Rear axle housing for electric drive dumper and dumper

Abstract

The rear axle housing comprises a winding drum, a plurality of ring ribs, a first rectangular rib, a second rectangular rib, a first arc-shaped rib, a second arc-shaped rib and a special-shaped rib, the ring ribs are fixedly connected to the inner wall of the winding drum and arranged in the circumferential direction of the axis of the winding drum, the two ends of the winding drum are fixedly connected with flanges respectively, and the flanges are connected with the special-shaped rib. The ring ribs comprise the first ring rib and the second ring rib, the first ring rib is arranged close to the flange, a first rectangular rib and a first arc-shaped rib are fixedly connected between the flange and the first ring rib, and a second rectangular rib, a second arc-shaped rib and a special-shaped rib are fixedly connected between the first ring rib and the second ring rib. And a second rectangular rib, a second arc-shaped rib and a special-shaped rib are fixedly connected between every two adjacent second ring ribs. According to the rear axle housing, the overall strength and rigidity of the rear axle housing can be improved, and the bearing capacity of a vehicle is improved. The utility model further relates to a dumper.

Description

Technical Field

[0001] This utility model relates to the field of mining truck technology, and in particular to a rear axle housing for an electric drive dump truck and the dump truck itself. Background Technology

[0002] Electric drive dump trucks are increasingly used in heavy-duty applications such as mining and construction. Their rear axle housings are crucial components for bearing and transmitting the vehicle's weight and power, and must possess sufficient strength and rigidity. For example... Figure 1 As shown, the inner wall of the traditional rear axle housing drum 21 is provided with multiple ribs 22, and multiple evenly spaced arc-shaped stiffeners 23 are distributed between the ribs 22. During long-term use, deformation and stress concentration problems are prone to occur, resulting in insufficient structural strength and shortened service life. In addition, the simple design of the position and shape of the stiffeners leads to low material utilization and cannot fully exert their reinforcement effect, thus the rear axle housing is still prone to fatigue damage and fracture problems. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a rear axle housing for an electric drive dump truck, which can solve the problems existing in the prior art, improve the overall strength and rigidity of the rear axle housing, and increase the load-bearing capacity of the vehicle.

[0004] This utility model provides a rear axle housing for an electric drive dump truck, comprising a drum, multiple ribs, a first rectangular rib, a second rectangular rib, a first arcuate rib, a second arcuate rib, and a shaped rib. Each of the ribs is fixedly connected to the inner wall of the drum and is arranged circumferentially around the axis of the drum. Flanges are fixedly connected to both ends of the drum. The ribs include a first rib and a second rib. The first rib is located close to the flange. The first rectangular rib and the first arcuate rib are fixedly connected between the flange and the first rib. The second rectangular rib, the second arcuate rib, and the shaped rib are fixedly connected between the first rib and the second rib. The second rectangular rib, the second arcuate rib, and the shaped rib are fixedly connected between two adjacent second ribs.

[0005] In one embodiment, there are two first ring ribs. A first reinforcing zone is formed between the flange at one end of the drum and one of the first ring ribs. A fifth reinforcing zone is formed between the flange at the other end of the drum and another of the first ring ribs. There are at least two second ring ribs. A second reinforcing zone is formed between one of the first ring ribs and the second ring ribs. The second reinforcing zone is located close to the first reinforcing zone. A third reinforcing zone is formed between each adjacent second ring rib. A fourth reinforcing zone is formed between the second ring rib and another of the first ring ribs. The fourth reinforcing zone is located close to the fifth reinforcing zone. The first rectangular rib and the first arcuate rib are located in the first reinforcing zone. The second reinforcing zone, the third reinforcing zone, the fourth reinforcing zone, and the fifth reinforcing zone are respectively provided with the second rectangular rib, the second arcuate rib, and the irregular rib. The irregular rib is fixedly connected to the rectangular rib and the second ring rib.

