KR20200119008A - Hydraulic Apparatus of Agricultural Vehicle - Google Patents

Abstract

The present invention relates to a hydraulic apparatus of an agricultural work vehicle, which comprises: a hydraulic pump supplying a fluid; an operation line for supplying the fluid supplied from the hydraulic pump to an operation part operated using a fluid among vehicle parts of the agricultural work vehicle; a lubrication line for supplying the fluid supplied from the hydraulic pump to a lubrication part which performs lubrication using the fluid among the vehicle parts; a switching unit for switching the fluid supplied by the hydraulic pump to be supplied to at least one of the operation line and the lubrication line; and a supply line having one side connected to the hydraulic pump and the other side connected to the switching unit. Therefore, the hydraulic apparatus of the present invention can reduce the consumption of power generated by an engine for supplying an operating fluid and a lubricating fluid.

Description

Hydraulic Apparatus of Agricultural Vehicle{Hydraulic Apparatus of Agricultural Vehicle}

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

Agricultural work vehicles are used to cultivate crops necessary for human life by using the land. For example, a combine, a tractor, and a rice transplanter correspond to agricultural work vehicles. The combine is the work of harvesting and threshing crops such as rice, barley, wheat, and soybeans. Tractors use traction to perform the work required to grow crops. The rice transplanter carries out the work of transplanting seedlings grown in ponds or nursery boxes into rice fields.

Such an agricultural work vehicle includes a hydraulic device for supplying a fluid such as oil. The fluid supplied by the hydraulic device is used for lubrication and operation of vehicle parts of the agricultural work vehicle.

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

Referring to FIG. 1, the hydraulic device 100 of an agricultural work vehicle according to the prior art includes an operation line 110, a lubrication line 120, a first hydraulic pump 130, and a second hydraulic pump 140. do.

The operating line 110 flows the fluid supplied from the first hydraulic pump 130. The operating line 110 is connected to each of the first hydraulic pump 130 and the vehicle parts 200 included in the agricultural work vehicle (not shown). The operation line 110 is connected to an operation part 210 operated using a fluid among the vehicle parts 200. After the fluid supplied by the first hydraulic pump 130 is supplied to the operation part 210 through the operation line 110, it is used as a working fluid for operating the operation part 210.

The lubrication line 120 flows the fluid supplied from the second hydraulic pump 140. The lubrication line 120 is connected to each of the second hydraulic pump 140 and the vehicle component 200. The lubrication line 120 is connected to a lubrication component 220 that lubricates the vehicle component 200 using a fluid. After the fluid supplied from the second hydraulic pump 140 is supplied to the lubrication component 220 through the lubrication line 120, it is used as a lubricant fluid to lubricate the lubrication component 220.

Here, the hydraulic device 100 for an agricultural work vehicle according to the prior art is provided with a first hydraulic pump 130 for supplying the working fluid and a second hydraulic pump 140 for supplying the lubricating fluid. Is implemented. The first hydraulic pump 130 and the second hydraulic pump 140 are each operated by power generated by an engine (not shown) of the agricultural work vehicle. Accordingly, the hydraulic device 100 of an agricultural work vehicle according to the prior art must separately operate the first hydraulic pump 130 and the second hydraulic pump 140 to supply the working fluid and the lubricating fluid. Therefore, there is a problem in that the consumption of power generated by the engine is large.

The present invention has been devised to solve the above-described problems, and is to provide a hydraulic system for an agricultural work vehicle capable of reducing consumption of power generated by an engine to supply a working fluid and a lubricating fluid.

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

The hydraulic device for an agricultural work vehicle according to the present invention includes a hydraulic pump for supplying a fluid; An operation line for supplying a fluid supplied from the hydraulic pump to an operation part operated using a fluid among vehicle parts of an agricultural work vehicle; A lubrication line for supplying the fluid supplied from the hydraulic pump to a lubrication component that lubricates the vehicle parts using a fluid; A switching unit for switching the fluid supplied from the hydraulic pump to be supplied to at least one of the operating line and the lubrication line; And a supply line having one side connected to the hydraulic pump and the other side connected to the switching unit.

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

The present invention is implemented to supply fluid to at least one of an operation part and a lubricating part by using one hydraulic pump. Accordingly, the present invention can improve power transmission efficiency by reducing power consumption for supplying fluid to the actuating part and the lubricating part.

The present invention is implemented so that fluid can be selectively supplied to one that requires fluid from among operating parts and lubricating parts using one hydraulic pump. Accordingly, the present invention can be implemented to supply fluid smoothly without a lack of flow rate for the fluid, even though the present invention is implemented as a structure for supplying fluid using one hydraulic pump.

The present invention is implemented to supply fluid to at least one of an operation part and a lubricating part using one hydraulic pump, so that the structure may be concisely implemented and the ease of arrangement of the hydraulic pump may be improved.

1 is a schematic block diagram of a hydraulic system of an agricultural work vehicle according to the prior art
1 and 2 are schematic block diagrams of a hydraulic system of an agricultural work vehicle according to the present invention
4 to 6 are schematic hydraulic circuit diagrams for explaining a switching unit in the hydraulic system of an agricultural work vehicle according to the present invention
7 is a schematic hydraulic circuit diagram of an embodiment in which a switching unit includes a proportional control valve in the hydraulic system of an agricultural work vehicle according to the present invention
Figure 8 is a schematic hydraulic circuit diagram for a modified embodiment of the switching unit in the hydraulic system of the agricultural work vehicle according to the present invention
9 is a schematic block diagram of an embodiment in which the hydraulic device of the agricultural work vehicle according to the present invention includes a flow rate selection unit
10 and 11 are schematic hydraulic circuit diagrams for explaining the flow rate selection unit in the hydraulic system of the agricultural work vehicle according to the present invention
12 is a schematic block diagram of an embodiment in which the hydraulic device of the agricultural work vehicle according to the present invention includes a flow rate selection unit and a distribution unit
13 to 15 are schematic hydraulic circuit diagrams for explaining the distribution unit in the hydraulic system of the agricultural work vehicle according to the present invention

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

In FIGS. 4 to 6, 10, 11, 13, and 14, the flow direction of the fluid is indicated by arrows. The solid arrows indicated on the solid hydraulic lines indicate the flow direction of the fluid supplied by the hydraulic pump and the fluid supplied to the operating parts. The dotted arrows indicated on the solid hydraulic lines indicate the flow direction of the fluid supplied to the lubricating parts. The arrows in the dashed-dotted line indicated on the solid hydraulic line indicate the flow direction of the fluid discharged to the storage tank.

2 and 3, the hydraulic device 1 of the agricultural work vehicle according to the present invention is provided in an agricultural work vehicle 100 such as a tractor, a combine, and a rice transplanter. The agricultural work vehicle 100 includes parts that perform operation, lubrication, and the like using a fluid such as oil. For example, the agricultural work vehicle 100 may include an operating part 20 that operates using a fluid and a lubrication component 30 that lubricates using a fluid. The operation part 20 and the lubrication part 30 may be part of a modularized part that performs one function. For example, in the transmission of the agricultural work vehicle 100, the operation part 20 is operated by using a fluid such as a clutch and an actuator, and the lubrication part 30 is the It may be lubrication using a fluid such as a clutch. The actuating part 20 and the lubricating part 30 may be parts of modularized parts that perform different functions.

