Power distribution type mine truck electric drive axle and vehicle

Abstract

The embodiment of the utility model provides a power distribution type mine truck electric drive axle and a vehicle, and the power distribution type mine truck electric drive axle comprises an electric drive axle housing, two drive motors, two two-gear reduction gearboxes and two mine truck drive axle wheel end structures, a motor output shaft of the driving motor is in transmission connection with a second speed reducing mechanism shaft through a first gear speed reducing mechanism, and the second speed reducing mechanism shaft is in transmission connection with a third speed reducing mechanism shaft through a second gear speed reducing mechanism or a third gear speed reducing mechanism. The second gear reduction mechanism is located between the first gear reduction mechanism and the third gear reduction mechanism, the second gear reduction mechanism and the third gear reduction mechanism are connected through a gear shifting mechanism, the gear shifting mechanism is located on a third reduction mechanism shaft, and the third reduction mechanism shaft is in transmission connection with a sun wheel shaft of the first-stage planetary reducer; the two ends of the drive axle half shaft are in transmission connection with a planet carrier of the first-stage planetary reducer and a sun wheel shaft of the second-stage planetary reducer respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a power-distributed mining truck electric drive axle and a vehicle. Background Art

[0002] The electric drive axle is a mechanism at the end of the drive train that changes the speed and torque from the transmission and transmits them to the drive wheels. It is generally composed of a bridge housing, a speed reducer, a differential, and a wheel drive system. The drive axle also needs to withstand vertical, longitudinal, and lateral forces acting between the road surface and the frame or body, as well as braking torque and reaction forces. Current mining truck models are mainly concentrated in payloads below 100 tons. However, with the expansion of large-scale open-pit mines in China and the regulation of environmental protection requirements, future mining truck models will inevitably develop in the direction of large tonnage, electrification, and intelligence. However, the electric drive axle structure in existing technologies is not well adapted to the power requirements of large-tonnage mining trucks. Utility Model Content

[0003] The present application provides a power-distributed electric drive axle for mining trucks and a vehicle, which solves the problem that electric drive axles in the prior art cannot be well adapted to the power requirements of large-tonnage mining trucks.

[0004] In a first aspect, according to an embodiment of the present application, a power-distributed mining truck electric drive axle is provided, comprising: an electric drive axle housing, two drive motors, two two-speed reduction gearboxes, and two mining truck drive axle wheel-end structures, wherein the housings of the two two-speed reduction gearboxes and the two drive motors are respectively fixedly disposed on the outer surface of the electric drive axle housing, and the two mining truck drive axle wheel-end structures are respectively disposed at opposite ends of the electric drive axle housing, and the two drive motors are respectively connected to one mining truck drive axle wheel-end structure via one of the two-speed reduction gearboxes;

[0005] Each of the two-speed reduction gearboxes comprises a first gear reduction mechanism, a second gear reduction mechanism, a third gear reduction mechanism, a second shaft of the reduction mechanism, a third shaft of the reduction mechanism, a shift mechanism, and a first-stage planetary reducer. The motor output shaft of the drive motor is connected to the second shaft of the reduction mechanism via the first gear reduction mechanism. The second shaft of the reduction mechanism is connected to the third shaft of the reduction mechanism via the second gear reduction mechanism or the third gear reduction mechanism. In the axial direction of the second shaft of the reduction mechanism, the second gear reduction mechanism is located between the first gear reduction mechanism and the third gear reduction mechanism, and the second gear reduction mechanism and the third gear reduction mechanism are connected via the shift mechanism. The shift mechanism is located on the third shaft of the reduction mechanism, and the third shaft of the reduction mechanism is connected to the sun gear shaft of the first-stage planetary reducer via the shift mechanism.

[0006] Each of the mining truck drive axle wheel end structures includes a hub assembly, a drive axle half shaft, a secondary planetary reducer and a brake structure. The two ends of the drive axle half shaft are respectively connected to the planet carrier of the primary planetary reducer and the sun gear shaft of the secondary planetary reducer. The planet carrier of the secondary planetary reducer is connected to the hub assembly. The brake structure is fixedly arranged outside the electric drive axle housing, and there is a fixed gap between the hub assembly assembled corresponding to it.

