Mounting structure of battery box and oil tank and mining dump truck

Abstract

The invention provides a battery box and oil tank mounting structure and a mining dump truck. The battery box and oil tank mounting structure comprises a frame longitudinal beam; the battery box assembly is connected to the outer side of the frame longitudinal beam through a battery box upper support and a battery box lower support, and the battery box upper support penetrates through the frame longitudinal beam in the transverse direction of the frame longitudinal beam; the oil tank assembly is connected to the inner side of the frame longitudinal beam through an oil tank upper support and an oil tank lower support. The structure equivalently forms a symmetrical force arm in the transverse direction of the longitudinal beam of the frame. The weight of the two sides can be effectively balanced, the inherent unbalance loading problem caused by the fact that the battery box assembly is independently hung on one side is obviously relieved or even eliminated, and the driving stability and the control safety of the vehicle are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mining dump trucks, in particular to a mounting structure of a battery box and an oil tank and a mining dump truck. BACKGROUND

[0002] In the development process of pure electric off-highway mining dump trucks, the fixed mounting structure design of the battery box is particularly critical. As the core energy storage component of the whole vehicle, due to the large volume and high self-weight of the battery box, the stability, reliability and safety of the battery box installation directly affect the comprehensive performance and operation safety of the vehicle.

[0003] At present, the pure electric mining dump trucks on the market usually arrange the battery box in the middle and both sides of the frame. At the same time, the hydraulic system equipped in the off-highway mining dump truck bears the functions of steering, lifting and braking, and its hydraulic oil tank has large capacity and heavy self-weight, which is generally suspended on the left side of the frame longitudinal beam. This leads to the interference between the battery box and the hydraulic oil tank on the same side in space, resulting in a tight arrangement space, which further affects the weight balance of the left and right sides of the vehicle, thereby challenging the steering stability and safety of the whole vehicle. SUMMARY

[0004] To solve the above problems in the prior art, the first aspect of the present application provides a mounting structure of a battery box and an oil tank, comprising: a frame longitudinal beam; a battery box assembly connected to the outer side of the frame longitudinal beam through a battery box upper support and a battery box lower support, wherein the battery box upper support penetrates the frame longitudinal beam along the transverse direction of the frame longitudinal beam; an oil tank assembly connected to the inner side of the frame longitudinal beam through an oil tank upper support and an oil tank lower support.

[0005] Further, the battery box upper support is an integral cast structure, the outer end of which is provided with a groove for suspending and mounting the battery box assembly, and the inner end is a hollow structure inserted into the upper support mounting through hole of the frame longitudinal beam and extending to the inner side of the frame longitudinal beam.

[0006] Further, the battery box assembly is connected to the inner side of the upper part of the battery box assembly through a battery box support rod parallel to the inner side surface of the battery box assembly, the battery box support rod is suspended in the groove of the battery box upper support, and a battery box seat cover is connected above the battery box upper support for limiting the battery box support rod.

[0007] Further, the oil tank upper support is arranged on the inner side of the frame longitudinal beam, and the inner end of the battery box upper support is connected to the hollow structure of the battery box upper support.

[0008] Further, the battery box lower support comprises a battery box lower support transverse plate, The upper end of the battery box lower support horizontal plate is connected with a battery box lower support outer vertical plate and a battery box lower support inner vertical plate which are parallel to each other; The lower end of the battery box lower support horizontal plate is connected with a battery box lower support fixing plate, and a plurality of battery box lower support vertical ribs are fixedly connected between the battery box lower support horizontal plate and the battery box lower support fixing plate. A battery box mounting hole and a battery box lower support flange are arranged on the battery box lower support fixing plate.

[0009] Further, the lower part of the battery box assembly is connected with a battery box shock absorber corresponding to the battery box mounting hole, the battery box shock absorber is attached to the battery box lower support flange of the battery box lower support, and is fastened and connected with the battery box mounting hole through a bolt.

