Pure electric underground mine car power assembly

Abstract

A kind of pure electric underground mine car power assembly, including traction motor and reducer, traction motor is arranged above the reducer, the output shaft of traction motor is downward and is connected with the input shaft of reducer by spline;First gear and second gear are equipped on the input shaft of reducer, third gear and first conical gear are equipped on the transmission shaft of reducer, second conical gear is equipped on the output shaft of reducer, first gear is engaged with third gear, power is transmitted to first conical gear after one-stage speed change, first conical gear is engaged with second conical gear, further speed reduction is increased by the engagement of first conical gear and second conical gear, and the direction of rotation is changed, and finally power is output through the output shaft of reducer;Second gear is engaged with oil pump gear, drives oil pump after one-stage speed reduction, and the oil pressure established by oil pump is used to lubricate and cool the reducer.

Description

Technical Field

[0001] This utility model relates to the field of underground mining vehicle technology, and in particular to a pure electric underground mining vehicle powertrain. Background Technology

[0002] Underground mining trucks are one of the main transportation equipment in trackless underground mining operations. They are characterized by good power performance, maneuverability, versatility, and economy, making them suitable for heavy-duty, long-distance underground transportation operations. They are currently widely used in various suitable underground mines with significant results. With the continuous development and promotion of trackless mining technology, the market prospects for underground mining trucks are increasingly promising. At the same time, increasingly stringent requirements are being placed on the development of mining trucks, demanding higher levels of automation, safety, comfort, reliability, and environmental friendliness.

[0003] The underground mining truck with diesel engine is driven by a diesel engine. The diesel engine transmits power to the gearbox (which is integrated with the transfer case) through the drive shaft. The gearbox uses a dual-shaft output to the front and rear drive axles to enable the vehicle to move. However, the diesel truck does not meet environmental protection requirements.

[0004] The original oil extraction machine is replaced by a traction motor. The output shaft of the traction motor is connected to the original drive shaft, which transmits power to the gearbox (integrated with the transfer case). The gearbox uses a dual-shaft output, supplying power to the front and rear drive axles to enable vehicle movement. This traction motor + gearbox solution has low transmission efficiency and requires gear shifting, causing jerking during driving and a possibility of gear slippage. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pure electric underground mining vehicle powertrain that does not require gear shifting, can achieve stepless speed regulation of the vehicle, and has high system transmission efficiency; the system adopts a single motor setting, the motor control method is simple, reliable, and easy to implement.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a pure electric underground mining vehicle powertrain, including a traction motor and a reducer. The traction motor is located above the reducer and is connected to the reducer via a flange. The output shaft of the traction motor faces downward and is connected to the input shaft of the reducer via a spline. The reducer contains a transmission shaft. The input shaft and transmission shaft of the reducer are arranged longitudinally, while the output shaft of the reducer is arranged laterally. The input shaft and output shaft of the reducer are perpendicular. A first gear and a second gear are provided on the input shaft of the reducer. A third gear and a first bevel gear are provided on the transmission shaft of the reducer. A second bevel gear is provided on the output shaft of the reducer. The first gear meshes with the third gear, and the first bevel gear meshes with the second bevel gear. The second gear meshes with an oil pump gear. The principle of this utility model is as follows: by using a traction motor to directly drive the reducer, no gear shifting is required during vehicle movement, enabling stepless speed regulation of the vehicle, and the system transmission efficiency is high. The single-motor system setup simplifies motor control, increases reliability, and facilitates implementation.

[0007] As an improvement, the traction motor is an explosion-proof permanent magnet synchronous traction motor.

[0008] As an improvement, the traction motor includes a housing, a device disposed inside the housing, and a junction box disposed outside the housing. The housing is provided with a water-cooling channel, which is connected to a cooling system.

[0009] As an improvement, the output shaft of the reducer includes a front axle located on one side of the second bevel gear and a rear axle located on the other side of the second bevel gear. The front axle drives the front axle of the ore car, and the rear axle drives the rear axle of the ore car.

[0010] As an improvement, the outer wall of the reducer is provided with a condenser, and the oil pump is connected to the condenser.

[0011] As an improvement, a groove is provided on one side of the housing of the reducer, and an upper space, a middle space and a lower space are provided inside the reducer. The first gear, the second gear, the oil pump gear and the oil pump are located in the upper space, and one end of the oil pump extends into the groove and is connected to an oil pipe.

[0012] The beneficial effects of this utility model compared with the prior art are:

[0013] 1. The scheme of directly driving the reducer with the traction motor eliminates the need for gear shifting during vehicle movement, enabling stepless speed regulation and high system transmission efficiency.

[0014] 2. The system adopts a single motor setup, which features simple motor control, high reliability, and ease of implementation;

[0015] 3. The use of a high-speed, high-torque permanent magnet synchronous motor allows for more flexible design of the reducer;

[0016] 4. The traction motor adopts an explosion-proof design, which can be used in environments such as underground dust, flammable and explosive gases, and relatively confined spaces;

[0017] 5. It adopts a water-cooling method, with a compact system design and high cooling efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] Figure 2 This is a diagram showing the internal transmission relationship of the speed reducer. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 , 2 As shown, a pure electric underground mining truck powertrain includes a traction motor 1 and a reducer 2. The traction motor 1 is located above the reducer 2, with its output shaft facing downwards and connected to the input shaft 21 of the reducer 2 via a spline. The traction motor 1 is vertically mounted on the first-stage reducer 2 via a flange. The torque of the traction motor 1 and the reducer 2 is longitudinally coupled, while the output of the reducer 2 is lateral. In traction mode, the power supply provides power to the traction motor 1 through the traction controller. The traction motor 1 drives the reducer 2 to transmit traction power through the front and rear axles to the original mechanical drive axle, driving the vehicle. In electric braking mode, the traction motor 1 operates as a generator, converting kinetic energy into electrical energy, which is then recovered to the power supply through the traction controller and high-voltage box, improving energy utilization.

