KR20220023401A - Hydraulic Apparatus for Transmission of Agricultural Vehicle - Google Patents

Abstract

The present invention relates to a hydraulic device for a transmission of an agricultural vehicle, comprising: a hydraulic pump for supplying fluid to a transmission of an agricultural vehicle; a first operating line for connecting a first clutch and the hydraulic pump so that fluid to be used as working fluid can be supplied to the first clutch had by the transmission; a first lubricating line for connecting the first clutch and the hydraulic pump so that fluid to be used as lubricating fluid can be supplied to the first clutch; a first operating valve installed on the first operating line and selectively passing the fluid supplied from the hydraulic pump; a first lubricating valve installed on the first lubricating line and selectively passing the fluid supplied from the hydraulic pump; and a first lubricating control line having one side connected to the first operating line between the first operating valve and the first clutch and having the other side connected to the first lubricating valve. Therefore, provided is a hydraulic device for a transmission of an agricultural vehicle, wherein difficulty in controlling fluid supplied by a hydraulic pump can be solved.

Description

Hydraulic device for transmission of agricultural work vehicle {Hydraulic Apparatus for Transmission of Agricultural Vehicle}

The present invention relates to an agricultural work vehicle used for cultivating crops necessary for human life using land.

Agricultural work vehicles are used to grow crops necessary for human life using land. For example, a combine, a tractor, a rice transplanter, etc. correspond to agricultural work vehicles. The combine is to thresh crops such as rice, barley, wheat, and soybeans. A tractor uses traction to perform the work necessary to grow crops. The rice transplanter carries out the work of transplanting seedlings grown in a nail bed or a seedling box to a paddy field.

The agricultural work vehicle includes a transmission for adjusting torque, speed, etc. as needed in a work process, and a hydraulic device for supplying a fluid such as oil to the transmission. The fluid supplied by the hydraulic device is used for operation, lubrication, and the like in the transmission.

1 is a schematic block diagram of a hydraulic system for a transmission of an agricultural work vehicle according to the prior art.

Referring to FIG. 1 , a hydraulic device 10 for a transmission of an agricultural work vehicle according to the prior art includes a hydraulic pump 11 for supplying a fluid, a clutch 30 of a transmission 20 of an agricultural work vehicle, and the hydraulic pump. (11) an operation line 12 connected to each, an operation valve 13 installed in the operation line 12, a lubrication line 14 connected to each of the clutch 30 and the hydraulic pump 11, the lubrication line It includes a lubrication valve (15) installed in (14), and a control unit (16) for controlling the operation valve (13) and the lubrication valve (15).

When the fluid is not supplied to the clutch 30, the control unit 16 controls the operation valve 13 and the lubrication valve so that both the operation valve 13 and the lubrication valve 15 block the passage of the fluid. (15) is controlled. The fluid that has passed through the operation valve 13 is used as a working fluid for the operation of the clutch 30 . The fluid passing through the lubrication valve 15 is used as a lubricating fluid for lubrication of the clutch 30 .

When supplying fluid to the clutch 30, the control unit 16 controls both the operating valve 13 and the lubrication valve 15 to allow the fluid to pass through the operating valve 13 and the lubrication valve ( 15) is controlled.

As described above, in the hydraulic device 10 for a transmission of an agricultural work vehicle according to the prior art, the control unit 16 controls the operation valve 13 and the lubrication valve 15 depending on whether the fluid is supplied to the clutch 30 or not. ) must be controlled. Accordingly, the hydraulic device 10 for the transmission of the agricultural work vehicle according to the prior art has difficulty in controlling the fluid supplied by the hydraulic pump 11 to supply the working fluid and the lubricating fluid to the clutch 30 . there is a problem When the transmission 20 includes a plurality of clutches 30 , the number of objects to be controlled by the control unit 16 increases, and thus the above-described problem is further exacerbated.

The present invention has been devised to solve the above problems, and it is possible to solve the difficulty of controlling the fluid supplied by the hydraulic pump to supply the working fluid and the lubricating fluid to the clutch of the transmission of the agricultural work vehicle. To provide a hydraulic system for a transmission of an agricultural work vehicle.

In order to solve the above problems, the present invention may include the following configuration.

A hydraulic device for a transmission of an agricultural work vehicle according to the present invention includes: a hydraulic pump for supplying a fluid to the transmission of an agricultural work vehicle; a first operating line connecting the first clutch and the hydraulic pump so that a fluid to be used as a working fluid is supplied to the first clutch of the transmission; a first lubrication line connecting the first clutch and the hydraulic pump so that a fluid to be used as a lubricating fluid is supplied to the first clutch; a first operating valve installed in the first operating line and selectively passing the fluid supplied from the hydraulic pump; a first lubrication valve installed in the first lubrication line and selectively passing the fluid supplied from the hydraulic pump; and a first lubrication control line having one side connected to the first operating line between the first operating valve and the first clutch and the other side connected to the first lubrication valve. A portion of the fluid supplied to the first clutch through the first operation valve may be supplied to the first lubrication control line. The first lubrication valve may selectively pass the fluid flowing along the first lubrication line according to the hydraulic pressure of the fluid flowing along the first lubrication control line.

According to the present invention, the following effects can be achieved.

The present invention is implemented so that the fluid for lubrication can be supplied to the clutch only by controlling the operation valve without separate control of the lubrication valve. Accordingly, the present invention can improve the easiness of the operation of controlling the fluid supplied by the hydraulic pump to supply the lubricating fluid to the clutch.

The present invention is implemented so that when a fluid for operation is supplied to the clutch, the fluid for lubrication is supplied to the clutch. Accordingly, according to the present invention, it is possible to reduce the occurrence of drag, wear or damage caused by insufficient fluid for lubrication in the clutch. Accordingly, the present invention can contribute not only to improving the performance of the clutch, but also to extending the service life of the clutch.

1 is a schematic block diagram of a hydraulic system for a transmission of an agricultural work vehicle according to the prior art;
2 and 3 are schematic block diagrams of a hydraulic system for a transmission of an agricultural work vehicle according to the present invention;
Figure 4 is a schematic block diagram showing an embodiment in which the hydraulic device for the transmission of the agricultural work vehicle according to the present invention is applied to the forward and backward clutches;
5 is a schematic block diagram showing an example of a dual-clutch transmission to which a hydraulic system for a transmission of an agricultural work vehicle according to the present invention can be applied;
6 and 7 are schematic block diagrams showing an embodiment in which a hydraulic device for a transmission of an agricultural work vehicle according to the present invention is applied to a dual clutch transmission.

Hereinafter, an embodiment of a hydraulic system for a transmission of an agricultural work vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2 , the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention is provided in the agricultural work vehicle such as a tractor, a combine, and a rice transplanter. The agricultural work vehicle includes a transmission 100 for shifting the drive transmitted from an engine (Engine, not shown). The hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention is responsible for a control function for controlling a clutch of the transmission 100 using a fluid and a lubrication function for lubricating the clutch using a fluid do. The fluid may be oil. The clutch selectively outputs a drive using friction between disks.

The hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention can implement a control function for the clutch by supplying a fluid to the clutch so that the disks are in contact with each other or the disks are spaced apart from each other. When the disks are in contact with each other, the clutch can output drive. When the disks are spaced apart from each other, the clutch may not output drive. The hydraulic system 1 for a transmission of an agricultural work vehicle according to the present invention supplies a fluid to the clutch to lubricate the disks, thereby implementing a lubrication function for the clutch.

To this end, the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention may include a hydraulic pump 2 , a first operation valve 3 , and a first lubrication valve 4 .

