Wheel excavator and automatic gear shifting control system and control method thereof

Abstract

The invention discloses a wheel excavator and an automatic gear shifting control system and method thereof, and belongs to the technical field of excavators, the system comprises a first detection device, a second detection device, a third detection device and an automatic gear shifting control, the first detection device is used for detecting the brake pressure of the wheel excavator; the second detection equipment is used for detecting the walking pressure of the wheel excavator; the third detection equipment is connected with the output end of the gearbox of the wheel excavator and used for detecting the real-time rotating speed of the gearbox of the wheel excavator; the automatic gear shifting control is electrically connected with a controller on the wheel type excavator and used for controlling the gear shifting of the wheel type excavator according to the brake pressure, detected by the first detection device, of the wheel type excavator, the walking pressure, detected by the second detection device, of the wheel type excavator and the real-time rotating speed, detected by the third detection device, of a gearbox of the wheel type excavator. And the wheel excavator is automatically parked and the gear of the gearbox is automatically switched through an automatic control algorithm under the action of the controller.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to a wheeled excavator and an automatic gear shifting control system and a control method thereof. Background Art

[0002] As a wheeled walking machine, wheeled excavators have high requirements for the performance of walking conditions. At present, wheeled excavators mainly use hydraulic motors to drive the gearbox, which then drives the front and rear axles through the transmission shaft, and then transmits power to the tires. By adjusting the shift lever on the steering column, the gear ratio of the gearbox is switched to achieve the shifting operation.

[0003] When parking, you need to press the parking button to cut off the power to the shift control valve and lock the gearbox to avoid rolling down the slope; when driving, you need to adjust the shift lever to control the shift control valve to switch the gear of the gearbox to adapt to different vehicle speeds and road conditions. Especially when the road conditions are changeable, it will increase the burden on the driver and easily distract the attention. There are certain dangers in the operation of wheeled excavators, especially in the shifting process, there will be a certain shifting time, and the excavator is still in operation during the shifting process. Improper operation or untimely operation will cause damage to the excavator and surrounding facilities, and even injuries to personnel. Summary of the invention

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a wheeled excavator and its automatic gear shifting control system and control method, which can realize automatic gear shifting of the wheeled excavator, reduce gear shifting time, ensure gear shifting accuracy, and improve the safety of wheeled excavator operation.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides an automatic gear shift control system for a wheeled excavator, comprising:

[0007] a first detection device, the first detection device being connected to a brake pedal valve on the wheeled excavator, for detecting a brake pressure of the wheeled excavator, and transmitting the detected brake pressure to a controller of the wheeled excavator;

[0008] a second detection device, the second detection device being connected to a travel foot valve on the wheeled excavator, for detecting a travel pressure of the wheeled excavator, and transmitting the detected travel pressure to a controller of the wheeled excavator;

[0009] a third detection device, the third detection device being connected to an output end of the gearbox of the wheel excavator, and being used for detecting a real-time rotation speed of the gearbox of the wheel excavator, and transmitting the detected real-time rotation speed of the gearbox to a controller of the wheel excavator;

[0010] An automatic shift control, wherein the automatic shift control is arranged in the cab of the wheeled excavator, and the automatic shift control is electrically connected to the controller on the wheeled excavator, and the automatic shift control is used to automatically park the wheeled excavator and automatically switch the gear of the gearbox under the action of the controller through an automatic control algorithm according to the braking pressure of the wheeled excavator detected by the first detection device, the walking pressure of the wheeled excavator detected by the second detection device, and the real-time speed of the gearbox of the wheeled excavator detected by the third detection device, wherein the automatic control algorithm is pre-transmitted from the outside and stored in the controller of the wheeled excavator, or the automatic control algorithm is pre-input into the storage device of the wheeled excavator, and the controller of the wheeled excavator calls the stored automatic control algorithm when the gear of the wheeled excavator is automatically switched.

[0011] Furthermore, in the above-mentioned automatic gear shifting control system for a wheeled excavator, the first detection device includes one or more of a brake pressure sensor, a strain gauge pressure sensor, a pressure sensor or a pressure strain gauge.

