A cruise control device and method for excavators

Abstract

This invention discloses a cruise control device and method for an excavator. The user presses a rocker switch to the position corresponding to the cruise direction. The rocker switch sends an electrical signal to the controller for the corresponding cruise direction. The user activates the cruise switch setting in the controller, which then sends an electrical signal to the proportional solenoid valve to open the corresponding oil outlet. The proportional solenoid valve receives the electrical signal and outputs hydraulic oil. The hydraulic oil enters the shuttle valve and is injected into the pilot control oil circuit for the corresponding direction. This invention achieves constant speed cruise, and the cruise speed can be steplessly adjusted between zero and the maximum travel speed, ensuring stable travel and reducing the operator's workload. The manual travel and cruise systems are independent and do not interfere with each other, improving safety and stability. It does not affect the normal manual operation of the excavator and is easy to install on existing excavators with minimal damage, demonstrating good practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of excavators, in particular to an excavator constant speed cruise control device and method. BACKGROUND

[0002] The excavator is a kind of earth-moving machinery that uses a shovel to excavate materials above or below the surface of the machine and loads them into transport vehicles or unloads them into a stockpile yard. The excavated materials are mainly soil, coal, sand and soil and rock after pre-loosening. From the development of engineering machinery in recent years, the development of excavators is relatively fast. The excavator has become one of the most important engineering machinery in engineering construction. In some working conditions, the excavator is required to walk at a certain speed. Since manual operation has slight shaking, it is difficult to ensure constant speed. At the same time, other operations are generally added when walking, and the driver works for a long time, so the operation intensity is large. In addition, the traditional conventional excavator does not have a constant speed cruise function. Therefore, the present application provides a device and method that can be simply installed on a traditional excavator to realize the cruise function, which solves the problem of the present application. SUMMARY

[0003] The present application provides an excavator constant speed cruise control device and method to solve at least one of the above technical problems.

[0004] The technical solution of the present application to solve the above technical problems is as follows: an excavator constant speed cruise control device and method, comprising a walking pilot valve, a controller, a proportional electromagnetic valve and a main valve. The left front walking oil outlet of the walking pilot valve is communicated with the left walking valve core of the main valve through a left front walking oil pipe. The left rear walking oil outlet of the walking pilot valve is communicated with the left walking valve core of the main valve through a left rear walking oil pipe. The right front walking oil outlet of the walking pilot valve is communicated with the right walking valve core of the main valve through a right front walking oil pipe. The right rear walking oil outlet of the walking pilot valve is communicated with the right walking valve core of the main valve through a right rear walking oil pipe. The controller is electrically connected with a rocker switch. The controller is electrically connected with a proportional electromagnetic valve. The oil inlet of the proportional electromagnetic valve is communicated with the oil pump of the excavator. The first oil outlet of the proportional electromagnetic valve is communicated with the left rear walking oil pipe and the right rear walking oil pipe through a shuttle valve. The second oil outlet of the proportional electromagnetic valve is communicated with the left front walking oil pipe and the right front walking oil pipe through a shuttle valve.

[0005] Further, the left rear walking oil outlet and the first oil outlet are in communication with the oil inlet of the corresponding shuttle valve, and the oil outlet of the shuttle valve is in communication with the left walking valve core; the right rear walking oil outlet and the first oil outlet are in communication with the oil inlet of the corresponding shuttle valve, and the oil outlet of the shuttle valve is in communication with the right walking valve core; the left front walking oil pipe and the second oil outlet are in communication with the oil inlet of the corresponding shuttle valve, and the oil outlet of the shuttle valve is in communication with the left walking valve core; and the right front walking oil pipe and the second oil outlet are in communication with the oil inlet of the corresponding shuttle valve, and the oil outlet of the shuttle valve is in communication with the right walking valve core.

[0006] Further, the rocker switch is a three-position self-locking type, the middle position of the rocker switch is a manual walking mode, the upper position of the rocker switch is a forward cruise mode, and the lower position of the rocker switch is a backward walking mode.

[0007] Further, the controller is electrically connected with an emergency stop button.

[0008] Further, the controller is an excavator monitor.

