A frame structure and an engineering vehicle

Abstract

The application relates to a frame structure and an engineering vehicle, and relates to the technical field of vehicle frames.The 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 longitudinally arranged longitudinal beams.The two ends of the cross beam assembly are fixedly connected with the longitudinal beams.The bracket supports are fixedly connected with the beam bottom plates of the longitudinal beams one by one.The plurality of clamping plate supports are arranged at intervals along the longitudinal beam extension direction.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 in clamping mode 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.The frame structure is provided with the clamping plate support and the bracket support for connecting the battery bracket and the longitudinal beam, the connection strength of the battery bracket and the longitudinal beam is improved, and the deformation of the longitudinal beam and the frame structure is avoided.

Description

Technical Field

[0001] This invention relates to the field of vehicle frame technology, specifically to a frame structure and an engineering vehicle. Background Technology

[0002] Engineering vehicles are specialized transportation equipment used in open-pit mining. In actual use, they are often required to be low-cost, have high load capacity, and high work efficiency. Under the backdrop of green, intelligent, and sustainable development strategies, hybrid and pure electric mining dump trucks have occupied a pivotal position in the industry. However, to provide sufficient power for these trucks, it is necessary to equip them with larger and heavier battery packs.

[0003] Battery packs for engineering vehicles can be assembled in two ways: backpack-mounted and side-mounted. In backpack-mounted configurations, the main load is borne directly by the upper wing of the chassis. However, this method reduces the cargo box's loading volume without altering the vehicle's longitudinal length, hindering the loading efficiency of mining dump trucks. Traditional side-mounted battery packs typically use welding or bolting to directly connect the battery bracket to a single side wall of the longitudinal beam, with the main load borne by that single side wall. This method is prone to fatigue fracture due to stress concentration, and the assembly process is relatively complex. For large mining dump trucks with load capacities of tens or hundreds of tons, ordinary side-mounted structures are insufficient to meet strength requirements.

[0004] Therefore, designing a battery pack assembly method that can meet the requirements of high strength has become an urgent problem to be solved. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a frame structure and a mining car.

[0006] In a first aspect, the present invention provides a vehicle frame structure, which adopts the following technical solution:

[0007] To achieve the above objectives, the present invention provides a vehicle frame structure, including a longitudinal beam assembly, a crossbeam assembly, two bracket supports, multiple clamping plate supports, and a battery bracket. The longitudinal beam assembly includes two spaced-apart longitudinal beams. Both ends of the crossbeam assembly are fixedly connected to the longitudinal beams. The bracket supports are fixedly connected to the bottom plates of the longitudinal beams one-to-one. The multiple clamping plate supports are spaced apart along the extension direction of the longitudinal beams. Each clamping plate support includes a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate are clamped and fixedly connected to the longitudinal beams by fasteners. The first mounting plate is disposed on the outer side of the longitudinal beam. One end of the battery bracket is fixedly connected to the first mounting plate, and the other end of the battery bracket is fixedly connected to the bracket support.

[0008] Furthermore, the bracket support is provided with a mounting portion protruding away from the bottom plate of the beam. The mounting portion has a through hole, through which the bracket mounting beam passes and is fixedly connected to the mounting portion. The bracket mounting beam has a load-bearing section exposed outside the mounting portion. The load-bearing section is used to support the battery bracket. A bracket mounting plate is provided on the side of the load-bearing section away from the longitudinal beam. The battery bracket is fixedly connected to the bracket mounting plate.

[0009] Furthermore, the bracket support includes an outer vertical plate, an inner vertical plate, and a bent plate connecting the outer vertical plate and the inner vertical plate. The outer vertical plate and the inner vertical plate are fixedly arranged on the inner and outer sides of the beam bottom plate at intervals. The bracket mounting beam is fixedly connected to the inner vertical plate and the outer vertical plate.

[0010] Furthermore, the bracket support is provided with multiple mounting parts along the extension direction of the longitudinal beam, and adjacent mounting parts are smoothly connected.

[0011] Furthermore, the bracket mounting beam has a crossbeam mounting plate at one end away from the bracket mounting plate along its axial direction. The crossbeam mounting plate is a ring-shaped steel plate with multiple threaded holes. The crossbeam mounting plate is welded and fixed to the outer end face of the bracket mounting beam.

