An integrated dual-rotor transmission oil pump

Abstract

This invention provides an integrated dual-rotor transmission oil pump, comprising an oil pump body, a pump cover at the mounting end of the oil pump body, and a sealing gasket body between the oil pump body and the pump cover. The gasket body is sealed and press-fitted with the oil pump body and the pump cover via a connecting assembly. A high-pressure pump chamber is provided on the outer surface of the oil pump body, and a matching high-pressure pump assembly is assembled inside the high-pressure pump chamber. A low-pressure pump chamber is also provided on the outer surface of the oil pump body, and a matching low-pressure pump assembly is assembled inside the low-pressure pump chamber. This invention employs a dual-rotor structure design, integrating the low-pressure pump assembly (lubrication pump) and the high-pressure pump assembly (drive pump) into a single oil pump. This significantly reduces space occupation and manufacturing costs, while also facilitating overall assembly. Furthermore, the gasket body design reduces the manufacturing difficulty of the oil pump body and pump cover while ensuring sealing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gearbox oil pump, in particular to a gearbox oil pump with integrated double-rotor structure. BACKGROUND

[0002] The function of the gearbox oil pump is to provide hydraulic pressure for the control valve and clutch, and to supply the gear oil in the gearbox and differential case quantitatively, and to send the gearbox oil to the cooler for circulation and heat dissipation. There are two oil pumps in the gearbox. The two oil pumps are installed in one assembly and separated by a partition. They work at the same speed as the engine. The main oil pump supplies oil to the entire system, while the oil return pump only pumps the oil in the torque converter oil pan back to the gearbox oil pan without pressure. The main oil pump is much wider than the oil return pump, with two oil paths. One is lubrication, which provides lubrication for the friction plates and clutch plates of various gears in the gearbox. The other method is shifting. It also has the function of reducing oil temperature and mainly supplies the pressure regulating device. The gearbox oil supply maintains sufficient compensation pressure and flow to ensure that the hydraulic components can complete the power transmission function. It prevents cavitation in the torque converter and timely removes the heat of the torque converter to maintain normal operating temperature.

[0003] Most of the current automobile gearbox oil pump lubrication pumps and drive pumps are designed in a split type, which makes the volume of the gearbox oil pump large, the structure complex, and the space occupation multiple. Not only is it not easy to assemble, but it also increases the manufacturing difficulty. Therefore, a gearbox oil pump with integrated double-rotor structure is provided to solve the problems. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a gearbox oil pump with integrated double-rotor structure, which solves the problems of large volume, complex structure, and multiple space occupation of the existing gearbox oil pump, which not only is not easy to assemble, but also increases the manufacturing difficulty.

[0006] (II) Technical solutions

[0007] To achieve the above objectives, the present invention provides the following technical solution: an integrated dual-rotor transmission oil pump, comprising an oil pump body, a pump cover at the mounting end of the oil pump body, a gasket body with a sealing function disposed between the oil pump body and the pump cover, the gasket body being sealed and press-fitted with the oil pump body and the pump cover via a connecting assembly, a high-pressure pump chamber disposed on the outer surface of the oil pump body, a matching high-pressure pump assembly being assembled inside the high-pressure pump chamber, a low-pressure pump chamber disposed on the outer surface of the oil pump body, a matching low-pressure pump assembly being assembled inside the low-pressure pump chamber, and a low-pressure inlet channel disposed on the outer surface of the gasket body, the low-pressure inlet channel being sealed and connected to the low-pressure pump chamber. The outer surface of the pump cover is provided with an oil inlet, which is sealed and connected to the low-pressure inlet channel. The outer surface of the pad body is provided with a low-pressure outlet channel, which is sealed and connected to the low-pressure pump chamber. The outer surface of the oil pump body is provided with a low-pressure outlet, which is sealed and connected to the low-pressure outlet channel. The outer surface of the pad body is provided with a high-pressure inlet channel, which is sealed and connected to the high-pressure pump chamber. The outer surface of the pad body is provided with a high-pressure outlet channel, which is sealed and connected to the high-pressure pump chamber. The outer surface of the pump cover is provided with a high-pressure outlet, which is sealed and connected to the high-pressure outlet channel. A filter assembly is installed at the opening of the oil inlet.