[0007] In some embodiments of the present application, in each pair of the drive motor and the two-speed reduction gearbox, the motor output shaft, the second shaft of the reduction mechanism, and the third shaft of the reduction mechanism are all arranged parallel to each other.

[0008] In some embodiments of the present application, the first gear reduction mechanism includes a first driving gear and a first driven gear that are meshed with each other, the first driving gear is fixedly provided on the motor output shaft, the first driven gear is fixedly provided on the second shaft of the reduction mechanism, and the number of teeth of the first driving gear is less than the number of teeth of the first driven gear.

[0009] In some embodiments of the present application, the second gear reduction mechanism includes a second driving gear and a second driven gear that are meshed with each other, the second driving gear is fixedly arranged on the second shaft of the reduction mechanism, the second driven gear is fixedly arranged on the third shaft of the reduction mechanism, and the number of teeth of the second driving gear is less than the number of teeth of the second driven gear.

[0010] In some embodiments of the present application, the third gear reduction mechanism includes a third driving gear and a third driven gear that are meshed with each other, the third driving gear is fixedly arranged on the second shaft of the reduction mechanism, the third driven gear is fixedly arranged on the third shaft of the reduction mechanism, and the number of teeth of the third driving gear is less than the number of teeth of the third driven gear.

[0011] In some embodiments of the present application, it further includes: two speed sensors, each of which is respectively arranged on the three axes of the reduction mechanism of one of the two-speed reduction gearboxes.

[0012] In some embodiments of the present application, the two drive motors and the two two-speed reduction gearboxes are arranged in mirror symmetry.

[0013] In some embodiments of the present application, the electric drive axle housing is an integral cast axle housing.

[0014] In some embodiments of the present application, each of the drive motors is a high-speed water-cooled flat wire motor.

[0015] In some embodiments of the present application, the first-stage planetary reducer includes a first-stage sun gear, a first-stage planetary gear and the first-stage planetary carrier, and the first-stage planetary gear is supported on the first-stage planetary carrier and rotates around the first-stage sun gear.

[0016] In some embodiments of the present application, the secondary planetary reducer includes a secondary sun gear, a secondary planetary gear and the secondary planet carrier, and the secondary planetary gear is supported on the secondary planet carrier and rotates around the secondary sun gear.

[0017] In a second aspect, according to an embodiment of the present application, a vehicle is provided, comprising: the power-distributed mining truck electric drive axle described in the first aspect.

[0018] The beneficial effects of the embodiments of the present application are as follows:

[0019] This distributed-power mining truck electric drive axle utilizes a dual-motor architecture, halving the power and torque required by each drive motor. The use of high-speed motors effectively reduces the size and cost of the motors, ensuring chassis layout space and overall manufacturing costs for the entire axle. The two-speed gearbox offers a wide range of reduction ratios and high torque output, while also ensuring the maximum speed and torque output of the entire axle, meeting the maximum speed and grade-climbing requirements of large-tonnage pure electric mining trucks. Furthermore, the left and right wheels of this distributed-power mining truck electric drive axle are driven independently, without affecting each other. The gearbox shaft only bears half the torque output of the entire axle, effectively extending the fatigue life of the shaft. Furthermore, the electric drive axle housing utilizes a one-piece construction, significantly improving assembly process compared to bolted split axle housings. Furthermore, for the same weight, the housing is more rigid, improving the load-bearing capacity of the entire axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of the structure of a power-distributed mining truck electric drive axle provided in an embodiment of the present application, wherein (a) is a schematic diagram of the structure from a first perspective, and (b) is a schematic diagram of the structure from a second perspective;

[0022] Figure 2 A schematic cross-sectional view of an electric drive axle for a power-distributed mining truck provided in an embodiment of the present application;

[0023] Figure 3A simplified structural diagram of a power-distributed mining truck electric drive axle provided in an embodiment of the present application;