[0012] Furthermore, the vehicle frame structure also includes a lifting crossbeam and a first bracket. The lifting crossbeam passes through the through hole and is fixedly connected to the bracket support. The first bracket is located outside the bracket support and is spaced apart along the lifting crossbeam. The first bracket has a fixing part, and the fixing part has horizontal parts on both sides along the extension direction of the longitudinal beam. The fixing part has mounting holes. The first bracket is fixedly connected to the lifting crossbeam through the mounting holes. The horizontal parts are used to support the battery bracket.

[0013] Furthermore, the vehicle frame structure also includes a bracket crossbeam, the axis of which is perpendicular to the extension direction of the longitudinal beam, and the bracket crossbeam is disposed below the longitudinal beam for connecting the battery bracket on the outside of the longitudinal beam.

[0014] Furthermore, the clamping plate support also includes a pad, which protrudes from the inner side of the first mounting plate and / or the second mounting plate, and the bottom surface of the pad abuts against the top plate of the beam. The first mounting plate, the second mounting plate and the pad are respectively provided with threaded holes for mounting bolts.

[0015] Furthermore, the clamping plate support also includes a pad, which protrudes from the inner side of the first mounting plate and the second mounting plate, and abuts against the left and right side plates of the longitudinal beam.

[0016] Secondly, the present invention provides an engineering vehicle, which adopts the following technical solution:

[0017] An engineering vehicle includes a battery pack and the frame structure described in the first aspect, wherein the battery pack is disposed in the battery bracket.

[0018] The present invention provides a vehicle frame structure and an engineering vehicle, which includes at least one of the following beneficial technical effects:

[0019] By installing clamp supports and bracket supports on the longitudinal beams, one end of the battery bracket is fixed to the outside of the longitudinal beam via the clamp support, while the other end is connected to the bottom plate of the longitudinal beam via the bracket support, forming a "side-bottom" two-way support system. This layout improves the connection strength between the battery bracket and the longitudinal beam, prevents deformation of the longitudinal beam and vehicle frame structure, and distributes the weight and vibration load of the battery pack to multiple key parts of the longitudinal beam, resulting in a better battery arrangement.

[0020] The battery bracket is fixed to the longitudinal beam by setting up clamp supports. The clamp supports can be fixedly connected to the inner and outer plates of the longitudinal beam, and then the battery bracket is installed on the first mounting plate. This allows the load of the battery bracket to be transferred to multiple contact surfaces of the longitudinal beam through the first and second mounting plates, rather than being concentrated on a single side of the longitudinal beam. This design effectively disperses local stress and reduces the risk of fatigue damage to the longitudinal beam caused by concentrated stress.

[0021] By setting up bracket supports and bracket mounting beams, the installation method of the battery bracket is optimized, providing an upward lifting force to the battery bracket, reducing the connection shear force between the battery bracket and the longitudinal beam, further improving the stability and load-bearing capacity of the battery bracket, increasing the installation stability of the battery pack on the vehicle frame, and improving the overall performance and reliability of the vehicle frame structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the vehicle frame provided in an embodiment of the present invention;

[0024] Figure 2 This is a top view schematic diagram of the vehicle frame structure provided in an embodiment of the present invention;

[0025] Figure 3 This is a side view schematic diagram of the vehicle frame structure provided in an embodiment of the present invention;

[0026] Figure 4This is a schematic diagram of the three-dimensional structure of the clamp support provided in an embodiment of the present invention;

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

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the battery holder provided in an embodiment of the present invention;

[0029] Figure 7 This is a side view of the battery holder structure provided in an embodiment of the present invention;

[0030] Figure 8 This is a partial structural schematic diagram of the vehicle frame structure provided in an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the connection structure between the first bracket, the bracket support, and the lifting beam provided in an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the connection structure between the first bracket and the battery bracket provided in an embodiment of the present invention.