[0008] Preferably, the outer surface of the pad body is provided with a small through hole, which matches the high-pressure pump chamber. A small circular plate is provided inside the small through hole, and the diameter of the small circular plate is much smaller than the inner diameter of the small through hole. Two first connecting rods are fixedly connected between the outer surface of the small circular plate and the small through hole. The two first connecting rods cooperate with the small circular plate to symmetrically divide the small through hole into a high-pressure inlet channel and a high-pressure outlet channel. The outer surface of the pad body is provided with a large through hole, which matches the low-pressure pump chamber. A large circular plate is provided inside the large through hole, and the diameter of the large circular plate is much smaller than the inner diameter of the large through hole. Two second connecting rods are fixedly connected between the outer surface of the large circular plate and the large through hole. The two second connecting rods cooperate with the large circular plate to symmetrically divide the large through hole into a low-pressure inlet channel and a low-pressure outlet channel.

[0009] Preferably, both the high-pressure inlet channel and the high-pressure outlet channel are provided with a first reinforcing rib, and the first reinforcing rib is fixedly connected to the outer surface of the small circular plate and the inner wall of the small through hole. Both the low-pressure inlet channel and the low-pressure outlet channel are provided with a second reinforcing rib, and the second reinforcing rib is fixedly connected to the outer surface of the large circular plate and the inner wall of the large through hole.

[0010] Preferably, the thickness of the pad body, the small circular plate, the large circular plate, the first connecting rod and the second connecting rod are the same and they are on the same plane, and the thickness of the first reinforcing rib and the second reinforcing rib is less than the thickness of the pad body.

[0011] Preferably, the pad body, small circular plate, large circular plate, first connecting rod, second connecting rod, first reinforcing rib and second reinforcing rib are integrated into one piece.

[0012] Preferably, the connecting assembly includes a plurality of locating pins and three pin holes that match the locating pins. The three pin holes are respectively opened on the outer surface of the pad body, the inner surface of the oil pump body and the pump cover. The locating pins are arranged through the three pin holes and slide with the three adjacent pin holes.

[0013] Preferably, the connecting assembly includes multiple connecting bolts, and the connecting bolts are threadedly connected to the oil pump body and the pump cover. The outer surface of the pad body is provided with multiple mounting holes that match the connecting bolts.

[0014] Preferably, the high-pressure pump assembly includes a high-pressure outer rotor, which is disposed inside the high-pressure pump chamber and slides therewith. A high-pressure inner rotor is assembled inside the high-pressure outer rotor, and the high-pressure outer rotor and the high-pressure inner rotor are matched. The inner surface of the high-pressure inner rotor is provided with a keyway, and both ends of the keyway are provided with chamfers for easy assembly.

[0015] Preferably, the low-pressure pump assembly includes a low-pressure outer rotor, which is disposed inside the low-pressure pump chamber and slides therewith. A low-pressure inner rotor is assembled inside the low-pressure outer rotor, and the low-pressure outer rotor and the low-pressure inner rotor are matched. A keyway is provided on the inner surface of the low-pressure inner rotor, and both ends of the keyway are provided with chamfers for easy assembly.

[0016] Preferably, the filter assembly includes an assembly ring, which is disposed inside the oil inlet and fixedly connected to the oil inlet. An installation frame is fitted to the outer surface of the assembly ring. Multiple screws are connected between the installation frame and the assembly ring, and the screws are evenly distributed on the outer surface of the installation frame. The screws are made of stainless steel. A filter screen body is fixedly connected to the inner surface of the installation frame.

