Drive axle and mining dump truck

Abstract

The utility model discloses an embodiment provides a kind of drive axle and mining dump truck, the drive axle includes: axle housing, including first axle housing and two second axle housing respectively installed in the both ends of the first axle housing;Motor is provided with two, two the motor and two The second axle housing one-to-one correspondence, at least part of each the motor is located in the second axle housing corresponding, and located in the second axle housing corresponding The end close to the first axle housing, the motor includes output end;And wheel edge reduction gear, provided with two, two The wheel edge reduction gear and two The second axle housing one-to-one correspondence, each The wheel edge reduction gear is located in the second axle housing corresponding The end away from the first axle housing, each The wheel edge reduction gear is connected with the output end of the motor in the second axle housing corresponding.The utility model embodiment is convenient for the installation and fixation of motor, and is convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a drive axle and a mining dump truck. Background Technology

[0002] As a core piece of equipment for open-pit mine transportation, the integrated design of the wheel-side reducer and traction motor of mining dump trucks directly determines the vehicle's driving force, structural compactness, and maintenance efficiency. However, in existing technologies, the traction motor is usually integrated with the wheel-side reducer to form an electric wheel assembly, but the wheel-side reducer of small mining dump trucks is small in size, and the internal space is insufficient to accommodate the traction motor, resulting in difficulties in motor installation. Utility Model Content

[0003] In order to improve at least some of the shortcomings or deficiencies in the prior art, embodiments of the present invention provide a drive axle and a mining dump truck, which facilitate the installation and fixing of the motor and make disassembly convenient.

[0004] On one hand, an embodiment of the present invention provides a drive axle, comprising: an axle housing, including a first axle housing and two second axle housings respectively installed at both ends of the first axle housing; two motors, each corresponding to one of the two second axle housings, with at least a portion of each motor located within the corresponding second axle housing and at the end of the corresponding second axle housing closer to the first axle housing, each motor including an output terminal; and two wheel-side reducers, each corresponding to one of the two second axle housings, each wheel-side reducer located at the end of the corresponding second axle housing furthest from the first axle housing, each wheel-side reducer connected to the output terminal of the motor within the corresponding second axle housing.

[0005] In some embodiments, the second bridge housing is integrally disposed with the motor.

[0006] In some embodiments, a first receiving cavity is provided in the first bridge housing, and a second receiving cavity is provided in the second bridge housing; a portion of the motor is installed in the second receiving cavity, and another portion of the motor is installed in the first receiving cavity.

[0007] In some embodiments, the first bridge housing is provided with a first flange at both ends, the second bridge housing is provided with a second flange at one end near the first bridge housing, and the outer wall of the motor is provided with a third flange. The first bridge housing, the second bridge housing and the motor are fixedly connected by the first flange, the second flange and the third flange, and the third flange is located between the first flange and the second flange.

[0008] In some embodiments, steps are provided at the opposite ends of the first flange and the second flange to form a positioning stop; a connector is also provided between the third flange and the motor; in the axial direction of the drive axle, the thickness of the connector is greater than the thickness of the third flange, and the connector abuts against the positioning stop.

[0009] In some embodiments, the inner wall of the first bridge housing is provided with a boss, which abuts against the outer wall of the motor.

[0010] In some embodiments, the first bridge housing is provided with a first air inlet communicating with the first accommodating cavity. The drive bridge also includes an A-frame and a fan. The A-frame is provided with a second air inlet, a bridge housing connection air outlet, and an air duct communicating between the second air inlet and the bridge housing connection air outlet. The air outlet of the fan is connected to the second air inlet of the A-frame, and the bridge housing connection air outlet of the A-frame is connected to the first air inlet of the first bridge housing.

[0011] In some embodiments, a rear suspension cylinder is further included, wherein two rear suspension cylinders are provided, and the two rear suspension cylinders are hinged to the outer walls of the two second axle housings in a one-to-one correspondence.

[0012] In some embodiments, a stabilizer bar is also included, one end of which is hinged to the outer wall of the first axle housing.

[0013] Another embodiment of this utility model provides a mining dump truck, including: a frame; the aforementioned drive axle, wherein the drive axle is connected to the frame.

