Power output assembly of agricultural engine

Abstract

The power output assembly of the agricultural engine comprises a diesel engine, a hydraulic valve mechanism is connected to the end of a rotating shaft of the diesel engine, an oil inlet mechanism is connected to one side of the hydraulic valve mechanism, a first hydraulic cavity is formed in the side, close to a clutch mechanism, of the hydraulic valve mechanism, and a second hydraulic cavity is formed in the hydraulic valve mechanism; a piston mechanism is arranged in the first hydraulic cavity, and the oil inlet mechanism enables external hydraulic oil to flow into the first hydraulic cavity through an oil way in the hydraulic valve mechanism so as to push the piston mechanism to be combined with the clutch mechanism. A plurality of oil pressure adjusting assemblies used for releasing pressure of hydraulic oil in the first hydraulic cavity and enabling the hydraulic oil to flow into the second hydraulic cavity are further arranged in the hydraulic valve mechanism. The hydraulic valve mechanism enables hydraulic oil to flow into the first hydraulic cavity to push the piston body, so that connection and separation with the clutch are controlled, and the whole oil inlet process is reliable and controllable.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more specifically to a power output assembly for an agricultural engine. Background Technology

[0002] In agricultural and forestry machinery, the connection between the hydraulic clutch and the engine is extremely important. Located between the engine and the transmission system, the hydraulic clutch's primary function is to control the transmission and disconnection of power. When the machine starts or needs to shift gears, the hydraulic clutch uses hydraulic oil pressure to achieve a smooth power engagement, avoiding a direct, rigid connection between the engine and the transmission system, thus reducing shock and vibration. This smooth power transmission not only protects the engine and transmission components, extending their service life, but also improves the machine's operating efficiency and work quality. Simultaneously, the hydraulic clutch's rapid response capability allows the engine to flexibly adjust its power output under different operating conditions, ensuring that agricultural and forestry machinery maintains a highly efficient and stable operating state even in complex working environments. In short, the coordinated work of the hydraulic clutch and the engine is a key element in achieving efficient and reliable operation of agricultural and forestry machinery.

[0003] Authorization announcement number CN106678309B discloses a power output device for agricultural machinery. According to its specification and drawings, the power output to the working system is achieved through a power control mechanism. The oil chamber pushes the plunger through the action of oil pressure. The plunger compresses the disc spring, causing the steel plate to engage with the friction plate. The power is then transmitted to the friction plate through friction. The friction plate transmits the power to the clutch housing through spline engagement, and the power is output to the output shaft through the clutch housing. In this process, the transmitted torque can be increased by increasing the number of friction plates.

[0004] However, the solution still has the following drawbacks: 1. The hydraulic circuit control for pushing the plunger is inaccurate. How to ensure the hydraulic stability and pressure relief stability of the circuit is one of the issues that needs to be considered; 2. For the hydraulic circuit controlling the plunger, due to the harsh and complex working environment in agriculture, how to prevent accidental activation of the hydraulic circuit is also one of the issues that needs to be considered; 3. How to achieve efficient power output of the engine using the clutch is also one of the issues that the output assembly needs to consider. Summary of the Invention

[0005] This invention addresses the problems existing in the power output of the aforementioned engines by proposing a power output assembly for an agricultural engine. The pressure valve mechanism drives the outer rotor to rotate through the inner rotor, thereby changing the gap between the inner and outer rotors. This causes hydraulic oil to flow into the interior of the first hydraulic chamber, pushing the piston body and controlling the engagement and disengagement of the clutch. Through reasonable oil return circuit design and pressure relief valve rod adjustment, smooth pressure relief can be achieved.

[0006] The objective of this invention is achieved through the following technical solution: a power output assembly for an agricultural engine, comprising a diesel engine, wherein a hydraulic valve mechanism is connected to the end of the rotating shaft of the diesel engine, an oil inlet mechanism is connected to one side of the hydraulic valve mechanism, a first hydraulic chamber is provided on the side of the hydraulic valve mechanism near the clutch mechanism and a second hydraulic chamber is provided inside the first hydraulic chamber, a piston mechanism is provided inside the first hydraulic chamber, and the oil inlet mechanism draws external hydraulic oil into the first hydraulic chamber through the oil passage inside the hydraulic valve mechanism, thereby pushing the piston mechanism to engage with the clutch mechanism, and the hydraulic valve mechanism is further provided with a plurality of oil pressure regulating components for depressurizing the hydraulic oil inside the first hydraulic chamber and flowing into the second hydraulic chamber.