[0017] Working Principle: During assembly, first, the high-pressure outer rotor is installed, slidingly fitted into the high-pressure pump chamber. Then, the high-pressure inner rotor is matched and installed inside the high-pressure outer rotor. Next, the low-pressure outer rotor is installed, slidingly fitted into the high-pressure pump chamber. Then, the low-pressure inner rotor is matched and installed inside the low-pressure outer rotor. Next, the gasket body abuts against the oil pump body, and is positioned using pin holes and locating pins. Then, the pump cover is installed, also positioned using pin holes aligned with locating pins. Finally, the oil pump body, pump cover, and gasket body are pressed and sealed together with connecting bolts. The entire assembly is then installed at the gearbox connection end. Simultaneously, the splined shaft connected to the external drive mechanism is inserted into the keyways of the high-pressure and low-pressure inner rotors. A dual-rotor structure design integrates the low-pressure pump assembly (lubrication pump) and the high-pressure pump assembly (drive pump) into a single oil pump, significantly reducing space occupation and manufacturing costs, while also making overall assembly easier. During use, the oil output from the high-pressure pump assembly is used for power, while the oil output from the low-pressure pump assembly... The output oil is used for lubrication. An external drive mechanism drives the splined shaft to rotate, which in turn drives the high-pressure inner rotor and the low-pressure inner rotor to rotate. The high-pressure inner rotor and the high-pressure outer rotor work together to generate a negative pressure, which draws the oil in through the oil inlet and then into the high-pressure pump chamber through the high-pressure inlet channel. Next, the high-pressure inner rotor and the high-pressure outer rotor work together to force the oil into the high-pressure discharge channel and then discharge it through the high-pressure outlet. At the same time, the low-pressure inner rotor and the low-pressure outer rotor work together to generate a negative pressure, which draws the oil in through the oil inlet and then into the low-pressure pump chamber through the low-pressure inlet channel. Next, the low-pressure inner rotor and the low-pressure outer rotor work together to force the oil into the low-pressure discharge channel and then discharge it through the low-pressure outlet. Meanwhile, when the oil enters the oil inlet, the filter screen can filter out metal impurities in the oil, preventing metal impurities from entering the high-pressure pump chamber and the low-pressure pump chamber, thereby reducing the wear of the high-pressure inner rotor, the high-pressure outer rotor, the low-pressure inner rotor, and the low-pressure outer rotor, and improving the service life of the high-pressure inner rotor, the high-pressure outer rotor, the low-pressure inner rotor, and the low-pressure outer rotor.

[0018] (III) Beneficial Effects

[0019] This invention provides an integrated dual-rotor transmission oil pump.

[0020] It has the following beneficial effects:

[0021] 1. The present invention adopts a dual rotor structure design, which integrates the low-pressure pump assembly (lubrication pump) and the high-pressure pump assembly (drive pump) into an oil pump, which can greatly reduce space occupation and manufacturing costs, and also make the overall assembly easier. At the same time, the design of the gasket body can reduce the manufacturing difficulty of the oil pump body and pump cover while ensuring sealing.

[0022] 2. The present invention adds connecting ribs to the high pressure inlet channel, high pressure outlet channel, low pressure inlet channel and low pressure outlet channel on the pad body to enhance the strength of the pad body and prevent deformation during product operation.

[0023] 3. Both ends of the keyway of the low-pressure inner rotor and the high-pressure inner rotor of the present invention are chamfered, which is beneficial to the assembly of the spline shaft.

[0024] 4. The present invention can filter the oil entering the oil inlet by setting the filter component, so as to prevent metal impurities from entering the high-pressure pump chamber and the low-pressure pump chamber, thereby reducing the wear of the high-pressure pump component and the low-pressure pump component and ensuring their service life. Attached Figure Description

[0025] Figure 1 An exploded view of an integrated dual-rotor transmission oil pump;

[0026] Figure 2 A perspective view of an integrated dual-rotor transmission oil pump;

[0027] Figure 3 A front view of an integrated dual-rotor transmission oil pump;

[0028] Figure 4 A cross-sectional view of an integrated dual-rotor transmission oil pump;

[0029] Figure 5 A perspective view of the gasket body in an integrated dual-rotor gearbox oil pump;

[0030] Figure 6 This is a schematic diagram of the first filter component and the second component in an integrated dual-rotor transmission oil pump.

