Excavating end walking control system, control method and backhoe loader

Abstract

The invention discloses a digging end walking control system and method and a digging loader, the digging end walking control system comprises a complete machine VCU, a digging mode judgment switch, a seat position sensor, an FNR activation switch and an FNR control handle, and the complete machine VCU judges the complete machine working mode fed back by the switch based on the digging mode, the seat direction fed back by the seat position sensor and a gearbox gear signal; whether an FNR control handle is activated through an FNR activation switch or not is judged, so that the FNR function of the digging end is started; when the whole machine is in an excavation working mode, the gear of the gearbox is located in a neutral position, and the seat faces the excavation working device end, the whole machine VCU activates the FNR activation switch, presses the FNR activation switch once, activates the FNR control handle, and sends advancing direction switching and gear control signals to the gearbox and activates the brake assembly based on the FNR control handle control signal. By activating the FNR function of the excavating end, low-speed vehicle moving and whole vehicle braking are achieved when the excavating end works, so that the shifting control process of the excavating loader during working is simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of excavation end travel control, and in particular to an excavation end travel control system, a control method and an excavator loader. Background Art

[0002] Some existing excavator loaders have an integrated FNR gear control function on the loading end control handle. Through the FNR function button, the operator can easily switch the travel direction of the entire machine during the operation of the loading work device, meeting the needs of frequent switching of travel directions under loading and unloading conditions and improving work efficiency.

[0003] However, for the excavation operation, due to its complexity, conventional excavator loaders still use the traditional operation process: retract the excavation working device, retract the whole machine stabilizing legs, turn the seat, face the loading end, retract the loading working device, change the gearbox gear, move the vehicle to the next operation area, turn the seat, face the excavation end, operate the whole machine stabilizing legs, and complete the next excavation operation preparation. In this process, turning the seat and changing the gearbox gear are cumbersome operations, and the operation efficiency is not high under the conditions of focusing on the excavation operation. Therefore, it is necessary to improve the operation method of the excavator loader to simplify the process of the excavation operation and improve the operation efficiency. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide an excavation end travel control system, a control method and an excavation loader that simplify the operation process of shifting during operation of an excavator loader and improve the operation efficiency.

[0005] Technical solution: To achieve the above-mentioned purpose, an excavator end travel control system described in the present invention includes a whole machine VCU, and also includes an excavation mode judgment switch for controlling the whole machine working mode, a seat position sensor for judging the seat direction, an FNR activation switch, and an FNR control handle. The whole machine VCU determines whether to activate the FNR control handle through the FNR activation switch to turn on the excavator end FNR function based on the whole machine working mode feedback from the excavation mode judgment switch, the seat direction feedback from the seat position sensor, and the gearbox gear signal.

[0006] Among them, the condition for turning on the FNR function of the excavation end through the FNR activation switch is that the whole machine is in the excavation working mode, the gearbox gear is in neutral, and the seat is facing the excavation working device end.

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

[0008] Wherein, the FNR activation switch is a two-position switch. When the FNR activation switch is pressed an odd number of times, the excavation end FNR function is activated, and when the FNR activation switch is pressed an even number of times, the excavation end FNR function is not activated.

[0009] This also includes an activation indicator light.

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

[0011] (1) When the machine is in excavation mode, the gearbox is in neutral and the seat is facing the excavation device, the VCU of the machine activates the FNR activation switch;

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

[0013] (3) Based on the FNR control handle control signal, the VCU sends the travel direction switching and gear control signals to the gearbox and activates the brake components.

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

[0015] Among them, when the excavation brake switch is in working state, the gearbox gear is always in neutral.

[0016] Wherein, the excavation brake switch is a self-resetting switch.

[0017] The backhoe loader described in the present invention comprises the above-mentioned excavation end travel control system.

[0018] Beneficial effects: The present invention has the following advantages: The present invention can realize low-speed moving of the vehicle and braking of the entire vehicle during operation of the excavation end by activating the FNR function of the excavation end, thereby simplifying the operation process of shifting during operation of the excavator loader and improving operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 To activate the FNR function logic control schematic diagram at the excavation end;

[0020] Figure 2 This is the logic control schematic diagram of the FNR control handle after the FNR function on the excavation end is activated. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is described in detail below in conjunction with the embodiments and drawings.

[0022] The excavation end travel 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 an activation indicator light, and an FNR (forward, neutral, reverse) control handle.

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

[0024] The seat position sensor can determine whether the operator is in the loading direction or the digging direction, and send a signal to the VCU of the whole machine to determine the front direction of the whole machine. Similarly, when the seat position sensor is in the digging direction, it is also one of the necessary conditions for activating the FNR function at the excavation end.

