A hybrid electric power transmission system and a dual-power rubber-wheeled transport vehicle

Abstract

The present invention belongs to the technical field of auxiliary transportation equipment for underground coal mines, and specifically relates to a hybrid electric power transmission system and a hybrid rubber-wheeled transport vehicle. The transmission system includes two power sources, an internal combustion engine and an electric motor. The internal combustion engine power source and the electric motor power source respectively achieve matching of the power source output speed and torque with the vehicle speed and load through their respective power shift transmissions. The front and rear output ends of the two power shift transmissions and the front and rear axles are connected in series via a drive shaft. Both power shift transmissions have a neutral gear position, and selecting one of the power shift transmissions to be engaged in the neutral gear position enables single power source input to the transmission system. The present invention is significantly more advanced than explosion-proof diesel engine transmission technology and explosion-proof electric motor transmission technology. Aiming at the actual operating conditions of rubber-wheeled transport vehicles in underground coal mines, a hybrid electric power transmission system and a hybrid electric power rubber-wheeled transport vehicle are designed. The vehicle combines the advantages of diesel engine vehicles with the flexibility and exhaust pollution of electric vehicles.

Description

Technical Field

[0001] The present invention belongs to the technical field of auxiliary transportation equipment in underground coal mines, and in particular relates to an oil-electric dual-power transmission system and a dual-power rubber-wheeled transport vehicle. Background Art

[0002] At present, most newly built and under-construction large-scale coal mines use explosion-proof diesel engine trackless rubber-tyred vehicles as the main transportation equipment to complete the auxiliary transportation of various materials underground. When these vehicles are in operation, the exhaust gas emitted by the explosion-proof diesel engine causes the air quality in the tunnel to deteriorate, seriously affecting the health of the driver and other underground workers. At the same time, the exhaust gas emissions of the explosion-proof diesel engine in the narrow and closed environment also deteriorate the diesel engine's own intake conditions, resulting in incomplete combustion and reduced power, causing fuel waste and exacerbating environmental pollution in the underground tunnel. Although the explosion-proof battery trackless rubber-tyred vehicle, which uses batteries as the energy supply device and is driven by an electric motor, has achieved zero exhaust emissions and improved the air quality in the tunnel, the low energy density of the battery, the high price, and the long charging time limit the scope of use of the explosion-proof battery trackless rubber-tyred vehicle, and its promotion and application are greatly restricted. Therefore, explosion-proof diesel engine trackless rubber-tyred vehicles powered by explosion-proof diesel engines are still widely used underground in coal mines. In order to reduce the impact of explosion-proof diesel engine exhaust, the only way is to increase the ventilation volume to dilute the harmful gases and reduce the impact of explosion-proof diesel engine exhaust on the health of underground workers. It is impossible to fundamentally solve the environmental pollution caused by explosion-proof diesel engine exhaust emissions and the labor protection issues of employees. Summary of the Invention

[0003] The present invention aims to solve the problem that the conventional underground rubber-wheeled transport vehicle uses a single explosion-proof diesel engine as the power, which aggravates the environmental pollution in the underground tunnel, and uses a single explosion-proof motor as the power, which limits the working range.

[0004] The present invention provides the following technical solution: an oil-electric dual-power transmission system, which includes two power sources: an internal combustion engine and an electric motor. The internal combustion engine power source and the electric motor power source respectively achieve power source output speed and torque matching the vehicle speed and load through their own power shift transmissions. The front and rear output ends and the front and rear axles of the two power shift transmissions are connected in series through a transmission shaft; both power shift transmissions have a neutral gear position, and one of the power shift transmissions is selected to be engaged in the neutral gear position to achieve single power source input to the transmission system.

[0005] Furthermore, the internal combustion engine power source includes an explosion-proof diesel engine, a gearbox is provided at the rear end of the explosion-proof diesel engine, the output end of the gearbox is connected to the input end of the front power shift gearbox via a diesel engine drive shaft, and the front output end of the front power shift gearbox is connected to the input end of the front axle via a front axle drive shaft;

[0006] The motor power source includes an explosion-proof motor, the output end of the explosion-proof motor is provided with a transition box, the output end of the transition box is connected to the input end of the rear power shift gearbox through the motor drive shaft; the rear output end of the rear power shift gearbox is connected to the input end of the rear axle through the rear axle drive shaft;

[0007] The rear output end of the front power shift transmission is shaft-coupled with the front output end of the rear power shift transmission.

