Hybrid crawler-type power chassis transmission system

Abstract

The invention discloses a hybrid crawler-type power chassis transmission system which comprises a fuel engine, a clutch, a generator, a power output assembly, a battery pack, a motor and a walking assembly, the fuel engine, the clutch, the generator and the power output assembly are sequentially connected, the battery pack, the motor and the walking assembly are sequentially connected, the battery pack is connected with the generator, and a clutch shaft of the clutch penetrates through the generator to be connected with the power output assembly. Meanwhile, power is input to the generator and the power output assembly, and the battery pack inputs power to the walking assembly through the motor. The electric vehicle is simple and compact in structure, light in weight and lower in cost, fuel economy is improved, more energy is saved, intelligent control is convenient to achieve, and the endurance problem is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power chassis, and in particular to a hybrid crawler type power chassis transmission system. Background Art

[0002] The current tractor power chassis mainly includes the engine, gearbox, front and rear axle components, etc. The transmission mechanism in the gearbox mainly adopts gear transmission. The power of the engine needs to be input into the PTO and travel system respectively through a complex gear transmission mechanism, which leads to a complex power chassis structure, large size, heavy weight and high cost.

[0003] Therefore, many units are currently developing hybrid transmission systems. For example, my country's patent CN114571992A discloses a diesel-electric hybrid power transmission for tractors, including a diesel engine, a generator and an electric motor, and is also provided with a front axle drive shaft connected to the front axle, a rear axle drive shaft connected to the rear axle, a PTO drive shaft connected to the PTO assembly, and a four-wheel drive shaft; the diesel engine drive shaft is connected to the generator, the generator can store electrical energy in the battery pack, the battery pack can power the motor, the motor can drive the rear axle in high gear and low gear, the rear axle drive shaft can drive the four-wheel drive shaft, the four-wheel drive shaft can drive the front axle drive shaft through the four-wheel drive system clutch and the spline sleeve, so that the motor can drive the front axle and the rear axle at the same time, the diesel engine drives the PTO assembly through the PTO drive shaft, and the diesel-electric hybrid power drive of the tractor is realized, the purpose of energy saving and emission reduction is achieved, the economy of the tractor is greatly improved, it has the advantages of stepless speed change and precise control, greatly improves the operating comfort and power, and has huge advantages in tractor noise control and other aspects.

[0004] However, in the prior art, the generator and the motor are external to the gearbox, and the motor drives the travel system through a complex gear transmission structure, and the gear transmission structure is still integrated in the gearbox. The power of the travel system is merely separated through the generator and the motor, and the volume, weight and structural complexity of the gearbox are not effectively reduced. The compactness of the structure of the whole machine is difficult to meet market demand. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a hybrid crawler power chassis transmission system to solve the problems of the prior art gearbox having a complex structure, large volume and weight, and high cost.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a hybrid crawler power chassis transmission system, including a fuel engine, a clutch, a generator, a power output assembly connected in sequence, and a battery pack, an electric motor and a traveling assembly connected in sequence, and the battery pack is connected to the generator, wherein the clutch shaft of the clutch passes through the generator and is connected to the power output assembly, and inputs power to the generator and the power output assembly at the same time, and the battery pack inputs power to the traveling assembly through the electric motor.

[0007] As an optimization, the generator includes a stator assembly and a rotor assembly that cooperate with each other, and the rotor assembly is coaxially mounted on the clutch shaft.

[0008] As an optimization, the generator is accommodated in a support housing, and the support housing is made integrally with the clutch housing.

[0009] As an optimization, the travel assembly includes two groups of reduction transmission components, which are respectively connected to the left travel half-shaft and the right travel half-shaft, and the electric motors are arranged in two corresponding ones, which are respectively connected to the two groups of reduction transmission components.

[0010] As an optimization, the power output assembly includes a power output driving shaft and a power output shaft, and the power output driving shaft is coaxially connected to the clutch shaft.

[0011] As an optimization, it also includes a rear axle housing, which is connected to the supporting housing. The power output assembly is installed in the rear axle housing, and one end of the power output shaft extends out of the rear axle housing.

