Axle housing and dumper

Abstract

The invention provides an axle housing and a dumper, and relates to the technical field of transportation tools. The axle housing comprises a housing body, a mounting frame, a suspension cylinder seat and an arc structure, the mounting frame is arranged on the outer wall of the housing body and located on the side, in the first direction, of the housing body, and at least one side, in the second direction, of the mounting frame is provided with a first tip part; the suspension cylinder seat is arranged on the outer wall of the shell and located on the other side, in the first direction, of the shell, and at least one side, in the second direction, of the suspension cylinder seat is provided with a second tip part. At least one of the first tip part and the second tip part is connected to the outer wall of the shell through an arc structure; the first direction, the second direction and the axial direction of the shell are perpendicular to one another in pairs. By changing the geometrical shape and converting sharp corner connection into round corner connection, the stress distribution of the arc structure is smoother, the stress of the first tip part and the second tip part is gradually transited to the outer wall of the shell from the arc structure, the stress distribution is more uniform, the local stress is prevented from being too high, and the stress concentration coefficient is reduced.

Description

Technical Field

[0001] The present invention generally relates to the technical field of transportation vehicles, and in particular to an axle housing and a dump truck. Background Art

[0002] Mining dump trucks, as heavy-duty engineering vehicles, are widely used in harsh working conditions such as mines and construction sites. As a key component of the vehicle, the axle housing structure primarily performs important functions, such as transmitting power, supporting the vehicle's weight, and withstanding various loads imposed by complex road conditions.

[0003] Existing technologies optimize the stress distribution of axle housings through topological optimization and bionic structural design. However, due to the special working conditions of mining vehicles, conventional optimization methods are difficult to simultaneously meet the requirements of lightweight, low cost, and high reliability. The existing axle housing structures mainly have the following problems:

[0004] 1. Existing mining dump truck axle housings generally utilize traditional welded structures. While this ensures basic strength, improper structural design leads to excessively high local stresses, which can easily lead to stress concentration at the joints. For example, at the junctions between the axle housing and the wheels, and at the suspension system, stress levels are significantly higher than at other locations due to sudden changes in geometry and concentrated loads. This exposes these areas to long-term high stress, which can easily lead to fatigue cracks. This in turn damages the axle housing structure, severely impacting its service life and affecting the normal operation of the vehicle. Therefore, as mining dump trucks develop towards larger tonnage and longer lifespans, the high stress and high weight of traditional axle housings are becoming increasingly prominent.

[0005] 2. To meet load-bearing capacity requirements, the material needs to possess high strength, while also possessing good toughness to withstand impact loads and fatigue damage under complex road conditions. However, existing materials often struggle to balance these two aspects, failing to simultaneously meet the high strength and toughness requirements, thus limiting the overall performance of the axle housing structure.

[0006] 3. Regarding the manufacturing process of the axle housing, traditional welding processes present certain difficulties in quality control. Post-weld heat treatment processes also struggle to ensure uniformity, potentially leading to performance degradation in certain areas and impacting the overall performance of the axle housing. Summary of the Invention

[0007] The present invention provides an axle housing and a dump truck, which reduce stress concentration and improve structural strength.

[0008] According to a first aspect of the present invention, there is provided an axle housing, comprising:

[0009] case;

[0010] a mounting bracket, disposed on an outer wall of the housing and located on one side of the housing along a first direction, wherein at least one side of the mounting bracket along a second direction is provided with a first tip portion;

[0011] a suspension cylinder seat, disposed on the outer wall of the housing and located on the other side of the housing along the first direction, wherein at least one side of the suspension cylinder seat along the second direction is provided with a second tip portion;

[0012] an arc structure, wherein at least one of the first tip portion and the second tip portion is connected to the outer wall of the housing through the arc structure;

[0013] The first direction, the second direction and the axial direction of the housing are perpendicular to each other.

[0014] In some embodiments, the arc structure includes an arc portion and a filling portion, and the arc portion is provided on the outer wall of the shell;

[0015] Wherein, at least one of the first tip portion and the second tip portion is connected to the arc portion through the filling portion.

[0016] In some embodiments, along the axial direction of the housing, the width of the arc portion is greater than the width of the first tip portion;

[0017] And / or, along the axial direction of the housing, the width of the arc portion is greater than the width of the second tip portion.

[0018] In some embodiments, the height of the arc portion protruding from the outer wall of the shell is equal to the height of the first tip portion protruding from the outer wall of the shell;

[0019] And / or, the height of the arc portion protruding from the outer wall of the shell is equal to the height of the second tip portion protruding from the outer wall of the shell.

[0020] In some embodiments, at least one of the first tip portion and the second tip portion is provided with a first inclined surface, the arc portion is provided with a second inclined surface corresponding to the first inclined surface, and the first inclined surface and the second inclined surface are inclined in opposite directions relative to the first direction;

[0021] Wherein, the filling portion is arranged between the first inclined surface and the second inclined surface.

[0022] In some embodiments, the angle between the first inclined surface and the second inclined surface is greater than or equal to 60°.

[0023] In some embodiments, the arc portion includes:

[0024] An arc body is provided on the outer wall of the shell;

[0025] a transition portion, disposed on a side of the arc body facing the first tip portion, the second inclined surface disposed on a side of the transition portion facing the first tip portion, and the first tip portion connected to the arc body through the filling portion;

[0026] Wherein, along the axial direction of the shell, the width of the transition portion is smaller than the width of the arc body.

