Efficient heat dissipation structure of harvester electro-hydraulic control gear shifting gearbox
By combining liquid cooling and air cooling, the problem of insufficient heat dissipation of the electro-hydraulic control shift gearbox of the harvester at high temperatures is solved, achieving efficient heat dissipation of the gearbox, improving shift response speed and component life, and reducing maintenance costs.
Patent Information
- Application Number
- CN202520754483.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-21
AI Technical Summary
The electro-hydraulic shift gearbox of the harvester suffers from insufficient heat dissipation at high temperatures, leading to unstable hydraulic system pressure, affecting shift response speed, reducing work efficiency, accelerating component wear, and posing safety hazards.
The heat dissipation structure combines liquid cooling and air cooling. A circulation system is formed through liquid cooling pipes and liquid cooling tanks, which, together with an exhaust fan, draws out hot air. The synergistic effect of the liquid cooling and air cooling systems achieves efficient heat dissipation of the gearbox.
Effectively controlling gearbox temperature improves shift response speed, extends component life, and reduces maintenance costs and equipment downtime.
Smart Images
Figure CN223868505U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of gearbox cooling, and in particular to a high-efficiency cooling structure for a harvester electro-hydraulic control shift gearbox. Background Technology
[0002] Electro-hydraulic shifting is an advanced shifting technology applied to harvester gearboxes. A typical electro-hydraulic shifting system consists of a controller, solenoid valve assembly, shift cylinders, and gear position sensors. The controller controls the solenoid valve assembly based on the driver's input from the control lever or gear selector button, and the actual gear position information fed back by the gear position sensor. The solenoid valve assembly controls the flow and pressure of hydraulic oil, driving the shift cylinders to engage or disengage the shift gears, thus changing gears. For example, when the driver presses a gear selector button, the controller first determines whether the current engine speed, actual gear, and control lever status meet the shifting conditions. If the conditions are met, the controller opens the corresponding solenoid valve, allowing hydraulic oil to enter the specific shift cylinder, which then drives the shifting mechanism to perform the shift operation.
[0003] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: If the electro-hydraulic control shift gearbox of the harvester is not cooled, the performance of the gearbox will be affected. The viscosity of the gearbox oil will decrease at high temperatures, leading to unstable pressure in the hydraulic system, affecting the response speed of the electro-hydraulic control shift, making shifting sluggish, reducing the working efficiency of the harvester, accelerating component wear, causing safety hazards, and reducing the service life of the oil. Utility Model Content
[0004] To address the problems mentioned in the background section, this application provides a high-efficiency heat dissipation structure for an electro-hydraulic control shift gearbox for a harvester.
[0005] This application provides a high-efficiency heat dissipation structure for an electro-hydraulic control shift gearbox of a harvester, which adopts the following technical solution: it includes a central fixed plate, a liquid cooling box is fixedly installed at the bottom of the inner side of the central fixed plate, a liquid cooling pipe is fixedly installed inside the liquid cooling box, a connector is fixedly installed at the right end of the liquid cooling pipe, a connecting pipe is fixedly inserted into the top of the connector, a liquid cooling tank is fixedly installed at the end of the connecting pipe away from the connector, a fixing ring is sleeved in the middle of the outer side of the liquid cooling tank, a support rod is fixedly installed at the bottom of the fixing ring, and the bottom of the support rod is fixedly installed on the outer side of the central fixed plate.
[0006] An exhaust pipe is fixedly inserted into the top of the central fixed plate. A diverter pipe is inserted into the inner end of the exhaust pipe. A T-connector is sleeved at the end of the diverter pipe away from the exhaust pipe. An intake pipe is connected in the middle of the T-connector. An exhaust fan is fixedly inserted into the bottom of the intake pipe. The exhaust fan is located above the liquid cooling box.
[0007] Optionally, a support block is fixedly installed at the right end of the liquid cooling pipe. The bottom of the support block is fixedly installed inside the power groove at the bottom of the middle fixed plate. The liquid cooling pipe is located below the partition plate. The partition plate is located in the middle of the upper surface of the liquid cooling box and has a round hole in the middle.
