Rear axle housing of mining dump truck with electric wheels and mining dump truck with electric wheels

Abstract

The utility model provides an electric wheel mining dump truck rear axle housing and an electric wheel mining dump truck, and relates to the technical field of electric wheel mining dump trucks, the electric wheel mining dump truck rear axle housing comprises a trailing arm support, a front trailing arm and a rear axle housing body, the trailing arm support, the front trailing arm and the rear axle housing body are connected in sequence, the trailing arm support is a casting part, the front trailing arm comprises a box type trailing arm structure, the rear axle housing body is of a cylindrical structure, and a first reinforcing structure is arranged in the rear axle housing body. The rear axle housing of the mining dump truck with the electric wheels has higher structural strength, stability and anti-fatigue performance, and is light in weight.

Description

Technical Field

[0001] This utility model relates to the technical field of electric wheel mining dump trucks, specifically to a rear axle housing for an electric wheel mining dump truck and an electric wheel mining dump truck. Background Technology

[0002] Electric wheel mining dump trucks are commonly used to transport sand, gravel, and coal in large open-pit mines, especially in mines with an annual output exceeding 10 million tons, where they occupy a significant market share. Due to their simple and reliable structure, high load-bearing capacity, good maneuverability, and low fuel consumption, market demand is increasing daily, directly driving the development of electric wheel mining dump trucks.

[0003] During the operation of electric wheel mining dump trucks, the rear drive axle is the most important force transmission and load-bearing structure, mainly composed of the rear axle housing, electric wheels, and suspension system. Among these, the rear axle housing is the most important connecting component. The suspension system, electric wheels, and other components all need to be installed on the rear axle housing. The sprung load is mainly borne by the rear axle housing, and the various excitations transmitted from the ground to the chassis are also borne by the rear axle housing. Currently, most rear axle housings of electric wheel mining dump trucks on the market use heavy metal materials to improve load-bearing capacity, which has defects in terms of fatigue resistance, wear resistance, and ease of maintenance. Moreover, it also results in a large weight for the rear axle housing of the electric wheel mining dump truck. Utility Model Content

[0004] This utility model aims at at least one of the above-mentioned technical problems.

[0005] To address the aforementioned problems, this utility model provides a rear axle housing for an electric wheel mining dump truck, comprising a longitudinal arm support, a front longitudinal arm, and a rear axle housing body. The longitudinal arm support, the front longitudinal arm, and the rear axle housing body are connected sequentially. The longitudinal arm support is a casting, the front longitudinal arm includes a box-type longitudinal arm structure, and the rear axle housing body is a cylindrical structure. Furthermore, a first reinforcing structure is provided within the rear axle housing body.

[0006] This utility model provides a rear axle housing for an electric wheel mining dump truck. It is not a single, heavy metal structure, but rather a modular assembly. Specifically, the rear axle housing is composed of three parts connected sequentially from front to back: a trailing arm support, a front trailing arm, and the rear axle housing body. In this modular structure, the foremost trailing arm support is a casting. This casting allows for an integrated design, meeting the requirements of special structures. Compared to welded components, the cast trailing arm support offers superior integrity, higher structural strength, stability, and fatigue resistance; it is also lighter, thus reducing the overall weight of the rear axle housing. Secondly, the front trailing arm is not a solid structure, but a box-type trailing arm structure with a hollow interior. This further reduces the weight of the rear axle housing of the electric wheel mining dump truck. Moreover, even though the box-type trailing arm structure is hollow, it still possesses a certain structural strength. In addition, the rear axle housing body, like the traditional rear axle housing body, is also a cylindrical structure to accommodate the electric wheel and brake components. Furthermore, the cylindrical rear axle housing body has a first reinforcing structure inside, such as reinforcing ribs on the inner wall of the rear axle housing body, which improves the structural strength of the rear axle housing body and even the rear axle housing of the electric wheel mining dump truck.

