A digging end walking control system, control method and excavator loader

Abstract

This invention discloses a digging end travel control system, control method, and excavator loader, including a machine VCU, a digging mode determination switch, a seat position sensor, an FNR activation switch, and an FNR control handle. The machine VCU determines whether to activate the FNR control handle via the FNR activation switch to enable the digging end FNR function based on the machine's operating mode feedback from the digging mode determination switch, the seat direction feedback from the seat position sensor, and the gearbox gear signal. When the machine is in digging operating mode, the gearbox is in neutral, and the seat faces the digging end, the machine VCU activates the FNR activation switch. A single press of the FNR activation switch activates the FNR control handle. Based on the control signal from the FNR control handle, the machine VCU sends travel direction switching and gear control signals to the gearbox, and activates the braking components. This invention, by activating the digging end FNR function, enables low-speed vehicle movement and overall vehicle braking during digging end operations, thereby simplifying the movement operation process of the excavator loader and improving operational efficiency.

Description

Technical Field

[0001] This invention relates to the field of excavator end travel control technology, and in particular to an excavator end travel control system, control method, and excavator loader. Background Technology

[0002] Some excavators and loaders now feature an integrated FNR gear control function on the loading end control handle. Through the FNR function button, the operator can easily switch the overall machine's direction of travel while operating the loading device, meeting the needs of frequent direction switching during loading and unloading operations and improving work efficiency.

[0003] However, for excavation work, due to its complexity, conventional backhoe loaders still employ traditional operating procedures: retracting the excavating device, retracting the outriggers, rotating the seat to face the loading end, retracting the loading device, changing gears, moving the vehicle to the next work area, rotating the seat to face the excavation end, and manipulating the outriggers to prepare for the next excavation operation. This process of rotating the seat and changing gears is cumbersome and inefficient when focused solely on excavation. Therefore, it is necessary to improve the operating method of backhoe loaders to simplify the process and increase efficiency during excavation work. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a digging end travel control system, control method, and digging loader that simplifies the operation process of moving the digging loader during operation and improves the efficiency of operation.

[0005] Technical Solution: To achieve the above objectives, the present invention provides a digging end walking control system, including a machine VCU, a digging mode judgment switch for controlling the machine's working mode, a seat position sensor for judging the seat direction, an FNR activation switch, and an FNR control handle. The machine VCU determines whether to activate the FNR control handle via the FNR activation switch to enable the digging end FNR function based on the machine working mode feedback from the digging mode judgment switch, the seat direction feedback from the seat position sensor, and the gearbox gear signal.

[0006] The conditions for activating the FNR function on the excavator end via the FNR activation switch are that the machine is in excavation mode, the gearbox is in neutral, and the seat is facing the excavation device end.

[0007] The digging mode determination switch is a three-position rocker switch, which controls the machine to be in walking mode, loading mode and digging mode respectively.

[0008] The FNR activation switch is a two-position switch. Pressing the FNR activation switch an odd number of times activates the excavator end FNR function, while pressing the FNR activation switch an even number of times deactivates the excavator end FNR function.

[0009] This also includes an activation indicator light.

[0010] The control method based on the above-mentioned excavator end walking control system of the present invention includes:

[0011] (1) When the machine is in digging working mode, the gearbox is in neutral and the seat is facing the digging working device end, the machine VCU activates the FNR activation switch.

[0012] (2) Press the FNR activation switch once to activate the FNR control handle;

[0013] (3) The whole machine VCU sends the driving direction switching and gear control signals to the gearbox based on the FNR control handle control signal, and activates the braking components.

[0014] The braking assembly includes a digging brake switch and a rear axle braking system. When the digging brake switch is activated, the brake oil circuit provides pressurized oil to the rear axle braking system to brake the entire machine.

[0015] When the excavator brake switch is in the working state, the gearbox is always in neutral.

[0016] The excavation braking switch is a self-resetting switch.

[0017] The excavator loader of the present invention includes the excavator end travel control system described above.

[0018] Beneficial effects: The present invention has the following advantages: By activating the FNR function of the excavator end, the present invention can realize low-speed movement of the vehicle and braking of the whole vehicle during excavator end operation, thereby simplifying the operation process of moving the excavator loader during operation and improving the operation efficiency. Attached Figure Description

[0019] Figure 1 Logic control schematic for activating the FNR function at the excavator end;

[0020] Figure 2 This is a schematic diagram of the logic control principle of the FNR control handle after the FNR function of the excavator is activated. Detailed Implementation

[0021] The technical solution of the present invention will be described in detail below with reference to the embodiments and accompanying drawings.

[0022] The excavator end walking control system of the present invention includes an excavation mode judgment switch, a seat position sensor, a whole machine control unit (VCU), an FNR activation switch and activation indicator light, and an FNR (forward, neutral, reverse) control handle.

[0023] The digging mode detection switch is a three-position rocker switch, which can control the machine to be in walking mode, loading mode, and digging mode respectively. The machine being in digging mode is one of the necessary conditions for activating the FNR function on the digging end.

[0024] The seat position sensor determines whether the operator is in the loading or digging direction and sends a signal to the machine's VCU to determine the machine's forward direction. Similarly, the seat position sensor being in the digging direction is also a necessary condition for the activation of the FNR function on the digging end.

