PTO automatic disconnection control system linked with electric control lifting

Abstract

The utility model relates to a PTO automatic control system of a tractor, in particular to a PTO automatic disconnection control system linked with electric control lifting, which comprises a main clutch pedal, an auxiliary clutch control system, an oil tank, a gear pump, an electric control lifting electromagnetic valve, a PTO control valve, a controller, a lifting oil cylinder, a PTO oil cylinder and a power supply, the power source is electrically connected with the controller, the gear pump is connected with the electric control lifting electromagnetic valve through an oil way P1 and connected with the PTO control valve through an oil way P2, the electric control lifting electromagnetic valve is connected with the oil tank through an oil way T1 and connected with the lifting oil cylinder, the lifting oil cylinder is in signal connection with the controller, and a travel switch is installed on the auxiliary clutch control system. The travel switch is connected with the controller, the PTO control valve is connected with the controller, the PTOI oil cylinder is connected with the auxiliary clutch control system, and the problems that a power output shaft is broken due to the fact that a machine tool is lifted too high, and a separation bearing is burnt due to the fact that a driver forgets to control an auxiliary clutch are solved.

Description

Technical Field

[0001] The utility model relates to a tractor PTO automatic control system, in particular to a PTO automatic disconnection control system linked with electric control lifting. Background Art

[0002] The current tractor PTO operation is generally mechanical, which has two main problems: 1. When the tractor stops working, turns at the end of the field or other working conditions that require suspending work, the secondary clutch handle needs to be manually operated to ensure that the PTO is disconnected. If the PTO is forgotten to be disconnected, the power output shaft will break due to the height of the machine lifting; 2. When the secondary clutch handle is pulled up for a long time, the secondary clutch is in a disengaged state for a long time, which will cause the release bearing to burn out in the working state, and the clutch spring is always in a stretched state in the non-working static state, and the clutch spring performance is reduced.

[0003] In summary, the present application proposes a PTO automatic disconnection control system linked to electronically controlled lifting, which solves the problem of power output shaft breakage due to excessive lifting of the implement and burning of the release bearing due to the driver forgetting to operate the secondary clutch. Utility Model Content

[0004] The purpose of the utility model is to provide a PTO automatic disconnection control system linked with electric control lifting to solve the problem that if the PTO is forgotten to be disconnected, the power output shaft will be broken due to the lifting height of the machine, and when the secondary clutch handle is pulled up for a long time, the secondary clutch is in a disconnected state for a long time, which will cause the release bearing to burn in the working state, and the clutch spring is always in a stretched state in the non-working static state, and the clutch spring performance is reduced. The technical solution adopted by the utility model is as follows:

[0005] A PTO automatic disconnection control system linked with electric control lifting, including a main clutch pedal and an auxiliary clutch operating system, wherein the main clutch pedal is connected to the auxiliary clutch operating system, and also includes a fuel tank, a gear pump, an electric control lifting solenoid valve, a PTO control valve, a controller, a lifting cylinder, a PTO cylinder and a power supply, wherein the power supply is electrically connected to the controller, the gear pump is connected to the electric control lifting solenoid valve through the P1 oil circuit, and is connected to the PTO control valve through the P2 oil circuit, the electric control lifting solenoid valve is connected to the fuel tank through the T1 oil circuit, the electric control lifting solenoid valve is connected to the lifting cylinder, the lifting cylinder is signal-connected to the controller, a travel switch is installed on the auxiliary clutch operating system, the travel switch is connected to the controller, the PTO control valve is connected to the controller, and the PTO cylinder is connected to the auxiliary clutch operating system.

[0006] It is further limited to include a PTO linkage and hydraulic output panel, a PTO and PTO linkage calibration switch and an electric control lifting panel, wherein the PTO linkage and hydraulic output panel, the PTO and PTO linkage calibration switch and the electric control lifting panel are all connected to the power supply at one end and to the controller at the other end.

[0007] It is further defined that the lifting cylinder is provided with a lifting arm, an angle sensor is provided on the lifting arm, and the angle sensor is connected to the controller signal.