[0007] Preferably, the hydraulic valve mechanism includes a first hydraulic valve body and a second hydraulic valve body. The second hydraulic valve body is sealed and connected to one side of the first hydraulic valve body. The surface of the first hydraulic valve body is provided with a first oil inlet channel and a first oil outlet channel. The first oil inlet channel is connected to an oil inlet mechanism, and the first oil outlet channel is connected to the inside of a first hydraulic chamber. A guide shell is provided on the surface of the first oil inlet channel and the first oil outlet channel. A guide rotor is provided inside the guide shell. A first driven gear is provided inside the first hydraulic valve body and is driven and connected to the diesel engine shaft. The first driven gear is connected to the guide rotor through a vertical shaft. The top of the guide rotor and the inside of the guide shell have several first gaps. The hydraulic oil flowing out of the first oil inlet channel flows into the inside of the guide rotor through the first gaps. When the guide rotor rotates, it transmits the hydraulic oil to the inside of the first oil outlet channel.

[0008] Preferably, the oil inlet mechanism includes an oil pump and a pump body connector. An oil filter element is installed inside the oil pump. The pump body connector is connected to the end of the oil pump. The pump body connector has a second oil inlet channel and a first pressure relief channel inside. The second oil inlet channel is connected to the first oil inlet channel. The side wall of the first hydraulic valve body has a first pressure relief port. The first pressure relief port is connected to the first pressure relief channel and its end is connected to a first sealing plug.

[0009] Preferably, the piston mechanism includes a piston body, a retaining ring, and a first rubber ring. The piston body has annular grooves on its outer and inner sides. Each annular groove has a first rubber ring and a retaining ring arranged in sequence inside it. The outer sides of the piston body and the retaining ring are attached to the inner wall of the first hydraulic chamber.

[0010] Preferably, the oil pressure regulating assembly includes a pressure relief valve stem and a first valve stem through hole. The first hydraulic chamber is provided with a plurality of second oil outlet channels. The side wall of the first hydraulic valve body is provided with a plurality of rotatable pressure relief valve stems. The top of the pressure relief valve stem is hollow and the side of the hollow area is provided with a first valve stem through hole. When the pressure relief valve stem rotates, it can make the first valve stem through hole and the second oil outlet channel open or blocked. The pressure relief valve stem passes through the side wall of the first hydraulic valve body to the interior of the second hydraulic chamber. The side wall of the first hydraulic valve body is also provided with a plurality of second pressure relief channels. Each second pressure relief channel is connected to a second oil outlet channel and the end of the second pressure relief channel is provided with a second sealing plug.

[0011] Preferably, the surface of the first hydraulic valve body is further provided with a torsion spring support plate, the end of which is connected to one end of a metal torsion spring, and the other end of which is connected to the top of the pressure relief valve stem.

[0012] Preferably, the pressure relief valve stem is further provided with a valve stem adjusting arm on the side near the outside, and the rotation of the valve stem adjusting arm can drive the pressure relief valve stem to rotate.

[0013] Preferably, the inner surface of the first hydraulic chamber is further provided with a third pressure relief channel facing the inside of the second hydraulic chamber. The inside of the third pressure relief channel is further provided with an overpressure protection component. When the pressure inside the first hydraulic chamber exceeds the set pressure, the overpressure protection component can discharge hydraulic pressure into the second hydraulic chamber.

[0014] Preferably, the overpressure protection assembly includes a first pressure relief column, a second pressure relief column, a vertical shaft valve core, and a metal spring. The first pressure relief column is inserted into the third pressure relief channel. The first pressure relief column is hollow and has the second pressure relief column and the vertical shaft valve core slidably connected inside. The area of ​​the vertical shaft valve core that fits with the third pressure relief channel is hollow, and the side wall of the vertical shaft valve core is provided with a third oil outlet channel. The second pressure relief column is also provided with a metal spring inside. One end of the metal spring fits into the second pressure relief column, and the other end fits into the inside of the second hydraulic valve body.

[0015] By setting the vertical shaft valve core to slide on the first pressure relief column to control the position of the third oil outlet channel, the pressure relief can be effectively achieved when the hydraulic oil pressure on the vertical shaft valve core is greater than the force of the metal spring.