[0033] In the diagram, 100 is the longitudinal beam; 110 is the bottom plate of the beam; 120 is the top plate of the beam; 130 is the inner side plate; 140 is the outer side plate; 200 is the crossbeam assembly; 210 is the lifting crossbeam; 220 is the bracket crossbeam; 300 is the bracket support; 310 is the mounting part; 311 is the outer vertical plate; 312 is the inner vertical plate; 313 is the bent plate; 314 is the extension leg; 315 is the through hole; 320 is the recess; 400 is the clamp support; 410 is the first mounting plate; 420 is the second mounting plate; 440 is the pad; 450 is the pad plate; 500 is the pad. 510 Battery bracket; 511 First support plate; 520 Annular groove; 521 Second support plate; 522 Positioning plate; 523 Reinforcing rib plate; 530 L-shaped bracket; 600 Fastener; 700 Bracket mounting beam; 710 Load-bearing section; 720 Groove; 730 Bracket mounting plate; 740 Crossbeam mounting plate; 750 Rib plate; 800 First bracket; 810 Bracket bottom plate; 820 Bracket top plate; 830 Bracket upright plate; 831 Fixing part; 832 Horizontal part; 840 Mounting hole. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 - Appendix Figure 10 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0039] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention discloses a vehicle frame structure, including a longitudinal beam assembly, a crossbeam assembly 200, two bracket supports 300, multiple clamping plate supports 400, and a battery bracket 500. The longitudinal beam assembly includes two longitudinal beams 100 spaced apart. The two ends of the crossbeam assembly 200 are respectively fixedly connected to the longitudinal beams 100. The bracket supports 300 are fixedly connected to the beam bottom plates 110 of the longitudinal beams 100 one-to-one. The multiple clamping plate supports 400 are spaced apart along the extension direction of the longitudinal beams 100. Each clamping plate 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 beams 100 by fasteners. The first mounting plate 410 is disposed on the outside of the longitudinal beams 100. One end of the battery bracket 500 is fixedly connected to the first mounting plate 410, and the other end of the battery bracket 500 is fixedly connected to the bracket support 300.

[0040] Specifically, the longitudinal beam assembly consists of two parallel, spaced-apart box-shaped longitudinal beams 100. Each longitudinal beam 100 includes a top plate 120, a bottom plate 110, and inner and outer plates 130 connecting the top and bottom plates 120 and 110. The top plate 120, bottom plate 110, inner plate 130, and outer plate 140 are welded together to form a quadrilateral continuous structure. The longitudinal beam 100 maintains a rectangular continuous state, mitigating stress concentration caused by abrupt structural changes. The end of the longitudinal beam 100 that is mounted on the gantry frame is designated as the front end of the longitudinal beam 100. The top plate 120 of the front end of the longitudinal beam 100 extends outward and bends downward to form a stepped transformation structure, which simplifies the structure of the front longitudinal beam 100, improves the load-bearing capacity of the longitudinal beam 100, and improves the stress state of the longitudinal beam 100. Furthermore, the connection between the top plate 120, the bottom plate 110 and the left and right side plates is supported by a pad 450 for welding, which enhances the load-bearing capacity and reliability of the longitudinal beam 100.

[0041] The connection direction between the bottom plate 110 and the top plate 120 of the longitudinal beam 100 is set to the vertical direction. The crossbeam assembly 200 is fixed between the longitudinal beams 100 by welding or bolting to form an integral frame structure. The vehicle's battery pack is side-mounted on the outer side plate 140 of the longitudinal beam 100 via a battery bracket 500. 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 abuts against the outer side plate 140, and 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 to the longitudinal beam 100 by fasteners 600. The bracket supports 300 are fixedly installed on the bottom plate 110 of the longitudinal beam 100 one by one. Along the vertical direction, one end of the battery bracket 500 is connected to the clamp support 400, and the other end is fixedly connected to the bracket support 300. The bracket support 300 is used to support and / or install the battery bracket 500.

[0042] Furthermore, the fastener 600 is a bolt, wherein the first mounting plate 410 and the second mounting plate 420 are provided with multiple threaded holes, the highest height of the first mounting plate 410 and the second mounting plate 420 in the vertical direction is higher than the height of the beam top plate 120, and at least one bolt in the vertical direction is installed at a position higher than the beam top plate 120 with the side of the bolt abutting against the beam top plate 120. In addition, the outer side plate 140 and the inner side plate 130 of the longitudinal beam 100 are provided with threaded holes, and the bolt passes through the clamping plate support 400 and the longitudinal beam 100 in sequence. By setting multiple bolts to connect the longitudinal beam 100 and the clamp support 400, the vertical load-bearing capacity of the clamp support 400 is improved, providing a base point for the installation of the battery bracket 500. At the same time, it avoids the destructive operation of the longitudinal beam 100 structure by the traditional welding process, and realizes the quick positioning, adjustment and fixation of the clamp support 400 on the longitudinal beam 100, reducing assembly time and dependence on special equipment. It is especially suitable for the later modification or replacement needs of the battery bracket 500.

