comprises a lifting crossbeam 210 fixedly connected with the bracket support 300 through the through hole 315, and a first bracket 800 arranged outside the bracket support 300 and spaced along the lifting crossbeam 210, the first bracket 800 is provided with a fixing portion 831, the fixing portion 831 is provided with a horizontal portion 832 on both sides along the extending direction of the longitudinal beam, the fixing portion 831 is provided with a mounting hole 840, the first bracket 800 is fixedly connected with the lifting crossbeam 210 through the mounting hole 840, and the horizontal portion 832 is used for lifting the battery bracket 500. The first bracket 800 comprises a bracket bottom plate 810, a bracket top plate 820 and at least two bracket upright plates 830, the bracket top plate 820 and the bracket bottom plate 810 are integrally formed by stitch welding through the bracket upright plates 830.

[0063] As shown in Figure 2 , Figure 7 In order to improve the overall stability of the frame structure, the lifting crossbeam 210 is additionally arranged between the two longitudinal beams 100, specifically, the lifting crossbeam 210 is connected with the bracket support 300, and the lifting crossbeam 210 protrudes outside the outer upright plate 311 through the through hole 315 of the bracket support 300, the bracket upright plate 830 is provided with the mounting hole 840, the bracket upright plate 830 is nested at both ends of the lifting crossbeam 210, and the lifting crossbeam 210 and the bracket upright plate 830 are fixedly welded. The first bracket 800 comprises the bracket bottom plate 810, the bracket top plate 820 and the at least two bracket upright plates 830, the bracket bottom plate 810 is welded with the bracket top plate 820 and the bracket upright plate 830, the bracket upright plate 830 is provided with the fixing portion 831 and the horizontal portion 832 distributed on both sides of the fixing portion 831 along the extending direction of the longitudinal beam 100, the bracket bottom plate 810 and the bracket top plate 820 are long strip-shaped bent plates 313, which reduce the overall weight under the premise of ensuring the strength, wherein the bracket top plate 820 is a load-bearing plate, the bracket top plate 820 is fixed outside the bracket support 300 through the lifting crossbeam 210, and the horizontal portion 832 of the bracket upright plate 830 and the bracket top plate 820 can provide support force for the battery bracket 500.

[0064] By adding lifting cross beams 210 between the two longitudinal beams 100, the lateral connection stiffness of the frame structure is effectively enhanced, and the overall frame structure's torsional performance is improved. Especially under the action of a heavy battery pack, the bending deformation or local instability phenomenon of the longitudinal beam 100 due to uneven stress can be prevented. The box structure formed by the welding of the bracket bottom plate 810, the top plate, and the upright plate has excellent bending, shearing, and torsional performance, can effectively bear a heavy battery pack, and prevent deformation or fracture caused by vibration or impact. At the same time, the first bracket 800 is arranged along the lifting cross beam 210 at intervals, and each bracket upright plate 830 is provided with a mounting hole 840 and is fixed to the two ends of the lifting cross beam 210 by welding, forming multiple stable support points. This distributed support structure can uniformly transmit the load borne by the battery bracket 500 to the entire frame system, avoiding the safety hazards caused by single-point failure. In addition, the bracket upright plate 830 is provided with a fixed portion 831 and a horizontal portion 832 distributed on both sides of the fixed portion 831 along the extension direction of the longitudinal beam 100, making the adjacent support points of the battery bracket 500 more compact. In addition, the horizontal portion 832 supports the battery bracket 500, reduces the vertical shear force between the battery bracket 500 and the longitudinal beam 100, avoids the stress concentration problem caused by a single stress path, and can effectively prolong the fatigue life of the key connection part.

[0065] In an embodiment of the present application, the clamping plate support 400 further comprises a pad 440 protruding from the inner side of the first mounting plate 410 and / or the second mounting plate 420, the bottom surface of the pad 440 abutting the beam top plate 120, and the first mounting plate 410, the second mounting plate 420 and the pad 440 are respectively provided with threaded holes for assembly bolts.

[0066] As shown in Figure 4 The pad 440 is arranged between the first mounting plate 410 and the second mounting plate 420 and is fixedly connected with the first mounting plate 410 and the second mounting plate 420. When the worker assembles the battery bracket 500 and the clamping plate support 400 on the longitudinal beam 100, one end of the battery bracket 500 can be fixedly connected with the first mounting plate 410, and then the first mounting plate 410 and the second mounting plate 420 are clamped and fixed on the longitudinal beam 100 by bolts. At this time, the bottom surface of the pad 440 abuts the beam top plate 120, and the pad 440 plays a certain supporting role in the vertical direction on the battery bracket 500 and the clamping plate support 400, disperses the vertical stress between the bolts and the longitudinal beam 100, reduces the deformation of the longitudinal beam 100, and improves the connection strength and durability of the clamping plate support and the longitudinal beam 100.