Referring to FIG. 2 , the hydraulic pump 2 supplies fluid. The hydraulic pump 2 may be connected to each of the first operation valve 3 and the first lubrication valve 4 . When the fluid supplied by the hydraulic pump 2 is supplied to the first clutch 110 of the transmission 100 through the first operation valve 3 , the fluid controls the first clutch 110 . It can be used as a working fluid. When the fluid supplied by the hydraulic pump 2 is supplied to the first clutch 110 through the first lubrication valve 4 , the fluid may be used as a lubricating fluid for lubricating the first clutch 110 . . The hydraulic pump 2 may be connected to the first operation valve 3 through a first pump supply line 21 .

The hydraulic pump 2 may be connected to the first lubrication valve 4 through the first pump supply line 21 and the second pump supply line 22 . The second pump supply line 22 may be connected to the first pump supply line 21 , and may be connected to the hydraulic pump 2 through the first pump supply line 22 . The first pump supply line 21 and the second pump supply line 22 may be implemented in a tube structure such as a hose and a pipe, respectively. Each of the first pump supply line 21 and the second pump supply line 22 may be implemented as a passage structure in which a groove, a hole, etc. are processed inside a structure (not shown). The first pump supply line 21 and the second pump supply line 22 may be implemented in a form in which the tube structure and the passage structure are combined, respectively. That is, the first pump supply line 21 and the second pump supply line 22 may be implemented in the form of the tube structure, the passage structure, or a combination of the tube structure and the passage structure, respectively. In the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention, the configuration corresponding to a line providing a passage through which a fluid can flow is a combination of the tube structure, the passage structure, or the tube structure and the passage structure. It can be implemented in the form

Referring to FIG. 2 , the first operating valve 3 selectively passes the fluid supplied from the hydraulic pump 2 . The first operation valve 3 may be installed in the first operation line 31 . The first operation line 31 connects the hydraulic pump 2 and the first clutch 110 . The first operating line 31 may be implemented as a passage through which a fluid to be used as the working fluid in the first clutch 110 flows. One side of the first operation line 31 may be connected to the first pump supply line 21 , and may be connected to the hydraulic pump 2 through the first pump supply line 21 . The other side of the first operation line 31 may be connected to the first clutch 110 . A fluid may be supplied to a first hydraulic chamber (not shown) of the first clutch 110 through the first operation line 31 . The fluid may be discharged from the first hydraulic chamber through the first operation line 31 .

The first operation valve 3 may be installed between one side of the first operation line 31 and the other side of the first operation line 31 . The first operation valve 3 may selectively pass the fluid supplied from the hydraulic pump 2 under the control of the controller 1a. When the first clutch 110 is operated, the first operation valve 3 may allow the fluid supplied from the hydraulic pump 2 to pass through under the control of the controller 1a. When the first clutch 110 is not operated, the first operating valve 3 may block the passage of the fluid supplied from the hydraulic pump 2 under the control of the controller 1a. The first operating valve 3 may be implemented in various ways, such as an on-off valve, a proportional control valve, and the like.

Referring to FIG. 2 , the first lubrication valve 4 selectively passes the fluid supplied from the hydraulic pump 2 . The first lubrication valve 4 may be installed in the first lubrication line 41 . The first lubrication line 41 connects the hydraulic pump 2 and the first clutch 110 . The first lubrication line 41 may be implemented as a passage through which a fluid to be used as a lubricating fluid in the first clutch 110 flows. The first lubrication line 41 has one side connected to the second pump supply line 22 , and the hydraulic pump 2 through the second pump supply line 22 and the first pump supply line 21 . ) can be connected to The other side of the first lubrication line 41 may be connected to the first clutch 110 . A fluid may be supplied to lubricating parts requiring lubrication in the first clutch 110 through the first lubrication line 41 .

The first lubrication valve 4 may be installed between one side of the first lubrication line 41 and the other side of the first lubrication line 41 . The first lubrication valve 4 operates by using a portion of the fluid supplied to the first clutch 110 through the first operation valve 3 to remove the fluid supplied from the hydraulic pump 2 . can pass

To this end, a first lubrication control line 42 may be connected to the first lubrication valve 4 . One side of the first lubrication control line 42 may be connected to the first operation line 31 between the first operation valve 3 and the first clutch 110 . The other side of the first lubrication control line 42 may be connected to the first lubrication valve 4 . Accordingly, when the first actuating valve 3 passes the fluid supplied from the hydraulic pump 2 to operate the first clutch 110, it flows along the first actuating line 31 A portion of the fluid may be branched and supplied to the first lubrication control line 42 . The fluid supplied to the first lubrication control line 42 may be supplied to the first lubrication valve 4 , thereby generating hydraulic pressure for operating the first lubrication valve 4 . Accordingly, as the first lubrication valve 4 operates to pass the fluid supplied from the hydraulic pump 2 , the fluid for lubrication may be supplied to the first clutch 110 .

As described above, the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention uses a portion of the fluid that has passed through the first operation valve 3 to operate the first clutch 110 to operate the first It is implemented to operate the lubrication valve (4). Therefore, in the hydraulic system 1 for a transmission of an agricultural work vehicle according to the present invention, the first clutch ( 110) is implemented so that a fluid for lubrication can be supplied. Accordingly, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention improves the easiness of the operation of controlling the fluid supplied by the hydraulic pump 2 to supply the lubricating fluid to the first clutch 110 . can be improved In addition, the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention is implemented such that, when a fluid for operation is supplied to the first clutch 110 , a fluid for lubrication is supplied to the first clutch 110 . do. Therefore, the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention can reduce the drag phenomenon, wear or damage caused by insufficient fluid for lubrication in the first clutch 110 . . Accordingly, the hydraulic system 1 for the transmission of the agricultural work vehicle according to the present invention can contribute to improving the performance of the first clutch 110 as well as to increase the service life of the first clutch 110. can

The first lubrication valve 4 is implemented to selectively pass the fluid flowing along the first lubrication line 41 according to the hydraulic pressure of the fluid flowing along the first lubrication control line 42 . As described above, when the first operating valve 3 passes the fluid supplied from the hydraulic pump 2 to operate the first clutch 110, the first operating line 31 After being supplied to the first lubrication control line (42), as the hydraulic pressure of the fluid flowing along the first lubrication control line (42) rises, the first lubrication valve (4) moves along the first lubrication line (41). operable to pass a flowing fluid. When the first operation valve 3 blocks the passage of the fluid supplied from the hydraulic pump 2 , the fluid is not supplied to the first lubrication control line 42 from the first operation line 31 . can Even when the fluid is supplied from the operation line 31 to the first lubrication control line 42 , the hydraulic pressure of the fluid flowing along the first lubrication control line 42 is reduced. Accordingly, the first lubrication valve 4 may operate to block the passage of the fluid flowing along the first lubrication line 41 .

As such, when the first operating valve 3 permits the passage of the fluid supplied from the hydraulic pump 2 to operate the first clutch 110 , the first lubrication valve 4 operates the The first clutch 110 may be lubricated by allowing the fluid supplied from the hydraulic pump 2 to pass therethrough. In this case, the first lubrication valve 4 allows the fluid supplied from the hydraulic pump 2 to pass by the hydraulic pressure of the fluid supplied from the first operation line 31 to the first lubrication control line 42 . can operate to allow On the other hand, when the first operation valve 3 blocks the passage of the fluid supplied from the hydraulic pump 2 , the first lubrication valve 4 prevents the passage of the fluid supplied from the hydraulic pump 2 . It can act to block.

Therefore, in the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention, a fluid for lubrication is supplied to the first clutch 110 only when lubrication is required for the first clutch 110, When lubrication is not required for the first clutch 110 , a fluid for lubrication may not be supplied to the first clutch 110 . Accordingly, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention can reduce the amount of wasted fluid for lubrication.

The first lubrication valve 4 may include a first lubrication passage mechanism 43 , a first lubrication cutoff mechanism 44 , a first lubrication body 45 , and a first elastic member 46 .

