Power gear shifting clutch and lubrication hydraulic system

Abstract

The utility model provides a power gear shifting clutch and lubrication hydraulic system which comprises a power pump, a lubrication pump, a pressure regulating valve and a lubrication pipeline, an outlet of the power pump is provided with a clutch oil pipeline, and the clutch oil pipeline is connected with an inlet of the pressure regulating valve through a branch; an outlet of the lubricating pump is connected with a lubricating adjusting valve, a first outlet of the lubricating adjusting valve and an outlet of the pressure adjusting valve are both connected with one end of the lubricating pipeline, and a lubricating branch is arranged at the other end of the lubricating pipeline. And a second outlet of the lubrication regulating valve is provided with a pressure relief pipeline. According to the utility model, the power pump and the lubricating pump are respectively used for supplying pressure oil, so that continuous high-pressure large-flow output is avoided, and the hydraulic energy consumption is reduced; the redundant pressure of the clutch oil pipeline is unloaded to the lubricating pipeline through the pressure regulating valve, the pressure of the lubricating pipeline is regulated through the lubricating regulating valve, the service life of the gear shifting clutch and parts of a lubricating system is prolonged, and energy waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor power shift clutch hydraulic systems, in particular to a power shift clutch and lubrication hydraulic system. Background Art

[0002] In power-shift tractors, the hydraulic oil and lubricating oil for the shift clutch are both supplied by the same hydraulic pump. Specifically, the hydraulic pump's outlet is equipped with a clutch control shunt and a lubrication shunt. The clutch control shunt provides driving hydraulic oil for the shift clutch, while the lubrication shunt provides lubricating oil to the lubrication system of the shift clutch and other moving parts. Because the shift clutch typically requires a high pressure exceeding 20 bar, and the lubrication system requires a continuous, high flow rate, the hydraulic pump operates at a constant pressure exceeding 20 bar and a high flow rate. This results in high energy consumption, uncontrollable flow and pressure in the lubrication system, and shortens the life of the clutch oil seal. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to reduce the hydraulic energy consumption of the shift clutch and how to control the flow and pressure of the lubrication system.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] The utility model provides a power shift clutch and lubrication hydraulic system, comprising a power pump, a lubrication pump, a pressure regulating valve, and a lubrication pipeline. The outlet of the power pump is provided with a clutch oil pipeline, and the clutch oil pipeline is connected to the inlet of the pressure regulating valve through a branch. The outlet of the lubrication pump is connected to the lubrication regulating valve, and the first outlet of the lubrication regulating valve and the outlet of the pressure regulating valve are both connected to one end of the lubrication pipeline, and the other end of the lubrication pipeline is provided with a lubrication branch. The second outlet of the lubrication regulating valve is provided with a pressure relief pipeline.

[0006] The beneficial effects of the utility model are:

[0007] By adopting the utility model, the power pump is used to supply high-pressure and low-flow pressure oil to drive the shift clutch, and the lubrication pump supplies oil to the lubrication system, thereby avoiding continuous high-pressure and high-flow output and reducing hydraulic energy consumption; the excess pressure of the clutch oil pipeline is unloaded to the lubrication pipeline through the pressure regulating valve, and the pressure of the lubrication pipeline is regulated by the lubrication regulating valve, so that the pressure of the shift clutch and the lubrication system can be controlled, thereby extending the service life of the shift clutch and the lubrication system components and reducing energy waste.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a radiator is provided in the middle of the lubrication pipeline.

[0010] It is convenient to dissipate the heat of lubricating oil and extend the service life of lubrication system parts.

[0011] Furthermore, the radiator is also connected in parallel with a first one-way valve.

[0012] When the pressure difference between the two ends of the radiator increases, the oil can flow out from the first one-way valve, avoiding overpressure in the radiator.

[0013] Furthermore, the other end of the lubrication pipeline is provided with an unloading branch, the unloading branch is connected to the pressure relief pipeline, and a second one-way valve is provided on the unloading branch.

[0014] When the pressure of the lubrication pipeline is high, the second one-way valve can allow excess oil to flow from the lubrication pipeline to the pressure relief pipeline in one direction, avoiding overpressure in the lubrication system and having good sensitivity.

[0015] Furthermore, one end of the valve core of the pressure regulating valve is connected to its own inlet, and the other end is connected to the pressure relief pipeline; the pressure regulating valve is a normally closed valve, and the pressure difference direction at both ends of the valve core of the pressure regulating valve is opposite to the direction of its own reset elastic force.

[0016] The pressure of the clutch oil pipeline determines the pressure difference at both ends of the valve core of the pressure regulating valve. When the pressure of the clutch oil pipeline is too high, the pressure difference at both ends of the valve core of the pressure regulating valve automatically drives the valve core to move, thereby increasing the opening of the pressure regulating valve, improving sensitivity, and increasing the pressure regulation speed.

