A lubricating system and tractor

Abstract

The utility model provides a kind of lubricating system and tractor.A kind of lubricating system, comprising: independently setting pilot oil pump, independently setting lubricating pump, pulse width regulator, regulating safety valve, clutch lubrication control valve, lubricating pressure relief valve and to be lubricated mechanism, the pilot oil pump is connected with the pulse width regulator and the regulating safety valve respectively by pipeline, the pulse width regulator is connected with the regulating safety valve, the lubricating pump is connected with the clutch lubrication control valve by pipeline, the lubricating pressure relief valve is connected with the lubricating pump and the clutch lubrication control valve respectively by pipeline, the lubricating pump, the regulating safety valve and the clutch lubrication control valve are connected with the to be lubricated mechanism by pipeline.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lubrication and oil supply technology, and in particular to a lubrication system and a tractor. Background Technology

[0002] With the development of technology, the market has increasingly higher performance requirements for tractors, and the need to reduce ineffective losses in tractors is also increasing.

[0003] Currently, tractor lubrication systems are mostly integrated with low-pressure control systems. After the pressure is limited by the pressure regulating valve, all the oil is used for lubrication. This not only increases a large amount of ineffective losses in the system, but also causes changes in the amount of oil due to changes in the tractor throttle, resulting in unstable back pressure for lubrication and causing oil seal damage and leakage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lubrication system and a tractor, addressing the shortcomings of the existing technology.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A lubrication system, comprising: an independently configured pilot oil pump, an independently configured lubrication pump, a pulse width regulator, a regulating safety valve, a clutch lubrication control valve, a lubrication pressure relief valve, and a mechanism to be lubricated. The pilot oil pump is connected to the pulse width regulator and the regulating safety valve respectively through pipelines. The pulse width regulator is connected to the regulating safety valve. The lubrication pump is connected to the clutch lubrication control valve through pipelines. The lubrication pressure relief valve is connected to the lubrication pump and the clutch lubrication control valve respectively through pipelines. The lubrication pump, the regulating safety valve, and the clutch lubrication control valve are all connected to the mechanism to be lubricated through pipelines.

[0006] The beneficial effects of adopting this utility model's technical solution are as follows: lubrication and pilot control are separated into two pumps, and the displacement of the pilot oil pump is much smaller than that of an integrated single pump. A pulse width regulator is used to adjust the limiting pressure of the safety valve. The lubrication pump's lubrication oil distribution is controlled by the clutch lubrication control valve, and the lubrication pressure relief valve is used to regulate the lubrication pressure. Once the lubrication flow meets the demand, it is no longer affected by the throttle; excess lubrication oil from throttle applications overflows through the lubrication pressure relief valve. This reduces ineffective losses caused by high pilot standby pressure and also prevents oil seal damage caused by lubrication back pressure impact through the pressure limiting of the lubrication system.

[0007] Furthermore, the mechanism to be lubricated includes: a PTO lubrication structure, a shaft lubrication structure, and a clutch lubrication structure. The PTO lubrication structure and the shaft lubrication structure are both connected to the regulating safety valve and the clutch lubrication control valve through pipelines. The clutch lubrication structure is connected to the clutch lubrication control valve through a pipeline.

[0008] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the lubrication system to supply lubrication to the PTO lubrication structure, shaft lubrication structure and clutch lubrication structure.

[0009] Furthermore, both the pilot oil pump and the lubrication pump are connected to an oil tank via pipelines.

[0010] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the supply of oil to the pilot oil pump and the lubrication pump.

[0011] Furthermore, a filter is installed on the pipeline between the pilot oil pump and the regulating safety valve.

[0012] The beneficial effects of adopting the above-mentioned further technical solutions are: the filter is used to filter impurities in the oil, prevent impurities from entering the lubrication system, and improve the stability and reliability of the lubrication system.

[0013] Furthermore, the pulse width regulator, the regulating safety valve, and the clutch lubrication control valve are all connected to a pilot control oil interface via pipelines.

[0014] The advantages of adopting the above-mentioned further technical solutions are: it facilitates the connection of the system with other mechanisms and facilitates the integration and sharing of pilot oil.

[0015] Furthermore, a lubrication pressure sensor is connected to the pipeline between the lubrication pump and the clutch lubrication control valve.

[0016] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the measurement of lubrication pressure.

