Gearbox lubricating and cooling system and tractor

Abstract

The utility model relates to the technical field of agricultural equipment, in particular to a gearbox lubrication and heat dissipation system and a tractor, the gearbox lubrication and heat dissipation system comprises a gearbox, and an oil medium is arranged in the gearbox; the oil supply assembly is connected with the gearbox; the lifting assembly comprises an oil inlet and an oil outlet, and the oil inlet is connected with the oil supply assembly; the oil outlet is connected with the heat dissipation assembly; and the heat dissipation assembly is connected with the wet clutch. According to the gearbox lubricating and cooling system, the flow of the oil medium is stable, the cooled gearbox oil serves as the oil medium to conduct heat dissipation on the wet clutches, and the situation that the wet clutches are in a high-temperature state for a long time due to continuous heating in the working process, and the service life of the wet clutches is affected can be avoided.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery and equipment technology, and in particular to a gearbox lubrication and cooling system and a tractor. Background Technology

[0002] Currently, tractors play an indispensable role in agricultural production as a conventional agricultural machine. The wet clutch, as a core component of the tractor, directly affects the overall operating experience. High temperature is a crucial indicator affecting the performance of the wet clutch, as it generates a significant amount of heat during operation. Therefore, a certain flow of lubricating oil is needed for lubrication and cooling to ensure its long-term normal operation. To effectively dissipate heat from the wet clutch, a lubrication hydraulic system with stable lubrication flow and reliable heat dissipation is required. Existing wet clutches rely on oil splashing for heat dissipation, which is ineffective. Prolonged tractor operation can easily lead to high temperatures in the wet clutch, affecting its lifespan. Utility Model Content

[0003] The purpose of this application is to provide a gearbox lubrication and cooling system and a tractor, so as to solve to some extent the technical problems of poor heat dissipation capacity and poor heat dissipation effect of wet clutches in tractors in the prior art.

[0004] This application provides a gearbox lubrication and cooling system, including: a gearbox, wherein the gearbox contains an oil medium;

[0005] A fuel supply assembly, which is connected to the gearbox;

[0006] A lifting assembly, the lifting assembly including an oil inlet and an oil outlet, the oil inlet being connected to the oil supply assembly;

[0007] A heat dissipation assembly, wherein the oil outlet is connected to the heat dissipation assembly;

[0008] A wet clutch, wherein the heat dissipation assembly is connected to the wet clutch.

[0009] In the above technical solution, the lifting component further includes a lifting valve, which is provided with an oil inlet and an oil outlet;

[0010] The lifting valve includes an intermediate valve position, a lifting valve position, and a lowering valve position, and the intermediate valve position, the lifting valve position, and the lowering valve position can be used alternately as the working valve positions.

[0011] In any of the above technical solutions, the lifting assembly further includes a lifting cylinder, which is connected to the lifting valve.

[0012] In any of the above technical solutions, the heat dissipation component further includes:

[0013] A radiator is disposed between the oil outlet and the wet clutch;

[0014] A bypass branch is provided, which is connected in parallel with the radiator;

[0015] A bypass valve is provided in the bypass branch.

[0016] In any of the above technical solutions, the gearbox lubrication and cooling system further includes:

[0017] A connecting pipe assembly, which is connected to the heat sink;

[0018] A back pressure valve is provided in the connecting pipe assembly.

[0019] In any of the above technical solutions, the gearbox lubrication and cooling system further includes a connecting assembly, and the number of wet clutches is multiple, with the multiple wet clutches connected to the connecting pipe assembly through the connecting assembly.

[0020] In any of the above technical solutions, further, the plurality of said wet clutches include at least: a forward gear wet clutch, a reverse gear wet clutch, a first gear wet clutch, a second gear wet clutch, a third gear wet clutch, and a fourth gear wet clutch.

[0021] In any of the above technical solutions, the gearbox lubrication and cooling system further includes:

[0022] An oil inlet pipe, one end of which is connected to the oil inlet, and the other end of which is connected to the oil supply assembly;

[0023] An oil outlet pipe, one end of which is connected to the oil outlet, and the other end of which is connected to the heat dissipation assembly;

[0024] An overflow valve is connected to both the oil inlet pipe and the oil outlet pipe.