[0012] Furthermore, in the above-mentioned automatic gear shifting control system for a wheeled excavator, the second detection device includes one or more of a travel pressure sensor, a strain gauge pressure sensor, a pressure sensor or a pressure strain gauge.

[0013] Furthermore, in the above-mentioned automatic gear shifting control system for a wheeled excavator, the third detection device includes a rotation speed sensor.

[0014] Furthermore, in the above-mentioned automatic shift control system for a wheeled excavator, an indicator light is provided on the operating panel of the wheeled excavator, and the indicator light is used to automatically light up when the automatic shift control performs automatic parking of the wheeled excavator and automatic switching of the gearbox gear.

[0015] Furthermore, in the above-mentioned automatic gear shift control system for a wheeled excavator, the automatic gear shift control comprises one or more of a button, a knob, a touch key, a key and a push rod.

[0016] In a second aspect, the present invention provides a wheeled excavator, on which the above-mentioned automatic gear shifting control system for the wheeled excavator is provided.

[0017] In a third aspect, the present invention provides an automatic gear shift control method for a wheeled excavator, comprising:

[0018] Detecting the brake pressure and travel pressure of the wheeled excavator to obtain the brake pressure data and travel pressure data of the wheeled excavator;

[0019] Detecting the real-time speed of the gearbox of the wheel excavator to obtain the real-time speed data of the gearbox of the wheel excavator;

[0020] According to the obtained brake pressure data, travel pressure data and real-time speed data of the gearbox of the wheeled excavator, the wheeled excavator is automatically parked and the gearbox gear is automatically switched through an automatic control algorithm.

[0021] The main advantages of the technical solution of the present invention are as follows:

[0022] An automatic gear shifting control system for a wheeled excavator of the present invention can realize automatic gear shifting of the wheeled excavator by automatically parking the wheeled excavator and automatically switching the gear positions of the transmission through an automatic control algorithm, thereby reducing gear shifting time, ensuring gear shifting accuracy, improving the safety of the operation of the wheeled excavator, reducing the driving burden of the driver, and improving the automation level of the wheeled excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic structural diagram of an automatic gear shift control system for a wheeled excavator according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of automatic switching between first and second gears in an automatic gear shift control system for a wheeled excavator provided by one embodiment of the present invention;

[0026] Figure 3 A schematic diagram of an automatic parking control system in an automatic gear shift control system for a wheeled excavator provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of releasing automatic parking, starting and driving at low speed in an automatic shift control system for a wheeled excavator provided by one embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the high-speed driving principle of an automatic gear shift control system for a wheeled excavator provided by one embodiment of the present invention;

[0029] Figure 6 A schematic flow chart of an automatic gear shifting control method for a wheeled excavator provided in one embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1. Shift lever; 2. Shift control valve; 3. Gearbox; 4. Travel motor; 5. Third detection device; 6. Center rotary body; 7. Pilot valve group; 8. Pilot relief valve; 9. Hydraulic oil tank; 10. Pilot pump; 11. Main pump; 12. Engine; 13. Main valve; 14. Second detection device; 15. First detection device; 16. Travel foot valve; 17. Brake foot valve; 18. Brake oil source; 19. Park button; 20. Automatic shift control; 21. Controller. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The following is combined with Figure 1-6 , describes in detail the technical solution provided by the embodiments of the present invention.

[0034] As attached Figure 1 As shown, an embodiment of the present invention provides an automatic gear shift control system for a wheeled excavator, the system comprising: a first detection device 15, a second detection device 14, a third detection device 5 and an automatic gear shift control 20, wherein:

[0035] The first detection device 15 is connected to the brake pedal valve 17 on the wheeled excavator, and is used to detect the brake pressure of the wheeled excavator, and transmit the detected brake pressure to the controller 21 of the wheeled excavator; the second detection device 14 is connected to the travel pedal valve 16 on the wheeled excavator, and is used to detect the travel pressure of the wheeled excavator, and transmit the detected travel pressure to the controller 21 of the wheeled excavator; the third detection device 5 is connected to the output end of the gearbox 3 of the wheeled excavator, and is used to detect the real-time speed of the gearbox 3 of the wheeled excavator, and transmit the detected real-time speed of the gearbox 3 to the controller 21 of the wheeled excavator. The automatic shift control 20 is arranged in the cab of the wheeled excavator, and the automatic shift control 20 is electrically connected to the controller 21 on the wheeled excavator. The automatic shift control 20 is used to automatically park the wheeled excavator and automatically switch the gears of the gearbox 3 under the action of the controller 21 through an automatic control algorithm according to the braking pressure of the wheeled excavator detected by the first detection device 15, the walking pressure of the wheeled excavator detected by the second detection device 14, and the real-time speed of the gearbox 3 of the wheeled excavator detected by the third detection device 5.

[0036] Specifically, the wheeled excavator in the present invention brakes by hydraulic braking, and the braking pressure comes from the outlet of the brake pedal valve. The braking pressure is the pressure signal of the brake pedal valve. It can be understood that the deeper the brake is stepped on, the greater the pressure, the greater the braking force, and the faster the deceleration. By collecting the pressure and accessing the control system, a corresponding series of logical controls can be performed. In some optional implementations of this embodiment, the braking pressure is detected by a hydraulic pressure sensor, and the size of the braking pressure can determine whether the driver has stepped on the brake and the depth of the step. The walking pressure comes from the outlet of the walking pedal valve. It can be understood that when the wheeled excavator is walking, the deeper the walking pedal is stepped on, the greater the pressure, the faster the acceleration, and the higher the driving speed. The signal is collected in the present invention to monitor the state of the vehicle and whether it is walking.

[0037] Specifically, the above-mentioned automatic control algorithm is pre-transmitted from the outside and stored in the controller 21 of the wheeled excavator, or the automatic control algorithm is pre-input into the storage device of the wheeled excavator, and the controller 21 of the wheeled excavator calls the stored automatic control algorithm when the gear position of the wheeled excavator is automatically switched.

[0038] As an example, the speed of a wheeled excavator is calculated in the following manner: the gearbox speed of the wheeled excavator is transmitted to the axle, multiplied by a certain reduction ratio to obtain the wheel speed, and the wheel speed is multiplied by the wheel circumference to obtain the driving speed.

[0039] Therefore, an automatic gear shifting control system for a wheeled excavator of the present invention can realize automatic gear shifting of the wheeled excavator, reduce gear shifting time, ensure gear shifting accuracy, improve the safety of the operation of the wheeled excavator, reduce the driving burden of the driver, improve the automation level of the wheeled excavator, and ensure the safety of the wheeled excavator driver, the wheeled excavator and the equipment and personnel in its surrounding environment through an automatic control algorithm.

[0040] In some optional implementations of this embodiment, the first detection device 15 includes one or more of a brake pressure sensor, a strain gauge pressure sensor, a pressure sensor, or a pressure strain gauge.

[0041] In some optional implementations of this embodiment, the second detection device 14 includes one or more of a walking pressure sensor, a strain gauge pressure sensor, a pressure sensor, or a pressure strain gauge.

[0042] In some optional implementations of this embodiment, the third detection device 5 includes a rotation speed sensor.

[0043] In an automatic shift control system for a wheeled excavator of the present invention, a first monitoring device 15 is provided on the brake pedal valve of the wheeled excavator, and the detection device is electrically connected to a controller 21 of the wheeled excavator for collecting and monitoring an output pressure signal of the brake pedal valve.

[0044] In some optional implementations of the present embodiment, an indicator light is provided on the operating panel of the wheeled excavator, and the indicator light is used to automatically light up when the automatic shift control 20 automatically parks the wheeled excavator and automatically switches the gearbox to 3 gears.

[0045] In some optional implementations of the present embodiment, the automatic shift control 20 includes one or more of a button, a knob, a touch key, a key, and a push rod.

