WO2024045568A1 - Ensemble d'entraînement, procédé de changement de vitesse pour ensemble d'entraînement, système d'alimentation et machine d'exploitation - Google Patents

Ensemble d'entraînement, procédé de changement de vitesse pour ensemble d'entraînement, système d'alimentation et machine d'exploitation Download PDF

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Publication number
WO2024045568A1
WO2024045568A1 PCT/CN2023/082463 CN2023082463W WO2024045568A1 WO 2024045568 A1 WO2024045568 A1 WO 2024045568A1 CN 2023082463 W CN2023082463 W CN 2023082463W WO 2024045568 A1 WO2024045568 A1 WO 2024045568A1
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WO
WIPO (PCT)
Prior art keywords
gear
transmission
motor
component
traction force
Prior art date
Application number
PCT/CN2023/082463
Other languages
English (en)
Chinese (zh)
Inventor
李福文
高鹏飞
赵腾飞
李惠军
吴有钢
王培林
孔凡洁
Original Assignee
湖州三一装载机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 湖州三一装载机有限公司 filed Critical 湖州三一装载机有限公司
Publication of WO2024045568A1 publication Critical patent/WO2024045568A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/42—Ratio indicator devices

Definitions

  • the present disclosure relates to the technical field of working machinery, and in particular to a drive assembly, a gear shifting method of the driving assembly, a power system and a working machine.
  • the transmission system is an important part of the working machinery.
  • the main task of the transmission system is to use the power from the drive motor through the meshing gear transmission to drive the working machinery to move and work through the transmission shaft, axle, tires and other components.
  • the low gear has a large speed ratio and can provide sufficient traction, but the vehicle speed is low; while the high gear speed meets the requirements for long-distance driving, but the traction is too small. Therefore, when traditional operating machinery is working, it adopts a high gear before arriving at the working site to ensure a high speed and improve efficiency; but when arriving at the working site, it needs to shift to a low gear so that the operating machinery can obtain sufficient traction to ensure the progress of the operation.
  • the present disclosure provides a drive assembly, a gear shifting method of the drive assembly, a power system and a working machine.
  • a drive assembly including:
  • a gearbox including a first input component, a second input component and an output component, the output component being used for transmission connection with the output shaft;
  • Detection component used to detect the traction force and speed of working machinery
  • a controller communicatively connected with the shifting mechanism and the detection component
  • the first input component includes a first gear and a second gear coaxially rotating with the first gear
  • the second input assembly includes a third gear and a fourth gear coaxially rotating with the third gear;
  • the first gear and the third gear mesh to form a first gear, and the second gear and the fourth gear mesh to form a second gear;
  • the controller controls the shifting mechanism to drive the output component to switch between transmission connection with the first gear and transmission connection with the second gear according to the detection signal of the detection component.
  • a drive assembly provided according to the present disclosure also includes:
  • a power device is drivingly connected to both the first input component and the second input component.
  • the power device includes a first motor and a second motor, the first motor is drivingly connected to the first input component, and the second motor is connected to the second input component.
  • the components are transmission connected; wherein, the first motor and the second motor are both communicatively connected with the controller, and the controller can detect the components according to the detection component.
  • the measured signal controls the opening and closing of the first motor and the second motor;
  • the power device includes a drive motor, and the drive motor is drivingly connected to both the first input component and the second input component.
  • the first input component further includes:
  • a first transmission shaft, the first gear and the second gear are both fixedly arranged on the first transmission shaft, and the first transmission shaft is transmission connected with the first motor or the driving motor;
  • the second input component also includes:
  • the second transmission shaft, the third gear and the fourth gear are both fixedly arranged on the second transmission shaft, and the second transmission shaft is transmission connected with the second motor or the driving motor.
  • the output component includes:
  • An output gear is provided on the third transmission shaft, and the output gear is used for transmission connection with the output shaft;
  • a sliding sleeve is slidably disposed on the third transmission shaft, and the shifting mechanism can drive the sliding sleeve to switch between a transmission connection with the first gear and a transmission connection with the second gear.
  • the first gear further includes a first transmission gear, the first gear and the third gear mesh through the first transmission gear, and the sliding sleeve can be The first transmission gear transmission connection, wherein,
  • the first transmission gear is rotatably arranged on the third transmission shaft;
  • the first transmission gear is drivingly connected to the driving motor.
  • the second gear further includes a second transmission gear, the second gear and the fourth gear mesh through the second transmission gear, the sliding sleeve can be transmission connected with the second transmission gear, and the second transmission gear is rotatably arranged on the first transmission gear. on the third drive shaft.
  • PTO power take-off installation interfaces are provided on both the first transmission shaft and the second transmission shaft.
  • a gear shifting method of a drive assembly including:
  • the detection component When the detection component detects that the traction force of the working machine is greater than or equal to the preset traction force, it controls the shifting mechanism to drive the output component to be transmission connected to the first gear, so that the output component is engaged in the first gear;
  • the shift mechanism is controlled to drive the output component and
  • the first gear transmission connection allows the output assembly to be engaged in the first gear
  • the shift mechanism is controlled to drive the The output component is transmission connected with the second gear, so that the output component is engaged in the second gear.
  • a method for shifting a drive assembly according to the present disclosure further includes:
  • the detection component When the detection component detects that the traction force of the working machine is greater than or equal to the preset traction force, it controls both the first motor and the second motor to start to provide power to the gearbox at the same time;
  • the first motor is controlled to start, and the first motor is controlled to start.
  • the second motor is turned off;
  • the detection component detects that the traction force of the working machine is less than the preset traction force and the detection component detects that the vehicle speed of the working machine is greater than or equal to the preset
  • the first motor is controlled to be turned off and the second motor is started.
  • a power system including the drive assembly as described in any one of the above.
  • a working machine including the drive assembly as described in any one of the above or the power system as described above.
  • the controller determines the appropriate target gear through the detection signal of the detection component, and controls the shifting mechanism to drive the output component and the appropriate target.
  • the gear transmission connection allows the work machine to automatically shift to the appropriate gear.
  • Figure 1 is a schematic structural diagram of a drive assembly according to an embodiment of the present disclosure (the power device includes two motors);
  • Figure 2 is a schematic structural diagram of a drive assembly according to an embodiment of the present disclosure (the power device includes a motor).
  • the present disclosure provides a drive assembly, including a gearbox, a shifting mechanism 5, a detection component, and a controller 4.
  • the gearbox includes a first input component, a second input component and an output component, and the output component is used for transmission connection with the output shaft 19.
  • the output shaft 19 is connected with the drive axle, so that the gearbox can transmit power to the drive. bridge.
  • the first input component may include a first gear 6 and a second gear 7, and the second gear 7 rotates coaxially with the first gear 6;
  • the second input component may include a third gear 8 and a fourth gear 9, the fourth gear being 9 and the third gear 8 rotate coaxially, wherein the first gear 6 and the third gear 8 mesh to form the first gear, and the second gear 7 and the fourth gear 9 mesh to form the second gear.
  • the shifting mechanism 5 and the detection component are both communicatively connected with the controller 4, and the detection component is used to detect the traction force and vehicle speed of the working machine.
  • the controller 4 controls the driving output component of the shifting mechanism 5 according to the detection signal of the detection component. Switching between the first gear transmission connection and the second gear transmission connection.
  • the controller 4 determines the appropriate target gear through the detection signal of the detection component, and controls the shift mechanism 5 to drive the output assembly to be transmission connected to the appropriate target gear, so that the working machine can automatically shift to the appropriate gear.
  • the driver does not need to frequently shift gears between low gear and high gear, which reduces the driver's labor intensity and improves work efficiency. operating efficiency; and, by realizing two gears through the first input component and the second input component, the bending moment can be balanced, making the rotation of the output shaft 19 more stable, improving the reliability of the gearbox, and making the rotation of the output component more stable.
  • the drive assembly has a simple structure and is easy to maintain and service.
  • the detection component may include a traction force detection element and a rotation speed detection element.
  • the traction force detection element is used to detect the traction force of the working machine
  • the rotation speed detection element is used to detect the vehicle speed of the working machine.
  • the traction force detection element can be The load cell and the rotational speed detection element can be a rotational speed sensor, and the rotational speed sensor can detect the rotational speed of the output component to obtain the vehicle speed of the working machine.
  • the controller 4 controls the shift mechanism 5 to drive the output component to be transmission connected to the first gear, so that the output component is engaged in the first gear;
  • the controller 4 controls the shift mechanism 5 to drive the output assembly and connect it to the first gear transmission, so that The output assembly is engaged in the first gear;
  • the controller 4 controls the shift mechanism 5 to drive the output assembly and connect it to the second gear transmission , put the output assembly into the second gear.
  • gears can be automatically switched according to different loads and speeds of the working machinery, thereby giving full play to the driving capability of the drive assembly.
  • the controller 4 may be a transmission controller TCU.
  • the controller 4 includes a comparison module, a storage module and a control module.
  • the storage module stores the preset traction force and the preset vehicle speed.
  • the comparison module compares the detection signals of the traction force detection element and the rotation speed detection element received by the controller 4 with the preset traction force. Compare with the preset speed respectively, and The result is output to the control module, and the control module controls the shifting mechanism 5 to switch the output assembly between transmission connection with the first gear and transmission connection with the second gear.