[0009] Further, the cruise keeping method comprises the following steps: a user presses a rocker switch to a position corresponding to a cruise direction, the rocker switch gives a controller an electric signal corresponding to the cruise direction, the user sets a cruise switch in the controller, the controller gives a proportional electromagnetic valve an electric signal for opening a corresponding oil outlet, the proportional electromagnetic valve receives the electric signal and outputs hydraulic oil, the hydraulic oil enters a shuttle valve and is injected into a pilot control oil path in a corresponding direction, the pilot control oil path drives a main valve core of corresponding walking, the main valve is opened, and an excavator is driven to walk at a constant speed.

[0010] The cruise speed adjusting method comprises the following steps:

[0011] A user changes a speed setting of a controller to a corresponding speed, the controller outputs an electric signal to a proportional electromagnetic valve, the proportional electromagnetic valve receives the electric signal and controls the opening degree of a corresponding valve port to adjust the pressure of a pilot control oil, the pressure of the pilot control oil path is changed to change the opening degree of a main valve core of corresponding walking, and the walking speed of the excavator at a constant speed is changed to the corresponding speed.

[0012] Further, the emergency stop method of the constant-speed cruise comprises the following steps:

[0013] A user presses an emergency stop button, the emergency stop button transmits an electric signal to a controller, the controller receives the electric signal of the emergency stop, the controller sends an emergency stop electric signal to a proportional electromagnetic valve, the proportional electromagnetic valve is depressurized, a main valve core of corresponding walking is reset, and the constant-speed cruise of the excavator is stopped.

[0014] The excavator with the constant-speed cruise function has the following advantages:

[0015] The application realizes constant speed cruise by adopting proportional electromagnetic valve control and built-in walking control program of monitor, and cruise speed can be steplessly adjusted between zero and maximum walking speed, walking is stable, and working strength of driver is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The application is illustrated by the drawings.

[0017] In the drawings, the components represented by each reference numeral are listed as follows:

[0018] Controller 1; rocker switch 2; emergency stop button 3; proportional electromagnetic valve 4; shuttle valve 5; walking pilot valve 6; main valve 7. DETAILED DESCRIPTION

[0019] The application will be further described below in conjunction with specific embodiments, which should be understood as merely illustrating the application but not limiting the scope of the application. Furthermore, it should be understood that those skilled in the art can make various modifications or changes to the application after reading the content taught by the application, and these equivalent forms also fall within the scope defined by the appended claims.

[0020] Example 1: refer to Figure 1 is a schematic diagram of each structure of the application, including walking pilot valve 6, controller 1, proportional electromagnetic valve 4, main valve 7, left front walking oil outlet of walking pilot valve 6 is communicated with left walking valve core of main valve 7 through left front walking oil pipe, left rear walking oil outlet of walking pilot valve 6 is communicated with left walking valve core of main valve 7 through left rear walking oil pipe, right front walking oil outlet of walking pilot valve 6 is communicated with right walking valve core of main valve 7 through right front walking oil pipe, right rear walking oil outlet of walking pilot valve 6 is communicated with right walking valve core of main valve 7 through right rear walking oil pipe, controller 1 is electrically connected with rocker switch 2, and the direction of cruise is controlled through rocker switch 2, controller 1 is electrically connected with proportional electromagnetic valve 4, oil inlet of proportional electromagnetic valve 4 is communicated with oil pump of excavator, first oil outlet of proportional electromagnetic valve 4 is communicated with left rear walking oil pipe and right rear walking oil pipe through shuttle valve 5, when output pressure of first oil outlet, excavator cruises at constant speed backward, second oil outlet of proportional electromagnetic valve 4 is communicated with left front walking oil pipe and right front walking oil pipe through shuttle valve 5, when output pressure of second oil outlet, excavator cruises at constant speed forward.