[0024] Figure 4 A simplified structural diagram of a group of drive motors, a two-speed reduction gearbox, and a wheel-end structure of a mining truck drive axle in a power-distributed mining truck electric drive axle provided in an embodiment of the present application;

[0025] Figure 5 A schematic structural diagram of a two-speed reduction gearbox provided in an embodiment of the present application;

[0026] Explanation of the accompanying drawings: 1 is the electric drive axle housing, 2 is the drive motor, 21 is the motor output shaft, 3 is the two-speed reduction box, 31 is the first gear reduction mechanism, 311 is the first driving gear, 312 is the first driven gear, 32 is the second gear reduction mechanism, 321 is the second driving gear, 322 is the second driven gear, 33 is the third gear reduction mechanism, 331 is the third driving gear, 332 is the third driven gear, 34 is the second shaft of the reduction mechanism, 35 is the third shaft of the reduction mechanism, 36 is the shift mechanism, 37 is the first-stage planetary reducer, 371 is the first-stage sun gear, 372 is the first-stage planetary gear, 373 is the first-stage planetary carrier, 38 is the box body, 4 is the wheel end structure of the mining truck drive axle, 41 is the wheel hub assembly, 42 is the drive axle half shaft, 43 is the second-stage planetary reducer, 431 is the second-stage sun gear, 432 is the second-stage planetary gear, and 433 is the second-stage planetary carrier. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this utility model.

[0028] It should be noted that the terms "including," "having," and any variations thereof in the embodiments and drawings of this application are intended to cover non-exclusive inclusions. For example, "including" is not limited to the listed structures, but may optionally include structures not listed, or may optionally include other components inherent to those structures.

[0029] The present application discloses a distributed power electric drive axle for mining trucks, which can meet the power performance and speed requirements of large-tonnage mining trucks. Detailed descriptions are provided below.

[0030] Figure 1 – Figure 5 A power-distributed mining truck electric drive axle according to an embodiment of the present application is shown. Figure 1 – Figure 5As shown, the power-distributed mining truck electric drive axle mainly includes: an electric drive axle housing 1, two drive motors 2, two two-speed reduction gearboxes 3, and two mining truck drive axle wheel-end structures 4. The two drive motors 2 are used to drive the wheel sides on both sides through a two-speed reduction gearbox 3 respectively. The power of the left and right wheel sides does not interfere with each other. Even if any one of the drive motors 2 or the two-speed reduction gearbox 3 fails, it will not affect the normal operation of the other drive motors 2 and the two-speed reduction gearbox 3. Specifically, the housing 38 of the two two-speed reduction gearboxes 3 and the two drive motors 2 are respectively fixedly arranged on the outer surface of the electric drive axle housing 1, and the two mining truck drive axle wheel-end structures 4 are respectively arranged at opposite ends of the electric drive axle housing 1, that is, a mining truck drive axle wheel-end structure 4 is respectively arranged on the wheel sides of both sides, and the two drive motors 2 are respectively connected to a mining truck drive axle wheel-end structure 4 through a two-speed reduction gearbox 3 to drive the wheel sides on both sides respectively. A drive motor 2 and a two-speed reduction gearbox 3 are arranged on one side of the power-distributed mining truck electric drive axle, which meets the power requirements of the entire vehicle while having a simple mechanical structure, facilitates the layout of the entire axle and the entire vehicle chassis, and reduces the probability of failure of mechanical components.

