A power source for hydraulic control of a gearbox

Abstract

The utility model relates to a kind of gearbox hydraulic control power source, comprising: hydraulic oil tank, for storing oil liquid;High-pressure oil liquid generating mechanism, connecting hydraulic oil tank, for pumping oil liquid from hydraulic oil tank to generate high-pressure oil liquid;Motor-pump integrated mechanism, connecting high-pressure oil liquid generating mechanism, hydraulic oil tank and gearbox, for producing mechanical energy under the drive of high-pressure oil liquid and then high-pressure oil liquid is sent back to hydraulic oil tank, and under the drive of mechanical energy, the oil liquid of the liquid accumulation area of gearbox is extracted and sent to the wet control system of gearbox.The utility model generates high-pressure oil liquid by high-pressure oil liquid generating mechanism, which can be transported to gearbox area through long-distance pipeline, which can replace mechanical transmission to solve the problem of long distance and large height difference layout of engine-gearbox;Motor-pump integrated mechanism returns the oil liquid gathered at the bottom of gearbox to the wet control system of gearbox, and then enters the liquid accumulation area of gearbox through leakage, forming a closed loop circulation, reducing additional oil consumption.

Description

Technical Field

[0001] This utility model relates to the field of hydraulics, specifically to a hydraulic control power source for a gearbox. Background Technology

[0002] Currently, large agricultural harvesting machinery generally uses wet clutch gearboxes due to their high load-bearing capacity. Their shifting mechanisms, brakes, and differential locks all rely on hydraulic systems to transmit power. However, wet clutch chambers employ a double-sealed structure, which inevitably leads to oil leakage after long-term operation.

[0003] To address transmission fluid leakage, current technologies often employ mechanical transmission methods to extract fluid from the bottom of the transmission where leakage has occurred. However, due to the significant distance and height difference between the engine and the transmission, the mechanical transmission layout is quite challenging.

[0004] In addition, existing technologies also employ electric pumps to address gearbox fluid leaks. Large agricultural harvesting machinery operates in harsh environments, typically characterized by high temperature and humidity. Electric pump solutions require batteries, but battery life is reduced by 50% under high temperature and humidity conditions, and the connecting cable between the electric pump and the battery is easily entangled by crops. Utility Model Content

[0005] This utility model provides a hydraulic control power source for a gearbox to solve at least one of the above-mentioned technical problems.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A hydraulic control power source for a gearbox, comprising: Hydraulic oil tank, used to store hydraulic fluid; A high-pressure oil generating mechanism is connected to the hydraulic oil tank and is used to draw oil from the hydraulic oil tank to generate high-pressure oil. The motor-pump integrated mechanism connects the high-pressure oil generating mechanism, the hydraulic oil tank, and the gearbox. It is used to generate mechanical energy under the drive of the high-pressure oil and then return the high-pressure oil to the hydraulic oil tank. Under the drive of the mechanical energy, it also draws oil from the fluid accumulation area of ​​the gearbox and delivers it to the wet control system of the gearbox.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the high-pressure oil generating mechanism includes: An engine is used to generate driving force; The main hydraulic pump, whose inlet is connected to the hydraulic oil tank and whose drive shaft is connected to the engine, is used to draw oil from the hydraulic oil tank under the drive of the engine to generate high-pressure oil.

[0009] Furthermore, the motor-pump integrated mechanism includes: A hydraulic motor, whose inlet is connected to the outlet of the main hydraulic pump and whose outlet is connected to the hydraulic oil tank, is used to generate rotational mechanical energy under the drive of the high-pressure oil and then transport the high-pressure oil back to the hydraulic oil tank. An oil suction pump has its inlet connected to the fluid accumulation area of ​​the gearbox and its outlet connected to the wet control system of the gearbox. Its drive shaft is connected to the hydraulic motor for generating suction under the rotation of the hydraulic motor to draw oil from the fluid accumulation area of ​​the gearbox and deliver it to the wet control system of the gearbox.

[0010] Furthermore, a radiator is connected in series between the outlet of the oil suction pump and the wet control system of the gearbox.

