Mining dump truck

Abstract

The embodiment of the invention relates to a mining dump truck. The mining dump truck comprises a frame; the middle axle assembly is arranged on the lower side of the frame; the rear axle assembly is arranged on the lower side of the frame, and the rear axle assembly and the middle axle assembly are arranged at intervals; the electric driving controller is arranged on the frame and located between the middle axle assembly and the rear axle assembly; the middle axle assembly comprises a middle axle housing and middle axle electric wheels, the middle axle housing is arranged in the middle of the frame, and the two middle axle electric wheels are installed at the two ends of the middle axle housing respectively; the rear axle assembly comprises a rear axle housing and rear axle electric wheels, the rear axle housing is arranged at the rear end of the frame, and the two rear axle electric wheels are installed at the two ends of the rear axle housing respectively; the electric drive controller is arranged between the middle axle housing and the rear axle housing and electrically connected with the two middle axle electric wheels and the two rear axle electric wheels. According to the embodiment, the electric driving controller is arranged between the middle axle housing and the rear axle housing, so that the length of a cable on the frame can be reduced, and the space is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining machinery, in particular to a mining dump truck. Background Art

[0002] Mining dump trucks are generally divided into electric drive mining dump trucks, mechanical drive dump trucks and hydraulic drive dump trucks, etc.

[0003] The existing electric drive mining dump truck includes a body part, a frame part, a drive axle and an electric drive controller. The body part generally includes a driver's cab and a platform part on which the driver's cab is placed. The electric drive controller is generally arranged on the platform and is located on the right side of the driver's cab. The traction motor is arranged on the drive axle, and the traction motor needs to be connected to the electric drive controller through a cable for control, resulting in a long connection length of the cable from the electric drive controller to the traction motor. In addition, due to the different number of traction motors, the connection cables from the electric drive controller to each traction motor are arranged in a relatively messy manner, which makes the cost of using cables high. Summary of the Invention

[0004] Therefore, in order to overcome at least some of the defects and shortcomings of the above-mentioned prior art, an embodiment of the present invention provides a mining dump truck.

[0005] On the one hand, an embodiment of the present invention provides a mining dump truck, comprising: a vehicle frame; a mid-bridge assembly, arranged on the lower side of the vehicle frame; a rear axle assembly, arranged on the lower side of the vehicle frame and spaced apart from the mid-bridge assembly; an electric drive controller, arranged on the vehicle frame and located between the mid-bridge assembly and the rear axle assembly; the mid-bridge assembly comprises a mid-bridge axle housing and a mid-bridge electric wheel, the mid-bridge axle housing being arranged in the middle of the vehicle frame, and the two mid-bridge electric wheels being respectively mounted on the two ends of the mid-bridge axle housing; the rear axle assembly comprises a rear axle housing and a rear axle electric wheel, the rear axle housing being arranged at the rear end of the vehicle frame, and the two rear axle electric wheels being respectively mounted on the two ends of the rear axle housing; the electric drive controller being arranged between the mid-bridge axle housing and the rear axle housing, and being electrically connected to the two mid-bridge electric wheels and the two rear axle electric wheels, respectively.

[0006] In one embodiment of the present invention, the mining dump truck further includes: a cooling assembly, which is arranged on the vehicle frame and electrically connected to the electric drive controller, and the cooling assembly is used to cool the mid-axle electric wheel, the rear-axle electric wheel and the electric drive controller.

[0007] In one embodiment of the present invention, the cooling assembly includes an electric drive controller cooling fan, which is arranged on a side of the rear axle housing away from the middle axle housing and fixed to the vehicle frame; the electric drive controller cooling fan is connected to the electric drive controller through a first pipe, and the electric drive controller cooling fan is used to blow the generated wind from the first pipe to the electric drive controller and cool the electric drive controller.

[0008] In one embodiment of the present invention, the cooling assembly further includes a mid-bridge cooling fan, and the mid-bridge assembly further includes a mid-bridge A-type frame, one end of the mid-bridge A-type frame is connected to the mid-bridge axle housing, and the other end of the mid-bridge A-type frame is connected to the vehicle frame, and the mid-bridge cooling fan is located on the mid-bridge A-type frame and connected to the mid-bridge A-type frame.

[0009] In one embodiment of the present invention, a vent is provided on one side of the middle bridge A-type frame close to the middle bridge cooling fan, and the air outlet of the middle bridge cooling fan corresponds to the vent; an air outlet is provided on one end of the middle bridge A-type frame close to the middle bridge bridge housing, and the vent is communicated with the air outlet; the middle bridge bridge housing has a first inner cavity, and a cooling air inlet and a cooling air outlet respectively communicated with the first inner cavity, the cooling air inlet corresponds to and is communicated with the air outlet, and the cooling air outlet is provided corresponding to the middle bridge electric wheel, the air outlet, the cooling air inlet, the first inner cavity and the cooling air outlet are communicated in sequence to form a middle bridge cooling air duct, and the middle bridge cooling fan cools the middle bridge electric wheel through the middle bridge cooling air duct.