[0031] The components are as follows: 1. Oil pump body; 2. Pump cover; 3. Gasket body; 4. Small circular plate; 5. First connecting rod; 6. First reinforcing rib; 7. Large circular plate; 8. Second connecting rod; 9. Second reinforcing rib; 10. Positioning pin; 11. Connecting bolt; 12. High-pressure outer rotor; 13. High-pressure inner rotor; 14. Low-pressure outer rotor; 15. Low-pressure inner rotor; 16. Oil inlet; 17. Low-pressure outlet; 18. High-pressure outlet; 19. Filter screen body; 20. Assembly ring; 21. Mounting frame. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] like Figures 1-6 As shown, this embodiment of the invention provides an integrated dual-rotor transmission oil pump, including an oil pump body 1. The oil pump body 1 primarily provides support for the main body of the oil pump and also serves a sealing function. A pump cover 2 is provided at the mounting end of the oil pump body 1. Both the pump cover 2 and the outer surface of the oil pump body 1 are provided with reinforcing ribs. The reinforcing ribs are connected to various holes and posts on the pump cover 2 and the oil pump body 1. This enhances the strength and rigidity of the pump cover 2 and the oil pump body 1 without increasing their wall thickness, thereby saving material usage, reducing weight, and lowering costs. The oil pump body 1 and the pump cover 2 share a common... A gasket body 3 with a sealing function is provided. The gasket body 3 is sealed and pressed together with the oil pump body 1 and the pump cover 2 through a connecting assembly. This reduces the manufacturing difficulty of the oil pump body 1 and the pump cover 2 while ensuring sealing. A high-pressure pump chamber is provided on the outer surface of the oil pump body 1, which facilitates the installation of the high-pressure pump assembly. The high-pressure pump assembly is installed inside the high-pressure pump chamber, and the oil output by the high-pressure pump assembly is used as power. A low-pressure pump chamber is provided on the outer surface of the oil pump body 1, which facilitates the installation of the low-pressure pump assembly. The low-pressure pump assembly is installed inside the low-pressure pump chamber. The oil output from the pump body is used for lubrication. A low-pressure inlet channel is provided on the outer surface of the pad body 3, and this channel is sealed to the low-pressure pump chamber. An oil inlet 16 is provided on the outer surface of the pump cover 2, and this inlet 16 is sealed to the low-pressure inlet channel. A low-pressure outlet channel is provided on the outer surface of the pad body 3, and this channel is sealed to the low-pressure pump chamber. A low-pressure outlet 17 is provided on the outer surface of the pump body 1. A sealing ring is fixedly embedded at the end of the low-pressure outlet 17, which facilitates the sealing connection of the low-pressure outlet 17 and ensures a sealed connection between the low-pressure outlet 17 and the low-pressure outlet channel. The outer surface of the pad body 3 is provided with a high-pressure inlet channel, and the oil inlet 16 is sealed and connected to the high-pressure pump chamber through the high-pressure inlet channel. The outer surface of the pad body 3 is provided with a high-pressure discharge channel, and the high-pressure discharge channel is sealed and connected to the high-pressure pump chamber. The outer surface of the pump cover 2 is provided with a high-pressure outlet 18, and the high-pressure outlet 18 is sealed and connected to the high-pressure discharge channel. A filter assembly is installed at the opening of the oil inlet 16. The filter assembly can filter the oil and prevent worn metal particles from entering the interior of the oil pump body 1, thereby reducing the wear of the low-pressure pump assembly and the high-pressure pump assembly.

[0035] During assembly, the high-pressure pump assembly and the low-pressure pump assembly are first installed in the high-pressure pump chamber and the low-pressure pump chamber, respectively. Then, the pump cover 2, the gasket body 3 and the oil pump body 1 are pressed and fixed together by the connecting components. The pump cover 2, the gasket body 3 and the oil pump body 1 have a sealing function, and the oil pump body 1 also has a supporting function. Next, the whole is connected to the external connecting mechanism. The low-pressure pump assembly (lubricating pump) and the high-pressure pump assembly (drive pump) are designed as an integrated oil pump, which can greatly reduce the space occupation and manufacturing cost, and also make the overall assembly easier. The high-pressure pump assembly and the low-pressure pump assembly are respectively connected to the spline shaft of the external drive mechanism, which facilitates the operation of the high-pressure pump assembly and the low-pressure pump assembly.