[0025] In any of the above technical solutions, the oil supply component further includes:

[0026] An oil suction filter, which is connected to the gearbox;

[0027] A pump body is disposed between the oil suction filter and the oil inlet.

[0028] This application also provides a tractor that includes the gearbox lubrication and cooling system described in any of the above technical solutions, and thus has all the beneficial technical effects of the gearbox lubrication and cooling system, which will not be repeated here.

[0029] Compared with the prior art, the beneficial effects of this application are as follows:

[0030] The gearbox lubrication and cooling system provided in this application includes: a gearbox containing an oil medium; an oil supply assembly connected to the gearbox; a lifting assembly including an oil inlet and an oil outlet, the oil inlet being connected to the oil supply assembly; a cooling assembly with the oil outlet connected to the cooling assembly; and a wet clutch connected to the wet clutch.

[0031] The transmission lubrication and cooling system provided in this application has a stable oil medium flow rate and uses cooled transmission oil as the oil medium to cool each wet clutch. This can prevent the wet clutch from continuously heating up during operation, which would cause the wet clutch to be in a high-temperature state for a long time and affect the life of the wet clutch.

[0032] The tractor provided in this application includes the aforementioned gearbox lubrication and cooling system. Therefore, this gearbox lubrication and cooling system can effectively reduce the probability of the wet clutch experiencing abnormal high temperatures and being forced to stop, thereby reducing the failure rate of the tractor and effectively avoiding frequent stops and repairs that affect the tractor's operating efficiency. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the gearbox lubrication and cooling system provided in an embodiment of this application.

[0035] Figure label:

[0036] 1-Gearbox, 2-Suction filter, 3-Pump body, 4-Lift valve, 401-Intermediate valve position, 402-Lift valve position, 403-Lower valve position, 404-Inlet pipe, 405-Outlet pipe, P-Inlet port, T-Outlet port, A-First connection port, B-Second connection port, 5-Radiator, 6-Bypass valve, 7-Back pressure valve, 8-First lifting cylinder, 801-First drive rod, 802-First lifting chamber, 803-First lowering chamber, 9-Second lifting cylinder, 10-First throttle connector, 11-Second throttle connector, 12-First connecting pipe, 13-Second connecting pipe, 14-Main pipeline, 15-Branch pipeline, 16-Forward gear wet clutch, 17-Reverse gear wet clutch, 18-I gear wet clutch, 19-II gear wet clutch, 20-III gear wet clutch, 21-IV gear wet clutch, 22-Relief valve. Detailed Implementation

[0037] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0038] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0039] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be noted that the terms "center," "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. They are used 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] The following reference Figure 1 This application describes a gearbox lubrication and cooling system and a tractor according to embodiments thereof.

[0043] See Figure 1 As shown, an embodiment of this application provides a gearbox lubrication and cooling system. This gearbox lubrication and cooling system includes: a gearbox 1, an oil supply assembly, a lifting assembly, a cooling assembly, and a wet clutch, wherein the wet clutch serves as the cooling target of this gearbox lubrication and cooling system. The gearbox 1 contains an oil medium, which may be, but is not limited to, hydraulic oil. The oil supply assembly is connected to the gearbox 1, and the lifting assembly is connected to the oil supply assembly. Under the action of the oil supply assembly, the oil medium in the gearbox 1 is supplied to the lifting assembly. The lifting assembly is connected to the cooling assembly, and the cooling assembly is connected to the wet clutch. The oil medium flowing out of the lifting assembly can flow into the cooling assembly for cooling, and the cooled oil medium flows to the wet clutch, thereby lubricating and cooling the wet clutch.

[0044] It should be noted that in this embodiment, there are multiple wet clutches. Specifically, there are six wet clutches in this embodiment: forward gear wet clutch 16, reverse gear wet clutch 17, I gear wet clutch 18, II gear wet clutch 19, III gear wet clutch 20, and IV gear wet clutch 21. It can be seen that the gearbox lubrication and cooling system provided in this embodiment can dissipate heat from the above multiple wet clutches.