[0012] As an optimization, a power management system is also included, wherein the generator is an excitation generator, and the power management system is connected to the generator and the battery pack. When the power management system detects that the voltage of the battery pack exceeds a set value, it can control whether the generator generates electricity by controlling the excitation signal of the generator.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The present invention embeds the generator in the clutch housing and is coaxially arranged with the clutch shaft and the power output driving shaft. Through the fuel engine, clutch, generator and power output assembly connected in sequence, the clutch shaft directly inputs power to the generator and the power output assembly. A complex gear transmission structure is no longer required, and the traditional gearbox structure is completely abandoned, which greatly simplifies the chassis structure, makes the structure more compact and lighter.

[0014] 2. The present invention provides power to the travel assembly through a generator and an electric motor, and directly inputs power to the power output assembly through a clutch shaft, thereby separating the travel from the power output assembly, improving fuel economy, being more energy-efficient, facilitating intelligent control, and effectively solving the endurance problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle of the power chassis transmission system of the present invention; Figure 2 It is a structural schematic diagram of the power chassis of the present invention; In the figure: 1. Clutch housing 2. Front support housing 3. Fan 4. Clutch shaft 5. Stator assembly 6. Rotor assembly 7. Rear support housing 8. Rear axle housing 9. Spline sleeve 10. Power output driving shaft 11. Power output driving gear 12. Power output shaft 13. Engagement sleeve 14. Engagement seat 15. Power output driven gear 16. Reduction transmission assembly 17. Travel right half shaft 18. Travel left half shaft 19 - Power output assembly. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Example: See Figure 1-Figure 2 A hybrid crawler power chassis transmission system includes a fuel engine, a generator and a power output assembly 19 connected in sequence, and a battery pack, an electric motor and a travel assembly connected in sequence, wherein the battery pack is connected to the generator, wherein the clutch shaft 4 of the clutch passes through the generator and is connected to the power output assembly 19, and inputs power to the generator and the power output assembly 19 at the same time, and the battery pack inputs power to the travel assembly through the electric motor. Specifically, the generator includes a stator assembly 5 and a rotor assembly 6 that match each other, and the rotor assembly 6 is coaxially mounted on the clutch shaft 4. In this embodiment, the driving shaft of the clutch is connected to the output shaft of the fuel engine in a transmission manner, and its driven shaft, that is, the clutch shaft 4 (equivalent to the I shaft of a traditional tractor) directly passes through the generator and is connected to the power output assembly 19 through a spline sleeve 9, and the on / off of the power transmission can be controlled by the clutch, so that the structure is simpler and more compact, and the clutch shaft 4 as a whole and a part of the generator is convenient for positioning and assembly of other components of the generator.

[0020] In the present invention, the fuel engine, the generator and the power output assembly 19 are connected in sequence, and the clutch shaft 4 directly inputs power to the generator and the power output assembly 19. A complex gear transmission structure is no longer required, and the traditional gearbox structure is completely abandoned, which greatly simplifies the chassis structure, makes the structure more compact, lighter, and easier to assemble.

[0021] More specifically, the generator is accommodated in a support housing, and the support housing is made integrally with the clutch housing 1. The support housing can be formed by extending the clutch housing 1 in the direction away from the fuel engine, and has an installation cavity inside. The two ends of the generator have a front support housing 2 and a rear support housing 7 to fix the generator in the support housing. A stator assembly 5 is provided between the front support housing 2 and the rear support housing 7, and the rotor assembly 6 on the clutch shaft 4 cooperates with the stator assembly 5 to achieve power generation. In addition, a fan 3 is also provided on the clutch shaft 4. At the same time, a heat dissipation hole is also provided on the side of the front support housing 2 close to the clutch to ensure the heat dissipation of the generator, and a heat dissipation hole can also be provided on the clutch housing to ensure that the heat can be dissipated in time.

[0022] The power output assembly 19 includes a power output driving shaft 10 and a power output shaft 12, and the power output driving shaft 10 is coaxially connected with the clutch shaft 4. In this embodiment, a rear axle housing 8 is also included for connecting the travel assembly. The rear axle housing 8 is connected to the support housing, and the power output assembly 19 is installed in the rear axle housing 8, and one end of the power output shaft 12 extends out of the rear axle housing 8. Specifically, the clutch shaft 4 is coaxially connected with the power output driving shaft 10 located in the rear axle housing 8 through a spline sleeve 9, and a plurality of power output driving gears 11 are provided on the power output driving shaft 10, the power output shaft 12 is parallel to the power output driving shaft 10, and a plurality of power output driven gears 15 meshing with the power output driving gears 11 are provided on the power output shaft 12, and an engagement seat 14 and an engagement sleeve 13 are also provided on the power output shaft 12 to achieve gear switching.

