Lubricating system for hybrid gearbox of agricultural machine

Abstract

According to the agricultural machine hybrid gearbox lubricating system, comprehensive oil liquid lubrication management of whole gearbox lubrication is achieved, and fixed-point, quantitative and flow-controllable precise lubrication is achieved; aiming at the characteristics that the special hybrid gearbox for the agricultural machine is large and long, the difference of internal parts is large, and the working conditions are changeable and complex, the arrangement of main and auxiliary oil ways is utilized, so that the internal oil management and fixed-point distribution are more accurate, reasonable and controllable. Aiming at real-time working conditions and lubrication requirements, high-low pressure conversion loop lubrication flow compensation is utilized, real-time controllable lubrication flow, low cost, high efficiency and good lubrication effect are achieved, and the comprehensive performance, safety and reliability of a transmission system are improved; in addition, the lubricating system of the agricultural machine hybrid gearbox has a constant temperature control function, a main oil way and an auxiliary oil way share a temperature control loop, the temperature of the gearbox is controlled within a required temperature range according to the use requirement of the agricultural machine hybrid gearbox, the efficiency and reliability of the whole machine are further improved, and the lubricating system is suitable for large-scale industrial use and popularization.

Description

Technical Field

[0001] The utility model belongs to the field of transmission, and in particular relates to a lubrication system for a hybrid transmission of agricultural machinery. Background Art

[0002] The hybrid transmission for agricultural machinery is responsible for pulling, transporting, and hanging a variety of agricultural machinery. It is a highly integrated electromechanical and hydraulic product. Due to the differences in the working conditions of internal components and the complex and changeable external working conditions, the heat dissipation and lubrication requirements of various components inside the transmission are more different than those of traditional transmissions.

[0003] Due to uneven pressure in the lubrication system of the hybrid transmission for agricultural machinery in the existing technology, the parts that need to be lubricated cannot be fully lubricated, and the parts that are not fully lubricated may be at risk of excessive wear and ablation; in addition, due to the large temperature changes during vehicle operation, the uneven oil temperature of the lubricating oil can easily cause damage to the parts, and long-term use can easily affect the driving safety of the vehicle. Summary of the Invention

[0004] The purpose of the utility model is to provide a hybrid transmission lubrication system for agricultural machinery to solve the problem in the prior art that the transmission lubrication system has uneven pressure and temperature, which affects the driving safety of the vehicle.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A hybrid transmission lubrication system for agricultural machinery, comprising an oil tank, a main tank, and an auxiliary tank installed within the transmission; the oil outlet of the oil tank is connected to the oil inlet of the auxiliary tank via a pipeline, and the oil outlet of the auxiliary tank is connected to the oil inlet of the main tank via a pipeline; the system further comprises a twin oil pump disposed within the transmission, the oil outlet of the main tank being connected to the high-pressure oil inlet and the low-pressure oil inlet of the twin oil pump via a high-pressure manifold pipeline and a low-pressure manifold pipeline, respectively;

[0007] The low-pressure oil outlet of the double oil pump is connected to a low-pressure oil outlet pipeline, the low-pressure oil outlet pipeline is connected to the first end of the three-way temperature control valve, the second end of the three-way temperature control valve is connected to the oil inlet of the temperature controller, and the third end is connected to the low-pressure main channel; the oil outlet of the temperature controller is connected to one end of the low-pressure main channel;

[0008] The other end of the low-pressure main channel is divided into two paths, one of which is connected to the clutch shaft oil hole of the agricultural machinery hybrid transmission through the first low-pressure branch, and the other is connected to the intermediate shaft oil hole and input shaft oil hole of the agricultural machinery hybrid transmission through the second low-pressure branch;

[0009] The high-pressure oil outlet of the dual oil pump is connected to the first end of the three-way pressure regulating valve pipeline, the second end of the three-way pressure regulating valve is connected to one end of the high-low pressure conversion branch pipeline, and the other end of the high-low pressure conversion branch pipeline is connected to the low-pressure main channel; the third end of the three-way pressure regulating valve is connected to the high-pressure main channel, and the high-pressure main channel is connected to the synchronizer shaft oil hole of the agricultural machinery hybrid transmission;

[0010] The clutch shaft oil hole, intermediate shaft oil hole, input shaft oil hole and synchronizer shaft oil hole of the agricultural machinery hybrid transmission are all provided with lubricating oil recovery pipes, and all the lubricating oil recovery pipes are connected to the oil inlet of the oil tank.