[0027] In some embodiments, the mounting bracket includes:

[0028] The cover plate and the vertical plate are arranged along the second direction and are parallel and spaced apart, and the cover plate is connected to the outer wall of the shell;

[0029] Two first side plates are arranged in parallel and spaced apart along the axial direction of the shell, and the first side plates are connected to the outer wall of the shell;

[0030] a first mounting plate and a bearing seat, wherein the first mounting plate is located on a side of the first side plate away from the housing, one side of the first mounting plate is respectively connected to the cover plate, the vertical plate and the first side plate, and the other side is provided with the bearing seat;

[0031] The first tip portion is provided on at least one side of the first side plate along the second direction, and the first tip portion is provided on one side of the first side plate along the first direction and facing the housing.

[0032] In some embodiments, a circular arc transition structure is provided on a side of the cover plate facing the housing.

[0033] In some embodiments, the suspension cylinder mount includes:

[0034] two second side plates, distributed along the axial direction of the shell and connected to the outer wall of the shell;

[0035] Two connecting plates, arranged along the first direction and disposed between the two second side plates, one of the two connecting plates being connected to the outer wall of the housing via a second mounting plate;

[0036] The second side plate is provided with an arc notch on at least one side along the second direction, so that the second side plate forms the second tip portion along the first direction and on one side facing the outer wall of the shell.

[0037] In some embodiments, a reinforcement structure is further included, wherein the reinforcement structure is provided on the inner wall of the shell;

[0038] The reinforcement structure includes at least one first reinforcement rib, multiple reinforcement groups and multiple second reinforcement ribs. The shell is provided with a through hole, and the multiple reinforcement groups are located on both sides of the through hole along the axial direction of the shell. The first reinforcement rib extends along the axial direction of the shell and is arranged between adjacent reinforcement groups; the reinforcement group includes multiple annular reinforcement ribs, and the multiple annular reinforcement ribs are distributed along the axial direction of the shell and arranged along the circumference of the shell. The second reinforcement rib is arranged along the axial direction of the shell and between two adjacent annular reinforcement ribs.

[0039] In some embodiments, along the axial direction of the shell, the sum of the length of at least one first reinforcing rib and the lengths of a plurality of second reinforcing ribs is equal to the length of the shell.

[0040] According to a second aspect of the present invention, an embodiment of the present invention further provides a dump truck comprising the above-mentioned axle housing.

[0041] One embodiment of the present invention has the following advantages or beneficial effects:

[0042] The bridge housing provided by the present invention has a peaked stress distribution at the first and second tip portions, resulting in relatively high local stress. This reduces the material's yield capacity due to stress concentration. At least one of the first and second tip portions is connected to the outer wall of the housing via an arc structure. By changing the geometric shape, the sharp-angle connection is converted to a rounded-angle connection, resulting in a smoother stress distribution at the arc structure. The stress at the first and second tip portions gradually transitions from the arc structure to the outer wall of the housing, making the stress distribution more uniform, avoiding excessive local stress, and reducing the stress concentration factor. Furthermore, under the same load, the arc structure has a stronger load-bearing capacity. The two tip portions are connected to the outer wall of the housing via the arc structure, which increases the effective load-bearing area of ​​the material, thereby improving the overall strength and toughness of the housing.

[0043] The dump truck provided by the embodiment of the present invention improves and optimizes the local structure of the bridge housing according to the stress distribution of the bridge housing, and can meet the lightweight requirements without reducing the strength and rigidity of the bridge housing, thereby improving the economy and reliability of the mining dump truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] For a better understanding of the present invention, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present invention. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. The above and other features and advantages of the present invention will become more apparent by describing in detail its exemplary embodiments with reference to the accompanying drawings.

[0045] in:

[0046] Figure 1 The structure of the bridge housing according to one embodiment of the present invention is shown. Figure 1 ;

[0047] Figure 2 The structure of the bridge housing according to one embodiment of the present invention is shown. Figure 2 ;

[0048] Figure 3 The structure of the bridge housing according to one embodiment of the present invention is shown. Figure 3 ;

[0049] Figure 4 The figure shows a schematic structural diagram of the arc structure in the axle housing according to one embodiment of the present invention;

[0050] Figure 5 It shows a schematic structural diagram of a mounting frame in an axle housing according to an embodiment of the present invention;

[0051] Figure 6 Shown is Figure 5 A local enlarged view at point A;

[0052] Figure 7 The figure shows a schematic structural diagram of a cover plate in an axle housing according to an embodiment of the present invention;

[0053] Figure 8 The figure shows a schematic structural diagram of a cylinder suspension seat in an axle housing according to an embodiment of the present invention;

[0054] Figure 9 The figure shows a schematic structural diagram of the second side plate in the axle housing according to an embodiment of the present invention;

[0055] Figure 10 Shown is Figure 8 A partial enlarged view at point B;

[0056] Figure 11 The diagram shows the structure of the first arc structure in the bridge housing according to one embodiment of the present invention. Figure 1 ;

[0057] Figure 12 The diagram shows the structure of the first arc structure in the bridge housing according to one embodiment of the present invention. Figure 2 ;

[0058] Figure 13 The figure shows the structure of the second arc structure in the bridge housing according to one embodiment of the present invention. Figure 1 ;

[0059] Figure 14 The figure shows the structure of the second arc structure in the bridge housing according to one embodiment of the present invention. Figure 2 ;

[0060] Figure 15 Shown is a flow chart of a bridge housing stress control method according to an embodiment of the present invention.