[0067] In addition, the design of the cushion block 440 further simplifies the installation process, and workers can directly use the cushion block 440 to achieve accurate positioning without additional processing or adjustment of the beam top plate 120, thereby greatly saving assembly time and improving work efficiency. Meanwhile, the presence of the cushion block 440 also makes the later maintenance work more convenient. When the clamp support 400 needs to be replaced or repaired, workers can more easily disassemble the bolts and separate the first mounting plate 410 from the second mounting plate 420 without complicated operations on the longitudinal beam 100 itself, thereby reducing maintenance costs.

[0068] In an embodiment of the present application, the frame structure further comprises a bracket cross beam 220, the axis direction of the bracket cross beam 220 is perpendicular to the extension direction of the longitudinal beam 100, and the bracket cross beam 220 is arranged below the longitudinal beam 100 for connecting the battery bracket 500.

[0069] As shown in Figure 2 , Figure 10 , the bracket cross beam 220 connects the battery brackets 500 distributed on both sides of the longitudinal beam 100, enhances the lateral connection stiffness of the frame structure, and improves the torsional performance of the overall frame structure. The bracket cross beam 220 is made of high-strength steel pipe or rectangular steel profile. During assembly, the bracket cross beam 220 is fixedly connected with the first support plate 510 of the battery bracket 500 on both sides of the longitudinal beam 100. Specifically, the side of the first support plate 510 away from the clamp support 400 is provided with a threaded hole, the two ends of the bracket cross beam 220 are provided with threaded holes along the extension direction of the axis, and the two ends of the bracket cross beam 220 are fixedly connected with the first support plate 510 by bolts.

[0070] The bracket cross beam 220 is connected with the battery brackets 500 on both sides of the longitudinal beam 100 along the axis direction to form a lateral support structure, which effectively enhances the structural stiffness of the frame in the lateral direction and significantly improves the torsional capacity of the overall frame under complex working conditions, preventing torsional deformation caused by uneven stress on the left and right sides. The two ends of the bracket cross beam 220 are fixed by bolt connection with the first support plate 510, without welding, which greatly improves the assembly efficiency and the convenience of later maintenance. When replacing parts, the bracket cross beam 220 and the battery bracket 500 can be quickly separated by only removing the relevant bolts, without the need for large-scale disassembly of the overall vehicle structure. In addition, the bracket cross beam 220 connects the battery brackets 500 distributed on both sides of the longitudinal beam 100, so that the originally independent bracket systems form a unified bearing system. This not only improves the local stability of the single battery bracket 500, but also realizes multi-point collaborative bearing, avoiding the problem of structural imbalance caused by single-side overload.

[0071] In an embodiment of the present application, the clamping plate support 400 further comprises a gusset plate 450, which is protrudingly arranged on the inner side of the first mounting plate 410 and the second mounting plate 420, and abuts against the left side plate and the right side plate of the longitudinal beam 100.

[0072] As shown in Figure 4 The gusset plate 450 is made of wear-resistant and pressure-resistant high-strength alloy steel, and is protrudingly arranged on the inner side of the first mounting plate 410 and the second mounting plate 420, which abut against the left side plate and the right side plate of the longitudinal beam 100, and tightly abuts against the left side plate and the right side plate of the longitudinal beam 100, so that the contact area between the clamping plate support 400 and the longitudinal beam 100 is significantly increased. By arranging the gusset plate 450, the installation stability of the clamping plate support 400 on the longitudinal beam 100 can be improved, and the problems of deviation or slipping caused by uneven stress or loose assembly can be prevented; in addition, the pressure can be effectively dispersed, and the local stress concentration phenomenon can be avoided. At the same time, by arranging the gusset plate 450, the clamping plate support 400 can be better fitted with the longitudinal beam 100, the rigid connection between the clamping plate support 400 and the longitudinal beam 100 is enhanced, which helps to improve the bending resistance, shear resistance and torsional resistance of the entire frame structure under complex working conditions, effectively improves the carrying capacity and installation stability of the clamping plate support 400, and improves the adaptability of the clamping plate support 400 and the longitudinal beam 100.

[0073] The embodiment of the present application discloses an engineering vehicle. The engineering vehicle comprises a battery pack and the frame structure of the first aspect, the battery pack is arranged in the battery bracket 500, and the vehicle battery pack is hung on the left and right sides of the longitudinal beam 100 of the frame.

