Multifunctional lifting hydraulic system and tractor

Abstract

The utility model provides a multifunctional lifting hydraulic system and a tractor, the hydraulic system comprises an oil liquid control module, a hydraulic output module and an oil cylinder control module, the oil liquid control module is connected with the oil cylinder control module through the hydraulic output module, and the hydraulic output module comprises a priority valve and a plurality of hydraulic output links. One path of oil passing through the priority valve flows to the first hydraulic output unit in the multiple hydraulic output units, and the other path of oil passing through the priority valve is connected with the oil cylinder control module through the other hydraulic output units; and at least one hydraulic output joint is provided with a hydraulic lock. According to the multifunctional lifting hydraulic system, a tractor can achieve synchronous composite action, and the multifunctional lifting hydraulic system is suitable for various different operation scenes; the output quantity of the oil liquid can be adjusted according to requirements, so that the functionality of the tractor is improved; and through the arrangement of the hydraulic lock and the hydraulic output joint, the inner leakage amount of the control valve can be reduced, then the static settlement amount at the front suspension position is reduced, and the using performance of the tractor is more reliable.

Description

Technical Field

[0001] This application relates to the field of tractor hydraulic system technology, and in particular to a multi-functional lifting hydraulic system and tractor. Background Technology

[0002] Tractors use hydraulic systems to control different actions. Existing hydraulic systems have several problems: First, they are limited in function and cannot achieve synchronized compound actions, reducing the tractor's overall functionality; second, while existing multi-way valves achieve sealing through the cooperation of the valve core and valve body, this design still suffers from internal oil leakage in actual use, and the leakage volume is relatively large; third, the output flow rate of existing multi-way valves cannot be adjusted according to operational requirements.

[0003] Therefore, a multifunctional lifting hydraulic system needs to be designed to solve the above problems. Utility Model Content

[0004] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a multi-functional lifting hydraulic system and tractor, which effectively solves the problems of the existing hydraulic system having single function, large oil leakage, and inability to be adjusted according to operational needs.

[0005] According to a first aspect of this utility model, a multifunctional lifting hydraulic system is provided, wherein the multifunctional lifting hydraulic system includes an oil control module, a hydraulic output module, and a cylinder control module. The oil control module is connected to the cylinder control module through the hydraulic output module. The hydraulic output module includes a priority valve and multiple hydraulic output links. One path of oil flows through the priority valve to the first hydraulic output link among the multiple hydraulic output links. Another path of oil flows through the priority valve and is connected to the cylinder control module through the remaining hydraulic output links. At least one of the hydraulic output links is provided with a hydraulic lock.

[0006] Preferably, the plurality of hydraulic output links include a first hydraulic output link, a second hydraulic output link, and a third hydraulic output link. One path of hydraulic fluid flows through the priority valve to the first hydraulic output link, and another path of hydraulic fluid flows through the priority valve to the cylinder control module via the second hydraulic output link and the third hydraulic output link. The third hydraulic output link is equipped with a hydraulic lock.

[0007] Preferably, the priority valve is provided with an adjusting handwheel.

[0008] Preferably, the hydraulic cylinder control module includes a lifting control valve group and a hydraulic cylinder body, and the hydraulic cylinder body is connected to the hydraulic control module through the lifting control valve group.

[0009] Preferably, the lifting control valve assembly is capable of switching between a neutral state, an ascending state, and a descending state, and the lifting control valve assembly includes a main control valve, an unloading valve, and a descending valve.

[0010] Preferably, the lifting control valve assembly includes a first connection port connected to the hydraulic output module and a first return port connected to the oil control module; when the lifting control valve assembly is in a neutral state, the main control valve is in the neutral position, and the oil returns through the first connection port and the unloading valve through the first return port.

[0011] Preferably, when the lifting control valve assembly is in the rising state, the main control valve is in the left position, a portion of the oil enters the spring chamber of the unloading valve through the first connection port, the unloading valve is closed, and another portion of the oil enters the cylinder body through the first connection port and the left position of the main control valve.