[0011] The utility model also has the following features:

[0012] Furthermore, a magnetic oil plug is provided inside the pipe between the oil outlet of the oil tank and the oil inlet of the auxiliary tank;

[0013] A first filtering device is provided at the oil inlet of the auxiliary tank.

[0014] Furthermore, a second filtering device is provided at the high-pressure oil outlet of the double oil pump.

[0015] Furthermore, a plurality of first throttle holes are axially provided on the clutch shaft oil hole of the agricultural machinery hybrid transmission.

[0016] Furthermore, the second low-pressure branch is connected to the intermediate shaft oil hole and the input shaft oil hole of the agricultural machinery hybrid transmission through the branch oil pipe;

[0017] A plurality of second throttle holes are axially provided on the branch oil pipe; positions of the plurality of second throttle holes correspond one-to-one to the high-position gears of the agricultural machinery hybrid transmission.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] This utility model's agricultural machinery hybrid transmission lubrication system implements comprehensive oil lubrication management for the entire transmission case, achieving precise lubrication with fixed-point, fixed-quantity, and controllable flow. Given the large and long, widely differentiated internal components, and complex and variable operating conditions of agricultural machinery hybrid transmissions, the system utilizes a primary and secondary dual oil circuit setup to achieve more precise, reasonable, and controllable fixed-point distribution of internal oil management. Based on real-time operating conditions and lubrication requirements, lubrication flow compensation using a high- and low-pressure conversion circuit enables real-time control of lubrication flow, resulting in low cost, high efficiency, and excellent lubrication results, improving the overall performance, safety, and reliability of the transmission system.

[0020] In addition, the agricultural machinery hybrid transmission lubrication system of the utility model has a constant temperature control function, and the main and auxiliary dual oil circuits share a temperature control circuit. According to the use requirements of the agricultural machinery hybrid transmission, the transmission temperature is controlled within the required temperature range, further improving the efficiency and reliability of the entire machine, and is suitable for large-scale use and promotion in industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the double oil pump structure in the utility model;

[0022] Figure 2 This is a schematic diagram of the oil inlet structure of the main tank and auxiliary tank in the utility model;

[0023] Figure 3 This is a schematic diagram of the main box oil inlet structure in the utility model;

[0024] Figure 4 This is a schematic diagram of the connection structure between the double oil pump and the temperature controller in the utility model;

[0025] Figure 5 This is a schematic diagram of the connection structure between the double oil pump and the clutch shaft oil hole in the utility model;

[0026] Figure 6 This is a schematic diagram of the connection structure between the double oil pump, the intermediate shaft oil hole and the input shaft oil hole in the utility model;

[0027] Figure 7 This is a schematic diagram of the high-low voltage conversion branch structure in the utility model;

[0028] Figure 8 This is a schematic diagram of the connection structure between the high-pressure main channel and the synchronizer shaft oil hole in the utility model;

[0029] Figure 9 It is a structural schematic diagram of the magnetic oil plug in the utility model.

[0030] 1. Dual oil pump; 2. High-pressure manifold pipeline; 3. Low-pressure manifold pipeline; 4. Low-pressure oil outlet pipeline; 5. Three-way temperature control valve; 6. Temperature controller; 7. Low-pressure main channel; 8. First low-pressure branch; 9. Clutch shaft oil hole; 10. Second low-pressure branch; 11. Intermediate shaft oil hole; 12. Input shaft oil hole; 13. Three-way pressure regulating valve; 14. High- and low-pressure conversion manifold pipeline; 15. High-pressure main channel; 16. Synchronizer shaft oil hole; 17. Magnetic oil plug; 18. First filter device; 19. Second filter device; 20. Clutch shaft spline; 21. Clutch shaft bearing; 22. Intermediate shaft left bearing; 23. Intermediate shaft right bearing; 24. Input shaft left bearing; 25. Input shaft right bearing. DETAILED DESCRIPTION

[0031] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art. For example, the filter device is a known and commonly used filter device.

[0032] In the present invention, all components involved in transmitting lubricating oil are connected in existing ways, such as pipeline connection, unless otherwise specified.