[0043] The clamp support 400 is fixedly connected to both the inner plate 130 and the outer plate 140 of the longitudinal beam 100, thereby mounting the battery bracket 500 onto the first mounting plate 410. The clamp support 400 of this invention uses multiple bolts penetrating the inner plate 130 and the outer plate 140 of the longitudinal beam 100, with at least one bolt positioned above and abutting against the top plate 120 of the beam. This allows the load of the battery bracket 500 to be transferred to multiple contact surfaces of the longitudinal beam 100 via the first mounting plate 410 and the second mounting plate 420, rather than being concentrated on a single side of the longitudinal beam 100. Compared to directly mounting the battery bracket 500 onto the outer plate 140 of the longitudinal beam 100, this design effectively disperses local stress and reduces the risk of fatigue damage to the longitudinal beam 100 due to concentrated stress. Furthermore, by bolting the clamp support 400 above the top plate 120, the vertical load-bearing capacity of the clamp support 400 is enhanced.

[0044] By installing clamp supports 400 and bracket supports 300 on the longitudinal beam 100, one end of the battery bracket 500 is fixed to the outside of the longitudinal beam 100 via the clamp supports 400, and the other end is connected to the bottom plate 110 of the longitudinal beam 100 via the bracket supports 300, forming a "side-bottom" two-way support system. This layout distributes the weight and vibration load of the battery pack to multiple key parts of the longitudinal beam 100, significantly improving the overturning resistance and impact resistance of the battery bracket 500.

[0045] In one embodiment of the present invention, 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 passes through the through hole 315 and is fixedly connected to the mounting portion 310. The bracket mounting beam 700 has a load-bearing section 710 exposed outside the mounting portion 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.

[0046] like Figures 3 to 7 As shown, to increase the contact area between the battery bracket 500 and the bracket support 300 and improve the stability of the battery bracket 500 installation, the bracket support 300 is formed with a mounting portion 310 protruding from the side away from the beam bottom plate 110 through stamping or casting processes in the vertical direction. The mounting portion 310 is used to install the battery bracket 500. A through hole 315 is provided in the mounting portion 310, through which the bracket mounting beam 700 passes and is fixedly connected to the mounting portion 310. The bracket mounting beam 700 is a tubular integral casting with high strength and stability.

[0047] The axis of the bracket mounting beam 700 extends toward the adjacent longitudinal beam 100 and is perpendicular to the extension line of the longitudinal beam 100. Furthermore, the bracket mounting beam 700 includes a load-bearing section 710 disposed on the outside of the longitudinal beam 100. The end of the load-bearing section 710 away from the longitudinal beam 100 is provided with a groove 720. The bracket mounting plate 730 is fixedly connected to the groove 720, thereby realizing the fixed connection between the bracket mounting plate 730 and the mounting part 310.

[0048] Specifically, the battery bracket 500 includes a vertically arranged first support plate 510, a horizontally arranged second support plate 520, and an L-shaped bracket 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. The L-shaped support plates are spaced apart on both sides of the first support plate 510 and the second support plate 520 and connected to the first support plate 510 and the second support plate 520, so that the battery bracket 500 is L-shaped. In addition, the first support plate 510 has an annular groove 511 at one end near the mounting part 310. The outer side of the load-bearing section 710 engages with the annular groove 511, thereby realizing the vertical lifting of the battery bracket 500 by the bracket mounting beam 700. In addition, the first bracket and the second support plate 520 are provided with reinforcing ribs 522, which are also connected to the L-shaped support plate. The side of the second support plate 520 near the L-shaped bracket 530 is bent downwards, 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 to the second support plate 520 and the L-shaped support plate. The end of the annular groove 511 away from the mounting part 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 to the groove 720, which can effectively disperse structural stress, improve structural strength and service life. At the same time, there are threaded holes on the circular surface. The bracket mounting plate 730 and the positioning plate 521 are fixedly connected by bolts, thereby realizing the secondary fixation of the battery bracket 500 and the bracket support plate.