[0010] Further, the oil tank lower support includes an oil tank lower support horizontal plate, the upper end of the oil tank lower support horizontal plate is connected with two oil tank lower support vertical plates which are parallel to each other and are arranged at intervals; The lower end of the oil tank lower support horizontal plate is connected with an oil tank lower support fixing plate, and an oil tank lower support vertical rib is fixedly connected between the oil tank lower support horizontal plate and the oil tank lower support fixing plate. An oil tank mounting hole and an oil tank lower support flange plate are arranged on the oil tank lower support fixing plate.

[0011] Further, the frame longitudinal beam includes a longitudinal beam outer side plate and a longitudinal beam inner side plate which are parallel to each other and are arranged at intervals, the upper and lower sides of the longitudinal beam outer side plate and the longitudinal beam inner side plate are respectively connected with a longitudinal beam upper cover plate and a longitudinal beam lower cover plate to form a stable box structure, and a plurality of rib plates are connected inside the box.

[0012] Further, two battery box upper support mounting holes I are arranged on the longitudinal beam outer side plate, two battery box upper support mounting holes II coaxial with the battery box upper support mounting holes I are arranged on the longitudinal beam inner side plate, a ring-shaped gasket is connected inside the battery box upper support mounting hole I, and a small ring-shaped gasket is connected inside the battery box upper support mounting hole II.

[0013] The second aspect of the present application provides a mine dump truck, which includes the mounting structure of the battery box and the oil tank as described in any one of the above.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. The mounting structure of the battery box and the oil tank of the present application arranges the battery box assembly and the oil tank assembly with relatively large self-weight on the two sides of the frame longitudinal beam, which is equivalent to forming a symmetrical force arm in the transverse direction of the frame longitudinal beam. This can effectively balance the weights on the two sides, significantly reduce or even eliminate the inherent unbalanced load problem caused by the battery box assembly being suspended on one side, and help to improve the driving stability and control safety of the vehicle; At the same time, the battery box upper support transversely penetrates the frame longitudinal beam, which directly transmits the load of the battery box assembly to the whole frame longitudinal beam section, instead of relying on single-sided connection only, thereby enhancing the rigidity and strength of the mounting point.

[0015] 2, the oil tank upper support of the battery box and oil tank mounting structure of the application is connected in the hollow structure of the inner end of the battery box upper support. The weight of the hydraulic oil tank assembly acts on the inner end of the battery box upper support through the oil tank upper support, which generates a certain degree of counteraction with the weight of the outer end battery box assembly. A certain pre-tightening effect can be formed on the battery box upper support penetrating the frame longitudinal beam, which is more stable when bearing complex load and reduces potential shaking, further optimizing the stress state of the structure.

[0016] 3, the battery box damper of the battery box and oil tank mounting structure of the application forms a vibration isolation layer between the battery box assembly and the frame longitudinal beam, which can effectively attenuate and filter out high-frequency vibration and instantaneous impact transmitted from the frame longitudinal beam. It can effectively prevent the internal structure of the battery cell from being damaged and the connection point from being loose, which is crucial to ensuring the safety of the battery pack and prolonging its cycle life.