[0010] In one embodiment of the present invention, the mid-bridge electric wheel includes a mid-bridge traction motor and a mid-bridge reducer, the mid-bridge traction motor is located in the first inner cavity, and the mid-bridge reducer is connected to the mid-bridge traction motor; the mid-bridge cooling fan cools the mid-bridge traction motor through the mid-bridge cooling air duct.

[0011] In one embodiment of the present invention, the middle bridge housing includes a middle section and two end sections located at opposite ends of the middle section; the cooling air inlet is located on the middle section; the middle bridge traction motor includes a motor body and a connecting flange, the connecting flange is arranged around the motor body, and the connecting flange is clamped between the end section and the middle section; the opposite ends of the motor body are respectively located in the end section and the middle section; a cooling through hole may be formed between the connecting flange and the motor body; the cooling air inlet is connected to the cooling air outlet through the cooling through hole and the internal gap of the rotor of the motor body.

[0012] In one embodiment of the present invention, the mid-bridge assembly further includes a mid-bridge temperature sensor and a mid-bridge controller. The mid-bridge temperature sensor is disposed in the mid-bridge traction motor. The mid-bridge temperature sensor is electrically connected to the mid-bridge controller. The mid-bridge controller is electrically connected to the mid-bridge cooling fan. The mid-bridge controller is used to control the rotational speed of the mid-bridge cooling fan according to the temperature data sent by the mid-bridge temperature sensor.

[0013] In one embodiment of the present invention, the cooling assembly also includes a rear axle cooling fan, which is arranged on a side of the middle axle housing away from the rear axle housing and fixed on the vehicle frame. The rear axle cooling fan is connected to the rear axle housing through a second pipe.

[0014] In one embodiment of the present invention, the rear axle electric wheel includes a rear axle traction motor and a rear axle reducer, the rear axle bridge housing has a second inner cavity, the rear axle traction motor is located in the second inner cavity, and the rear axle reducer is connected to the rear axle traction motor; the vehicle frame also includes a rear axle A-type frame, one end of the rear axle A-type frame is connected to the rear axle bridge housing, and the other end of the rear axle A-type frame is connected to the middle bridge assembly, a rear axle air inlet is provided on the side wall of the rear axle A-type frame, the air outlet of the second duct corresponds to and is connected to the rear axle air inlet, and a rear axle air outlet is provided at one end of the rear axle A-type frame close to the rear axle bridge housing, and the rear axle air outlet is respectively connected to the rear axle air inlet and the second inner cavity, the second duct, the rear axle air inlet, and the rear axle air outlet are connected to the second inner cavity and form a rear axle cooling air duct, and the rear axle cooling fan cools the rear axle traction motor through the rear axle cooling air duct.

[0015] From the above, it can be seen that the above technical features of the present invention can have the following beneficial effects: in this application, the middle axle electric wheels are arranged on both ends of the middle axle bridge housing, and the rear axle electric wheels are arranged on both ends of the rear axle bridge housing; the electric drive controller is arranged between the middle axle bridge housing and the rear axle bridge housing, and is electrically connected to the middle axle electric wheel and the rear axle electric wheel respectively, that is, the electric drive controller is arranged between the middle axle bridge housing and the rear axle bridge housing, so that the distance between the electric drive controller and the two middle axle electric wheels on both ends of the middle axle bridge housing and the two rear axle electric wheels at both ends of the rear axle bridge housing are relatively close, thereby reducing the length of the connecting cable of the electric drive controller, thereby optimizing the installation position of the electric drive controller and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0017] Figure 1 This is an overall structural diagram of a mining dump truck provided by an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A partial structural diagram of the frame shown.

[0019] Figure 3 for Figure 2 Another perspective view shown.

[0020] Figure 4 for Figure 2 A perspective view of the partial structure shown.

[0021] Figure 5 for Figure 4 Another perspective view shown.

[0022] Figure 6 for Figure 4 Exploded view of the mid-axle assembly shown.

[0023] Figure 7 for Figure 6 Exploded view of the A-frame shown.

[0024] Figure 8 for Figure 4 A partial cross-sectional view of the mid-bridge assembly is shown.

[0025] Figure 9 for Figure 8 An enlarged view of point A is shown.

[0026] Figure 10 for Figure 4 A partially exploded view of the rear axle assembly is shown.

[0027] Figure 11 for Figure 10 The partial cross-sectional view shown.

[0028] Figure 12 for Figure 4 The structural diagram of the rear axle A-frame is shown.

[0029] Figure 13 for Figure 12 Another perspective view shown.

