Hybrid power agricultural crawler walking system

Abstract

A hybrid power agricultural crawler walking system relates to the technical field of agricultural machinery and comprises a chassis, crawler walking parts, driving motors and motor controllers are arranged on two sides of the chassis, two groups of driving motors and two groups of motor controllers are arranged, and each group of motor controller and driving motor independently drives one group of crawler walking part. An engine, a gearbox, a control part, a main generator, a working part and a main battery pack are arranged on the chassis, the engine is arranged at the front part of the chassis, the gearbox is arranged at the rear part of the chassis, and the control part is arranged at the middle-upper part of the chassis; a flywheel at the output end of the engine is connected with an input shaft of the gearbox through a clutch, and the gearbox comprises a speed increasing output end and a speed reducing output end. The acceleration output end is connected with the input end of the main generator, the output end of the main generator is connected with the main battery pack, and the main battery pack supplies power to the driving motor; the speed reduction output end is connected with the working part; the control part is electrically connected with the motor controller, so that the chassis structure is effectively simplified, and the chassis is more convenient and flexible to mount and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery equipment, in particular to a hybrid power agricultural crawler walking system. Background Technique

[0002] For the mainstream crawler-type agricultural machinery on the market, such as crawler rotary tillers, crawler tractors, crawler harvesters, etc., most of their walking systems adopt mechanical designs. That is, through a series of mechanical connections, the engine power is decelerated and the torque is increased and transmitted to the drive wheels. To cope with complex working conditions, speed control is usually required. The current speed control schemes are mainly divided into two types: stepped speed change and stepless speed change.

[0003] For products with stepped speed change, different gear sets need to be engaged to provide multiple reduction ratios to form each control gear. When in use, the operator selects a suitable gear according to the real-time working conditions. The more gears there are, the more complex the mechanism design will be. And most products with stepless speed change will use hydraulic components such as "hydrostatic stepless transmission HST" and "variable pump + fixed-displacement motor" in cooperation with mechanical transmission to achieve, with a higher cost.

[0004] The mechanical walking system often uses a large number of mechanical components such as boxes, gears, shafts, belts, chains, etc. to participate in the transmission. At the same time, requirements such as spatial layout, lubrication, cooling, and sealing also need to be considered. The design is very complex. And limited by the above design, once the arrangement method of the crawler is determined, it is very difficult to change it again, lacking flexibility and versatility. Content of the Utility Model

[0005] I. Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a hybrid power agricultural crawler walking system, which reduces the use of a large number of mechanical components, effectively simplifies the chassis structure, and is more convenient and flexible for installation and maintenance.

[0007] II. Specific Technical Solutions

[0008] A hybrid agricultural crawler walking system includes a chassis. On both sides of the chassis, there are crawler walking parts, drive motors, and motor controllers. There are two sets of drive motors and motor controllers. Each set of motor controller and drive motor independently drives a set of crawler walking parts. An engine, a gearbox (6), a control unit, a main generator, working parts, and a main battery pack are arranged on the chassis. The engine is arranged at the front of the chassis, the gearbox is arranged at the rear of the chassis, and the control unit is arranged in the upper middle part of the chassis; the flywheel at the output end of the engine is connected to the input shaft of the gearbox through a clutch. The gearbox includes a speed-increasing output end and a speed-decreasing output end; the speed-increasing output end is connected to the input end of the main generator, and the output end of the main generator is electrically connected to the main battery pack through a generator controller. The main battery pack is used to supply power to the drive motor; the speed-decreasing output end is connected to the working parts through a universal shaft; the control unit is electrically connected to the motor controller.

[0009] Implementation principle, working principle:

[0010] In this solution, an engine provides power for the whole system. Usually, the input power of a diesel engine is greater than the actual required power of agricultural equipment. In this solution, the power provided by the diesel engine is divided into at least two groups of power through the gearbox. One group provides kinetic energy for the working parts through the speed-decreasing and torque-increasing of the gearbox and then through a universal shaft, which is convenient and flexible; the other group is supplied to the main generator through the speed-increasing output end of the gearbox for power generation. After speed-increasing, it can reach the optimal power generation speed of the main generator, and the power generation efficiency is better. The electric energy is stored in the main battery pack and supplied to the drive motor for operation; the output end of the drive motor is directly connected to the crawler walking part. Compared with the direct drive method of the engine, the deceleration and transmission components are omitted, effectively simplifying the chassis structure, and the installation and maintenance are more convenient.