[0007] Furthermore, the first reinforcing structure includes axial stiffeners and circumferential stiffeners. The axial stiffeners extend axially along the rear axle housing body, and the circumferential stiffeners extend circumferentially along the rear axle housing body. A plurality of axial stiffeners are sequentially distributed circumferentially along the rear axle housing body, and a plurality of circumferential stiffeners are sequentially distributed axially along the rear axle housing body.

[0008] Furthermore, along the circumferential direction of the rear axle housing body, at least some of the axial stiffeners are arranged at non-equidistant intervals; or / and, along the axial direction of the rear axle housing body, at least some of the circumferential stiffeners are arranged at non-equidistant intervals.

[0009] Furthermore, the box-type trailing arm structure includes a front side plate, a left side plate, a right side plate, an upper side plate, and a lower side plate. The front ends of the left side plate, the right side plate, the upper side plate, and the lower side plate are respectively connected to the front side plate, and the rear ends of the left side plate, the right side plate, the upper side plate, and the lower side plate are respectively connected to the rear axle housing body. In the direction from the front side plate to the rear axle housing body, the interval between the left side plate and the right side plate gradually increases, and the interval between the upper side plate and the lower side plate gradually increases.

[0010] Furthermore, the front side plate is provided with a weight reduction hole, and the trailing arm support includes a support plate and a support frame connected together. The support frame is used to connect with the vehicle body, and the support plate is connected to the front side plate and covers the weight reduction hole; and / or, the front ends of the left side plate, the right side plate, the upper side plate, and the lower side plate are all located within the edge of the front side plate; and / or, the upper ends of the left side plate and the right side plate are all located within the edge of the upper side plate, and the lower ends of the left side plate and the right side plate are all located within the edge of the lower side plate.

[0011] Furthermore, the front longitudinal arm also includes a duct and a split air box. The rear axle housing body has air inlets at both ends in its axial direction, and the left side plate and the right side plate are respectively provided with split air inlets. One end of the duct is connected to the upper side plate and communicates with the internal space of the box-type longitudinal arm structure. The two split air boxes are respectively arranged on both sides of the box-type longitudinal arm structure, and each split air box is connected to the corresponding split air inlet and air inlet.

[0012] Furthermore, the diversion box has a first opening on the side facing the diversion air outlet, and the diversion box has a second opening on the side facing the air inlet.

[0013] Furthermore, the rear axle housing of the electric wheel mining dump truck also includes a support structure disposed on the rear axle housing body. The support structure includes two spaced-apart support plates. Each support plate includes a support bottom edge connected to the rear axle housing body. The two ends of the support bottom edge extending in the direction of extension are welded to the rear axle housing body to form a dovetail weld.

[0014] Furthermore, the support structure also includes a second reinforcing structure disposed between the two axle plates. The second reinforcing structure includes a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib. The first reinforcing rib and the second reinforcing rib are disposed at intervals between the two axle plates. The third reinforcing rib is connected between the ends of the first reinforcing rib and the second reinforcing rib that are away from the rear axle housing body.

[0015] This utility model also provides an electric wheel mining dump truck, including the rear axle housing of the electric wheel mining dump truck as described above.

[0016] Since the technological improvements and beneficial effects of the electric wheel mining dump truck are at least the same as those of the rear axle housing of the electric wheel mining dump truck, the electric wheel mining dump truck will not be described in detail here. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the rear axle housing of the electric wheel mining dump truck according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the rear axle housing body according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the front longitudinal arm in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the longitudinal arm support according to an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Longitudinal arm support; 11. Support plate; 12. Support frame; 2. Front longitudinal arm; 21. Front side plate; 211. Weight reduction hole; 212. Lifting support; 22. Left side plate; 23. Right side plate; 24. Upper side plate; 25. Lower side plate; 26. Cap brim; 27. Diverter air outlet; 28. Air duct; 29. ​​Diverter air box; 3. Rear axle housing body; 31. Axial stiffener; 32. Circumferential stiffener; 33. Air inlet; 34. Inspection port support ring; 35. End frame; 4. Support structure; 41. Support ear plate; 411. Bottom edge of support ear; 412. Dovetail weld; 42. First reinforcing stiffener plate; 43. Third reinforcing stiffener plate; 5. Side plate. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing up and the negative direction representing down. The Y-axis represents the left and right direction, with the positive direction of the Y-axis representing the left and the negative direction representing the right. The X-axis represents the longitudinal direction, i.e., forward and backward, with the positive direction of the X-axis representing forward and the negative direction representing backward. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for ease of description and simplification of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0026] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0027] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0028] See Figure 1 An embodiment of the present invention provides a rear axle housing for an electric wheel mining dump truck, comprising a longitudinal arm support 1, a front longitudinal arm 2, and a rear axle housing body 3. The longitudinal arm support 1, the front longitudinal arm 2, and the rear axle housing body 3 are connected in sequence. The longitudinal arm support 1 is a casting, the front longitudinal arm 2 includes a box-type longitudinal arm structure, and the rear axle housing body 3 is a cylindrical structure. A first reinforcing structure is provided inside the rear axle housing body 3.