[0016] Preferably, the clutch mechanism includes a clutch valve body, clutch plates, disc springs, and a thrust bearing. Several clutch plates and disc springs are stacked inside the clutch valve body. When the disc springs are not compressed, the clutch plates can rotate relative to each other. A thrust bearing is provided between the clutch plates and the piston body.

[0017] By incorporating a thrust bearing, when the clutch mechanism is not engaged, the thrust bearing prevents direct contact between the piston body and the clutch disc. The thrust bearing can withstand loads along the axial direction, reducing the friction between the piston body and the clutch disc under axial force.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The hydraulic valve mechanism drives the outer rotor to rotate through the inner rotor, thereby changing the gap position between the inner and outer rotors. This causes the hydraulic oil to flow through the first oil inlet channel and the first oil outlet channel into the interior of the first hydraulic chamber, pushing the piston body and thus controlling the engagement and disengagement of the clutch. The entire oil inlet process is reliable and controllable.

[0019] The pressure relief process of the hydraulic valve mechanism is also very stable. Through reasonable return oil circuit design and pressure relief valve rod adjustment, smooth pressure relief can be achieved, avoiding incomplete clutch disengagement or instantaneous impact caused by sudden pressure drop.

[0020] It can automatically adjust the engagement degree of the piston mechanism and clutch mechanism according to the output power of the diesel engine and the working requirements of the agricultural machine, so as to achieve efficient power transmission. The hydraulic valve mechanism can adjust the pressure of the hydraulic oil to keep the clutch mechanism at the optimal friction under different speeds and loads, thereby improving the efficiency of power transmission and reducing energy loss.

[0021] It has an overload protection function. When the first hydraulic chamber encounters an overload, the overpressure protection component can release the pressure inside the first hydraulic chamber, thus preventing damage to the hydraulic valve mechanism and clutch mechanism.

[0022] To disconnect the clutch mechanism, the hydraulic oil inside the first hydraulic chamber needs to be depressurized. This causes the clutch mechanism to exert a reverse thrust on the piston body, causing the piston body to slide to the left and reset. In this solution, there are two pressure relief valve rods. Therefore, to prevent accidental activation, both pressure relief valve rods need to be rotated to the pressure relief state simultaneously, effectively reducing accidental activation during farming. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the diesel engine after it has been removed from the present invention. Figure 3 This is an exploded view of the clutch mechanism of the present invention after it has been removed from the hydraulic valve mechanism; Figure 4 This is an exploded view of the present invention after the flow guide housing, the first driven gear, and the flow guide rotor have been removed. Figure 5 This is a partial cross-sectional view of the oil passage layout of the present invention; Figure 6 This is a partial cross-sectional view of the oil passage layout of the present invention; Figure 7 This is a partial cross-sectional view of the oil passage layout of the present invention; Figure 8 This is a cross-sectional view of the hydraulic valve mechanism region of the present invention; Figure 9 This is a partial perspective view of the present invention.

[0024] In the diagram, the markings are as follows: 1. Diesel engine; 2. Hydraulic valve mechanism; 20. First clearance; 21. First hydraulic chamber; 22. Second hydraulic chamber; 23. First hydraulic valve body; 24. Second hydraulic valve body; 25. First oil inlet channel; 26. First oil outlet channel; 27. Guide housing; 28. First driven gear; 29. ​​Guide rotor; 211. Second oil outlet channel; 212. Third pressure relief channel; 231. First pressure relief port; 232. Second pressure relief channel; 3. Oil inlet mechanism; 31. Oil pump; 32. Pump body connector; 33. Second oil inlet channel; 34. First pressure relief port. 35. First sealing plug; 4. Clutch mechanism; 41. Clutch valve body; 42. Clutch plate; 43. Disc spring; 44. Thrust bearing; 5. Piston mechanism; 51. Piston body; 52. Limiting ring; 53. First rubber ring; 54. Annular groove; 6. Oil pressure regulating assembly; 61. Pressure relief valve stem; 62. First valve stem through hole; 63. Second sealing plug; 64. Torsion spring support plate; 65. Metal torsion spring; 66. Valve stem adjusting arm; 7. Overpressure protection assembly; 71. First pressure relief column; 72. Second pressure relief column; 73. Vertical shaft valve core; 74. Metal spring. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments illustrated in the accompanying drawings: like Figures 1 to 3 As shown, a power output assembly for an agricultural engine includes a diesel engine 1. The end of the shaft of the diesel engine 1 is connected to a hydraulic valve mechanism 2. One side of the hydraulic valve mechanism 2 is connected to an oil inlet mechanism 3. The hydraulic valve mechanism 2 has a first hydraulic chamber 21 on the side near the clutch mechanism 4 and a second hydraulic chamber 22 inside it. The first hydraulic chamber 21 has a piston mechanism 5 inside it.