[0014] As can be seen from the above, the above-mentioned technical features of this utility model can have one or more of the following beneficial effects: the bridge housing is set as a first bridge housing and two second bridge housings, which facilitates the disassembly and assembly of the bridge housing; at least part of the motor is installed in the second bridge housing, which effectively utilizes the internal space of the bridge housing, optimizes space utilization, facilitates the installation and fixing of the motor, and facilitates disassembly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a drive bridge provided in an embodiment of the present utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of a portion of a drive axle provided in an embodiment of the present utility model.

[0018] Figure 3 for Figure 2 The diagram shows an exploded view of a drive axle.

[0019] Figure 4 for Figure 2 The diagram shows another exploded structure of a drive axle.

[0020] Figure 5 This is a structural schematic diagram of another state of a drive axle provided in an embodiment of the present invention.

[0021] Figure 6 for Figure 5 A sectional view of a portion of the structure shown.

[0022] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point A in the diagram.

[0023] Figure 8 This is a structural schematic diagram of a mining dump truck provided for an embodiment of the present utility model.

[0024] Figure label:

[0025] 1. Drive axle; 10. Axle housing; 110. First axle housing; 111. First accommodating cavity; 112. First flange; 113. Boss; 114. First air inlet; 120. Second axle housing; 121. Second accommodating cavity; 122. Second flange; 20. Motor; 210. Output end; 220. Third flange; 230. Connecting component; 30. Wheel-side reducer; 40. Positioning stop; 50. A-frame; 510. Second air inlet; 520. Axle housing connecting air outlet; 540. First connecting arm; 550. Second connecting arm; 560. Third connecting arm; 570. Fourth connecting arm; 60. Fan; 70. Rear suspension cylinder; 80. Stabilizer bar;

[0026] 2. Frame. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] See Figure 8This utility model provides a mining dump truck, including a drive axle 1 and a frame 2, as well as other components such as a front axle, a cargo box, and wheels. The drive axle 1 is connected to the frame 2. The frame 2, as the core load-bearing structure of the mining dump truck, adopts a high-strength metal frame design, providing an integrated mounting base for key subsystems such as the engine assembly, power battery pack, cab module, and cargo box. The drive axle 1 is installed, for example, in the rear region of the frame 2, forming a rigid coupling with the rear end of the frame 2, and adopts an electric drive rear axle architecture to achieve drive.

[0029] Specifically, such as Figure 2 , Figure 3 and Figure 4 As shown, the drive axle 1 includes an axle housing 10, a motor 20, and wheel-side reducers 30. The axle housing 10 includes a first axle housing 110 and two second axle housings 120 respectively mounted at both ends of the first axle housing 110. The first and second axle housings 110 and 120 are, for example, tubular parts. Two motors 20 are provided, each corresponding to one of the two second axle housings 120. At least a portion of each motor 20 is located within its corresponding second axle housing 120 and at the end of the corresponding second axle housing 120 closest to the first axle housing 110. Each motor 20 includes an output terminal 210. Two wheel-side reducers 30 are provided, each corresponding to one of the two second axle housings 120. Each wheel-side reducer 30 is located at the end of its corresponding second axle housing 120 furthest from the first axle housing 110. Each wheel-side reducer 30 is connected to the output terminal 210 of the motor 20 within its corresponding second axle housing 120.

[0030] The bridge housing 10 is configured as a first bridge housing 110 and two second bridge housings 120, which facilitates the disassembly and assembly of the bridge housing 10. At least a portion of the motor 20 is installed in the second bridge housing 120, which effectively utilizes the internal space of the bridge housing 10, optimizes space utilization, facilitates the installation and fixation of the motor 20, and makes disassembly and assembly convenient. Furthermore, the segmented bridge housing 10 allows for the independent disassembly of the first bridge housing 110 or the second bridge housing 120, enabling maintenance of the motor 20 without the need for complete disassembly. It also provides better protection for the motor 20 and reduces the impact of the external environment on the motor 20.

[0031] The wheel-side reducer 30 is connected to the second axle housing 120, for example, via a flange, so that the wheel-side reducer 30 can be fixed on the axle housing 10.

[0032] In this design, the output end 210 of the motor 20 is provided with a connecting shaft, and the end of the wheel-side reducer 30 closest to the motor 20 (i.e., the input end of the wheel-side reducer) is provided with a connecting hole. The connecting shaft is installed in the connecting hole to connect the output end of the motor 20 with the wheel-side reducer 30, thereby realizing power transmission between the motor 20 and the wheel-side reducer 30. The transmission chain between the wheel-side reducer 30 and the motor 20 is shorter and more efficient. The housing of the wheel-side reducer 30 is a wheel hub, which drives the wheel to rotate. Furthermore, the connecting shaft is, for example, an external spline shaft, and the connecting hole is, for example, an internal spline hole.