[0029] The rear axle housing of the electric wheel mining dump truck in this embodiment is not a one-piece, heavy metal structure, but is assembled from a split structure. That is, the rear axle housing of the electric wheel mining dump truck is mainly composed of three parts connected in sequence, specifically the longitudinal arm support 1, the front longitudinal arm 2, and the rear axle housing body 3 connected in sequence from front to back.

[0030] In the case of a split structure for the rear axle housing of an electric wheel mining dump truck, the foremost longitudinal arm support 1 is made of casting. The longitudinal arm support 1 is integrated through casting, which can meet the design requirements of special structures. Compared with welded parts, the cast longitudinal arm support 1 has good integrity, higher structural strength, stability and fatigue resistance; and it is also lighter in weight, which can reduce the weight of the rear axle housing of the electric wheel mining dump truck.

[0031] Secondly, the front trailing arm 2 is not a solid structure, but a box-type trailing arm structure with a hollow interior, which can further reduce the weight of the rear axle housing of the electric wheel mining dump truck. Furthermore, even though the box-type trailing arm structure is hollow inside, it still has a certain structural strength.

[0032] In addition, the rear axle housing body 3 is also a cylindrical structure, just like the traditional rear axle housing body 3, so that the electric wheel and brake and other structures can be arranged inside. On this basis, the interior of the cylindrical rear axle housing body 3 is equipped with a first reinforcing structure, such as a reinforcing rib structure on the inner wall of the rear axle housing body 3, which can improve the structural strength of the rear axle housing body 3 and even the rear axle housing of the electric wheel mining dump truck.

[0033] See Figure 1-2 Optionally, the first reinforcing structure includes an axial stiffener 31 and a circumferential stiffener 32. The axial stiffener 31 extends along the axial direction of the rear axle housing body 3, and the circumferential stiffener 32 extends along the circumferential direction of the rear axle housing body 3. A plurality of axial stiffeners 31 are distributed sequentially along the circumferential direction of the rear axle housing body 3, and a plurality of circumferential stiffeners 32 are distributed sequentially along the axial direction of the rear axle housing body 3.

[0034] In this embodiment, the first reinforcing structure for strengthening the rear axle housing body 3 is composed of axial stiffeners 31 and circumferential stiffeners 32 disposed on the inner wall of the rear axle housing body 3. As the name suggests, the axial stiffeners 31 extend along the axial direction of the rear axle housing body 3, and the circumferential stiffeners 32 extend along the circumferential direction of the rear axle housing body 3. The multiple axial stiffeners 31 and the multiple circumferential stiffeners 32 form a grid-like stiffener structure, which has a better reinforcing effect on the rear axle housing body 3.

[0035] The cylindrical rear axle housing body 3 is made of high-strength material through rolling and welding, and can undergo back cleaning and internal flaw detection to ensure the strength and stability of the rear axle housing body 3. A dedicated drainage hole (not shown in the figure) is provided at the bottom of the rear axle housing body 3. The design position and number of axial stiffeners 31 and circumferential stiffeners 32 can be arranged according to the stress distribution of the rear axle housing body 3, effectively reducing the number of stiffeners while ensuring strength, thus achieving a lightweight effect.