[0061] The description of the accompanying drawings is as follows:

[0062] 1. Shell; 2. Mounting frame; 3. Cylinder suspension base; 4. Arc structure; 5. Reinforced structure;

[0063] 10. Through hole;

[0064] 20. First tip portion; 201. First inclined surface;

[0065] 21. Cover plate; 210. Arc transition structure; 211. First side edge; 212. Second side edge; 213. Third side edge; 22. First side plate; 23. First mounting plate; 24. Bearing seat; 25. Vertical plate;

[0066] 30. Second tip portion; 31. Second side plate; 311. Arc notch; 32. Connecting plate; 33. Second mounting plate;

[0067] 41. Arc portion; 410. Second inclined surface; 411. Arc body; 412. Transition portion;

[0068] 42. Filling part;

[0069] 51. First reinforcement rib; 52. Reinforcement group; 521. Annular reinforcement rib; 53. Second reinforcement rib. DETAILED DESCRIPTION

[0070] The following will be combined with the accompanying drawings in the exemplary embodiments of the present invention to clearly and completely describe the technical solutions in the exemplary embodiments of the present invention. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present invention.

[0071] In the description of the present invention, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" or "an" object is also intended to mean one of a possible plurality of such objects.

[0072] Unless otherwise specified or explained, the terms "connect," "fixed," etc. should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; and "connected" may refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0073] Furthermore, in the description of the present invention, it should be understood that the directional words such as "upper", "lower", "inner", and "outer" described in the exemplary embodiments of the present invention are described based on the perspectives shown in the accompanying drawings and should not be understood as limiting the exemplary embodiments of the present invention. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", or "inner", "outer", but can also be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0074] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0075] This embodiment provides a bridge housing, such as Figure 1-Figure 2 As shown, the axle housing includes a housing 1, a mounting bracket 2, and a suspension cylinder seat 3. The mounting bracket 2 is arranged on the outer wall of the housing 1 and is located on one side of the housing 1 along a first direction. The mounting bracket 2 is provided with a first tip portion 20 on at least one side along a second direction. The suspension cylinder seat 3 is arranged on the outer wall of the housing 1 and is located on the other side of the housing 1 along the first direction. The suspension cylinder seat 3 is provided with a second tip portion 30 on at least one side along the second direction.

[0076] Exemplarily, the shape of the bridge housing is similar to a cylindrical structure, the bridge housing has at least one horizontal plane, the first direction and the second direction are two directions perpendicular to each other in the horizontal direction, the first direction is marked with D1, the second direction is marked with D2, the horizontal plane and the axial direction of the bridge housing are arranged perpendicularly, the axial direction of the bridge housing is marked with D3, wherein the first direction, the second direction and the axial direction of the housing 1 are perpendicular to each other.

[0077] For example, the housing 1 is provided with an axial hole along the axial direction of the housing 1, and the axial hole is mainly used to install key components such as the half-axle sleeve and the main reducer. These components are connected to the bridge housing through the axial hole to transmit power and support the wheels.

[0078] Exemplarily, the mounting frame 2 can also be called an A-type frame. The mounting frame 2 has a first arc groove along the first direction and on one side facing the outer wall of the shell 1, so that the inner side of the mounting frame 2 is adapted to the outer wall of the shell 1 to ensure the installation and fit of the outer wall of the shell 1.

[0079] Exemplarily, the suspension cylinder seat 3 has a second arc groove along the first direction and on one side facing the outer wall of the shell 1, so that the inner side of the suspension cylinder seat 3 is adapted to the outer wall of the shell 1 to ensure installation and fit with the outer wall of the shell 1.

[0080] Mounting bracket 2 is provided with a first tip portion 20 on at least one side along the second direction, forming a sharp angle relative to mounting bracket 2. Cylinder mount 3 is provided with a second tip portion 30 on at least one side along the second direction, forming a sharp angle relative to cylinder mount 3. Stress distribution at first tip portion 20 and second tip portion 30 is uneven, leading to a sharp increase in local stress. For example, when housing 1 is subjected to tensile or bending loads, stress at first tip portion 20 and second tip portion 30 will be significantly higher than in other areas, potentially leading to fatigue or fracture between housing 1, mounting bracket 2, and cylinder mount 3.

[0081] To solve this problem, Figure 1-Figure 3 As shown, the bridge housing further includes an arc structure 4 , and at least one of the first tip portion 20 and the second tip portion 30 is connected to the outer wall of the housing 1 through the arc structure 4 .

[0082] Exemplarily, any one or all of the first tip portion 20 and the second tip portion 30 are connected to the outer wall of the housing 1 through the arc structure 4. For example, the arc structure 4 includes a first arc structure and a second arc structure, the first tip portion 20 is connected to the outer wall of the housing 1 through the first arc structure, and the second tip portion 30 is connected to the outer wall of the housing 1 through the second arc structure.

[0083] For example, the stress concentration factor Kt of the first tip portion 20 and the second tip portion 30 is generally high. For example, the stress concentration factor Kt at the first tip portion 20 and the second tip portion 30 may be 3-5 or even higher.

[0084] For example, the arc structure 4 may specifically have a rounded corner structure. The rounded corners can disperse stress and avoid excessive stress concentration at sharp corners. The stress concentration coefficient Kt of the arc structure 4 is generally less than 2. It is understandable that as the radius of the arc structure 4 increases, the stress concentration coefficient will further decrease, but excessively large rounded corners may cause the structure size to increase. The radius size of the arc structure 4 can be determined and optimized based on the results of finite element analysis, taking lightweighting into consideration, and according to the actual load and overall structure size. Among them, under the action of fatigue load, fatigue cracks are prone to occur in stress concentration areas. The arc structure 4 adopts a rounded corner design, which can significantly reduce stress concentration, thereby extending the fatigue life of the structure and improving the overall strength of the structure.

