CN103303140A - Double-H operated power takeoff electrical control system capable of carrying out traveling power take-off and use method of electrical control system - Google Patents

Abstract

The power take-off electric control system controlled by double H that can drive the power to take off, the air storage tank included in it communicates with the air inlet of the power take-off after passing through the power take-off solenoid valve and the high-grade shielding valve in turn, and at the same time, the air storage tank passes through the parking electromagnetic valve in turn. The valve and the middle cylinder are connected to the double H valve in the double H control system of the rear auxiliary box, and the power take-off switch and the low gear control switch are connected in series on the coil of the power take-off solenoid valve, and the parking switch is connected in series on the coil of the parking solenoid valve. switch; when taking power while driving, use the low-gear control switch to ensure that the vehicle can only take power when it is in a low gear; when parking power, use the parking switch to make the vehicle in neutral and close the low-gear control switch to turn on the power take-off solenoid valve, thereby Stop power. This design can not only avoid the phenomenon of sudden lifting, but also can take power safely while driving and parking.

Description

Power take-off electric control system with double H control and its application method

technical field

The invention relates to a power take-off control system of a dump truck, in particular to an electronic control system of a power take-off operated by a vehicle capable of taking power with double H and its use method, which is particularly suitable for avoiding sudden lifting phenomenon, and can be safely The driving force is taken off, and the power is taken off when parking.

Background technique

At present, it often occurs in China that dump trucks are suddenly automatically lifted while driving, so that they hit obstacles. This phenomenon often leads to serious traffic accidents, resulting in huge economic losses, and even car crashes. Although many OEMs and refitting factories have put forward different preventive measures, none of them can solve such problems fundamentally.

The Chinese patent authorization announcement number is CN2837570Y, and the utility model patent whose authorization announcement date is November 15, 2006 discloses an air control device for a hydraulic dumping mechanism of a dump vehicle. The air control device includes: an air storage tank, a control valve, Hydraulic cylinder, reversing valve, fuel tank, power take-off cylinder and gear pump with one-way valve. The control valve is a three-position four-way reversing valve with air port A, air port B, air port P and air port T. The air port P communicates with the air storage tank, the air port T communicates with the outside world, the air port A communicates with the reversing valve, and the air port B communicates with the power take-off cylinder, and the power take-off cylinder, the gear pump, and the changer The valve, the hydraulic cylinder and the oil tank are connected through an oil circuit, wherein a safety pilot valve is also arranged between the air reservoir and the air port P of the pilot valve. Although this utility model has improved the safety of its use by the mode that a safety control valve is set between the air reservoir and the control valve, it still has the following defects:

First of all, this utility model summarizes the cause of the sudden lifting phenomenon as misoperation, so what it solves is only the sudden lifting phenomenon caused by misoperation while driving. , can only realize the power take-off when parking, therefore, it does not fundamentally solve this kind of problem, and it cannot ensure safe driving power take-off;

Secondly, this utility model needs to install a safety control valve between the air storage tank and the control valve. This safety control valve will not only increase the cost, but also affect the overall layout of the parts. In addition, it only plays a similar double insurance role. , can only prevent misoperation when driving, and cannot fundamentally solve the sudden lifting phenomenon, the cost performance is not high, and the practicability is low.

Contents of the invention

The purpose of the present invention is to overcome the defects and problems existing in the prior art that cannot ensure safe driving power taking and low practicability, and provide a driving driving power taking device that can ensure safe driving power and have high practicability. An electric control system for a power take-off controlled by double H and its application method.

In order to achieve the above objectives, the technical solution of the present invention is: the electric control system of the power take-off controlled by the double H that can drive the power to take off, including the air storage tank and the power take-off, and the air storage tank is connected with the power take-off after passing through the power take-off solenoid valve. The air inlet of the power take-off is connected, the output shaft of the power take-off is connected with the gear pump, and a power take-off switch is connected in series on the coil of the power take-off solenoid valve;

A low gear control switch is also connected in series on the circuit where the power take-off solenoid valve coil and the power take-off switch are co-located;

The air reservoir is connected to the double H valve air circuit in the double H control system of the rear auxiliary box through the parking solenoid valve and the middle cylinder in sequence, and a parking switch is connected in series on the coil of the parking solenoid valve.