[0025] The whole machine VCU is used to determine the forward direction of the whole machine and the gear position of the gearbox; it receives the signal sent by the seat position sensor for judging the on / off mode and performs signal judgment.

[0026] The FNR activation switch is generally a two-position switch component. It can be a self-locking switch or a self-resetting switch. For safety reasons, it is recommended to use a self-resetting switch. It is used to switch the FNR function state of the excavation end, that is, the activation / inactivation state switch. When the activation conditions of the excavation end FNR function are met, the excavation end FNR function is activated when the FNR activation switch is pressed an odd number of times, and the excavation end FNR function is in an inactive state when the FNR activation switch is pressed an even number of times.

[0027] The FNR function activation conditions include: 1) the whole machine is in the excavation working mode, 2) the gearbox mechanical control gear is in neutral, and 3) the operator's seat is facing the excavation working device end, that is, the excavation direction. These three sets of judgment conditions must be met at the same time for the FNR activation switch to activate the excavation end FNR function. If any of the conditions are not met, the excavation end FNR function will not be activated. Figure 1 shown.

[0028] The activation indicator light is used to remind the operator of the current status of the excavator FNR function. When the excavator FNR is activated, the activation indicator light is on; otherwise, the activation indicator light is off. The indicator light can be integrated with the FNR activation switch or installed separately. Its purpose is to provide a light signal reminder for the operator.

[0029] After the FNR function at the excavation end is activated, the logic control is performed through the FNR control handle, such as Figure 2As shown, specifically: after the FNR function of the excavation end is activated, when the FNR control handle is operated in the F gear, the vehicle VCU receives the FNR operating handle signal and sends a control signal to the transmission control solenoid valve. At this time, the whole machine VCU switches the whole machine forward direction control judgment logic and regards the excavation end as the whole machine forward direction. During the forward process, the whole machine VCU also controls the transmission gear to always be in 1st gear. If the transmission brake oil circuit control solenoid valve is activated during the forward process and the excavation brake switch is in the working state, the brake oil circuit provides pressure oil to the rear axle brake system to achieve the whole machine braking. When the excavation brake switch is in the working state, regardless of whether the transmission gear handle and the FNR control handle are in neutral, the transmission gear is always in neutral.

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

[0031] The FNR control handle is generally integrated into the working device control handle, but can also be arranged separately. When the FNR function at the excavation end is activated, it can be used to send a signal for the whole machine to switch the travel direction to the whole machine VCU. The FNR function button on the FNR control handle can be a self-locking button or a self-reset button.

[0032] In the above process, the whole machine VCU receives the FNR control handle signal and sends the travel direction switching and gear control signals to the gearbox; in addition, when the activation of the FNR function at the excavation end is detected, the whole machine VCU activates the brake components in the gearbox.

[0033] The excavation brake switch is used to send a brake signal to the VCU of the whole machine. This switch is generally a self-reset switch, which can be a foot switch or a hand switch.

[0034] The rear axle braking system provides braking service for the entire machine when the excavation brake switch is effective.

Claims

1. An excavator end travel control system, including a complete VCU, characterized in that: It also includes an excavation mode judgment switch that controls the working mode of the entire machine, a seat position sensor that determines the direction of the seat, an FNR activation switch, and an FNR control handle. The entire machine VCU determines whether to activate the FNR control handle through the FNR activation switch to turn on the FNR function at the excavation end based on the entire machine working mode feedback from the excavation mode judgment switch, the seat direction feedback from the seat position sensor, and the transmission gear position signal.

2. The excavation end travel control system according to claim 1, characterized in that: The condition for turning on the FNR function at the excavation end through the FNR activation switch is that the whole machine is in excavation working mode, the gearbox gear is in neutral, and the seat is facing the excavation working device end.

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

4. The excavation end travel control system according to claim 1, characterized in that: The FNR activation switch is a two-position switch. When the FNR activation switch is pressed an odd number of times, the excavation end FNR function is activated. When the FNR activation switch is pressed an even number of times, the excavation end FNR function is not activated.

5. The excavation end travel control system according to claim 1, characterized in that: Also includes an activation indicator light.

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

7. The control method of the excavator end travel control system according to claim 6, characterized in that: The brake assembly comprises an excavation brake switch and a rear axle brake system. When the excavation brake switch is activated, the brake oil circuit provides pressure oil to the rear axle brake system to brake the entire machine.

8. The control method of the excavator end travel control system according to claim 7, characterized in that: When the excavation brake switch is in operation, the transmission gear is always in neutral.

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

10. An excavator loader, characterized in that: It includes the excavation end travel control system as described in any one of claims 1-5.

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