[0033] The wheel-side reducer 30 is a speed reduction device used to connect the axle housing 10 and mount the wheel. The wheel-side reducer 30 is the core hub for vehicle power transmission, converting the high-speed, low-torque power output from the motor 20 into the low-speed, high-torque power required by the wheel, thus adapting to the speed-torque matching requirements between the power source and the wheel. The motor 20 may be, for example, a variable-frequency hydromagnetic AC motor; this invention is not limited to this.

[0034] like Figure 3 As shown, in some embodiments, the second bridge housing 120 is integrally formed with the motor 20, that is, the second bridge housing 120 is a component of the stator of the motor 20, and the stator winding of the motor 20 is directly embedded in the internal cavity of the second bridge housing 120, eliminating the need for a separate motor housing, making the structure of the motor 20 and the second bridge housing 120 more compact, and reducing the radial dimension of the bridge housing 10.

[0035] like Figure 4 , Figure 6 and Figure 7 As shown, in some embodiments, a first receiving cavity 111 is provided in the first bridge housing 110, and a second receiving cavity 121 is provided in the second bridge housing 120. A part of the motor 20 is installed in the second receiving cavity 121, and another part of the motor 20 is installed in the first receiving cavity 111, which can provide a certain degree of protection for the motor 20 and reduce the erosion and damage to the motor 20 by external dust, mud, debris, etc.

[0036] like Figure 4As shown, in some embodiments, the first bridge housing 110 has first flanges 112 at both ends, the second bridge housing 120 has a second flange 122 at the end near the first bridge housing 110, and the outer wall of the motor 20 has a third flange 220. The first bridge housing 110, the second bridge housing 120, and the motor 20 are fixedly connected by the first flanges 112, 122, and 220, with the third flange 220 located between the first flanges 112 and 122. The first flanges 112, 122, and 220 are bolted together to form an integral load-bearing structure, ensuring the bending and torsional resistance of the bridge housing 10 under heavy load and bumpy conditions. The first bridge housing 110, the second bridge housing 120, and the motor 20 can be manufactured and assembled independently, facilitating production and maintenance.

[0037] like Figure 6 and Figure 7 As shown, in some embodiments, steps are provided at the opposite ends of the first flange 112 and the second flange 122 to form a positioning stop 40, and a connector 230 is also provided between the third flange 220 and the motor 20. In the axial direction of the drive axle 1, the thickness of the connector 230 is greater than the thickness of the third flange 220, and the connector 230 abuts against the positioning stop 40. The positioning stop 40 and the connector 230 allow for quick alignment of the first axle housing 110, the second axle housing 120, and the motor 20 during assembly, reducing adjustment time, improving assembly efficiency and accuracy, and facilitating fixing by bolts passing through the first flange 112, the third flange 220, and the second flange 122.

[0038] like Figure 7 As shown, in some embodiments, the inner wall of the first axle housing 110 is provided with a boss 113, which abuts against the outer wall of the motor 20 to constrain the motor 20 and prevent the motor 20 from swinging radially along the axle housing 10 under heavy load and bumpy conditions. Furthermore, the connector 230 abuts against the positioning stop 40, and the boss 113 abuts against the outer wall of the motor 20, achieving bidirectional positioning of the motor 20 and reducing vibration and displacement. Specifically, for example, two bosses 113 are provided, with each boss 113 corresponding to one of the two motors 20, and each boss 113 abutting against the outer wall of the corresponding motor 20.