[0033] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the scope of protection of the present invention.

[0034] like Figure 1-7 As shown, a hybrid transmission lubrication system for agricultural machinery includes an oil tank, a main tank, and an auxiliary tank installed in the transmission; the oil outlet of the oil tank is connected to the oil inlet of the auxiliary tank via a pipeline, and the oil outlet of the auxiliary tank is connected to the oil inlet of the main tank via a pipeline; the system also includes a double oil pump 1 disposed inside the transmission; the oil outlet of the main tank is connected to the high-pressure oil inlet and low-pressure oil inlet of the double oil pump 1 via a high-pressure manifold pipeline 2 and a low-pressure manifold pipeline 3, respectively;

[0035] In this utility model's agricultural machinery hybrid transmission lubrication system, the oil circuit corresponding to the high-pressure oil inlet serves as the main oil circuit, and the oil circuit corresponding to the low-pressure oil inlet serves as the auxiliary oil circuit. This dual-circuit configuration, designed to address the large and long nature of agricultural machinery hybrid transmissions, with widely varying internal components and complex operating conditions, allows for more precise, rational, and controllable internal oil management and distribution.

[0036] The low-pressure oil outlet of the dual oil pump 1 is connected to a low-pressure oil outlet pipeline 4, which is in communication with the first end of a three-way temperature control valve 5. The second end of the three-way temperature control valve 5 is in communication with the oil inlet of a temperature controller 6, and the third end is in communication with a low-pressure main channel 7. The oil outlet of the temperature controller 6 is connected to the low-pressure main channel 7. This arrangement provides the agricultural machinery hybrid transmission lubrication system of the present invention with a constant temperature control function. Because the lubricating oil is ultimately recovered by the lubricating oil recovery pipeline, the primary and secondary oil circuits can share the temperature controller 6. This allows the transmission temperature to be controlled within the required temperature range according to the operating requirements of the agricultural machinery hybrid transmission, further improving the efficiency and reliability of the entire machine.

[0037] The low-pressure main channel 7 is divided into two paths. One path connects to the clutch shaft oil hole 9 of the agricultural hybrid transmission through the first low-pressure branch 8, and the other path connects to the intermediate shaft oil hole 11 and input shaft oil hole 12 of the agricultural hybrid transmission through the second low-pressure branch 10. This lubricates the left and right intermediate shaft bearings 11 and 12 in the intermediate shaft oil hole 11, and the left and right input shaft bearings 24 and 25 in the input shaft oil hole 12.

[0038] The high-pressure oil outlet of the dual oil pump 1 is connected to the first end of the three-way pressure regulating valve 13 through a pipeline. The second end of the three-way pressure regulating valve 13 is connected to one end of the high-low pressure conversion branch pipe 14. The other end of the high-low pressure conversion branch pipe 14 is connected to the low-pressure main channel 7. The third end of the three-way pressure regulating valve 13 is connected to the high-pressure main channel 15. The high-pressure main channel 15 is connected to the synchronizer shaft oil hole 16 of the agricultural machinery hybrid transmission. The above structure can be used as a high-low pressure conversion circuit. According to real-time working conditions and lubrication requirements, the lubrication flow is compensated by the high-low pressure conversion circuit to achieve real-time controllable lubrication flow, low cost, high efficiency, good lubrication effect, and improve the comprehensive performance and safety and reliability of the transmission system.

[0039] Among them, the three-way pressure regulating valve 13 can adopt a known existing automatic pressure regulating valve, which is connected to the controller through conventional means in this field. The controller adopts a known commonly used controller, and uses conventional methods to detect the pressure at the high-pressure oil outlet, and then adjusts the opening and closing of the three-way pressure regulating valve 13 by conventional methods to achieve automatic control.

[0040] Lubricating oil recovery pipes are provided inside the clutch shaft oil hole 9, intermediate shaft oil hole 11, input shaft oil hole 12 and synchronizer shaft oil hole 16 of the agricultural machinery hybrid transmission, and all lubricating oil recovery pipes are connected to the oil inlet of the oil tank.

[0041] As a preferred solution, Figure 8 As shown, a magnetic oil plug 17 is provided inside the pipe between the oil tank outlet and the auxiliary tank inlet; it is used to absorb iron filings and impurities in the oil to achieve the initial purpose of oil cleaning.