[0085] In the bridge housing provided in this embodiment, the stress distribution of the first tip portion 20 and the second tip portion 30 is peak-shaped, resulting in relatively high local stress. The material's yield capacity is reduced due to stress concentration. At least one of the first tip portion 20 and the second tip portion 30 is connected to the outer wall of the housing 1 via an arc structure 4. By changing the geometric shape, the sharp-angle connection is converted to a rounded-angle connection, and the stress distribution of the arc structure 4 is smoother. The stress of the first tip portion 20 and the second tip portion 30 gradually transitions from the arc structure 4 to the outer wall of the housing 1, making the stress distribution more uniform, avoiding excessive local stress, and reducing the stress concentration factor. In addition, under the same load, the arc structure 4 has a stronger load-bearing capacity. The two tips are connected to the outer wall of the housing 1 via the arc structure 4, which can increase the effective load-bearing area of ​​the material, thereby improving the overall strength and toughness of the housing 1.

[0086] In one embodiment, Figure 4 As shown, the arc structure 4 includes an arc portion 41 and a filling portion 42 , wherein the arc portion 41 is arranged on the outer wall of the shell 1 ; wherein at least one of the first tip portion 20 and the second tip portion 30 is connected to the arc portion 41 through the filling portion 42 .

[0087] Exemplarily, the arc portion 41 is fixedly connected to the outer wall of the housing 1 , for example, the arc portion 41 is welded to the outer wall of the housing 1 , or the arc portion 41 and the housing 1 are an integrally formed structure.

[0088] Exemplarily, the arc portion 41 and the filling portion 42 are split structures. After the mounting bracket 2 is installed on the housing 1, the first tip portion 20 and the arc structure 4 correspond to and are spaced apart. The filling portion 42 is filled between the first tip portion 20 and the arc structure 4, so that the first tip portion 20 is connected to the arc structure 4 through the filling portion 42. For example, the first tip portion 20 is welded to the arc structure 4, and the filling portion 42 is the weld formed after welding. After the suspension cylinder seat 3 is installed on the housing 1, the second tip portion 30 and the arc structure 4 correspond to and are spaced apart. The filling portion 42 is filled between the second tip portion 30 and the arc structure 4, so that the second tip portion 30 is connected to the arc structure 4 through the filling portion 42. For example, the second tip portion 30 is welded to the arc structure 4, and the filling portion 42 is the weld formed after welding.

[0089] It is understandable that the filling portion 42 includes but is not limited to a weld, and may also be other strong adhesives for realizing the tip portion and the arc portion 41 , or may be other connecting parts with strong connection strength.

[0090] In one embodiment, Figure 4 As shown, the height of the arc portion 41 protruding from the outer wall of the shell 1 is equal to the height of the first tip portion 20 protruding from the outer wall of the shell 1; and / or, the height of the arc portion 41 protruding from the outer wall of the shell 1 is equal to the height of the second tip portion 30 protruding from the outer wall of the shell 1.

[0091] With this arrangement, the height of the two tip portions is substantially consistent with the overall height of the corresponding arc portion 41 . After the filling portion 42 is filled, the heights of the tip portion, the filling portion 42 and the arc portion 41 are approximately the same, achieving a uniform arc transition and avoiding stress concentration caused by bulges.

[0092] In one embodiment, Figure 2-Figure 4 As shown, along the axial direction of the housing 1 , the width of the arc portion 41 is greater than the width of the first tip portion 20 ; and / or, along the axial direction of the housing 1 , the width of the arc portion 41 is greater than the width of the second tip portion 30 .

[0093] In this way, the width of the arc portion 41 is greater than the width of the two tip portions. After the tip portion is connected to the arc portion 41, the connection area between the tip portion and the outer wall of the housing 1 is increased, reducing stress concentration.

[0094] like Figure 4-Figure 6 As shown, at least one of the first tip portion 20 and the second tip portion 30 is provided with a first inclined surface 201, and the arc portion 41 is provided with a second inclined surface 410 corresponding to the first inclined surface 201, and the inclination directions of the first inclined surface 201 and the second inclined surface 410 relative to the first direction are opposite; wherein, the filling portion 42 is provided between the first inclined surface 201 and the second inclined surface 410.

[0095] Specifically, the first bevel 201 is tilted relative to the first direction, resulting in a groove structure at its two tips. The second bevel 410 is tilted relative to the first direction, resulting in a groove structure at the arc portion 41. The first bevel 201 and the second bevel 410 are not parallel to each other. Instead, the first bevel 201 and the second bevel 410 are tilted toward opposite sides of the first direction, forming a V-shaped groove structure between the first bevel 201 and the second bevel 410, facilitating welding between the first bevel 201 and the second bevel 410.

[0096] In this way, the two inclined surfaces to be welded are inclined in opposite directions, which can ensure complete penetration of the weld root, improve the penetration of the weld root, avoid defects such as incomplete penetration and slag inclusion, and thus ensure the integrity and strength of the weld.

[0097] The angle between the first inclined surface 201 and the second inclined surface 410 is greater than or equal to 60°. For example, the angle can be 60°, 90°, or 120°.