[0011] Furthermore, a filter is connected in series between the outlet of the oil suction pump and the wet control system of the gearbox.

[0012] Furthermore, a control valve assembly is connected in series between the outlet of the oil suction pump and the wet control system of the gearbox.

[0013] Furthermore, the wet control system of the transmission includes a wet clutch, a wet differential lock device, and a wet parking device. The control valve group includes a wet clutch control valve, a wet differential lock control valve, and a wet parking control valve. The outlet of the oil pump is connected to the wet clutch through the wet clutch control valve, the outlet of the oil pump is connected to the wet differential lock device through the wet differential lock control valve, and the outlet of the oil pump is connected to the wet parking device through the wet parking control valve.

[0014] Furthermore, a first overflow valve is connected between the inlet of the hydraulic motor and the hydraulic oil tank.

[0015] Furthermore, a second overflow valve is connected between the outlet of the oil suction pump and the fluid accumulation area of ​​the gearbox.

[0016] Furthermore, the hydraulic motor and the oil suction pump share the same housing.

[0017] The beneficial effects of this utility model are as follows: This utility model provides a hydraulic control power source for a transmission that generates high-pressure oil through a high-pressure oil generating mechanism. This oil can be transported to the transmission area via long-distance pipelines, replacing mechanical transmission and solving the problem of long-distance, large-elevation-difference engine-transmission layouts. Furthermore, the hydraulic pipeline's vibration resistance is superior to that of a universal joint driveshaft. The motor-pump integrated mechanism returns the oil accumulated at the bottom of the transmission to the transmission's wet clutch control system, and then, through leakage, enters the transmission fluid accumulation area, forming a closed-loop circulation. This reduces external fluid consumption and eliminates transmission fluid accumulation caused by internal leakage in the wet clutch. Additionally, this utility model does not include a battery; therefore, it can solve a series of problems associated with electric pumps in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a hydraulic control power source for a gearbox according to the present invention; The attached diagram lists the components represented by each number as follows: 1. Hydraulic oil tank; 2. High-pressure oil generation mechanism; 21. Engine; 22. Main hydraulic pump; 3. Motor-pump integrated mechanism; 31. Hydraulic motor; 32. Oil suction pump; 4. Gearbox; 41. Liquid accumulation area; 42. Wet control system; 421. Wet clutch; 422. Wet differential lock device; 423. Wet parking device; 5. Radiator; 6. Filter; 7. Control valve group; 71. Wet clutch control valve; 72. Wet differential lock control valve; 73. Wet parking control valve; 8. First relief valve; 9. Second relief valve. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] like Figure 1 As shown, a hydraulic control power source for a gearbox includes: Hydraulic oil tank 1 is used to store hydraulic oil; High-pressure oil generating mechanism 2 is connected to the hydraulic oil tank 1 and is used to draw oil from the hydraulic oil tank 1 to generate high-pressure oil; The motor-pump integrated mechanism 3 connects the high-pressure oil generating mechanism 2, the hydraulic oil tank 1, and the gearbox 4. It is used to generate mechanical energy under the drive of the high-pressure oil and then return the high-pressure oil to the hydraulic oil tank 1. Under the drive of the mechanical energy, it draws the oil from the fluid accumulation area 41 of the gearbox 4 and delivers it to the wet control system 42 of the gearbox 4.

[0021] In some embodiments, the high-pressure oil generating mechanism 2 includes: Engine 21 is used to generate driving force; The main hydraulic pump 22 has its inlet connected to the hydraulic oil tank 1 and its drive shaft connected to the engine 21. It is used to draw oil from the hydraulic oil tank 1 under the drive of the engine 21 to generate high-pressure oil.