[0036] In use, the keyway is connected to an external spline shaft. The external drive mechanism drives the high-pressure pump assembly and the low-pressure pump assembly through the spline shaft, thereby generating negative pressure suction to draw oil into the oil inlet 16. When the oil enters the oil inlet 16, it needs to be filtered by the filter assembly. The oil filtered by the filter assembly is drawn into the high-pressure inlet channel and the low-pressure inlet channel respectively, and then into the high-pressure pump chamber and the low-pressure pump chamber respectively. Then, under the action of the high-pressure pump assembly and the low-pressure pump assembly, the oil drawn into the high-pressure pump chamber and the low-pressure pump chamber is forced into the high-pressure discharge channel and the low-pressure discharge channel, and finally discharged through the low-pressure discharge outlet 17 and the high-pressure discharge outlet 18.

[0037] Example 2:

[0038] Figure 1 As shown, the connecting assembly includes multiple positioning pins 10 and three pin holes that match the positioning pins 10. The three pin holes are respectively opened on the outer surface of the pad body 3, the inner surface of the oil pump body 1 and the pump cover 2. The positioning pins 10 are set through the three pin holes and slide with the three adjacent pin holes. The positioning pins 10 cooperate with the pin holes to play a positioning role, which is conducive to the cooperation between the oil pump body 1, the pump cover 2 and the pad body 3. Both ends of the positioning pins 10 are chamfered, and the openings of the three pin holes are also chamfered, which is conducive to removing burrs at the openings of the positioning pins 10 and the pin holes, and also facilitates the insertion and installation of the positioning pins 10 into the pin holes.

[0039] The connecting assembly includes multiple connecting bolts 11, and the connecting bolts 11 are threadedly connected to the oil pump body 1 and the pump cover 2. The outer surface of the pad body 3 is provided with multiple mounting holes that match the connecting bolts 11. The outer surfaces of the oil pump body 1 and the pump cover 2 are also provided with mounting holes, and the mounting holes are provided with internal threads that match the connecting bolts 11, so as to lock the oil pump body 1 and the pump cover 2 together. At the same time, the connecting bolts 11 are made of stainless steel. Because stainless steel has good corrosion resistance, it can prevent the connecting bolts 11 from corroding in this environment, thereby improving the service life of the connecting bolts 11.

[0040] When assembling and connecting the oil pump body 1, pump cover 2 and pad body 3, the oil pump body 1, pump cover 2 and pad body 3 should first be positioned by using the positioning pin 10 to cooperate with the pin hole, and then the oil pump body 1, pump cover 2 and pad body 3 should be fixed together by the connecting bolt 11 to complete the overall assembly.

[0041] Example 3:

[0042] Figure 1 , Figure 3 and Figure 4 As shown, the high-pressure pump assembly includes a high-pressure outer rotor 12, which is disposed inside the high-pressure pump chamber and slides therewith. A high-pressure inner rotor 13 is assembled inside the high-pressure outer rotor 12. The high-pressure inner rotor 13 consists of an inner rotor and a connecting shaft. The connecting shaft is fixedly connected to the outer surface of the inner rotor, and the high-pressure outer rotor 12 matches the high-pressure inner rotor 13. A keyway is provided on the inner surface of the high-pressure inner rotor 13. Both ends of the keyway are provided with chamfers for easy assembly. The chamfers are designed to remove burrs and increase the aesthetics of the high-pressure inner rotor 13. They also serve as installation guides, making assembly easier and facilitating the installation of the high-pressure inner rotor 13 with the splined shaft on the external drive mechanism.

[0043] The low-pressure pump assembly includes a low-pressure outer rotor 14, which is disposed inside the low-pressure pump chamber and slides therewith. A low-pressure inner rotor 15 is assembled inside the low-pressure outer rotor 14. The low-pressure inner rotor 15 consists of an inner rotor and a connecting shaft. The connecting shaft is fixedly connected to the outer surface of the inner rotor, and the low-pressure outer rotor 14 matches the low-pressure inner rotor 15. The inner surface of the low-pressure inner rotor 15 is provided with a keyway, and both ends of the keyway are provided with chamfers for easy assembly. The chamfers are designed to remove burrs and increase the aesthetics of the low-pressure inner rotor 15. They also serve as installation guides, making assembly easier and facilitating the installation of the low-pressure inner rotor 15 with the splined shaft on the external drive mechanism.