[0023] In addition, the present invention provides power for the travel assembly through a generator and an electric motor, and the power is directly input into the power output assembly 19 through the clutch shaft 4, thereby separating the travel from the power output assembly 19 (PTO), improving fuel economy, being more energy-efficient, facilitating intelligent control, and effectively solving the endurance problem.

[0024] Specifically, the travel assembly includes two groups of reduction transmission components 16 on the left and right sides, which are respectively connected to the travel left half shaft 18 and the travel right half shaft 17 in transmission. The motors are provided in two corresponding groups, which are respectively connected to the two groups of reduction transmission components 16 in transmission. In this way, the left and right travel assemblies are respectively controlled by the motors, which is convenient for adjustment and intelligent control, and flexible steering control is realized. In addition, the motor technology is mature, the control system is simple, easy to adjust, and the cost is low, thereby greatly reducing the cost of the whole machine.

[0025] In addition, it also includes a power management system. Specifically, the power management system includes functional modules such as rectification, voltage monitoring and conversion, battery charging and discharging, overload and overheat protection, etc. The generator is an excitation generator. By switching on and off the excitation current in the rotor or stator component 5, the power generation state of the generator can be conveniently controlled. The specific principle of the excitation generator and the required excitation components, the realization of various functions of the power management system, etc. are all existing technologies and will not be described in detail. The power management system is connected to the battery pack and the generator, and is used to control whether the generator generates electricity by controlling the excitation signal of the generator when the power management system detects that the voltage of the battery pack exceeds the set value.

[0026] Specifically, the power management system controls whether the generator generates electricity based on the battery pack voltage: when the battery pack voltage is lower than the set lower limit, the generator generates electricity to charge the battery pack; when the battery pack voltage reaches the set upper limit, the generator no longer generates electricity, and the generator rotor assembly rotates at no load, saving fuel consumption, greatly improving fuel economy and endurance, and being more energy-efficient.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A hybrid crawler power chassis transmission system, characterized in that: It includes a fuel engine, a clutch, a generator, a power output assembly connected in sequence, and a battery pack, an electric motor and a traveling assembly connected in sequence, wherein the battery pack is connected to the generator, wherein the clutch shaft of the clutch passes through the generator and is connected to the power output assembly, and inputs power to the generator and the power output assembly at the same time, and the battery pack inputs power to the traveling assembly through the electric motor.

2. A hybrid crawler power chassis transmission system according to claim 1, characterized in that: The generator includes a stator assembly and a rotor assembly that cooperate with each other. The rotor assembly is coaxially mounted on the clutch shaft.

3. A hybrid crawler power chassis transmission system according to claim 1 or 2, characterized in that: The generator is accommodated in a supporting housing, and the supporting housing is integrally formed with a clutch housing.

4. The hybrid crawler power chassis transmission system according to claim 3, characterized in that: The travel assembly includes two groups of reduction transmission components, which are respectively connected to the left travel half shaft and the right travel half shaft. The motors are arranged in two corresponding groups and are respectively connected to the two groups of reduction transmission components.

5. The hybrid crawler power chassis transmission system according to claim 3, characterized in that: The power output assembly comprises a power output driving shaft and a power output shaft, and the power output driving shaft is coaxially connected with the clutch shaft.

6. The hybrid crawler power chassis transmission system according to claim 3, characterized in that: It also includes a rear axle housing, which is connected to the supporting housing. The power output assembly is installed in the rear axle housing, and one end of the power output shaft extends out of the rear axle housing.

7. The hybrid crawler power chassis transmission system according to claim 1, characterized in that: It also includes a power management system, in which the generator is an excitation generator, and the power management system is connected to the generator and the battery pack. When the power management system detects that the voltage of the battery pack exceeds a set value, it can control whether the generator generates electricity by controlling the excitation signal of the generator.

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