The first lubrication passage mechanism 43 allows the fluid supplied from the hydraulic pump 2 to pass through. The first lubrication passing mechanism 43 may be coupled to the first lubrication body 45 .

The first lubrication shutoff mechanism 44 blocks the passage of the fluid supplied from the hydraulic pump 2 . The first lubrication blocking mechanism 44 may be coupled to the first lubrication body 45 .

The first lubrication body 45 moves between the first lubrication position and the first unit value. When the first lubrication body 45 is positioned at the first lubrication position, the first lubrication passage mechanism 43 may be connected to the first lubrication line 41 . Accordingly, the fluid supplied from the hydraulic pump 2 may be supplied to the first clutch 110 through the first lubrication passage mechanism 43 . When the first lubrication body 45 is positioned at the first primary unit value, the first lubrication blocking mechanism 44 may be connected to the first lubrication line 41 . Accordingly, since the fluid supplied from the hydraulic pump 2 does not pass through the first lubrication shutoff mechanism 44 , it cannot be supplied to the first clutch 110 .

The first elastic member 46 elastically presses the first lubricating body 45 so that the first lubricating body 45 is positioned at the first primary unit value. The first elastic member 46 may be implemented as a spring having a predetermined elastic force. The first elastic member 46 may press one side of the first lubrication body 45 . The first lubrication control line 42 may be connected to the other side of the first lubrication body 45 . Accordingly, the other side of the first lubrication body 45 may be pressurized by the hydraulic pressure of the fluid flowing along the first lubrication control line 42 .

The first lubrication valve 4 may selectively pass the fluid supplied from the hydraulic pump 2 while operating as follows.

First, when the first actuating valve 3 permits the passage of the fluid supplied from the hydraulic pump 2 to operate the first clutch 110, the first lubrication body 45 may It may be moved to the first lubrication position by the hydraulic pressure of the fluid supplied from the first operation line 31 to the first lubrication control line 42 . In this case, the hydraulic pressure of the fluid flowing along the first lubrication control line 42 may increase to be larger than the elastic force of the first elastic member 46 . Accordingly, since the first lubrication passage mechanism 43 is connected to the first lubrication line 41 , the first lubrication valve 4 can pass the fluid supplied from the hydraulic pump 2 . Accordingly, a fluid for lubrication is supplied to the first clutch 110 .

Next, when the first operating valve 3 blocks the passage of the fluid supplied from the hydraulic pump 2 , the first lubricating body 45 is activated by the elastic force of the first elastic member 46 . It can be moved to the first order value. In this case, the hydraulic pressure of the fluid flowing along the first lubrication control line 42 may be reduced to be smaller than the elastic force of the first elastic member 46 . Accordingly, since the first lubrication shutoff mechanism 44 is connected to the first lubrication line 41 , the first lubrication valve 4 can block the passage of the fluid supplied from the hydraulic pump 2 . . Accordingly, a fluid for lubrication is not supplied to the first clutch 110 .

Referring to FIG. 3 , the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention may include a second operating valve 5 and a second lubrication valve 6 .

The second operation valve 5 selectively passes the fluid supplied from the hydraulic pump 2 . The second operation valve 5 may be installed in the second operation line 51 . The second operation line 51 connects the hydraulic pump 2 and the second clutch 120 of the transmission 100 . The second operating line 51 may be implemented as a passage through which a fluid to be used as the working fluid in the second clutch 120 flows. One side of the second operation line 51 may be connected to the first pump supply line 21 , and may be connected to the hydraulic pump 2 through the first pump supply line 21 . In this case, one side of the first pump supply line 21 may be connected to the hydraulic pump 2 , and the other end may be connected to each of the first operation line 31 and the second operation line 51 . The other side of the second operation line 51 may be connected to the second clutch 120 . A fluid may be supplied to a second hydraulic chamber (not shown) of the second clutch 120 through the second operation line 51 . The fluid may be discharged from the second hydraulic chamber through the second operation line 51 .

The second operation valve 5 may be installed between one side of the second operation line 51 and the other side of the second operation line 51 . The second operation valve 5 may selectively pass the fluid supplied from the hydraulic pump 2 under the control of the controller 1a (shown in FIG. 2 ). When the second clutch 120 is actuated, the second actuating valve 5 allows the fluid supplied from the hydraulic pump 2 to pass through under the control of the controller 1a (shown in FIG. 2 ). can do. When the second clutch 120 is not operated, the second operation valve 5 controls the passage of the fluid supplied from the hydraulic pump 2 under the control of the controller 1a (shown in FIG. 2 ). can be blocked The second operating valve 5 may be implemented in various ways, such as an on-off valve, a proportional control valve, and the like.

The second lubrication valve (6) selectively passes the fluid supplied from the hydraulic pump (2). The second lubrication valve 6 may be installed in the second lubrication line 61 . The second lubrication line 61 connects the hydraulic pump 2 and the second clutch 120 . The second lubrication line 61 may be implemented as a passage through which a fluid to be used as a lubricating fluid in the second clutch 120 flows. The second lubrication line 61 has one side connected to the second pump supply line 22 , and the hydraulic pump 2 through the second pump supply line 22 and the first pump supply line 21 . ) can be connected to In this case, the second pump supply line 22 has one end connected to the first pump supply line 21 and the other end connected to the first lubrication line 41 and the second lubrication line 61, respectively. can The second lubrication line 61 may have the other end connected to the second clutch 120 . A fluid may be supplied to lubricating parts requiring lubrication in the second clutch 120 through the second lubrication line 61 .

The second lubrication valve 6 may be installed between one side of the second lubrication line 61 and the other side of the second lubrication line 61 . The second lubrication valve 6 operates by using a part of the fluid supplied to the second clutch 120 through the second operation valve 5 to remove the fluid supplied from the hydraulic pump 2 . can pass

To this end, a second lubrication control line 62 may be connected to the second lubrication valve 6 . One side of the second lubrication control line 62 may be connected to the second operation line 51 between the second operation valve 5 and the second clutch 120 . The second lubrication control line 62 may have the other end connected to the second lubrication valve 6 .

When the second actuating valve 5 permits the passage of the fluid supplied from the hydraulic pump 2 to operate the second clutch 120, the second lubrication valve 6 operates the hydraulic pump ( By allowing the fluid supplied from 2) to pass through, the second clutch 120 may be lubricated. In this case, a portion of the fluid supplied to the second clutch 120 through the second operation valve 5 may be supplied to the second lubrication control line 62 . Accordingly, the second lubrication valve 6 allows the fluid supplied from the hydraulic pump 2 to pass by the hydraulic pressure of the fluid supplied from the second operation line 51 to the second lubrication control line 62 . can operate to allow On the other hand, when the second operation valve 5 blocks the passage of the fluid supplied from the hydraulic pump 2 , the second lubrication valve 6 prevents the passage of the fluid supplied from the hydraulic pump 2 . It can act to block. In this way, the second lubrication valve 6 can selectively pass the fluid flowing along the second lubrication line 61 according to the hydraulic pressure of the fluid flowing along the second lubrication control line 62 . . Therefore, the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention can achieve the following effects.

First, although the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention is implemented to supply fluid for control and lubrication to the plurality of clutches 110 and 120, the lubrication valves 4 and 6 It is implemented so that the fluid for lubrication can be supplied to the clutches 110 and 120 only by controlling the actuating valves 3 and 5 without separate control for the . Accordingly, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention facilitates the operation of controlling the fluid supplied by the hydraulic pump 2 to supply the lubricating fluid to the clutches 110 and 120 . can improve

Second, in the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention, when a fluid for operation is supplied to the clutches 110 and 120 , the fluid for lubrication is automatically supplied to the clutches 110 and 120 . It is implemented to be supplied as Therefore, the hydraulic system 1 for a transmission of an agricultural work vehicle according to the present invention can not only contribute to improving the performance of the clutches 110 and 120, but also increase the service life of the clutches 110 and 120. can contribute

Third, the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention provides a fluid for lubrication to the clutches 110 and 120 only when lubrication is required for the clutches 110 and 120, , when lubrication is not required for the clutches 110 and 120 , it may be implemented so that a fluid for lubrication is not supplied to the clutches 110 and 120 . Accordingly, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention can reduce the amount of wasted fluid for lubrication.