[0044] The high-pressure pump assembly can be connected to an external splined shaft via a keyway, and then to an external drive mechanism via the external splined shaft, to facilitate the rotation of the high-pressure inner rotor 13, thereby driving the high-pressure outer rotor 12 to rotate and provide power (driving force) for the transmission fluid. The low-pressure pump assembly can be connected to an external splined shaft via a keyway, and then to an external drive mechanism via the external splined shaft, to facilitate the rotation of the low-pressure inner rotor 15, thereby driving the low-pressure outer rotor 14 to rotate and provide power (lubrication) for the transmission fluid.

[0045] Example 4:

[0046] Figure 1 and Figure 5As shown, the outer surface of the gasket body 3 is provided with a small through hole, which matches the high-pressure pump chamber. A small circular plate 4 is provided inside the small through hole, and the diameter of the small circular plate 4 is much smaller than the inner diameter of the small through hole. Two first connecting rods 5 are fixedly connected between the outer surface of the small circular plate 4 and the small through hole. The two first connecting rods 5, together with the small circular plate 4, symmetrically divide the small through hole into a high-pressure inlet channel and a high-pressure outlet channel. The separation of the high-pressure inlet channel and the high-pressure outlet channel by the first connecting rods 5 and the small circular plate 4 facilitates good oil flow. As a result, a large through hole is provided on the outer surface of the pad body 3, and the large through hole matches the low-pressure pump chamber. A large circular plate 7 is provided inside the large through hole, and the diameter of the large circular plate 7 is much smaller than the inner diameter of the large through hole. Two second connecting rods 8 are fixedly connected between the outer surface of the large circular plate 7 and the large through hole. The two second connecting rods 8 cooperate with the large circular plate 7 to symmetrically divide the large through hole into a low-pressure inlet channel and a low-pressure outlet channel. The second connecting rods 8 and the large circular plate 7 separate the low-pressure inlet channel and the low-pressure outlet channel, which is conducive to the oil having a good flow effect.

[0047] Both the high-pressure inlet channel and the high-pressure outlet channel are equipped with a first reinforcing rib 6, which is fixedly connected to the outer surface of the small circular plate 4 and the inner wall of the small through hole. The first reinforcing rib 6 ensures the connection strength between the small circular plate 4 and the pad body 3, preventing the small circular plate 4 from deforming due to excessive oil pressure, thus affecting the oil flow. Both the low-pressure inlet channel and the low-pressure outlet channel are equipped with a second reinforcing rib 9, which is fixedly connected to the outer surface of the large circular plate 7 and the inner wall of the large through hole. The second reinforcing rib 9 ensures the connection strength between the large circular plate 7 and the pad body 3, preventing the large circular plate 7 from deforming due to excessive oil pressure, thus affecting the oil flow.

[0048] The thickness of the pad body 3, the small circular plate 4, the large circular plate 7, the first connecting rod 5 and the second connecting rod 8 are the same and they are on the same plane. The thickness of the first reinforcing rib 6 and the second reinforcing rib 9 is less than the thickness of the pad body 3, so as to avoid separating the high pressure inlet channel, the high pressure outlet channel, the low pressure inlet channel and the low pressure outlet channel, which is conducive to the flow of oil in the high pressure inlet channel, the high pressure outlet channel, the low pressure inlet channel and the low pressure outlet channel.

[0049] The pad body 3, small circular plate 4, large circular plate 7, first connecting rod 5, second connecting rod 8, first reinforcing rib 6 and second reinforcing rib 9 are designed as a single piece and are cast as a whole, which can ensure the positional accuracy of each component. At the same time, the small circular plate 4, large circular plate 7, first connecting rod 5, second connecting rod 8, first reinforcing rib 6 and second reinforcing rib 9 do not require connection operations, which can reduce unnecessary processing steps and improve processing efficiency.

[0050] During overall operation, the high-pressure inlet channel, high-pressure outlet channel, low-pressure inlet channel and low-pressure outlet channel on the pad body 3 are separated from each other and are respectively connected to the high-pressure pump chamber, oil inlet 16, low-pressure pump chamber, high-pressure outlet 18 and low-pressure outlet 1, which is conducive to the flow of oil. The setting of the first reinforcing rib 6 and the second reinforcing rib 9 can increase the overall strength of the pad body 3.