With respect to these operating parts 20 and lubrication parts 30, the hydraulic system 1 of the agricultural work vehicle according to the present invention serves to supply fluid. To this end, the hydraulic device 1 of the agricultural work vehicle according to the present invention includes a hydraulic pump 2 for supplying fluid, a supply line 3 connected to the hydraulic pump 2, and supplied from the hydraulic pump 2 An operating line 4 for supplying fluid to the actuating part 20, a lubrication line 5 for supplying the fluid supplied from the hydraulic pump 2 to the lubricating part 30, and the hydraulic pump ( It includes a switching unit (6) for switching the fluid supplied by 2) to be supplied to at least one of the operating line (4) and the lubrication line (5).

Since the switching unit 6 switches to supply fluid to at least one of the operating line 4 and the lubrication line 5, the hydraulic device 1 of the agricultural work vehicle according to the present invention is provided with the operation part 20 ) And the lubricating part 30 to supply a fluid to at least one. Accordingly, the hydraulic device 1 of the agricultural work vehicle according to the present invention can achieve the following effects.

First, since the hydraulic device 1 of the agricultural work vehicle according to the present invention can supply fluid to at least one of the operating part 20 and the lubricating part 30 by using one hydraulic pump 2, the It is possible to reduce the consumption of power for supplying fluid to the actuating part 20 and the lubricating part 30. When the hydraulic pump 2 is driven by an engine (not shown) of the agricultural work vehicle 100, power consumption of the engine may be reduced.

Second, the hydraulic device 1 of the agricultural work vehicle according to the present invention can selectively supply fluid to each of the operating parts 20 and the lubricating parts 30 using one hydraulic pump 2. For example, when the operating amount of the actuating part 20 is increased and all fluid supplied from the hydraulic pump 2 is to be supplied to the actuating part 20, the switching part 6 is the actuating part 20 It can be switched so that only the fluid is supplied. For example, when the operating amount of the actuating part 20 is in a normal state and the fluid supplied from the hydraulic pump 2 can be supplied to both the actuating part 20 and the lubricating part 30, the switching part 6 Can be switched so that fluid is supplied to both the lubrication part 30 and the operation part 20. For example, when the operation of the actuating part 20 is in a standby state and there is no need to supply the fluid to the actuating part 20, the switching unit 6 can switch so that the fluid is supplied only to the lubricating part 30. have. Therefore, even if the hydraulic device 1 of the agricultural work vehicle according to the present invention is implemented in a structure that supplies fluid using one hydraulic pump 2, it can be implemented to supply fluid smoothly without lack of flow rate for the fluid. have.

Third, the hydraulic system 1 of the agricultural work vehicle according to the present invention can omit one hydraulic pump and an auxiliary part for the corresponding hydraulic pump when compared with the prior art, so that the structure can be concisely implemented and the arrangement Ease of use can be improved.

Hereinafter, the hydraulic pump 2, the supply line 3, the operation line 4, the lubrication line 5, and the switching unit 6 will be described in detail with reference to the accompanying drawings.

2 to 4, the hydraulic pump 2 supplies fluid. The fluid may be oil. The hydraulic pump 2 may be driven by the engine. The hydraulic pump 2 may be connected to the switching unit 6 through the supply line 3. The hydraulic pump 2 may be connected to the operating line 4 through the supply line 3. The hydraulic pump 2 may be a fixed pump supplying a fluid having a predetermined flow rate. The hydraulic pump 2 may be a variable pump that adjusts and supplies a fluid flow rate under control of a controller (not shown).

2 to 4, the supply line 3 is connected to the hydraulic pump 2 and the conversion unit 6, respectively. One side of the supply line 3 may be connected to the hydraulic pump 2 and the other side of the supply line 3 may be connected to the switching unit 6. The operation line 4 may be connected to the supply line 3. The supply line 3 may be implemented in a tubular structure such as a hose or a pipe. The supply line 3 may be implemented as a passage structure in which grooves and holes are processed inside a structure (not shown). The supply line 3 may be implemented in a form in which the tube structure and the passage structure are combined. That is, the supply line 3 may be implemented in the form of the tube structure, the passage structure, or a combination of the tube structure and the passage structure. In the hydraulic system (1) of an agricultural work vehicle according to the present invention, a configuration corresponding to a line providing a passage through which fluid can flow is a structure in which the tube structure, the passage structure, or a combination of the tube structure and the passage structure Can be implemented as

2 to 4, the operation line 4 supplies the fluid supplied from the hydraulic pump 2 to the operation part 20. The operation line 4 may be connected to the operation part 20. The fluid supplied to the actuating part 20 through the actuating line 4 may be used as a working fluid for actuating the actuating part 20.

The operation line 4 may be connected to the supply line 3. The operation line 4 may be directly connected to the supply line 3. One side of the operation line 4 may be directly connected to the supply line 3 and the other side of the operation line 4 may be connected to the operation part 20. Accordingly, after some of the fluid flowing along the supply line 3 is branched, it may be supplied to the operation part 20 through the operation line 4. The operation line 4 may be connected to the supply line 3 between one side of the supply line 3 and the other side of the supply line 3. Accordingly, as shown in FIG. 4, even when the switching unit 6 blocks the fluid from passing through, the fluid supplied by the hydraulic pump 2 is applied to the supply line 3 and the operation line 4. ) Can be supplied to the operation part 20 through.

2 to 4, the lubrication line 5 supplies the fluid supplied from the hydraulic pump 2 to the lubrication component 30. The lubrication line 5 may be connected to the lubrication component 30. The fluid supplied to the lubrication component 30 through the lubrication line 5 may be used as a lubrication fluid that lubricates the lubrication component 30.

The lubrication line 5 may be connected to the conversion part 6. One side of the lubrication line 5 may be connected to the conversion part 6 and the other side of the lubrication line 5 may be connected to the lubrication component 30. The lubrication line 5 may be connected to the outlet side of the conversion part 6. In this case, the supply line 3 may be connected to the inlet side of the switching unit 6. Accordingly, when the switching unit 6 connects the supply line 3 and the lubrication line 5, the fluid supplied by the hydraulic pump 2 is transferred to the supply line 3 and the lubrication line 5 ) May be supplied to the lubricating part 30.

2 to 8, the switching unit 6 switches the fluid supplied by the hydraulic pump 2 to be supplied to at least one of the operating line 4 and the lubrication line 5. The conversion part 6 may be arranged to be connected to each of the supply line 3 and the lubrication line 5 between the supply line 3 and the lubrication line 5.

The conversion unit 6 may include a first conversion mechanism 61, a second conversion mechanism 62, a third conversion mechanism 63, and a conversion body 64.