[0098] This setting ensures that the angle range is not too narrow, ensuring that the weld root reaches full penetration and that the welding heat is more evenly distributed on both sides of the weld, reducing local overheating and stress concentration. It also reduces angular deformation caused by thermal expansion and contraction during welding. In addition, by setting the appropriate tilt angle, the amount of welding filler metal can be reduced while ensuring weld quality, thereby improving welding efficiency.

[0099] like Figure 5 As shown, the mounting frame 2 includes a cover plate 21, a vertical plate 25, a second mounting plate 33, a first mounting plate 23, a bearing seat 24, and two first side plates 22. The cover plate 21 and the vertical plate 25 are arranged along the second direction and are spaced apart in parallel. The cover plate 21 is connected to the outer wall of the housing 1. The two first side plates 22 are arranged along the axial direction of the housing 1 and are spaced apart in parallel. The first side plate 22 is connected to the outer wall of the housing 1. The second mounting plate 33 is located on the side of the first mounting plate 23 away from the housing 1. One side of the second mounting plate 33 is connected to the cover plate 21, the vertical plate 25, and the first side plate 22, respectively, and the other side is provided with a bearing seat 24.

[0100] Exemplarily, the first side plate 22 has a first arc groove, and the shell 1 is partially disposed in the first arc groove, so that the first side plate 22 and the outer wall of the shell 1 are adapted to each other.

[0101] For example, the outer shape of the cover plate 21 and the vertical plate 25 is similar to a trapezoidal structure. The vertical plate 25 may or may not be connected to the outer wall of the housing 1. The vertical plate 25 is located between the two first side plates 22 to improve the overall structural strength of the mounting frame 2. The cover plate 21, the vertical plate 25, and the two side plates form a tetrahedron structure. The tetrahedron structure has two openings at both ends along the first direction, one of which is arranged toward the housing 1. The second mounting plate 33 and the first mounting plate 23 block the other opening. The second mounting plate 33 and the first mounting plate 23 are used to mount the bearing seat 24, and the second mounting plate 33 and the first mounting plate 23 provide a mounting position for the bearing seat 24.

[0102] The first tip portion 20 is disposed on at least one side of the first side plate 22 along the second direction. The first tip portion 20 is disposed on one side of the first side plate 22 along the first direction and facing the housing 1 .

[0103] Specifically, the first side panel 22 may initially be a rectangular panel or a trapezoidal panel, and a first arc groove is provided on the side of the first side panel 22 facing the shell 1. The first arc groove does not pass through the two side edges of the first side panel 22 along the second direction, and there is a certain gap between the side wall of the first arc groove and the two side edges to form a first tip portion 20 on at least one side of the first side panel 22 along the second direction.

[0104] The first tip portion 20 is disposed on at least one side of the first side plate 22 along the second direction. The first tip portion 20 is disposed on one side of the first side plate 22 along the first direction and facing the housing 1 .

[0105] It can be understood that two first tip portions 20 are respectively provided on both sides of the first side plate 22 along the second direction, and the two first side plates 22 have four first tip portions 20, so the number of first arc structures is four, and the four first arc structures and the four first tip portions 20 are correspondingly arranged.

[0106] like Figure 7 As shown, a circular arc transition structure 210 is provided on the side of the cover plate 21 facing the housing 1 .

[0107] Before the cover plate 21 is improved, the cover plate 21 is similar to a trapezoidal plate structure. Specifically, the cover plate 21 has a first side 211, a second side 212 and two third sides 213. The first side 211 and the second side 212 are arranged in parallel and spaced apart. The length of the first side 211 is less than the length of the second side 212. The second side 212 is connected to the outer wall of the shell 1. The two third sides 213 are arranged between the first side 211 and the second side 212. The first side 211, the second side 212 and the two third sides 213 are connected end to end to form a trapezoidal structure.

[0108] At this point, the connection point between the first side 211 and the third side 213 is A. When the mounting frame 2 and the housing 1 are connected, stress concentrates at point A. To reduce stress concentration at point A, the length of the second side 212 is increased, extending point A to point B. A circular arc transition structure 210 is then provided on the side of the third side 213 facing the second side 212. This circular arc transition structure 210 is connected to the second side 212 via a connecting edge 214. This changes the original sharp corner A to a rounded corner CD, reducing stress concentration at point A and effectively reducing stress on the mounting frame 2. For example, the maximum stress of the mounting frame 2 is reduced from 770 MPa to 3700 MPa.

[0109] like Figure 8 As shown, the suspension cylinder base 3 includes two second side plates 31, two connecting plates 32, and a second mounting plate 33. The two second side plates 31 are distributed along the axial direction of the housing 1 and connected to the outer wall of the housing 1. The two connecting plates 32 are arranged along the first direction and are disposed between the two second side plates 31. At least one of the two connecting plates 32 is connected to the outer wall of the housing 1 via the second mounting plate 33.

[0110] Exemplarily, the second side plate 31 may be an arc plate, and a second arc groove is provided on the side of the second side plate 31 facing the shell 1. The shell 1 is at least partially provided in the second arc groove, so that the second side plate 31 and the outer wall of the shell 1 match.

[0111] Exemplarily, two connecting plates 32 are sandwiched between the two second side plates 31. The two connecting plates 32 can be referred to as an inner plate and an outer plate, respectively. The inner plate is disposed on the side of the second side plate 31 facing the housing 1, and the outer plate is disposed on the side of the second side plate 31 facing away from the housing 1. The two second side plates 31 and the two connecting plates 32 form a frame structure, wherein one connecting plate 32 is connected to the outer wall of the housing 1, for example, the inner plate is connected to the outer wall of the housing 1.