[0030]

Description of the accompanying drawings

[0031] 1: Mining dump truck; 10: Driver's cab; 20: Vehicle frame; 30: Electric drive controller; 40: Middle axle assembly; 41: Middle axle housing; 42: Middle axle electric wheel; 44: Middle axle A-frame; 50: Rear axle assembly; 51: Rear axle housing; 52: Rear axle electric wheel; 53: Rear axle A-frame; 60: Cooling assembly; 61: Electric drive controller cooling fan; 62: Rear axle cooling fan; 63: Middle axle cooling fan; 71: First duct; 72: Second duct; 73: Middle axle cooling air duct; 80: Carriage; 411: First inner cavity; 412: Cooling air inlet; 413: Cooling Cooling air outlet; 414: protrusion; 415: middle section; 416: end section; 421: mid-axle traction motor; 422: mid-axle reducer; 441: vent; 442: air outlet; 511: second inner cavity; 512: rear axle cooling air inlet; 513: rear axle cooling air outlet; 521: rear axle traction motor; 522: rear axle reducer; 531: rear axle air inlet; 532: rear axle air outlet; 4211: motor body; 4212: connecting flange; 4213: cooling hole; 42111; stator; 42112: rotor; 42113: cooling hole. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] It should also be noted that the division of multiple embodiments in the present invention is only for the convenience of description and should not constitute a special limitation. The features in various embodiments can be combined and referenced to each other without contradiction.

[0035] like Figures 1-10As shown, an embodiment of the present invention provides a mining dump truck 1 , which includes: a vehicle frame 20 , an electric drive controller 30 , a middle axle assembly 40 and a rear axle assembly 50 .

[0036] The mid-bridge assembly 40 is mounted on the lower side of the vehicle frame 20 ; the rear-bridge assembly 50 is mounted on the lower side of the vehicle frame 20 and is spaced apart from the mid-bridge assembly 40 ; the electric drive controller 30 is disposed on the vehicle frame 20 and is located between the mid-bridge assembly 40 and the rear-bridge assembly 50 .

[0037] In this embodiment, if Figure 1 As shown, the mining dump truck 1 may further include, for example, a driver's cab 10 and a carriage 80. The driver's cab 10 may be disposed at the front end of the vehicle frame 20, and the carriage 80 may be disposed at the upper end of the vehicle frame 20. The driver's cab 10 may be, for example, a driver's cab of a mining dump truck in the prior art, and specific reference may be made to the front end of a conventional mining dump truck. The vehicle frame 20 and the carriage 80 may be understood in the same manner as the frame and carriage of a conventional mining dump truck.

[0038] Among them, Figure 2-Figure 5As shown, the mid-bridge assembly 40 may, for example, include a mid-bridge housing 41 and a mid-bridge electric wheel 42. The mid-bridge housing 41 is arranged in the middle of the frame 20, and the two mid-bridge electric wheels 42 are respectively on the two ends of the mid-bridge housing 41. The mid-bridge electric wheel 42 may, for example, be connected to the frame 20 through a first suspension cylinder 91. The first suspension cylinder 91 is used to achieve shock absorption and buffering effects on the mining dump truck 1. The first suspension cylinder 91 may, for example, be a suspension cylinder of a mining dump truck in the prior art. The rear axle assembly 50 includes a rear axle housing 51 and rear axle electric wheels 52. The rear axle housing 51 is disposed at the rear end of the vehicle frame 20. The two rear axle electric wheels 52 are mounted on either end of the rear axle housing 51. The rear axle electric wheels 52 may be connected to the vehicle frame 20, for example, via a second suspension cylinder 92. The second suspension cylinder 92 is used to provide shock absorption and cushioning for the mining dump truck 1. The second suspension cylinder 92 may be, for example, a suspension cylinder used in mining dump trucks in the prior art. The electric drive controller 30 is disposed between the middle axle housing 41 and the rear axle housing 51 and is electrically connected to the two middle axle electric wheels 42 and the two rear axle electric wheels 52, respectively. In this embodiment, the middle axle assembly 40 and the rear axle assembly 50 may be, for example, the two drive axle components of a conventional mining dump truck. The names middle axle assembly and rear axle assembly are used for convenience of distinction. The electric drive controller 30 may include, for example, a rectifier, an inverter, an inductor, and the like. The middle axle housing 41 may be, for example, the rear axle housing part located in the middle of the frame 20, and the rear axle housing 51 may be, for example, the rear axle housing part located at the rear of the frame. The middle axle electric wheel 42 and the rear axle electric wheel 52 may, for example, include a traction motor + a wheel-side reducer. The traction motor is connected to the wheel-side reducer. A rim may be installed on the outer side of the wheel-side reducer, and a tire is installed on the rim. The rim may be connected to the reducer so that the traction motor drives the rim of the middle axle to rotate, thereby driving the tire to rotate.