The first switching mechanism 61 converts the fluid supplied by the hydraulic pump 2 to be supplied only to the operating part 20 through the operating line 4. The first switching mechanism 61 may include first switching passages connected to each of the supply line 3 and the lubrication line 5. The first switching passage connected to the supply line 3 and the first switching passage connected to the lubrication line 5 may be disposed to be spaced apart from each other so as not to be in fluid communication. Accordingly, as shown in FIG. 4, when the first switching mechanism 61 is arranged to be connected to each of the supply line 3 and the lubrication line 5, the first switching mechanism 61 It is possible to block the fluid from flowing from the line 3 to the lubrication line 5. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may be supplied only to the operation part 20 through the operation line 4.

The first conversion mechanism 61 may also be connected to the storage tank 40. The storage tank 40 is to store fluid. In this case, the hydraulic device 1 of the agricultural work vehicle according to the present invention may include a discharge line 7 for discharging the fluid supplied from the hydraulic pump 2 to the storage tank 40. One side of the discharge line 7 may be connected to the conversion unit 6 and the other side may be connected to the storage tank 40. One side of the discharge line 7 may be connected to the first switching mechanism 61. Accordingly, the first switching mechanism 61 may be connected to the storage tank 40 through the discharge line 7. In this case, the first switching mechanism 61 may include a first switching passage for connecting to the discharge line 7. The first conversion channel to be connected to the discharge line (7) is not in fluid communication with each of the first conversion channel to be connected to the supply line (3) and the first conversion channel to be connected to the lubrication line (5). They can be placed apart from each other. Accordingly, when the first switching mechanism 61 is arranged to be connected to each of the supply line 3, the lubrication line 5, and the discharge line 7 as shown in FIG. 4, the first The switching mechanism 61 may block the fluid from flowing from the supply line 3 to the lubrication line 5 and the discharge line 7. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may be supplied only to the operation part 20 through the operation line 4.

The second switching mechanism 62 supplies the fluid supplied from the hydraulic pump 2 to the operation part 20 through the operation line 4 and the lubricating part ( 30). The second conversion mechanism 62 may include second conversion passages connected to each of the supply line 3 and the lubrication line 5. The second conversion flow path for connection to the supply line 3 and the second conversion flow path for connection to the lubrication line 5 may be arranged to be connected to each other in fluid communication. Accordingly, as shown in FIG. 5, when the second switching mechanism 62 is arranged to be connected to each of the supply line 3 and the lubrication line 5, the second switching mechanism 62 It is possible to allow fluid to flow from line 3 to lubrication line 5. Accordingly, the fluid supplied by the hydraulic pump 2 can be supplied to the lubrication component 30 through the supply line 3 and the lubrication line 5. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may also be supplied to the operation part 20 through the operation line 4.

The second conversion mechanism 62 may also be connected to the storage tank 40 through the discharge line 7. In this case, the second conversion mechanism 62 may include a second conversion passage to be connected to the discharge line 7. The second conversion channel to be connected to the discharge line (7) is not in fluid communication with each of the second conversion channel to be connected to the supply line (3) and the second conversion channel to be connected to the lubrication line (5). They can be placed apart from each other. Accordingly, as shown in FIG. 5, when the second switching mechanism 62 is arranged to be connected to each of the supply line 3, the lubrication line 5, and the discharge line 7, the second The switching mechanism 62 allows fluid to flow from the supply line 3 to the lubrication line 5 and blocks the fluid from flowing from the supply line 3 to the discharge line 7. have. Accordingly, the fluid supplied by the hydraulic pump 2 can be supplied to the lubrication component 30 through the supply line 3 and the lubrication line 5. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may also be supplied to the operation part 20 through the operation line 4.

The third switching mechanism 63 converts the fluid supplied from the hydraulic pump 2 to be supplied to the lubrication component 30 through the lubrication line 5. The third switching mechanism 63 may include third switching passages connected to each of the supply line 3 and the lubrication line 5. A third conversion flow path connected to the supply line 3 and a third conversion flow path connected to the lubrication line 5 may be arranged to be connected to each other so as to be in fluid communication. Accordingly, as shown in FIG. 6, when the third switching mechanism 63 is arranged to be connected to each of the supply line 3 and the lubrication line 5, the third switching mechanism 63 It is possible to allow fluid to flow from line 3 to lubrication line 5.

The third conversion mechanism 63 may also be connected to the storage tank 40 through the discharge line 7. In this case, the third conversion mechanism 63 may include a third conversion passage to be connected to the discharge line 7. A third conversion flow path connected to the discharge line 7 and a third conversion flow path connected to the supply line 3 may be connected to each other so as to be in fluid communication. The third conversion channels for connecting the discharge line 7 and the supply line 3 and the third conversion channels for connecting the lubricating part 5 and the supply line 3 are They can be arranged spaced apart. Accordingly, when the third switching mechanism 63 is arranged to be connected to each of the supply line 3, the lubrication line 5, and the discharge line 7 as shown in FIG. 6, the third The conversion mechanism 63 may allow fluid to flow from the supply line 3 to the lubrication line 5 and the discharge line 7. Therefore, the fluid supplied by the hydraulic pump 2 can be supplied to the lubricating part 30 through the supply line 3 and the lubricating line 5, and the supply line 3 and the discharge line It may be discharged to the storage tank 40 through (7). In this case, even if the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is transferred to the storage tank 40 Due to the pressure difference between the operating parts 20, it cannot flow to the operating line 4. This is because the pressure of the storage tank 40 is smaller than the pressure of the operation part 20. Accordingly, when the third switching mechanism 63 is arranged to be connected to each of the supply line 3, the lubrication line 5, and the discharge line 7, the fluid supplied by the hydraulic pump 2 Is supplied to the lubrication part 30 and discharged to the storage tank 40, and is not supplied to the operation part 20.

The conversion body 64 is a combination of the first conversion mechanism 61, the second conversion mechanism 62, and the third conversion mechanism 63. The first conversion mechanism 61, the second conversion mechanism 62, and the third conversion mechanism 63 may be arranged side by side along a direction in which the conversion body 64 moves. The switching body 64 may be moved between a first switching position, a second switching position, and a third switching position.

As shown in FIG. 4, when the conversion body 64 is located in the first conversion position, the first conversion mechanism 61 may be connected to the supply line 3 and the lubrication line 5. In this case, the first switching mechanism 61 may block the fluid from flowing from the supply line 3 to the lubrication line 5. Accordingly, the switching unit 6 can switch so that the fluid supplied by the hydraulic pump 2 is supplied only to the operation part 20 through the operation line 4.

When the discharge line 7 is connected to the outlet side of the switching unit 6, when the switching body 64 is located at the first switching position, the first switching mechanism 61 is connected to the supply line 3 ), the lubrication line 5, and the discharge line 7 may be connected. In this case, the first switching mechanism 61 may block the fluid from flowing from the supply line 3 to the discharge line 7. Looking at this in detail, it is as follows.