[0112] like Figure 8-Figure 9 As shown, a circular arc notch 311 is provided on at least one side of the second side plate 31 along the second direction.

[0113] Specifically, the second side plate 31 can initially be an arc-shaped plate. After the second side plate 31 is installed in the housing 1, stress on the second side plate 31 is concentrated near points E and F, which are sharp corners. A circular arc notch 311 is provided in the second side plate 31, for example, using an arc segment EGF with a radius of approximately 200 mm, to disperse the stress at point E. When the second side plate 31 is subjected to pressure or tension in the second direction, the arc segment EGF has a greater bearing capacity than the straight line EF, thereby reducing stress on the cylinder mount 3. For example, the maximum stress on the cylinder mount 3 is reduced from 1620 MPa to 482 MPa.

[0114] Among them, such as Figure 9-10As shown, after the arc notch 311 is provided on one side of the second side plate 31 along the second direction, the second tip portion 30 is formed on one side of the second side plate 31 along the first direction and toward the outer wall of the housing 1 .

[0115] Specifically, the arc notch 311 does not penetrate the two side edges of the second side plate 31 along the first direction, and there is a certain distance between the side wall of the arc notch 311 and the two side edges to form a second tip portion 30 on at least one side of the second side plate 31 along the first direction.

[0116] It is understandable that compared to a straight structure, the arc-shaped notch 311 has a more uniform stress distribution and can effectively reduce the stress concentration factor. For example, under tension, the stress concentration factor of the arc transition is 20% higher than the optimal curve, which can better disperse stress. In addition, compared to a straight contact structure, the arc-shaped structure can significantly reduce the peak stress at the edge of the contact area, thereby improving the fatigue resistance of the structure. However, if the second tip 30 generated by the arc notch 311 is directly connected to the outer wall of the shell 1, stress concentration will occur. Therefore, the second tip 30 is connected to the outer wall of the shell 1 through the arc structure 4 to solve the problem of stress concentration.

[0117] like Figure 11-12 As shown, the arc structure 4 includes a first arc structure, and the first tip portion 20 is connected to the outer wall of the housing 1 through the first arc structure. Specifically, the arc portion 41 of the first arc structure includes an arc body 411 and a transition portion 412. The arc body 411 is provided on the outer wall of the housing 1. The transition portion 412 is provided on the side of the arc body 411 facing the first tip portion 20.

[0118] For example, the arc body 411 may have a truncated cone or a conical cone structure, and the cross-section of the arc body 411 may be circular or waist-shaped. The transition portion 412 may have a rectangular parallelepiped structure with a second inclined surface 410. The height of the arc body 411 and the transition portion 412 may both be 12 mm. The arc body 411 and the transition portion 412 are connected by a fillet with a radius of 10 mm to reduce stress at the connection point.

[0119] For example, the arc body 411 and transition portion 412 can be separate structures, connected by welding or bolts. Alternatively, the arc body 411 and transition portion 412 can be integrally formed, reducing the number of parts to be assembled and lowering production costs. The combined length of the arc body 411 and transition portion 412 is approximately 60 mm.

[0120] Exemplarily, the second inclined surface 410 is disposed on a side of the transition portion 412 facing the first tip portion 20 , and the inclination angle of the second inclined surface 410 is approximately 40°. The first tip portion 20 is connected to the arc body 411 through the filling portion 42 .

[0121] Since a smaller-sized arc body 411 is difficult to process, the size of the arc body 411 is usually larger. However, if the width of the first tip portion 20 is relatively small, the size difference between the first tip portion 20 and the arc body 411 is relatively large, which is not conducive to the transition connection between the first tip portion 20 and the arc body 411.

[0122] To this end, along the axial direction of the housing 1, the width of the transition portion 412 is smaller than the width of the arc body 411. For example, the width of the transition portion 412 is about 12 mm.

[0123] In this configuration, the size of the transition portion 412 is between the first tip portion 20 and the arc body 411, that is, the sizes of the first tip portion 20, the transition portion 412 and the arc body 411 gradually increase. When the first tip portion 20 is connected to the arc body 411 through the transition portion 412, a uniform and smooth transition connection is achieved, avoiding stress concentration when the first tip portion 20 and the arc body 411 are connected.

[0124] like Figure 13-14 As shown, the arc structure 4 also includes a second arc structure, through which the second tip portion 30 is connected to the outer wall of the housing 1. The arc portion 41 of the second arc structure can initially be a truncated cone structure. For example, the diameter of the arc portion 41 is greater than 40 mm, and the height of the arc portion 41 is approximately 20 mm. A second inclined surface 410 is provided on the side of the arc portion 41 facing the second tip portion 30, and the inclination angle of the second inclined surface 410 is approximately 40°.

[0125] In one embodiment, Figure 1-Figure 2 As shown, the axle housing includes a reinforcement structure 5, which is arranged on the inner wall of the housing 1. The reinforcement structure 5 can increase the bending, torsion and shear resistance of the housing 1.

[0126] Specifically, the reinforcement structure 5 includes a plurality of reinforcement groups 52. The housing 1 is provided with a through hole 10. The plurality of reinforcement groups 52 are located on both sides of the through hole 10 along the axial direction of the housing 1. For example, the reinforcement groups 52 may be reinforcement ribs, reinforcement protrusions, etc.