[0036] In this design, a maintenance access port is located at the rear of the rear axle housing 3, away from the front trailing arm 2. This access port can be designed to be relatively large to facilitate maintenance of the internal structure. Furthermore, a maintenance access port support ring 34 can be provided at the edge of the access port to increase the structural strength of the rear axle housing 3 at the access port location.

[0037] See Figure 1-2 Optionally, at least a portion of the axial stiffeners 31 are provided at non-equidistant intervals along the circumferential direction of the rear axle housing body 3; or / and, at least a portion of the circumferential stiffeners 32 are provided at non-equidistant intervals along the axial direction of the rear axle housing body 3.

[0038] In this embodiment, at least some of the axial stiffeners 31 are not equally spaced in the circumferential direction of the rear axle housing body 3, that is, not all of the axial stiffeners 31 are equally spaced; correspondingly, not all of the circumferential stiffeners 32 are equally spaced either; thus, the number of stiffeners can be effectively reduced while ensuring the strength of the rear axle housing body 3, achieving the effect of lightweighting.

[0039] See Figure 3 Optionally, the box-type longitudinal arm structure includes a front side plate 21, a left side plate 22, a right side plate 23, an upper side plate 24, and a lower side plate 25. The front ends of the left side plate 22, the right side plate 23, the upper side plate 24, and the lower side plate 25 are respectively connected to the front side plate 21, and the rear ends of the left side plate 22, the right side plate 23, the upper side plate 24, and the lower side plate 25 are respectively connected to the rear axle housing body 3. In the direction from the front side plate 21 to the rear axle housing body 3, the interval between the left side plate 22 and the right side plate 23 gradually increases, and the interval between the upper side plate 24 and the lower side plate 25 gradually increases.

[0040] In this embodiment, the front side plate 21, the left side plate 22, the right side plate 23, the upper side plate 24, and the lower side plate 25 together form a box-type longitudinal arm structure. The rear side of the box-type longitudinal arm structure is an opening. After the rear end of the box-type longitudinal arm structure (including the rear end of the upper side plate 24, the rear end of the lower side plate 25, the rear end of the left side plate 22, and the rear end of the right side plate 23) is connected to the rear axle housing body 3, the opening on the rear side of the box-type longitudinal arm structure is closed by the rear axle housing body 3.

[0041] In this embodiment, from front to back, the distance between the left side plate 22 and the right side plate 23 increases, and the distance between the upper side plate 24 and the lower side plate 25 increases. In other words, the cross-sectional shape of the box-type longitudinal arm structure in the XY plane and the cross-sectional shape in the XZ plane are both trapezoidal, which makes the rear opening of the box-type longitudinal arm structure larger, which in turn increases the connection area with the rear axle housing body 3. After welding, the stability of the connection between the box-type longitudinal arm structure and the rear axle housing body 3 is higher, and the overall load-bearing capacity is also higher.

[0042] Among them, such as Figure 3 As shown, the front longitudinal boom 2 may also include a lifting support 212, which can be set at the top of the front end of the box-type longitudinal boom structure to facilitate the lifting of the box-type longitudinal boom structure and even the entire front longitudinal boom 2.

[0043] See Figure 3-4Optionally, the front side plate 21 is provided with a weight reduction hole 211, the trailing arm support 1 includes a support plate 11 and a support frame 12 connected together, the support frame 12 is used to connect with the vehicle body, the support plate 11 is connected to the front side plate 21 and covers the weight reduction hole 211; and / or, the front ends of the left side plate 22, the right side plate 23, the upper side plate 24 and the lower side plate 25 are all located within the edge of the front side plate 21; and / or, the upper ends of the left side plate 22 and the right side plate 23 are all located within the edge of the upper side plate 24, and the lower ends of the left side plate 22 and the right side plate 23 are all located within the edge of the lower side plate 25.

[0044] In this embodiment, the front side plate 21 is provided with a weight reduction hole 211 to achieve a weight reduction design. On this basis, the support plate 11 of the trailing arm support 1 is attached to and fixed to the front side plate 21. At the same time, the support plate 11 closes the weight reduction hole 211 to prevent external impurities from entering the box-type trailing arm structure through the weight reduction hole 211. The support frame 12 is used to connect with the vehicle frame.