[0026] Please continue to refer to this. Figures 4 to 5As shown, the hydraulic valve mechanism 2 includes a first hydraulic valve body 23 and a second hydraulic valve body 24. The second hydraulic valve body 24 is sealed and connected to one side of the first hydraulic valve body 23. The surface of the first hydraulic valve body 23 is provided with a first oil inlet channel 25 and a first oil outlet channel 26. The first oil inlet channel 25 is connected to the oil inlet mechanism 3, and the first oil outlet channel 26 is connected to the inside of the first hydraulic chamber 21. A guide housing 27 is provided on the surface of the first oil inlet channel 25 and the first oil outlet channel 26. A guide rotor 29 is provided inside the guide housing 27. The first driven gear 28 is provided inside the first hydraulic valve body 23 and is driven and connected to the shaft of the diesel engine 1. The first driven gear 28 is connected to the guide rotor 29 through a vertical shaft. The top of the guide rotor 29 and the inside of the guide housing 27 have several first gaps 20. The hydraulic oil flowing out of the first oil inlet channel 25 flows into the inside of the guide rotor 29 through the first gaps 20. When the guide rotor 29 rotates, it transmits the hydraulic oil to the inside of the first oil outlet channel 26.

[0027] There is almost no gap between the maximum outer diameter of the guide rotor 29 and the inner diameter of the guide housing 27. When the first driven gear 28 is not rotating, the guide rotor 29 located inside the guide housing 27 will not rotate, and the hydraulic oil delivered by the oil inlet mechanism 3 will remain inside the first gap 20. The guide rotor 29 is composed of two parts, an inner rotor and an outer rotor, which are not aligned. There is a certain gap between the outer diameter of the inner rotor and the inner diameter of the outer rotor. When the inner rotor rotates with the rotation of the first driven gear 28, the position of this gap will change. Therefore, when the guide rotor 29 is not rotating, its bottom blocks the hydraulic oil inside the first gap 20 from entering the first oil outlet channel 26 through the guide housing 27 via the first oil inlet channel 25.

[0028] When the shaft of the diesel engine 1 rotates, it drives the first driven gear 28 to rotate, which in turn drives the inner rotor inside the vertical shaft and the guide rotor 29 to rotate. At this time, the inner rotor drives the outer rotor to rotate, thereby changing the gap position between the inner and outer rotors. The hydraulic oil inside the first gap 20 flows into the gap between the inner and outer rotors and flows into the first oil outlet channel 26 as the guide rotor 29 rotates. The hydraulic oil in the first oil outlet channel 26 flows into the first hydraulic chamber 21 and pushes the piston mechanism 5 to move.

[0029] Please continue to refer to this. Figures 6 to 7As shown, the oil inlet mechanism 3 includes an oil pump 31 and a pump body connector 32. An oil filter is installed inside the oil pump 31. The pump body connector 32 is connected to the end of the oil pump 31. The pump body connector 32 has a second oil inlet channel 33 and a first pressure relief channel 34 inside. The second oil inlet channel 33 communicates with the first oil inlet channel 25. A first pressure relief port 231 is provided on the side wall of the first hydraulic valve body 23. The first pressure relief port 231 communicates with the first pressure relief channel 34 and has a first sealing plug 35 connected to its end. The oil inlet mechanism 3 draws external hydraulic oil into the interior of the first hydraulic chamber 21 through the oil inlet channel, thereby driving the piston mechanism 5 to engage with the clutch mechanism 4.