[0021] Specifically, the left rear walking oil outlet and the first oil outlet are communicated with the oil inlet of the corresponding shuttle valve 5, and the oil outlet of the shuttle valve 5 is communicated with the left walking valve core; the right rear walking oil outlet and the first oil outlet are communicated with the oil inlet of the corresponding shuttle valve 5, and the oil outlet of the shuttle valve 5 is communicated with the right walking valve core; when the first oil outlet outputs pressure, the left rear walking oil outlet and the right rear walking oil outlet are communicated with the walking valve core cut-off; when the left rear walking oil outlet and the right rear walking oil outlet output pressure, the first oil outlet is communicated with the walking valve core cut-off; the left front walking oil pipe and the second oil outlet are communicated with the oil inlet of the corresponding shuttle valve 5, and the oil outlet of the shuttle valve 5 is communicated with the left walking valve core; the right front walking oil pipe and the second oil outlet are communicated with the oil inlet of the corresponding shuttle valve 5, and the oil outlet of the shuttle valve 5 is communicated with the right walking valve core; when the second oil outlet inputs pressure, the left front walking oil pipe and the right front walking oil pipe are communicated with the walking valve core cut-off; when the left front walking oil pipe and the right front walking oil pipe output pressure, the second oil outlet is communicated with the walking valve core cut-off; the manual walking and the cruise system are independent and do not affect each other, thereby improving safety and stability.

[0022] Specifically, the rocker switch 2 is a three-position self-locking type, the middle position of the rocker switch 2 is a manual walking mode, the cruise system is closed, the upper position of the rocker switch 2 is a forward cruise mode, and the lower position of the rocker switch 2 is a backward walking mode.

[0023] Specifically, the controller 1 is electrically connected with an emergency stop button 3, and the excavator can be stopped in emergency.

[0024] Specifically, the controller 1 is an excavator monitor, and the monitor is a traditional monitor of the excavator, only the internal program is increased with the constant speed cruise control function, and the integration degree is high.

[0025] Specifically, when the forward cruise is maintained, the user presses the rocker switch 2 to the position of the forward cruise mode, the rocker switch 2 gives the controller 1 an electric signal of the forward cruise direction, the user opens the setting of the cruise switch in the controller 1, the controller 1 gives the second oil outlet of the proportional electromagnetic valve 4 an electric signal of opening, the proportional electromagnetic valve 4 receives the electric signal and outputs hydraulic oil, the hydraulic oil enters the shuttle valve 5 and injects the hydraulic oil into the forward pilot control oil way, the pilot control oil way pushes the valve core of the forward walking main valve 7, the main valve 7 is opened, and the excavator is driven to walk at a constant speed;

[0026] When the backward cruise is maintained, the user presses the rocker switch 2 to the position of the backward cruise mode, the rocker switch 2 gives the controller 1 an electric signal of the backward cruise direction, the user opens the setting of the cruise switch in the controller 1, the controller 1 gives the first oil outlet of the proportional electromagnetic valve 4 an electric signal of opening, the proportional electromagnetic valve 4 receives the electric signal and outputs hydraulic oil, the hydraulic oil enters the shuttle valve 5 and injects the hydraulic oil into the backward pilot control oil way, the pilot control oil way pushes the valve core of the backward walking main valve 7, the main valve 7 is opened, and the excavator is driven to walk at a constant speed.

[0027] When the cruise speed is adjusted, the user changes the speed setting of the controller 1 to 50% of the speed, the controller 1 outputs an electric signal to the proportional electromagnetic valve 4, the proportional electromagnetic valve 4 receives the electric signal and controls the opening degree of the corresponding valve port to adjust the pressure of the pilot control oil, the pilot control oil pressure changes to change the opening degree of the main valve 7 valve core corresponding to the walking, and the walking speed of the excavator is changed to 50% of the fastest speed.

[0028] When the cruise speed is adjusted, the user changes the speed setting of the controller 1 to 50% of the speed, the controller 1 outputs an electric signal to the proportional electromagnetic valve 4, the proportional electromagnetic valve 4 receives the electric signal and controls the opening degree of the corresponding valve port to adjust the pressure of the pilot control oil, the pilot control oil pressure changes to change the opening degree of the main valve 7 valve core corresponding to the walking, and the walking speed of the excavator is changed to 50% of the fastest speed.

[0029] When the cruise speed is adjusted, the user changes the speed setting of the controller 1 to 50% of the speed, the controller 1 outputs an electric signal to the proportional electromagnetic valve 4, the proportional electromagnetic valve 4 receives the electric signal and controls the opening degree of the corresponding valve port to adjust the pressure of the pilot control oil, the pilot control oil pressure changes to change the opening degree of the main valve 7 valve core corresponding to the walking, and the walking speed of the excavator is changed to 50% of the fastest speed.