  • the drive assembly may further include a power device, and the power device is drivingly connected to both the first input component and the second input component to provide power to the first input component and the second input component.
  • the power device may include a first motor 1 and a second motor 2.
  • the first motor 1 is drivingly connected to the first input component to provide power to the first input component
  • the second motor 2 is drivingly connected to the second input component to provide power for the second input component
  • both the first motor 1 and the second motor 2 are communicatively connected to the controller 4.
  • the controller 4 can control according to the detection signal of the detection component. Turning on and off the first motor 1 and the second motor 2.
  • the controller 4 controls both the first motor 1 and the second motor 2 to start to provide power to the gearbox through the two motors at the same time;
  • the controller 4 controls the first motor 1 to start and the second motor 2 to turn off;
  • the controller 4 controls the first motor 1 to turn off and the second motor 2 to start.
  • the opening and closing of the first motor 1 and the second motor 2 can be automatically controlled according to different loads and vehicle speeds of the working machine.
  • first motor 1 and the second motor 2 can be arranged on the same side or on opposite sides of the gearbox, and the installation positions of the first motor 1 and the second motor 2 can be determined according to actual needs.
  • the preset traction force may be 70% of the maximum traction force of the working machine (70%Fmax), the preset vehicle speed can be 30% of the maximum vehicle speed of the work machine (30%Vmax).
  • the controller 4 controls both the first motor 1 and the second motor 2 to start to provide power to the gearbox through the two motors at the same time and control the gear shifting.
  • Mechanism 5 drives the output component to be connected to the first gear, so that the output component is put into the first gear;
  • the controller 4 controls the first motor 1 to start, the second motor 2 to turn off, and controls the gear shift.
  • Mechanism 5 drives the output component to be connected to the first gear, so that the output component is put into the first gear;
  • the controller 4 controls the first motor 1 to turn off, the second motor 2 to start, and controls The shifting mechanism 5 drives the output assembly to be transmission-connected to the second gear, so that the output assembly is engaged in the second gear.
  • the power device may include a drive motor 3, which is drivingly connected to both the first input component and the second input component to provide power for the first input component and the second input component.
  • Input components provide power.
  • the first input assembly may also include a first transmission shaft 10 , the first gear 6 and the second gear 7 are both fixedly provided on the first transmission shaft 10 , and the first transmission shaft 10 is connected to the first transmission shaft 10 .
  • the motor 1 or the driving motor 3 is connected in a transmission manner, so that the first motor 1 or the driving motor 3 drives the first gear 6 and the second gear 7 to rotate.
  • the second input component may also include a second transmission shaft 11 , the third gear 8 and the fourth gear 9 are both fixedly arranged on the second transmission shaft 11 , and the second transmission shaft 11 is transmission connected with the second motor 2 or the drive motor 3 , so that the second motor 2 or the driving motor 3 drives the third gear 8 and the fourth gear 9 to rotate.
  • the output assembly may include a third drive shaft 13,
  • the output gear 12 and the sliding sleeve 14 are fixedly arranged on the third transmission shaft 13 .
  • the output gear 12 is used for transmission connection with the output shaft 19 so as to transmit the power of the third transmission shaft 13 to the output shaft 19 .
  • the sliding sleeve 14 is slidably disposed on the third transmission shaft 13, and the sliding sleeve 14 can rotate synchronously with the third transmission shaft 13.
  • the shifting mechanism 5 can drive the sliding sleeve 14 to be in transmission connection with the first gear and with the second gear.
  • the shift mechanism 5 is transmission connected with the first gear 6 and the third gear 8 or with the second gear 7 and the fourth gear 9 through the driving sliding sleeve 14, so as to realize the transmission connection between the third transmission shaft 13 and the third gear 9.
  • the first gear or the second gear is transmission connected so that the output shaft 19 can switch between the first gear and the second gear.
  • the first gear may also include a first transmission gear 15 , the first gear 6 and the third gear 8 mesh through the first transmission gear 15 , and the sliding sleeve 14 can be transmission connected with the first transmission gear 15 , so that the output shaft 19 can be put into the first gear.
  • the first transmission gear 15 is rotatably disposed on the third transmission shaft 13 .
  • the first transmission gear 15 may be rotationally connected to the third transmission shaft 13 through a bearing.
  • the first transmission gear 15 can be transmission connected with the drive motor 3 , and the drive motor 3 is connected with the first gear 6 and the third gear 8 through the first transmission gear 15 .
  • the first transmission gear 15 is transmission connected to the driving motor 3 through the connecting shaft 21.
  • the first transmission gear 15 is fixedly connected to the connecting shaft 21.
  • the driving motor 3 drives the connecting shaft 21 to rotate, driving the first transmission gear 15 to rotate, thereby driving the The first gear 6 and the third gear 8 rotate to realize the rotation of the first transmission shaft 10 and the second transmission shaft 11 .
  • connecting shaft 21 and the third transmission shaft 13 may be coaxially arranged, and the connecting shaft 21 and the third transmission shaft 13 are not connected.
