CN217328206U

CN217328206U - Clutch proportional control and lubricating valve group

Info

Publication number: CN217328206U
Application number: CN202220212464.9U
Authority: CN
Inventors: 郭鹏
Original assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Current assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-08-30
Anticipated expiration: 2032-01-26

Abstract

The utility model discloses a clutch proportional control and lubrication valve group, including the valve block, be equipped with P hydraulic fluid port, T hydraulic fluid port, F hydraulic fluid port, R hydraulic fluid port, G hydraulic fluid port and PTO hydraulic fluid port on the valve block, the oil inlet of first electronic proportional valve, second electronic proportional valve, third electronic proportional valve is connected with first oil inlet way respectively, the oil return opening is connected with the oil drainage way respectively, the output hydraulic fluid port and the F hydraulic fluid port of first electronic proportional valve are connected, the output hydraulic fluid port and the R hydraulic fluid port of third electronic proportional valve are connected; an overflow valve is installed in the valve block, an oil inlet of the overflow valve is connected with the oil port P, an oil outlet of the overflow valve is connected to the second oil inlet path, an oil return port of the overflow valve is connected to the oil discharge path, oil inlets of the first hydraulic control reversing valve and the second hydraulic control reversing valve are respectively connected to the second oil inlet path, and oil outlets of the first hydraulic control reversing valve and the second hydraulic control reversing valve are connected to the oil port G in parallel and used for controlling lubrication of the clutch. The slow closing of the clutch is realized, so that the impact at the closing moment is weakened, a driver feels more comfortable, and the service life of the clutch is prolonged.

Description

Clutch proportional control and lubricating valve group

Technical Field

The utility model relates to a hydrovalve technical field specifically is a clutch proportional control and lubricated valves.

Background

The clutch is arranged in a flywheel casing between the engine and the gearbox, when the vehicle starts and shifts gears in a running mode, a driver can press or release a clutch pedal according to needs, so that the engine and the gearbox are temporarily separated and gradually connected, and the power input by the engine to the gearbox is cut off or transmitted. The clutch that tractor adopted in the existing market is mechanical type mostly, though has hydraulic pressure helping hand function a bit, nevertheless inevitable can produce the impact when starting, brings the discomfort for the navigating mate, and the aggravation clutch damages, probably can lead to the engine to flame out.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a clutch proportional control and lubricated valves to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a clutch proportional control and lubrication valve set comprises a valve block, wherein a P oil port, a T oil port, an F oil port, an R oil port, a G oil port and a PTO oil port are arranged on the valve block, a first electric proportional valve, a second electric proportional valve and a third electric proportional valve are respectively installed in the valve block, the valve block is provided with a first oil inlet channel communicated with the P oil port and an oil discharge channel communicated with the T oil port, oil inlets of the first electric proportional valve, the second electric proportional valve and the third electric proportional valve are respectively connected with the first oil inlet channel, oil return ports are respectively connected with the oil discharge channel, an output oil port of the first electric proportional valve is connected with the F oil port and used for controlling the forward movement of a clutch, and an output oil port of the third electric proportional valve is connected with the R oil port and used for controlling the backward movement of the clutch;

an overflow valve is installed in the valve block, an oil inlet of the overflow valve is connected with the oil port P, an oil outlet of the overflow valve is connected to the second oil inlet path, an oil return port of the overflow valve is connected to the oil discharge path, a first hydraulic control reversing valve and a second hydraulic control reversing valve are installed in the valve block respectively, oil inlets of the first hydraulic control reversing valve and the second hydraulic control reversing valve are connected to the second oil inlet path respectively, and oil outlets of the first hydraulic control reversing valve and the second hydraulic control reversing valve are connected to the oil port G in parallel and used for controlling lubrication of the clutch.

Preferably, the second electric proportional valve and the PTO port are used for controlling the output torque of the engine.

Preferably, a control oil port of the first hydraulic control reversing valve is connected to an output oil port of the first electric proportional valve, and a control oil port of the second hydraulic control reversing valve is connected to an output oil port of the third electric proportional valve.

Preferably, the second oil inlet path and the oil drainage path are connected with a check valve, and oil in the second oil inlet path can enter the oil drainage path through the check valve.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses with the action of marcing forward and retreating of first electronic proportional valve, the electronic proportional valve of third control clutch respectively, through the pressure that control got into the clutch, realize the slow closure of clutch to weaken closed impact in the twinkling of an eye, improve navigating mate's travelling comfort, prolonged clutch life. The lubricating oil of the clutch flows into the clutch in a closed mode, and the lubricating oil does not enter the clutch in a disengaged state, so that idling of the clutch is avoided.

Drawings

Fig. 1 is a schematic diagram of the oil circuit principle of the present invention.

In the figure: 1. a valve block; 2. an overflow valve; 3. a first electrically operated proportional valve; 4. a second electrically operated proportional valve; 5. a third electrically operated proportional valve; 6. a first hydraulic control directional control valve; 7. a second hydraulic control directional control valve; 8. a first oil inlet path; 9. an oil discharge passage; 10. a second oil inlet path; 11. a one-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a clutch proportional control and lubricated valves, includes valve block 1, is equipped with the P hydraulic fluid port on the valve block 1, the T hydraulic fluid port, the F hydraulic fluid port, the R hydraulic fluid port, G hydraulic fluid port and PTO hydraulic fluid port, install first electronic proportional valve 3 in the valve block 1 respectively, second electronic proportional valve 4 and third electronic proportional valve 5, three electronic proportional valve is two three-way valves, and the oil inlet is the normal close, valve block 1 is provided with the first oil inlet way 8 with the P hydraulic fluid port intercommunication, with the draining way 9 of T hydraulic fluid port intercommunication.