The second lubrication valve 6 may include a second lubrication passage mechanism 63 , a second lubrication cutoff mechanism 64 , a second lubrication body 65 , and a second elastic member 66 .

The second lubrication passage mechanism 63 allows the fluid supplied from the hydraulic pump 2 to pass through. The second lubrication passing mechanism 63 may be coupled to the second lubrication body 65 .

The second lubrication shutoff mechanism (64) blocks the passage of the fluid supplied from the hydraulic pump (2). The second lubrication blocking mechanism 64 may be coupled to the second lubrication body 65 .

The second lubrication body 65 moves between the second lubrication position and the second unit value. When the second lubrication body 65 is positioned at the second lubrication position, the second lubrication passage mechanism 63 may be connected to the second lubrication line 61 . Accordingly, the fluid supplied from the hydraulic pump 2 may be supplied to the second clutch 120 through the second lubrication passage mechanism 63 . When the second lubrication body 65 is positioned at the second unit value, the second lubrication blocking mechanism 64 may be connected to the second lubrication line 61 . Accordingly, since the fluid supplied from the hydraulic pump 2 does not pass through the second lubrication shutoff mechanism 64 , it cannot be supplied to the second clutch 120 .

The second elastic member 66 elastically presses the second lubricating body 65 so that the second lubricating body 65 is positioned at the second order value. The second elastic member 66 may be implemented as a spring having a predetermined elastic force. The second elastic member 66 may press one side of the second lubrication body 65 . The second lubrication control line 62 may be connected to the other side of the second lubrication body 65 . Accordingly, the other side of the second lubrication body 65 may be pressurized by the hydraulic pressure of the fluid flowing along the second lubrication control line 62 .

The second lubrication valve 6 may selectively pass the fluid supplied from the hydraulic pump 2 while operating as follows.

First, when the second actuating valve 5 permits the passage of the fluid supplied from the hydraulic pump 2 to operate the second clutch 120, the second lubrication body 65 may It can be moved to the second lubrication position by the hydraulic pressure of the fluid supplied from the second operation line 51 to the second lubrication control line 62 . In this case, the hydraulic pressure of the fluid flowing along the second lubrication control line 62 may increase to be larger than the elastic force of the second elastic member 66 . Accordingly, since the second lubrication passage mechanism 63 is connected to the second lubrication line 61 , the second lubrication valve 6 can pass the fluid supplied from the hydraulic pump 2 . Accordingly, a fluid for lubrication is supplied to the second clutch 120 .

Next, when the second actuating valve 5 blocks the passage of the fluid supplied from the hydraulic pump 2 , the second lubrication body 65 is activated by the elastic force of the second elastic member 66 . It can be moved to a second-order unit value. In this case, the hydraulic pressure of the fluid flowing along the second lubrication control line 62 may be reduced to be smaller than the elastic force of the second elastic member 66 . Accordingly, since the second lubrication shutoff mechanism 64 is connected to the second lubrication line 61 , the second lubrication valve 6 can block the passage of the fluid supplied from the hydraulic pump 2 . . Accordingly, the fluid for lubrication is not supplied to the second clutch 120 .

2 and 3 , the hydraulic system 1 for a transmission of an agricultural work vehicle according to the present invention may include a pressure control valve 7 .

The pressure control valve 7 may be installed in the second pump supply line 22 . In this case, the second pump supply line 22 may have one end connected to the first pump supply line 21 and the other end connected to the first lubrication line 41 . The first pump supply line 21 may have one end connected to the hydraulic pump 2 and the other end connected to the first operation line 31 . The pressure control valve 7 may be disposed between one side of the second pump supply line 22 and the other side of the second pump supply line 22 .

The pressure control valve 7 may selectively pass the fluid flowing along the second pump supply line 22 according to the hydraulic pressure of the fluid flowing along the first operation line 31 . When the hydraulic pressure of the fluid flowing along the first operation line 31 is less than or equal to a preset reference hydraulic pressure, the pressure control valve 7 may block the passage of the fluid flowing along the second pump supply line 22 . there is. The reference hydraulic pressure is a hydraulic pressure sufficient to operate the first clutch 110 , and may be preset by an operator. When the hydraulic pressure of the fluid flowing along the first operation line 31 exceeds the reference hydraulic pressure, the pressure control valve 7 allows the fluid flowing along the second pump supply line 22 to pass through. can do.

As such, the pressure control valve 7 operates the first lubrication valve 4 only when the hydraulic pressure of the fluid flowing along the first operation line 31 is sufficient to operate the first clutch 110 . ) can be supplied with the fluid. The fluid supplied to the first lubrication valve 4 may be used for lubrication by being supplied to the first clutch 110 depending on whether the first clutch 110 is operated. Accordingly, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention is implemented such that the fluid supplied from the hydraulic pump 2 is preferentially used to operate the first clutch 110 . Accordingly, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention may be implemented so that the transmission 100 may stably change the speed by controlling the first clutch 110 .

As shown in FIG. 3 , when the first clutch 110 and the second clutch 120 are provided, the pressure control valve 7 is connected to the first operating line 31 and the second operating line ( 51), the fluid flowing along the second pump supply line 22 may be selectively passed according to the hydraulic pressure of the fluid flowing along it. In this case, one side of the first pump supply line 21 may be connected to the hydraulic pump 2 , and the other end may be connected to each of the first operation line 31 and the second operation line 51 . One side of the second pump supply line 22 may be connected to the first pump supply line 21 , and the other side may be connected to each of the first lubrication line 41 and the second lubrication line 61 . When the hydraulic pressure of the fluid flowing along the first operation line 31 and the second operation line 51 is equal to or less than the reference oil pressure, the pressure control valve 7 moves along the second pump supply line 22 . It can block the passage of the flowing fluid. In this case, the reference hydraulic pressure may be preset by an operator to a hydraulic pressure sufficient to operate at least one of the first clutch 110 and the second clutch 120 . When the hydraulic pressure of the fluid flowing along the first operation line 31 and the second operation line 51 exceeds the reference oil pressure, the pressure control valve 7 is connected to the second pump supply line 22 . may allow the passage of fluid flowing along it.

As such, the pressure control valve 7 controls the hydraulic pressure of the fluid flowing along the first operation line 31 and the second operation line 51 to the first clutch 110 and the second clutch 120 . Only when the hydraulic pressure is sufficient to operate at least one of them, the fluid may be supplied to the first lubrication valve 4 and the second lubrication valve 6 . The fluid supplied to the first lubrication valve 4 and the second lubrication valve 6 is supplied to the first clutch 110 depending on whether the first clutch 110 and the second clutch 120 are operated. and at least one of the second clutch 120 may be supplied to be used for lubrication. Accordingly, in the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention, the fluid supplied from the hydraulic pump 2 operates at least one of the first clutch 110 and the second clutch 120. It is implemented to be used preferentially. Accordingly, in the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention, the transmission 100 stably shifts through the control of the first clutch 110 and the second clutch 120 . can be implemented to

2 and 4, when the first clutch 110 is the forward and backward clutch 111, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention may be implemented as follows.

Prior to explaining the hydraulic device 1 for a transmission of an agricultural work vehicle according to the present invention, the forward/reverse clutch 111 will be described as follows.