The double H control system of the rear auxiliary box includes a double H valve and a pressure limiting valve;

The air storage tank communicates with the air inlet of the middle cylinder through the parking solenoid valve, the high-grade air outlet of the middle cylinder communicates with the air inlet of the double H valve, the low-grade air outlet of the middle cylinder communicates with the air outlet of the double H valve, and the double H valve air outlet communicates with each other. The air outlet of the H valve communicates with the air storage tank after passing through the pressure limiting valve.

The air storage tank communicates with the air inlet of the power take-off after passing through the power take-off electromagnetic valve and the high-grade shielding valve successively.

The vehicle used by the power take-off electric control system has five gears in total, which are 1st gear, 2nd gear, 3rd gear, 4th gear, and 5th gear; the low gear in the low gear control switch refers to R gear, 1 gear, 2nd gear or neutral.

A method of using the electronic control system of the above-mentioned double H-operated power take-off that can be driven by a vehicle, and the method of use includes the following steps:

Drive power take-off steps: first press the power take-off switch, then adjust the gear to the low gear to close the low gear control switch, so as to conduct the circuit where the power take-off solenoid valve coil is located, the coil of the power take-off solenoid valve is energized, and the power take-off solenoid The valve is opened, at this time, the compressed air in the air reservoir enters the rod chamber of the power take-off control cylinder after passing through the power take-off solenoid valve, and the compressed air pushes the power take-off gear of the power take-off and the power gear in the rear auxiliary box of the transmission Mesh with each other to make the power take-off powerful, and the output shaft of the powerful power take-off drives the gear pump to run to drive the hydraulic system to lift, lower and stop the vehicle, so as to realize the power take-off when driving;

Power take-off steps when parking: first press the parking switch, the circuit where the parking solenoid valve coil is located is turned on, the parking solenoid valve coil is energized, and the parking solenoid valve is opened. At this time, the compressed air in the air storage tank passes through the parking solenoid valve, After the neutral cylinder enters the double H valve in the double H control system of the rear auxiliary box to disconnect the connection between the output end and the transmission shaft in the rear auxiliary box of the transmission, the transmission shaft stops rotating, the vehicle stops, and the vehicle is in neutral. The low gear control switch is closed, and then the power take-off switch is pressed, so as to conduct the circuit where the power take-off solenoid valve coil is located, the coil of the power take-off solenoid valve is energized, and the power take-off solenoid valve is opened. After the power take-off solenoid valve enters the rod cavity of the power take-off control cylinder, the compressed air pushes the power take-off gear of the power take-off to mesh with the power gear in the rear auxiliary box of the transmission to make the power take-off effective. The output shaft drives the gear pump to run to drive the hydraulic system to lift, lower and stop the vehicle, so as to realize the stop power.

The low gear position control switch is controlled to be closed by a transverse shift lever.

The air storage tank communicates with the air inlet of the power take-off after passing through the power take-off electromagnetic valve and the high-grade shielding valve successively.

Compared with prior art, the beneficial effect of the present invention is:

1. In the electric control system of the double-H control power take-off capable of vehicle power take-off and its use method in the present invention, there is a low gear control switch connected in series on the circuit where the power take-off solenoid valve coil and the power take-off switch are co-located. When in use, Only when the low gear control switch and the power take-off switch are closed at the same time, can the power take-off solenoid valve be opened to conduct the air circuit where the power take-off is located, effectively avoiding the sudden lifting phenomenon caused by the misoperation of the power take-off switch; moreover, the low gear control The switch can only be closed when the vehicle is in a low gear, which can avoid the automatic lifting phenomenon caused by high oil pressure when the car is in a high gear, such as when the transmission is in 4th or 5th gear; in addition, the design is to maintain driving force On the basis of solving the sudden lifting phenomenon. Therefore, the present invention can not only avoid the phenomenon of sudden lifting, but also can take power safely while driving.