  • the second gear may also include a second transmission gear 16 through which the second gear 7 and the fourth gear 9 mesh, and the sliding sleeve 14 can It is transmission connected with the second transmission gear 16 so that the output shaft 19 can be engaged in the second gear.
  • the second transmission gear 16 is rotatably arranged on the third rotation axis, so that it is convenient to switch gears.
  • the output assembly may further include at least one intermediate gear, which is used to drively connect the output gear 12 and the output shaft 19 .
  • the output assembly may include two intermediate gears, namely a first intermediate gear 17 and a second intermediate gear 18.
  • the first intermediate gear 17 meshes with the output gear 12, and the output assembly may further include a transition shaft 23,
  • the transition shaft 23 is rotationally connected to the box body of the gearbox, and the first intermediate gear 17 is arranged on the transition shaft 23;
  • the second intermediate gear 18 meshes with the first intermediate gear 17, and the second intermediate gear 18 is arranged on the output shaft 19, To be able to drive the output shaft 19 to rotate.
  • one end of the output shaft 19 is provided with an output flange 20, and the other end is provided with a manual brake 22.
  • the first transmission shaft 10 and the second transmission shaft 11 are arranged symmetrically with respect to the third transmission shaft 13, so that the third transmission shaft 13 can be evenly stressed and the transmission efficiency is high.
  • the shifting mechanism 5 may include a worm gear mechanism and a shift motor.
  • the worm gear of the worm gear mechanism is drivingly connected to the shift motor.
  • the shift motor drives the worm gear to rotate so that the worm drives the sliding sleeve 14
  • the shift fork moves, so that the sliding sleeve 14 slides on the third transmission shaft 13 to be transmission connected with the first gear or the second gear.
  • the sliding sleeve 14 is provided with a shift fork, and the shift fork is connected to the worm of the worm gear mechanism.
  • the shift motor is communicatively connected to the controller 4, and the controller 4 can control the shift motor according to the detection signal of the detection component to drive the sliding sleeve 14 to move.
  • both the first transmission shaft 10 and the second transmission shaft 11 may be provided with PTO power take-off installation interfaces. In this way, power can be output to equipment other than work machines.
  • the PTO power take-off is the power output device, which converts the power of the engine or the power of the motor A device that outputs power to equipment other than work machinery.
  • the gear shifting method of the drive assembly provided by the present disclosure will be described below.
  • the gear shifting method of the drive assembly described below and the drive assembly described above may be mutually referenced.
  • the present disclosure provides a gear shifting method for a drive assembly, including:
  • the controller 4 controls the shift mechanism 5 to drive the output component to be connected to the first gear transmission, so that the output component is put into the first gear;
  • the controller 4 controls the shift mechanism 5 to drive the output component and connect it to the first gear transmission, so that the output component Shift into first gear;
  • the controller 4 controls the shift mechanism 5 to drive the output component and connect it to the second gear transmission, so that The output assembly is engaged in second gear.
  • the gear shifting method of the drive assembly may also include:
  • the controller 4 controls both the first motor 1 and the second motor 2 to start to provide power to the gearbox through the two motors at the same time;
  • the controller 4 controls the first motor 1 to start and the second motor 2 to turn off;
  • the controller 4 controls the first motor 1 to turn off and the second motor 2 to start.
  • the opening and closing of the first motor 1 and the second motor 2 can be automatically controlled according to different loads and vehicle speeds of the working machine.
  • the power system provided by the present disclosure is described below.
  • the power system described below is related to The drive assemblies described above may be referenced to each other.
  • the present disclosure provides a power system, including the drive assembly as described in any of the above embodiments.
  • the beneficial effects achieved by the power system provided by the present disclosure are consistent with the beneficial effects achieved by the drive assembly provided by the present disclosure.
  • the controller 4 determines the appropriate target gear through the detection signal of the detection component, and controls the shifting mechanism 5
  • the drive output component is connected to the appropriate target gear transmission, so that the working machine can automatically shift to the appropriate gear.
  • the driver does not need to frequently shift gears between low gear and high gear, which reduces the driver's workload.
  • Reduce labor intensity and improve work efficiency; and, realizing two gears through the first input component and the second input component can improve the reliability of the gearbox and make the output component rotate more stably, thus improving the stability of the power system.
  • the present disclosure provides a working machine, including the drive assembly or power system as described in any of the above embodiments.
  • operating machinery may be a loader, an excavator, or other construction machinery.
  • the device embodiments described above are only illustrative.
  • the units described as separate components may or may not be physically separated.
  • the components shown as units may or may not be physical units, that is, they may be located in One location, or it can be distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Persons of ordinary skill in the art can understand and implement the method without any creative effort.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