[0017] 4, the battery box upper support and the frame longitudinal beam of the battery box and oil tank mounting structure of the application are provided with a gap to provide a certain range of floating adjustment amount to ensure that the relative matching size of the upper and lower mounting points can be met. At the same time, the ring gasket and the small ring gasket are used to fill the gap, and full penetration welding is realized between the battery box upper support and the frame longitudinal beam to ensure the structural strength, so that the pressure of the battery box upper support can be transmitted to the whole frame longitudinal beam, avoiding stress concentration. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic diagram of the battery box and oil tank mounting structure of the application; Fig. 2 is a partial sectional view of the battery box and oil tank mounting structure of the application; Fig. 3 is an exploded view of the battery box and oil tank mounting structure of the application; Fig. 4 is a structural schematic diagram of the battery box upper support of the application; Fig. 5 is a structural schematic diagram of the battery box lower support of the application; Fig. 6 is a structural schematic diagram of the hydraulic oil tank lower support of the application; In the drawings: 1. battery box assembly; 11. battery box support rod; 12. battery box shock absorber; 2. frame rail; 21. rail outer plate; 211. battery box upper support mounting hole I; 22. rail inner plate; 221. battery box upper support mounting hole II; 23. rail upper cover plate; 24. rail lower cover plate; 25. large ring row pad plate; 26. small ring row pad plate; 3. oil tank assembly; 31. oil tank support rod; 32. oil tank shock absorber; 4. battery box upper support; 41. battery box upper support mounting threaded hole; 42. sealing plate; 5. battery box lower support; 51. battery box lower support horizontal plate; 52. battery box lower support fixed plate; 53. battery box lower support flange; 54. battery box lower support vertical rib; 55. battery box lower support outer vertical plate; 56. battery box lower support inner vertical plate; 6. oil tank upper support; 7. oil tank lower support; 71. oil tank lower support horizontal plate; 72. oil tank lower support vertical plate; 73. oil tank lower support fixed plate; 74. oil tank lower support flange plate; 75. oil tank lower support vertical rib; 8. battery box seat cover; 9. oil tank seat cover. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] REFERENCE Figs. 1-2 As shown in the drawings, the present application provides a mounting structure of a battery box and an oil tank, comprising: a frame rail 2; a battery box assembly 1 connected to the outer side of the frame rail 2 through a battery box upper support 4 and a battery box lower support 5, wherein the battery box upper support 4 penetrates the frame rail 2 along the transverse direction of the frame rail 2; and an oil tank assembly 3 connected to the inner side of the frame rail 2 through an oil tank upper support 6 and an oil tank lower support 7.

[0021] In the present embodiment, the battery box assembly 1 and the oil tank assembly 3 with relatively large self-weight are arranged on the two sides of the frame rail 2 respectively, and the structure is equivalent to a symmetrical force arm in the transverse direction of the frame rail 2. This layout can effectively balance the weights on the two sides, significantly reduce or even eliminate the inherent unbalanced load problem caused by the single suspension of the battery box assembly 1 on one side, and is helpful to improve the driving stability and control safety of the vehicle. The battery box upper support 4 penetrates the frame rail 2 in the transverse direction, which directly transmits the load of the battery box assembly 1 to the entire cross section of the frame rail 2, rather than relying on single-sided connection, thereby enhancing the rigidity and strength of the mounting point.

[0022] In the above embodiments, two embodiments are listed to realize the above technical solutions: The embodiment one discloses a mounting structure of a battery box and an oil tank, comprising: a frame longitudinal beam 2; a battery box assembly 1 connected to the outer side of the frame longitudinal beam 2 through a battery box upper support 4 and a battery box lower support 5, wherein the battery box upper support 4 penetrates the frame longitudinal beam 2 along the transverse direction of the frame longitudinal beam 2; and an oil tank assembly 3 connected to the inner side of the frame longitudinal beam 2 through an oil tank upper support 6 and an oil tank lower support 7.

[0023] As shown in the reference Fig. 3 The frame longitudinal beam 2 comprises a longitudinal beam outer side plate 21 and a longitudinal beam inner side plate 22 arranged in parallel and at intervals, and the upper and lower sides of the longitudinal beam outer side plate 21 and the longitudinal beam inner side plate 22 are respectively connected with a longitudinal beam upper cover plate 23 and a longitudinal beam lower cover plate 24 to form a stable box structure, and a plurality of rib plates are connected inside the box.

[0024] The longitudinal beam outer side plate 21 is provided with two battery box upper support mounting holes Ⅰ 211, and the longitudinal beam inner side plate 22 is provided with two battery box upper support mounting holes Ⅱ 221 coaxial with the battery box upper support mounting holes Ⅰ 211, the inner side of the battery box upper support mounting holes Ⅰ 211 is connected with a ring-shaped backing plate 25, and the inner side of the battery box upper support mounting holes Ⅱ 221 is connected with a small ring-shaped backing plate 26.