[0008] Optionally, there are two liquid cooling tanks, each consisting of a circulation pump. The two liquid cooling tanks are connected by a pipeline, and a valve is installed in the pipeline between the two liquid cooling tanks.
[0009] Optionally, a mesh plate is fixedly inserted into the middle of the central fixing plate, and a sealing plate is sleeved on the outer side of the central fixing plate. Limiting holes are provided at the edge of the sealing plate. Two identical rotating frames are fixedly installed on both sides of the center of the front of the central fixing plate, and the rotating frames are located above the liquid cooling box.
[0010] Optionally, a slotted rod is rotatably mounted in the middle of the rotating frame via a rotating rod. The slotted rod is a right-angle rod. An anti-slip layer is provided on the inner side of the vertical position of the slotted rod, and a convex plate layer is provided on the outer side of the horizontal position of the slotted rod. A sleeve is fitted on the outer side of the convex plate layer, and one end of the sleeve is fixedly mounted in the middle of the front of the central fixing plate.
[0011] Optionally, a rotating sleeve is threaded onto the outer end of the vent pipe, and a through hole is provided in the middle of the rotating sleeve. The vent pipe is located above the middle fixed plate.
[0012] In summary, this application includes the following beneficial technical effects:
[0013] 1. This utility model, by setting up components such as a liquid cooling tank, connecting pipes and liquid cooling pipes, allows the liquid inside the liquid cooling tank to flow below the gearbox through the liquid cooling pipes, and the hot air is extracted by the exhaust fan above. The liquid cooling and air cooling systems are independent of each other but work together. Air cooling can serve as an auxiliary heat dissipation method for liquid cooling. After the liquid cooling system lowers the gearbox oil temperature to a certain level, the air cooling system further cools it, so that the oil temperature can reach and be maintained within the optimal operating temperature range more quickly, thereby improving the overall heat dissipation efficiency.
[0014] 2. This utility model, by setting up components such as a slotted rod and a rotating frame, facilitates the snap-fit fixing of the central fixing plate to the side of the gearbox. It also facilitates the auxiliary fixing of the side after the heat dissipation structure is fixed to the generator, preventing the heat dissipation structure from detaching from the gearbox. At the same time, the air-cooled heat dissipation is set at the top and the liquid cooling is at the bottom, so that the air cooling extracts hot air and the liquid cooling treats the bottom of the gearbox. The two work together to provide a strong heat dissipation capacity and ensure the stable operation of the gearbox in high-temperature environments. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the front in an embodiment of this application;
[0016] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the back side in an embodiment of this application;
[0017] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the liquid cooling box in the embodiments of this application;
[0018] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the liquid cooling tank in the embodiments of this application.
[0019] Reference numerals: 1. Central fixing plate; 2. Support rod; 3. Fixing ring; 4. Slot rod; 5. Sleeve; 6. Mesh plate; 7. Rotating sleeve; 8. Exhaust pipe; 9. Inlet pipe; 10. Exhaust fan; 11. Diverter pipe; 12. Rotating frame; 13. Partition plate; 14. Connecting pipe; 15. Liquid cooling tank; 16. Valve; 17. Connecting joint; 18. Sealing plate; 19. Liquid cooling pipe; 20. Support block; 21. Liquid cooling box; 22. T-joint. Detailed Implementation
[0020] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0021] This application discloses a high-efficiency heat dissipation structure for an electro-hydraulic controlled shift gearbox in a harvester. For example... Figure 1 As shown, the device includes a central fixing plate 1, with a mesh plate 6 fixedly inserted in the center. The mesh plate 6 facilitates the exhaust of internal heat from the side. A sealing plate 18 is sleeved on the outer side of the central fixing plate 1. Limiting holes are provided at the edge of the sealing plate 18. The sealing plate 18 facilitates the tight installation of the structure and the gearbox together. Two identical rotating brackets 12 are fixedly installed on both sides of the center of the front of the central fixing plate 1. The rotating brackets 12 are located above the liquid cooling box 21. A slotted rod 4 is rotatably provided in the center of the rotating bracket 12 via a rotating rod. The groove rod 4 is designed as a right-angle rod. An anti-slip layer is provided on the inner side of the vertical position of the groove rod 4. The anti-slip layer on the inner side of the groove rod 4 increases the friction with the outer side of the gearbox. A convex plate layer is provided on the outer side of the convex plate layer. A sleeve 5 is sleeved on the outer side of the convex plate layer. The sleeve 5 is engaged with the outer side of the groove rod 4 to facilitate the fixation of the retracted groove rod 4. One end of the sleeve 5 is fixedly set in the middle of the front of the middle fixing plate 1. The groove rod 4 inside the rotating frame 12 can rotate a certain angle to pass through its own right-angle setting, which facilitates the fixation of the middle fixing plate 1 to the gearbox on one side.