The forward and backward clutch 111 is selectively connected to any one of the forward gear 112 and the reverse gear 113 . The forward/backward clutch 111 may be selectively connected to any one of the forward gear 112 and the reverse gear 113 using friction. The forward and backward clutch 111 may be coupled to the forward and backward shaft 114 . The forward gear 112 and the reverse gear 113 may be coupled to the forward/reverse shaft 114 to be idling, respectively. The forward/reverse clutch 111 , the forward gear 112 , and the reverse gear 113 may belong to a forward/backward transmission unit of the transmission 110 . The forward gear 112 and the reverse gear 113 may be meshed with gears of a subsequent transmission unit (not shown) of the transmission 100 , respectively. When the forward/reverse clutch 111 is connected to the forward gear 112, the drive transmitted through the forward/reverse shaft 114 is transferred to the subsequent shift unit via the forward/backward clutch 111 and the forward gear 112. It can be shifted forward while being transmitted. When the forward/reverse clutch 111 is connected to the reverse gear 113, the drive transmitted through the forward/reverse shaft 114 goes through the forward/reverse clutch 111 and the reverse gear 113 to the subsequent shift unit. It can be shifted backwards while being transmitted.

In order to control and lubricate the forward/backward clutch 111 , the first operating valve 3 may include a forward fastening valve 3a and a reverse fastening valve 3b.

The forward fastening valve 3a supplies fluid so that the forward/reverse clutch 111 performs forward shifting. The forward fastening valve (3a) may be installed in the forward operation line (31a). The forward operation line 31a may have one side connected to the pump supply line 21 and the other side connected to the forward/backward clutch 111 . The other side of the forward operation line 31a may be connected to an oil pressure chamber (not shown) for forward transmission of the forward and backward clutch 111 . When the forward fastening valve 3a operates to allow the fluid supplied from the hydraulic pump 2 to pass through, the fluid supplied from the hydraulic pump 2 flows along the forward operation line 31a while moving forward. It may be supplied to the forward/backward clutch 111 through the fastening valve 3a.

The reverse fastening valve 3b supplies a fluid so that the forward/reverse clutch 111 performs reverse shift. The reverse fastening valve 3b may be installed in the reverse operation line 31b. The reverse operation line 31b may have one side connected to the pump supply line 21 and the other side connected to the forward/backward clutch 111 . The other side of the reverse operation line 31b may be connected to a hydraulic chamber (not shown) for reverse transmission of the forward and backward clutch 111 . When the reverse fastening valve 3b operates to allow the fluid supplied from the hydraulic pump 2 to pass through, the fluid supplied from the hydraulic pump 2 flows along the reverse operation line 31b while moving backward. It may be supplied to the forward/backward clutch 111 through the fastening valve 3b.

The first lubrication control line 42 is connected to the forward operation line 31a between the forward fastening valve 3a and the forward and backward clutch 111, and the reverse fastening valve 3b and the forward and backward movement. It may be connected to the reverse operation line 31b between the clutches 111 . Also, the first lubrication control line 42 may be connected to the first lubrication valve 4 . Accordingly, in both the case where the forward fastening valve 3a allows the passage of fluid for the forward shift and the case where the reverse fastening valve 3b allows the passage of the fluid for the reverse shift, the first The first lubrication valve 4 may operate to allow passage of the fluid supplied from the hydraulic pump 2 by the hydraulic pressure of the fluid flowing along the first lubrication control line 42 .

5 and 6, when the transmission 100 is a dual clutch transmission (DCT), the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention can be implemented as follows. there is.

Prior to explaining the hydraulic system 1 for a transmission of an agricultural work vehicle according to the present invention, the dual clutch transmission 100 will be described as follows.

The transmission 200 may be implemented as a dual clutch transmission (DCT). The transmission 200 may include a leading transmission unit 130 , a trailing transmission unit 140 , and the second clutch 120 .

The preceding transmission unit 130 is connected to the engine. The preceding transmission unit 130 may be directly connected to the engine, or may be connected to the engine through another transmission unit such as a forward/reverse transmission unit (not shown). The preceding transmission unit 130 may include a first leading transmission mechanism 131 and a second leading transmission mechanism 132 . The first preceding transmission mechanism 131 performs a first preceding shift with respect to the drive transmitted from the engine. The first leading transmission mechanism 131 may perform the first preceding shift using a plurality of first leading transmission gears (not shown) and at least one first leading sleeve 131a. The second preceding transmission mechanism 132 performs a second preceding transmission with respect to the drive transmitted from the engine. The second leading transmission mechanism 132 may perform the second leading shift using a plurality of second leading transmission gears (not shown) and at least one second leading sleeve 132a.

The preceding transmission unit 130 may include a preceding input mechanism 133 connected to each of the first leading transmission mechanism 131 and the second leading transmission mechanism 132 . The preceding input device 133 may be connected to the engine. The preceding input mechanism 133 may transmit the drive transmitted from the engine to each of the first leading transmission mechanism 131 and the second leading transmission mechanism 132 .

The trailing transmission unit 140 is connected to the preceding transmission unit 130 . The rear shifting unit 140 may perform the following shifting with respect to the driving transmitted from the preceding shifting unit 130 . The rear shifting unit 140 may perform the rear shifting using a plurality of rear gears and at least one trailing sleeve. The trailing shifting unit 140 may transmit the driving in which the trailing shifting is made to the axle. The trailing transmission unit 140 may be implemented as an auxiliary transmission unit. In this case, the preceding transmission unit 130 may be implemented as a peripheral transmission unit. When the trailing transmission unit 140 is implemented as a main transmission unit, the preceding transmission unit 130 may be implemented as an auxiliary transmission unit.

The second clutch 120 may be connected to each of the preceding transmission unit 130 and the trailing transmission unit 140 . The second clutch 120 may include an ODD clutch 121 and an EVEN clutch 122 .

The odd clutch 121 is connected to each of the first leading transmission mechanism 131 and the trailing transmission unit 140 . In this case, the first preceding transmission mechanism 131 may transmit the drive to the odd clutch 121 . The trailing transmission unit 140 may receive driving from the odd clutch 121 . The odd clutch 121 may selectively transmit the drive transmitted from the first leading transmission mechanism 131 to the trailing transmission unit 140 . When the odd clutch 121 is in the engaged state, the odd clutch 121 may transmit the drive transmitted from the first leading transmission mechanism 131 to the trailing transmission unit 140 . When the odd clutch 121 is in the released state, the odd clutch 121 does not transmit the drive to the trailing transmission unit 140 even if the drive is transmitted from the first leading transmission mechanism 131 . The odd clutch 121 may be implemented as a multiple disk clutch that selectively outputs a drive using friction.

The even clutch 122 is connected to each of the second leading transmission mechanism 132 and the trailing transmission unit 140 . In this case, the second preceding transmission mechanism 132 may transmit the drive to the even clutch 122 . The trailing transmission unit 140 may receive driving from the even clutch 122 . The even clutch 122 may selectively transmit the drive transmitted from the second leading transmission mechanism 132 to the trailing transmission unit 140 . When the even clutch 122 is in a fastened state, the even clutch 122 may transmit the drive transmitted from the second leading transmission mechanism 132 to the trailing transmission unit 140 . When the even clutch 122 is in the released state, the even clutch 122 does not transmit the drive to the trailing transmission unit 140 even if the drive is transmitted from the second leading transmission mechanism 132 . The even clutch 122 may be implemented as a multi-plate clutch that selectively outputs a drive using friction.

Although not shown, the rear transmission unit 140 may be implemented to include a plurality of rear transmission mechanisms. Each of the rear transmission mechanisms may perform rear shifting using a plurality of rear transmission gears and at least one trailing sleeve. A first rear transmission mechanism among the rear transmission mechanisms may be connected to the odd clutch 121 . Among the rear transmission mechanisms, a second rear transmission mechanism may be connected to the even clutch 122 . The rear transmission unit 140 may be implemented to include one rear transmission mechanism. In this case, the rear transmission mechanism may be connected to each of the odd clutch 121 and the even clutch 122 .