First, as shown in FIG. 4, the supply line 3 may include a first branch line 31 and a second branch line 32 connected to the inlet side of the switching unit 6. The first branch line 31 is for being connected to the lubrication line 5 through the switching part 6. The second branch line 32 is for being connected to the discharge line 7 through the switching part 6.

Next, the first switching mechanism 61 is a first switching passage connected to the first branch line 31, a first switching passage connected to the lubrication line 5, and the second branch line 32 ), and a first conversion channel to be connected to the discharge line 7. The first conversion passages may be disposed to be spaced apart from each other so as not to be in fluid communication.

Accordingly, when the switching body 64 is located in the first switching position, the first switching mechanism 61 prevents the fluid from flowing from the first branch line 31 to the lubrication line 5. The connection between the first branch line 31 and the lubrication line 5 may be blocked. In addition, the first switching mechanism 61 makes a connection between the second branch line 32 and the discharge line 7 so that fluid does not flow from the second branch line 32 to the discharge line 7. Can be blocked. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may be supplied only to the operation part 20 through the operation line 4. The operation line 3 may be connected to the supply line 3 at a point before the supply line 3 is divided into the first branch line 31 and the second branch line 32.

On the other hand, as shown in FIG. 8, when the supply line 3 is not branched and is implemented as a single hydraulic line, the first switching mechanism 61 is a first switching device to be connected to the supply line 3. It may include a flow path, a first conversion flow path to be connected to the lubrication line 5, and a first conversion flow path to be connected to the discharge line (7). The first conversion passages may be disposed to be spaced apart from each other so as not to be in fluid communication. Accordingly, when the switching body 64 is located in the first switching position, the first switching mechanism 61 prevents the fluid from flowing from the supply line 3 to the lubrication line 5. It is possible to block the connection between (3) and the lubrication line (5). In addition, the first switching mechanism 61 may block a connection between the supply line 3 and the discharge line 7 so that the fluid does not flow from the supply line 3 to the discharge line 7. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may be supplied only to the operation part 20 through the operation line 4.

As described above, when the conversion body 64 is located in the first switching position, the fluid supplied by the hydraulic pump 2 is supplied only to the operating part 20, and the lubrication part 30 and the It is not supplied to the storage tank 40.

As shown in FIG. 5, when the conversion body 64 is located in the second conversion position, the second conversion mechanism 62 may be connected to the supply line 3 and the lubrication line 5. In this case, the second switching mechanism 62 may allow a fluid to flow from the supply line 3 to the lubrication line 5. Accordingly, the switching unit 6 supplies the fluid supplied from the hydraulic pump 2 to the lubricating part 30 through the lubricating line 5 and the operation part 6 through the actuating line 4. Can be switched to supply to (20).

When the discharge line 7 is connected to the outlet side of the switching unit 6, when the switching body 64 is located in the second switching position, the second switching mechanism 62 is connected to the supply line 3 ), the lubrication line 5, and the discharge line 7 may be connected. In this case, the second switching mechanism 62 may block the fluid from flowing from the supply line 3 to the discharge line 7. Looking at this in detail, it is as follows.

First, as shown in FIG. 5, the second conversion mechanism 62 is a second conversion flow path for connecting to the first branch line 31, and a second conversion flow path for connection to the lubrication line 5 , A second switching passage connected to the second branch line 32, and a second switching passage connected to the discharge line 7. The second switching passage for connecting to the first branch line 31 and the second switching passage for connecting to the lubrication line 5 may be arranged to be connected to each other so as to be in fluid communication. The second switching passage connected to the second branch line 32 and the second switching passage connected to the discharge line 7 may be disposed to be spaced apart from each other so as not to be in fluid communication. Accordingly, when the switching body 64 is located in the second switching position, the second switching mechanism 62 allows the fluid to flow from the first branch line 31 to the lubrication line 5. The first branch line 31 and the lubrication line 5 may be connected. In addition, the second switching mechanism 62 makes a connection between the second branch line 32 and the discharge line 7 so that the fluid does not flow from the second branch line 32 to the discharge line 7. Can be blocked. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may also be supplied to the operation part 20 through the operation line 4.

Meanwhile, as shown in FIG. 8, when the supply line 3 is not branched and is implemented as one hydraulic line, the second switching mechanism 62 is a second switching device for connecting to the supply line 3. It may include a flow path, a second conversion flow path to be connected to the lubrication line 5, and a second conversion flow path to be connected to the discharge line (7). The second conversion flow path for connection to the supply line 3 and the second conversion flow path for connection to the lubrication line 5 may be arranged to be connected to each other so as to be in fluid communication. The second conversion flow path connected to the supply line 3 and the second conversion flow path connected to the lubrication line 5 do not allow fluid communication with the third conversion flow path connected to the discharge line 7. They can be arranged spaced apart. Accordingly, when the switching body 64 is located in the second switching position, the second switching mechanism 62 allows the supply line to flow fluid from the supply line 3 to the lubrication line 5 ( 3) and the lubrication line 5 can be connected. In addition, the second switching mechanism 62 may block a connection between the supply line 3 and the discharge line 7 to prevent fluid from flowing from the supply line 3 to the discharge line 7. In this case, since the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is connected to the supply line 3 It may also be supplied to the operation part 20 through the operation line 4.

As described above, when the conversion body 64 is located in the second switching position, the fluid supplied by the hydraulic pump 2 is supplied to the operation part 20 and the lubrication part 3, and the storage It is not supplied to the tank 40.

As shown in FIG. 6, when the conversion body 64 is located in the third conversion position, the third conversion mechanism 63 may be connected to the supply line 3 and the lubrication line 5. In this case, the third switching mechanism 63 may allow a fluid to flow from the supply line 3 to the lubrication line 5. Accordingly, the switching unit 6 can switch the fluid supplied by the hydraulic pump 2 to be supplied to the lubrication component 30 through the lubrication line 5.

When the discharge line 7 is connected to the outlet side of the switching unit 6, when the switching body 64 is located in the third switching position, the third switching mechanism 63 is connected to the supply line 3 ), the lubrication line 5, and the discharge line 7 may be connected. In this case, the third switching mechanism 63 may allow a fluid to flow from the supply line 3 to the discharge line 7. Looking at this in detail, it is as follows.

As shown in FIG. 6, the third conversion mechanism 63 is a third conversion flow path for connecting to the first branch line 31, a third conversion flow path for connection to the lubrication line 5, the It may include a third switching passage for connecting to the second branch line 32 and a third switching passage for connecting to the discharge line 7. A third switching passage connected to the first branch line 31 and a third switching passage connected to the lubrication line 5 may be arranged to be connected to each other so as to be in fluid communication. A third switching passage connected to the second branch line 32 and a third switching passage connected to the discharge line 7 may be arranged to be connected to each other so as to be in fluid communication. Accordingly, when the switching main body 64 is located in the third switching position, the third switching mechanism 63 allows the fluid to flow from the first branch line 31 to the lubrication line 5. The first branch line 31 and the lubrication line 5 may be connected. In addition, the third switching mechanism 63 may connect the second branch line 32 and the discharge line 7 so that fluid flows from the second branch line 32 to the discharge line 7. . Therefore, even if the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is the storage tank 40 and the Due to the difference in pressure between the operating parts 20, it may not flow to the operating line 4 and may be discharged to the storage tank 40 through the discharge line 7. This is because the pressure of the storage tank 40 is smaller than the pressure of the operation part 20.