[0030] An external oil tank is connected to the inlet of the oil pump 31. When the piston mechanism 5 needs to engage with the clutch mechanism 4, the oil filter first filters the hydraulic oil, and then the hydraulic oil flows into both the second inlet channel 33 and the first pressure relief channel 34. However, the end of the first pressure relief port 231, which connects to the first pressure relief channel 34, is fitted with a first sealing plug 35, so the hydraulic oil stops flowing once this oil passage is full. Since the second inlet channel 33 is connected to the first inlet channel 25, the hydraulic oil can flow normally into the first inlet channel 25. The hydraulic oil flowing out of the first inlet channel 25 first stays in the first gap 20, and then flows into the first outlet channel 26 as the guide rotor 29 rotates.

[0031] Please continue to refer to this. Figure 8 As shown, in this embodiment, the piston mechanism 5 includes a piston body 51, a limiting ring 52, and a first rubber ring 53. The piston body 51 has annular grooves 54 on its outer and inner sides. Each annular groove 54 has a first rubber ring 53 and a limiting ring 52 arranged in sequence inside it. The outer sides of the piston body 51 and the limiting ring 52 are attached to the inner wall of the first hydraulic chamber 21.

[0032] With this design, the inner wall of the first hydraulic chamber 21 compresses the limiting ring 52, causing the first rubber ring 53 to deform and achieving a sealing effect. The gap between the inner wall of the first hydraulic chamber 21 and the outer diameter of the piston body 51 is sealed. As the first hydraulic chamber 21 continuously fills with hydraulic oil, this hydraulic oil pushes the piston body 51 to slide to the right.

[0033] In this embodiment, the hydraulic valve mechanism 2 is further provided with several oil pressure regulating components 6 for depressurizing the hydraulic oil inside the first hydraulic chamber 21 and allowing it to flow into the second hydraulic chamber 22.

[0034] Please refer to Figures 4 to 9As shown, the oil pressure regulating assembly 6 includes a pressure relief valve stem 61 and a first valve stem through hole 62. The first hydraulic chamber 21 is provided with a plurality of second oil outlet channels 211. The side wall of the first hydraulic valve body 23 is provided with a plurality of rotatable pressure relief valve stems 61. The top of the pressure relief valve stem 61 is hollow and the side of the hollow area is provided with a first valve stem through hole 62. When the pressure relief valve stem 61 rotates, it can make the first valve stem through hole 62 and the second oil outlet channel 211 open or blocked. The pressure relief valve stem 61 passes through the side wall of the first hydraulic valve body 23 to the interior of the second hydraulic chamber 22. The side wall of the first hydraulic valve body 23 is also provided with a plurality of second pressure relief channels 232. Each second pressure relief channel 232 is connected to the second oil outlet channel 211 and the end of the second pressure relief channel 232 is provided with a second sealing plug 63.

[0035] The first hydraulic chamber 21 is also provided with a through hole that communicates with the second pressure relief channel 232. Under normal circumstances, the oil passage connected to the second pressure relief channel 232 is always in a closed state. This setting ensures that when the pressure relief valve stem 61 cannot be rotated and is stuck, the hydraulic oil in the second pressure relief channel 232 can be discharged to the outside after the second sealing plug 63 is removed.

[0036] The hydraulic oil inside the first hydraulic chamber 21 is mainly used to support the piston body 51 to fit tightly against the clutch mechanism 4. If it is necessary to disconnect from the clutch mechanism 4, the hydraulic oil inside the first hydraulic chamber 21 needs to be depressurized, so that the clutch mechanism 4 generates a reverse thrust on the piston body 51, causing the piston body 51 to slide to the left and reset.

[0037] Furthermore, there are two pressure relief valve stems 61 in this design. Therefore, in order to prevent accidental activation, both pressure relief valve stems 61 need to be in the pressure relief state to effectively prevent accidental activation during the farming process.

[0038] Rotating the pressure relief valve stem 61 aligns the first valve stem through-hole 62 with the bottom of the second oil outlet channel 211. Hydraulic oil inside the first hydraulic chamber 21 flows into the first valve stem through-hole 62 through the second oil outlet channel 211. Hydraulic oil passing through the first valve stem through-hole 62 is discharged through the top of the pressure relief valve stem 61 into the second hydraulic chamber 22. When the first valve stem through-holes 62 of both pressure relief valve stems 61 are connected to the bottoms of both second oil outlet channels 211, pressure relief of the first hydraulic chamber 21 is achieved.