[0039] like Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, the first bridge housing 110 has a first air inlet 114 communicating with the first accommodating cavity 111. The drive bridge 1 also includes an A-frame 50 and a fan 60. The A-frame 50 is provided with a second air inlet 510, a bridge housing connecting air outlet 520, and an air duct connecting the second air inlet 510 and the bridge housing connecting air outlet 520. The air outlet of the fan 60 is connected to the second air inlet 510 of the A-frame 50, and the bridge housing connecting air outlet 520 of the A-frame 50 is connected to the first air inlet 114 of the first bridge housing 110. The air outlet of the fan 60 and the second air inlet 510 are connected, for example, by a flange, and the bridge housing connecting air outlet 520 of the A-frame 50 and the first air inlet 114 of the first bridge housing 110 are connected, for example, by a flange. The airflow generated by the fan 60 flows into the air duct through the second air inlet 510 of the A-frame 50, and enters the first air inlet 114 of the first bridge housing 110 through the air outlet 520 connected to the bridge housing. The airflow can flow to the motor 20 within the bridge housing 10 to achieve heat dissipation and ensure heat dissipation efficiency. The bridge housing 10 also has a heat dissipation outlet communicating with the first accommodating cavity 111, forming convection to expel the hot air passing through the motor 20, forming a heat dissipation path and preventing heat accumulation. Furthermore, a filter screen is embedded in the heat dissipation outlet to prevent flying stones or other foreign objects from entering the bridge housing 10 and damaging the components.

[0040] In this design, the boss 113 on the inner wall of the first bridge housing 110 abuts against the outer wall of the motor 20. The first air inlet 114 is located between the boss 113 and the output end 210 of the motor 20. The first accommodating cavity 111 includes, for example, a first sub-accommodating cavity located between two bosses 113. The heat dissipation outlet is located, for example, between two bosses 113 and communicates with the first sub-accommodating cavity. The airflow generated by the fan 60 enters the first bridge housing 110 through the first air inlet 114. Because the boss 113 abuts against the inner wall of the first bridge housing 110, the blown airflow can only flow towards the output end 210 of the motor 20, flows into the internal gap of the rotor of the motor 20, then enters the first sub-accommodating cavity, and flows out through the heat dissipation outlet. This allows the airflow generated by the fan 60 to pass through the interior of the motor 20, ensuring sufficient contact between the airflow and the motor 20 for heat exchange and guaranteeing effective heat dissipation.

[0041] For example, there are two first air inlets 114 and two second air inlets 510. The two first air inlets 114 correspond to the two motors 20, and both motors 20 can achieve effective heat dissipation.

[0042] Furthermore, multiple connectors 230 are provided, arranged at intervals around the outer wall of the motor 20, with air passages formed between any two adjacent connectors 230. The first accommodating cavity 111 and the second accommodating cavity 121 are connected through the air passages. The airflow generated by the fan 60 flows into the bridge housing 10 through the second air inlet 510, the air duct, the bridge housing connecting air inlet 520, and the first air inlet 114, and then enters the rotor gap of the motor 20 through the air passages to complete heat exchange before flowing out from the heat dissipation outlet, forming a complete heat dissipation path and ensuring heat dissipation effect.

[0043] Furthermore, the A-frame 50 includes a first connecting arm 540, a second connecting arm 550, a third connecting arm 560, and a fourth connecting arm 570. One end of each of the first connecting arm 540, the second connecting arm 550, and the third connecting arm 560 is connected to form a single unit. The first connecting arm 540, the second connecting arm 550, and the fourth connecting arm 570 are all hollow structures. The two ends of the fourth connecting arm 570 are respectively connected to the first connecting arm 540 and the second connecting arm 550. The first connecting arm 540, the second connecting arm 550, and the fourth connecting arm 570 form a triangular structure, which improves stability and reduces torsional deformation. The second air inlet 510 is located on the fourth connecting arm 570, and the fan 60 is mounted on the fourth connecting arm 570. The ends of the first connecting arm 540 and the second connecting arm 550 furthest from the third connecting arm 560 are both provided with axle housing connection air inlets 520. The first connecting arm 540 and the second connecting arm 550 are connected to the first axle housing 110. The airflow generated by the fan 60 flows through the fourth connecting arm 570 to the first connecting arm 540 and the second connecting arm 550 respectively, ensuring uniform airflow to the first connecting arm 540 and the second connecting arm 550. The airflow through the two axle housing connection air inlets 520 is also uniform, ensuring effective heat dissipation. The end of the third connecting arm 560 furthest from the first connecting arm 540 is connected to the frame 2. The A-frame 50 can transmit the driving force and load of the drive axle 1 to the frame 2, ensuring stable power transmission.