[0008] It is further defined that the electrically controlled lifting solenoid valve includes a first solenoid valve, a second solenoid valve, a third solenoid valve and an electrically controlled overflow valve, the first solenoid valve and the third solenoid valve are both two-position two-way solenoid valves, the second solenoid valve is a three-position four-way solenoid valve, one end of the first solenoid valve is connected to the A port of the second solenoid valve through an oil pipe, and the other end is connected to the lifting cylinder through an oil pipe, the first solenoid valve is provided with a DT3 electromagnet, the P port of the second solenoid valve is connected to the gear pump through the P1 oil circuit, and the T port is connected to the oil tank through the T1 oil circuit, the second solenoid valve is provided with a DT1 electromagnet and a DT2 electromagnet, the P port of the third solenoid valve is connected to the P1 oil circuit, and the T port is connected to the T1 oil circuit, the third solenoid valve is provided with a DT11 electromagnet, the DT1 electromagnet, the DT2 electromagnet, the DT11 electromagnet and the DT3 electromagnet are all connected to the controller, and the electrically controlled overflow valve is connected in parallel to the oil circuit between the third solenoid valve and the gear pump and the oil tank.

[0009] It is further defined that the PTO control valve includes a fourth solenoid valve, a fifth solenoid valve and a logic overflow valve, the fourth solenoid valve is a two-position two-way solenoid valve, the fifth solenoid valve is a two-position three-way solenoid valve, the P port of the fifth solenoid valve is connected to the gear pump through the P2 oil circuit, the T port is connected to the oil tank through the T2 oil circuit, the P port of the fourth solenoid valve is connected to the fifth solenoid valve, the A port is connected to the PTO cylinder, the logic overflow valve is arranged on the P2 oil circuit between the fifth solenoid valve and the gear pump, the fourth solenoid valve is provided with a DT13 electromagnet, the fifth solenoid valve is provided with a DT12 electromagnet, and the DT13 electromagnet and the DT12 electromagnet are both connected to the controller.

[0010] The beneficial effects of the utility model compared with the current technology are:

[0011] 1. On existing models, the electric lifting and PTO electric control valve can be linked, and the automatic disconnection of PTO can be achieved through the controller. Through the position information of the travel switch, the controller determines the time of the secondary clutch disengagement state and emits a buzzer to remind the driver in time.

[0012] 2. It solves the problem of the power output shaft breaking due to the machine being lifted too high, and also solves the problem of the release bearing burning due to the driver forgetting to operate the secondary clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a simple connection relationship of the utility model;

[0014] Figure 2 It is a schematic diagram of components in the electric-controlled lifting solenoid valve of the utility model;

[0015] Figure 3 It is a schematic diagram of the components in the PTO solenoid valve of the utility model.

[0016] The markings in the figure correspond respectively to: 1-main clutch pedal, 2-secondary clutch operating system, 3-gear pump, 4-electrically controlled lifting solenoid valve, 5-PTO solenoid valve, 6-controller, 7-PTO cylinder, 8-power supply, 9-lifting arm, 10-angle sensor, 11-lifting cylinder, 41-first solenoid valve, 42-second solenoid valve, 43-third solenoid valve, 44-electrically controlled overflow valve, 51-fourth solenoid valve, 52-fifth solenoid valve, 53-logic overflow valve, 12-PTO linkage and hydraulic output panel, 13-PTO and PTO linkage calibration switch, 14-electrically controlled lifting panel, 15-travel switch. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the utility model, the technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Example:

[0019] like Figure 1-Figure 3 As shown, a PTO automatic disconnection control system linked with electric control lifting includes a main clutch pedal 1 and an auxiliary clutch control system 2, the main clutch pedal is connected to the auxiliary clutch control 2, and also includes a fuel tank, a gear pump 3, an electric control lifting solenoid valve 4, a PTO control valve 5, a controller 6, a lifting cylinder 7, a PTO cylinder 8 and a power supply 9, the power supply 9 is electrically connected to the controller 6, the lifting cylinder 7 is provided with a lifting arm 9, an angle sensor 10 is provided on the lifting arm 9, the angle sensor 10 is connected to the controller 6 signal, a travel switch is installed on the auxiliary clutch control system 2, the travel switch 15 is connected to the controller 6, and the PTO cylinder 8 is connected to the auxiliary clutch control system 3;