[0030] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A kind of excavator constant speed cruise control device, including travel pilot valve (6), controller (1), proportional solenoid valve (4), main valve (7), the left front travel outlet of the travel pilot valve (6) is communicated with the left travel spool of main valve (7) by left front travel oil pipe, the left rear travel outlet of the travel pilot valve (6) is communicated with the left travel spool of main valve (7) by left rear travel oil pipe, the right front travel outlet of the travel pilot valve (6) is communicated with the right travel spool of main valve (7) by right front travel oil pipe, the right rear travel outlet of the travel pilot valve (6) is communicated with the right travel spool of main valve (7) by right rear travel oil pipe, it is characterized by: The controller (1) is electrically connected with a rocker switch (2), the controller (1) is electrically connected with a proportional electromagnetic valve (4), an oil inlet of the proportional electromagnetic valve (4) is communicated with an oil pump of the excavator, first oil outlets of the proportional electromagnetic valve (4) are communicated with left and right rear traveling oil pipes through shuttle valves (5), and second oil outlets of the proportional electromagnetic valve (4) are communicated with left and right front traveling oil pipes through the shuttle valves (5); The rocker switch (2) is three-position self-locking, a middle position of the rocker switch (2) is a manual traveling mode, an upper position of the rocker switch (2) is a forward cruise mode, and a lower position of the rocker switch (2) is a backward traveling mode; The controller (1) is electrically connected with an emergency stop button (3); The cruise keeping method comprises: The user presses the rocker switch (2) to a position corresponding to a cruise direction, the rocker switch (2) gives the controller (1) an electrical signal corresponding to the cruise direction, the user sets the controller (1) by turning on a cruise switch, the controller (1) gives the proportional electromagnetic valve (4) an electrical signal for opening a corresponding oil outlet, the proportional electromagnetic valve (4) receives the electrical signal and outputs hydraulic oil, the hydraulic oil enters the shuttle valve (5) and is injected into a pilot control oil path in the corresponding direction, the pilot control oil path pushes a valve core of a main valve (7) corresponding to traveling, the main valve (7) is opened, and the excavator is driven to travel at a constant speed; The cruise speed adjusting method comprises: The user changes the speed setting of the controller (1) to a corresponding speed, the controller (1) outputs an electrical signal to the proportional electromagnetic valve (4), the proportional electromagnetic valve (4) receives the electrical signal and controls the opening degree of a corresponding valve port to adjust the pressure of the pilot control oil, the pressure of the pilot control oil path is changed to change the opening degree of the valve core of the main valve (7) corresponding to traveling, and the speed of the excavator traveling at a constant speed is changed to the corresponding speed; The emergency stop method of the constant speed cruise comprises: The user presses the emergency stop button (3), the emergency stop button (3) transmits an electrical signal to the controller (1), the controller (1) receives the electrical signal of the emergency stop, the controller (1) sends an emergency stop electrical signal to the proportional electromagnetic valve (4), the proportional electromagnetic valve (4) is depressurized, the valve core of the main valve (7) corresponding to traveling is reset, and the constant speed cruise of the excavator is stopped.

2. The fixed speed cruise control device for excavators according to claim 1, characterized in that: The left rear traveling oil outlet and the first oil outlet are communicated with an oil inlet of a corresponding shuttle valve (5), and an oil outlet of the shuttle valve (5) is communicated with a left traveling valve core, the right rear traveling oil outlet and the first oil outlet are communicated with an oil inlet of a corresponding shuttle valve (5), and an oil outlet of the shuttle valve (5) is communicated with a right traveling valve core, the left front traveling oil pipe and the second oil outlet are communicated with an oil inlet of a corresponding shuttle valve (5), and an oil outlet of the shuttle valve (5) is communicated with a left traveling valve core, and the right front traveling oil pipe and the second oil outlet are communicated with an oil inlet of a corresponding shuttle valve (5), and an oil outlet of the shuttle valve (5) is communicated with a right traveling valve core.

3. The fixed speed cruise control device for excavators according to claim 1, characterized by: The controller (1) is an excavator monitor.

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