[0039] The surface of the first hydraulic valve body 23 is also provided with a torsion spring support plate 64. One end of the torsion spring support plate 64 is connected to one end of a metal torsion spring 65, and the other end of the metal torsion spring 65 is connected to the top of the pressure relief valve stem 61. The pressure relief valve stem 61 is also provided with a valve stem adjusting arm 66 on the side near the outside. The rotation of the valve stem adjusting arm 66 can drive the pressure relief valve stem 61 to rotate.

[0040] The bottom of the valve stem adjusting arm 66 is located outside the entire hydraulic valve mechanism 2. Rotating the valve stem adjusting arm 66 allows the pressure relief valve stem 61 to rotate. The valve stem adjusting arm 66 should have a locking function, which can be achieved using a snap-fit ​​or snap ring. When the valve stem adjusting arm 66 releases its self-locking function, the metal torsion spring 65 is used to reset the pressure relief valve stem 61.

[0041] In this embodiment, the inner surface of the first hydraulic chamber 21 is also provided with a third pressure relief channel 212 facing the inside of the second hydraulic chamber 22. The inside of the third pressure relief channel 212 is also provided with an overpressure protection component 7. When the pressure inside the first hydraulic chamber 21 exceeds the set pressure, the overpressure protection component 7 can discharge the hydraulic pressure into the second hydraulic chamber 22.

[0042] The overpressure protection assembly 7 includes a first pressure relief column 71, a second pressure relief column 72, a vertical shaft valve core 73, and a metal spring 74. The first pressure relief column 71 is inserted into the third pressure relief channel 212. The first pressure relief column 71 is hollow and the second pressure relief column 72 and the vertical shaft valve core 73 are slidably connected inside it. The area of ​​the vertical shaft valve core 73 that is in contact with the third pressure relief channel 212 is hollow, and the side wall of the vertical shaft valve core 73 is provided with a third oil outlet channel 731. The second pressure relief column 72 is also provided with a metal spring 74 inside it. One end of the metal spring 74 is attached to the second pressure relief column 72, and the other end is attached to the inside of the second hydraulic valve body 24.

[0043] Hydraulic oil inside the first hydraulic chamber 21 flows into the interior of the vertical shaft valve core 73 through the third pressure relief channel 212. When the hydraulic oil pressure inside the first hydraulic chamber 21 is normal, the metal spring 74 presses against the vertical shaft valve core 73, causing the third oil outlet channel 731 on the vertical shaft valve core 73 to be in a blocked state against the top inner wall of the first pressure relief column 71.

[0044] When the hydraulic oil level inside the first hydraulic chamber 21 is too high, the pressure of the hydraulic oil on the vertical shaft valve core 73 will increase, causing the vertical shaft valve core 73 to slide to the left. The third oil outlet channel 731 will gradually separate from the top inner wall of the first pressure relief column 71. The hydraulic oil inside the first hydraulic chamber 21 will flow into the second hydraulic chamber 22 through the third pressure relief channel 212 and the third oil outlet channel 731 in sequence, thereby completing the pressure relief.

[0045] In this embodiment, the clutch mechanism 4 includes a clutch valve body 41, a clutch plate 42, a disc spring 43, and a thrust bearing 44. The clutch valve body 41 has a plurality of clutch plates 42 and disc springs 43 stacked inside. When the disc springs 43 are not compressed, the clutch plates 42 can rotate relative to each other. The thrust bearing 44 is provided between the clutch plates 42 and the piston body 51.

[0046] When the piston body 51 is not pushed by the hydraulic oil inside the first hydraulic chamber 21, the leftmost clutch plate 42 is pushed to the left by the disc spring 43. The force generated by the clutch plate 42 is transmitted to the right side of the thrust bearing 44, and then the left side of the thrust bearing 44 transmits the force to the end of the piston body 51. The piston body 51 slides to the left after being subjected to the force. At this time, when the disc spring 43 is not compressed, the clutch plates 42 can rotate relative to each other, and the entire clutch mechanism 4 is in an unengaged state.

[0047] Working principle and usage of this invention: An external oil tank is connected to the oil inlet of the oil pump 31. When the piston mechanism 5 needs to engage with the clutch mechanism 4, the oil filter first filters the hydraulic oil, and then the hydraulic oil flows simultaneously into the second oil inlet channel 33 and the first pressure relief channel 34. Since the second oil inlet channel 33 is connected to the first oil inlet channel 25, the hydraulic oil can flow normally into the first oil inlet channel 25. The hydraulic oil flowing out of the first oil inlet channel 25 first stays in the first gap 20.