[0046] When the wheeled excavator is in operation, the driver only needs to press the automatic shift control 20 to enable the excavator to automatically shift gears according to different working conditions. When the driving environment or working environment is good, the driver can manually operate without automatic shifting. When the driving environment or working environment is bad, the driver only needs to press the automatic shift control 20, and the excavator will automatically shift gears according to different working conditions.

[0047] Whether automatic gear shifting is required is determined according to the driver's driving needs.

[0048] Thus, the automatic gear shifting of the wheeled excavator can be realized, while the gear shifting time can be reduced, the accuracy of gear shifting can be ensured, the safety of the operation of the wheeled excavator can be improved, the driving burden of the driver can be reduced, the automation level of the wheeled excavator can be improved, and the safety of the wheeled excavator driver, the wheeled excavator and the equipment and personnel in its surrounding environment can be ensured. In addition, different driving options can be provided to the driver.

[0049] In the embodiment of the present invention, the automatic shift button is used as the automatic shift control 20 to illustrate the technical solution of the present invention.

[0050] In order to make the technical solution of the present invention clearer and more complete, a shift lever 1, a shift control valve 2, a gearbox 3, a travel motor 4, a central rotary body 6, a pilot valve group 7, a pilot relief valve 8, a hydraulic oil tank 9, a pilot pump 10, a main pump 11, an engine 12, a main valve 13, a travel foot valve 16, a brake foot valve 17, a brake oil source 18, a parking button 19 and a controller 21 are also provided in an automatic shift control system for a wheeled excavator of the present invention. The connection relationship and position relationship are as follows: Figure 1 As shown, the above-mentioned components cooperate with the various detection devices and the automatic shift control unit 20 in the invention to realize the automatic shifting of the wheeled excavator.

[0051] How does the automatic gear shifting control system for a wheeled excavator of the present invention realize automatic gear shifting of the wheeled excavator? The principle thereof is further described below in combination with specific working conditions:

[0052] Specifically, in an automatic gear shift control system for a wheeled excavator of the present invention, the system operates as follows:

[0053] When the wheeled excavator is in operation, the automatic gear shift control 20 only needs to be pressed to enable the excavator to automatically shift gears according to different working conditions.

[0054] In the embodiment of the present invention, the technical solution of the present invention is described below by taking the automatic shift button as the automatic shift control 20 .

[0055] Press the automatic shift control 20 and move the shift lever 1 forward or backward, release the handbrake and brake foot valve 17, and step on the travel foot valve 16, the wheel excavator will travel in the automatic shift mode. This mode includes automatic switching between the first and second gears during driving, and automatic parking when stopping midway, and the system will automatically shift gears regardless of whether the shift lever 1 is in the first or second gear.

[0056] Working condition 1: automatic switching between first and second gears;

[0057] like Figure 2 As shown, when the wheeled excavator is driving, the third detection device 5 on the gearbox 3 detects the real-time rotation speed of the gearbox 3. When the rotation speed of the gearbox 3 is lower than the set rotation speed, Y1 of the shift control valve 2 is energized and Y2 is de-energized, and the vehicle drives in the first gear, that is, low-speed and high-torque driving; when the rotation speed of the gearbox 3 is greater than the set rotation speed, Y2 of the shift control valve 2 is energized and Y1 is de-energized, and the vehicle will drive in the second gear, that is, high-speed and low-torque driving.

[0058] It should be noted that the above-mentioned set speed is set according to the actual working conditions and operating environment.

[0059] As an example, the set speed for automatic switching between the first gear and the second gear includes 900 rpm.

[0060] Working condition 2: automatic parking;

[0061] like Figure 3 As shown, during driving, the brake pedal is pressed to slow down the vehicle, and after stopping, the brake is pressed deeply. When the speed of the transmission 3 is detected to be lower than the set value, and the brake pressure is greater than the set value, Y1 and Y2 of the shift control valve 2 are simultaneously de-energized, and the automatic parking is turned on. At the same time, the automatic parking icon is displayed on the instrument to remind the driver;

[0062] As an example, the above-mentioned set speed includes 1 revolution per minute, that is, the parking state, and the wheeled excavator automatically parks when the transmission speed is less than the set value.