[0017] Furthermore, a pressure measuring tube is provided at one end of the lubrication pipeline close to the lubrication branch; and a pressure measuring one-way valve is provided on the pressure measuring tube.

[0018] The pressure measuring tube can be used to connect the lubrication pressure sensor to monitor the lubricating oil pressure. When the pressure is too high, the lubrication regulating valve can be operated to unload in time, which has good controllability.

[0019] Furthermore, a filter is provided at one end of the clutch oil pipeline close to the power pump.

[0020] It is convenient to filter the pressure oil output from the power pump to the clutch oil pipeline, thereby improving the cleanliness of the pressure oil.

[0021] Furthermore, the filter is also connected in parallel with a third one-way valve.

[0022] When the filter resistance increases to exceed the opening pressure of the third one-way valve, the third one-way valve opens, allowing the oil to be output to the clutch oil pipeline through the third one-way valve, thereby ensuring the oil pressure of the clutch oil pipeline and preventing the filter from failing due to overpressure, with good reliability.

[0023] Furthermore, the filter is also connected in parallel with a flood alarm, and the alarm pressure of the flood alarm is lower than the opening pressure of the third one-way valve.

[0024] When impurities accumulate in the filter and the resistance increases, the flood control alarm will sound an alarm first, prompting the user to replace the filter element in time; if the user fails to replace the filter element in time, the filter resistance will continue to increase and the third one-way valve will open; it has good reliability.

[0025] Furthermore, it also includes a clutch control solenoid valve group and a return oil pipeline, wherein the end of the clutch oil pipeline away from the power pump is connected to the pressure oil port of the clutch control solenoid valve group, and the return oil pipeline is connected to the return oil port of the clutch control solenoid valve group.

[0026] It is convenient to drive multiple shift clutches at the same time, with compact structure, easy operation and good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the present utility model.

[0028] Figure 2 This is a structural diagram of the utility model in the installed state.

[0029] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0030] 1-Power pump; 2-Lubrication pump; 3-Pressure regulating valve; 4-Lubrication regulating valve; 5-Clutch oil pipeline; 6-Lubrication pipeline; 7-Lubrication branch; 8-Pressure relief pipeline; 9-Radiator; 10-First check valve; 11-Second check valve; 12-Pressure measuring tube; 13-Filter; 14-Third check valve; 15-Flood prevention alarm; 16-Clutch control solenoid valve group; 17-Return oil pipeline. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] This utility model refers to Figure 1-2 .

[0033] The utility model provides a power shift clutch and lubrication hydraulic system, comprising a power pump 1, a lubrication pump 2, a pressure regulating valve 3, and a lubrication pipeline 6. The outlet of the power pump 1 is provided with a clutch oil pipeline 5, and the clutch oil pipeline 5 is connected to the inlet of the pressure regulating valve 3 through a branch; the outlet of the lubrication pump 2 is connected to the lubrication regulating valve 4, the first outlet of the lubrication regulating valve 4 and the outlet of the pressure regulating valve 3 are both connected to one end of the lubrication pipeline 6, and the other end of the lubrication pipeline 6 is provided with a lubrication branch 7; the second outlet of the lubrication regulating valve 4 is provided with a pressure relief pipeline 8.

[0034] principle:

[0035] When installing, if Figure 2 As shown, clutch oil line 5 connects to the clutch control solenoid valve, which connects to the shift clutch and controls its engagement and disengagement. Both the clutch control solenoid valve and the shift clutch are known technologies. Lubrication branch line 7 connects to the lubrication system for the shift clutch and other moving parts. Power pump 1 can be a high-pressure, low-flow pump, while lubrication pump 2 can be a low-pressure, high-flow pump.

[0036] During operation, power pump 1 operates at high pressure and low flow, outputting pressurized oil from power pump 1 to clutch oil line 5. This maintains the required oil pressure in clutch oil line 5 to actuate the shift clutch, ensuring the clutch control solenoid valve is ready to actuate the shift clutch at all times. If the pressure in clutch oil line 5 is too high, the opening of pressure regulating valve 3 is controlled based on the actual rated pressure of the shift clutch, allowing some oil to flow from pressure regulating valve 3 to lubrication line 6. This maintains controllable pressure in clutch oil line 5 and prevents overpressure in the shift clutch. Oil from lubrication pump 2 enters lubrication line 6 through the first outlet of lubrication regulating valve 4, where it merges with the oil from pressure regulating valve 3. The oil in lubrication line 6 is then output to the lubrication system via lubrication branch line 7. The lubrication line 6 is in a low-pressure, high-flow state. When the lubrication system pressure is too high, it means that the flow of the lubrication line 6 is too large. At this time, the lubrication regulating valve 4 can be switched to the state where the first outlet and the second outlet discharge oil at the same time. Part of the oil flows from the second outlet of the lubrication regulating valve 4 to the pressure relief line 8, which is convenient for timely adjustment of the lubrication system pressure, avoids overpressure of the lubrication system, and has sufficient time to adjust the output power of the lubrication pump 2.