[0022] Please see Figure 1 and Figure 3A liquid cooling box 21 is fixedly installed at the bottom of the inner side of the middle fixed plate 1. A liquid cooling pipe 19 is fixedly installed inside the liquid cooling box 21. A support block 20 is fixedly installed at the right end of the liquid cooling pipe 19. The bottom of the support block 20 is fixedly installed inside the power groove at the bottom of the middle fixed plate 1. The support block 20 supports the right end of the liquid cooling pipe 19 to fix the liquid cooling pipe 19 and prevent the liquid cooling pipe 19 from loosening during use. The liquid cooling pipe 19 is located below the partition plate 13. The partition plate 13 is located in the middle of the upper surface of the liquid cooling box 21. A round hole is provided in the middle of the partition plate 13. The low temperature of the liquid generated on the surface of the liquid cooling pipe 19 is dissipated into the inside of the gearbox through the round hole on the surface of the partition plate 13.
[0023] Please see Figure 1 and Figure 4 A connector 17 is fixedly installed at the right end of the liquid cooling pipe 19. A connecting pipe 14 is fixedly inserted into the top of the connector 17. A liquid cooling tank 15 is fixedly installed at the end of the connecting pipe 14 away from the connector 17. There are two liquid cooling tanks 15. The two liquid cooling tanks 15 are composed of two circulation pumps. The two liquid cooling tanks 15 are connected by a pipe. A valve 16 is installed in the middle of the pipe between the two liquid cooling tanks 15. The two liquid cooling tanks 15 form a circulation system to further reduce the temperature of the liquid that has dissipated the low temperature inside the liquid cooling pipe 19. A fixing ring 3 is sleeved on the middle of the outer side of the liquid cooling tank 15. A support rod 2 is fixedly installed at the bottom of the fixing ring 3. The bottom of the support rod 2 is fixedly installed on the outer side of the middle fixing plate 1.
[0024] Please see Figure 1 An exhaust pipe 8 is fixedly inserted into the top of the middle fixed plate 1. A rotating sleeve 7 is threaded onto the outer end of the exhaust pipe 8. A through hole is provided in the middle of the rotating sleeve 7. The exhaust pipe 8 is located above the middle fixed plate 1. The high-temperature gas inside the gearbox is discharged through the rotating sleeve 7. The detachable rotating sleeve 7 facilitates cleaning of the inside of the exhaust pipe 8. A diverter pipe 11 is inserted into the inner end of the exhaust pipe 8. A three-way pipe 22 is sleeved on the end of the diverter pipe 11 away from the exhaust pipe 8. An intake pipe 9 is connected in the middle of the three-way pipe 22. An exhaust fan 10 is fixedly inserted into the bottom of the intake pipe 9. The exhaust fan 10 is located above the liquid cooling box 21.
[0025] The implementation principle of the high-efficiency heat dissipation structure of the electro-hydraulic control shift gearbox of the present application embodiment is as follows: In use, the air inlet pipe 9 and the liquid cooling tank 21 are inserted into the housing of the gearbox. The middle fixing plate 1 serves as one side cover of the gearbox housing. The exhaust fan 10 draws hot air from the inner wall of the gearbox into the air inlet pipe 9, through the three-way pipe 22 into the split pipe 11 and the exhaust pipe 8, and then out through the exhaust pipe 8. Due to the large amount of heat inside the gearbox, the liquid cooling tank 15 is activated to draw the low-temperature liquid inside into the liquid cooling pipe 19 through the connecting pipe 14. After circulating once inside the liquid cooling pipe 19, the liquid flows into the end of the liquid cooling tank 15. Under the circulation of the two liquid cooling tanks 15, the hot liquid entering the interior is cooled and discharged, forming a circulation. The liquid cooling below cools the bottom of the gearbox. Through the combination of the two heat dissipation methods, the temperature of the gearbox can be controlled more effectively, reducing the damage of high temperature to the gears, bearings, seals and other components inside the gearbox, extending the service life of these components, and reducing maintenance costs and equipment downtime.