[0011] Preferably: Each set of crawler walking parts includes a crawler body, a main drive wheel, and multiple idler wheels. The main drive wheel meshes with the crawler body, and the output end of the drive motor is connected to the corresponding main drive wheel; the beneficial effect of this preference is that the output end of the drive motor is directly connected to the main drive wheel, omitting the deceleration and transmission components, effectively simplifying the chassis structure, and the installation and maintenance are more convenient.

[0012] Preferably, a secondary battery pack and a secondary generator are also arranged on the chassis. The output end of the engine is connected to the input end of the secondary generator through a belt. The output end of the secondary generator is electrically connected to the secondary battery pack. The secondary battery pack is used to supply power to the control unit; the beneficial effect of this preference is that the power provided by the engine is directly input to the secondary generator for power generation and transmitted to the secondary battery pack for storage. The power distribution is optimized, and it is more energy-saving. The secondary battery pack is also used for vehicle electrical appliances such as starting motors, horns, lights and other components.

[0013] Preferably, the control unit includes a direction controller and a speed controller, and both the direction controller and the speed controller are electrically connected to two sets of motor controllers respectively.

[0014] Preferably, the DC output voltage of the main battery pack is 72V, and the DC output voltage of the secondary battery pack is 12V; the beneficial effect of this preference is that the DC output voltage of the main battery pack is a high voltage, which is supplied to the drive motor for power supply, and the DC output voltage of the secondary generator supplies power to low-voltage components such as instruments and lighting. They are independent of each other and complement each other. Preferably, the control unit is a magnetic angle induction controller.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. Through the function of the gearbox, the output power of the diesel engine is converted into two parts for output, which can make full use of the power of the diesel engine; among them, one of the power outputs of the diesel engine is for the operation unit, and the other is for the crawler walking unit, effectively reducing energy consumption and being more environmentally friendly.

[0017] 2. In this solution, the output end of the drive motor is directly connected to the crawler walking unit. Compared with the direct drive method of the engine, the reduction and transmission components are omitted, effectively simplifying the chassis structure and making installation and maintenance more convenient.

[0018] 3. Through the separate control of the control unit on two sets of drive motors, when steering is required, only the differential output of the two sets of drive motors needs to be controlled to achieve it. At the same time, turning around and speed adjustment can also be realized, without a mechanical direction adjustment mechanism, and the structure is simpler.

[0019] 4. By controlling the working states of the main generator, the main battery pack, the secondary generator, and the secondary battery pack through the control unit, when the operation unit needs more power, the power supply of the main generator and the secondary generator by the gearbox can be cut off, which can maximize the engine power while ensuring sufficient power supply for the operation unit. Brief Description of the Drawings

[0020] Figure 1 It is a side view schematic diagram of the hybrid power agricultural crawler walking system of the present utility model.

[0021] Figure 2 It is a front view schematic diagram of the hybrid power agricultural crawler walking system of the present utility model.

[0022] Figure 3 It is a side sectional view schematic diagram of the hybrid power agricultural crawler walking system of the present utility model.

[0023] Figure 4 It is a rear view schematic diagram of the hybrid power agricultural crawler walking system of the present utility model

[0024] Figure 5 This is a schematic diagram of the control logic of the hybrid power agricultural crawler walking system of the present utility model.