[0025] The VCU (Vehicle Control Unit) is used to determine the forward direction of the machine and the gearbox gear position; it also receives signals from the excavation mode start / stop seat position sensor and performs signal judgment.

[0026] The FNR activation switch is generally a two-position switch, which can be either a self-locking switch or a self-resetting switch. For safety reasons, a self-resetting switch is recommended. It is used to switch the FNR function status of the excavator end, i.e., toggling the active / inactive state. When the excavator end FNR function activation conditions are met, pressing the FNR activation switch an odd number of times activates the excavator end FNR function, while pressing it an even number of times deactivates the excavator end FNR function.

[0027] The activation conditions for the FNR function include: 1) the machine is in digging mode; 2) the gearbox mechanical control gear is in neutral; and 3) the operator's seat is facing the digging device end, i.e., the digging direction. All three conditions must be met simultaneously for the FNR activation switch to activate the digging end's FNR function. If any condition is not met, the digging end's FNR function will not be activated. Figure 1 As shown.

[0028] The activation indicator light is used to indicate to the operator the current status of the excavator's FNR (Fly-Noise Reduction) function. The indicator light illuminates when the excavator's FNR is active; conversely, it remains off when the FNR is not active. This indicator light can be integrated with the FNR activation switch or installed separately; its purpose is to provide the operator with a visual reminder.

[0029] After the FNR function on the excavator is activated, logic control is performed via the FNR control handle, such as... Figure 2As shown, specifically: After the excavator's FNR function is activated, when the FNR control handle is in the F position, the vehicle's VCU receives the FNR control handle signal and sends a control signal to the transmission control solenoid valve. At this time, the VCU switches the machine's forward direction control judgment logic, treating the excavator as the machine's forward direction. During forward movement, the VCU simultaneously controls the transmission gear to always be in 1st gear. If the transmission brake oil circuit control solenoid valve is activated during forward movement, causing the excavator brake switch to be in the working state, the brake oil circuit provides pressurized oil to the rear axle braking system, achieving machine braking. When the excavator brake switch is in the working state, regardless of whether the transmission gear handle or the FNR control handle is in neutral, the transmission gear is always in neutral.

[0030] When the FNR control lever is in the R position, the basic control logic is the same as in the F position, only the output direction of the transmission is changed.

[0031] The FNR control handle is typically integrated into the working device control handle, but can also be a separate unit. When the FNR function is activated at the excavator end, it can be used to send a signal to the VCU (Vehicle Control Unit) to switch the overall machine's travel direction. The FNR function button on the FNR control handle can be a self-locking button or a self-resetting button.

[0032] During the above process, the machine's VCU receives the FNR control handle signal and sends the travel direction switching and gear control signals to the transmission; in addition, when the FNR function of the excavator end is detected to be activated, the machine's VCU activates the braking components in the transmission.

[0033] The excavator brake switch is used to send a braking signal to the VCU of the entire machine. This switch is generally a self-resetting switch, and can be either a foot switch or a manual switch.

[0034] The rear axle braking system provides braking service to the entire machine when the excavator brake switch is activated.

Claims

1. A digging end travel control system, comprising a whole machine VCU, characterized in that, It also includes a digging mode judgment switch to control the overall machine working mode, a seat position sensor to determine the seat direction, an FNR activation switch, and an FNR control handle. The machine's VCU determines whether to activate the FNR control handle through the FNR activation switch to enable the FNR function on the digging end based on the overall machine working mode feedback from the digging mode judgment switch, the seat direction feedback from the seat position sensor, and the gearbox gear signal.

2. The excavator end walking control system according to claim 1, characterized in that, The conditions for activating the FNR function on the excavator end via the FNR activation switch are that the entire machine is in excavation working mode, the gearbox is in neutral, and the seat is facing the excavation working device end.

3. The excavator end walking control system according to claim 1, characterized in that, The digging mode determination switch is a three-position rocker switch, which controls the machine to be in walking mode, loading mode and digging mode respectively.

4. The excavator end walking control system according to claim 1, characterized in that, The FNR activation switch is a two-position switch. Pressing the FNR activation switch an odd number of times activates the excavator end FNR function, while pressing the FNR activation switch an even number of times deactivates the excavator end FNR function.

5. The excavator end walking control system according to claim 1, characterized in that, It also includes an activation indicator light.

6. A control method based on the excavator end walking control system of claim 1, characterized in that, include: (1) When the machine is in digging working mode, the gearbox is in neutral and the seat is facing the digging working device end, the machine VCU activates the FNR activation switch. (2) Press the FNR activation switch once to activate the FNR control handle; (3) The whole machine VCU sends the driving direction switching and gear control signals to the gearbox based on the FNR control handle control signal, and activates the braking components.

7. The control method of the excavator end walking control system according to claim 6, characterized in that, The braking assembly includes a digging brake switch and a rear axle braking system. When the digging brake switch is activated, the brake oil circuit provides pressurized oil to the rear axle braking system to brake the entire machine.

8. The control method of the excavator end walking control system according to claim 7, characterized in that, When the excavator brake switch is engaged, the gearbox is always in neutral.

9. The control method for the excavator end travel control system according to claim 7, characterized in that, The excavation braking switch is a self-resetting switch.

10. An excavator loader, characterized in that, Includes the excavator end walking control system as described in any one of claims 1-5.

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