[0012] Preferably, the lifting control valve group further includes a second oil return port connected to the oil control module, and the lowering valve is connected to the second oil return port; when the lifting control valve group is in the lowering state, the main control valve is in the right position, the lowering valve is in the right position, the oil returns through the first connection port and the unloading valve through the first oil return port, and the oil in the cylinder body flows to the second oil return port through the right position of the lowering valve.

[0013] Preferably, the cylinder control module further includes a speed regulating valve, and the lifting control valve group is connected to the cylinder body through the speed regulating valve; the speed regulating valve is provided with a one-way speed regulation structure.

[0014] According to a second aspect of the present invention, a tractor is provided, wherein the tractor includes the multi-functional lifting hydraulic system as described above.

[0015] According to this utility model, the multi-functional lifting hydraulic system enables the tractor to achieve synchronous compound actions through the cooperation of the oil control module, hydraulic output module, and cylinder control module, and is suitable for various different operating scenarios. The hydraulic output module, including a priority valve and multiple hydraulic output links, allows the tractor to perform synchronous compound actions while the oil output can be adjusted according to demand, improving the tractor's functionality. The hydraulic lock and hydraulic output links reduce leakage in the control valve's neutral position, thereby reducing static settlement at the front suspension and making the tractor's performance more reliable.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A first structural schematic diagram of a multifunctional lifting hydraulic system according to an embodiment of the present invention is shown;

[0019] Figure 2 A second structural schematic diagram of a multifunctional lifting hydraulic system according to an embodiment of the present invention is shown.

[0020] Reference numerals: 1-Hydraulic control module; 101-Oil tank; 102-Hydraulic pump; 103-Suction filter; 104-Return filter; 2-Hydraulic output module; 201-First hydraulic output connection; 202-Second hydraulic output connection; 203-Third hydraulic output connection; 204-Priority valve; 3-Cylinder control module; 4-Lifting control valve group; 401-Main control valve; 402-Unloading valve; 403-Lowering valve; 5-Speed ​​regulating valve; 6-Cylinder body; P1-First connection port; T1-First return port; T2-Second return port; A1-First output connection port; B1-Second output connection port; A2-Third output connection port; B2-Fourth output connection port; A3-Fifth output connection port; B3-Sixth output connection port. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] According to a first aspect of this utility model, a multifunctional lifting hydraulic system is provided, such as... Figure 1 and Figure 2 As shown, this multi-functional lifting hydraulic system is used in tractors. The multi-functional lifting hydraulic system includes an oil control module 1, a hydraulic output module 2, and a cylinder control module 3.

[0026] In the following description, reference will be made to Figure 1 and Figure 2 This section describes the detailed structure of the hydraulic control module 1, hydraulic output module 2, and cylinder control module 3 of the multi-functional lifting hydraulic system.

[0027] like Figure 1 and Figure 2As shown, in this embodiment, the hydraulic control module 1 can be used to drive hydraulic oil and realize the outflow and return of hydraulic oil. The hydraulic control module 1 may include an oil tank 101, a hydraulic pump 102, a suction filter 103, and a return filter 104. The hydraulic pump 102 drives hydraulic oil from the oil tank 101, so that the hydraulic oil flows to the hydraulic output module 2 and the cylinder control module 3. The suction filter 103 can filter the hydraulic oil to ensure the cleanliness of the system oil. Similarly, the return filter 104 also ensures the cleanliness of the system oil during return.

[0028] The hydraulic control module 1 is connected to the cylinder control module 3 via the hydraulic output module 2. The hydraulic output module 2 includes a priority valve 204 and multiple hydraulic output links. One path of hydraulic fluid flows through the priority valve 204 to the first hydraulic output link, while another path of hydraulic fluid through the priority valve 204 connects to the cylinder control module 3 via the remaining hydraulic output links. This allows the cylinder control module 3 to simultaneously perform lifting or lowering actions while the first hydraulic output link is operating. The priority valve 204 ensures a stable output flow for the first hydraulic output link through one path, while the remaining flow is supplied to the cylinder control module 3 via the priority valve 204. Through the cooperation of the priority valve 204 and multiple hydraulic output links, this hydraulic system can assist the tractor in completing synchronous compound actions. The output of the multi-way valve can be adjusted according to requirements to achieve excellent hydraulic fluid distribution, assisting the tractor in better performing actions and improving the tractor's functionality. Furthermore, since this hydraulic system includes multiple hydraulic output links and the cylinder control module 3, an appropriate output mode can be selected according to working needs, making it suitable for various working conditions.