[0025] Explanation of reference numerals:

[0026] Chassis 1, crawler walking part 2, drive motor 3, motor controller 4, engine 5, gearbox 6, control part 7, main generator 8, main battery pack 9, clutch 10, input shaft 11, speed increasing output end 12, speed decreasing output end 13, universal shaft 14, crawler body 15, main drive wheel 16, idler wheel 17, auxiliary battery pack 18, auxiliary generator 19, direction controller 20, speed controller 21, generator controller 22. Specific implementation mode

[0027] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment:

[0029] As Figures 1-4 shown, a hybrid power agricultural crawler walking system includes a chassis 1, and crawler walking parts 2 are arranged on both sides of the chassis 1. Each side of the crawler walking part corresponds to a set of drive motors 3 and motor controllers 4. Each set of crawler walking parts 2 includes a crawler body 15, a main drive wheel 16, and a plurality of idler wheels 17. The crawler body 15 is wound around the main drive wheel 16 and the plurality of idler wheels 17, and the main drive wheel 16 meshes with the crawler body 15. The output end of the drive motor 3 is connected to the corresponding main drive wheel 16; specifically, there are two sets of drive motors 3 and motor controllers 4, and each set of motor controllers 4 and drive motors 3 independently drives a set of crawler walking parts 2.

[0030] During implementation, an engine 5, a gearbox 6, a control part 7, a main generator 8, working components, and a main battery pack 9 are arranged on the chassis; among them, the engine 5 is arranged at the upper end of the front part of the chassis 1, the gearbox 6 is arranged at the upper end of the rear part of the chassis 1, and the control part 7 is arranged at the upper middle part of the chassis 1; the output shaft of the engine 5 is connected with a flywheel, and the flywheel is connected to the input shaft 11 of the gearbox 6 through a clutch 10. The input shaft 11 of the gearbox 6 is connected to the upper part of the front end of the chassis 1, and a shaft sleeve is sleeved on the outside to protect the input shaft 11;

[0031] Specifically, the transmission 6 has two output ends, that is, two output shafts. One is the speed-increasing output end 12, which is a speed-increasing output shaft meshed with the input shaft 11 through gears. It increases the speed through gears to achieve speed-increasing output and is connected to the input end of the main generator 8, so as to ensure that the main generator 8 is in the optimal power generation range. The other is the speed-decreasing output end. The speed-decreasing output end 13 includes a speed-decreasing output shaft arranged in the transmission and outputs through the speed reduction and torque increase of the transmission 6. During implementation, the speed-decreasing output end 13 is connected to the working component through a universal shaft 14. The working component is determined according to the realized function. For example, the working component of a rotary tiller is a rotary tiller head and is connected through the universal shaft 14. The adjustment of the working component is more convenient and flexible, and the adaptability to the terrain is better.

[0032] During implementation, the output end of the main generator 8 is connected to the motor controller 4 and the main battery pack 9 through the generator controller 22. Among them, the generator controller 22 can supply power according to the power demand of the drive motor 3 and the demand of the main battery pack 9. The DC output of the main battery pack 9 is 72V and supplies power to the drive motor 3. During implementation, an auxiliary battery pack 18 and an auxiliary generator 19 are also installed on the chassis 1. The input end of the auxiliary generator 19 is connected to the output end of the engine 5 through a belt, and the output end of the auxiliary generator 19 is connected to the auxiliary battery pack 18. The output end of the auxiliary generator 19 is also connected to the control unit 7 and other low-voltage electrical appliances that need power supply, such as instrument panels and lighting lamps. The auxiliary battery pack 18 is also connected to the low-voltage electrical appliances and the control unit 7 through a circuit to supply power to them. Specifically, the DC output of the auxiliary battery pack is 12V.

[0033] During implementation, the control unit 7 can be a magnetic angle induction controller during implementation, specifically including a direction controller 20 and a speed controller 21. The direction controller 20 is specifically a steering wheel in this solution, and the speed controller 21 is specifically a joystick. The angular displacement output of the direction controller 20 is converted into a control signal through a magnetic induction chip built into the control unit and input into the motor controller 4. The two motor controllers 4 respectively output control signals to the corresponding drive motors 3 for differential output to achieve steering. When acceleration is required, the joystick is directly controlled, and the controller converts the angular displacement of the joystick into a control signal and outputs it to the motor controller 4 to adjust the speed of the drive motor 3.

