Pure electric drive motor type mine truck, cooling system and drive motor cooling method

Abstract

The invention discloses a cooling system which comprises a first air duct, a cooling fan, a second air duct and a driving motor, flanges on two sides of the driving motor are respectively provided with a motor air inlet and a motor air outlet, a cavity is arranged between the outer wall of the driving motor and a core, and the cavity is communicated with the motor air inlet and the motor air outlet; the cooling fan is provided with a fan air inlet and a fan air outlet, the first air duct is connected to the fan air inlet, and the two ends of the second air duct are connected with the fan air outlet and the motor air inlet respectively. The invention further discloses a pure electric driving motor type mine truck and a driving motor cooling method. The cooling mode adopted by the driving motor is forced air cooling, the driving motor is provided with an independent fan, cooling air is transmitted to the driving motor from the outside through a cooling air duct, the cooling air is forced to circulate in the driving motor and is finally exhausted from an air outlet in the tail of the driving motor, and cooling of the driving motor is achieved.

Description

Technical Field

[0001] This invention belongs to the field of mining dump trucks, specifically relating to a pure electric drive motor type mining truck, a cooling system, and a method for cooling the drive motor. Background Technology

[0002] With the further advancement of energy conservation, emission reduction, and green mining, pure electric mining trucks are gradually being deployed in mines, replacing traditional fuel-powered vehicles, reducing production costs, decreasing carbon emissions, and improving production efficiency. Currently, pure electric mining trucks primarily use power batteries as their main power source, driving an electric motor to propel the vehicle. The powertrain is the primary drive system for pure electric mining trucks, consisting of a drive motor and a gearbox. The drive motor rotates to drive the gearbox, thus propelling the vehicle.

[0003] The powertrain is primarily water-cooled, requiring a radiator at the front of the vehicle. Heat exchange is achieved through water circulation, thus cooling the powertrain. The powertrain, consisting of a drive motor and transmission, is complex and difficult to maintain and repair. Furthermore, the powertrain is located at the rear of the vehicle, while the radiator is at the front. Cooling pipes need to extend from the radiator at the front to the drive motor at the rear, resulting in a large span. The complex equipment arrangement inside the vehicle frame further complicates the cooling pipe layout, making installation and maintenance of the cooling system complicated. Leaks in the water connections are also prone to occur, leading to lower reliability of the cooling system. Summary of the Invention

[0004] The purpose of this invention is to provide a pure electric drive motor type mining car, a cooling system and a drive motor cooling method. The drive motor adopts forced air cooling. The drive motor is equipped with an independent fan, which transmits cooling air from the outside to the drive motor through the cooling air duct. The forced cooling air circulates inside the drive motor and is finally discharged from the air outlet at the rear of the drive motor, thereby achieving cooling of the drive motor.

[0005] To achieve the above objectives, the technical solution used in this invention is: The cooling system includes: a first air duct, a cooling fan, a second air duct, and a drive motor. The drive motor has a motor air inlet and a motor air outlet on its flanges on both sides. There is a cavity between the outer wall of the drive motor and the core, and the cavity connects the motor air inlet and the motor air outlet. The cooling fan has a fan air inlet and a fan air outlet. The first air duct is connected to the fan air inlet, and the two ends of the second air duct are connected to the fan air outlet and the motor air inlet, respectively.

[0006] Furthermore, connecting flanges are respectively provided at the ends of the motor air outlet and the second air duct, and the two ends of the hose are respectively connected to the connecting flanges of the motor air outlet and the second air duct.

[0007] A pure electric drive motor type mining truck includes: a frame, a vehicle platform, a cooling system, a cooling fan, a second air duct fixed at the rear of the frame, and a first air duct fixed above the vehicle platform.

[0008] Cooling methods for drive motors include: When the vehicle is running, the drive motor works, and after the cooling fan comes into play, the cooling air enters from the first air duct and is transmitted to the drive motor through the second cooling air duct. Cooling air enters the cavity through the motor inlet of the drive motor, flows evenly inside the drive motor, and is discharged from the motor outlet at the rear of the drive motor, carrying away the heat generated by the drive motor.

[0009] Preferably, as the load increases, the drive motor begins to generate heat, and then the cooling fan intervenes, drawing in cooling air through a first air duct located above the vehicle platform.

[0010] The technical effects of this invention include: This invention directly drives the vehicle by using a drive motor. The drive motor is cooled by forced air cooling. The drive motor is equipped with an independent fan, which transmits cooling air from the outside to the drive motor through a cooling air duct. The forced cooling air circulates inside the drive motor and is finally discharged from the exhaust port at the rear of the drive motor, thus achieving direct cooling of the drive motor and solving the technical defects of existing water cooling technology.

[0011] 1. The mining vehicle of this invention uses a drive motor and does not have a gearbox for shifting, which greatly improves the transmission efficiency of the whole vehicle, optimizes the vehicle structure layout, simplifies the transmission structure, and improves transmission efficiency.

[0012] This invention employs a drive motor, with power directly transmitted from the drive motor to the rear axle wheel via a transmission shaft. This differs from the powertrain system where power is first transmitted from the motor to the gearbox, and then from the gearbox to the rear axle wheel via the transmission shaft. The drive motor has a simpler structure, fewer components, and fewer potential failure factors, thus improving the overall vehicle reliability.

[0013] 2. This invention employs an air-cooled drive motor. The drive motor has an internal cavity to allow cooling air to fully enter and achieve uniform cooling. Simultaneously, an air inlet is located at the top of the drive motor, and an air outlet is located at the rear, ensuring that cooling air can circulate throughout the entire drive motor interior.