[0006] In one embodiment, the roll includes a support portion and a top disposed in a radial direction, the support portion being fixedly connected to the top, the support portion being fixedly connected to a first rectangular rib, a second rectangular rib, a first arcuate rib, and a second arcuate rib, and the top being fixedly connected to a first rectangular rib, a second rectangular rib, and the irregular rib.

[0007] In one embodiment, the drum is provided with an inspection door, which is disposed through the inner wall and the outer wall of the drum. The inspection door is located in the second reinforcing zone, the third reinforcing zone and the fourth reinforcing zone, and is located at the connection between the bearing part and the top.

[0008] In one embodiment, the first arcuate rib and the second arcuate rib are respectively disposed at the end of the bearing portion that is radially away from the inspection door.

[0009] In one embodiment, the rear axle housing further includes a plurality of transverse ribs, each of which is fixedly connected to the first reinforcing area, the second reinforcing area, the fourth reinforcing area, and the fifth reinforcing area. The transverse ribs are respectively located on the left and right sides of the inspection door, and the left and right sides are arranged along the axial direction of the drum.

[0010] In one embodiment, the transverse ribs of the first reinforcing zone and the fifth reinforcing zone are aligned, and the transverse ribs of the second reinforcing zone and the fourth reinforcing zone are aligned.

[0011] In one embodiment, at least a portion of the second rectangular ribs are aligned with the first rectangular ribs; and / or at least a portion of the second rectangular ribs in the third reinforcing region and at least a portion of the second rectangular ribs in the fourth reinforcing region are aligned with the second rectangular ribs in the second reinforcing region, and at least a portion of the second rectangular ribs in the fifth reinforcing region are aligned with the first rectangular ribs in the first reinforcing region.

[0012] In one embodiment, the number of second rectangular ribs in the second reinforcing zone, the number of second rectangular ribs in the third reinforcing zone, and the number of second rectangular ribs in the fourth reinforcing zone are all less than the number of first rectangular ribs in the first reinforcing zone; and the number of second rectangular ribs in the second reinforcing zone, the number of second rectangular ribs in the third reinforcing zone, and the number of second rectangular ribs in the fourth reinforcing zone are all less than the number of second rectangular ribs in the fifth reinforcing zone.

[0013] This utility model also relates to a dump truck, including the aforementioned rear axle housing for an electric drive dump truck.

[0014] This utility model's rear axle housing incorporates reinforcing ribs of different specifications and shapes, including rectangular ribs, arc-shaped ribs, transverse ribs, and irregular ribs, to accommodate different loads in different areas of the rear axle housing during actual use. Distributing these ribs according to varying stress conditions effectively improves space utilization. Furthermore, the different shapes of the reinforcing ribs can disperse and absorb stresses from different directions, reducing stress concentration and enhancing the structure's bending and torsional resistance. This significantly strengthens the structural strength and rigidity of the rear axle housing, extending its service life. By arranging reinforcing ribs of different specifications, structural optimization can be achieved, saving materials while ensuring structural performance, thus improving the economy and rationality of the rear axle housing structure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of the rear axle housing in the prior art.

[0017] Figure 2 This is a structural schematic diagram of the rear axle housing of this utility model.

[0018] Figure 3 This is a side view of the rear axle housing of this utility model.

[0019] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure at point AA.

[0020] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional structure at point BB.

[0021] Explanation of reference numerals: First reinforced zone - 101; Second reinforced zone - 102; Third reinforced zone - 103; Fourth reinforced zone - 104; Fifth reinforced zone - 105; Inspection door - 106; Roller - 11; Flange - 111; Bearing section - 112; Top - 113; Inner wall - 11a; Outer wall - 11b; First ring rib - 121; First ring rib - 122; First rectangular rib - 131; Second rectangular rib - 132; First arc-shaped rib - 141; Second arc-shaped rib - 142; Irregular rib - 15; Horizontal rib - 16. Detailed Implementation