[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-efficiency heat dissipation structure for an electro-hydraulic control shift gearbox of a harvester, comprising a central fixing plate (1), characterized in that: A liquid cooling box (21) is fixedly installed at the bottom of the inner side of the middle fixing plate (1). A liquid cooling pipe (19) is fixedly installed inside the liquid cooling box (21). A connector (17) is fixedly installed at the right end of the liquid cooling pipe (19). A connecting pipe (14) is fixedly inserted into the top of the connector (17). A liquid cooling tank (15) is fixedly installed at the end of the connecting pipe (14) away from the connector (17). A fixing ring (3) is sleeved in the middle of the outer side of the liquid cooling tank (15). A support rod (2) is fixedly installed at the bottom of the fixing ring (3). The bottom of the support rod (2) is fixedly installed on the outer side of the middle fixing plate (1). An exhaust pipe (8) is fixedly inserted into the top of the middle fixed plate (1). A diverter pipe (11) is inserted into the inner end of the exhaust pipe (8). A three-way pipe (22) is sleeved on the end of the diverter pipe (11) away from the exhaust pipe. An intake pipe (9) is connected in the middle of the three-way pipe (22). An exhaust fan (10) is fixedly inserted into the bottom of the intake pipe (9). The exhaust fan (10) is located above the liquid cooling box (21).
2. The high-efficiency heat dissipation structure for an electro-hydraulic control shift gearbox of a harvester according to claim 1, characterized in that: A support block (20) is fixedly installed at the right end of the liquid cooling pipe (19). The bottom of the support block (20) is fixedly installed inside the power groove at the bottom of the middle fixing plate (1). The liquid cooling pipe (19) is located below the partition plate (13). The partition plate (13) is located in the middle of the upper surface of the liquid cooling box (21). A round hole is provided in the middle of the partition plate (13).
3. The high-efficiency heat dissipation structure of the electro-hydraulic control shift gearbox for a harvester according to claim 1, characterized in that: The number of liquid cooling tanks (15) is two, and the two liquid cooling tanks (15) are composed of two circulation pumps. The two liquid cooling tanks (15) are connected by a pipeline, and a valve (16) is installed in the pipeline in the middle of the two liquid cooling tanks (15).
4. The high-efficiency heat dissipation structure of the electro-hydraulic control shift gearbox for a harvester according to claim 1, characterized in that: A mesh plate (6) is fixedly inserted into the middle of the middle fixing plate (1), and a sealing plate (18) is sleeved on the outside of the middle fixing plate (1). Limiting holes are provided at the edge of the sealing plate (18). Two identical rotating frames (12) are fixedly installed on both sides of the middle front of the middle fixing plate (1). The rotating frames (12) are located above the liquid cooling box (21).
5. The high-efficiency heat dissipation structure of the electro-hydraulic control shift gearbox for a harvester according to claim 4, characterized in that: The rotating frame (12) has a slotted rod (4) rotatably mounted in the middle via a rotating rod. The slotted rod (4) is a right-angle rod. An anti-slip layer is provided on the inner side of the vertical position of the slotted rod (4), and a convex plate layer is provided on the outer side of the horizontal position of the slotted rod (4). A sleeve (5) is sleeved on the outer side of the convex plate layer. One end of the sleeve (5) is fixedly mounted in the middle of the front of the central fixing plate (1).
6. The high-efficiency heat dissipation structure of the electro-hydraulic control shift gearbox for a harvester according to claim 1, characterized in that: The outer end of the vent pipe (8) is threaded with a rotating sleeve (7), and a through hole is provided in the middle of the rotating sleeve (7). The vent pipe (8) is located above the middle fixing plate (1).