[0039] In this application, the middle axle electric wheels 42 are arranged on both ends of the middle axle bridge housing 41, and the rear axle electric wheels 52 are arranged on both ends of the rear axle bridge housing 51; the electric drive controller 30 is arranged between the middle axle bridge housing 41 and the rear axle bridge housing 51, and is electrically connected to the middle axle electric wheels 42 and the rear axle electric wheels 52 respectively, that is, the electric drive controller 30 is arranged between the middle axle bridge housing 41 and the rear axle bridge housing 51, so that the distance between the electric drive controller 30 and the two middle axle electric wheels 42 on both ends of the middle axle bridge housing 41 and the two rear axle electric wheels 52 on both ends of the rear axle bridge housing 51 are relatively close, thereby reducing the length of the connecting cable of the electric drive controller 30, thereby optimizing the installation position of the electric drive controller 30 and saving the cost of laying the cable length.

[0040] Furthermore, if Figure 3As shown, the mining dump truck 1 further includes, for example, a cooling assembly 60, which is disposed on the vehicle frame 20 and electrically connected to the electric drive controller 30. The cooling assembly 60 is used to cool the mid-axle electric wheels 42, the rear-axle electric wheels 52, and the electric drive controller 30. The cooling assembly 60 can be, for example, a cooling fan, such as a centrifugal fan or a turbine fan. By providing the cooling assembly 60, the mid-axle electric wheels 42, the rear-axle electric wheels 52, and the electric drive controller 30 can all be cooled, providing convenient cooling.

[0041] Furthermore, if Figure 3-Figure 5 As shown, the cooling assembly 60 includes an electric drive controller cooling fan 61. The electric drive controller cooling fan 61 is located on a side of the rear axle housing 51 away from the center axle housing 41 and is fixed to the vehicle frame 20. The electric drive controller cooling fan 61 is connected to the electric drive controller 30 via a first duct 71. The electric drive controller cooling fan 61 is configured to blow air generated by the electric drive controller 30 through the first duct 71 to cool the electric drive controller 30. By providing a separate electric drive controller cooling fan 61 to cool the electric drive controller 30 and the separate first duct 71, various components within the electric drive controller 30, such as the inductor, inverter, and rectifier, can be directly cooled. Furthermore, the placement of the electric drive controller cooling fan 61 on the side of the rear axle housing 51 away from the center axle housing 41 eliminates the need for the first duct 71, saving space and cost.

[0042] Furthermore, if Figure 3-Figure 9As shown, the cooling assembly 60 also includes a mid-axle cooling fan 63. The mid-axle assembly 40 also includes a mid-axle A-frame 44. One end of the mid-axle A-frame 44 is connected to the mid-axle axle housing 41, and the other end of the mid-axle A-frame 44 is connected to the vehicle frame 20. The other end of the mid-axle A-frame 44 may be provided with a mounting hole. A connecting block is provided on the lower side of the middle portion of the vehicle frame 20. The mounting hole of the mid-axle A-frame 44 is partially hinged to the connecting block, thereby further securing the mid-axle assembly 40 to the vehicle frame 20. The mid-axle cooling fan 63 is located on the upper side of the mid-axle A-frame 44 and is connected to the mid-axle A-frame 44. In this embodiment, the middle axle A-frame 44 may be composed of two oblique arms, one end of which is connected together to form an end portion, which may be, for example, the end of the A-frame connected to the vehicle frame 20. The other ends of the two oblique arms are spaced apart and connected to the middle portion of the middle axle housing 41. The A-frame structure provides greater stability and reliability in torque transmission. The two oblique arms can bear forces in different directions, thereby reducing stress concentration. The A-frame is hollow inside, and the middle axle housing 41 may also be formed with a first inner cavity 411. This allows the middle axle cooling fan 63 to pass through the A-frame to the middle axle housing 41 and then to the middle axle electric wheel 42, thereby providing air cooling for the traction motor within the middle axle electric wheel 42. When the traction motor is working, the middle bridge cooling fan 63 starts to start. The wind blown by the middle bridge cooling fan 63 passes through the inside of the middle bridge A-frame 44 and then reaches the first inner cavity 411 inside the middle bridge bridge housing 41, so as to blow air to cool the traction motor. The middle bridge cooling fan 63 is directly fixed on the middle bridge A-frame 44, which saves the setting of pipelines and eliminates the need to set up a separate air duct to cool the traction motor, which can further save space.