[0045] Specifically, the lifting assembly includes a lifting valve 4, which includes at least an intermediate valve position 401, a lifting valve position 402, and a lowering valve position 403. The three working positions of the lifting valve 4 can be switched, and different working positions correspond to different oil circuits.

[0046] The lift valve 4 has an oil inlet P and an oil outlet T in its valve body, as well as a first connection port A and a second connection port B. One of the first connection port A and the second connection port B is the oil supply port, and the other is the oil return port. As the working position changes, the flow direction of the oil medium in the first connection port A and the second connection port B changes accordingly. When the first connection port A is used as the oil supply port, the second connection port B is the oil return port, and when the first connection port A is used as the oil return port, the second connection port B is the oil supply port.

[0047] The transmission lubrication and cooling system also includes a first pipe and a second pipe, the first pipe being located at the first connection port A and the second pipe being located at the second connection port B. The transmission lubrication and cooling system also includes an oil inlet pipe 404 and an oil outlet pipe 405, the oil inlet pipe 404 being located at the oil inlet port P and the oil outlet pipe 405 being located at the oil outlet port T.

[0048] Furthermore, the lifting assembly also includes a lifting cylinder, specifically a tractor lifting cylinder, which can be connected to agricultural implements. As the oil medium in the lifting cylinder flows in and out, the agricultural implements can rise or fall accordingly to carry out agricultural work.

[0049] The number of lifting cylinders is at least one. In this embodiment, the number of lifting cylinders is preferably two, but it is not limited to this. The two lifting cylinders are a first lifting cylinder 8 and a second lifting cylinder 9.

[0050] The first lifting cylinder 8 includes a first cylinder body and a first drive rod 801. A portion of the first drive rod 801 passes through the first cylinder body and is capable of extending or retracting relative to the first cylinder body. A plunger is provided at one end of the first drive rod 801 within the first cylinder body, dividing the internal space of the first cylinder body into a first lifting chamber 802 and a first lowering chamber 803. One end of the first drive rod 801 extending outside the first cylinder body is connected to an agricultural implement. Correspondingly, the second lifting cylinder 9 includes a second cylinder body and a second drive rod. The second cylinder body forms a second lifting chamber and a second lowering chamber, and the second drive rod is connected to the agricultural implement.

[0051] The first lifting chamber 802 and the second lifting chamber are connected by a first connecting pipe 12, and the first lowering chamber 803 and the second lowering chamber are connected by a second connecting pipe 13. One end of the first pipe is connected to the first connection port A, and the other end of the first pipe is connected to the first connecting pipe 12. One end of the second pipe is connected to the second connection port B, and the other end of the second pipe is connected to the second connecting pipe 13, so that the first lifting chamber 802 and the second lifting chamber can simultaneously receive or discharge oil, and the first lowering chamber 803 and the second lowering chamber can simultaneously receive or discharge oil, thereby ensuring the stability of the agricultural implement's operation.

[0052] It should be noted that when there are more than two lifting cylinders, a tee connector can be added to the first connecting pipe 12 and the second connecting pipe 13 to connect more lifting cylinders, so as to ensure that all lifting cylinders operate synchronously. This is something that those skilled in the art can fully understand.

[0053] like Figure 1As shown, when the lift valve 4 is in the intermediate valve position 401, the oil medium flows into the lift valve 4 through the oil inlet P and then flows out through the oil outlet T. The oil medium flows directly to the radiator 5 without passing through the lift cylinder. At this time, the lubrication and cooling system of this gearbox only plays a cooling role for each wet clutch.

[0054] When the lift valve 4 is in the lift valve position 402, the oil medium flows into the lift valve 4 through the oil inlet P, flows out through the first connection port A and flows to the first lift chamber 802 and the second lift chamber, so that the first drive rod 801 and the second drive rod rise. The oil medium in the first descending chamber 803 and the second descending chamber flows back to the lift valve 4 through the second connection port B and flows to the radiator 5 through the oil outlet T.