[0127] Because through-hole 10 is a weak point in housing 1, adding reinforcement groups 52 on both sides of the weak point improves the structural deformation resistance of housing 1 and reduces deflection and deformation under load. At the same time, reinforcement groups 52 effectively disperse stress, preventing structural failure caused by excessive local stress.

[0128] Specifically, the reinforcement group 52 includes a plurality of annular reinforcing ribs 521, which are arranged along the circumference of the shell 1 to increase the structural strength of the shell 1 in the circumferential direction. The plurality of annular reinforcing ribs 521 are distributed along the axial direction of the shell 1. For example, along the axial direction of the shell 1, the spacing between two adjacent annular reinforcing ribs 521 is the same, thereby improving the uniformity of the distribution of the annular reinforcing ribs 521.

[0129] The reinforcement structure 5 further includes at least one first reinforcement rib 51 . The first reinforcement rib 51 extends along the axial direction of the housing 1 and is arranged between adjacent reinforcement groups 52 .

[0130] The first reinforcing rib 51 is relatively long and can be referred to as a long transverse reinforcing rib. It is positioned near the weak points of the through-hole 10 to increase structural strength in these areas. Furthermore, stress concentration is prone to occur at the joints between the mounting bracket 2 and the housing 1, and between the suspension cylinder base 3 and the housing 1, leading to localized excessive stress and becoming structural weaknesses. Providing the first reinforcing rib 51 in these stress-concentrated areas disperses the stress over a wider area, reducing localized stress levels.

[0131] Exemplarily, when there are multiple first reinforcing ribs 51 , the multiple first reinforcing ribs 51 are symmetrically arranged on both sides of the central axis of the shell 1 , wherein the central axis of the shell 1 and the axial direction of the shell 1 are arranged in parallel.

[0132] The reinforcement structure 5 further includes a plurality of second reinforcement ribs 53 . The second reinforcement ribs 53 are arranged along the axial direction of the shell 1 and between two adjacent annular reinforcement ribs 521 .

[0133] Among them, the length of the second reinforcement rib 53 is relatively short, and the second reinforcement rib 53 can be called a short transverse reinforcement rib. The second reinforcement rib 53 can strengthen the structural strength of the area between two adjacent annular reinforcement ribs 521. At the same time, by utilizing the strength and rigidity of the second reinforcement rib 53 itself, it can bear part of the load, thereby reducing the structural burden of the shell 1.

[0134] By cooperating with each other, the first reinforcing rib 51 , the second reinforcing rib 53 and the annular reinforcing rib 521 , a reinforcing rib combination method is adopted, which is applicable to complex load conditions and can evenly disperse stress, thereby improving the overall rigidity of the shell 1 .

[0135] In one embodiment, along the axial direction of the housing 1 , the sum of the length of the at least one first reinforcing rib 51 and the lengths of the plurality of second reinforcing ribs 53 is equal to the length of the housing 1 .

[0136] Because the shell 1 is a slender, thin-walled structure, the first and second reinforcing ribs 51, 53 are not only positioned at stress concentration points within the shell 1, but also extend through the shell 1, preventing buckling and improving structural stability. Without compromising the structural performance of the shell 1, the rational placement and dimensions of the first and second reinforcing ribs 51, 53 can reduce material usage, thus meeting the need for lightweighting the shell 1.

[0137] like Figure 15 As shown, this embodiment also provides a bridge housing stress control method, which includes the following steps:

[0138] S1. Obtain a three-dimensional model of the axle housing and apply a load to obtain a first actual stress of the axle housing;

[0139] For example, a three-dimensional model of the axle housing of a mining dump truck was created using computer modeling software, and then simulated using finite element analysis software. During the analysis, appropriate loads and constraints were applied based on the actual operating conditions of the mining dump truck to simulate the stress distribution of the axle housing under different operating conditions.

[0140] S2, determine whether the first actual stress is less than or equal to the preset stress, if not, execute S3; if so, execute S5;

[0141] S3. Optimize the structure of the bridge housing respectively;

[0142] Based on the simulation results, the bridge housing structure is optimized. Specifically, local structural optimization designs are performed on parts such as the mounting frame 2, the cylinder suspension seat 3 and the reinforcement structure 5 to improve the strength and stiffness of these positions and reduce the stress value in the stress concentration area.

[0143] S4. Determine whether the second actual stress of the axle housing after structural optimization is less than or equal to the preset stress. If so, execute S5; if not, return to S1;

[0144] S5. Determine the structure of the bridge housing.

[0145] To address the significant stress concentration and fatigue cracking issues experienced by existing mining dump truck axle housings under heavy loads, finite element analysis was used to identify these stress concentration points. The structural design of the corresponding areas was modified, and matching arc structures 4 were added at these stress concentration points. Furthermore, reinforcement structures 5 were added to the inner wall of the housing 1. By optimizing the axle housing layout and localized reinforcement design, peak stresses in key areas were significantly reduced, resulting in a more uniform stress distribution across the axle housing. This is expected to reduce the maximum stress in the axle housing by over 40%. For example, the maximum stress in a localized area of ​​the axle housing can be reduced by at least 43%, and the overall maximum stress in the axle housing can be reduced by up to 70%. This effectively reduces stress in the axle housing and improves its fatigue resistance.

[0146] This embodiment also provides a dump truck, which can be a mining dump truck. The dump truck includes the above-mentioned bridge housing.