[0025] As shown in the reference Fig. 4 The battery box upper support 4 is an integral cast structure, the outer end of the battery box upper support 4 is provided with a groove for suspending and mounting the battery box assembly 1, and the inner end is a hollow structure, which is inserted into the battery box upper support mounting hole of the frame longitudinal beam 2 and extends to the inner side of the frame longitudinal beam 2. The outermost end of the hollow structure is connected with a sealing plate 42.

[0026] The outer diameters of the mounting points on the hollow structure of the battery box upper support 4 are respectively smaller than those of the battery box upper support mounting holes Ⅰ 211 and the battery box upper support mounting holes Ⅱ 221, and the gap therebetween is 6 mm. The ring-shaped backing plate 25 on the inner side of the battery box upper support mounting holes Ⅰ 211 and the small ring-shaped backing plate 26 on the inner side of the battery box upper support mounting holes Ⅱ 221 are used to fill the gap, the battery box upper support 4 and the frame longitudinal beam 2 are welded to realize full penetration welding, the structural strength is guaranteed, the pressure of the battery box upper support 4 can be transmitted to the whole frame longitudinal beam 2, and stress concentration is avoided. The gap provided at the same time can provide a certain range of floating adjustment under the condition that the battery box lower support 5 is fixed at the mounting point, so that the relative matching size of the upper and lower mounting points can be guaranteed.

[0027] The battery box assembly 1 is connected with a battery box support rod 11 parallel to the inner side of the battery box assembly 1, the battery box support rod 11 is suspended in the groove of the battery box upper support 4, and the battery box upper support 4 is connected with a battery box seat cover plate 81 above for limiting the battery box support rod 11.

[0028] As shown in the reference Fig. 5As shown, the battery box lower support 5 comprises a battery box lower support transverse plate 51, and the upper end of the battery box lower support transverse plate 51 is connected with a battery box lower support outer vertical plate 55 and a battery box lower support inner vertical plate 56 which are parallel to each other and arranged at intervals; wherein the battery box lower support outer vertical plate 55 and the battery box lower support inner vertical plate 56 are arranged perpendicularly to the battery box lower support transverse plate 51. The battery box lower support outer vertical plate 55 and the battery box lower support inner vertical plate 56 jointly constitute a U-shaped groove for accommodating the frame longitudinal beam 2. During installation, the battery box lower support outer vertical plate 55 and the battery box lower support inner vertical plate 56 are respectively welded on both sides of the frame longitudinal beam 2. This structure has high bending and torsional stiffness, and can effectively resist the great vertical and lateral impact force generated by the self-weight of the battery box assembly 1 and the jolt of the vehicle.

[0029] The lower end of the battery box lower support transverse plate 51 is connected with a battery box lower support fixing plate 52, and a plurality of battery box lower support vertical bars 54 are fixedly connected between the battery box lower support transverse plate 51 and the battery box lower support fixing plate 52; the battery box lower support fixing plate 52 is provided with a plurality of battery box mounting holes and a battery box lower support flange 53. Among them, the battery box lower support fixing plate 52 is perpendicular to the battery box lower support transverse plate 51, and the battery box lower support vertical bars 54 are connected between adjacent battery box mounting holes on the battery box lower support fixing plate 52 to improve the structural strength of the battery box lower support 5. In this embodiment, the number of battery box mounting holes is 4, and the number of battery box lower support vertical bars 54 is 3.

[0030] The lower part of the battery box assembly 1 is connected with a battery box shock absorber 12 corresponding to the mounting hole, which is attached to the battery box lower support flange 53 of the battery box lower support 5 and is fastened and connected with the mounting hole through bolts. The battery box shock absorber 12 forms a vibration isolation layer between the battery box assembly 1 and the frame longitudinal beam 2, which can effectively attenuate and filter out high-frequency vibrations and instantaneous impacts transmitted from the frame longitudinal beam 2. It can effectively prevent the internal structure of the battery cell from being damaged and the connection point from being loose, which is crucial to ensuring the safety of the battery pack and prolonging its cycle life.