[0055] When the lift valve 4 is in the lowering valve position 403, the oil medium enters the lift valve 4 through the oil inlet P, and then flows through the second connection port B to the first lowering chamber 803 and the second lowering chamber, so that the first drive rod 801 and the second drive rod descend. The oil medium in the first lift chamber 802 and the second lift chamber flows back to the lift valve 4 through the first connection port A and flows to the radiator 5 through the oil outlet T.

[0056] The oil supply assembly includes a pump body 3 and an oil suction filter 2. The gearbox 1 has an outlet. One end of an oil inlet pipe 404 is connected to the oil inlet P, and the other end of the oil inlet pipe 404 is connected to the outlet of the gearbox 1. Both the pump body 3 and the oil suction filter 2 are mounted on the oil inlet pipe 404, with the oil suction filter 2 located near the outlet of the gearbox 1. Specifically, the pump body 3 can be a tractor's lifting gear pump. After starting, the pump body 3 pumps the oil medium from the gearbox 1, and the oil medium can be filtered through the oil suction filter 2 to remove impurities. The outlet of the pump body 3 is connected to the lifting assembly, thereby pumping the oil medium to the lifting assembly.

[0057] Furthermore, the heat dissipation component includes a radiator 5, specifically a hydraulic oil radiator commonly used in the prior art. One end of the oil outlet pipe 405 is connected to the oil outlet T, and the other end of the oil outlet pipe 405 is connected to the inlet of the radiator 5, so that the return oil from the lift valve 4 flows out through the oil outlet T of the lift valve 4 and then flows into the radiator 5 for heat dissipation and cooling. The outlet of the radiator 5 is used to connect to a wet clutch.

[0058] Preferably, the gearbox lubrication and cooling system further includes an overflow valve 22. One port of the overflow valve 22 is connected to the oil inlet pipe 404, and the other port of the overflow valve 22 is connected to the oil outlet pipe 405, so that when the lift valve 4 is closed, the oil medium pumped out by the pump body 3 can flow from the oil inlet pipe 404 and the overflow valve 22 to the oil outlet pipe 405, thus avoiding damage to the pump body 3.

[0059] Furthermore, the heat dissipation assembly also includes a bypass branch, one end of which is connected to the inlet of the radiator 5, and the other end of which is connected to the outlet of the radiator 5. A bypass valve 6 is provided on the bypass branch. When the radiator 5 fails, the bypass valve 6 is opened, and the oil medium flows through the bypass valve 6.

[0060] Furthermore, the gearbox lubrication and cooling system also includes a connecting pipe assembly located at the outlet of the radiator 5. The connecting pipe assembly includes a main pipe 14 and branch pipes 15, wherein the main pipe 14 is connected to the outlet of the radiator 5, and there are multiple branch pipes 15, each of which is connected to the main pipe 14.

[0061] Furthermore, this gearbox lubrication and cooling system also includes a back pressure valve 7, which is located on the main pipeline 14. One end of the main pipeline 14 is located away from each branch pipeline 15, and the back pressure valve 7 is located at this end. The back pressure valve 7 can increase the pressure of the oil medium flowing into the main pipeline 14, causing the pressurized oil medium to flow to each branch pipeline 15 in a forced flow manner, and finally flow to each wet clutch through the branch pipeline 15 to lubricate and cool each wet clutch. Compared with the existing oil splash cooling method, this embodiment significantly improves the cooling effect and efficiency of the oil medium on each wet clutch, effectively reduces the probability of high temperature in the wet clutch, and thus improves the service life of each wet clutch. It should be noted that the back pressure valve 7 can specifically be a one-way valve with an adjustable opening.

[0062] Furthermore, the transmission lubrication and cooling system also includes connecting components. Preferably, the number of connecting components is half the number of wet clutches, and every two wet clutches are connected to a connecting pipe assembly through a set of connecting components. Specifically, taking the connection between the forward gear wet clutch 16 and the reverse gear wet clutch 17 as an example, the connecting components include a first throttle connector 10 and a second throttle connector 11. The first throttle connector 10 and the second throttle connector 11 are respectively connected to one of the branch pipes 15. The forward gear wet clutch 16 is connected to the first throttle connector 10, and the reverse gear wet clutch 17 is connected to the second throttle connector 11, so that the cooled oil medium can flow to the forward gear wet clutch 16 through the first throttle connector 10 and to the reverse gear wet clutch 17 through the second throttle connector 11. By selecting throttle connectors with different throttle orifice diameters, different oil supply flow rates can be matched to each wet clutch.