[0043] Furthermore, a vent 441 is provided on one side of the middle bridge A-frame 44 close to the middle bridge cooling fan 63, and the air outlet of the middle bridge cooling fan 63 corresponds to the vent 441; an air outlet 442 is provided on one end of the middle bridge A-frame 44 close to the middle bridge housing 41, and the vent 441 is communicated with the air outlet 442; the middle bridge housing 41 has a first inner cavity 411, and cooling holes 442 are respectively communicated with the first inner cavity 411. The air inlet 412 and the cooling air outlet 413 correspond to and are connected with the air outlet 442 . The cooling air outlet 413 is arranged corresponding to the middle bridge electric wheel 42 . The air outlet 442 , the cooling air inlet 412 , the first inner cavity 411 and the cooling air outlet 413 are connected in sequence to form a middle bridge cooling air duct 73 . The middle bridge cooling fan 63 cools the middle bridge electric wheel 42 through the middle bridge cooling air duct 73 . When the center axle cooling fan 63 is in operation, the air it blows passes through the outlet of the center axle cooling fan 63, then through the vent 441 of the center axle A-frame 44 into the interior of the A-frame, then through the outlet 442 of the center axle A-frame 44 and the cooling air inlet 412 of the center axle housing 41 into the first inner cavity 411, then passes through the traction motor in the center axle electric wheel 42 to cool the traction motor in the center axle electric wheel 42, and then from the traction motor to the cooling air outlet 413 of the center axle housing 41, thereby cooling and dissipating the traction motor in the center axle electric wheel 42. The center axle cooling fan 63 eliminates the need for additional piping to cool the center axle electric wheel 42, further saving costs.

[0044] Furthermore, the mid-bridge electric wheel 42 includes a mid-bridge traction motor 421 and a mid-bridge reducer 422. The mid-bridge traction motor 421 is located in the first inner cavity 411, and the mid-bridge reducer 422 is connected to the mid-bridge traction motor 421. The mid-bridge cooling fan 63 cools the mid-bridge traction motor 421 through the mid-bridge cooling air duct 73. The mid-bridge reducer 422 can be, for example, a wheel-side reducer, such as that used in existing mining dump trucks.

[0045] Furthermore, if Figure 6 、 Figure 8 and Figure 9As shown, the middle bridge housing 41 includes a middle section 415 and two end sections 416 located at opposite ends of the middle section 415; the cooling air inlet 412 is located on the middle section 415; the middle bridge traction motor 421 includes a motor body 4211 and a connecting flange 4212, the connecting flange 4212 is arranged around the motor body 4211, and the connecting flange 4212 is clamped between the end section 416 and the middle section 415; the opposite ends of the motor body 4211 are respectively located in the end section 416 and the middle section 415; a cooling hole 4213 may be formed between the connecting flange 4212 and the outer shell of the motor body 4211; the cooling air inlet 412 is connected to the cooling air outlet 413 through the cooling hole 4213 and the internal gap of the rotor 42112 of the middle bridge traction motor 421, Figure 9In the figure, the dotted arrow indicates the blowing path of the wind blown out of the middle bridge cooling air outlet after entering the middle bridge bridge housing 41 from the inside of the middle bridge A-frame 44, that is, part of the path of the middle bridge cooling air duct 73. The motor body 4211 may, for example, include a stator 42111 and a rotor 42112. The inner wall of the middle bridge bridge housing 41 (including the middle section 415 and the end section 416) is spaced apart from the outer shell of the stator 42111, and the connecting flange 4212 is connected to the motor body 42111, for example, by a plurality of connecting blocks, and the plurality of connecting blocks are spaced apart along the circumference of the motor body 4211, and the gaps between the two connecting blocks form a plurality of cooling holes 4213. In this way, the connecting flange 4212 can be connected to the motor body 4211 while ensuring that the airflow enters the internal gap of the rotor 42112 from the cooling air holes 42113 on the stator 42111, and finally from the rotor The internal gap of 42112 passes through the opening on the other end cover of the stator 42111 and enters the middle part of the middle bridge housing 41, and is finally blown out to the external environment from the cooling air outlet 413. Through the above arrangement, the air flow blown into the middle bridge housing 41 can pass through the interior of the motor body 4211, and can more fully contact the motor body 4211, thereby improving the cooling efficiency. The main cooling position in the motor body 4211 is the coil of the rotor 42112. Through the above path, the air flow can flow through the internal gap of the rotor 42112 and fully contact the coil, thereby improving the cooling effect. In this embodiment, a circle of protrusions 414 can be provided on the inner wall of the middle section 415 of the middle bridge housing 41. The protrusions 414 can be, for example, components that protrude from the inner wall of the middle bridge housing 41 toward the motor body 4211. The protrusions 414 are, for example, provided between the two cooling air inlets 412 of the middle section 415. The protrusions 414 can abut against the outer wall of the middle bridge traction motor 421. Specifically, the protrusions 414 can abut against the outer wall of one end of the stator 42111 in the motor body 4211 provided in the middle section 415, so that air blown in from the cooling air inlet 412 Airflow into the first inner cavity 411 cannot be blown directly from one end of the motor body 4211 within the middle section 415 to the cooling outlet 413. Instead, as described in the previous embodiment, it passes through the cooling holes 4213 of the connecting flange 4212, then through the cooling holes 42113 provided on the stator 42111, into the internal gap of the rotor 42112, and finally into the first inner cavity 411 before being blown out of the cooling outlet 413. The protrusion 414 can be, for example, a bump. This arrangement increases the cooling airflow path, ensures effective cooling and heat dissipation, and prevents air waste.