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, 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] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0026] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0027] like Figures 2 to 5As shown, the rear axle housing is an important component of the vehicle's drive axle. Its main function is to support and protect internal transmission components, such as the differential, half-shafts, and gears. It also bears the weight of the rear of the vehicle and transmits driving force to the rear wheels. Therefore, the rear axle housing for an electric drive dump truck includes a drum 11, multiple ribs, a first rectangular rib 131, a second rectangular rib 132, a first arc-shaped rib 141, a second arc-shaped rib 142, and irregular ribs 15. Each rib is fixedly connected to the inner wall 11a of the drum 11, and each rib is circumferentially arranged around the axis of the drum 11. Flanges 111 are fixedly connected to both ends of the rib. The ribs include a first rib 121 and a second rib 122. The first rib 121 is located close to the flange. A first rectangular rib 131 and a first arcuate rib 141 are fixedly connected between the flange 111 and the first rib 121. A second rectangular rib 132, a second arcuate rib 142 and a special-shaped rib 15 are fixedly connected between the first rib 121 and the second rib 122. A second rectangular rib 132, a second arcuate rib 142 and a special-shaped rib 15 are fixedly connected between two adjacent second ribs 122. In this embodiment, at least four ribs are provided, with two first ribs 121 and at least two second ribs 122. This embodiment uses four ribs as an example. The four ribs are evenly spaced along the axial direction of the inner wall 11a of the drum 11 to improve the overall rigidity and strength of the rear axle housing. There are two first ribs 121 and two second ribs 122. Depending on the stress conditions, rectangular ribs, arc ribs, and irregular ribs 15 of different specifications are provided between the flange 111 and the first ribs 121, and between each two adjacent second ribs 122. Different specifications refer to different sizes or different thicknesses. Each rectangular rib is fixedly connected to the inner wall 11a of the drum 11 by welding. The welded rectangular ribs are arranged in a matrix on the cross-section of the drum 11, and a hollow structure is formed between the rectangular ribs and the drum 11. It is understood that the rectangular ribs, arc-shaped ribs, and irregular-shaped ribs 15 in this embodiment are all reinforcing ribs, made of rigid materials, used to increase the rigidity and strength of the drum 11. The irregular-shaped rib 15 is an irregularly shaped reinforcing rib.

[0028] like Figure 2 , Figure 4 and Figure 5As shown, a first reinforcing region 101 is formed between the flange 111 at one end of the drum 11 and a first reinforcing rib 121. A fifth reinforcing region 105 is formed between the flange 111 at the other end of the drum 11 and another first reinforcing rib 121. A second reinforcing region 102 is formed between a first reinforcing rib 121 and a second reinforcing rib 122. The second reinforcing region 102 is located close to the first reinforcing region 101. A third reinforcing region 103 is formed between adjacent second reinforcing ribs 122. A fourth reinforcing region 104 is formed between a second reinforcing rib 122 and another first reinforcing rib 121. The fourth reinforcing region 104 is located close to the fifth reinforcing region 105. The second reinforcing region 102 and the third reinforcing rib 103 form a third reinforcing region 103. Zone 103 and the fourth reinforcing zone 104 are located between the first reinforcing zone 101 and the fifth reinforcing zone 105. The first reinforcing zone 101, the second reinforcing zone 102, the third reinforcing zone 103, the fourth reinforcing zone 104 and the fifth reinforcing zone 105 are arranged sequentially along the axis of the drum 11. The first rectangular rib 131 and the first arcuate rib 141 are located in the first reinforcing zone 101. The second reinforcing zone 102, the third reinforcing zone 103, the fourth reinforcing zone 104 and the fifth reinforcing zone 105 are respectively provided with the second rectangular rib 132, the second arcuate rib 142 and the irregular rib 15. The irregular rib 15 is fixedly connected to the second rectangular rib 132 and the second ring rib 122. In this embodiment, since the two ends of the drum 11 bear a large torque and the rectangular ribs are difficult to process, multiple first rectangular ribs 131 are fixedly connected in the first reinforcing zone 101 and multiple second rectangular ribs 132 are fixedly connected in the fifth reinforcing zone 105 to provide stronger rigidity and strength. In the second reinforcing zone 102, the third reinforcing zone 103 and the fourth reinforcing zone 104, the second rectangular ribs 132 and the irregular ribs 15 are used in combination to reduce the number of second rectangular ribs 132 and reduce the processing difficulty.