[0063] Working condition three: release the automatic parking and start the vehicle;

[0064] like Figure 4 As shown, in the second working condition, when the vehicle restarts, the brake pedal valve 17 is released, and the travel pedal valve 16 is stepped on. When it is detected that the speed of the transmission 3 is lower than the set value, the brake pedal pressure is lower than the set value, and the travel pedal pressure is higher than the set value, Y1 on the shift control valve 2 is energized, and the vehicle starts quickly in the first gear;

[0065] like Figure 5 As shown, when it is detected that the speed of the transmission 3 is higher than the set value, the shift control valve 2Y2 is energized, Y1 is de-energized, and the vehicle travels at a high speed in the second gear;

[0066] Therefore, an automatic shift control system for a wheeled excavator of the present invention can, through an automatic control algorithm, use the acquired pressure data and the real-time rotational speed of the gearbox 3, and compare the detected pressure value and the rotational speed of the gearbox 3 of the wheeled excavator with the corresponding preset value. When the pressure value exceeds or is greater than the set threshold, the shift control valve is controlled to be automatically turned on and off to achieve different gears required under different working conditions.

[0067] In a second aspect, the present invention further provides a wheeled excavator, on which the above-mentioned automatic gear shifting control system for the wheeled excavator is provided.

[0068] Therefore, the wheeled excavator of the present invention can realize automatic gear shifting of the wheeled excavator by automatically parking the wheeled excavator and automatically switching the three gears of the gearbox through the automatic control algorithm, reduce the gear shifting time, ensure the accuracy of the gear shifting, improve the safety of the operation of the wheeled excavator, reduce the driving burden of the driver, improve the automation level of the wheeled excavator, and ensure the safety of the wheeled excavator driver, the wheeled excavator and the equipment and personnel in its surrounding environment.

[0069] Thirdly, Figure 6 As shown, the present invention also provides an automatic gear shift control method for a wheeled excavator, comprising the following steps S1-S3:

[0070] Step S1: detecting the braking pressure and the traveling pressure of the wheeled excavator to obtain the braking pressure data and the traveling pressure data of the wheeled excavator;

[0071] In some optional implementations of this embodiment, the pressure data is obtained through one or more elements of a brake pressure sensor, a strain gauge pressure sensor, a pressure sensor, or a pressure strain gauge.

[0072] As an example, when obtaining the brake pressure of the wheeled excavator, the brake pressure sensor is connected to the brake foot valve 17 on the wheeled excavator; when obtaining the travel pressure of the wheeled excavator, the travel pressure sensor is connected to the travel foot valve 16 on the wheeled excavator.

[0073] In some optional implementations of this embodiment, in order to improve data processing efficiency and reduce the impact of data transmission, after the above-mentioned pressure data is acquired, the acquired pressure data is transmitted to the controller 21 of the wheeled excavator for temporary storage and processing.

[0074] Step S2: Detecting the real-time speed of the gearbox 3 of the wheel excavator to obtain the real-time speed data of the gearbox 3 of the wheel excavator;

[0075] As an example, when the real-time rotational speed of the wheel excavator gearbox 3 is obtained, it is obtained through a rotational speed sensor, and the rotational speed sensor is set on the output shaft of the wheel excavator gearbox 3. Thus, the real-time rotational speed of the gearbox 3 can be accurately obtained, which is used to accurately determine the shifting timing of the gearbox 3.

[0076] In some optional implementations of this embodiment, in order to improve data processing efficiency and reduce the impact of data transmission, after the real-time speed data of the above-mentioned gearbox 3 is acquired, the acquired pressure data is transmitted to the controller 21 of the wheeled excavator for temporary storage and processing.

[0077] Step S3: Based on the obtained brake pressure data, travel pressure data and real-time speed data of the gearbox 3 of the wheeled excavator, the wheeled excavator is automatically parked and the gearbox 3 is automatically switched through an automatic control algorithm.