[0014] 3. This invention uses a forced air-cooled drive motor, replacing the radiator with a cooling fan, which reduces the need for large-span cooling pipe layouts that use water cooling. Compared with water-cooled drive motors, the overall vehicle layout is more compact, reducing leakage points and improving the reliability of the vehicle cooling system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cooling system of the pure electric drive motor type mining truck in this invention. Detailed Implementation

[0016] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] like Figure 1 The diagram shown is a schematic diagram of the cooling system of the pure electric drive motor type mining truck in this invention.

[0020] The cooling system of the pure electric drive motor type mining truck includes: a first air duct 1, a cooling fan 2, a second air duct 3, and a drive motor 4; the drive motor 4 has a motor air inlet 41 and a motor air outlet 42 respectively on the flanges on both sides; the cooling fan 2 has a fan air inlet 21 and a fan air outlet 22, the first air duct 1 is connected to the fan air inlet 21, and the two ends of the second air duct 3 are connected to the fan air outlet 22 and the motor air inlet 41 respectively.

[0021] A cavity 43 is provided between the outer wall of the drive motor 4 and the core, and the cavity 43 connects the motor air inlet 41 and the motor air outlet 42.

[0022] The drive motor 4 has a wide adjustable speed range. When the vehicle is running, the drive motor 4 directly drives the vehicle differential through the transmission shaft, thereby driving the vehicle to run. This eliminates the need for a gearbox, resulting in a simple structure and high transmission efficiency. Cooling air flows from the outside through the first air duct 1, the cooling fan 2, the second air duct 3, and the cavity 43 of the drive motor 4, finally exiting from the motor outlet 42 of the drive motor 4.

[0023] The cooling system converts the cooling method of the drive motor 4 to forced air cooling. External cooling air is transferred to the drive motor 4 via the cooling fan 2. This forced cooling air circulates within the cavity 43 of the drive motor 4, and through radially evenly distributed cavity channels, it evenly carries away the heat generated by the drive motor 4, expelling it from the motor exhaust port 42 at the rear of the drive motor 4, thus achieving heat exchange. Furthermore, the drive motor has no other exhaust ports, ensuring that the cooling air reaches all parts of the drive motor 4, providing sufficient and even heat dissipation.

[0024] The first air duct 1, cooling fan 2, and second air duct 3 are located close to the drive motor 4. The cooling fan 2 and second air duct 3 can be fixed to the rear of the vehicle frame, while the first air duct 1 is fixed above the vehicle platform. This makes the system easy to install and greatly reduces the airflow distance, which reduces flow resistance and improves the cooling effect.

[0025] Connecting flanges 5 are respectively provided at the ends of the motor air outlet 42 and the second air duct 3, and the two ends of the flexible hose 6 are respectively connected to the connecting flanges 5 of the motor air outlet 42 and the second air duct 3. This facilitates the connection of the drive motor 4 and avoids the vibration of the drive motor 4 and the cooling fan 2 from affecting the firmness of the connection.

[0026] The specific steps for cooling the drive motor are as follows: 1. When the vehicle is running, the drive motor 4 works. After the cooling fan 2 is engaged, the cooling air enters from the first air duct 1 and is transmitted to the drive motor 4 through the second cooling air duct 3. As the load increases, the drive motor 4 begins to generate heat, and the cooling fan 2 intervenes, drawing in cooling air through the first air duct 1 located above the vehicle platform.

[0027] 2. Cooling air enters the cavity 43 through the motor air inlet 41 of the drive motor 4, flows evenly and fully inside the drive motor 4 through the cavity 43, and finally exits from the motor air outlet 42 at the tail of the drive motor 4, carrying away the heat generated by the drive motor 4, realizing heat exchange, and thus achieving the purpose of cooling the drive motor 4.

[0028] The terminology used in this invention is descriptive and exemplary, not restrictive. Since this invention can be embodied in many forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A cooling system, characterized in that, include: The system consists of a first air duct, a cooling fan, a second air duct, and a drive motor. The drive motor has an air inlet and an air outlet on its flanges on both sides. There is a cavity between the outer wall of the drive motor and the core, which connects the air inlet and the air outlet. The cooling fan has an air inlet and an air outlet. The first air duct is connected to the air inlet, and the two ends of the second air duct are connected to the air outlet and the motor inlet, respectively.

2. The cooling system as described in claim 1, characterized in that, Connecting flanges are provided at the ends of the motor air outlet and the second air duct, and the two ends of the hose are connected to the connecting flanges of the motor air outlet and the second air duct, respectively.

3. A pure electric drive motor type mining truck, comprising: The vehicle frame and vehicle platform are characterized by having a cooling system as described in any one of claims 1 or 2, wherein a cooling fan and a second air duct are fixed to the rear of the vehicle frame, and a first air duct is fixed above the vehicle platform.

4. The cooling method for the drive motor of a pure electric drive motor mining truck as described in claim 3, characterized in that, include: When the vehicle is running, the drive motor works, and after the cooling fan comes into play, the cooling air enters from the first air duct and is transmitted to the drive motor through the second cooling air duct. Cooling air enters the cavity through the motor inlet of the drive motor, flows evenly inside the drive motor, and is discharged from the motor outlet at the rear of the drive motor, carrying away the heat generated by the drive motor.

5. The drive motor cooling method as described in claim 4, characterized in that, As the load increases, the drive motor begins to generate heat, and then the cooling fan comes into play, drawing in cooling air through the first air duct located above the vehicle platform.

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