[0029] like Figures 3 to 5As shown, the drum 11 includes a support portion 112 and a top 113 arranged in the radial direction. The support portion 112 and the top 113 are fixedly connected to form a columnar hollow structure of the drum 11. The support portion 112 is fixedly connected with a first rectangular rib 131, a second rectangular rib 132, a first arcuate rib 141 and a second arcuate rib 142. The top 113 is fixedly connected with a first rectangular rib 131, a second rectangular rib 132 and an irregular rib 15. It is understood that in this embodiment, the load-bearing part 112 and the top 113 are an integral structure. The load-bearing part 112 is used to bear the vehicle load and the impact force and torque during vehicle movement. When the vehicle is driving on uneven road surfaces or in off-road conditions, the uneven contact between the wheels and the ground will cause the load-bearing part 112 of the drum 11 to bear a large torque. In addition, on bumpy road sections, the load-bearing part 112 of the drum 11 will bear a large impact force. Therefore, the load-bearing part 112 is provided with multiple first rectangular ribs 131, second rectangular ribs 132, first arc-shaped ribs 141 and second arc-shaped ribs 142 to improve strength and fatigue resistance. Since the top 113 needs to bear less force, the first rectangular ribs 131, second rectangular ribs 132 and irregular ribs 15 are used to connect the top 113, which not only reduces the difficulty of processing, but also avoids material waste. It is understood that the irregular rib 15 is fixedly connected to the second reinforcing zone 102, the third reinforcing zone 103 and the fourth reinforcing zone 104 of the top 113. At the same time, the end of the irregular rib 15 in the second reinforcing zone 102 is aligned with the end of the first rectangular rib 131 and adjacent irregular ribs 15 are aligned with each other. The end of the irregular rib 15 in the fourth reinforcing zone 104 is aligned with the end of the second rectangular rib 132 in the fifth reinforcing zone 105.

[0030] like Figure 2 As shown, the drum 11 is provided with an inspection door 106, which penetrates the inner wall 11a and outer wall 11b of the drum 11. The inspection door 106 has a circular hole structure and is located in the middle of the drum 11, that is, at the second reinforcing zone 102, the third reinforcing zone 103 and the fourth reinforcing zone 104, and at the connection between the bearing part 112 and the top 113. The first arc-shaped rib 141 and the second arc-shaped rib 142 are located at the radial end of the bearing part 112 away from the inspection door 106. The first arc-shaped rib 141 is welded to the rectangular rib 13 and the first ring rib 121, and the second arc-shaped rib 142 is welded to the rectangular rib 13 and the second ring rib 122. Both the first arc-shaped rib 141 and the second arc-shaped rib 142 are arc-shaped structures that are thin in the middle and thick at both ends, which can improve stress excess, reduce stress concentration, and increase the impact resistance of the bearing part 112.

[0031] like Figure 2 and Figure 4As shown, to prevent deformation of the inspection door 106, the rear axle housing also includes multiple transverse ribs 16. Each transverse rib 16 is fixedly connected to the first reinforcing zone 101, the second reinforcing zone 102, the fourth reinforcing zone 104, and the fifth reinforcing zone 105. The transverse ribs 16 are respectively located on the left and right sides of the inspection door 106, and are arranged along the axial direction of the drum 11 to improve axial stiffness and strength. This symmetrical arrangement of transverse ribs 16 on the left and right sides helps maintain structural balance, reduces local stress concentration, and facilitates maintenance. The transverse ribs 16 in the first reinforcing zone 101 and the fifth reinforcing zone 105 are aligned, and the transverse ribs 16 in the second reinforcing zone 102 and the fourth reinforcing zone 104 are aligned to improve the structural stability around the inspection door 106, reduce stress concentration, and improve the overall performance of the rear axle housing. Preferably, there are three or four horizontal ribs 16 in the same reinforcing zone, and the horizontal ribs 16 in the same reinforcing zone are evenly spaced apart. The horizontal ribs 16 are plate-shaped or strip-shaped structures.