2. The electric control system of the power take-off controlled by the double H that can be used to take power by the vehicle and its use method in the present invention, the air storage tank passes through the parking solenoid valve, the middle cylinder, and the double H valve in the double H control system of the rear auxiliary box in sequence. The air circuit is connected, and a parking switch is connected in series on the coil of the parking solenoid valve. When in use, this design conducts the parking solenoid valve through the parking switch to disconnect the connection between the output terminal and the transmission shaft in the rear auxiliary box of the transmission, so that the vehicle In neutral, and close the low gear control switch, so as to realize the synchronization of parking and power taking, and avoid the occurrence of sudden lifting phenomenon. Therefore, the present invention can not only take power safely while driving, but also can take power safely when parking.

3. In the electric control system of double H control power take-off capable of vehicle power take-off and its use method in the present invention, a high-grade shielding valve is set between the power take-off solenoid valve and the air inlet of the power take-off, and the high-grade shielding valve can not only The high-end is shielded, so that driving power can only be realized in the low-range area, and the direct connection between the power-taking solenoid valve and the air storage tank can be avoided, so as to prevent the sudden movement caused by the long-term ventilation of the power-taking solenoid valve. rising phenomenon. Therefore, the present invention can effectively avoid the sudden lifting phenomenon when the vehicle is running.

4. In the electric control system of the double-H control power take-off capable of vehicle power take-off and its use method in the present invention, a low gear control switch is added to the circuit where the power take-off solenoid valve coil and the power take-off switch co-exist, so as to realize In addition, if a high-grade shielding valve is set between the power take-off solenoid valve and the air inlet of the power take-off, the safety will be stronger. In addition, the low-grade position control switch and the high-grade shielding valve not only The price is low, and the volume is small, it will not affect the overall layout of the parts, the cost performance is high, and the practicability is strong. Therefore, the present invention can not only safely take power while driving and parking, but also has strong practicability.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the figure: air storage tank 1, power take-off device 2, power take-off solenoid valve 3, power take-off switch 4, low gear control switch 5, horizontal shift lever 51, parking solenoid valve 6, middle position cylinder 7, high-grade air outlet 71, Low-grade air outlet 72, double H valve 8, double H valve inlet 81, double H valve outlet 82, double H valve air outlet 83, parking switch 9, pressure limiting valve 11, high-grade shielding valve 13, rear auxiliary box double H control system 14.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 , the power take-off electric control system operated by double H for vehicle power take-off includes an air storage tank 1 and a power take-off device 2, and the air storage tank 1 is connected to the air intake of the power take-off device 2 after passing through the power take-off solenoid valve 3 The output shaft of the power take-off 2 is connected with the gear pump, and the power take-off switch 4 is connected in series on the coil of the power take-off solenoid valve 3;

The coil of the power take-off solenoid valve 3 and the power take-off switch 4 are also connected in series with a low gear control switch 5;

The air reservoir 1 is connected to the double H valve 8 in the double H control system 14 of the rear auxiliary box through the parking solenoid valve 6 and the middle cylinder 7 in sequence, and the parking switch 9 is connected in series on the coil of the parking solenoid valve 6 .

The rear auxiliary tank double H control system 14 includes a double H valve 8 and a pressure limiting valve 11;

The air storage tank 1 communicates with the air inlet of the middle cylinder 7 through the parking solenoid valve 6, the high-grade air outlet 71 of the middle cylinder 7 communicates with the double H valve air inlet 81, and the low-grade air outlet 72 of the middle cylinder 7 communicates with the air inlet 81 of the double H valve. The air outlet 83 of the double H valve communicates with each other, and the air outlet 82 of the double H valve communicates with the air storage tank 1 after passing through the pressure limiting valve 11 .

Described air reservoir 1 communicates with the air inlet of power take-off 2 after power take-off electromagnetic valve 3, high-grade shielding valve 13 successively, and the coil of high-grade shielding valve 13 is all communicated with low-grade air outlet 72, double H valve venting port 83.

The vehicle used by the power take-off electric control system has five gears in total, which are respectively 1st gear, 2nd gear, 3rd gear, 4th gear, and 5th gear; the low gear in the low gear control switch 5 refers to R gear, 1st gear, 2nd gear or neutral.