[0037] Preferably, the pressure regulating valve 3 and the lubrication regulating valve 4 are both solenoid valves.

[0038] By adopting the utility model, the power pump 1 supplies high-pressure, low-flow pressure oil for driving the shift clutch, and the lubrication pump 2 supplies oil to the lubrication system, thereby avoiding continuous high-pressure, high-flow output and reducing hydraulic energy consumption; the excess pressure of the clutch oil pipeline 5 is unloaded to the lubrication pipeline 6 through the pressure regulating valve 3, and the pressure of the lubrication pipeline 6 is adjusted by the lubrication regulating valve 4, so that the pressure of the shift clutch and the lubrication system can be controlled, thereby extending the service life of the shift clutch and the lubrication system components and reducing energy waste.

[0039] Furthermore, a radiator 9 is provided in the middle of the lubrication pipeline 6 .

[0040] It is convenient to dissipate the heat of lubricating oil and extend the service life of lubrication system parts.

[0041] Furthermore, the radiator 9 is also connected in parallel with a first one-way valve 10 .

[0042] When the pressure difference between the two ends of the radiator 9 increases, the oil can flow out from the first one-way valve 10, thereby preventing the radiator 9 from being over-pressurized.

[0043] Furthermore, the other end of the lubrication pipeline 6 is provided with an unloading branch, which is connected to the pressure relief pipeline 8 and is provided with a second one-way valve 11 .

[0044] When the pressure of the lubrication pipeline 6 is relatively high, the second one-way valve 11 can allow excess oil to flow from the lubrication pipeline 6 to the pressure relief pipeline 8 in one direction, thereby avoiding overpressure in the lubrication system and having good sensitivity.

[0045] Furthermore, one end of the valve core of the pressure regulating valve 3 is connected to its own inlet, and the other end is connected to the pressure relief line 8; the pressure regulating valve 3 is a normally closed valve, and the pressure difference direction at both ends of the valve core of the pressure regulating valve 3 is opposite to the direction of its own reset elastic force.

[0046] The pressure of the clutch oil pipeline 5 determines the pressure difference at both ends of the valve core of the pressure regulating valve 3. When the pressure of the clutch oil pipeline 5 is too high, the pressure difference at both ends of the valve core of the pressure regulating valve 3 automatically drives the valve core to move, thereby increasing the opening of the pressure regulating valve 3, improving sensitivity, and increasing the pressure regulation speed.

[0047] Furthermore, a pressure measuring tube 12 is provided at one end of the lubricating pipeline 6 close to the lubricating branch 7; and a pressure measuring one-way valve is provided on the pressure measuring tube 12.

[0048] The pressure measuring tube 12 can be used to connect the lubrication pressure sensor to monitor the lubrication oil pressure. When the pressure is too high, the lubrication regulating valve 4 can be operated in time to unload, which has good controllability.

[0049] Furthermore, a filter 13 is provided at one end of the clutch oil pipeline 5 close to the power pump 1 .

[0050] It is convenient to filter the pressure oil output from the power pump 1 to the clutch oil pipeline 5, thereby improving the cleanliness of the pressure oil.

[0051] Furthermore, the filter 13 is also connected in parallel with a third one-way valve 14 .

[0052] When the resistance of the filter 13 increases to exceed the opening pressure of the third one-way valve 14, the third one-way valve 14 opens, allowing the oil to be output to the clutch oil pipeline 5 through the third one-way valve 14, thereby ensuring the oil pressure of the clutch oil pipeline 5 and preventing the filter 13 from failing due to overpressure, thereby improving reliability.

[0053] Furthermore, the filter 13 is connected in parallel with a flood alarm 15 , and the alarm pressure of the flood alarm 15 is lower than the opening pressure of the third one-way valve 14 .

[0054] When impurities accumulate in the filter 13 and the resistance increases, the flood prevention alarm 15 will sound an alarm first, prompting the user to replace the filter element of the filter 13 in time; if the user does not replace the filter element of the filter 13 in time, the resistance of the filter 13 will continue to increase, and the third one-way valve 14 will open; it has good reliability.

[0055] Further, such as Figure 2 As shown: it also includes a clutch control solenoid valve group 16 and a return oil pipeline 17. The end of the clutch oil pipeline 5 away from the power pump 1 is connected to the pressure oil port of the clutch control solenoid valve group 16, and the return oil pipeline 17 is connected to the return oil port of the clutch control solenoid valve group 16.