[0032] like Figure 5 As shown, some of the second rectangular ribs 132 are aligned with the first rectangular ribs 131; some of the second rectangular ribs 132 in the third reinforcing zone 103 and some of the second rectangular ribs 132 in the fourth reinforcing zone 104 are aligned with the second rectangular ribs 132 in the second reinforcing zone 102, respectively; and some of the second rectangular ribs 132 in the fifth reinforcing zone 105 are aligned with the first rectangular ribs 131 in the first reinforcing zone 101.

[0033] In another preferred embodiment, the second rectangular rib 132 is aligned with the first rectangular rib 131 of the first reinforcing area 101.

[0034] Preferably, under torsional conditions, the two end faces of the drum 11 bear a greater torque. Torsional conditions refer to the situation where, during vehicle operation, uneven road surfaces or unbalanced torque transmitted from the suspension system to the frame cause a torque difference between the front and rear wheels or left and right wheels, resulting in torsional deformation of the entire vehicle. Therefore, the number of second rectangular ribs 132 in the second reinforcing zone 102, the third reinforcing zone 103, and the fourth reinforcing zone 104 is less than the number of first rectangular ribs 131 in the first reinforcing zone 101; the number of second rectangular ribs 132 in the second reinforcing zone 102, the third reinforcing zone 103, and the fourth reinforcing zone 104 is less than the number of second rectangular ribs 132 in the fifth reinforcing zone 105. By providing more first rectangular ribs 131 in the first reinforcing zone 101 and more second rectangular ribs 132 in the fifth reinforcing zone 105, the structural strength of the drum 11 is increased.

[0035] The rear axle housing of this invention is equipped with reinforcing ribs of different specifications and shapes, namely rectangular ribs, arc-shaped ribs, transverse ribs 16, and irregular ribs 15, etc., according to the different loads borne by different areas of the rear axle housing in actual use. The distribution of reinforcing ribs of different shapes according to different stress conditions effectively improves the space utilization rate. Moreover, the reinforcing ribs of different shapes can disperse and absorb stress in different directions, reduce stress concentration, enhance the bending and torsional performance of the structure, significantly enhance the structural strength and rigidity of the rear axle housing, and extend the service life of the rear axle housing. By arranging reinforcing ribs of different specifications, the structure can be optimized, which saves materials, ensures structural performance, and improves the economy and rationality of the rear axle housing structure.

[0036] This utility model also relates to a dump truck, including the aforementioned rear axle housing for an electric drive dump truck.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A rear axle housing for an electrically driven dump truck, characterized in that The device includes a drum (11), multiple ribs, a first rectangular rib (131), a second rectangular rib (132), a first arcuate rib (141), a second arcuate rib (142), and an irregular rib (15). Each of the ribs is fixedly connected to the inner wall (11a) of the drum (11). Each of the ribs is arranged circumferentially around the axis of the drum (11). Flanges (111) are fixedly connected to both ends of the drum (11). The ribs include a first rib (121) and a second rib (122). The first rib (121) is close to the flange (111). 11) The flange (111) and the first ring rib (121) are respectively fixedly connected by the first rectangular rib (131) and the first arc rib (141), the first ring rib (121) and the second ring rib (122) are respectively fixedly connected by the second rectangular rib (132), the second arc rib (142) and the irregular rib (15), and adjacent two second ring ribs (122) are fixedly connected by the second rectangular rib (132), the second arc rib (142) and the irregular rib (15).