[0049] The protruding design of the mounting section 310 provides a more stable support point for the bracket mounting beam 700, keeping the stress point of the bracket mounting beam 700 away from the longitudinal beam 100 body and preventing fatigue cracking of the longitudinal beam 100 due to local stress concentration. Furthermore, the load-bearing section 710 allows the weight of the battery bracket 500 to be distributed more evenly on the bracket mounting beam 700. Compared with existing technologies, this reduces the vertical shear force on the bolts connecting the battery bracket 500 and the longitudinal beam 100, further improving the structural stability and load-bearing capacity. Simultaneously, the annular groove 511 of the first support plate 510 cooperates with the load-bearing section 710 to facilitate the fixed installation of the battery bracket 500 and avoid eccentric loading problems caused by installation errors. The bracket mounting plate 730 provides additional fixing points for the battery bracket 500, enhancing the stability and safety of the battery bracket 500 during installation. In summary, by setting up the mounting section 310 and the bracket mounting beam 700, the installation method of the battery bracket 500 is optimized, the installation stability of the battery pack on the frame is increased, and the overall performance and reliability of the frame structure are improved.

[0050] It should be noted that the present invention does not limit the installation connection method of the bracket mounting beam 700 and the through hole 315, or the connection method of the bracket mounting plate 730 and the groove 720. In one embodiment, the bracket mounting beam 700 and the through hole 315, and the bracket mounting plate 730 and the groove 720 are all fixedly connected by welding.

[0051] In one embodiment of the present invention, 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 disposed on the inner and outer sides of the beam bottom plate 110 at intervals. The bracket mounting beam 700 is fixedly connected to the inner vertical plate 312 and the outer vertical plate 311.

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

[0053] The outer vertical plate 311 and the inner vertical plate 312 are fixedly installed on the inner and outer sides of the beam bottom plate 110 at intervals. This layout not only ensures the symmetry and balance of the bracket support 300, but also significantly improves the overall rigidity and torsional resistance of the bracket support 300 through the symmetrical fixing method. In addition, the introduction of the bent plate 313 not only increases the connection strength between the outer vertical plate 311 and the inner vertical plate 312, but also provides support for the bracket support 300. This design cleverly distributes the load, reduces stress concentration, and thus extends 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, such as Figure 5 , Figure 8As shown, 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 length of the extension foot 314 of the outer vertical plate 311 near the front end of the longitudinal beam 100 is shorter than the length of the extension foot 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. Meanwhile, by setting the extension leg 314 of the outer vertical plate 311 near the front end of the longitudinal beam 100 to be shorter than the extension leg 314 of the inner vertical plate 312, it is easier for the extension leg 314 of the outer vertical plate 311 to precisely align with the beam bottom plate 110 at the front end of the longitudinal beam 100, ensuring the compactness and firmness of the connection. Furthermore, by setting different extension leg 314 lengths for the outer vertical plate 311 and the inner vertical plate 312, stress concentration in the extension leg 314 is reduced when the bracket support 300 is connected to the beam bottom plate 110, ensuring the stability of the connection between the bracket support 300 and the beam bottom plate 110. Further, to increase the strength and stability of the connection between the outer vertical plate 311 and the beam bottom plate 110, the contact area between the outer vertical plate 311 and the beam bottom plate 110 is larger than the contact area between the inner vertical plate 312 and the beam bottom plate 110.

[0055] In one embodiment of the present invention, 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 smoothly connected.

[0056] like Figure 5 , Figure 8 As shown, the bracket support 300 has 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. The recessed portion 320 and the mounting portion 310 are smoothly connected. These mounting portions 310 are connected by a carefully designed smooth transition.

[0057] By providing multiple mounting portions 310, the battery bracket 500 has multiple mounting points, better accommodating the installation of large-size battery modules. This makes the frame more stable when bearing heavy loads, improving the overall rigidity and deformation resistance of the bracket support 300 and the longitudinal beam 100. Furthermore, the smooth transition between the recessed portion 320 and the mounting portion 310 enhances the overall structural strength of the bracket support 300 and optimizes its stress distribution. The recessed portion 320 can reduce the weight of the bracket support 300 to some extent while maintaining sufficient strength and rigidity to meet the stringent requirements of engineering vehicles for the frame structure. In addition, it enhances the smoothness and aesthetics of the bracket support 300, helps reduce stress concentration, and improves 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 one embodiment of the present invention, the vehicle frame structure further 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. 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. The first bracket 800 includes a bracket base plate 810, a bracket top plate 820, and at least two bracket upright plates 830. The bracket top plate 820 and the bracket base plate 810 are welded together as an integral structure through the bracket upright plates 830.