On the other hand, as shown in FIG. 8, when the supply line 3 is not branched and is implemented as one hydraulic line, the third switching mechanism 63 is a third switching device for connecting to the supply line 3. It may include a flow path, a third conversion flow path connected to the lubrication line 5, and a third conversion flow path connected to the discharge line 7. A third conversion flow path connected to the supply line 3, a third conversion flow path connected to the lubrication line 5, and a third conversion flow path connected to the discharge line 7 are in fluid communication with each other. Can be connected and placed. Accordingly, when the switching body 64 is located in the third switching position, the third switching mechanism 63 flows from the supply line 3 to the lubrication line 5 and the discharge line 7. The supply line 3, the lubrication line 5, and the discharge line 7 may be connected so that the flow may flow. Therefore, even if the operating line 4 is connected to the supply line 3 between one side and the other side of the supply line 3, the fluid supplied by the hydraulic pump 2 is the storage tank 40 and the Due to the difference in pressure between the operating parts 20, it may not flow to the operating line 4 and may be discharged to the storage tank 40 through the discharge line 7. This is because the pressure of the storage tank 40 is smaller than the pressure of the operation part 20.

As described above, when the conversion body 64 is located in the third switching position, the fluid supplied by the hydraulic pump 2 is supplied to the lubrication component 30 and the storage tank 40, and the operation It is not supplied as part 20.

Referring to FIG. 7, the conversion part 6 may include an elastic member 65. The elastic member 65 may elastically press the conversion body 64 in a direction from one side of the conversion body 64 toward the other side of the conversion body 64. One side of the conversion body 64 and the other side of the conversion body 64 mean opposite sides based on the direction in which the conversion body 64 moves.

Here, the conversion unit 6 may be implemented so that the conversion body 64 moves by a difference in hydraulic pressure. This will be described in detail with reference to FIG. 7.

The switching unit 6 may include a proportional control valve 66. The proportional control valve 66 may be connected to the supply line 3 through a first control channel 661 and connected to one side of the switching body 64 through a second control channel 662. The other side of the conversion body 64 may be connected to the supply line 3 through a third control channel 663. The proportional control valve 66 adjusts the hydraulic pressure formed in the second control flow path 662 by proportionally controlling the operating state of the operating component 20, such as whether the operating component 20 is operating, an amount of operation, etc. do. In this case, one side of the conversion body 64 is applied with a pressure added by the pressure by the elastic member 65 and the hydraulic pressure formed in the second control channel 662, and the other side of the conversion body 64 Pressure by hydraulic pressure formed in the third control flow path 663 is applied. Accordingly, a difference occurs in pressure applied to one side of the conversion body 64 and the other side of the conversion body 64 according to the operating state of the operation part 20, and the conversion body 64 ) Can be moved automatically.

An example of the operation of the proportional control valve 66 will be described in detail as follows.

First, the proportional control valve 66 allows a connection between the first control flow path 661 and the second control flow path 662 through proportional control, thereby forming hydraulic pressure in the second control flow path 662. have. In this case, the hydraulic pressure formed in the third control passage 663 may be the same as the hydraulic pressure formed in the supply line 3. Accordingly, a pressure by the elastic member 65 and a hydraulic pressure formed in the second control channel 662 formed by the proportional control valve 66 are applied to one side of the conversion body 64, and the conversion Hydraulic pressure formed in the third control passage 663 may be applied to the other side of the main body.

Next, when the operating amount of the actuating part 20 is increased and the fluid supplied from the hydraulic pump 2 is to be supplied only to the actuating part 20, the proportional control valve 66 is The hydraulic pressure formed in the second control channel 662 may be increased. Accordingly, the pressure by the elastic member 65 and the hydraulic pressure formed in the second control passage 662 are added, so that the pressure applied to one side of the switching body 64 is applied to the third control passage 663. It may be in a state greater than the pressure applied to the other side of the conversion body 64 by the hydraulic pressure formed. Accordingly, the conversion body 64 may be located at the first conversion position.

Next, when the operating amount of the actuating part 20 decreases and the fluid supplied from the hydraulic pump 2 can be supplied to both the actuating part 20 and the lubricating part 30, the proportional control valve 66 ) May reduce the hydraulic pressure formed in the second control passage 662 through proportional control. Accordingly, the pressure by the elastic member 65 and the hydraulic pressure formed in the second control passage 662 are added, so that the pressure applied to one side of the switching body 64 is applied to the third control passage 663. The pressure applied to the other side of the conversion body 64 by the formed hydraulic pressure may be reduced to a state. Accordingly, the conversion body 64 may be located at the second conversion position.

Next, when the operation of the operation part 20 is in the standby state, the proportional control valve 66 may form the minimum hydraulic pressure in the second control flow path 662 through proportional control. Accordingly, the pressure by the elastic member 65 and the minimum hydraulic pressure formed in the second control flow path 662 are added, so that the pressure applied to one side of the switching body 64 is applied to the third control flow path 663 It can be in a very small state compared to the pressure applied to the other side of the conversion body 64 by the hydraulic pressure formed in. Accordingly, the conversion body 64 may be located at the third conversion position.

Although not shown, the conversion unit 6 may be implemented so that the conversion body 64 moves under the control of the control unit. The control unit may move the conversion body 64 according to the operating state of the operation part 20.

Although not shown, the switching unit 6 itself may be implemented as a proportional control valve.

9 to 12, the hydraulic device 1 of the agricultural work vehicle according to the present invention may include a flow rate selection unit (8).

The flow rate selection unit 8 is installed in the lubrication line 5. In this case, the lubrication line 5 is a first lubrication line 51 connected to the inlet side of the flow rate selection unit 8, and a second lubrication line 52 connected to the outlet side of the flow rate selection unit 8 It may include. The inlet side of the flow rate selection unit 8 may be connected to the conversion unit 6 through the first lubrication line 51. The outlet side of the flow rate selector 8 may be connected to the lubrication component 30 through the second lubrication line 52.

The flow rate selection unit 8 may control the fluid supplied from the conversion unit 6 at different flow rates to be transferred to the lubrication part 30. In this case, according to the flow rate of the lubricating fluid required by the lubricating component 30, the flow rate selection unit 8 may selectively adjust the flow rate of the fluid to be delivered to the lubricating component 30.

The flow rate selection unit 8 may increase the flow rate of the fluid to be delivered to the lubricating part 30. Accordingly, the hydraulic system 1 of the agricultural work vehicle according to the present invention can increase the lubrication and cooling effect of the lubrication component 30 by increasing the flow rate of the fluid supplied to the lubrication component 30.