2. The rear axle housing for an electrically driven dump truck of claim 1, wherein, Two first reinforcing ribs (121) are provided. A first reinforcing zone (101) is formed between the flange (111) at one end of the drum (11) and one of the first reinforcing ribs (121). A fifth reinforcing zone (105) is formed between the flange (111) at the other end of the drum (11) and another of the first reinforcing ribs (121). At least two second reinforcing ribs (122) are provided. A second reinforcing zone (102) is formed between one of the first reinforcing ribs (121) and the second reinforcing rib (122). The second reinforcing zone (102) is located close to the first reinforcing zone (101). A third reinforcing zone (103) is formed between each adjacent second reinforcing rib (122). A fourth reinforcing zone (104) is formed between the second ring rib (122) and another first ring rib (121). The fourth reinforcing zone (104) is located close to the fifth reinforcing zone (105). The first rectangular rib (131) and the first arcuate rib (141) are located in the first reinforcing zone (101). The second reinforcing zone (102), the third reinforcing zone (103), the fourth reinforcing zone (104) and the fifth reinforcing zone (105) are respectively provided with the second rectangular rib (132), the second arcuate rib (142) and the irregular rib (15). The irregular rib (15) is fixedly connected to the rectangular rib (13) and the second ring rib (122).

3. The rear axle housing for an electrically driven dump truck of claim 2, wherein, The drum (11) includes a support portion (112) and a top (113) arranged in a radial direction. The support portion (112) is fixedly connected to the top (113). The support portion (112) is fixedly connected with the first rectangular rib (131), the second rectangular rib (132), the first arc rib (141), and the second arc rib (142). The top (113) is fixedly connected with the first rectangular rib (131), the second rectangular rib (132), and the irregular rib (15).

4. The rear axle housing for an electrically driven dump truck of claim 3, wherein, The drum (11) is provided with an inspection door (106), which is provided through the inner wall (11a) and outer wall (11b) of the drum (11). The inspection door (106) is located in the second reinforcing zone (102), the third reinforcing zone (103) and the fourth reinforcing zone (104). The inspection door (106) is located at the connection between the bearing part (112) and the top (113).

5. The rear axle housing for an electrically driven dump truck of claim 4, wherein, The first arc-shaped rib (141) and the second arc-shaped rib (142) are respectively provided at one end of the bearing part (112) in the radial direction away from the inspection door (106).

6. The rear axle housing for an electrically driven dump truck of claim 4, wherein, The rear axle housing also includes a plurality of transverse ribs (16), each of which is fixedly connected to the first reinforcing area (101), the second reinforcing area (102), the fourth reinforcing area (104) and the fifth reinforcing area (105). The transverse ribs (16) are respectively located on the left and right sides of the inspection door (106), and the left and right sides are arranged along the axial direction of the drum (11).

7. A rear axle housing for an electrically driven dump truck as defined in claim 6, characterized in that The transverse ribs (16) of the first reinforcing zone (101) and the transverse ribs (16) of the fifth reinforcing zone (105) are aligned, and the transverse ribs (16) of the second reinforcing zone (102) and the transverse ribs (16) of the fourth reinforcing zone (104) are aligned.

8. The rear axle housing for an electrically driven dump truck of claim 2, wherein, At least a portion of the second rectangular ribs (132) are respectively aligned with the first rectangular ribs (131); The second rectangular ribs (132) of at least part of the third reinforcing zone (103) and the second rectangular ribs (132) of at least part of the fourth reinforcing zone (104) are respectively aligned with the second rectangular ribs (132) of the second reinforcing zone (102), and the second rectangular ribs (132) of at least part of the fifth reinforcing zone (105) are aligned with the first rectangular ribs (131) of the first reinforcing zone (101).

9. The rear axle housing for an electrically driven dump truck of claim 2, wherein, The number of second rectangular ribs (132) in the second reinforcing zone (102), the number of second rectangular ribs (132) in the third reinforcing zone (103), and the number of second rectangular ribs (132) in the fourth reinforcing zone (104) are all less than the number of first rectangular ribs (131) in the first reinforcing zone (101); the number of second rectangular ribs (132) in the second reinforcing zone (102), the number of second rectangular ribs (132) in the third reinforcing zone (103), and the number of second rectangular ribs (132) in the fourth reinforcing zone (104) are all less than the number of second rectangular ribs (132) in the fifth reinforcing zone (105).

10. A dump truck characterized by Includes the rear axle housing for an electric drive dump truck as described in any one of claims 1 to 9.

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