[0078] As an example, the above-mentioned automatic control algorithm is pre-transmitted from the outside and stored in the controller 21 of the wheeled excavator, or the automatic control algorithm is pre-input into the storage device of the wheeled excavator. When the gear position of the wheeled excavator is automatically switched, the controller 21 of the wheeled excavator calls the stored automatic control algorithm to realize automatic gear shifting of the wheeled excavator.

[0079] The specific gear shifting process is carried out according to the working conditions shown above.

[0080] Therefore, an automatic shift control system for a wheeled excavator of the present invention can, through an automatic control algorithm, use the acquired pressure data and the real-time rotational speed of the gearbox 3, and compare the detected pressure value and the rotational speed of the gearbox 3 of the wheeled excavator with the corresponding preset value. When the pressure value exceeds or is greater than the set threshold, the shift control valve is controlled to be automatically turned on and off to achieve different gears required under different working conditions.

[0081] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic gear shift control system for a wheeled excavator, characterized in that: include: a first detection device, the first detection device being connected to a brake pedal valve on the wheeled excavator, for detecting a brake pressure of the wheeled excavator, and transmitting the detected brake pressure to a controller of the wheeled excavator; a second detection device, the second detection device being connected to a travel foot valve on the wheeled excavator, for detecting a travel pressure of the wheeled excavator, and transmitting the detected travel pressure to a controller of the wheeled excavator; a third detection device, the third detection device being connected to an output end of the gearbox of the wheel excavator, and being used for detecting a real-time rotation speed of the gearbox of the wheel excavator, and transmitting the detected real-time rotation speed of the gearbox to a controller of the wheel excavator; An automatic shift control, the automatic shift control is electrically connected to a controller on the wheeled excavator, the automatic shift control is electrically connected to the controller on the wheeled excavator, the automatic shift control is used to automatically park the wheeled excavator and automatically switch gears of the gearbox under the action of the controller through an automatic control algorithm according to the braking pressure of the wheeled excavator detected by the first detection device, the walking pressure of the wheeled excavator detected by the second detection device, and the real-time speed of the gearbox of the wheeled excavator detected by the third detection device, wherein the automatic control algorithm is pre-transmitted from the outside and stored in the controller of the wheeled excavator, or the automatic control algorithm is pre-input into the storage device of the wheeled excavator, and the controller of the wheeled excavator calls the stored automatic control algorithm when the gear of the wheeled excavator is automatically switched.

2. The automatic gear shift control system for a wheeled excavator according to claim 1, characterized in that: The first detection device includes one or more of a brake pressure sensor, a strain gauge pressure sensor, a pressure sensor or a pressure strain gauge.

3. The automatic gear shift control system for a wheeled excavator according to claim 1, characterized in that: The second detection device includes one or more of a walking pressure sensor, a strain gauge pressure sensor, a pressure sensor or a pressure strain gauge.

4. The automatic gear shift control system for a wheeled excavator according to claim 1, characterized in that: The third detection device includes a rotation speed sensor.

5. The automatic gear shift control system for a wheeled excavator according to claim 1, characterized in that: An indicator light is arranged on the operation panel of the wheeled excavator, and the indicator light is used to automatically light up when the automatic shift control performs automatic parking and automatic shifting of the gearbox on the wheeled excavator.

6. The automatic gear shift control system for a wheeled excavator according to claim 1, characterized in that: The automatic shift control includes one or more of a button, a knob, a touch key, a key and a push rod.

7. A wheeled excavator, characterized in that: The wheeled excavator is provided with an automatic gear shifting control system for a wheeled excavator according to any one of claims 1 to 6.

8. A wheeled excavator automatic gear shift control method, characterized in that: include: Detecting the brake pressure and travel pressure of the wheeled excavator to obtain the brake pressure data and travel pressure data of the wheeled excavator; Detecting the real-time speed of the gearbox of the wheel excavator to obtain the real-time speed data of the gearbox of the wheel excavator; According to the obtained brake pressure data, travel pressure data and real-time speed data of the gearbox of the wheeled excavator, the wheeled excavator is automatically parked and the gearbox gear is automatically switched through an automatic control algorithm.

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