The flow rate selection unit 8 may reduce the flow rate of the fluid to be delivered to the lubricating part 30. Accordingly, the hydraulic system 1 of the agricultural work vehicle according to the present invention reduces the flow rate of the fluid supplied to the lubricating part 30, thereby reducing the flow rate of the fluid supplied to the lubricating part 30 more than necessary. By reducing the rotational resistance, the power transmission efficiency can be improved. In addition, the hydraulic system 1 of the agricultural work vehicle according to the present invention can reduce unnecessary consumption of power generated by the engine by supplying more fluid than necessary to the lubrication component 30. Accordingly, the hydraulic device 1 of the agricultural work vehicle according to the present invention can improve the efficiency of the power generated by the engine.

The flow rate selection unit 8 may include a plurality of selection lines 81 (shown in FIG. 9) and a selection mechanism 82.

The selection lines 81 control the fluid supplied from the first lubrication line 51 at different flow rates and transfer them to the second lubrication line 52. The selection lines 81 have different flow rates through which the fluid can pass, so that the fluid can be adjusted to different flow rates. For example, the selection lines 81 may have different cross-sectional areas of flow paths through which fluid passes. Each of the selection lines 81 may be implemented with a structure having the same cross-sectional area as a whole, or may be implemented with a structure having a narrow cross-sectional area in some sections.

The selection mechanism 82 connects the first lubrication line 51 to any one of the selection lines 81. The flow rate of the fluid supplied to the second lubrication line 52 may be adjusted according to which of the selection mechanisms 82 connects the first lubrication line 51 to the selection line 81. . The selection mechanism 82 may be disposed between the first lubrication line 51 and the selection lines 81. The inlet side of the selection mechanism 82 may be connected to the first lubrication line 51. The outlet side of the selection mechanism 82 may be connected to the selection lines 81. The selection lines 81 may be integrated into one hydraulic line before being connected to the second lubrication line 52 and then connected to the second lubrication line 52.

10 and 11, when the flow rate selection unit 8 includes a first selection line 811 and a second selection line 812, the selection mechanism 82 is the first lubrication line 51 may be connected to any one of the first selection line 811 and the second selection line 812. The first selection line 811 may be implemented to pass a fluid having a higher flow rate than that of the second selection line 812. For example, when the first selection line 811 controls the fluid supplied from the first lubrication line 51 to a first flow rate, the second selection line 812 is formed from the first lubrication line 51. The supplied fluid may be adjusted to a second flow rate that is less than the first flow rate. The second selection line 812 may be connected to the first selection line 811 at a point before the first selection line 811 is connected to the second lubrication line 52. In order to connect the first lubrication line 51 to any one of the first selection line 811 and the second selection line 812, the selection mechanism 82 includes a first selection member 821, It may include two selection members 822, and a selection body 823.

The first selection member 821 connects the first lubrication line 51 to the first selection line 811. The first selection member 821 may include a first selection flow path for connecting to the first lubrication line 51 and a first selection flow path for connection to the first selection line 811. The first selection flow paths may be arranged to be connected to each other in fluid communication.

The second selection member 822 connects the first lubrication line 51 to the second selection line 812. The second selection member 822 may include a second selection passage connected to the first lubrication line 51 and a second selection passage connected to the second selection line 812. The second selection flow paths may be arranged to be connected to each other in fluid communication.

The selection body 823 is a combination of the first selection member 821 and the second selection member 822. The first selection member 821 and the second selection member 822 may be arranged side by side along a direction in which the selection body 823 moves. The selection body 823 may move between a first selection position and a second selection position.

10, when the selection body 823 is located at the first selection position, the first selection member 821 moves the first lubrication line 51 to the first selection line 811. I can connect. Accordingly, the flow rate selection unit 8 adjusts the fluid supplied from the first lubrication line 51 to the first flow rate using the first selection line 811 and then adjusts the second lubrication line 52 ) Can be supplied.

11, when the selection body 823 is located at the second selection position, the second selection member 822 moves the first lubrication line 51 to the second selection line 812. I can connect. Accordingly, the flow rate selection unit 8 adjusts the fluid supplied from the first lubrication line 51 to the second flow rate using the second selection line 812, and then the second lubrication line 52 ) Can be supplied. Accordingly, when the selection body 823 moves from the first selection position to the second selection position, the flow rate selection unit 8 reduces the flow rate of the fluid supplied to the second lubrication line 52. I can.

In the above, the flow rate selection unit 8 has been described based on an embodiment including two selection lines 81, but is not limited thereto, and the flow rate selection unit 8 includes three or more selection lines 81 It may be implemented to In this case, the selection mechanism 82 may be implemented to include the same number of selection members as the number of the selection lines 81.

Although not shown, an elastic member may be installed on one side of the selection body 823. The elastic member may elastically press the selection body 823 in a direction from one side of the selection body 823 toward the other side of the selection body 823. One side and the other side of the selection body 823 mean opposite sides of each other based on the direction in which the selection body 823 moves. A proportional control valve may be connected to the other side of the selection body 823.

Although not shown, the flow rate selection unit 8 may be implemented such that the selection body 823 moves under the control of the controller. The control unit may move the selection body 823 according to whether the lubrication component 30 is operated. Accordingly, the control unit may adjust the flow rate of the fluid supplied to the lubricating part 30 according to whether the lubricating part 30 is operated.

Although not shown, the selection mechanism 82 itself may be implemented as a proportional control valve.

12 to 15, the hydraulic device 1 of the agricultural work vehicle according to the present invention may include a distribution unit 9.

The distribution unit 9 distributes the fluid supplied from the flow rate selection unit 8 to each of the plurality of lubrication parts 30. Accordingly, the hydraulic device 1 of the agricultural work vehicle according to the present invention can supply the fluid supplied by one hydraulic pump 2 to each of the lubrication parts 30 by using the distribution unit 9. Is implemented. Therefore, the hydraulic system 1 of an agricultural work vehicle according to the present invention can implement a structure more concisely, as well as improve ease of arrangement when compared with the prior art.

The distribution unit 9 may be connected to each of the flow rate selection unit 8 and the lubrication parts 30. The inlet side of the distribution unit 9 may be connected to the flow rate selection unit 8 through the second lubrication line 52. The outlet side of the distribution part 9 may be connected to the lubrication parts 30 through the third lubrication lines 53 of the lubrication line 5.

The distribution unit 9 may include a plurality of distribution mechanisms 91. One side of the distribution mechanisms 91 may be connected to the flow rate selection part 8 through the second lubrication line 52 and the other side may be connected to each of the lubrication parts 30. Each of the distribution mechanisms 91 transmits the flow rate of the fluid supplied from the flow rate selection unit 8 as it is to the lubrication part 30 or decreases the flow rate of the fluid supplied from the flow rate selection unit 8 to provide the lubrication. It can be implemented to deliver to the part 30.

To this end, the distribution mechanisms 91 may each include a distribution line 911, a bypass line 912, and a distribution valve 913.