[0022] like Figure 1 , 2As shown, the reducer 2 has a transmission shaft 29 inside. The input shaft of the reducer 2 and the transmission shaft 29 are arranged longitudinally, while the output shaft of the reducer 2 is arranged laterally. The input shaft 21 and the output shaft 27 of the reducer 2 are perpendicular. The input shaft 21 of the reducer 2 has a first gear 22 and a second gear 23. The transmission shaft 29 of the reducer 2 has a third gear 24 and a first bevel gear 25. The output shaft 27 of the reducer 2 has a second bevel gear 26. The first gear 22 and the third gear 24 mesh, and after one stage of speed change, the power is transmitted to the first bevel gear 25. The first bevel gear 25 meshes with the second bevel gear 26. The first bevel gear 25 is a small gear, and the second bevel gear 26 is a large gear. Through the meshing of the first bevel gear 25 and the second bevel gear 26, the speed is further reduced and the torque is increased, and the direction of rotation is changed. Finally, the power is output through the output shaft 27 of the reducer 2. The second gear 23 meshes with the oil pump gear 28, and drives the oil pump 4 after a first-stage speed reduction. The oil pressure established by the oil pump 4 lubricates and cools the reducer 2.

[0023] like Figure 1 As shown, the traction motor 1 is an explosion-proof permanent magnet synchronous traction motor 1. The traction motor 1 adopts an explosion-proof design, making it suitable for environments with high dust levels, flammable and explosive gases, and relatively confined spaces, such as underground mines. The traction motor 1 includes a housing, a device housed within the housing, and a junction box located outside the housing. The housing contains a water-cooling channel connected to a cooling system. The water-cooling method offers several advantages: high efficiency (high heat transfer coefficient, maintaining efficient motor operation, increasing power density to over 5kW / kg); precise temperature control (avoiding permanent magnet demagnetization and extending insulation life); compact design (high cooling efficiency, saving installation space); strong adaptability (coping with high-load conditions, stable heat dissipation); reduced noise (reducing the number of components such as fans); and convenient maintenance and long lifespan of the water-cooling system, balancing high performance and reliability. The motor has a maximum speed of 5000rpm and a maximum torque of 2600Nm, making it a high-speed, high-torque traction motor 1. The high-speed + high-torque traction motor 1 configuration can reduce its size and weight, optimize the transmission ratio, make the structure more compact, reduce the efficiency loss of the reducer 2, and improve the dynamic response sensitivity. At the same time, it reduces the amount of material used in the reducer 2 and the processing difficulty, reduces costs, improves reliability, extends service life, and reduces the heat generation of the reducer 2, simplifies the heat dissipation system, and extends the maintenance cycle.

[0024] like Figure 1 , 2As shown, the output shaft of the reducer 2 includes a front axle located on one side of the second bevel gear 26 and a rear axle located on the other side of the second bevel gear 26. The front axle drives the front axle of the mining car, and the rear axle drives the rear axle of the mining car. A condenser 3 is provided on the outer wall of the reducer 2. The oil pump 4 is connected to the condenser 3. The internal water cooling of the traction motor 1 is connected to the condenser 3 via a water pipe. The condenser 3 is connected to the cooling system. The reducer 2 has its own lubricating oil pump 4 and condenser 3, resulting in a compact system design and high cooling efficiency. A groove is provided on one side of the reducer 2's outer casing. The reducer 2 has an upper space, a middle space, and a lower space. The first gear 22, the second gear 23, the oil pump gear, and the oil pump are located in the upper space. One end of the oil pump 4 extends into the groove and is connected to an oil pipe. The front axle of the reducer 2 extends out of the groove.

Claims

1. A pure electric underground mining vehicle powertrain, comprising a traction motor and a reducer, characterized in that: The traction motor is located above the reducer and is connected to the reducer via a flange. The output shaft of the traction motor faces downward and is connected to the input shaft of the reducer via a spline. The reducer contains a drive shaft. The input shaft and drive shaft of the reducer are arranged longitudinally, while the output shaft of the reducer is arranged laterally. The input shaft and output shaft of the reducer are perpendicular. The input shaft of the reducer is equipped with a first gear and a second gear. The drive shaft of the reducer is equipped with a third gear and a first bevel gear. The output shaft of the reducer is equipped with a second bevel gear. The first gear meshes with the third gear, and the first bevel gear meshes with the second bevel gear. The second gear meshes with the oil pump gear.

2. The pure electric underground mining vehicle powertrain according to claim 1, characterized in that: The traction motor is an explosion-proof permanent magnet synchronous traction motor.

3. The pure electric underground mining vehicle powertrain according to claim 2, characterized in that: The traction motor includes a housing, a device disposed inside the housing, and a junction box disposed outside the housing. The housing is provided with a water-cooling channel, which is connected to a cooling system.

4. The pure electric underground mining vehicle powertrain according to claim 1, characterized in that: The output shaft of the reducer includes a front axle located on one side of the second bevel gear and a rear axle located on the other side of the second bevel gear. The front axle drives the front axle of the ore car, and the rear axle drives the rear axle of the ore car.

5. The pure electric underground mining vehicle powertrain according to claim 1, characterized in that: The reducer has a condenser on its outer wall, and the oil pump is connected to the condenser.

6. The pure electric underground mining vehicle powertrain according to claim 1, characterized in that: The reducer has a groove on one side of its housing. The reducer has an upper space, a middle space and a lower space inside. The first gear, the second gear, the oil pump gear and the oil pump are located in the upper space. One end of the oil pump extends into the groove and is connected to an oil pipe.

Images