[0031] Reference Fig. 6 As shown, the oil tank upper support 6 is arranged on the inner side of the frame longitudinal beam 2 and is welded on the longitudinal beam inner side plate 22. Specifically, the inner end of the oil tank upper support 6 is welded on the longitudinal beam inner side plate 22, and the outer end is provided with a recess for suspending and installing the hydraulic oil tank assembly 3. The upper inner side of the hydraulic oil tank assembly 3 is connected with a hydraulic oil tank support rod 31 parallel to the inner side of the hydraulic oil tank assembly 3, which is suspended in the recess of the oil tank upper support 6. An upper cover oil tank cover plate 91 is connected above the oil tank upper support 6 for limiting the hydraulic oil tank support rod 31.

[0032] The oil tank lower support 7 comprises an oil tank lower support horizontal plate 71, the upper end of the oil tank lower support horizontal plate 71 is connected with oil tank lower support vertical plates 72 and oil tank lower support fixed plates 73 which are parallel and spaced apart; the lower end of the oil tank lower support horizontal plate 71 is connected with an oil tank lower support flange plate 74 and an oil tank lower support vertical rib 75 which is fixedly connected between the oil tank lower support horizontal plate 71 and the oil tank lower support flange plate 74; the oil tank lower support fixed plate 73 is provided with an oil tank mounting hole and the oil tank lower support flange plate 74. The lower part of the hydraulic oil tank assembly 3 is connected with an oil tank shock absorber 32 corresponding to the oil tank mounting hole, the oil tank shock absorber 32 is attached to the oil tank lower support flange plate 74 of the oil tank lower support 7 and is fastened and connected with the oil tank mounting hole through bolts.

[0033] During installation, the battery tank support rod 11 at the upper part of the battery tank assembly 1 falls into the groove of the battery tank upper support seat 4, the battery tank seat cover 8 is connected with the battery tank upper support mounting screw hole 41 on the battery tank upper support seat 4 through bolts; the four battery tank shock absorbers 12 at the lower part of the battery tank assembly 1 are attached to the battery tank lower support flange 53 of the battery tank lower support 5 and are fastened and connected with the battery tank lower support 5 through bolts. The hydraulic oil tank support rod 31 at the upper part of the hydraulic oil tank assembly 3 falls into the groove of the oil tank upper support 6, the oil tank seat cover 9 is fastened and connected with the oil tank upper support 6 through bolts; the two hydraulic oil tank shock absorbers 32 at the lower part of the hydraulic oil tank assembly 3 are attached to the oil tank lower support flange plate 74 of the oil tank lower support 7 and are fastened and connected with the oil tank lower support 7 through bolts.

[0034] The second embodiment discloses a mounting structure of a battery tank and an oil tank, which is different from the above-mentioned embodiments in that the oil tank upper support 6 is arranged inside the frame longitudinal beam 2 and the inner end of the battery tank upper support 4 is a hollow structure. Specifically, the battery tank upper support 4 penetrates the frame longitudinal beam 2 and is welded and connected, and the opening of the hollow structure at the inner end is located inside the frame longitudinal beam 2. The oil tank upper support 6 is inserted into the hollow structure at the inner end of the battery tank upper support 4 and is welded and connected therewith. The weight of the hydraulic oil tank assembly 3 acts on the inner end of the battery tank upper support 4 through the oil tank upper support 6, which generates a certain degree of reverse action with the weight of the battery tank assembly 1 at the outer end. A certain pre-tightening effect can be formed on the battery tank upper support 4 which penetrates the frame longitudinal beam 2, so that it is more stable when bearing complex loads and potential shaking is reduced, further optimizing the stress state of the structure.

[0035] The application also provides a mine dump truck comprising the above-mentioned mounting structure of a battery tank and an oil tank.

[0036] The foregoing presents and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mounting structure for a battery box and a fuel tank, characterized in that, include: Frame longitudinal beams (2); The battery box assembly (1) is connected to the outside of the frame longitudinal beam (2) via the upper battery box support (4) and the lower battery box support (5), wherein the upper battery box support (4) passes through the frame longitudinal beam (2) in the transverse direction. The fuel tank assembly (3) is connected to the inner side of the longitudinal beam (2) of the frame via the upper fuel tank support (6) and the lower fuel tank support (7).