The distribution line 911 delivers the fluid supplied from the flow rate selection unit 8 to the lubrication component 30. One side of the distribution line 911 is connected to the flow rate selection unit 8 through the second lubrication line 52, and the other side is one of the lubrication parts 30 through the third lubrication line 53. Can be connected to one. For example, the other side of the distribution line 911 may be connected to the first lubrication component 301. The distribution line 911 may be implemented to connect the flow rate of the fluid supplied from the flow rate selection unit 8 to the lubrication component 30 as it is.

The bypass line 912 reduces the flow rate of the fluid supplied from the flow rate selection unit 8 and transmits it to the lubricating part 30. One side of the bypass line 912 may be connected to the distribution line 911 at the inlet side of the distribution valve 913, and the other side may be connected to the distribution line 911 at the outlet side of the distribution line 911. have. The bypass line 912 implements a smaller amount of flow through which the fluid can pass than the distribution line 911, so that the flow rate of the fluid can be reduced and transmitted to the lubricating part 30. The bypass line 912 may be implemented in a structure having the same cross-sectional area as a whole, or may be implemented in a structure with a narrow cross-sectional area in some sections.

The distribution valve 913 selectively opens and closes the distribution line 911. The distribution valve 913 may be installed in the distribution line 911 between one side and the other side of the distribution line 911. As shown in FIG. 14, when the distribution valve 913 opens the distribution line 911, the fluid supplied from the flow rate selection unit 8 through the second lubrication line 52 is transferred to the distribution line ( It may be supplied to the lubrication component 30 through 911 and the third lubrication line 53. In this case, the fluid supplied from the flow rate selection unit 8 may be supplied to the lubricating part 30 without a change in flow rate. As shown in FIG. 13, when the distribution valve 913 closes the distribution line 911, the fluid supplied from the flow rate selection unit 8 through the second lubrication line 52 is transferred to the bypass line ( It may be supplied to the lubrication component 30 through 912 and the third lubrication line 53. In this case, the fluid supplied from the flow rate selection unit 8 may be supplied to the lubricating part 30 by reducing the flow rate by the bypass line 912.

Accordingly, the hydraulic system 1 of the agricultural work vehicle according to the present invention primarily adjusts the flow rate of the fluid using the flow rate selection unit 8, and then uses the distribution mechanism 91 as necessary. It is implemented so that the flow rate of the fluid can be secondarily adjusted. Accordingly, the hydraulic system 1 of the agricultural work vehicle according to the present invention can finely adjust the flow rate of the fluid to be supplied to the lubrication part 30, and thus the consumption of power generated by the engine can be further reduced. Accordingly, the hydraulic device 1 of the agricultural work vehicle according to the present invention can improve the efficiency of the power generated by the engine.

The distribution valve 913 may include a closing member 9131, an opening member 9132, and a distribution body 9133.

The closing member 9131 closes the distribution line 911. The closing member 9131 may include a closing passage for connecting to the distribution line 911 and a check valve closing the closing passage. The check valve may block the fluid from moving from the second lubrication line 52 toward the third lubrication line 53. The check valve may selectively allow the fluid to move from the third lubrication line 53 to the second lubrication line 52 according to the hydraulic pressure of the fluid located at the outlet side of the distribution valve 913. have.

The opening member 9132 opens the distribution line 911. The opening member 9132 may include an open line for connecting to the distribution line 911.

The distribution body 9133 is a combination of the closing member 9131 and the opening member 9132. The closing member 9131 and the opening member 9132 may be arranged side by side along a direction in which the distribution body 9133 moves. The distribution body 9133 can be moved between a closed position and an open position.

As shown in FIG. 13, when the distribution main body 9133 is positioned in the closed position, the closing member 9131 may close the distribution line 911. Accordingly, the distribution mechanism 91 may supply the fluid supplied from the second lubrication line 52 to the third lubrication line 53 after reducing the flow rate by using the bypass line 912.

As shown in FIG. 14, when the distribution body 9133 is located in the open position, the opening member 9132 may open the distribution line 911. Accordingly, the distribution mechanism 91 can supply the fluid supplied from the second lubrication line 52 to the third lubrication line 53 as it is without adjusting the flow rate.

Although not shown, an elastic member may be installed on one side of each of the distribution bodies 9133. The elastic member may elastically press the distribution main body 9133 in a direction from one side of the distribution main body 9133 toward the other side of the distribution main body 9133. One side and the other side of the distribution body 9133 mean opposite sides of each other based on the direction in which the distribution body 9133 moves. A proportional control valve may be connected to the other side of each of the distribution bodies 9133.

Although not shown, the distribution mechanisms 91 may be implemented so that the distribution body 9133 moves according to the control of the controller. The control unit may individually move each of the distribution bodies 9133 depending on whether each of the lubrication parts 30 is operated. Accordingly, the control unit may adjust the flow rate of the fluid supplied to each of the lubricating parts 30 according to whether each of the lubricating parts 30 is operated.

Although not shown, the distribution valve 913 itself may be implemented as a proportional control valve.

Referring to FIGS. 12 and 15, an embodiment in which the distribution unit 9 includes a first distribution device 91a (shown in FIG. 12) and a second distribution device 91b (shown in FIG. 12) will be described. As follows.

The first distribution mechanism 91a includes a first distribution line 911a (shown in FIG. 15), a first bypass line 912a (shown in FIG. 15), and a first distribution valve 913a (shown in FIG. 15). ) Can be included.

One side of the first distribution line 911a is connected to the flow rate selection unit 8 through the second lubrication line 52, and the other side is the first lubrication component ( 301).

One side of the first bypass line 912a is connected to the first distribution line 911a at the inlet side of the first distribution valve 913a, and the other side is at the outlet side of the first distribution valve 913a. It may be connected to the first distribution line 911a.

The first distribution valve 913a may be installed on the first distribution line 911a to open and close the first distribution line 911a. When the first distribution valve 913a closes the first distribution line 911a, the fluid supplied from the flow rate selection unit 8 is reduced through the first bypass line 912a and 1 It can be supplied as a lubricating part 301. When the first distribution valve 913a opens the first distribution line 911a, the fluid supplied from the flow rate selection unit 9 is lubricated without adjusting the flow rate through the first distribution line 911a. It can be supplied as part 301.

The second distribution mechanism 91b includes a second distribution line 911b (shown in FIG. 15), a second bypass line 912b (shown in FIG. 15), and a second distribution valve 913b (shown in FIG. 15). ) Can be included.

One side of the second distribution line 911b is connected to the flow rate selection unit 8 through the second lubrication line 52, and the other side is connected to the second lubrication line 532 through the third lubrication line 532. ) Can be connected. One side of the second distribution line 911b and one side of the first distribution line 911a may be connected to the second lubrication line 52 at the same point.

The second bypass line 912b has one side connected to the second distribution line 911b at the inlet side of the second distribution valve 913b, and the other side at the outlet side of the second distribution valve 913b. It may be connected to the second distribution line 911b. Part of the first bypass line 912a and the second bypass line 912b may be formed in the same flow path. Although not shown, the first bypass line 912a and the second bypass line 912b may each be formed as a separate flow path.