[0031] In the embodiments of this application, Figure 2 、 Figure 4 and Figure 5As shown, each two-speed reduction gearbox 3 includes a first gear reduction mechanism 31, a second gear reduction mechanism 32, a third gear reduction mechanism 33, a second reduction gear shaft 34, a third reduction gear shaft 35, a shift mechanism 36, and a first-stage planetary reducer 37, forming a three-shaft, three-stage reduction, two-speed structure. The motor output shaft 21 of the drive motor 2 is connected to the second reduction gear shaft 34 via the first gear reduction mechanism 31. The second reduction gear shaft 34 is connected to the third reduction gear shaft 35 via the second gear reduction mechanism 32 or the third gear reduction mechanism 33. The third reduction gear shaft 35 is connected to the first-stage sun gear shaft of the first-stage planetary reducer 37. Each mining truck drive axle wheel end structure 4 includes a hub assembly 41, a drive axle half shaft 42, a secondary planetary reducer 43 and a brake structure (not shown in the figure). The two ends of the drive axle half shaft 42 are respectively connected to the primary planetary carrier 373 of the primary planetary reducer 37 and the secondary sun gear shaft of the secondary planetary reducer 43. That is, the primary planetary reducer 37 and the secondary planetary reducer 43 in the power distributed mining truck electric drive axle are connected through the drive axle half shaft 42. The drive axle half shaft 42 serves as the output end of the two-speed reduction gearbox 3 to transmit power to the secondary planetary reducer 43 at the wheel end. The secondary planetary reducer 43 is responsible for driving the electric drive axle assembly, and its secondary planetary carrier 433 is connected to the hub assembly 41. After being decelerated by the fixed first gear reduction mechanism 31, the torque of the high-speed drive motor 2 is transmitted to the second shaft 34 of the reduction mechanism, and then transmitted from the second shaft 34 of the reduction mechanism to the third shaft 35 of the reduction mechanism through the optional two-speed gear (i.e., the second gear reduction mechanism 32 and the third gear reduction mechanism 33). The first-stage sun gear 371 of the first-stage planetary reducer 37 is rigidly connected to the third shaft 35 of the reduction mechanism. After passing through the first-stage planetary reducer 37, the torque is transmitted to the second-stage planetary reducer 43 through the drive axle half shaft 42. The second-stage planetary reducer 43 is connected to the hub assembly 41, so that the torque and speed of each drive motor 2 are output to the wheel end structure 4 of the mine truck drive axle on one side through the two-speed reduction box 3 for single-sided wheel drive. Among them, the second-stage planetary reducer 43 in the power distributed mine truck electric drive axle is placed on the wheel side, which is more conducive to its cooling and heat dissipation, thereby increasing its service life. Furthermore, the braking structure (i.e., the driving / parking brake) is fixedly mounted on the exterior of the electric drive axle housing 1, creating a fixed gap between the corresponding rotating hub assembly 41. During operation, the braking structure decelerates, brakes, and parks the rotating hub assembly 41 and the electric drive axle assembly through friction. In practice, the braking structure can utilize either a drum brake or a wet brake. The vehicle's suspension can be configured with either a leaf spring or a hydro-pneumatic suspension, providing a high degree of adaptability and versatility.

[0032] The first gear reduction mechanism 31 is a fixed gear structure, which is used to reduce the power input from the drive motor 2 in the first stage. The reduction mechanism of the embodiment of the present application adopts a two-speed shiftable design, which reduces the number of gears and transmission gear sets of the reduction mechanism. It can meet the vehicle's climbing power performance and maximum speed requirements. While meeting the vehicle's usage requirements, the mechanical structure design is streamlined, reducing product price and the probability of failure. In detail, the second gear reduction mechanism 32 is the second gear structure of the two-speed reduction box 3, and the third gear reduction mechanism 33 is the first gear structure of the two-speed reduction box 3. In the axial direction of the second shaft 34 of the reduction mechanism, the second gear reduction mechanism 32 is located between the first gear reduction mechanism 31 and the third gear reduction mechanism 33, and the second gear reduction mechanism 32 and the third gear reduction mechanism 33 are connected by a shift mechanism 36. The shift mechanism 36 is located on the third shaft 35 of the reduction mechanism, so that the gear is switched through the shift mechanism 36. The first gear meets the heavy-load climbing requirements of the whole vehicle, and the second gear meets the maximum speed requirements of the whole vehicle. The reduction ratio range is wide and the output torque is large. At the same time, the maximum speed and maximum output torque of the whole bridge are guaranteed, which can meet the power performance and speed requirements of large-tonnage mining trucks.