[0017] Furthermore, a cooler bypass valve is installed on the pipeline between the regulating safety valve and the clutch lubrication control valve, and a cooler is connected in parallel to the cooler bypass valve.

[0018] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates oil cooling, makes it easier to adapt to different oil temperatures, and improves the applicability of the system.

[0019] Furthermore, the pulse width regulator, the regulating safety valve, the clutch lubrication control valve, and the lubrication pressure relief valve are all connected to an oil tank via pipelines.

[0020] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the collection of return oil from the pulse width regulator, regulating safety valve, clutch lubrication control valve, and lubrication relief valve.

[0021] Furthermore, the pulse width regulator, the regulating safety valve, the clutch lubrication control valve, and the lubrication pressure relief valve are integrated into the same housing.

[0022] The beneficial effects of adopting the above-mentioned further technical solutions are: improved integration, and easier installation and maintenance of pulse width regulators, regulating safety valves, clutch lubrication control valves, and lubrication relief valves.

[0023] In addition, this utility model also provides a tractor, including the lubrication system described above.

[0024] The beneficial effects of adopting this utility model's technical solution are as follows: lubrication and pilot control are separated into two pumps, and the displacement of the pilot oil pump is much smaller than that of an integrated single pump. A pulse width regulator is used to adjust the limiting pressure of the safety valve. The lubrication pump's lubrication oil distribution is controlled by the clutch lubrication control valve, and the lubrication pressure relief valve is used to regulate the lubrication pressure. Once the lubrication flow meets the demand, it is no longer affected by the throttle; excess lubrication oil from throttle applications overflows through the lubrication pressure relief valve. This reduces ineffective losses caused by high pilot standby pressure and also prevents oil seal damage caused by lubrication back pressure impact through the pressure limiting of the lubrication system.

[0025] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the lubrication system provided in an embodiment of the present invention.

[0028] The reference numerals in the attached diagram are as follows: 1. Pilot oil pump; 2. Lubrication pump; 3. Pulse width regulator; 4. Regulating safety valve; 5. Clutch lubrication control valve; 6. Lubrication pressure relief valve; 7. PTO lubrication structure; 8. Shaft lubrication structure; 9. Clutch lubrication structure; 10. Filter; 11. Pilot control oil interface; 12. Lubrication pressure sensor; 13. Cooler bypass valve. Detailed Implementation

[0029] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0034] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model according to the specific circumstances.

[0035] like Figure 1As shown in the figure, this utility model embodiment provides a lubrication system, including: an independently configured pilot oil pump 1, an independently configured lubrication pump 2, a pulse width regulator 3, a regulating safety valve 4, a clutch lubrication control valve 5, a lubrication pressure relief valve 6, and a mechanism to be lubricated. The pilot oil pump 1 is connected to the pulse width regulator 3 and the regulating safety valve 4 through pipelines. The pulse width regulator 3 is connected to the regulating safety valve 4. The lubrication pump 2 is connected to the clutch lubrication control valve 5 through pipelines. The lubrication pressure relief valve 6 is connected to the lubrication pump 2 and the clutch lubrication control valve 5 through pipelines. The lubrication pump 2, the regulating safety valve 4, and the clutch lubrication control valve 5 are all connected to the mechanism to be lubricated through pipelines.

[0036] The beneficial effects of adopting this utility model's technical solution are as follows: lubrication and pilot control are separated into two pumps, and the displacement of the pilot oil pump is much smaller than that of an integrated single pump. A pulse width regulator is used to adjust the limiting pressure of the safety valve. The lubrication pump's lubrication oil distribution is controlled by the clutch lubrication control valve, and the lubrication pressure relief valve is used to regulate the lubrication pressure. Once the lubrication flow meets the demand, it is no longer affected by the throttle; excess lubrication oil from throttle applications overflows through the lubrication pressure relief valve. This reduces ineffective losses caused by high pilot standby pressure and also prevents oil seal damage caused by lubrication back pressure impact through the pressure limiting of the lubrication system.

[0037] Among them, the displacement of the pilot control pump (pilot oil pump) can be smaller than that of the traditional integrated pump.

[0038] Independent pilot control pumps (pilot oil pumps with a smaller displacement than traditional integrated pumps) and lubrication pumps are installed, with the two supplying oil to the pilot control circuit and lubrication circuit respectively, thus achieving functional decoupling. The pilot control pump only meets the small flow requirements of pilot control (its displacement is significantly smaller than that of traditional integrated pumps), reducing unnecessary oil output from the source; the lubrication pump is dedicated to providing lubricating oil for moving parts such as the clutch.