The second distribution valve 913b may be installed on the second distribution line 911b to open and close the second distribution line 911b. When the second distribution valve 913b closes the second distribution line 911b, the fluid supplied from the flow rate selection unit 8 is reduced through the second bypass line 912b and 2 It can be supplied as a lubricating part 302. When the second distribution valve 913b opens the second distribution line 911b, the fluid supplied from the flow rate selection unit 9 is lubricated without adjusting the flow rate through the second distribution line 911b. It may be supplied as part 302.

In the above, the distribution unit 9 has been described based on an embodiment including two distribution mechanisms 91, but is not limited thereto, and the distribution unit 9 is implemented to include three or more distribution mechanisms 91 It could be.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope of the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

1: hydraulic system of agricultural work vehicle 2: hydraulic pump
3: supply line 4: operation line
5: lubrication line 6: switching part
7: discharge line 8: flow selector
9: distribution unit 31: first branch line
32: second branch line 51: first lubrication line
52: second lubrication line 53: third lubrication line
61: first conversion mechanism 62: second conversion mechanism
63: 3rd conversion mechanism 64: conversion body
81: selection line 82: selection mechanism
91: distribution mechanism 911: distribution line
912: bypass line 913: distribution valve

Claims (12)

A hydraulic pump 2 for supplying a fluid;
An operating line (4) for supplying the fluid supplied from the hydraulic pump (2) to an operating component (20) operating using a fluid among vehicle components of an agricultural work vehicle;
A lubrication line (5) for supplying the fluid supplied from the hydraulic pump (2) to a lubrication component (30) that lubricates the vehicle parts using a fluid;
A switch (6) for switching the fluid supplied by the hydraulic pump (2) to be supplied to at least one of the operating line (4) and the lubrication line (5); And
A hydraulic device for an agricultural work vehicle comprising a supply line (3) having one side connected to the hydraulic pump (2) and the other side connected to the switching unit (6). The method of claim 1,
One side of the operation line 4 is directly connected to the supply line 3 and the other side is connected to the operation part 20,
The lubrication line (5) is a hydraulic system of an agricultural work vehicle, characterized in that one side is connected to the switching unit (6) and the other side is connected to the lubrication part (30). The method of claim 2,
A hydraulic device for an agricultural work vehicle, characterized in that one side is connected to the switching unit 6 and the other side includes a discharge line 7 connected to a storage tank 40 for storing fluid. The method of claim 3, wherein the switching unit (6) is
A first switching mechanism (61) for switching the fluid supplied by the hydraulic pump (2) to be supplied only to the operation part (20) through the operation line (4);
The second fluid supplied by the hydraulic pump 2 is supplied to the actuating part 20 through the operation line 4 and supplied to the lubricating part 30 through the lubricating line 5. Switching mechanism 62;
A third converting the fluid supplied by the hydraulic pump 2 to be supplied to the lubrication component 30 through the lubrication line 5 and discharged to the storage tank 40 through the discharge line 7 A switching mechanism 63; And
A first switching position in which the first switching mechanism 61 is connected to the supply line 3, the lubrication line 5, and the discharge line 7, and the second switching mechanism 62 is the supply line (3), the lubrication line (5) and the second switching position connected to the discharge line (7), and the third switching mechanism (63) is the supply line (3), the lubrication line (5), And a switching body (64) moving between the third switching positions connected to the discharge line (7). The method of claim 4,
The supply line (3) is connected to the first branch line (31) to be connected to the lubrication line (5) through the switching unit (6), and the discharge line (7) through the switching unit (6) Hydraulic system of an agricultural work vehicle, characterized in that it comprises a second branch line (32) to be. The method of claim 4,
When the conversion body 64 is located at the first conversion position,
The first switching mechanism 61 blocks the connection between the supply line 3 and the lubrication line 5 and blocks the connection between the supply line 3 and the discharge line 7,
One side of the operation line 4 is supplied between one side of the supply line 3 and the other side of the supply line 3 so that the fluid supplied by the hydraulic pump 2 is supplied only to the operation part 20 Hydraulic system of an agricultural work vehicle, characterized in that connected to the line (3). The method of claim 4,
When the conversion body 64 is located in the second conversion position,
The second switching mechanism 62 connects the supply line 3 and the lubrication line 5 and blocks the connection between the supply line 3 and the discharge line 7,
The lubrication line 5 delivers the fluid supplied through the second switching mechanism 62 to the lubrication part 30,
The operating line (4) conveys the fluid flowing along the supply line (3) to the operating part (20). The method of claim 4,
When the conversion body 64 is located in the third conversion position,
The third switching mechanism 63 connects the supply line 3 and the lubrication line 5 and connects the supply line 3 and the discharge line 7,
The lubrication line 5 delivers the fluid supplied through the third switching mechanism 63 to the lubrication component 30,
The discharge line (7) conveys the fluid supplied through the third switching mechanism (63) to the storage tank (40). The method of claim 4,
The conversion unit 6 includes an elastic member 65 installed on one side of the conversion body 64, and a proportional control valve 66 for moving the conversion body 64,
The proportional control valve 66 is connected to the supply line 3 through a first control channel 661 and is connected to one side of the switching main body 64 through a second control channel 662,
The other side of the switching main body (64) is connected to the supply line (3) through a third control channel (663). The method of claim 1,
It includes a flow rate selection unit 8 installed on the lubrication line 5,
The lubrication line (5) includes a first lubrication line (51) connected to the inlet side of the flow rate selection unit (8), and a second lubrication line (52) connected to the outlet side of the flow rate selection unit (8), ,
The flow rate selection unit 8 includes a plurality of selection lines 81 for controlling the fluid supplied from the first lubrication line 51 at different flow rates and transferring the fluid to the second lubrication line 52, and A hydraulic system for an agricultural work vehicle, comprising: a selection mechanism (82) connecting one lubrication line (51) to one of the selection lines (81). The method of claim 10,
It includes a distribution unit 9 installed on the lubrication line 5,
The lubrication line 5 includes a third lubrication line 53 connected to the outlet side of the distribution unit 9,
The second lubrication line 52 is connected to the outlet side of the flow rate selection unit 8 and the inlet side of the distribution unit 9,
The distribution unit (9) distributes the fluid supplied from the flow rate selection unit (8) to each of a plurality of lubrication parts (30). The method of claim 11,
The distribution unit 9 includes a plurality of distribution mechanisms 91 for distributing the fluid supplied from the flow rate selection unit 8 to each of the plurality of lubrication parts 30,
Each of the distribution mechanisms 91,
A distribution line (911) for transferring the fluid supplied from the flow rate selection unit (8) to the lubrication component (30);
A distribution valve 913 selectively opening and closing the distribution line 911; And
When the distribution valve 913 closes the distribution line 911, a bypass line 912 for reducing the flow rate of the fluid supplied from the flow rate selection unit 8 and transmitting it to the lubrication component 30 is provided. Hydraulic system of an agricultural work vehicle comprising a.

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