In order to control and lubricate the odd clutch 121 and the even clutch 122 of the dual clutch transmission 100, the hydraulic system 1 for the transmission of the agricultural work vehicle according to the present invention operates in an odd operation. It may include a valve (5a), an even operation valve (5b), and a dual lubrication valve (6a).

The odd operation valve 5a supplies a fluid to the odd clutch 121 . The odd operation valve 5a may supply a fluid so that the odd clutch 121 is fastened. The odd operation valve (5a) may be installed in the odd operation line (51a). The odd operation line 51a may connect the odd operation valve 5a and the odd clutch 121 . In this case, the odd operation line 51a may be implemented to connect the odd clutch 121 and the hydraulic pump 2 . The odd operation line 51a may have one end connected to the first pump supply line 21 and the other end connected to the odd clutch 121 . The other side of the odd operation line 51a may be connected to an odd hydraulic chamber (not shown) of the odd clutch 121 . The odd operation valve 5a may be disposed between one side and the other side of the odd operation line 51a.

When the OD operation valve 5a operates to allow the fluid supplied from the hydraulic pump 2 to pass through, the fluid supplied from the hydraulic pump 2 flows along the OD operation line 51a. It may be supplied to the odd clutch 121 through the operation valve 5a. The odd clutch 121 is fastened using the fluid supplied through the odd operation line 51a as a working fluid, so that the drive transmitted from the first leading transmission mechanism 121 is transferred to the trailing transmission unit 140 . can transmit

The even operation valve 5b supplies a fluid to the even clutch 122 . The even operation valve 5b may supply a fluid so that the even clutch 122 is fastened. The even operation valve (5b) may be installed in the even operation line (51b). The even operation line 51b may connect the even operation valve 5b and the even clutch 122 . In this case, the even operation line 51b may be implemented to connect the even clutch 122 and the hydraulic pump 2 . The even operation line 51b may have one end connected to the first pump supply line 21 and the other end connected to the even clutch 122 . The other side of the even operation line 51b may be connected to an even hydraulic chamber (not shown) of the even clutch 122 . The even operation valve (5b) may be disposed between one side and the other side of the even operation line (51b).

When the even operation valve 5b operates to allow the fluid supplied from the hydraulic pump 2 to pass through, the fluid supplied from the hydraulic pump 2 flows along the even operation line 51b It may be supplied to the even clutch 122 through the operation valve 5b. The even clutch 122 is fastened using the fluid supplied through the even operation line 51b as a working fluid, thereby transferring the drive transmitted from the second leading transmission mechanism 122 to the trailing transmission unit 140 . can transmit

The dual lubrication valve (6a) selectively passes the fluid supplied from the hydraulic pump (2). The dual lubrication valve 6a may be installed in the dual lubrication line 61a. The dual lubrication line 61a may connect each of the odd clutch 121 and the even clutch 122 to the hydraulic pump 2 . The dual lubrication line 61a may have one end connected to the second pump supply line 22 and the other end connected to the odd clutch 121 and the even clutch 122, respectively. A fluid may be supplied to each of the lubricating parts requiring lubrication in the odd clutch 121 and the lubricating parts requiring lubrication in the even clutch 122 through the dual lubrication line 61a.

The dual lubrication valve 6a may be installed between one side of the dual lubrication line 61a and the other side of the dual lubrication line 61a. The dual lubrication valve 6a is operated using a part of the fluid supplied to the odd clutch 121 or the even clutch 122 through the odd operation valve 5a or the even operation valve 5b. , it is possible to pass the fluid supplied from the hydraulic pump (2).

To this end, a dual lubrication control line 62a may be connected to the dual lubrication valve 6a. The dual lubrication control line 62a has one side connected to the odd operation line 51a between the odd operation valve 5a and the odd clutch 121, and the even operation valve 5b and the even clutch ( 122) may be connected to the even operation line 51b. The other side of the dual lubrication control line 62a may be connected to the dual lubrication valve 6a. A part of the fluid supplied to the odd clutch 121 through the odd operation valve 5a through the dual lubrication control line 62a or the even clutch 122 through the even operation valve 5b is supplied to the dual lubrication control line 62a. A portion of the fluid may be supplied. Accordingly, the dual lubrication valve 6a can selectively pass the fluid flowing along the dual lubrication line 61a according to the hydraulic pressure of the fluid flowing along the dual lubrication control line 62a.

When the odd operating valve 5a allows the fluid supplied from the hydraulic pump 2 to pass in order to operate the odd clutch 121, or to operate the even clutch 122, the even operating valve ( When 5b) allows the fluid supplied from the hydraulic pump 2 to pass through, the dual lubrication valve 6a is connected to the dual lubrication control line ( 62a) may operate to allow the passage of the fluid supplied from the hydraulic pump 2 by the hydraulic pressure of the fluid supplied to the hydraulic pump 2 . Accordingly, the dual lubrication valve 6a allows the fluid supplied from the hydraulic pump 2 to pass through so that the odd clutch 121 and the even clutch 122 are lubricated. On the other hand, when the odd operation valve 5a and the even operation valve 5b block the passage of the fluid supplied from the hydraulic pump 2, respectively, the dual lubrication valve 6a operates the hydraulic pump 2 operable to block the passage of fluid supplied from

As such, when the fluid is supplied to the odd clutch 121 through the odd operation line 51a or when the fluid is supplied to the even clutch 122 through the even operation line 51b, the dual lubrication line The dual lubrication control line 62a has one side of the odd operation line 51a and the even operation line 51b so that the fluid is supplied to the odd clutch 121 and the even clutch 122 through 61a. In addition to being connected to each, the other end may be connected to the dual lubrication valve 6a.

The dual lubrication valve 6a may include a dual lubrication passing mechanism 63a, a dual lubrication blocking mechanism 64a, a dual lubrication body 65a, and a dual elastic member 66a.

The dual lubrication passage mechanism 63a allows the fluid supplied from the hydraulic pump 2 to pass therethrough. The dual lubrication passage mechanism 63a may be coupled to the dual lubrication body 65a.

The dual lubrication shutoff mechanism 64a blocks the passage of the fluid supplied from the hydraulic pump 2 . The dual lubrication blocking mechanism 64a may be coupled to the dual lubrication body 65a.

The dual lubrication body 65a moves between the dual lubrication position and the dual differential unit value. When the dual lubrication body 65a is positioned at the dual lubrication position, the dual lubrication passage mechanism 63a may be connected to the dual lubrication line 61a. Accordingly, the fluid supplied from the hydraulic pump 2 may be supplied to the odd clutch 121 and the even clutch 122 through the dual lubrication passage mechanism 63a. When the dual lubrication body 65a is positioned at the dual differential unit value, the dual lubrication blocking mechanism 64a may be connected to the dual lubrication line 61a. Accordingly, since the fluid supplied from the hydraulic pump 2 does not pass through the dual lubrication shutoff mechanism 64a, it cannot be supplied to the odd clutch 121 and the even clutch 122.

The dual elastic member 66a elastically presses the dual lubrication body 65a so that the dual lubrication body 65a is positioned at the dual vehicle unit position. The dual elastic member 66a may be implemented as a spring having a predetermined elastic force. The dual elastic member 66a may press one side of the dual lubrication body 65a. The dual lubrication control line 62a may be connected to the other side of the dual lubrication body 65a. Accordingly, the other side of the dual lubrication body 65a may be pressurized by the hydraulic pressure of the fluid flowing along the dual lubrication control line 62a.

The dual lubrication valve 6a can selectively pass the fluid supplied from the hydraulic pump 2 while operating as follows.