[0033] In some embodiments, as Figure 1 – Figure 4 As shown, the two drive motors 2 and the two two-speed reduction gearboxes 3 are arranged in a mirror-symmetrical manner. The power is transmitted from the drive motor 2 to the two-speed reduction gearbox 3, and then transmitted to the secondary planetary reducer 43 on the single-side wheel side through the drive axle half shaft 42, and then the secondary planetary reducer 43 is used to realize the drive of the electric drive axle assembly. In a specific embodiment, the electric drive axle housing 1 can be an integral cast axle housing to greatly ensure the load-bearing performance of the entire bridge. Furthermore, each drive motor 2 is a high-speed water-cooled flat wire motor, which is connected to the two-speed reduction gearbox 3 by bolts, and then the two form an integral structure. The drive motor 2 and the two-speed reduction gearbox 3 are integrally screwed to the electric drive axle housing 1 and are arranged on the outside of the electric drive axle housing 1 for easy after-sales maintenance. In addition, the power-distributed mining truck electric drive axle adopts dual high-speed motor drive, which can provide high-power drive.

[0034] In other embodiments, Figure 2 As shown, the power distributed mining truck electric drive axle also includes two speed sensors (not shown in the figure). Each speed sensor is respectively arranged on the reduction mechanism three-shaft 35 of a two-speed reduction box 3. When the two-speed reduction box 3 switches gears, the speed sensor can accurately monitor the gear reaching the corresponding speed, and the shift fork performs shaft-tooth engagement shifting, which simplifies the shifting process and eliminates the synchronizer, making the shifting process more accurate and efficient, reducing the probability of failure and product cost.

[0035] In the embodiments of this application, Figure 4 and Figure 5As shown, within each pair of drive motors 2 and two-speed reduction gearboxes 3, the motor output shaft 21, the second reduction gear shaft 34, and the third reduction gear shaft 35 are arranged parallel to each other. That is, the first gear reduction mechanism 31, the second gear reduction mechanism 32, and the third gear reduction mechanism 33 utilize parallel axis gears. The transmission gears of the two-speed reduction gearbox 3 utilize both parallel axis gears and a planetary gear system. The parallel axis gears connect to the high-speed drive motor 2, which is suitable for high-speed operation, can slow oil temperature rise, and improve transmission efficiency. Furthermore, the use of planetary gears after the parallel axis gears for reduction makes the overall reduction gearbox compact, with strong torque bearing capacity and good impact resistance.

[0036] In addition, if Figure 2 As shown, the two-speed reduction gearbox 3 in the embodiment of the present application uses an electronic differential, replacing the mechanical differential used in the prior art. This optimizes mechanical components, reduces the probability of failure, and reduces manufacturing costs. The power output on the left and right wheel ends is independent of each other, and a power output failure on one side will not affect the power output on the other side. Distributed drive technology enables independent drive characteristics for each wheel, not only easily achieving part-time and full-time four-wheel drive functions, but also improving the vehicle's maneuverability on harsh roads. Furthermore, the drive motor can use electronic differential technology to achieve different speeds for the left and right wheels when turning, or even reverse direction, achieving differential steering similar to that of tracked vehicles. This significantly reduces the vehicle's turning radius and allows for near-in-place steering in special circumstances. This has great application value for specialized vehicles such as mining trucks and engineering vehicles. Furthermore, the two-speed reduction gearbox 3 is connected to the wheel-end structure 4 of a single mining truck drive axle. The output power and torque of the drive motor 2 are directly transmitted to the wheel-end structure 4 of the single mining truck drive axle through the two-speed reduction gearbox 3. The reducer shaft gear only needs to bear half the torque and power output of the entire axle, effectively improving the fatigue life of the shaft gear.

[0037] In a specific embodiment, if Figure 4 and Figure 5 As shown, the first gear reduction mechanism 31 includes a first driving gear 311 and a first driven gear 312 that mesh with each other, wherein the first driving gear 311 is fixedly mounted on the motor output shaft 21, and the first driven gear 312 is fixedly mounted on the second reduction mechanism shaft 34, and the number of teeth of the first driving gear 311 is smaller than the number of teeth of the first driven gear 312. Furthermore, the first driving gear 311 and the first driven gear 312 are both cylindrical helical gears.