[0147] The dump truck provided in this embodiment improves and optimizes the local structure of the bridge shell according to the stress distribution of the bridge shell, and can meet the lightweight requirements without reducing the strength and rigidity of the bridge shell, thereby improving the economy and reliability of the mining dump truck.

[0148] It should be noted that the embodiments of the present invention shown in the drawings and described in this specification are merely examples of the principles of the present invention. It should be clearly understood by those skilled in the art that the principles of the present invention are not limited to any details or any components of the devices shown in the drawings or described in the specification.

[0149] It will be understood that the present invention is not limited in its application to the detailed construction and arrangement of components set forth in this specification. The present invention is capable of other embodiments and can be implemented and carried out in a variety of ways. The aforementioned variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All of these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the invention and will enable those skilled in the art to utilize the invention.

[0150] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and illustrative embodiments are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the appended claims.

[0151] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A bridge housing, characterized in that: include: case; a mounting bracket, disposed on an outer wall of the housing and located on one side of the housing along a first direction, wherein at least one side of the mounting bracket along a second direction is provided with a first tip portion; a suspension cylinder seat, disposed on the outer wall of the housing and located on the other side of the housing along the first direction, wherein at least one side of the suspension cylinder seat along the second direction is provided with a second tip portion; an arc structure, wherein at least one of the first tip portion and the second tip portion is connected to the outer wall of the housing through the arc structure; The first direction, the second direction and the axial direction of the housing are perpendicular to each other.

2. The axle housing according to claim 1, characterized in that: The arc structure includes an arc portion and a filling portion, and the arc portion is provided on the outer wall of the shell; Wherein, at least one of the first tip portion and the second tip portion is connected to the arc portion through the filling portion.

3. The axle housing according to claim 2, characterized in that: Along the axial direction of the housing, the width of the arc portion is greater than the width of the first tip portion; And / or, along the axial direction of the housing, the width of the arc portion is greater than the width of the second tip portion.

4. The axle housing according to claim 2, characterized in that: The height of the arc portion protruding from the outer wall of the shell is equal to the height of the first tip portion protruding from the outer wall of the shell; And / or, the height of the arc portion protruding from the outer wall of the shell is equal to the height of the second tip portion protruding from the outer wall of the shell.

5. The axle housing according to claim 2, characterized in that: At least one of the first tip portion and the second tip portion is provided with a first inclined surface, and the arc portion is provided with a second inclined surface corresponding to the first inclined surface, and the first inclined surface and the second inclined surface are inclined in opposite directions relative to the first direction; Wherein, the filling portion is arranged between the first inclined surface and the second inclined surface.

6. The axle housing according to claim 5, characterized in that: An included angle between the first inclined surface and the second inclined surface is greater than or equal to 60°.

7. The axle housing according to claim 5, characterized in that: The arc portion includes: An arc body is provided on the outer wall of the shell; a transition portion, disposed on a side of the arc body facing the first tip portion, the second inclined surface disposed on a side of the transition portion facing the first tip portion, and the first tip portion connected to the arc body through the filling portion; Wherein, along the axial direction of the shell, the width of the transition portion is smaller than the width of the arc body.

8. The axle housing according to any one of claims 1 to 6, characterized in that: The mounting frame comprises: The cover plate and the vertical plate are arranged along the second direction and are parallel and spaced apart, and the cover plate is connected to the outer wall of the shell; Two first side plates are arranged in parallel and spaced apart along the axial direction of the shell, and the first side plates are connected to the outer wall of the shell; a first mounting plate and a bearing seat, wherein the first mounting plate is located on a side of the first side plate away from the housing, one side of the first mounting plate is respectively connected to the cover plate, the vertical plate and the first side plate, and the other side is provided with the bearing seat; The first tip portion is provided on at least one side of the first side plate along the second direction, and the first tip portion is provided on one side of the first side plate along the first direction and facing the housing.

9. The axle housing according to claim 8, characterized in that: A circular arc transition structure is provided on a side of the cover plate facing the housing.

10. The axle housing according to any one of claims 1 to 6, characterized in that: The suspension cylinder seat comprises: two second side plates, distributed along the axial direction of the shell and connected to the outer wall of the shell; Two connecting plates, arranged along the first direction and disposed between the two second side plates, one of the two connecting plates being connected to the outer wall of the housing via a second mounting plate; The second side plate is provided with an arc notch on at least one side along the second direction, so that the second side plate forms the second tip portion along the first direction and on one side facing the outer wall of the shell.

11. The axle housing according to any one of claims 1 to 6, characterized in that: Also included is a reinforcement structure, wherein the reinforcement structure is provided on the inner wall of the shell; The reinforcement structure includes at least one first reinforcement rib, multiple reinforcement groups and multiple second reinforcement ribs. The shell is provided with a through hole, and the multiple reinforcement groups are located on both sides of the through hole along the axial direction of the shell. The first reinforcement rib extends along the axial direction of the shell and is arranged between adjacent reinforcement groups; the reinforcement group includes multiple annular reinforcement ribs, and the multiple annular reinforcement ribs are distributed along the axial direction of the shell and arranged along the circumference of the shell. The second reinforcement rib is arranged along the axial direction of the shell and between two adjacent annular reinforcement ribs.

12. The axle housing according to claim 11, characterized in that: Along the axial direction of the shell, the sum of the length of at least one first reinforcing rib and the lengths of a plurality of second reinforcing ribs is equal to the length of the shell.

13. A dump truck, characterized in that: Comprising the axle housing according to any one of claims 1 to 12.

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