[0056] Note: The clutch control solenoid valve group 16 includes multiple clutch control solenoid valves. The pressure oil port of each clutch control solenoid valve is connected to the clutch oil pipeline 5, and the return oil port of the clutch control solenoid valve is connected to the return oil pipeline 17; the working interface of each clutch control solenoid valve can be used to connect different shift clutches.

[0057] It is convenient to drive multiple shift clutches at the same time, with compact structure, easy operation and good reliability.

[0058] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In addition, if there are order description terms, such as "first", "second", etc., their use in this specification is to facilitate understanding or simplify the description. For example, in order to distinguish multiple technical features with the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of such features. In the description of this utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, if terms describing the relative functional relationship of structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be fixed connections, detachable connections, or integrated; can be mechanical connections or electrical connections; can be direct connections or indirect connections through an intermediate medium, can be internal connections between two elements or interactive relationships between two elements; "fix" can be fixed to form an integral body, or can be detachably fixed through fasteners; can be directly fixed or fixed through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the preceding and following texts, etc.

[0061] In this utility model, if descriptive terms with ancillary or connecting meaning appear, for example, a first feature being "on" or "below" a second feature, these should not be interpreted as limiting unless otherwise expressly specified or limited. For example, "on" or "below" may refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediary. Those skilled in the art will understand the specific meanings of these descriptive terms in this utility model based on the specific circumstances, context, and coherence of the preceding and following texts.

[0062] Furthermore, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of different embodiments and examples described in this specification, unless there is any contradiction, and these combinations or combinations should all fall within the scope summarized by the present invention.

[0064] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in the field within the scope of information available from public channels and in combination with the technical inspiration given by the application documents are still within the scope of protection of the present application.

Claims

1. A power shift clutch and lubrication hydraulic system, characterized by: The invention comprises a power pump (1), a lubrication pump (2), a pressure regulating valve (3), and a lubrication pipeline (6); the outlet of the power pump (1) is provided with a clutch oil pipeline (5), and the clutch oil pipeline (5) is connected to the inlet of the pressure regulating valve (3) through a branch; the outlet of the lubrication pump (2) is connected to the lubrication regulating valve (4), the first outlet of the lubrication regulating valve (4) and the outlet of the pressure regulating valve (3) are both connected to one end of the lubrication pipeline (6), and the other end of the lubrication pipeline (6) is provided with a lubrication branch (7); the second outlet of the lubrication regulating valve (4) is provided with a pressure relief pipeline (8).

2. The power shift clutch and lubrication hydraulic system according to claim 1, characterized in that: A radiator (9) is also provided in the middle of the lubrication pipeline (6).

3. The power shift clutch and lubrication hydraulic system according to claim 2, characterized in that: The radiator (9) is also connected in parallel with a first one-way valve (10).

4. The power shift clutch and lubrication hydraulic system according to claim 1, characterized in that: The other end of the lubrication pipeline (6) is also provided with an unloading branch, which is connected to the pressure relief pipeline (8) and is provided with a second one-way valve (11).

5. The power shift clutch and lubrication hydraulic system according to claim 4, characterized in that: The lubricating pipeline (6) is also provided with a pressure measuring tube (12) at one end close to the lubricating branch (7); and a pressure measuring one-way valve is provided on the pressure measuring tube (12).

6. The power shift clutch and lubrication hydraulic system according to claim 1, characterized in that: One end of the valve core of the pressure regulating valve (3) is connected to its own inlet, and the other end is connected to the pressure relief pipeline (8); the pressure regulating valve (3) is a normally closed valve, and the direction of the pressure difference between the two ends of the valve core of the pressure regulating valve (3) is opposite to the direction of its own reset elastic force.

7. The power shift clutch and lubrication hydraulic system according to claim 1, characterized in that: A filter (13) is also provided at one end of the clutch oil pipeline (5) close to the power pump (1).

8. The power shift clutch and lubrication hydraulic system according to claim 7, characterized in that: The filter (13) is also connected in parallel with a third one-way valve (14).

9. The power shift clutch and lubrication hydraulic system according to claim 8, characterized in that: The filter (13) is also connected in parallel with a flood prevention alarm (15), and the alarm pressure of the flood prevention alarm (15) is lower than the opening pressure of the third one-way valve (14).

10. The power shift clutch and lubrication hydraulic system according to claim 1, characterized in that: It also includes a clutch control solenoid valve group (16) and an oil return pipeline (17), wherein one end of the clutch oil pipeline (5) away from the power pump (1) is connected to the pressure oil port of the clutch control solenoid valve group (16), and the oil return pipeline (17) is connected to the oil return port of the clutch control solenoid valve group (16).

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