[0063] The connection methods of other wet clutches and connecting components are the same as described above. The I-gear wet clutch 18 and the II-gear wet clutch 19 are connected to another branch pipe 15 through the second connecting component, and the III-gear wet clutch 20 and the IV-gear wet clutch 21 are connected to other branch pipes 15 through the third connecting component. Those skilled in the art can fully understand this, and it will not be described in detail here.

[0064] In summary, the transmission lubrication and cooling system provided in this application has a stable oil medium flow rate and uses cooled transmission oil as the oil medium to cool each wet clutch, which can prevent the wet clutch from continuously heating up during operation, causing the wet clutch to be in a high-temperature state for a long time and affecting the life of the wet clutch.

[0065] The embodiments of this application also provide a tractor that includes the gearbox lubrication and cooling system described in any of the above embodiments, and thus has all the beneficial technical effects of the gearbox lubrication and cooling system, which will not be repeated here.

[0066] The tractor provided in this application, by configuring the aforementioned gearbox lubrication and cooling system, can effectively reduce the probability of the wet clutch overheating and being forced to stop, thereby reducing the failure rate of the tractor and effectively avoiding frequent stops and repairs that affect the working efficiency of the tractor.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gearbox lubrication and heat dissipation system, characterized in that, The gearbox lubrication and heat dissipation system comprises: a gearbox containing oil medium; an oil supply assembly connected with the gearbox; a lifting assembly comprising an oil inlet and an oil outlet, the oil inlet being connected with the oil supply assembly; a heat dissipation assembly connected with the oil outlet; a wet clutch connected with the heat dissipation assembly.

2. The gearbox lubrication heat sink system of claim 1, wherein, The lifting assembly comprises a lifting valve provided with the oil inlet and the oil outlet. The lifting valve comprises an intermediate valve position, a lifting valve position and a falling valve position, which can be alternately used as an operating valve position.

3. The gearbox lubrication heat sink system of claim 2, wherein, The lifting assembly further comprises a lifting oil cylinder connected with the lifting valve.

4. The gearbox lubrication heat sink system of claim 1, wherein, The heat dissipation assembly comprises: a radiator arranged between the oil outlet and the wet clutch; a bypass branch arranged in parallel with the radiator; a bypass valve arranged in the bypass branch.

5. The gearbox lubrication heat sink system of claim 4, wherein, The gearbox lubrication and heat dissipation system further comprises: a connecting pipe group connected with the radiator; a back pressure valve arranged in the connecting pipe group.

6. The gearbox lubrication heat sink system of claim 5, wherein, The gearbox lubrication and heat dissipation system further comprises a connecting assembly, the number of the wet clutches is multiple, and the multiple wet clutches are connected with the connecting pipe group through the connecting assembly.

7. The gearbox lubrication heat sink system of claim 6, wherein, The multiple wet clutches at least comprise: a forward gear wet clutch, a reverse gear wet clutch, a first gear wet clutch, a second gear wet clutch, a third gear wet clutch and a fourth gear wet clutch.

8. The gearbox lubrication heat sink system of any one of claims 1-7, wherein, The gearbox lubrication and heat dissipation system further comprises: an oil inlet pipe, one end of which is connected with the oil inlet, and the other end of which is connected with the oil supply assembly; an oil outlet pipe, one end of which is connected with the oil outlet, and the other end of which is connected with the heat dissipation assembly; an overflow valve connected with the oil inlet pipe and the oil outlet pipe.

9. The gearbox lubrication heat sink system of any one of claims 1-7, wherein, The oil supply assembly comprises: an oil suction filter connected with the gearbox; a pump body arranged between the oil suction filter and the oil inlet.

10. A tractor characterised in that, The gearbox lubrication and heat dissipation system comprises any one of claims 1 to 9. The gearbox lubrication and heat dissipation system comprises any one of claims 1 to 9.

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