A method of using the electronic control system of the above-mentioned double H-operated power take-off that can be driven by a vehicle, and the method of use includes the following steps:

Drive power take-off steps: first press the power take-off switch 4, then adjust the gear to the low gear to close the low gear control switch 5, so as to conduct the circuit where the coil of the power take-off solenoid valve 3 is located, and the coil of the power take-off solenoid valve 3 is energized , the power take-off solenoid valve 3 is opened, at this time, the compressed air in the air storage tank 1 enters the rod cavity of the control cylinder of the power take-off 2 after passing through the power take-off solenoid valve 3, and the compressed air pushes the power take-off gear of the power take-off 2 Mesh with the power gear in the rear auxiliary box of the transmission to make the power take-off 2 effective, and the output shaft of the powerful power take-off 2 drives the gear pump to run to drive the hydraulic system to lift, lower and stop the vehicle, thereby realizing driving force;

Power take-off steps when parking: first press the parking switch 9, the circuit where the parking solenoid valve 6 coil is located is turned on, the coil of the parking solenoid valve 6 is energized, and the parking solenoid valve 6 is opened. At this time, the compressed air in the air storage tank 1 is sequentially After passing through the parking solenoid valve 6 and the middle cylinder 7, it enters the double H valve 8 in the double H control system 14 of the rear auxiliary box to disconnect the connection between the output end and the transmission shaft in the rear auxiliary box of the transmission, the transmission shaft stops rotating, and the vehicle Stop, the vehicle is in neutral, the low gear control switch 5 is closed, and then the power take-off switch 4 is pressed to conduct the circuit where the coil of the power take-off solenoid valve 3 is located, the coil of the power take-off solenoid valve 3 is energized, and the power take-off solenoid valve 3 is opened, at this time, the compressed air in the air reservoir 1 enters the rod cavity of the control cylinder of the power take-off 2 after passing through the power take-off solenoid valve 3, and the compressed air pushes the power take-off gear of the power take-off 2 and the rear auxiliary box of the transmission The power gears in the motor are meshed to make the power take-off 2 powerful, and the output shaft of the powerful power take-off 2 drives the gear pump to drive the hydraulic system to lift, lower and stop the vehicle, so as to realize power take-off when parking.

The low gear control switch 5 is controlled to be closed by the transverse shift lever 51 .

The air storage tank 1 communicates with the air inlet of the power take-off device 2 after passing through the power take-off solenoid valve 3 and the high-grade shielding valve 13 in sequence.

Principle of the present invention is described as follows:

In China, it often happens that construction dump trucks are automatically lifted when driving at high speed and hit obstacles. This is often accompanied by serious traffic accidents, and even car crashes, resulting in huge economic losses. The faulty vehicle is mostly matched with a double countershaft transmission, which takes power from the rear sub-box countershaft, and the power take-off control system responsible for taking power from the rear sub-box countershaft usually uses a power take-off switch to control the power take-off solenoid valve, so as to Realize power take-off when driving, and each gear of the vehicle can realize power take-off function while driving. But this kind of system has security risks:

The hydraulic system (hydraulic system that controls the lifting, lowering and stopping of the vehicle) of this system has a long hydraulic pipeline and a small diameter. When the speed of the power take-off is high ), even if the lifting control handle is in the lowered position, the oil cylinder will automatically jack up, resulting in a sudden lifting phenomenon, which poses a great safety hazard; in addition, the solenoid valve of the power take-off and the air storage tank in the existing control system are directly connected, Once the solenoid valve of the power take-off fails, such as the power take-off switch is connected in series, the power take-off will have a long ventilation situation. At this time, the power take-off will automatically work, and sudden lifting is prone to occur.

For the above defects, there are many announced solutions, but none of them can ensure safe driving force taking and parking power taking. The control of the power source (power take-off) solves the above defects, not only can avoid the occurrence of sudden lifting phenomenon, but also can take power safely while driving and parking, with high cost performance and strong practicability.