[0029] Furthermore, at least one of the multiple hydraulic output connectors is equipped with a hydraulic lock. The hydraulic output connector connected to the tractor's front suspension is equipped with a hydraulic lock. Since the front suspension experiences static settlement, installing a hydraulic lock on the hydraulic output connector connected to the front suspension can effectively reduce internal oil leakage, thereby reducing static settlement.

[0030] This multi-functional lifting hydraulic system, through the cooperation of the hydraulic control module 1, hydraulic output module 2, and cylinder control module 3, enables the tractor to achieve synchronous compound actions and is suitable for various different operating scenarios. The hydraulic output module 2, including a priority valve 204 and multiple hydraulic output links, allows the tractor to perform synchronous compound actions while the hydraulic output can be adjusted according to demand, enhancing the tractor's functionality. The hydraulic lock and hydraulic output links reduce leakage in the control valve's neutral position, thereby reducing static settlement at the front suspension and making the tractor's performance more reliable.

[0031] Preferably, such as Figure 1 and Figure 2As shown, in this embodiment, the multiple hydraulic output connections may include a first hydraulic output connection 201, a second hydraulic output connection 202, and a third hydraulic output connection 203. One path of hydraulic fluid flows through the priority valve 204 to the first hydraulic output connection 201, and the other path of hydraulic fluid, also through the priority valve 204, connects to the cylinder control module 3 via the second hydraulic output connection 202 and the third hydraulic output connection 203. The third hydraulic output connection 203 is equipped with a hydraulic lock. The first hydraulic output connection 201 can be connected to implements such as a seeder via the first output connection port A1 and the second output connection port B1. Furthermore, the first hydraulic output connection 201 can cooperate with the priority valve 204 to achieve synchronous operation between the first hydraulic output connection 201 and the cylinder body 6 described below; that is, when the seeder is working, the cylinder body 6 can simultaneously perform lifting and lowering actions. The third hydraulic output connection 203 is connected to the front suspension via the fifth output connection port A3 and the sixth output connection port B3. Since the front suspension experiences static settling, a hydraulic lock is installed on the third hydraulic output connection 203. The second hydraulic output connector 202 connects to the remaining tools via the third output connector port A2 and the fourth output connector port B2. (See also...) Figure 2 The hydraulic output module 2 can realize the synchronous action of the first hydraulic output link 201 and the cylinder body 6, or the synchronous action of the first hydraulic output link 201 and the second hydraulic output link 202, or the synchronous action of the first hydraulic output link 201 and the third hydraulic output link 203. The operator can make a specific selection according to actual needs.

[0032] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the priority valve 204 is equipped with an adjusting handwheel. The flow rate supplied by the priority valve 204 to the hydraulic output link can be adjusted by the adjusting handwheel. Specifically, the adjusting handwheel is located near the priority valve 204, and the operator can adjust the adjusting handwheel according to the working scenario before operating the tractor to ensure an appropriate oil output.

[0033] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the hydraulic cylinder control module 3 may include a lifting control valve group 4 and a hydraulic cylinder body 6, and the hydraulic cylinder body 6 is connected to the hydraulic control module 1 through the lifting control valve group 4.

[0034] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the lifting control valve group 4 can switch between a neutral state, an ascending state, and a descending state. The lifting control valve group 4 includes a main control valve 401, an unloading valve 402, and a descending valve 403.

[0035] Preferably, such as Figure 1 and Figure 2As shown, in this embodiment, the lifting control valve assembly 4 includes a first connection port P1 connected to the hydraulic output module 2 and a first return port T1 connected to the hydraulic control module 1. When the lifting control valve assembly 4 is in a neutral state, the main control valve 401 is in the neutral position, and the hydraulic fluid returns through the first connection port P1 and the unloading valve 402 through the first return port T1.