[0063] like Figure 2 , Figure 7 As shown, in order to improve the overall stability of the frame structure, a lifting crossbeam 210 is added between the two longitudinal beams 100. Specifically, the lifting crossbeam 210 is connected to the bracket support 300, and the lifting crossbeam 210 protrudes from the outside of the outer upright plate 311 through the through hole 315 of the bracket support 300. The bracket upright plate 830 is provided with mounting holes 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 welded and fixed together. The first bracket 800 includes a bracket base plate 810, a bracket top plate 820, and at least two bracket upright plates 830. The bracket base plate 810 is welded to the bracket top plate 820 and the bracket upright plates 830 respectively. The bracket upright plates 830 are provided with a fixing part 831 and horizontal parts 832 distributed on both sides of the fixing part 831 along the extension direction of the longitudinal beam 100. The bracket base plate 810 and the bracket top plate 820 are long strip-shaped bent plates 313, which reduces the overall weight while ensuring strength. The bracket top plate 820 is a load-bearing plate. The bracket top plate 820 is fixed to the outside of the bracket support 300 by the lifting crossbeam 210. The horizontal parts 832 of the bracket upright plates 830 and the bracket top plate 820 can provide support for the battery bracket 500.

[0064] By adding a lifting crossbeam 210 between the two longitudinal beams 100, the lateral connection stiffness of the frame structure is effectively enhanced, and the torsional resistance of the overall frame structure is improved. Especially under the heavy load of the battery pack, it can prevent bending deformation or local instability of the longitudinal beams 100 due to uneven stress. The box-type structure formed by welding the bracket base plate 810, top plate, and upright plate has excellent bending, shear, and torsional resistance, and can effectively support the heavy battery pack, preventing deformation or breakage caused by vibration or impact. At the same time, the first bracket 800 is spaced along the lifting crossbeam 210, and each bracket upright plate 830 is provided with mounting holes 840 and is fixed to both ends of the lifting crossbeam 210 by welding, forming multiple stable support points. This distributed support structure can evenly transfer the load borne by the battery bracket 500 to the entire frame system, avoiding safety hazards caused by single-point failure. In addition, the bracket upright plate 830 is provided with a fixing part 831 along the extension direction of the longitudinal beam 100 and horizontal parts 832 distributed on both sides of the fixing part 831, making the adjacent support points of the battery bracket 500 more compact. Furthermore, the horizontal parts 832 provide support for the battery bracket 500, reducing the vertical shear force between the battery bracket 500 and the longitudinal beam 100, avoiding stress concentration problems caused by a single force path, and effectively extending the fatigue life of critical connection parts.

[0065] In one embodiment of the present invention, the clamping plate support 400 further 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.

[0066] like Figure 4 As shown, the pad 440 is disposed between the first mounting plate 410 or the second mounting plate 420 and is fixedly connected to the first mounting plate 410 and the second mounting plate 420. When the workers assemble the battery bracket 500 and the clamp support 400 on the longitudinal beam 100, one end of the battery bracket 500 can be fixedly connected to the first mounting plate 410 first, and then the first mounting plate 410 and the second mounting plate 420 can be clamped and fixed on the longitudinal beam 100 by bolts. At this time, the bottom surface of the pad 440 abuts against the top plate 120 of the beam. The pad 440 provides a certain support for the battery bracket 500 and the clamp support 400 in the vertical direction, 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 clamp support and the longitudinal beam 100.

[0067] Furthermore, the design of the spacer block 440 further simplifies the installation process. Workers can achieve precise positioning directly using the spacer block 440 without additional processing or adjustment of the beam top plate 120, significantly saving assembly time and improving work efficiency. At the same time, the presence of the spacer block 440 also makes subsequent maintenance work more convenient. When it is necessary to replace or repair the clamp support 400, workers can more easily remove the bolts and separate the first mounting plate 410 from the second mounting plate 420 without complex operations on the longitudinal beam 100 itself, thereby reducing maintenance costs.