[0020] The electric-controlled lifting solenoid valve 4 includes a first solenoid valve 41, a second solenoid valve 42, a third solenoid valve 43 and an electric-controlled overflow valve 44. The first solenoid valve 41 and the third solenoid valve 43 are both two-position two-way solenoid valves, and the second solenoid valve 42 is a three-position four-way solenoid valve. One end of the first solenoid valve 41 is connected to the A port of the second solenoid valve 42 through an oil pipe, and the other end is connected to the lifting cylinder 11 through an oil pipe. The first solenoid valve 41 is provided with a DT3 electromagnet, which is connected to the controller 6. The P of the second solenoid valve 42 The P port is connected to the gear pump 3 through the P1 oil circuit, the T port is connected to the oil tank through the T1 oil circuit, the second solenoid valve 42 is provided with a DT1 electromagnet and a DT2 electromagnet, and the DT1 electromagnet and the DT2 electromagnet are connected to the controller 6, the P port of the third solenoid valve 43 is connected to the P1 oil circuit, the T port is connected to the T1 oil circuit, the third solenoid valve 43 is provided with a DT11 electromagnet, and the DT1 electromagnet is connected to the controller 6, and the electronically controlled overflow valve 44 is connected in parallel to the oil circuit between the third solenoid valve 43 and the gear pump 3 and the oil tank;

[0021] The PTO control valve 5 includes a fourth solenoid valve 51, a fifth solenoid valve 52 and a logic relief valve 53. The fourth solenoid valve 5 is a two-position two-way solenoid valve, the fifth solenoid valve 52 is a two-position three-way solenoid valve, the P port of the fifth solenoid valve 52 is connected to the gear pump 3 through the P2 oil circuit, the T port is connected to the oil tank through the T2 oil circuit, the P port of the fourth solenoid valve 51 is connected to the fifth solenoid valve 52, the A port is connected to the PTO cylinder 7, the logic relief valve 53 is arranged on the P2 oil circuit between the fifth solenoid valve 52 and the gear pump 3, the fourth solenoid valve 51 is provided with a DT13 electromagnet, the fifth solenoid valve 52 is provided with a DT12 electromagnet, and the DT13 electromagnet and the DT12 electromagnet are both connected to the controller 6;

[0022] It also includes a PTO linkage and hydraulic output panel 12, a PTO and PTO linkage calibration switch 13 and an electric control lifting panel 14. The PTO linkage and hydraulic output panel 12, the PTO and PTO linkage calibration switch 13 and the electric control lifting panel 14 are all connected to the power supply 8 at one end and to the controller 6 at the other end.

[0023] When in use, the power supply 8 provides power to the controller 6, and the gear pump 3 provides power. The electronically controlled lifting solenoid valve 4 controls the action of the lifting cylinder 11, and the lifting cylinder 11 manipulates the lifting arm 9 to realize the lifting operation of the machine. The angle sensor 10 on the lifting arm 9 is used to detect the lifting angle of the lifting arm 9 and transmit the information to the controller 6. The PTO control valve 5 controls the action of the PTO cylinder 7 to manipulate the secondary clutch control system 2 to realize the separation of the secondary clutch. The travel switch 15 detects the position information of the separation rocker arm of the secondary clutch control system 2 and transmits the information to the controller 6. When the machine is raised to the set height, the controller 6 manipulates the secondary clutch through the PTO control valve 5 to realize separation. When the secondary clutch is separated for a long time, the controller 6 uses the position information of the travel switch 15, combined with the set time, to sound an alarm to remind the driver to manipulate the secondary clutch. The PTO linkage and hydraulic output panel 12, the PTO and PTO linkage calibration switch 13 and the electronically controlled lifting panel 14 are used to display the current state and control the electronically controlled lifting control valve 4 and the PTO control valve 5.