Ensemble d'entraînement, comprenant une boîte de vitesses, un mécanisme de changement de vitesse (5), un ensemble de détection et un dispositif de commande (4), la boîte de vitesses comprenant un premier ensemble d'entrée, un second ensemble d'entrée et un ensemble de sortie, l'ensemble de sortie étant en liaison de transmission avec un arbre de sortie (19) ; l'ensemble de détection détecte la force de traction et la vitesse d'une machine d'exploitation ; le dispositif de commande est en liaison de communication avec le mécanisme de changement de vitesse et l'ensemble de détection ; le premier ensemble d'entrée comprend un premier engrenage denté (6) et un deuxième engrenage denté (7) ; le second ensemble d'entrée comprend un troisième engrenage denté (8) et un quatrième engrenage denté (9) ; le premier engrenage denté et le troisième engrenage denté sont mis en prise pour former une première vitesse ; le deuxième engrenage denté et le quatrième engrenage denté sont mis en prise pour former une seconde vitesse ; et, en fonction d'un signal de détection de l'ensemble de détection, un dispositif de commande commande le mécanisme de changement de vitesse pour entraîner la commutation de l'ensemble de sortie entre la liaison de transmission avec la première vitesse et la liaison de transmission avec la deuxième vitesse. Sont en outre divulgués un procédé de changement de vitesse pour l'ensemble d'entraînement, un système d'alimentation et une machine d'exploitation.
PCT/CN2023/082463 2022-08-31 2023-03-20 Ensemble d'entraînement, procédé de changement de vitesse pour ensemble d'entraînement, système d'alimentation et machine d'exploitation WO2024045568A1 (fr)

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CN202211066526.0 2022-08-31
CN202211066526.0A CN115596818A (zh) 2022-08-31 2022-08-31 驱动总成、驱动总成的换挡方法、动力系统及作业机械

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WO2024045568A1 true WO2024045568A1 (fr) 2024-03-07

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CN115596818A (zh) * 2022-08-31 2023-01-13 上海三一重机股份有限公司（Cn） 驱动总成、驱动总成的换挡方法、动力系统及作业机械

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