[0045] In this embodiment, as Figure 3 As shown, the front ends of the left side plate 22, right side plate 23, upper side plate 24, and lower side plate 25 are all located within the edge of the front side plate 21, meaning the edge of the front side plate 21 extends outward to form a brim 26. Similarly, the upper ends of the left side plate 22 and right side plate 23 are all located within the edge of the upper side plate 24, meaning the left and right edges of the upper side plate 24 extend outward to form a brim 26. Likewise, the lower ends of the left side plate 22 and right side plate 23 are all located within the edge of the lower side plate 25, meaning the left and right edges of the lower side plate 25 extend outward to form a brim 26. This arrangement of the brims 26 facilitates welding and fixing between adjacent side plates, increasing the welding area and stability.

[0046] See Figure 1 and Figure 3 Optionally, the front longitudinal arm 2 further includes a duct 28 and a split air box 29. The rear axle housing body 3 is provided with air inlets 33 at both ends in its axial direction. The left side plate 22 and the right side plate 23 are respectively provided with split air inlets 27. One end of the duct 28 is connected to the upper side plate 24 and communicates with the internal space of the box-type longitudinal arm structure. The two split air boxes 29 are respectively provided on both sides of the box-type longitudinal arm structure. Each split air box 29 is connected to the corresponding split air inlet 27 and air inlet 33.

[0047] In the prior art, since at least a portion of the rear axle housing 3 is used to accommodate the electric wheel (not shown in the figure), and the drive motor of the electric wheel is located inside the rear axle housing 3, the electric wheel generates high temperatures when operating at high speeds. If it remains in a high-temperature state for a long time, the electric wheel is prone to failure. Based on this, in this embodiment, the front trailing arm 2 includes not only the aforementioned box-type trailing arm structure, but also a duct 28 and a split air box welded to the box-type trailing arm structure; furthermore, air inlets 33 are provided at both axial ends of the rear axle housing 3 at positions corresponding to the drive motors of the electric wheels, and the left side plate 22 and the right side plate 23 are respectively provided with split air inlets 27 corresponding to the corresponding split air boxes 29; thus, when cold air is introduced into the box-type trailing arm structure through the duct 28, the cold air will be split into two airflows, which will pass through the two split air inlets 27 and the two split air boxes 29 respectively, and then blow onto the drive motor of the electric wheel through the corresponding air inlets 33, thereby achieving cooling and heat dissipation of the electric wheel and preventing the electric wheel from overheating.

[0048] See Figure 3 Optionally, the diversion box 29 has a first opening on the side facing the diversion air outlet 27, and the diversion box 29 has a second opening on the side facing the air inlet 33.

[0049] In this embodiment, the diversion air box 29 is a box structure with openings on both adjacent sides. The first opening corresponds to the diversion air inlet 27 of the box-type longitudinal arm structure, and the second opening corresponds to the air inlet 33 of the rear axle housing body 3. The diversion air box 29 can be constructed using only four plates, which can further reduce the weight of the rear axle housing of the electric wheel mining dump truck.

[0050] See Figure 1 Optionally, the rear axle housing of the electric wheel mining dump truck further includes a support structure 4 disposed on the rear axle housing body 3. The support structure 4 includes two spaced-apart lug plates 41. Each lug plate 41 includes a lug bottom edge 411 connected to the rear axle housing body 3. The two ends of the lug bottom edge 411 extending in the direction of extension are welded to the rear axle housing body 3 to form a dovetail weld 412.

[0051] In this embodiment, similar to the prior art, three support structures 4 can be provided. One support structure 4 is used to install the tie rod (not shown in the figure), which can also be called the tie rod support. This support structure 4 is connected to the frame through the tie rod. The other two support structures 4 are distributed sequentially along the axial direction of the rear axle housing body 3 and are located on both sides of the inspection port. These two supports are used to install the suspension structure, which can also be called the suspension supports. These two support structures 4 are connected to the frame through suspension cylinders. Among them, the support frame 12 of the trailing arm support 1 has bearing holes, which are connected to the frame through bearings. When the suspension cylinder extends or retracts, the entire rear axle housing of the electric wheel mining dump truck can swing up and down around the foremost bearing hole to achieve shock absorption.