[0008] Furthermore, the rear output end of the front power shift transmission is connected to the front output end of the rear power shift transmission via an articulated drive shaft and a rotary drive shaft, and the articulated drive shaft and the rotary drive shaft are connected via a universal joint.

[0009] Furthermore, the explosion-proof motor is located at the rear end of the rear axle, and the rear power shift gearbox is located at the front end of the rear axle. The explosion-proof motor and the rear power shift gearbox are located at a height that coincides with the rear axle. The transition box is a raised box, and the motor drive shaft passes over the rear axle to connect the rear power shift gearbox and the raised box.

[0010] The gearbox is a torque converter. The explosion-proof diesel engine and the torque converter are integrated and located at the front end of the front axle. The front power shift gearbox is located at the rear end of the front axle. The rear output end of the front power shift gearbox is aligned with the front output end of the rear power shift gearbox. The diesel engine drive shaft passes over the front axle to connect the torque converter and the front power shift gearbox.

[0011] Furthermore, the front output end and the rear output end of the front power shift transmission are on the same shaft inside the front power shift transmission, and the front output end and the rear output end of the front power shift transmission are always synchronized;

[0012] The front output end and the rear output end of the rear power shift transmission are on the same shaft inside the rear power shift transmission, and the front output end and the rear output end of the rear power shift transmission are always kept in sync.

[0013] A dual-power rubber-wheeled transport vehicle comprises the aforementioned oil-electric dual power transmission system; an internal combustion engine power source and an electric motor power source are respectively arranged on the front body and rear body of the rubber-wheeled transport vehicle, the front body and the rear body are hingedly connected, a front axle is arranged at the lower end of the front body, and the front axle is connected to the front body through a front leaf spring; front wheels are arranged at both ends of the front axle; a rear axle is arranged at the lower end of the rear body, and the rear axle is connected to the rear body through a rear leaf spring; rear wheels are arranged at both ends of the rear axle, the articulated part drive shaft is located at the articulation of the front body and the rear body, and the slewing part drive shaft is located at the front end of the rear body.

[0014] Furthermore, the explosion-proof diesel engine, the hydraulic torque converter, the front power shift gearbox, the rear power shift gearbox, the lift box, and the explosion-proof motor are arranged in a straight line along the length of the vehicle.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The present invention is significantly more advanced than the explosion-proof diesel engine transmission technology and the explosion-proof motor transmission technology. It designs a hybrid vehicle transmission system and a hybrid vehicle for rubber-wheeled transport vehicles based on the actual working conditions of underground coal mine rubber-wheeled transport vehicles. The vehicle combines the advantages of the flexibility of explosion-proof diesel engine vehicles and the exhaust pollution-free advantages of explosion-proof electric vehicles. In addition, the explosion-proof diesel engine adopts hydromechanical transmission, and the output characteristics of the explosion-proof diesel engine are matched with the vehicle load through the hydraulic torque converter and the front power shift gearbox; the explosion-proof motor adopts mechanical transmission, and the output characteristics of the explosion-proof motor are matched with the vehicle load through the lifting box and the rear power shift gearbox, thereby ensuring that the explosion-proof diesel engine and the explosion-proof motor both operate within their respective high-efficiency areas; the explosion-proof diesel engine, explosion-proof motor, front power shift gearbox, rear power shift gearbox are connected in series with the front axle and the rear axle, and have the characteristics of low vehicle center of gravity and uniform load distribution on the front and rear axles; at the same time, this series arrangement also has the characteristics of a simple transmission chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A side view of the hybrid powertrain.

[0018] Figure 2 This is a front view of the hybrid powertrain.

[0019] Figure 3 It is a dual-power rubber-wheeled transport vehicle equipped with an oil-electric dual power transmission system.