[0048] When the shaft of the diesel engine 1 rotates, it drives the first driven gear 28 to rotate, which in turn drives the inner rotor inside the vertical shaft and the guide rotor 29 to rotate. At this time, the inner rotor drives the outer rotor to rotate, thereby changing the gap position between the inner and outer rotors. The hydraulic oil inside the first gap 20 flows into the gap between the inner and outer rotors and flows into the first oil outlet channel 26 as the guide rotor 29 rotates. As the first hydraulic chamber 21 is continuously filled with hydraulic oil, this hydraulic oil pushes the piston body 51 to slide to the right.

[0049] The piston body 51 transmits force to the thrust bearing 44, clutch plate 42 and disc spring 43 in sequence to the right. Then, the disc spring 43 deforms after being compressed, so that each clutch plate 42 fits together, and the power of the diesel engine 1 shaft can be smoothly transmitted to the output shaft at the right end of the clutch mechanism 4.

[0050] If it is necessary for the piston body 51 to be separated from the clutch mechanism 4, rotating the pressure relief valve stem 61 will align the first valve stem through-hole 62 with the bottom of the second oil outlet channel 211. Hydraulic oil inside the first hydraulic chamber 21 flows into the first valve stem through-hole 62 through the second oil outlet channel 211. Hydraulic oil passing through the first valve stem through-hole 62 is discharged through the top of the pressure relief valve stem 61 into the second hydraulic chamber 22. When the first valve stem through-holes 62 of both pressure relief valve stems 61 are connected to the bottoms of both second oil outlet channels 211, pressure relief of the first hydraulic chamber 21 is completed. This causes the clutch plate 42 inside the clutch mechanism 4 to exert a reverse thrust on the piston body 51, causing the piston body 51 to slide to the left and reset.

[0051] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A power output assembly of an agricultural engine, comprising a diesel engine (1), characterized in that: The end of the rotating shaft of the diesel engine (1) is connected to a hydraulic valve mechanism (2), one side of the hydraulic valve mechanism (2) is connected to an oil inlet mechanism (3), a first hydraulic chamber (21) is provided on the side of the hydraulic valve mechanism (2) close to the clutch mechanism (4), and a second hydraulic chamber (22) is provided inside the first hydraulic chamber (21), a piston mechanism (5) is provided inside the first hydraulic chamber (21), the oil inlet mechanism (3) allows external hydraulic oil to flow into the first hydraulic chamber (21) through the oil path inside the hydraulic valve mechanism (2), thereby pushing the piston mechanism (5) to combine with the clutch mechanism (4), and a plurality of oil pressure regulating components (6) are also provided inside the hydraulic valve mechanism (2) for relieving the hydraulic oil inside the first hydraulic chamber (21) and allowing the hydraulic oil to flow into the second hydraulic chamber (22).

2. The power output assembly of the agricultural engine according to claim 1, characterized in that: The hydraulic valve mechanism (2) comprises a first hydraulic valve body (23) and a second hydraulic valve body (24); the second hydraulic valve body (24) is sealingly connected to one side of the first hydraulic valve body (23); a first oil inlet channel (25) and a first oil outlet channel (26) are provided on the surface of the first hydraulic valve body (23); the first oil inlet channel (25) is connected to the oil inlet mechanism (3); the first oil outlet channel (26) is connected to the inside of the first hydraulic chamber (21); a flow guide housing (27) is provided on the surface cover of the first oil inlet channel (25) and the first oil outlet channel (26); the flow guide housing (27) ) is provided with a guide rotor (29) inside, the first hydraulic valve body (23) is provided with a first driven gear (28) drivingly connected to the rotating shaft of the diesel engine (1), the first driven gear (28) is connected to the guide rotor (29) through a vertical shaft, a plurality of first gaps (20) are provided between the top of the guide rotor (29) and the inside of the guide housing (27), the hydraulic oil flowing out of the first oil inlet channel (25) flows into the inside of the guide rotor (29) through the first gaps (20), and the guide rotor (29) transfers the hydraulic oil to the inside of the first oil outlet channel (26) when rotating.