Example 1:

An electrical control system for double H-controlled power take-offs capable of vehicle power take-off, including an air reservoir 1, a power take-off 2, a power take-off solenoid valve 3, a power take-off switch 4, a low gear control switch 5, a parking solenoid valve 6, The middle cylinder 7, the stop switch 9, the high-grade shielding valve 13 and the double H control system 14 of the rear auxiliary box, the double H control system 14 of the rear auxiliary box includes the double H valve 8 and the pressure limiting valve 11;

The air storage tank 1 communicates with the air inlet of the power take-off 2 through the power take-off solenoid valve 3 and the high-grade shielding valve 13 in turn (the air inlet of the power take-off 2 communicates with the rod cavity of the control cylinder of the power take-off 2 ), the output shaft of the power take-off 2 is connected with the gear pump; the air reservoir 1 communicates with the air inlet of the middle cylinder 7 through the parking solenoid valve 6, and the high-grade air outlet 71 of the middle cylinder 7 is connected with the double H valve. The air port 81 communicates, the low-grade air outlet 72 of the middle cylinder 7 communicates with the double H valve air outlet 83, and the double H valve air outlet 82 communicates with the air storage tank 1 after the pressure limiting valve 11;

A power take-off switch 4 and a low gear control switch 5 are connected in series on the coil of the power take-off solenoid valve 3; a stop switch 9 is connected in series on the coil of the parking solenoid valve 6; The air outlet 72 and the double H valve air outlet 83 are all connected (the opening and closing of the high-grade shielding valve 13 is controlled by the air from the low-end air outlet 72, it is connected when there is air in the pipeline, and it is disconnected by a spring when the air is cut off);

The vehicle used by the power take-off electric control system has five gears in total, which are respectively 1st gear, 2nd gear, 3rd gear, 4th gear, and 5th gear; the low gear in the low gear control switch 5 refers to R gear, 1st gear, 2nd gear or neutral.

A method of using the electronic control system of the above-mentioned double H-operated power take-off that can be driven by a vehicle, and the method of use includes the following steps:

Driving power take-off steps: first press the power take-off switch 4, then adjust the gear to the low gear to close the low gear control switch 5 (the low gear control switch 5 is closed by the lateral shift lever 51), so as to turn on the power take-off The circuit where the coil of the power solenoid valve 3 is located, the coil of the power take-off solenoid valve 3 is energized, and the power take-off solenoid valve 3 is opened. At this time, the compressed air in the air storage tank 1 enters through the power take-off solenoid valve 3 and the high-grade shielding valve 13 in turn. In the rod cavity of the power take-off 2 control cylinder, the compressed air pushes the power take-off gear of the power take-off 2 to mesh with the power gear in the rear sub-box of the transmission to make the power take-off 2 effective, and the output of the effective power take-off 2 The shaft drives the gear pump to run to drive the hydraulic system to lift, lower and stop the vehicle, so as to realize driving power;

Power take-off steps when parking: first press the parking switch 9, the circuit where the parking solenoid valve 6 coil is located is turned on, the coil of the parking solenoid valve 6 is energized, and the parking solenoid valve 6 is opened. At this time, the compressed air in the air storage tank 1 is sequentially After passing through the parking solenoid valve 6 and the middle cylinder 7, it enters the double H valve 8 in the double H control system 14 of the rear auxiliary box to disconnect the connection between the output end and the transmission shaft in the rear auxiliary box of the transmission, the transmission shaft stops rotating, and the vehicle Stop, the vehicle is in neutral, the low gear control switch 5 is closed, and then the power take-off switch 4 is pressed to conduct the circuit where the coil of the power take-off solenoid valve 3 is located, the coil of the power take-off solenoid valve 3 is energized, and the power take-off solenoid valve 3 is opened, at this time, the compressed air in the air storage tank 1 enters the rod cavity of the control cylinder of the power take-off 2 through the power take-off solenoid valve 3 and the high-grade shielding valve 13 in turn, and the compressed air pushes the power take-off of the power take-off 2 The gear meshes with the power gear in the rear auxiliary box of the transmission to make the power take-off 2 effective. The output shaft of the powerful power take-off 2 drives the gear pump to run to drive the hydraulic system to lift, lower and stop the vehicle. Realize parking power take-off. the

Claims (7)

1. the power takeoff electric-control system that the two H of power taking of can driving a vehicle handle, comprise air tank (1) and power takeoff (2), described air tank (1) communicates with the admission port of power takeoff (2) behind power taking electromagnetic valve (3), the output shaft of power takeoff (2) is connected with gear type pump, and the coil at power taking electromagnetic valve (3) is in series with power taking switch (4), it is characterized in that:

Described power taking electromagnetic valve (3) coil, power taking switch (4) altogether circuit on also be in series with a low-grade location master cock (5);

Described air tank (1) is connected with double H valve (8) gas circuit in the two H control system (14) of rear odd-side behind parking electromagnetic valve (6), meta cylinder (7) successively, and is in series with shut off cock (9) at the coil of electromagnetic valve for braking (6).