[0046] Furthermore, the mid-axle assembly 40 further includes, for example, a mid-axle temperature sensor and a mid-axle controller. The mid-axle temperature sensor is disposed within the mid-axle traction motor 421 and is electrically connected to the mid-axle controller, which is in turn electrically connected to the mid-axle cooling fan 63. The mid-axle controller is configured to control the speed of the mid-axle cooling fan 63 based on temperature data transmitted by the mid-axle temperature sensor. The mid-axle temperature sensor may, for example, include a stator temperature sensor and a bearing temperature sensor corresponding to the mid-axle traction motor 421. Alternatively, the mid-axle temperature sensor may be disposed within the stator coil. The mid-axle controller may, for example, be disposed on the vehicle frame 20 and may control the speed of the mid-axle cooling fan 63 based on the temperature of the mid-axle traction motor 421 measured by the mid-axle temperature sensor. For example, when it is detected that the temperature of the middle bridge traction motor 421 increases, the speed of the middle bridge cooling fan 63 can be controlled to increase to provide a larger air volume. When it is detected that the temperature of the middle bridge traction motor 421 decreases, the speed of the middle bridge cooling fan 63 can be controlled to decrease. In this way, a suitable air volume can be provided to ensure good heat dissipation while avoiding energy waste.

[0047] Furthermore, the cooling assembly 60 also includes a rear axle cooling fan 62, which is arranged on the side of the middle axle housing 41 away from the rear axle housing 51, that is, the rear axle cooling fan 62 is arranged on the side of the middle axle housing 41 close to the driver's cab 10 and is fixed on the vehicle frame 20, and the rear axle cooling fan 62 is connected to the rear axle housing 51 through a second pipe 72.

[0048] Since the cooling fans in the prior art usually use a large fan to dissipate heat for the electric drive controller 30, the middle bridge electric wheel 42 and the rear axle electric wheel 52, the generator, the traction motor and other components, the power of the large fan needs to be large enough to achieve simultaneous heat dissipation of the electric drive controller 30, the middle bridge electric wheel 42 and the rear axle electric wheel 52. However, in this way, the cooling air volume can only be calculated based on the component with the greatest cooling demand at a certain moment, thereby controlling the speed of the large fan. The cooling air volume of the remaining components may be surplus, resulting in excessive power consumption by the large fan and insufficient energy saving. The present application can set up an electric drive controller cooling fan 61, a middle bridge cooling fan 63 and a rear axle cooling fan 62 to cool the electric drive controller 30, the middle bridge electric wheel 42 and the rear axle electric wheel 52 respectively. There is no need for a large fan to dissipate heat centrally. The heat is dissipated separately by three fans, and the power used is also less than the power used by the large fan, which is more energy-efficient than the prior art.

[0049] Furthermore, if Figure 10-13As shown, the rear axle electric wheel 52 includes a rear axle traction motor 521 and a rear axle reducer 522. The rear axle housing 51 has a second inner cavity 511. At least part of the rear axle traction motor 521 is located in the second inner cavity 511. The rear axle reducer 522 is connected to the rear axle traction motor 521. The vehicle frame also includes a rear axle A-shaped frame 53. One end of the rear axle A-shaped frame 53 is connected to the rear axle housing 51, and the other end of the rear axle A-shaped frame 53 is connected to the middle axle assembly 40. A rear axle air inlet 53 is provided on the side wall of the rear axle A-shaped frame 53. 1. The air outlet of the second duct 72 corresponds to and communicates with the rear axle air inlet 531. A rear axle air outlet 532 is provided at one end of the rear axle A-frame 53 near the rear axle housing 51. The rear axle air outlet 532 is respectively connected to the rear axle air inlet 531 and the second inner cavity 511. The second duct 72, the rear axle air inlet 531, and the rear axle air outlet 532 are connected to the second inner cavity 511 to form a rear axle cooling air duct. The rear axle cooling fan 62 cools the rear axle traction motor 521 through the rear axle cooling air duct. The rear axle A-frame 53 can be composed of two oblique arms, one end of which is connected to form an end portion that can be fixedly connected to the vehicle frame 20. The other ends of the two oblique arms are spaced apart to form an A-shaped structure. The other ends of the two oblique arms are spaced apart and respectively connected to the middle portion of the rear axle housing 51. In this embodiment, the number of second ducts 72 may be, for example, two. One end of each of the two second ducts 72 is connected to the rear axle cooling fan 62, and the other end of each of the two second ducts 72 is connected to the two diagonal arms of the rear axle A-frame 53. A rear axle air inlet 531 is provided on the outer side of each of the two diagonal arms of the rear axle A-frame 53. The air outlets of the two second ducts 72 are connected to the two rear axle air inlets 531. The air generated by the rear axle cooling fan 62 is transmitted through the second ducts 72 to the rear axle air inlet 531 of the rear axle A-frame 53, then to the rear axle air outlet 532, then to the rear axle cooling air inlet 512 corresponding to the rear axle air outlet 532, and then to the second inner cavity 511. The air is then blown to cool the rear axle electric wheels 52, and finally discharged through the rear axle cooling air outlet 513. The rear axle wheels 523 may, for example, be composed of a rear hub and rear wheels. The specific structure of the rear axle traction motor 521 can refer to the specific structure of the above-mentioned middle axle traction motor 421. When the air blown out by the rear axle cooling fan 62 reaches the rear axle A-frame 53 and then reaches the second inner cavity 511 in the rear axle bridge housing 51, its specific cooling path can also refer to the cooling path of the air blown out by the above-mentioned middle axle cooling fan 63 reaching the inside of the middle axle A-frame 44 and then reaching the first inner cavity 411 in the middle axle bridge housing 41. The details will not be repeated here.