[0024] The following table is an action sequence table of the first solenoid valve 41 to the fifth solenoid valve 52, including the electromagnet power-on state of the PTO cylinder 7 and the lifting cylinder 11 in each state:

[0025]

[0026] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "middle", "upper", "lower", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The above is a detailed introduction to a PTO automatic disconnection control system linked to an electric-controlled lift provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the utility model, several improvements and modifications can be made to the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A PTO automatic disconnection control system linked with an electronically controlled lift, comprising a main clutch pedal (1) and a secondary clutch operating system (2), wherein the main clutch pedal (1) and the secondary clutch operating system (2) are connected, and characterized in that: The invention also includes an oil tank, a gear pump (3), an electrically controlled lifting solenoid valve (4), a PTO control valve (5), a controller (6), a lifting cylinder (11), a PTO cylinder (7) and a power supply (8). The power supply (8) is electrically connected to the controller (6). The gear pump (3) is connected to the electrically controlled lifting solenoid valve (4) via a P1 oil circuit and is connected to the PTO control valve (5) via a P2 oil circuit. The electrically controlled lifting solenoid valve (4) is connected to the oil tank via a T1 oil circuit. The electrically controlled lifting solenoid valve (4) is connected to the lifting cylinder (11). The lifting cylinder (11) is signal-connected to the controller (6). A travel switch is installed on the secondary clutch control system. The travel switch is connected to the controller. The PTO control valve is connected to the controller. The PTO cylinder is connected to the secondary clutch control system.

2. A PTO automatic disconnection control system linked with electric control lifting according to claim 1, characterized in that: It also includes a PTO linkage and hydraulic output panel (12), a PTO and PTO linkage calibration switch (13) and an electric control lifting panel (14), wherein the PTO linkage and hydraulic output panel (12), the PTO and PTO linkage calibration switch (13) and the electric control lifting panel (14) are all connected to the power supply (8) at one end and connected to the controller (6) at the other end.

3. A PTO automatic disconnection control system linked with electric control lifting according to claim 1, characterized in that: The lifting cylinder (11) is provided with a lifting arm (9), and an angle sensor (10) is provided on the lifting arm (9). The angle sensor (10) is signal-connected to the controller (6).

4. A PTO automatic disconnection control system linked with electric control lifting according to claim 1, characterized in that: The electrically controlled lifting solenoid valve (4) comprises a first solenoid valve (41), a second solenoid valve (42), a third solenoid valve (43) and an electrically controlled overflow valve (44); the first solenoid valve (41) and the third solenoid valve (43) are both two-position two-way solenoid valves; the second solenoid valve (42) is a three-position four-way solenoid valve; one end of the first solenoid valve (41) is connected to the A port of the second solenoid valve (42) through an oil pipe, and the other end is connected to the lifting cylinder (11) through an oil pipe; the first solenoid valve (41) is provided with a DT3 electromagnet; the P port of the second solenoid valve (42) is connected to the gear The wheel pump (3) is connected via the P1 oil circuit, and the T port is connected to the oil tank via the T1 oil circuit. The second solenoid valve (42) is provided with a DT1 electromagnet and a DT2 electromagnet. The P port of the third solenoid valve (43) is connected to the P1 oil circuit, and the T port is connected to the T1 oil circuit. The third solenoid valve (43) is provided with a DT11 electromagnet. The DT1 electromagnet, the DT2 electromagnet, the DT11 electromagnet and the DT3 electromagnet are all connected to the controller (6). The electrically controlled overflow valve (44) is connected in parallel to the oil circuit between the third solenoid valve (43) and the gear pump (3) and the oil tank.

5. A PTO automatic disconnection control system linked with electric control lifting according to claim 1, characterized in that: The PTO control valve (5) comprises a fourth solenoid valve (51), a fifth solenoid valve (52) and a logic overflow valve (53). The fourth solenoid valve (51) is a two-position two-way solenoid valve, and the fifth solenoid valve (52) is a two-position three-way solenoid valve. The P port of the fifth solenoid valve (52) is connected to the gear pump (3) via the P2 oil circuit, and the T port is connected to the oil tank via the T2 oil circuit. The P port of the fourth solenoid valve (51) is connected to the fifth solenoid valve (52), and the A port is connected to the PTO cylinder (7). The logic overflow valve (53) is arranged on the P2 oil circuit between the fifth solenoid valve (52) and the gear pump (3). The fourth solenoid valve (51) is provided with a DT13 electromagnet, and the fifth solenoid valve (52) is provided with a DT12 electromagnet. Both the DT13 electromagnet and the DT12 electromagnet are connected to the controller (6).

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