3. The power output assembly of the agricultural engine according to claim 2, characterized in that: The oil inlet mechanism (3) comprises an oil pump (31) and a pump body joint (32); an oil filter element is installed inside the oil pump (31); an end of the oil pump (31) is connected to the pump body joint (32); a second oil inlet passage (33) and a first pressure relief passage (34) are provided inside the pump body joint (32); the second oil inlet passage (33) is connected to the first oil inlet passage (25); a first pressure relief port (231) is provided on a side wall of the first hydraulic valve body (23); the first pressure relief port (231) is connected to the first pressure relief passage (34) and a first sealing plug (35) is connected to the end thereof.

4. The power output assembly of the agricultural engine according to claim 2, characterized in that: The piston mechanism (5) comprises a piston body (51), a limiting snap ring (52) and a first rubber ring (53); an annular groove (54) is provided on the outer side and the inner side of the piston body (51); the first rubber ring (53) and the limiting snap ring (52) are provided in sequence inside each of the annular grooves (54); the outer sides of the piston body (51) and the limiting snap ring (52) are in contact with the inner wall of the first hydraulic chamber (21).

5. The power output assembly of the agricultural engine according to claim 4, characterized in that: The oil pressure regulating assembly (6) comprises a pressure relief valve stem (61) and a first valve stem through hole (62); a plurality of second oil outlet channels (211) are provided in the first hydraulic chamber (21); a plurality of rotatable pressure relief valve stems (61) are provided inside the side wall of the first hydraulic valve body (23); the top of the pressure relief valve stem (61) is hollow and a first valve stem through hole (62) is provided on the side surrounding the hollow area; when the pressure relief valve stem (61) is rotated, the first valve stem through hole (62) and the second oil outlet channel (211) can be connected or blocked; the pressure relief valve stem (61) passes through the side wall of the first hydraulic valve body (23) to the inside of the second hydraulic chamber (22); a plurality of second pressure relief channels (232) are provided inside the side wall of the first hydraulic valve body (23); each of the second pressure relief channels (232) is connected to the second oil outlet channel (211) and a second sealing plug (63) is provided at the end of the second pressure relief channel (232).

6. The power output assembly of the agricultural engine according to claim 5, characterized in that: A torsion spring support plate (64) is also provided on the surface of the first hydraulic valve body (23), the end of the torsion spring support plate (64) is connected to one end of a metal torsion spring (65), and the other end of the metal torsion spring (65) is connected to the top of the pressure relief valve stem (61).

7. The power output assembly of the agricultural engine according to claim 5, characterized in that: A valve stem adjusting arm (66) is also provided on a side of the pressure relief valve stem (61) close to the outside, and the rotation of the valve stem adjusting arm (66) can drive the pressure relief valve stem (61) to rotate.

8. The power output assembly of the agricultural engine according to claim 6, characterized in that: The inner surface of the first hydraulic chamber (21) is also provided with a third pressure relief channel (212) facing the inside of the second hydraulic chamber (22); an overpressure protection component (7) is also provided inside the third pressure relief channel (212); when the inside of the first hydraulic chamber (21) exceeds a set pressure, the overpressure protection component (7) can discharge the hydraulic pressure into the inside of the second hydraulic chamber (22).

9. The power output assembly of the agricultural engine according to claim 8, characterized in that: The overpressure protection assembly (7) comprises a first pressure relief column (71), a second pressure relief column (72), a vertical shaft valve core (73) and a metal spring (74); the first pressure relief column (71) is stuck inside the third pressure relief channel (212); the first pressure relief column (71) is hollow and the second pressure relief column (72) and the vertical shaft valve core (73) are slidably connected inside; the area of ​​the vertical shaft valve core (73) that is in contact with the third pressure relief channel (212) is hollow and a third oil outlet channel (731) is provided on the side wall of the vertical shaft valve core (73); the second pressure relief column (72) is also provided with a metal spring (74); one end of the metal spring (74) is in contact with the second pressure relief column (72) and the other end is in contact with the inside of the second hydraulic valve body (24).

10. The power output assembly of the agricultural engine according to claim 9, characterized in that: The clutch mechanism (4) comprises a clutch valve body (41), a clutch plate (42), a disc spring (43) and a thrust bearing (44); a plurality of clutch plates (42) and disc springs (43) are stacked inside the clutch valve body (41); when the disc springs (43) are not compressed, the clutch plates (42) are able to rotate relative to each other; and a thrust bearing (44) is provided between the clutch plate (42) and the piston body (51).

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