[0020] In the figure: 1- radiator; 2- explosion-proof diesel engine; 3- torque converter; 4- front axle; 5- front wheel; 6- front power shift gearbox; 7- articulated drive shaft; 8- slewing drive shaft; 9- rear axle drive shaft; 10- rear axle; 11- rear wheel; 12- explosion-proof motor; 13- lift box; 14- rear leaf spring; 15- motor drive shaft; 16- rear power shift gearbox; 17- front axle drive shaft; 18- diesel engine drive shaft; 19- front leaf spring; 20- front vehicle body; 21- rear vehicle body. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Example 1

[0023] This embodiment provides an oil-electric dual-power transmission system, which includes two power sources: an internal combustion engine and an electric motor. The internal combustion engine power source and the electric motor power source respectively use their own power shift transmissions to achieve power source output speed and torque matching the vehicle speed and load. The front and rear output ends and the front and rear axles of the two power shift transmissions are connected in series through a drive shaft; both power shift transmissions have a neutral gear position, and one of the power shift transmissions is selected to be engaged in the neutral gear position to achieve single power source input to the transmission system.

[0024] This dual-electric drive system can be powered by an onboard explosion-proof diesel engine or by an underground power grid, using explosion-proof motors for traction. When operating in auxiliary transport adits and main tunnels equipped with overhead wire networks, power is drawn from the underground power grid to the explosion-proof motors, which drive the vehicle, achieving zero emissions of harmful gases. When operating in areas without grid power, such as on the surface or in underground drifts, the vehicle is powered by an explosion-proof diesel engine, fully utilizing the vehicle's maneuverability and flexibility. This dual-powered rubber-wheeled transport vehicle, with its optional explosion-proof motor and diesel engine drive modes, combines the advantages of both electric and diesel drive modes.

[0025] like Figure 1 、 Figure 2 As shown, the internal combustion engine power source includes an explosion-proof diesel engine 2, with a gearbox installed at the rear end. The output end of the gearbox is connected to the input end of the front power-shift gearbox 6 via a diesel engine drive shaft 18. The front output end of the front power-shift gearbox 6 is connected to the input end of the front axle 4 via a front axle drive shaft 17. The electric motor power source includes an explosion-proof motor 12. The output end of the explosion-proof motor 12 is provided with a transition box. The output end of the transition box is connected to the input end of the rear power-shift gearbox 16 via a motor drive shaft 15. The rear output end of the rear power-shift gearbox 16 is connected to the input end of the rear axle 10 via a rear axle drive shaft 9. The rear output end of the front power-shift gearbox 6 is shaft-coupled to the front output end of the rear power-shift gearbox 16.

[0026] The gear positions of the front power-shift transmission 6 and the rear power-shift transmission 16 are interlocked, meaning that one gear is always in neutral at any given time. Gear interlocking methods for the front power-shift transmission 6 and the rear power-shift transmission 16 include, but are not limited to, electrical, mechanical, and hydraulic interlocking. When the explosion-proof diesel engine is operating, neutralizing the rear power-shift transmission ensures the transmission system is disconnected from the explosion-proof motor. When the explosion-proof motor is operating, neutralizing the front power-shift transmission ensures the transmission system is disconnected from the explosion-proof diesel engine.

[0027] When the gear position of the front power shift transmission 6 is in the neutral state, the explosion-proof motor 12 outputs power through the front and rear output ends of the front power shift transmission 6 to realize power transmission between the explosion-proof motor 12 and the front axle 4, and the neutral state of the front power shift transmission 6 is used to ensure the isolation of the vehicle transmission system and the power source of the explosion-proof diesel engine 2.

[0028] When the gear position of the rear power shift transmission 16 is in the neutral state, the output power of the explosion-proof diesel engine 2 is transmitted from the explosion-proof diesel engine 2 to the rear axle 10 through the front and rear output ends of the rear power shift transmission 16, and the neutral state of the rear power shift transmission 16 is used to ensure the isolation of the vehicle transmission system and the power source of the explosion-proof motor 12.

[0029] The rear output end of the front power shift transmission 6 is connected to the front output end of the rear power shift transmission 16 via an articulated transmission shaft 7 and a rotary transmission shaft 8 , and the articulated transmission shaft 7 and the rotary transmission shaft 8 are connected via a universal joint.