[0050] Furthermore, the rear axle assembly 50 also includes a rear axle temperature sensor and a rear axle controller. The rear axle temperature sensor is disposed within the rear axle traction motor 521 and is electrically connected to the rear axle controller, which is in turn electrically connected to the rear axle cooling fan 62. The rear axle controller is configured to control the speed of the rear axle cooling fan 62 based on temperature data transmitted by the rear axle temperature sensor. The rear axle temperature sensor may, for example, include a stator temperature sensor and a bearing temperature sensor corresponding to the rear axle traction motor 521. Alternatively, the rear axle temperature sensor may be disposed within the stator coil. The rear axle controller may, for example, be disposed on the vehicle frame 20 and may control the speed of the rear axle cooling fan 62 based on the temperature of the rear axle traction motor 521 measured by the rear axle temperature sensor. For example, when it is detected that the temperature of the rear axle traction motor 521 increases, the speed of the rear axle cooling fan 62 can be controlled to increase to provide a larger air volume. When it is detected that the temperature of the rear axle traction motor 521 decreases, the speed of the rear axle cooling fan 62 can be controlled to decrease. In this way, a suitable air volume can be provided to ensure good heat dissipation while avoiding energy waste and achieving energy-saving effects.

[0051] In addition, it can be understood that the aforementioned embodiments are merely exemplary descriptions of the present invention. Under the premise that the technical features do not conflict, the structures do not contradict, and the purpose of the present invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used in combination.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A mining dump truck (1), characterized in that: include: Frame (20); A mid-bridge assembly (40) mounted on the lower side of the vehicle frame (20); A rear axle assembly (50) is mounted on the lower side of the vehicle frame (20) and is spaced apart from the middle axle assembly (40); an electric drive controller (30) disposed on the vehicle frame (20) and located between the mid-axle assembly (40) and the rear axle assembly (50); The middle axle assembly (40) includes a middle axle housing (41), a middle axle electric wheel (42) and a middle axle suspension cylinder, the middle axle housing (41) is arranged in the middle of the vehicle frame (20), and the two middle axle electric wheels (42) are respectively mounted on both ends of the middle axle housing (41); the rear axle assembly (50) includes a rear axle housing (51), a rear axle electric wheel (52) and a rear axle suspension cylinder, the rear axle housing (51) is arranged at the rear end of the vehicle frame (20), and the two rear axle electric wheels (52) are respectively mounted on both ends of the rear axle housing (51); the electric drive controller (30) is arranged between the middle axle housing (41) and the rear axle housing (51), and is respectively electrically connected to the two middle axle electric wheels (42) and the two rear axle electric wheels (52).

2. The mining dump truck (1) according to claim 1, characterized in that: The mining dump truck (1) further comprises: a cooling assembly (60), the cooling assembly (60) being arranged on the vehicle frame (20) and electrically connected to the electric drive controller (30), the cooling assembly (60) being used to cool the middle axle electric wheel (42), the rear axle electric wheel (52) and the electric drive controller (30).

3. The mining dump truck (1) according to claim 2, characterized in that: The cooling assembly (60) includes an electric drive controller cooling fan (61), which is arranged on a side of the rear axle housing (51) away from the middle axle housing (41) and fixed to the vehicle frame (20); the electric drive controller cooling fan (61) is connected to the electric drive controller (30) through a first pipe (71), and the electric drive controller cooling fan (61) is used to blow generated air from the first pipe (71) to the electric drive controller (30) and cool the electric drive controller (30).