[0052] Unlike existing technologies, the support structure 4 includes two spaced-apart lug plates 41, and the ends of the lug bottom edges 411 of both lug plates 41 are dovetail welded. That is, each lug plate 41 has a dovetail weld 412 at the end of its lug bottom edge 411. By using double dovetail welds 412, the support structure 4 has higher strength and better fatigue resistance, which can effectively resist external forces, ensure the stability and safety of the structure, and extend the service life of the structure.

[0053] Optionally, in addition to the support structure 4, axial stiffener 31 and circumferential stiffener 32 welded to the rear axle housing body 3, an end frame 35 is also welded to the rear axle housing body 3. The end frame 35 is located between the two axial ends of the rear axle housing body 3. The end frame 35 is used to install the electric wheel. The end frame 35 is forged and has excellent mechanical properties, high dimensional accuracy, and high reliability and stability.

[0054] See Figure 1 Optionally, the support structure 4 further includes a second reinforcing structure disposed between the two axle plates 41. The second reinforcing structure includes a first reinforcing rib plate 42, a second reinforcing rib plate and a third reinforcing rib plate 43. The first reinforcing rib plate 42 and the second reinforcing rib plate are disposed at intervals between the two axle plates 41. The third reinforcing rib plate 43 is connected between the ends of the first reinforcing rib plate 42 and the second reinforcing rib plate away from the rear axle housing body 3.

[0055] In this embodiment, in order to further enhance the strength of the support structure 4, a second reinforcing structure is provided between the two ear plates 41. The first reinforcing rib plate 42 is spaced apart from the second reinforcing rib plate and is perpendicular to the ear plate 41. The direction from the first reinforcing rib plate 42 to the second reinforcing rib plate is perpendicular to the direction between the two ear plates 41. The third reinforcing rib plate 43 connects the first reinforcing rib plate 42 and the second reinforcing rib plate, and the third reinforcing rib plate 43 is also connected and fixed to the two ear plates 41. Finally, the strength of the support structure 4 is enhanced by the three reinforcing rib plates.

[0056] In addition, a plate 5 that fits into the rear axle housing body 3 can be provided between the two support plates 41, a plate 5 that fits into the rear axle housing body 3 can be provided on the outer side of the inspection port support ring 34, a plate 5 that fits into the rear axle housing body 3 can also be provided at the cap 26 of the box-type longitudinal arm structure, and a plate 5 that fits into the upper side plate 24 can also be provided on the edge of the air duct 28, so as to further enhance the strength, stability and safety of the structure.

[0057] This utility model also provides an electric wheel mining dump truck, including the rear axle housing of the electric wheel mining dump truck as described above.

[0058] Since the technological improvements and beneficial effects of the electric wheel mining dump truck are at least the same as those of the rear axle housing of the electric wheel mining dump truck, the electric wheel mining dump truck will not be described in detail here.

[0059] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include at least one of those features.

[0060] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A rear axle housing for an electric wheel mining dump truck, characterized in that, It includes a longitudinal arm support (1), a front longitudinal arm (2) and a rear axle housing body (3), wherein the longitudinal arm support (1), the front longitudinal arm (2) and the rear axle housing body (3) are connected in sequence, wherein the longitudinal arm support (1) is a casting, the front longitudinal arm (2) includes a box-type longitudinal arm structure, the rear axle housing body (3) is a cylindrical structure, and a first reinforcing structure is provided inside the rear axle housing body (3).

2. The rear axle housing of the electric wheel mining dump truck according to claim 1, characterized in that, The first reinforcing structure includes an axial stiffener (31) and a circumferential stiffener (32). The axial stiffener (31) extends along the axial direction of the rear axle housing body (3), and the circumferential stiffener (32) extends along the circumferential direction of the rear axle housing body (3). A plurality of axial stiffeners (31) are distributed sequentially along the circumferential direction of the rear axle housing body (3), and a plurality of circumferential stiffeners (32) are distributed sequentially along the axial direction of the rear axle housing body (3).