[0036] Preferably, such as Figure 1 and Figure 2 As shown in the embodiment, when the lifting control valve group 4 is in the rising state, the main control valve 401 is in the left position. A portion of the oil enters the spring chamber of the unloading valve through the first connection port P1, and the unloading valve 402 is closed. Another portion of the oil enters the cylinder body 6 through the first connection port P1 and the left position of the main control valve 401.

[0037] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the lifting control valve group 4 may further include a second oil return port T2 connected to the oil control module 1, and the lowering valve 403 is connected to the second oil return port T2. When the lifting control valve group 4 is in the lowering state, the main control valve 401 is in the right position, the lowering valve 403 is in the right position, the oil returns through the first connection port P1 and the unloading valve 402 through the first oil return port T1, and the oil in the cylinder body 6 flows to the second oil return port T2 through the right position of the lowering valve 403.

[0038] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, the cylinder control module 3 may further include a speed regulating valve 5. The lifting control valve group 4 is connected to the cylinder body 6 via the speed regulating valve 5. The speed regulating valve 5 is equipped with a one-way speed regulation structure. The one-way speed regulation structure can be, for example, a one-way valve in conjunction with a regulating switch. By regulating the switch, the opening of the speed regulating valve 5 can be adjusted, thereby adjusting the flow rate of the hydraulic fluid, thus achieving the regulation of the descent speed. The one-way valve ensures that the hydraulic fluid can only flow from right to left and cannot flow from left to right, so the lifting speed is not affected. Regardless of the descent speed adjustment, the cylinder can always be lifted at the maximum speed, improving work efficiency.

[0039] The overall operation of this multi-functional lifting hydraulic system is as follows: the hydraulic pump 102 draws oil from the oil tank 101 through the oil suction filter 103 and delivers the hydraulic oil to the hydraulic output module 2 and the cylinder control module 3. The hydraulic output module 2 and the cylinder control module 3 can control the on / off state and flow rate of the hydraulic output.

[0040] Specifically, the operation process of the cylinder control module 3 is as follows: the lifting control valve group 4 can control the neutral, rising and falling of the machine. The hydraulic oil output by the hydraulic pump 102 reaches the first connection port P1 through the hydraulic output module 2. When the main control valve 401 is in the neutral position, the spring chamber of the unloading valve 402 returns oil through the first return port T1. The hydraulic oil in the first connection port P1 is unloaded under low pressure through the unloading valve 402, reducing the power loss of the system. When the main control valve 401 switches to the left position, the spring chamber of the unloading valve 402 is connected to the hydraulic oil in the first connection port P1, and the unloading valve 402 is closed. The hydraulic oil from the first connection port P1 passes through the main control valve 401 and the speed regulating valve 5 to reach the cylinder body 6 for lifting. When the main control valve 401 switches to the right position, the lowering valve 403 also switches to the right position simultaneously. The spring chamber of the unloading valve 402 returns oil through the first return port T1. The hydraulic oil from the first connection port P1 is unloaded under low pressure through the unloading valve 402. At the same time, the hydraulic oil at the cylinder body 6 returns to the oil tank 101 through the speed regulating valve 5 and the lowering valve 403 via the second return port T2, thus realizing the lowering action of the machine.

[0041] The operation of hydraulic output module 2 is as follows: The first hydraulic output connector 201 can be connected to implements such as seeders through the first output connector connection port A1 and the second output connector connection port B1. In cooperation with the priority valve 204, the first hydraulic output connector 201 and the lifting control valve group 4 can operate synchronously. That is, while the first hydraulic output connector 201 is working, the lifting control valve group 4 can simultaneously lift or lower. The priority valve 204 ensures that the first hydraulic output connector 201 has a stable output flow. Excess flow from the hydraulic pump 102 can be supplied to subsequent functional valves such as the lifting control valve group 4 through the priority valve 204. The third hydraulic output connector 203 integrates a hydraulic lock. When connected to the front suspension through the fifth output connector connection port A3 and the sixth output connector connection port B3, the hydraulic lock can reduce the leakage of the third hydraulic output connector 203, meeting the low leakage requirements of the front suspension.