[0034] The implementation principle of this solution is as Figure 5 :

[0035] Start the engine 5. The engine 5 transmits power to the gearbox 6 through the clutch. The gearbox 6 divides the power into two parts. One part directly drives the working components through the cardan shaft 14 for operation, and the other part supplies power to the drive motor 3 through the main generator 8 and the main battery pack 9. The main battery pack 9 can store electrical energy and supply power to the drive motor 3. The engine 5 supplies power to the low-voltage components of the equipment through the auxiliary generator 19 and the auxiliary battery pack 18. The low-voltage components can specifically include the control unit 7, instruments, and lighting appliances. When traveling, through the control unit 7, the speeds of the two groups of drive motors 3 can be controlled. When steering is required, only the two groups of drive motors 3 need to output differentially. Through the control commands of the control unit 7, functions such as in-place steering, turning around, and speed adjustment can also be achieved.

[0036] The traveling system of this solution greatly reduces the mechanical transmission design and simplifies the overall vehicle structure. Since the motor arrangement only requires connecting wires and can be placed at various positions on the chassis, the chassis layout will no longer be restricted by mechanical transmission. Currently, the mainstream crawler arrangement schemes such as parallel crawler front drive, parallel crawler rear drive, and triangular crawler drive can all be implemented on the platform, which is very flexible. This means that this solution can be applied to crawler products such as rotary tillers, harvesters, transplanters, and tractors, with strong expandability. The operation control of the entire vehicle is transformed into electrical signals, and the electronic control technology can replace the relatively costly "hydrostatic continuously variable transmission HST" to achieve functions such as stepless speed change and in-place steering.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A hybrid agricultural crawler walking system, comprising a chassis (1), with crawler walking parts (2), drive motors (3) and motor controllers (4) arranged on both sides of the chassis (1); there are two sets of drive motors (3) and motor controllers (4), and each set of motor controller (4) and drive motor (3) independently drives a set of crawler walking parts (2), characterized in that: An engine (5), a gearbox (6), a control unit (7), a main generator (8), a working component, and a main battery pack (9) are provided on the chassis. The engine (5) is arranged at the front of the chassis (1), the gearbox (6) is arranged at the rear of the chassis (1), and the control unit (7) is arranged in the upper middle part of the chassis (1). The flywheel at the output end of the engine (5) is connected to the input shaft (11) of the gearbox (6) through a clutch (10). The gearbox (6) includes a speed increasing output end (12) and a speed decreasing output end (13). The speed increasing output end (12) is connected to the input end of the main generator (8), and the output end of the main generator (8) is electrically connected to the main battery pack (9) through a generator controller (22). The main battery pack (9) is used to supply power to drive the motor (3). The speed decreasing output end (13) is connected to the working component through a universal shaft (14). The control unit (7) is electrically connected to the motor controller (4).

2. The hybrid agricultural crawler walking system according to claim 1, wherein: Each set of crawler traveling parts (2) includes a crawler body (15), a main drive wheel (16), and a plurality of idler wheels (17). The main drive wheel (16) meshes with the crawler body (15), and the output end of the drive motor (3) is connected to the corresponding main drive wheel (16).

3. The hybrid agricultural crawler walking system according to claim 1, characterized in that: A secondary battery pack (18) and a secondary generator (19) are further provided on the chassis (1). The output end of the engine (5) is connected to the input end of the secondary generator (19) through a belt. The output end of the secondary generator (19) is electrically connected to the secondary battery pack (18). The secondary battery pack (18) is used to supply power to the control unit (7).

4. The hybrid agricultural crawler walking system according to claim 3, characterized in that: The control unit (7) includes a direction controller (20) and a speed controller (21). Both the direction controller (20) and the speed controller (21) are respectively electrically connected to two groups of motor controllers.

5. The hybrid agricultural crawler walking system according to claim 3, characterized in that: The DC output voltage of the main battery pack (9) is 72V, and the DC output voltage of the secondary battery pack (18) is 12V.

6. The hybrid agricultural crawler walking system according to claim 3, characterized in that: The control unit (7) is a magnetic angle induction controller.

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