[0039] A pulse width modulation valve (pulse width regulator) is installed in the pilot control circuit. This valve is used to adjust the pressure limit of the pressure regulating valve (regulating safety valve) in the pilot control circuit. When the pilot control oil is not in use (such as when the tractor is in standby mode), the pulse width modulation valve (pulse width regulator) is de-energized, and the pressure limit of the pressure regulating valve (regulating safety valve) is only half of the normal requirement. When pilot control is required, the pulse width modulation valve (pulse width regulator) is energized and adjusts the pressure regulation to the target value according to the actual needs. By dynamically reducing the pressure regulation in non-working states, the ineffective pressure overflow loss of the pilot control circuit is significantly reduced.

[0040] The lubrication circuit is supplied with oil by a lubrication pump, and the distribution of lubricating oil is controlled by a clutch lubrication control valve (e.g., directing oil delivery according to the operating state of different clutches). A lubrication pressure relief valve is also installed to regulate the pressure of the lubrication system. When the lubrication flow rate meets the demand, even if the throttle opening increases, causing an increase in the output flow rate of the lubrication pump, excess lubricating oil will overflow and be released through the lubrication pressure relief valve, ensuring stable lubrication pressure unaffected by throttle changes, thereby preventing oil seal damage due to pressure fluctuations.

[0041] like Figure 1 As shown, the mechanism to be lubricated further includes: a PTO lubrication structure 7, a shaft lubrication structure 8, and a clutch lubrication structure 9. The PTO lubrication structure 7 and the shaft lubrication structure 8 are both connected to the regulating safety valve 4 and the clutch lubrication control valve 5 through pipelines. The clutch lubrication structure 9 is connected to the clutch lubrication control valve 5 through a pipeline.

[0042] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the lubrication system to supply lubrication to the PTO lubrication structure, shaft lubrication structure and clutch lubrication structure.

[0043] like Figure 1 As shown, both the pilot oil pump 1 and the lubrication pump 2 are connected to an oil tank via pipelines.

[0044] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the supply of oil to the pilot oil pump and the lubrication pump.

[0045] Both the pilot oil pump 1 and the lubrication pump 2 can be driven by the same motor, reducing the number of power components and lowering costs.

[0046] like Figure 1 As shown, a filter 10 is further installed on the pipeline between the pilot oil pump 1 and the regulating safety valve 4.

[0047] The beneficial effects of adopting the above-mentioned further technical solutions are: the filter is used to filter impurities in the oil, prevent impurities from entering the lubrication system, and improve the stability and reliability of the lubrication system.

[0048] The filter may be connected in parallel with a check valve.

[0049] like Figure 1 As shown, furthermore, the pulse width regulator 3, the regulating safety valve 4, and the clutch lubrication control valve 5 are all connected to a pilot control oil interface 11 via pipelines.

[0050] The advantages of adopting the above-mentioned further technical solutions are: it facilitates the connection of the system with other mechanisms and facilitates the integration and sharing of pilot oil.

[0051] like Figure 1 As shown, a lubrication pressure sensor 12 is further connected to the pipeline between the lubrication pump 2 and the clutch lubrication control valve 5.

[0052] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the measurement of lubrication pressure.

[0053] like Figure 1 As shown, a cooler bypass valve 13 is further installed on the pipeline between the regulating safety valve 4 and the clutch lubrication control valve 5, and a cooler is connected in parallel to the cooler bypass valve 13.

[0054] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates oil cooling, makes it easier to adapt to different oil temperatures, and improves the applicability of the system.

[0055] like Figure 1 As shown, furthermore, the pulse width regulator 3, the regulating safety valve 4, the clutch lubrication control valve 5, and the lubrication pressure relief valve 6 are all connected to an oil tank via pipelines.

[0056] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the collection of return oil from the pulse width regulator, regulating safety valve, clutch lubrication control valve, and lubrication relief valve.

[0057] like Figure 1 As shown, the pulse width regulator 3, the regulating safety valve 4, the clutch lubrication control valve 5, and the lubrication pressure relief valve 6 are further integrated into the same housing.

[0058] The beneficial effects of adopting the above-mentioned further technical solutions are: improved integration, and easier installation and maintenance of pulse width regulators, regulating safety valves, clutch lubrication control valves, and lubrication relief valves.