[0042] A first filtering device 18 is provided at the oil inlet of the auxiliary tank.

[0043] Further preferably, a second filter device 19 is provided at the high-pressure oil outlet of the double oil pump 1. The lubricating oil is further filtered by the first filter device 18 and the second filter device 19 to achieve the purpose of further cleaning the oil.

[0044] As a preferred solution, multiple first throttle holes are axially provided on the clutch shaft oil hole 9 of the agricultural machinery hybrid transmission. The multiple first throttle holes axially provided on the clutch shaft oil hole 9 further enhance the lubrication effect on the clutch shaft spline 20 and clutch shaft bearing 21 inside the clutch shaft oil hole.

[0045] Further preferably, the second low-pressure branch 10 is connected to the intermediate shaft oil hole 11 and the input shaft oil hole 12 of the agricultural machinery hybrid transmission through branch oil pipes;

[0046] Multiple second throttle holes are axially defined on the branch oil pipe; these holes correspond to the high-position gears of the agricultural hybrid transmission, further enhancing the lubrication of the high-position gears.

Claims

1. A hybrid transmission lubrication system for agricultural machinery, comprising an oil tank, a main tank, and an auxiliary tank installed in the transmission; the oil outlet of the oil tank is connected to the oil inlet of the auxiliary tank via a pipeline, and the oil outlet of the auxiliary tank is connected to the oil inlet of the main tank via a pipeline; characterized in that: It also includes a double oil pump (1) arranged inside the gearbox, wherein the main box oil outlet is connected to the high-pressure oil inlet and the low-pressure oil inlet of the double oil pump (1) through a high-pressure manifold pipe (2) and a low-pressure manifold pipe (3) respectively; The low-pressure oil outlet of the double oil pump (1) is connected to a low-pressure oil outlet pipeline (4), the low-pressure oil outlet pipeline (4) is connected to a first end of a three-way temperature control valve (5), the second end of the three-way temperature control valve (5) is connected to an oil inlet of a temperature controller (6), and the third end is connected to a low-pressure main channel (7); the oil outlet of the temperature controller (6) is connected to one end of the low-pressure main channel (7); The other end of the low-pressure main channel (7) is divided into two paths, one of which is connected to the clutch shaft oil hole (9) of the agricultural machinery hybrid transmission through the first low-pressure branch (8), and the other is connected to the intermediate shaft oil hole (11) and the input shaft oil hole (12) of the agricultural machinery hybrid transmission through the second low-pressure branch (10); The high-pressure oil outlet of the dual oil pump (1) is connected to the first end of the three-way pressure regulating valve (13) through a pipeline, the second end of the three-way pressure regulating valve (13) is connected to one end of the high-low pressure conversion branch pipeline (14), and the other end of the high-low pressure conversion branch pipeline (14) is connected to the low-pressure main channel (7); the third end of the three-way pressure regulating valve (13) is connected to the high-pressure main channel (15), and the high-pressure main channel (15) is connected to the synchronizer shaft oil hole (16) of the agricultural machinery hybrid transmission; The clutch shaft oil hole (9), the intermediate shaft oil hole (11), the input shaft oil hole (12) and the synchronizer shaft oil hole (16) of the agricultural machinery hybrid transmission are all provided with lubricating oil recovery pipes, and all the lubricating oil recovery pipes are connected to the oil inlet of the oil tank.

2. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: A magnetic oil plug (17) is provided inside the pipeline between the oil outlet of the oil tank and the oil inlet of the auxiliary tank; A first filtering device (18) is provided at the oil inlet of the auxiliary tank.

3. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: A second filtering device (19) is provided at the high-pressure oil outlet of the double oil pump (1).

4. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: A plurality of first throttle holes are provided in the axial direction on the clutch shaft oil hole (9) of the hybrid gearbox for agricultural machinery.

5. The agricultural machinery hybrid transmission lubrication system according to claim 1, characterized in that: The second low-pressure branch (10) is connected to the intermediate shaft oil hole (11) and the input shaft oil hole (12) of the agricultural machinery hybrid transmission through branch oil pipes; A plurality of second throttle holes are axially provided on the branch oil pipe; positions of the plurality of second throttle holes correspond one-to-one to the high-position gears of the agricultural machinery hybrid transmission.

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