[0022] The motor-pump integrated mechanism 3 includes: A hydraulic motor 31, whose inlet is connected to the outlet of the main hydraulic pump 22 and whose outlet is connected to the hydraulic oil tank 1, is used to generate rotational mechanical energy under the drive of the high-pressure oil and then transport the high-pressure oil back to the hydraulic oil tank 1. The oil suction pump 32 has its inlet connected to the fluid accumulation area 41 of the gearbox 4 and its outlet connected to the wet control system 42 of the gearbox 4. Its drive shaft is connected to the hydraulic motor 31 for generating suction under the rotation of the hydraulic motor 31 to draw oil from the fluid accumulation area 41 of the gearbox 4 and deliver it to the wet control system 42 of the gearbox 4.

[0023] Specifically, the working process of the hydraulic control power source for the gearbox of this utility model is as follows: the output shaft of the engine 21 drives the main hydraulic pump 22 to draw oil from the hydraulic oil tank 1 and deliver it through pipelines to the motor-pump integrated mechanism 3 in the gearbox area; the hydraulic motor 31 (cycloidal motor) and the suction pump 32 (internal gear pump) in the motor-pump integrated mechanism 3 are integrated into one unit. The main hydraulic pump 22 draws oil from the hydraulic oil tank 1 and delivers it through pipelines to the hydraulic motor 31 to drive the hydraulic motor 31 to work. Then the hydraulic oil returns to the hydraulic oil tank 1 through the hydraulic motor 31. The hydraulic motor 31 rotates and synchronously drives the coaxially connected suction pump 32 to work, thereby drawing the accumulated oil from the fluid accumulation area 41 at the bottom of the gearbox 4 to the wet control system 42 of the gearbox 4, and then leaks back into the fluid accumulation area 41 of the gearbox 4, forming a closed loop circulation.

[0024] In some embodiments, a radiator 5, a filter 6, and a control valve group 7 are connected in series between the outlet of the oil pump 32 and the wet control system 42 of the gearbox 4.

[0025] Specifically, during the closed-loop circulation process, the oil pump 32 draws the accumulated oil from the fluid accumulation area 41 at the bottom of the transmission 4 to the wet control system 42 of the transmission 4 and then leaks back into the fluid accumulation area 41 of the transmission 4. The oil drawn by the oil pump 32 is cooled by the radiator 5 and then enters the wet control system 42 through the filter 6 and the control valve group 7. The oil then leaks back into the fluid accumulation area 41 of the transmission 4.

[0026] In some embodiments, the wet control system 42 of the transmission 4 includes a wet clutch 421, a wet differential lock device 422, and a wet parking device 423; the control valve group 7 includes a wet clutch control valve 71, a wet differential lock control valve 72, and a wet parking control valve 73; the outlet of the oil pump 32 is connected to the wet clutch 421 through the wet clutch control valve 71, the outlet of the oil pump 32 is connected to the wet differential lock device 422 through the wet differential lock control valve 72, and the outlet of the oil pump 32 is connected to the wet parking device 423 through the wet parking control valve 73.

[0027] In some embodiments, a first relief valve 8 is connected between the inlet of the hydraulic motor 31 and the hydraulic oil tank 1. A second relief valve 9 is connected between the outlet of the oil suction pump 32 and the fluid accumulation area 41 of the gearbox 4.

[0028] Specifically, the inlet of the first relief valve 8 is connected to the inlet of the hydraulic motor 31, and the outlet of the first relief valve 8 is connected to the hydraulic oil tank 1. The first relief valve 8 is used to maintain a constant pressure at the inlet of the hydraulic motor 31. The inlet of the second relief valve 9 is connected to the outlet of the suction pump 32, and the outlet of the second relief valve 9 is connected to the fluid accumulation area 41 of the gearbox 4. The second relief valve 9 is used to maintain a constant pressure at the outlet of the suction pump 32, ensuring hydraulic safety. Moreover, the oil enters the various wet control systems 42 and the gearbox 4 through overflow and leakage points, which is more conducive to the heat dissipation and lubrication of the gearbox 4 and the wet control system 42.

[0029] In some embodiments, the hydraulic motor 31 and the oil suction pump 32 share the same housing.

[0030] Specifically, the hydraulic motor 31 and the oil suction pump 32 share a housing, that is, they are located in the same housing, which can reduce the risk of leakage at the connection point.