[0059] The lubrication system provided in this embodiment of the invention separates lubrication and pilot control into two pumps. The pilot control pump (pilot oil pump) has a much smaller displacement than a single integrated pump. Furthermore, a pulse width modulation valve (pulse width regulator) has been developed. This valve is used to adjust the limiting pressure of the pressure regulating valve (regulating safety valve). When the pilot oil is not in use, the pulse width modulation valve (pulse width regulator) is not energized. At this time, the limiting pressure of the pressure regulating valve (regulating safety valve) is only half of the normal requirement. Adjusting the pressure oil flow and pressure greatly reduces ineffective losses. The lubrication oil distribution of the lubrication pump is controlled by the clutch lubrication control valve. The lubrication pressure relief valve is used to regulate the lubrication pressure. After the lubrication flow meets the requirements, it is no longer affected by the throttle. Excess lubrication oil caused by throttle input overflows through the lubrication pressure relief valve. This reduces hydraulic ineffective losses while preventing damage to the lubrication system oil seals due to fluctuations in lubrication pressure.

[0060] In addition, this utility model also provides a tractor, including the lubrication system described above.

[0061] The beneficial effects of adopting this utility model's technical solution are as follows: lubrication and pilot control are separated into two pumps, and the displacement of the pilot oil pump is much smaller than that of an integrated single pump. A pulse width regulator is used to adjust the limiting pressure of the safety valve. The lubrication pump's lubrication oil distribution is controlled by the clutch lubrication control valve, and the lubrication pressure relief valve is used to regulate the lubrication pressure. Once the lubrication flow meets the demand, it is no longer affected by the throttle; excess lubrication oil from throttle applications overflows through the lubrication pressure relief valve. This reduces ineffective losses caused by high pilot standby pressure and also prevents oil seal damage caused by lubrication back pressure impact through the pressure limiting of the lubrication system.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 utility model.

Claims

1. A lubrication system, characterized in that, include: The system includes an independently configured pilot oil pump, an independently configured lubrication pump, a pulse width regulator, a regulating safety valve, a clutch lubrication control valve, a lubrication pressure relief valve, and a mechanism to be lubricated. The pilot oil pump is connected to the pulse width regulator and the regulating safety valve via pipelines. The pulse width regulator is connected to the regulating safety valve. The lubrication pump is connected to the clutch lubrication control valve via pipelines. The lubrication pressure relief valve is connected to the lubrication pump and the clutch lubrication control valve via pipelines. The lubrication pump, the regulating safety valve, and the clutch lubrication control valve are all connected to the mechanism to be lubricated via pipelines.

2. The lubrication system according to claim 1, characterized in that, The mechanism to be lubricated includes a PTO lubrication structure, a shaft lubrication structure, and a clutch lubrication structure. The PTO lubrication structure and the shaft lubrication structure are both connected to the regulating safety valve and the clutch lubrication control valve through pipelines. The clutch lubrication structure is connected to the clutch lubrication control valve through a pipeline.

3. The lubrication system according to claim 1, characterized in that, Both the pilot oil pump and the lubrication pump are connected to an oil tank via pipelines.

4. A lubrication system according to claim 1, characterized in that, A filter is installed on the pipeline between the pilot oil pump and the regulating safety valve.

5. A lubrication system according to claim 1, characterized in that, The pulse width regulator, the regulating safety valve, and the clutch lubrication control valve are all connected to a pilot control oil port via pipelines.

6. A lubrication system according to claim 1, characterized in that, A lubrication pressure sensor is connected to the pipeline between the lubrication pump and the clutch lubrication control valve.

7. A lubrication system according to claim 1, characterized in that, A cooler bypass valve is installed on the pipeline between the regulating safety valve and the clutch lubrication control valve, and a cooler is connected in parallel to the cooler bypass valve.

8. A lubrication system according to claim 1, characterized in that, The pulse width regulator, the regulating safety valve, the clutch lubrication control valve, and the lubrication pressure relief valve are all connected to an oil tank via pipelines.

9. A lubrication system according to claim 1, characterized in that, The pulse width regulator, the regulating safety valve, the clutch lubrication control valve, and the lubrication pressure relief valve are integrated in the same housing.

10. A tractor, characterized in that, The lubrication system includes any one of claims 1 to 9.

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