First, in order to operate the odd clutch 121 or the even clutch 122, the odd operation valve 5a or the even operation valve 5b allows the fluid supplied from the hydraulic pump 2 to pass through In this case, the dual lubrication body 65a may be moved to the dual lubrication position by the hydraulic pressure of the fluid supplied from the odd operation line 51a or the even operation line 51b to the dual lubrication control line 62a. there is. In this case, the hydraulic pressure of the fluid flowing along the dual lubrication control line 62a may increase to be greater than the elastic force of the dual elastic member 66a. Accordingly, since the dual lubrication passage mechanism 63a is connected to the dual lubrication line 61a, the dual lubrication valve 6a can allow the fluid supplied from the hydraulic pump 2 to pass therethrough. Accordingly, a fluid for lubrication is supplied to the odd clutch 121 and the even clutch 122 .

Next, when the odd operation valve 5a and the even operation valve 5b block the passage of the fluid supplied from the hydraulic pump 2, the dual lubrication body 65a is formed by the dual elastic member 66a It can be moved to the dual car unit value by the elastic force of In this case, the hydraulic pressure of the fluid flowing along the dual lubrication control line 62a may be reduced to be smaller than the elastic force of the dual elastic member 66a. Accordingly, since the dual lubrication shutoff mechanism 64a is connected to the dual lubrication line 61a, the dual lubrication valve 6a can block the passage of the fluid supplied from the hydraulic pump 2 . Accordingly, the fluid for lubrication is not supplied to the odd clutch 121 and the even clutch 122 .

As such, when the odd operation valve 5a permits the passage of the fluid supplied from the hydraulic pump 2 to operate the odd clutch 121 or to operate the even clutch 122, When the actuating valve 5b permits the passage of the fluid supplied from the hydraulic pump 2, the dual lubrication body 65a is disposed in the odd actuating line 51a or the even actuating line 51b. It can be moved to the dual lubrication position by the hydraulic pressure of the fluid supplied to the lubrication control line 62a. On the other hand, when the odd operation valve 5a and the even operation valve 5b block the passage of the fluid supplied from the hydraulic pump 2, respectively, the dual lubrication body 65a is the dual elastic member 66a ) can be moved to the dual car unit value by the elastic force.

Referring to FIG. 7, the hydraulic device 1 for the transmission of the agricultural work vehicle according to the present invention is not connected to the forward/reverse clutch 111 (shown in FIG. 4), but the odd clutch 121 and the even clutch ( 122) may be implemented to be connected only. In this case, the odd operation valve 5a, the even operation valve 5b, and the first lubrication valve 4 may be implemented as follows.

The odd operation valve 5a may supply a fluid to the odd clutch 121 . The odd operation valve 5a may be installed in the odd operation line 51a. The odd operation line 51a may connect the odd operation valve 5a and the odd clutch 121 .

The even operation valve 5b may supply a fluid to the even clutch 122 . The even operation valve (5b) may be installed in the even operation line (51b). The even operation line 51b may connect the even operation valve 5b and the even clutch 122 .

The first lubrication valve 4 may selectively pass the fluid supplied from the hydraulic pump 2 . The first lubrication valve 4 may be installed in the first lubrication line 41 . The first lubrication line 41 may connect each of the odd clutch 121 and the even clutch 122 to the hydraulic pump 2 . One end of the first lubrication line 41 may be connected to the second pump supply line 22 , and the other end may be connected to the odd clutch 121 and the even clutch 122 , respectively. A fluid may be supplied to each of the lubricating parts requiring lubrication in the odd clutch 121 and the lubricating parts requiring lubrication in the even clutch 122 through the first lubrication line 41 .

The first lubrication valve 4 may be installed between one side of the first lubrication line 41 and the other side of the first lubrication line 41 . The first lubrication valve 4 is operated using a portion of the fluid supplied to the odd clutch 121 or the even clutch 122 through the odd operation valve 5a or the even operation valve 5b. By doing so, it is possible to pass the fluid supplied from the hydraulic pump (2).

To this end, the first lubrication control line 42 may be connected to the first lubrication valve 4 . The first lubrication control line 42 has one side connected to the odd operation line 51a between the odd operation valve 5a and the odd clutch 121, and the even operation valve 5b and the even clutch It may be connected to the even operation line (51b) between the (122). The other side of the first lubrication control line 42 may be connected to the first lubrication valve 4 .

When the odd operation valve 5a or the even operation valve 5b allows the fluid supplied from the hydraulic pump 2 to pass through to operate the odd clutch 121 or the even clutch 122, The first lubrication valve 4 may allow the fluid supplied from the hydraulic pump 2 to pass through so that the odd clutch 121 and the even clutch 122 are lubricated. In this case, the first lubrication valve 4 is operated by the hydraulic pressure of the fluid supplied from the odd operation line 51a or the even operation line 51b to the first lubrication control line 42 . ) to allow the passage of fluid supplied from it. On the other hand, when the odd operation valve (5a) and the even operation valve (5b) block the passage of the fluid supplied from the hydraulic pump (2), the first lubrication valve (4) is the hydraulic pump (2) operable to block the passage of fluid supplied from

As such, when the fluid is supplied to the odd clutch 121 through the odd operation line 51a or when the fluid is supplied to the even clutch 122 through the even operation line 51b, the first lubrication The first lubrication control line 42 has one side of the odd operation line 51a and the even operation line ( 51b) may be connected to each, and the other end may be connected to the first lubrication valve 4 .

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

1: Hydraulic system for transmission of agricultural work vehicle 2: Hydraulic pump
3: first operation valve 4: first lubrication valve
5: second operation valve 6: second lubrication valve
7: pressure control valve 100: transmission
110: first clutch 120: second clutch

Claims (13)