[0030] In order to reduce the space occupied by the oil-electric dual power transmission system, the explosion-proof motor 12 is located at the rear end of the rear axle 10, and the rear power shift gearbox 16 is located at the front end of the rear axle 10. The explosion-proof motor 12 and the rear power shift gearbox 16 are located at the same height as the rear axle 10. The transition box is a lifting box 13, and the motor drive shaft 15 passes over the rear axle 10 to connect the rear power shift gearbox 16 and the lifting box 13;

[0031] The gearbox is a torque converter 3. The explosion-proof diesel engine 2 is integrated with the torque converter 3 and is located at the front end of the front axle 4. The front power shift gearbox 6 is located at the rear end of the front axle 4. The rear output end of the front power shift gearbox 6 is aligned with the front output end of the rear power shift gearbox 16. The diesel engine drive shaft 18 passes over the front axle 6 to connect the torque converter 3 and the front power shift gearbox 6.

[0032] The front output end and the rear output end of the front power shift gearbox 6 are on the same shaft inside the front power shift gearbox 6, and the front output end and the rear output end of the front power shift gearbox 6 are always kept in sync; the front output end and the rear output end of the rear power shift gearbox 16 are on the same shaft inside the rear power shift gearbox 16, and the front output end and the rear output end of the rear power shift gearbox 16 are always kept in sync.

[0033] Example 2

[0034] like Figure 3As shown; this embodiment provides a dual-power rubber-wheeled transport vehicle using the oil-electric dual-power transmission system in Example 1, wherein the internal combustion engine power source and the electric motor power source of the oil-electric dual-power transmission system are respectively arranged on the front body 20 and the rear body 21 of the rubber-wheeled transport vehicle, the front body 20 is hingedly connected to the rear body 21, a radiator 1 and an explosion-proof diesel engine 2 are arranged at the front end of the front body 20, a front power shift gearbox 6 is arranged at the rear end of the front body 20, a front axle 4 is arranged at the lower end of the front body 20, and the front axle 4 is connected to the front body 20 through a front leaf spring 19; front wheels 5 are arranged at both ends of the front axle 4. An explosion-proof motor 12 is provided at the rear end of the rear body 21, and a rear axle 10 is provided at the lower end of the rear body 21, which is connected to the rear body 21 through a rear leaf spring 14; rear wheels 11 are provided at both ends of the rear axle 10, the hinged part drive shaft 7 is located at the hinge of the front body 20 and the rear body 21, and the rotating part drive shaft 8 is located at the front end of the body 21.

[0035] The explosion-proof diesel engine 2, the hydraulic torque converter 3, the front power shift gearbox 6, the rear power shift gearbox 16, the lifting box 13, and the explosion-proof motor 12 are arranged in a straight line along the vehicle length direction.

[0036] When the explosion-proof diesel engine 2 is working, the explosion-proof motor 12 needs to be in a stopped state, and the rear power shift gearbox 16 needs to be in a neutral state. At this time, the power of the explosion-proof diesel engine 2 is input into the front power shift gearbox 6 through the torque converter 3 and the diesel engine drive shaft 18. Part of the power transmitted by the front power shift gearbox 6 is input into the front axle 4 through the front axle drive shaft 17, and the vehicle is driven to move through the front wheels 5. The other part of the power transmitted by the power shift gearbox 6 is input into the rear axle 10 through the articulated drive shaft 7, the rotating drive shaft 8, the rear power shift gearbox 16 and the rear axle drive shaft 9, and the vehicle is driven to move through the rear wheels 11 to achieve four-wheel drive.

[0037] When the explosion-proof motor 12 is working, the explosion-proof diesel engine 2 needs to be in a stopped state, and the front power shift gearbox 6 gear needs to be in a neutral state. At this time, the power of the explosion-proof motor 12 is input into the rear power shift gearbox 16 through the lifting box 13 and the motor drive shaft 15. Part of the power transmitted by the rear power shift gearbox 16 is input into the rear axle 10 through the rear axle drive shaft 9, and the vehicle is driven to move through the rear wheels 11. The other part of the power transmitted by the rear power shift gearbox 16 is input into the front axle 4 through the rotating part drive shaft 8, the articulated part drive shaft 7, the front power shift gearbox 6 and the front axle drive shaft 17, and the vehicle is driven to move through the front wheels 5 to achieve four-wheel drive.