[0068] In one embodiment of the present invention, the frame structure further includes a bracket crossbeam 220, the axial direction 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 for connecting the battery bracket 500.

[0069] like Figure 2 , Figure 10 As shown, the bracket crossbeam 220 connects the battery brackets 500 distributed on both sides of the longitudinal beam 100, enhancing the lateral connection rigidity of the frame structure and improving the torsional resistance of the overall frame structure. The bracket crossbeam 220 is made of high-strength steel pipe or rectangular steel profile. During assembly, the bracket crossbeam 220 is fixedly connected to the first support plate 510 of the battery brackets 500 on both sides of the longitudinal beam 100. Specifically, the first support plate 510 has a threaded hole on the side away from the clamping plate support 400, and the bracket crossbeam 220 has threaded holes at both ends along its axial extension direction. The two ends of the bracket crossbeam 220 are fixedly connected to the first support plate 510 with bolts.

[0070] The bracket crossbeam 220 connects to the battery brackets 500 on both sides of the longitudinal beam 100 along its axial direction, forming a lateral support structure. This design effectively enhances the structural rigidity of the frame in the lateral direction, significantly improves the torsional resistance of the entire vehicle frame under complex working conditions, and prevents torsional deformation caused by uneven stress on the left and right sides. The two ends of the bracket crossbeam 220 are fixed to the first support plate 510 by bolts, achieving stable installation without welding, greatly improving assembly efficiency and ease of later maintenance. When parts need to be replaced, the bracket crossbeam 220 and battery bracket 500 can be quickly separated simply by removing the relevant bolts, without the need for large-scale disassembly of the entire vehicle structure. Furthermore, the bracket crossbeam 220 connects the battery brackets 500 distributed on both sides of the longitudinal beam 100, transforming the originally independent bracket systems into a unified load-bearing system. This not only improves the local stability of a single battery bracket 500 but also achieves multi-point collaborative load-bearing, avoiding structural imbalance caused by unilateral overload.

[0071] In one embodiment of the present invention, the clamping plate support 400 further 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 side plate and the right side plate of the longitudinal beam 100.

[0072] like Figure 4 As shown, the pad 450 is made of wear-resistant and pressure-resistant high-strength alloy steel. The pad 450 protrudes from the inner surface of the first mounting plate 410, the second mounting plate 420, and the left and right side plates of the longitudinal beam 100, respectively, and is in close contact with the left and right side plates of the longitudinal beam 100, thus significantly increasing the contact area between the clamping plate support 400 and the longitudinal beam 100. By setting the pad 450, the installation stability of the clamping plate support 400 on the longitudinal beam 100 can be improved, preventing displacement or slippage caused by uneven force or loose assembly; in addition, it can effectively distribute pressure and avoid the occurrence of local stress concentration. Meanwhile, by setting the pad 450, the clamp support 400 and the longitudinal beam 100 can fit better, which enhances the rigid connection between the clamp support 400 and the longitudinal beam 100. This helps to improve the bending, shear and torsional resistance of the entire frame structure under complex working conditions, effectively improves the load-bearing capacity and installation stability of the clamp support 400, and improves the compatibility between the clamp support 400 and the longitudinal beam 100.

[0073] This invention discloses an engineering vehicle. The engineering vehicle includes a battery pack and the frame structure described in the first aspect. The battery pack is disposed in the battery bracket 500, and the vehicle battery pack is subsequently mounted sideways on the left and right sides of the frame longitudinal beam 100.

[0074] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A vehicle frame structure, characterized in that, include: A longitudinal beam assembly, the longitudinal beam assembly comprising two longitudinal beams (100) spaced apart. 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) one by one. Each bracket support (300) has a mounting part (310) protruding away from the bottom plate (110). The mounting part (310) has 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). Multiple clamping supports (400) are spaced apart 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) 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).

3. The frame structure according to claim 1, 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.

4. The frame structure according to claim 1, 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).

5. The frame structure according to claim 1, 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 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).

6. The frame structure according to claim 5, 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).

7. 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.

8. The frame structure according to claim 7, 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).

9. An engineering vehicle, comprising a battery pack and a frame structure as described in any one of claims 1-8, wherein the battery pack is disposed in the battery bracket (500).

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