[0074] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields based on the inventive concept of the present application and the content of the specification and drawings are included in the patent protection scope of the present application.

Claims

1. A vehicle frame structure, characterized in that, include: A longitudinal beam assembly comprising two spaced longitudinal beams (100); A crossbeam assembly (200), the two ends of which are fixedly connected to the longitudinal beam (100); Two bracket supports (300) are fixedly connected to the bottom plate (110) of the longitudinal beam (100) in a one-to-one correspondence; Multiple clamping supports (400) are provided at intervals along the extension direction of the longitudinal beam (100). Each clamping support (400) includes a first mounting plate (410) and a second mounting plate (420). The first mounting plate (410) and the second mounting plate (420) are clamped and fixedly connected to the longitudinal beam (100) by fasteners (600). The first mounting plate (410) is located on the outside of the longitudinal beam (100). A battery bracket (500) is provided, one end of which is fixedly connected to the first mounting plate (410), and the other end of which is fixedly connected to the bracket support (300).

2. The frame structure according to claim 1, characterized in that, The bracket support (300) is provided with a mounting part (310) protruding away from the bottom plate (110) of the beam. The mounting part (310) is provided with a through hole (315). The bracket mounting beam (700) passes through the through hole (315) and is fixedly connected to the mounting part (310). The bracket mounting beam (700) has a load-bearing section (710) exposed outside the mounting part (310). The load-bearing section (710) is used to support the battery bracket (500). A bracket mounting plate (730) is provided on the side of the load-bearing section (710) away from the longitudinal beam (100). The battery bracket (500) is fixedly connected to the bracket mounting plate (730).

3. The frame structure according to claim 2, characterized in that, The bracket support (300) includes an outer vertical plate (311), an inner vertical plate (312), and a bent plate (313) connecting the outer vertical plate (311) and the inner vertical plate (312). The outer vertical plate (311) and the inner vertical plate (312) are fixedly arranged at intervals on the inner and outer sides of the beam bottom plate (110). The bracket mounting beam (700) is fixedly connected to the inner vertical plate (312) and the outer vertical plate (311).

4. The frame structure according to claim 2, characterized in that, The bracket support (300) is provided with a plurality of mounting portions (310) along the extension direction of the longitudinal beam (100), and a recess (320) is provided between adjacent mounting portions (310), and the recess (320) and the mounting portion (310) are smoothly connected.

5. The frame structure according to claim 2, characterized in that, The bracket mounting beam (700) has a crossbeam mounting plate (740) at one end away from the bracket mounting plate (730) along its axial direction. The crossbeam mounting plate (740) is an annular steel plate and has multiple threaded holes. The crossbeam mounting plate (740) is welded and fixed to the outer end face of the bracket mounting beam (700).

6. The frame structure according to claim 2, characterized in that, The frame structure also includes a lifting crossbeam (210) and a first bracket (800). The lifting crossbeam (210) passes through the through hole (315) and is fixedly connected to the bracket support (300). The first bracket (800) is located outside the bracket support (300) and is spaced apart along the lifting crossbeam (210). The first bracket (800) is provided with a fixing part (831). The fixing part (831) is provided with horizontal parts (832) on both sides along the extension direction of the longitudinal beam (100). The fixing part (831) is provided with mounting holes (840). The first bracket (800) is fixedly connected to the lifting crossbeam (210) through the mounting holes (840). The horizontal parts (832) are used to support the battery bracket (500).

7. The frame structure according to claim 6, characterized in that, The frame structure also includes a bracket crossbeam (220), the axis of which is perpendicular to the extension direction of the longitudinal beam (100), and the bracket crossbeam (220) is disposed below the longitudinal beam (100) to connect the battery bracket (500) on the outside of the longitudinal beam (100).

8. The frame structure according to any one of claims 1-6, characterized in that, The clamping plate support (400) also includes a pad (440), which protrudes from the inner side of the first mounting plate (410) and / or the second mounting plate (420). The bottom surface of the pad (440) abuts against the top plate (120) of the beam. The first mounting plate (410), the second mounting plate (420) and the pad (440) are respectively provided with threaded holes for mounting bolts.

9. The frame structure according to claim 8, characterized in that, The clamp support (400) also includes a pad (450), which protrudes from the inner side of the first mounting plate (410) and the second mounting plate (420) and abuts against the left and right side plates of the longitudinal beam (100).

10. An engineering vehicle comprising a battery pack and a frame structure as described in any one of claims 1-9, wherein the battery pack is disposed in the battery bracket (500).

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