2. The mounting structure for the battery box and fuel tank according to claim 1, characterized in that, The upper support (4) of the battery box is an integral cast structure. Its outer end is provided with a groove for suspending the battery box assembly (1), and its inner end is a hollow structure. It is inserted into the upper support mounting hole of the longitudinal beam (2) of the vehicle frame and extends to the inner side of the longitudinal beam (2).

3. The mounting structure for the battery box and fuel tank according to claim 2, characterized in that, The battery box assembly (1) is connected to the inner side of the upper part of the battery box assembly (1) and is parallel to its inner side. The battery box support rod (11) is suspended in the groove of the upper support (4) of the battery box. The upper support (4) of the battery box is connected to the battery box cover (8) for limiting the position of the battery box support rod (11).

4. The mounting structure for the battery box and fuel tank according to claim 2, characterized in that, The upper support (6) of the fuel tank is arranged inside the longitudinal beam (2) of the vehicle frame, and the inner end connected to the upper support (4) of the battery box is a hollow structure.

5. The mounting structure for the battery box and fuel tank according to claim 1, characterized in that, The lower support (5) of the battery box includes a lower support horizontal plate (51) of the battery box. The upper end of the horizontal plate (51) of the lower support of the battery box is connected to the outer vertical plate (55) and the inner vertical plate (56) of the lower support of the battery box, which are parallel to each other. The lower end of the battery box lower support horizontal plate (51) is connected to the battery box lower support fixing plate (52), and a plurality of battery box lower support vertical ribs (54) are fixedly connected between the battery box lower support horizontal plate (51) and the battery box lower support fixing plate (52). The battery box lower support fixing plate (52) is provided with battery box mounting holes and battery box lower support flange (53).

6. The mounting structure for the battery box and fuel tank according to claim 5, characterized in that, The lower part of the battery box assembly (1) is connected to a battery box shock absorber (12) corresponding to the battery box mounting hole. The battery box shock absorber (12) is attached to the battery box lower support flange (53) of the battery box lower support (5) and is fastened to the battery box mounting hole by bolts.

7. The mounting structure for the battery box and fuel tank according to claim 1, characterized in that, The lower support of the oil tank (7) includes a horizontal plate (71) of the lower support of the oil tank, and two parallel and spaced vertical plates (72) of the lower support of the oil tank are connected to the upper end of the horizontal plate (71). The lower end of the horizontal plate (71) of the lower support of the oil tank is connected to the lower support fixing plate (73) of the oil tank, and the lower support vertical rib (75) of the oil tank is fixedly connected between the horizontal plate (71) of the lower support of the oil tank and the lower support fixing plate (73). The lower support fixing plate (73) of the oil tank is provided with an oil tank mounting hole and an oil tank lower support flange plate (74).

8. The mounting structure for the battery box and fuel tank according to claim 1, characterized in that, The frame longitudinal beam (2) includes parallel and spaced-apart outer longitudinal beam plates (21) and inner longitudinal beam plates (22). The upper and lower sides of the outer longitudinal beam plates (21) and inner longitudinal beam plates (22) are respectively connected to the upper longitudinal beam cover plate (23) and the lower longitudinal beam cover plate (24) to form a stable box structure. Several stiffening plates are connected inside the box.

9. The mounting structure for the battery box and fuel tank according to claim 8, characterized in that, The outer side plate (21) of the longitudinal beam of the vehicle frame is provided with two battery box upper support mounting holes I (211), and the inner side plate (22) of the longitudinal beam is provided with two battery box upper support mounting holes II (221) coaxial with the battery box upper support mounting holes I (211). An annular pad (25) is connected to the inner side of the battery box upper support mounting hole I (211), and a small annular pad (26) is connected to the inner side of the battery box upper support mounting hole II (221).

10. A mining dump truck, characterized in that, The mounting structure includes the battery box and fuel tank as described in any one of claims 1-9.

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