4. The mining dump truck (1) according to claim 3, characterized in that: The cooling assembly (60) further includes a middle bridge cooling fan (63), and the middle bridge assembly (40) further includes a middle bridge A-type frame (44), one end of the middle bridge A-type frame (44) is connected to the middle bridge axle housing (41), and the other end of the middle bridge A-type frame (44) is connected to the vehicle frame (20), and the middle bridge cooling fan (63) is located on the middle bridge A-type frame (44) and connected to the middle bridge A-type frame (44).

5. The mining dump truck (1) according to claim 4, characterized in that: A vent (441) is provided on one side of the middle bridge A-shaped frame (44) close to the middle bridge cooling fan (63), and the air outlet of the middle bridge cooling fan (63) corresponds to the vent (441); an air outlet (442) is provided on one end of the middle bridge A-shaped frame (44) close to the middle bridge housing (41), and the vent (441) is connected to the air outlet (442); the middle bridge housing (41) has a first inner cavity (411), and cooling air inlets ( The cooling air inlet (412) and the cooling air outlet (413) correspond to and are connected with the air outlet (442), and the cooling air outlet (413) is arranged corresponding to the middle bridge electric wheel (42). The air outlet (442), the cooling air inlet (412), the first inner cavity (411) and the cooling air outlet (413) are sequentially connected to form a middle bridge cooling air duct (73), and the middle bridge cooling fan (63) cools the middle bridge electric wheel (42) through the middle bridge cooling air duct (73).

6. The mining dump truck (1) according to claim 5, characterized in that: The middle bridge electric wheel (42) includes a middle bridge traction motor (421) and a middle bridge reducer (422); the middle bridge traction motor (421) is located in the first inner cavity (411); the middle bridge reducer (422) is connected to the middle bridge traction motor (421); and the middle bridge cooling fan (63) cools the middle bridge traction motor (421) through the middle bridge cooling air duct (73).

7. The mining dump truck (1) according to claim 6, characterized in that: The middle bridge housing (41) includes a middle section (415) and two end sections (416) located at opposite ends of the middle section (415); the cooling air inlet (412) is located on the middle section (415); the middle bridge traction motor (421) includes a motor body (4211) and a connecting flange (4212), the connecting flange (4212) is arranged around the motor body (4211), and the connecting flange (4212) is clamped between the end sections (416) and the motor body (4211). The motor body (4211) is provided with a plurality of connecting flanges (4212) and a plurality of connecting flanges (4213). The connecting flanges (4212) and the plurality of connecting flanges (4213) are connected to each other. The connecting flanges (4212) and the plurality of connecting flanges (4213) are connected to each other. The connecting flanges (4212) and the plurality of connecting flanges (4213) are connected to each other. The connecting flanges (4212) and the plurality of connecting flanges (4213) are connected to each other. The connecting flanges (4212) and the plurality of connecting flanges (4213) are connected to each other.

8. The mining dump truck (1) according to claim 6, characterized in that: The mid-bridge assembly (40) further includes a mid-bridge temperature sensor and a mid-bridge controller. The mid-bridge temperature sensor is disposed in the mid-bridge traction motor (421). The mid-bridge temperature sensor is electrically connected to the mid-bridge controller. The mid-bridge controller is electrically connected to the mid-bridge cooling fan (63). The mid-bridge controller is used to control the rotation speed of the mid-bridge cooling fan (63) according to temperature data sent by the mid-bridge temperature sensor.

9. The mining dump truck (1) according to claim 4, characterized in that: The cooling assembly (60) further includes a rear axle cooling fan (62), which is arranged on a side of the middle axle housing (41) away from the rear axle housing (51) and fixed to the vehicle frame (20), and is connected to the rear axle housing (51) via a second pipe (72).

10. The mining dump truck (1) according to claim 9, characterized in that: The rear axle electric wheel (52) includes a rear axle traction motor (521) and a rear axle speed reducer (522), the rear axle housing (51) has a second inner cavity (511), the rear axle traction motor (521) is located in the second inner cavity (511), and the rear axle speed reducer (522) is connected to the rear axle traction motor (521); the rear axle assembly (50) also includes a rear axle A-shaped frame (53), one end of the rear axle A-shaped frame (53) is connected to the rear axle housing (51), the other end of the rear axle A-shaped frame (53) is connected to the vehicle frame (20), and a rear axle air inlet (53) is provided on the side wall of the rear axle A-shaped frame (53). 1), the air outlet of the second duct (72) corresponds to and is connected to the rear axle air inlet (531), a rear axle air outlet (532) is provided at one end of the rear axle A-frame (53) close to the rear axle housing (51), the rear axle air outlet (532) is respectively connected to the rear axle air inlet (531) and the second inner cavity (511), the second duct (72), the rear axle air inlet (531), the rear axle air outlet (532) and the second inner cavity (511) are connected to form a rear axle cooling air duct, and the rear axle cooling fan (62) cools the rear axle traction motor (521) through the rear axle cooling air duct.

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