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the drive axle 1 further includes rear suspension cylinders 70. Two rear suspension cylinders 70 are provided, each hinged to the outer wall of one of the two second axle housings 120. The ends of the two rear suspension cylinders 70 furthest from the second axle housing 120 are hinged to the frame 2. The rear suspension cylinders 70 provide elasticity to the drive axle 1, mitigating the vibration of the dump truck, bearing the load generated by the weight of the dump truck, the weight of the cargo, and road impacts, and transmitting the load to the frame 2, enabling the dump truck to travel stably. The rear suspension cylinders 70 are, for example, hydraulic cylinders.

[0045] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the drive axle 1 further includes a stabilizer bar 80, one end of which is hinged to the outer wall of the first axle housing 110, and the end of the stabilizer bar 80 away from the first axle housing 110 is hinged to the frame 2. The stabilizer bar 80 maintains the stability and balance of the dump truck during operation.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] Furthermore, it is understood that the foregoing embodiments are merely illustrative examples of this utility model. Provided that the technical features do not conflict, the structure is not contradictory, and the purpose of this utility model is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drive axle (1), characterized in that, include: The bridge housing (10) includes a first bridge housing (110) and two second bridge housings (120) respectively installed at both ends of the first bridge housing (110). Two motors (20) are provided, and the two motors (20) correspond one-to-one with the two second bridge housings (120). At least a portion of each motor (20) is located inside the corresponding second bridge housing (120) and at the end of the corresponding second bridge housing (120) near the first bridge housing (110). The motor (20) includes an output terminal (210). as well as There are two wheel-side reducers (30), and each wheel-side reducer (30) corresponds to one of the two second axle housings (120). Each wheel-side reducer (30) is located at the end of the corresponding second axle housing (120) away from the first axle housing (110). Each wheel-side reducer (30) is connected to the output end (210) of the motor (20) inside the corresponding second axle housing (120).

2. The drive axle (1) as described in claim 1, characterized in that, The second bridge housing (120) is integrally formed with the motor (20).

3. The drive axle (1) as described in claim 1, characterized in that, The first bridge housing (110) is provided with a first receiving cavity (111), and the second bridge housing (120) is provided with a second receiving cavity (121); a part of the motor (20) is installed in the second receiving cavity (121), and the other part of the motor (20) is installed in the first receiving cavity (111).

4. The drive axle (1) as described in claim 3, characterized in that, The first bridge housing (110) is provided with a first flange (112) at both ends, the second bridge housing (120) is provided with a second flange (122) at the end near the first bridge housing (110), and the outer wall of the motor (20) is provided with a third flange (220). The first bridge housing (110), the second bridge housing (120) and the motor (20) are fixedly connected by the first flange (112), the second flange (122) and the third flange (220), and the third flange (220) is located between the first flange (112) and the second flange (122).

5. The drive axle (1) as described in claim 4, characterized in that, The first flange (112) and the second flange (122) are each provided with a step at their opposite ends to form a positioning stop (40); a connector (230) is also provided between the third flange (220) and the motor (20); in the axial direction of the drive axle (1), the thickness of the connector (230) is greater than the thickness of the third flange (220), and the connector (230) abuts against the positioning stop (40).

6. The drive axle (1) as described in claim 3, characterized in that, The inner wall of the first bridge housing (110) is provided with a boss (113), which abuts against the outer wall of the motor (20).

7. The drive axle (1) as described in claim 3, characterized in that, The first bridge housing (110) is provided with a first air inlet (114) communicating with the first accommodating cavity (111). The drive bridge (1) also includes an A-frame (50) and a fan (60). The A-frame (50) is provided with a second air inlet (510), a bridge housing connecting air outlet (520), and an air duct communicating between the second air inlet (510) and the bridge housing connecting air outlet (520). The air outlet of the fan (60) is communicating with the second air inlet (510) of the A-frame (50), and the bridge housing connecting air outlet (520) of the A-frame (50) is communicating with the first air inlet (114) of the first bridge housing (110).

8. The drive axle (1) as described in claim 1, characterized in that, It also includes a rear suspension cylinder (70), of which two are provided, and the two rear suspension cylinders (70) are hinged one-to-one to the outer wall of the two second axle housings (120).

9. The drive axle (1) as described in claim 1, characterized in that, It also includes a balance bar (80), one end of which is hinged to the outer wall of the first bridge housing (110).

10. A mining dump truck, characterized in that, include: Frame (2); The drive axle (1) as described in any one of claims 1-9 is connected to the vehicle frame (2).

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