A hydraulic pump for supplying a fluid to the transmission of the agricultural work vehicle;
a first operating line connecting the first clutch and the hydraulic pump so that a fluid to be used as a working fluid is supplied to the first clutch of the transmission;
a first lubrication line connecting the first clutch and the hydraulic pump so that a fluid to be used as a lubricating fluid is supplied to the first clutch;
a first operating valve installed in the first operating line and selectively passing the fluid supplied from the hydraulic pump;
a first lubrication valve installed in the first lubrication line and selectively passing the fluid supplied from the hydraulic pump; and
a first lubrication control line having one side connected to the first operating line between the first operating valve and the first clutch and the other side connected to the first lubrication valve,
A portion of the fluid supplied to the first clutch through the first operation valve is supplied to the first lubrication control line,
and the first lubrication valve selectively passes the fluid flowing along the first lubrication line according to the hydraulic pressure of the fluid flowing along the first lubrication control line. According to claim 1,
When the first operating valve permits the passage of the fluid supplied from the hydraulic pump in order to operate the first clutch, the first lubrication valve is a fluid supplied from the first operating line to the first lubrication control line. Operates to allow the passage of the fluid supplied from the hydraulic pump by the hydraulic pressure of
When the first operating valve blocks the passage of the fluid supplied from the hydraulic pump, the first lubrication valve operates to block the passage of the fluid supplied from the hydraulic pump. hydraulics. According to claim 1,
The first lubrication valve,
a first lubrication passage mechanism allowing passage of the fluid supplied from the hydraulic pump;
a first lubrication blocking mechanism for blocking the passage of the fluid supplied from the hydraulic pump;
A first lubrication position in which the first lubrication passage mechanism and the first lubrication cut-off mechanism are coupled, the first lubrication passage mechanism is connected to the first lubrication line, and the first lubrication cut-off mechanism are connected to the first lubrication line a first lubricating body moving between connected first unit values; and
and a first elastic member for elastically pressing the first lubricating body so that the first lubricating body is positioned at the first unit value;
When the first operation valve permits the passage of the fluid supplied from the hydraulic pump in order to operate the first clutch, the first lubrication body is the fluid supplied from the first operation line to the first lubrication control line. is moved to the first lubrication position by the hydraulic pressure of
When the first operating valve blocks the passage of the fluid supplied from the hydraulic pump, the first lubrication body is moved to the first unit value by the elastic force of the first elastic member. of hydraulics for transmission. According to claim 1,
a first pump supply line having one end connected to the hydraulic pump and the other end connected to the first operation line;
a second pump supply line having one side connected to the first pump supply line and the other side connected to the first lubrication line; and
and a pressure control valve installed in the second pump supply line and selectively passing the fluid flowing along the second pump supply line according to the hydraulic pressure of the fluid flowing along the first operation line. Hydraulic system for transmission of agricultural work vehicles. According to claim 1,
When the first clutch is a forward and backward clutch,
The first operation valve includes a forward fastening valve for supplying a fluid so that the forward/reverse clutch performs forward shifting, and a reverse fastening valve for supplying a fluid so that the forward/reverse clutch performs a reverse shift,
The first operation line includes a forward operation line connecting the forward fastening valve and the forward and backward clutches, and a reverse operation line connecting the reverse fastening valve and the forward and backward clutches,
The first lubrication control line is connected to the forward operation line between the forward fastening valve and the forward and backward clutches, and is connected to the reverse operation line between the reverse fastening valve and the forward and backward clutches. Hydraulic system for transmission of agricultural work vehicles. According to claim 1,
When the transmission is a dual clutch transmission (Dual Clutch Transmission),
The first operation valve includes an odd operation valve for supplying a fluid to an ODD clutch of the transmission, and an even operation valve for supplying a fluid to an EVEN clutch of the transmission,
The first operating line includes an odd operating line connecting the odd operating valve and the odd clutch, and an even operating line connecting the even operating valve and the even clutch,
The first lubrication control line is connected to the odd operation line between the odd operation valve and the odd clutch, and is connected to the even operation line between the even operation valve and the even clutch. Hydraulics for the transmission of a vehicle. The method of claim 1,
a second operating line connecting the second clutch and the hydraulic pump so that a fluid to be used as a working fluid is supplied to the second clutch of the transmission;
a second lubrication line connecting the second clutch and the hydraulic pump so that a fluid to be used as a lubricating fluid is supplied to the second clutch;
a second operation valve installed in the second operation line and selectively passing the fluid supplied from the hydraulic pump;
a second lubrication valve installed in the second lubrication line and selectively passing the fluid supplied from the hydraulic pump; and
a second lubrication control line having one side connected to the second operating line between the second operating valve and the second clutch and the other side connected to the second lubrication valve,
A portion of the fluid supplied to the second clutch through the second operation valve is supplied to the second lubrication control line,
and the second lubrication valve selectively passes the fluid flowing along the second lubrication line according to the hydraulic pressure of the fluid flowing along the second lubrication control line. 8. The method of claim 7,
When the second actuating valve permits the passage of the fluid supplied from the hydraulic pump to operate the second clutch, the second lubrication valve is a fluid supplied from the second actuating line to the second lubrication control line. Operates to allow the passage of the fluid supplied from the hydraulic pump by the hydraulic pressure of
When the second operation valve blocks the passage of the fluid supplied from the hydraulic pump, the second lubrication valve operates to block the passage of the fluid supplied from the hydraulic pump. hydraulics. 8. The method of claim 7,
The second lubrication valve is
a second lubrication passage mechanism allowing passage of the fluid supplied from the hydraulic pump;
a second lubrication blocking mechanism for blocking the passage of the fluid supplied from the hydraulic pump;
A second lubrication position at which the second lubrication passage mechanism and the second lubrication shutoff mechanism are coupled, the second lubrication passage mechanism is connected to the second lubrication line, and the second lubrication cutoff mechanism is connected to the second lubrication line a second lubrication body moving between the connected second unit values; and
and a second elastic member for elastically pressing the second lubricating body so that the second lubricating body is positioned at the second unit value;
When the second actuating valve permits the passage of the fluid supplied from the hydraulic pump to operate the second clutch, the second lubrication body is the fluid supplied from the second actuating line to the second lubrication control line. is moved to the second lubrication position by the hydraulic pressure of
When the second operation valve blocks the passage of the fluid supplied from the hydraulic pump, the second lubrication body is moved to the second unit value by the elastic force of the second elastic member. of hydraulics for transmission. 8. The method of claim 7,
a first pump supply line having one side connected to the hydraulic pump and the other side connected to each of the first operating line and the second operating line;
a second pump supply line having one side connected to the first pump supply line and the other side connected to each of the first lubrication line and the second lubrication line; and
a pressure control valve installed in the second pump supply line and selectively passing the fluid flowing along the second pump supply line according to the hydraulic pressure of the fluid flowing along the first and second operation lines; A hydraulic system for a transmission of an agricultural work vehicle, characterized in that it comprises. According to claim 1,
When the transmission is a dual clutch transmission (Dual Clutch Transmission),
an ODD operation line connecting the ODD clutch and the hydraulic pump so that a fluid to be used as a working fluid is supplied to the ODD clutch of the transmission;
an even operation line connecting the even clutch and the hydraulic pump so that a fluid to be used as a working fluid is supplied to an EVEN clutch of the transmission;
a dual lubrication line connecting each of the odd clutch and the even clutch to the hydraulic pump so that a fluid to be used as a lubricating fluid is supplied to the odd clutch and the even clutch;
an odd operation valve installed in the odd operation line and selectively passing the fluid supplied from the hydraulic pump;
an even operation valve installed in the even operation line and selectively passing the fluid supplied from the hydraulic pump;
a dual lubrication valve installed in the dual lubrication line and selectively passing the fluid supplied from the hydraulic pump; and
Dual lubrication having one side connected to the odd operating line between the odd operating valve and the odd clutch, and connected to the even operating line between the even operating valve and the even clutch, and the other side connected to the dual lubrication valve including a control line;
A part of the fluid supplied to the odd clutch through the odd operation valve or a part of the fluid supplied to the even clutch through the even operation valve is supplied to the dual lubrication control line,
and the dual lubrication valve selectively passes the fluid flowing along the dual lubrication line according to the hydraulic pressure of the fluid flowing along the dual lubrication control line. 12. The method of claim 11,
When the odd operation valve allows the passage of the fluid supplied from the hydraulic pump to operate the odd clutch, or the even operation valve allows the passage of the fluid supplied from the hydraulic pump to operate the even clutch In this case, the dual lubrication valve operates to allow passage of the fluid supplied from the hydraulic pump by the hydraulic pressure of the fluid supplied from the odd operation line or the even operation line to the dual lubrication control line,
Agricultural work, characterized in that when the odd operation valve and the even operation valve block the passage of the fluid supplied from the hydraulic pump, the dual lubrication valve operates to block the passage of the fluid supplied from the hydraulic pump Hydraulics for the transmission of a vehicle. 12. The method of claim 11,
The dual lubrication valve is
a dual lubrication passage mechanism allowing passage of the fluid supplied from the hydraulic pump;
a dual lubrication shut-off mechanism for blocking the passage of the fluid supplied from the hydraulic pump;
The dual lubrication pass-through mechanism and the dual lubrication cut-off mechanism are coupled, and the dual lubrication pass-through mechanism moves between a dual lubrication position connected to the dual lubrication line and a dual differential unit value where the dual lubrication cut-off mechanism is connected to the dual lubrication line dual lubrication body; and
and a dual elastic member for elastically pressing the dual lubrication body so that the dual lubrication body is positioned at the dual vehicle unit value;
When the odd operation valve allows the passage of the fluid supplied from the hydraulic pump to operate the odd clutch, or the even operation valve allows the passage of the fluid supplied from the hydraulic pump to operate the even clutch In this case, the dual lubrication body is moved to the dual lubrication position by the hydraulic pressure of the fluid supplied from the odd operation line or the even operation line to the dual lubrication control line,
When the odd operation valve and the even operation valve respectively block the passage of the fluid supplied from the hydraulic pump, the dual lubrication body is moved to the dual vehicle unit value by the elastic force of the dual elastic member. Hydraulic system for transmission of work vehicle.

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