3. The rear axle housing of the electric wheel mining dump truck according to claim 2, characterized in that, Along the circumferential direction of the rear axle housing body (3), at least some of the axial stiffeners (31) are arranged at non-equidistant intervals; or / and, along the axial direction of the rear axle housing body (3), at least some of the circumferential stiffeners (32) are arranged at non-equidistant intervals.

4. The rear axle housing of the electric wheel mining dump truck according to claim 1, characterized in that, The box-type longitudinal arm structure includes a front side plate (21), a left side plate (22), a right side plate (23), an upper side plate (24), and a lower side plate (25). The front ends of the left side plate (22), the right side plate (23), the upper side plate (24), and the lower side plate (25) are respectively connected to the front side plate (21), and the rear ends of the left side plate (22), the right side plate (23), the upper side plate (24), and the lower side plate (25) are respectively connected to the rear axle housing body (3). In the direction from the front side plate (21) to the rear axle housing body (3), the interval between the left side plate (22) and the right side plate (23) gradually increases, and the interval between the upper side plate (24) and the lower side plate (25) gradually increases.

5. The rear axle housing of the electric wheel mining dump truck according to claim 4, characterized in that, The front side plate (21) is provided with a weight reduction hole (211). The longitudinal arm support (1) includes a support plate (11) and a support frame (12) connected together. The support frame (12) is used to connect with the vehicle body. The support plate (11) is connected to the front side plate (21) and covers the weight reduction hole (211). And / or, the front ends of the left side plate (22), the right side plate (23), the upper side plate (24) and the lower side plate (25) are all located within the edge of the front side plate (21). And / or, the upper ends of the left side plate (22) and the right side plate (23) are all located within the edge of the upper side plate (24), and the lower ends of the left side plate (22) and the right side plate (23) are all located within the edge of the lower side plate (25).

6. The rear axle housing of the electric wheel mining dump truck according to claim 4, characterized in that, The front longitudinal arm (2) also includes a duct (28) and a split air box (29). The rear axle housing body (3) is provided with air inlets (33) at both ends in its axial direction. The left side plate (22) and the right side plate (23) are respectively provided with split air inlets (27). One end of the duct (28) is connected to the upper side plate (24) and communicates with the internal space of the box-type longitudinal arm structure. The two split air boxes (29) are respectively provided on both sides of the box-type longitudinal arm structure. Each split air box (29) is connected to the corresponding split air inlet (27) and air inlet (33).

7. The rear axle housing of the electric wheel mining dump truck according to claim 6, characterized in that, The splitter box (29) has a first opening on the side facing the splitter air outlet (27), and the splitter box (29) has a second opening on the side facing the air inlet (33).

8. The rear axle housing of the electric wheel mining dump truck according to any one of claims 1-7, characterized in that... It also includes a support structure (4) disposed on the rear axle housing body (3). The support structure (4) includes two spaced-apart lug plates (41). The lug plate (41) includes a lug bottom edge (411) connected to the rear axle housing body (3). The two ends of the lug bottom edge (411) in the extending direction are welded to the rear axle housing body (3) to form a dovetail weld (412).

9. The rear axle housing of the electric wheel mining dump truck according to claim 8, characterized in that, The support structure (4) further includes a second reinforcing structure disposed between the two axle plates (41). The second reinforcing structure includes a first reinforcing rib plate (42), a second reinforcing rib plate, and a third reinforcing rib plate (43). The first reinforcing rib plate (42) and the second reinforcing rib plate are disposed at intervals between the two axle plates (41). The third reinforcing rib plate (43) is connected between the ends of the first reinforcing rib plate (42) and the second reinforcing rib plate away from the rear axle housing body (3).

10. An electric wheel mining dump truck, characterized in that, Includes the rear axle housing of the electric wheel mining dump truck as described in any one of claims 1-9.

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