The oil inlets of the first electric proportional valve 3, the second electric proportional valve 4 and the third electric proportional valve 5 are respectively connected with a first oil inlet path 8, the oil return ports are respectively connected with an oil drainage path 9, the output oil port and the F oil port of the first electric proportional valve 3 are connected for controlling the forward movement of the clutch, the output oil port and the R oil port of the third electric proportional valve 5 are connected for controlling the backward movement of the clutch, and the second electric proportional valve 4 and the PTO oil port are used for controlling the output torque of the engine.

An overflow valve 2 is installed in a valve block 1, an oil inlet of the overflow valve 2 is connected with a P oil port, an oil outlet of the overflow valve 2 is connected to a second oil inlet path 10, an oil return port of the overflow valve 2 is connected to an oil discharge path 9, a first hydraulic control reversing valve 6 and a second hydraulic control reversing valve 7 are installed in the valve block 1 respectively, oil inlets of the first hydraulic control reversing valve 6 and the second hydraulic control reversing valve 7 are connected to the second oil inlet path 10 respectively, and oil outlets of the first hydraulic control reversing valve 6 and the second hydraulic control reversing valve 7 are connected to a G oil port in parallel for controlling lubrication of a clutch. The control oil port of the first hydraulic control reversing valve 6 is connected to the output oil port of the first electric proportional valve 3, the control oil port of the second hydraulic control reversing valve is connected to the output oil port of the third electric proportional valve 5, the second oil inlet path 10 and the oil drainage path 9 are connected with the one-way valve 11, when the pressure of the second oil inlet path 10 reaches a certain value, the pressure is relieved to the oil drainage path 9 through the one-way valve 11, the second hydraulic control reversing valve 7 is conducted when the pressure of the control oil port is increased to a set value, and therefore the lubricating oil flows to the clutch.

The working principle is as follows: pressure oil enters from the port P, when the tractor needs to advance or retreat, the first electric proportional valve 3 or the third electric proportional valve 5 is controlled through a program, the pressure of the port F or the port R is controlled to be slowly increased, the clutch is slowly closed, meanwhile, the first hydraulic control reversing valve 6 or the second hydraulic control reversing valve 7 is reversed and conducted along with the pressure rising of the port F or the port R, low-pressure hydraulic oil enters the clutch for lubrication, and meanwhile, the tractor advances or retreats.

When the tractor needs to be stopped, the current of the first electric proportional valve 3 or the third electric proportional valve 5 is controlled through a program, the pressure of the oil port F or the oil port R is controlled to be slowly reduced, the clutch is slowly separated, meanwhile, along with the reduction of the pressure of the oil port F or the oil port R, the first hydraulic control reversing valve 6 or the second hydraulic control reversing valve 7 reverses and blocks, low-pressure hydraulic oil stops entering the clutch, and meanwhile, the tractor stops moving forwards or retreats.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a clutch proportional control and lubricated valves, includes valve block (1), be equipped with P hydraulic fluid port, T hydraulic fluid port, F hydraulic fluid port, R hydraulic fluid port, G hydraulic fluid port and PTO hydraulic fluid port on valve block (1), its characterized in that: a first electric proportional valve (3), a second electric proportional valve (4) and a third electric proportional valve (5) are respectively installed in the valve block (1), a first oil inlet path (8) communicated with a P oil port and an oil discharge path (9) communicated with a T oil port are arranged in the valve block (1), oil inlets of the first electric proportional valve (3), the second electric proportional valve (4) and the third electric proportional valve (5) are respectively connected with the first oil inlet path (8), oil return ports are respectively connected with the oil discharge path (9), an output oil port of the first electric proportional valve (3) is connected with an F oil port for controlling the forward movement of the clutch, and an output oil port of the third electric proportional valve (5) is connected with an R oil port for controlling the backward movement of the clutch;

install overflow valve (2) in valve block (1), the oil inlet and the P hydraulic fluid port of overflow valve (2) are connected, and the oil-out of overflow valve (2) connects to second oil feed way (10), and overflow valve (2) oil return opening connects to oil release way (9), install first hydraulic control switching-over valve (6), second hydraulic control switching-over valve (7) in valve block (1) respectively, the oil inlet of first hydraulic control switching-over valve (6), second hydraulic control switching-over valve (7) connects to second oil feed way (10) respectively and its oil-out is parallelly connected to the lubrication that the G hydraulic fluid port is used for controlling the clutch.

2. The proportioning control and lubrication valve set for a clutch as recited in claim 1, wherein: and the second electric proportional valve (4) and the PTO oil port are used for controlling the output torque of the engine.

3. The proportioning control and lubrication valve set for a clutch as recited in claim 1, wherein: and a control oil port of the first hydraulic control reversing valve (6) is connected to an output oil port of the first electric proportional valve (3), and a control oil port of the second hydraulic control reversing valve is connected to an output oil port of the third electric proportional valve (5).

4. The proportioning control and lubrication valve set for a clutch as recited in claim 1, wherein: the second oil inlet path (10) and the oil drainage path (9) are connected with a one-way valve (11), and oil in the second oil inlet path (10) can enter the oil drainage path (9) through the one-way valve (11).