[0038] By setting the gear positions of the front power shift gearbox 6 and the rear power shift gearbox 16, one of the gear positions of the two gearboxes is always in a neutral state at any time and under any working conditions, thereby ensuring the mechanical interlocking between the two power sources of the explosion-proof diesel engine 2 and the explosion-proof motor 12.

[0039] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hybrid powertrain system, characterized by: The transmission system includes two power sources, an internal combustion engine and an electric motor. The internal combustion engine power source and the electric motor power source respectively achieve matching of the power source output speed and torque with the vehicle speed and load through their own power shift transmissions. The front and rear output ends of the two power shift transmissions and the front and rear axles are connected in series via a drive shaft. Both power shift transmissions have a neutral gear position. Selecting one of the power shift transmissions to be engaged in the neutral gear position allows the transmission system to have a single power source input while being isolated from the other power source. The internal combustion engine power source includes an explosion-proof diesel engine (2), a gearbox is provided at the rear end of the explosion-proof diesel engine (2), the output end of the gearbox is connected to the input end of the front power shift gearbox (6) via a diesel engine drive shaft (18), and the front output end of the front power shift gearbox (6) is connected to the input end of the front axle (4) via a front axle drive shaft (17); The motor power source includes an explosion-proof motor (12), the output end of the explosion-proof motor (12) is provided with a transition box, the output end of the transition box is connected to the input end of the rear power shift gearbox (16) through the motor transmission shaft (15); the rear output end of the rear power shift gearbox (16) is connected to the input end of the rear axle (10) through the rear axle transmission shaft (9); The rear output end of the front power shift transmission (6) is shaft-coupled to the front output end of the rear power shift transmission (16); The rear output end of the front power shift gearbox (6) and the front output end of the rear power shift gearbox (16) are connected via an articulated transmission shaft (7) and a rotary transmission shaft (8), and the articulated transmission shaft (7) and the rotary transmission shaft (8) are connected via a universal joint; The explosion-proof motor (12) is located at the rear end of the rear axle (10), and the rear power shift gearbox (16) is located at the front end of the rear axle (10). The explosion-proof motor (12) and the rear power shift gearbox (16) are located at a height that overlaps with the rear axle (10). The transition box is a lifting box (13). The motor drive shaft (15) passes over the rear axle (10) and connects the rear power shift gearbox (16) and the lifting box (13). The gearbox is a hydraulic torque converter (3), the explosion-proof diesel engine (2) and the hydraulic torque converter (3) are integrated and located at the front end of the front axle (4), the front power shift gearbox (6) is located at the rear end of the front axle (4), the rear output end of the front power shift gearbox (6) is aligned with the front output end of the rear power shift gearbox (16), and the diesel engine drive shaft (18) passes over the front axle (4) to connect the hydraulic torque converter (3) and the front power shift gearbox (6); The internal combustion engine power source and the electric motor power source are respectively arranged on the front body (20) and the rear body (21) of the rubber-wheeled transport vehicle, and the front body (20) and the rear body (21) are hingedly connected; the explosion-proof diesel engine (2), the hydraulic torque converter (3), the front power shift transmission (6), the rear power shift transmission (16), the lifting box (13), and the explosion-proof motor (12) are arranged in a straight line along the vehicle length direction.

2. A dual-power rubber-wheeled transport vehicle, characterized by: The invention comprises the oil-electric dual power transmission system as claimed in claim 1; the internal combustion engine power source and the electric motor power source are respectively arranged on the front body (20) and the rear body (21) of the rubber-wheeled transport vehicle, the front body (20) and the rear body (21) are hingedly connected, the lower end of the front body (20) is provided with a front axle (4), and the front axle (4) is connected to the front body (20) through a front leaf spring (19); front wheels (5) are provided at both ends of the front axle (4); the lower end of the rear body (21) is provided with a rear axle (10), and the rear axle (10) is connected to the rear body (21) through a rear leaf spring (14); rear wheels (11) are provided at both ends of the rear axle (10), the articulated drive shaft (7) is located at the articulation of the front body (20) and the rear body (21), and the slewing drive shaft (8) is located at the front end of the rear body (21).

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