[0038] In another specific embodiment, Figure 4 and Figure 5As shown, the second gear reduction mechanism 32 includes a second driving gear 321 and a second driven gear 322 that mesh with each other, wherein the second driving gear 321 is fixedly mounted on the second reduction mechanism shaft 34, and the second driven gear 322 is fixedly mounted on the third reduction mechanism shaft 35, and the number of teeth on the second driving gear 321 is smaller than the number of teeth on the second driven gear 322. Furthermore, the second driving gear 321 and the second driven gear 322 are both cylindrical helical gears.

[0039] In another specific embodiment, Figure 4 and Figure 5 As shown, the third gear reduction mechanism 33 includes a third driving gear 331 and a third driven gear 332 that mesh with each other. The third driving gear 331 is fixedly mounted on the second reduction mechanism shaft 34, and the third driven gear 332 is fixedly mounted on the third reduction mechanism shaft 35. The number of teeth on the third driving gear 331 is smaller than that on the third driven gear 332. Furthermore, both the third driving gear 331 and the third driven gear 332 are cylindrical helical gears.

[0040] In the embodiment of the present application, the transmission system of the electric drive axle of the power-distributed mining truck adopts a three-axis two-speed structure, and additional motor output gears (i.e., first driving gear 311 and first driven gear 312) are provided. The motor output gear and the shift gears (i.e., second driving gear 321, second driven gear 322, third driving gear 331, and third driven gear 332) are designed separately to improve the gear service life. In addition, the transmission system simultaneously uses a cylindrical gear reduction mechanism (i.e., first gear reduction mechanism 31, second gear reduction mechanism 32, and third gear reduction mechanism 33) and a planetary reduction mechanism (i.e., first planetary reducer 37 and second planetary reducer 43). The high-speed drive motor 2 uses cylindrical gear reduction to reduce frictional heat caused by gear transmission. After the speed is reduced, the planetary reduction mechanism is used to facilitate high load bearing and improve torque density.

[0041] In addition, if Figure 4 and Figure 5 As shown, the primary planetary reducer 37 specifically includes a primary sun gear 371, primary planetary gears 372, and a primary planet carrier 373. The primary planetary gears 372 are supported on the primary planet carrier 373 and rotate around the primary sun gear 371. The secondary planetary reducer 43 specifically includes a secondary sun gear 431, secondary planetary gears 432, and a secondary planet carrier 433. The secondary planetary gears 432 are supported on the secondary planet carrier 433 and rotate around the secondary sun gear 431.

[0042] The embodiment of the present application further discloses a vehicle, including: a power-distributed mining truck electric drive axle. The power-distributed mining truck electric drive axle is the power-distributed mining truck electric drive axle provided in the above embodiment, and its structure and principle are the same as those in the above embodiment. For the sake of brief description, for matters not mentioned in the vehicle embodiment, reference may be made to the corresponding content in the above power-distributed mining truck electric drive axle embodiment.

[0043] In summary, the present application discloses a power-distributed electric drive axle for mining trucks and a vehicle. It adopts a dual-motor architecture, which reduces the power and torque required by each drive motor by half, and uses high-speed motors, which effectively reduces the size and cost of the motors, ensuring the chassis layout space of the entire axle and the manufacturing cost of the entire axle. The reduction gearbox adopts a two-speed reduction gearbox with a wide reduction ratio range and large output torque, while ensuring the maximum speed and maximum output torque of the entire axle, which can meet the maximum speed and climbing power requirements of large-tonnage pure electric mining trucks. In addition, the left and right wheel power of the power-distributed electric drive axle for mining trucks are independent of each other and do not affect each other, and the reduction gear shaft only needs to bear half of the torque output of the entire axle, which can effectively improve the fatigue life of the shaft gear. At the same time, the electric drive axle housing adopts an integral structure, which has a great improvement in assembly process compared to the split axle housing connected by bolts, and when the weight is the same, the axle housing has higher rigidity, which improves the load-bearing performance of the entire axle.