2. the power takeoff electric-control system handled of the two H of the power taking of driving a vehicle according to claim 1 is characterized in that:

The two H control system (14) of described rear odd-side comprise double H valve (8) and limiting valve (11);

Described air tank (1) communicates through the admission port of parking electromagnetic valve (6) with meta cylinder (7), the high-grade air extractor duct (71) of meta cylinder (7) communicates with double H valve admission port (81), the low-grade air extractor duct (72) of meta cylinder (7) communicates with double H valve relief port (83), and double H valve air extractor duct (82) communicates with air tank (1) behind limiting valve (11).

3. the power takeoff electric-control system handled of the two H of the power taking of driving a vehicle according to claim 2 is characterized in that:

Described air tank (1) communicates with the admission port of power takeoff (2) behind power taking electromagnetic valve (3), high-grade shielding valve (13) successively, and the coil of high-grade shielding valve (13) all communicates with low-grade air extractor duct (72), double H valve relief port (83).

4. according to claim 1, the power takeoff electric-control system handled of the two H of the 2 or 3 described power takings of driving a vehicle, it is characterized in that: the applied vehicle one of described power takeoff electric-control system has five grades, is respectively 1 grade, 2 grades, 3 grades, 4 grades, 5 grades; Low-grade location in the described low-grade location master cock (5) refers to R shelves, 1 grade, 2 grades or neutral gear.

5. the using method of the power takeoff electric-control system handled of the two H of the power taking of driving a vehicle claimed in claim 1 is characterized in that described using method may further comprise the steps:

Driving power taking step: press first power taking switch (4), again gear is transferred to low-grade location with closed low-grade location master cock (5), thereby conducting power taking electromagnetic valve (3) coil place circuit, the coil of power taking electromagnetic valve (3) gets electric, power taking electromagnetic valve (3) is opened, at this moment, pressurized air in the air tank (1) enters in the rod chamber of power takeoff (2) control cylinder behind power taking electromagnetic valve (3), power gear behind the power take-off gear that pressurized air promotes power takeoff (2) and the change-speed box in the odd-side is meshed so that power takeoff (2) is capable, the output shaft driven gear pump running of capable power takeoff (2) is carried out the lifting of vehicle with drive hydraulic system principle, descend with in stop operation, thereby realize the driving power taking;

Force taking of parking step: press first shut off cock (9), electromagnetic valve for braking (6) coil place circuit is switched on, the coil of electromagnetic valve for braking (6) gets electric, electromagnetic valve for braking (6) is opened, at this moment, pressurized air in the air tank (1) is successively through parking electromagnetic valve (6), enter behind the meta cylinder (7) double H valve (8) in the two H control system (14) of rear odd-side with the open slew device after mouth in the odd-side, connection between the transmission shaft, transmission shaft stops operating, vehicle stop is motionless, vehicle is in neutral gear, low-grade location master cock (5) closure, press again power taking switch (4), thereby conducting power taking electromagnetic valve (3) coil place circuit, the coil of power taking electromagnetic valve (3) gets electric, power taking electromagnetic valve (3) is opened, at this moment, pressurized air in the air tank (1) enters in the rod chamber of power takeoff (2) control cylinder behind power taking electromagnetic valve (3), power gear behind the power take-off gear that pressurized air promotes power takeoff (2) and the change-speed box in the odd-side is meshed so that power takeoff (2) is capable, the output shaft driven gear pump running of capable power takeoff (2) is carried out the lifting of vehicle with drive hydraulic system principle, descend with in stop operation, thereby realize force taking of parking.

6. the using method of the power takeoff electric-control system handled of the two H of a kind of power taking of driving a vehicle according to claim 5, it is characterized in that: described low-grade location master cock (5) is closed by horizontal gear level (51) control.

7. according to claim 5 or the using method of the power takeoff electric-control system handled of the two H of 6 described a kind of power takings of driving a vehicle, it is characterized in that: described air tank (1) communicates with the admission port of power takeoff (2) behind power taking electromagnetic valve (3), high-grade shielding valve (13) successively.

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