[0042] This multi-functional lifting hydraulic system, through the cooperation of the hydraulic control module, hydraulic output module, and cylinder control module, enables the tractor to achieve synchronous compound actions and is suitable for various different operating scenarios. The hydraulic output module, including a priority valve and multiple hydraulic output links, allows the tractor to perform synchronous compound actions while the hydraulic output can be adjusted according to demand, enhancing the tractor's functionality. The hydraulic lock and hydraulic output links reduce leakage within the control valve, thereby reducing static settlement at the front suspension and making the tractor's performance more reliable.

[0043] Furthermore, according to a second aspect of the present invention, a tractor is provided, the tractor including the multi-functional lifting hydraulic system as described above.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A multifunctional lifting hydraulic system, characterized in that, The multi-functional lifting hydraulic system includes an oil control module, a hydraulic output module, and a cylinder control module. The oil control module is connected to the cylinder control module through the hydraulic output module. The hydraulic output module includes a priority valve and multiple hydraulic output links. One path of oil flows through the priority valve to the first hydraulic output link among the multiple hydraulic output links. Another path of oil flows through the priority valve to the cylinder control module through the remaining hydraulic output links. At least one hydraulic output link is equipped with a hydraulic lock.

2. The multifunctional lifting hydraulic system according to claim 1, characterized in that, Multiple hydraulic output connections include a first hydraulic output connection, a second hydraulic output connection, and a third hydraulic output connection. One path of hydraulic fluid flows through the priority valve to the first hydraulic output connection, and another path of hydraulic fluid flows through the priority valve to the cylinder control module via the second hydraulic output connection and the third hydraulic output connection. The third hydraulic output connection is equipped with a hydraulic lock.

3. The multifunctional lifting hydraulic system according to claim 1, characterized in that, The priority valve is equipped with an adjusting handwheel.

4. The multifunctional lifting hydraulic system according to claim 1, characterized in that, The hydraulic cylinder control module includes a lifting control valve group and a hydraulic cylinder body, and the hydraulic cylinder body is connected to the hydraulic control module through the lifting control valve group.

5. The multifunctional lifting hydraulic system according to claim 4, characterized in that, The lifting control valve assembly can switch between a neutral state, an ascending state, and a descending state. The lifting control valve assembly includes a main control valve, an unloading valve, and a descending valve.

6. The multifunctional lifting hydraulic system according to claim 5, characterized in that, The lifting control valve assembly includes a first connection port connected to the hydraulic output module and a first return port connected to the oil control module; When the lifting control valve group is in the neutral state, the main control valve is in the neutral position, and the oil returns through the first connection port and the unloading valve through the first return port.

7. The multifunctional lifting hydraulic system according to claim 6, characterized in that, When the lifting control valve assembly is in the rising state, the main control valve is in the left position. A portion of the oil enters the spring chamber of the unloading valve through the first connection port, and the unloading valve is closed. Another portion of the oil enters the cylinder body through the first connection port and the left position of the main control valve.

8. The multifunctional lifting hydraulic system according to claim 6, characterized in that, The lifting control valve group also includes a second oil return port connected to the oil control module, and the lowering valve is connected to the second oil return port; When the lifting control valve group is in the lowering state, the main control valve is in the right position, the lowering valve is in the right position, the oil returns through the first connection port and the unloading valve through the first return port, and the oil in the cylinder body flows to the second return port through the right position of the lowering valve.

9. The multifunctional lifting hydraulic system according to claim 4, characterized in that, The cylinder control module also includes a speed regulating valve, and the lifting control valve group is connected to the cylinder body through the speed regulating valve; The speed regulating valve is equipped with a one-way speed regulation structure.

10. A tractor, characterized in that, The tractor includes the multi-functional lifting hydraulic system as described in any one of claims 1 to 9.

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