[0044] Those skilled in the art will understand that the drawings are merely schematic diagrams of one embodiment, and that the components shown in the drawings are not necessarily essential to the practice of the present invention. It should also be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it need not be further defined or explained in subsequent drawings.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In addition, in the description of the embodiments of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0046] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection described in the claims.

Claims

1. A power-distributed mining truck electric drive axle, characterized in that: include: An electric drive axle housing, two drive motors, two two-speed reduction gearboxes, and two mining truck drive axle wheel end structures. The housings of the two two-speed reduction gearboxes and the two drive motors are respectively fixedly arranged on the outer surface of the electric drive axle housing, and the two mining truck drive axle wheel end structures are respectively arranged at opposite ends of the electric drive axle housing. The two drive motors are respectively connected to one mining truck drive axle wheel end structure through one of the two-speed reduction gearboxes. Each of the two-speed reduction gearboxes comprises a first gear reduction mechanism, a second gear reduction mechanism, a third gear reduction mechanism, a second shaft of the reduction mechanism, a third shaft of the reduction mechanism, a shift mechanism, and a first-stage planetary reducer. The motor output shaft of the drive motor is connected to the second shaft of the reduction mechanism via the first gear reduction mechanism. The second shaft of the reduction mechanism is connected to the third shaft of the reduction mechanism via the second gear reduction mechanism or the third gear reduction mechanism. In the axial direction of the second shaft of the reduction mechanism, the second gear reduction mechanism is located between the first gear reduction mechanism and the third gear reduction mechanism, and the second gear reduction mechanism and the third gear reduction mechanism are connected via the shift mechanism. The shift mechanism is located on the third shaft of the reduction mechanism, and the third shaft of the reduction mechanism is connected to the sun gear shaft of the first-stage planetary reducer via the shift mechanism. Each of the mining truck drive axle wheel end structures includes a hub assembly, a drive axle half shaft, a secondary planetary reducer and a brake structure. The two ends of the drive axle half shaft are respectively connected to the planet carrier of the primary planetary reducer and the sun gear shaft of the secondary planetary reducer. The planet carrier of the secondary planetary reducer is connected to the hub assembly. The brake structure is fixedly arranged outside the electric drive axle housing, and there is a fixed gap between the hub assembly assembled corresponding to it.

2. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: In each pair of the driving motor and the two-speed reduction gearbox, the motor output shaft, the second shaft of the reduction mechanism, and the third shaft of the reduction mechanism are all arranged parallel to each other in pairs.

3. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: The first gear reduction mechanism includes a first driving gear and a first driven gear that mesh with each other. The first driving gear is fixedly arranged on the motor output shaft, and the first driven gear is fixedly arranged on the second shaft of the reduction mechanism. The number of teeth of the first driving gear is smaller than the number of teeth of the first driven gear.

4. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: The second gear reduction mechanism includes a second driving gear and a second driven gear that mesh with each other. The second driving gear is fixedly arranged on the second shaft of the reduction mechanism, and the second driven gear is fixedly arranged on the third shaft of the reduction mechanism. The number of teeth of the second driving gear is less than the number of teeth of the second driven gear.

5. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: The third gear reduction mechanism includes a third driving gear and a third driven gear that are meshed with each other. The third driving gear is fixedly arranged on the second shaft of the reduction mechanism, and the third driven gear is fixedly arranged on the third shaft of the reduction mechanism. The number of teeth of the third driving gear is less than the number of teeth of the third driven gear.

6. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: Also includes: Two speed sensors, each of which is respectively arranged on the three axes of the reduction mechanism of one of the two-speed reduction gearboxes.

7. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: The two drive motors and the two two-speed reduction gearboxes are arranged in a mirror-symmetrical manner.

8. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: The electric drive axle housing is an integral cast axle housing.

9. The power-distributed mining truck electric drive axle according to claim 1, characterized in that: Each of the driving motors is a high-speed water-cooled flat wire motor.

10. A vehicle, characterized in that: include: The power-distributed mining truck electric drive axle according to any one of claims 1 to 9.

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