[0031] This invention discloses a hydraulic control power source for a transmission. High-pressure oil is generated by a high-pressure oil generating mechanism, which can deliver high-pressure oil to the transmission area via long-distance pipelines. This can replace mechanical transmission and solve the problem of long-distance, high-elevation-difference engine-transmission layouts. Furthermore, the hydraulic pipeline has better vibration resistance than universal joint driveshafts. A motor-pump integrated mechanism returns the oil accumulated at the bottom of the transmission to the transmission wet clutch control system, and then, through leakage, enters the transmission fluid accumulation area, forming a closed-loop circulation. This reduces external fluid consumption and eliminates transmission fluid accumulation caused by internal leakage in the wet clutch. In addition, this invention does not include a battery; therefore, it solves a series of problems associated with existing electric pump solutions.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic control power source for a gearbox, characterized in that, include: Hydraulic oil tank, used to store hydraulic fluid; A high-pressure oil generating mechanism is connected to the hydraulic oil tank and is used to draw oil from the hydraulic oil tank to generate high-pressure oil. The motor-pump integrated mechanism connects the high-pressure oil generating mechanism, the hydraulic oil tank, and the gearbox. It is used to generate mechanical energy under the drive of the high-pressure oil and then return the high-pressure oil to the hydraulic oil tank. Under the drive of the mechanical energy, it also draws oil from the fluid accumulation area of ​​the gearbox and delivers it to the wet control system of the gearbox.

2. The gearbox hydraulic control power source according to claim 1, characterized in that, The high-pressure oil generating mechanism includes: An engine is used to generate driving force; The main hydraulic pump, whose inlet is connected to the hydraulic oil tank and whose drive shaft is connected to the engine, is used to draw oil from the hydraulic oil tank under the drive of the engine to generate high-pressure oil.

3. The gearbox hydraulic control power source according to claim 2, characterized in that, The motor-pump integrated mechanism includes: A hydraulic motor, whose inlet is connected to the outlet of the main hydraulic pump and whose outlet is connected to the hydraulic oil tank, is used to generate rotational mechanical energy under the drive of the high-pressure oil and then transport the high-pressure oil back to the hydraulic oil tank. An oil suction pump has its inlet connected to the fluid accumulation area of ​​the gearbox and its outlet connected to the wet control system of the gearbox. Its drive shaft is connected to the hydraulic motor for generating suction under the rotation of the hydraulic motor to draw oil from the fluid accumulation area of ​​the gearbox and deliver it to the wet control system of the gearbox.

4. The gearbox hydraulic control power source according to claim 3, characterized in that, A radiator is connected in series between the outlet of the oil suction pump and the wet control system of the gearbox.

5. The gearbox hydraulic control power source according to claim 3, characterized in that, A filter is connected in series between the outlet of the oil suction pump and the wet control system of the gearbox.

6. The gearbox hydraulic control power source according to claim 3, characterized in that, A control valve group is connected in series between the outlet of the oil suction pump and the wet control system of the gearbox.

7. The gearbox hydraulic control power source according to claim 6, characterized in that, The wet control system of the transmission includes a wet clutch, a wet differential lock device, and a wet parking device. The control valve group includes a wet clutch control valve, a wet differential lock control valve, and a wet parking control valve. The outlet of the oil pump is connected to the wet clutch through the wet clutch control valve, the outlet of the oil pump is connected to the wet differential lock device through the wet differential lock control valve, and the outlet of the oil pump is connected to the wet parking device through the wet parking control valve.

8. The gearbox hydraulic control power source according to claim 3, characterized in that, A first overflow valve is connected between the inlet of the hydraulic motor and the hydraulic oil tank.

9. The gearbox hydraulic control power source according to claim 3, characterized in that, A second overflow valve is connected between the outlet of the oil suction pump and the fluid accumulation area of ​​the gearbox.

10. The gearbox hydraulic control power source according to claim 3, characterized in that, The hydraulic motor and the oil suction pump share the same housing.

Images