[0051] Example 5:

[0052] Figure 6 As shown, each filter assembly includes an assembly ring 20, which is respectively disposed inside the oil inlet 16 and fixedly connected to the oil inlet 16. An outer mounting frame 21 is fitted onto the outer surface of the assembly ring 20. Multiple screws are connected between the outer mounting frame 21 and the assembly ring 20, and the screws are evenly distributed on the outer surface of the outer mounting frame 21. The screws are made of stainless steel, which has good corrosion resistance, preventing corrosion damage during long-term use and ensuring the service life of the screws. This facilitates the disassembly of the outer mounting frame 21 and the assembly ring 20 after connection. A filter screen body 19 is fixedly connected to the inner surface of the outer mounting frame 21. The filter screen body 19 can filter the oil, preventing metal particles from the gearbox after wear from entering the high-pressure pump assembly and low-pressure pump assembly in the oil pump body 1, thereby reducing wear on the high-pressure pump assembly and low-pressure pump assembly and improving their service life.

[0053] When installing the filter body 19, fit the mounting frame 21 with the assembly ring 20, then rotate the mounting frame 21 until the mounting holes on the mounting frame 21 correspond to the mounting holes on the assembly ring 20. Then insert the bolts into the mounting holes on the mounting frame 21, and then tighten the screws with an external screwdriver until the mounting frame 21 and the assembly ring 20 are fixed. Then install the remaining screws in sequence until the installation is completed, thereby fixing the filter body 19.

[0054] When disassembly is required, use an external screwdriver to remove each screw one by one, so that the mounting frame 21 is separated from the assembly ring 20. Then remove the filter body 19 and the mounting frame 21 to complete the disassembly of the filter body 19.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated dual-rotor-structure gearbox oil pump comprising an oil pump body (1), characterized in that: The mounting end of the oil pump body (1) is provided with a pump cover (2), the oil pump body (1) and the pump cover (2) are jointly provided with a gasket body (3) having a sealing function, the gasket body (3) and the oil pump body (1) and the pump cover (2) are sealingly and tightly connected through a connecting assembly, the outer surface of the oil pump body (1) is provided with a high-pressure pump cavity, the high-pressure pump cavity is internally fitted with a matching high-pressure pump assembly, the outer surface of the oil pump body (1) is provided with a low-pressure pump cavity, the low-pressure pump cavity is internally fitted with a matching low-pressure pump assembly, the outer surface of the gasket body (3) is provided with a low-pressure inlet channel, and the low-pressure inlet channel is sealingly communicated with the low-pressure pump cavity, the outer surface of the pump cover (2) is provided with an oil inlet (16), and the oil inlet (16) is sealingly communicated with the low-pressure inlet channel, the outer surface of the gasket body (3) is provided with a low-pressure discharge channel, and the low-pressure discharge channel is sealingly communicated with the low-pressure pump cavity, the outer surface of the oil pump body (1) is provided with a low-pressure discharge port (17), and the low-pressure discharge port (17) is sealingly communicated with the low-pressure discharge channel, the outer surface of the gasket body (3) is provided with a high-pressure inlet channel, and the oil inlet (16) is sealingly communicated with the high-pressure pump cavity through the high-pressure inlet channel, the outer surface of the gasket body (3) is provided with a high-pressure discharge channel, and the high-pressure discharge channel is sealingly connected with the high-pressure pump cavity, the outer surface of the pump cover (2) is provided with a high-pressure discharge port (18), and the high-pressure discharge port (18) is sealingly connected with the high-pressure discharge channel, the opening of the oil inlet (16) is fitted with a filter assembly, the high-pressure pump assembly and the low-pressure pump assembly are respectively connected with the spline shaft connected with the external driving mechanism, the high-pressure pump assembly provides power for the gearbox oil pump, and the oil output by the low-pressure pump assembly is used for lubrication.

2. An integrated dual-rotor gearbox oil pump according to claim 1, characterized in that: The outer surface of the gasket body (3) is provided with a small hole, and the small hole is matched with the high-pressure pump cavity, the inside of the small hole is provided with a small round plate (4), and the diameter of the small round plate (4) is much smaller than the inner diameter of the small hole, the outer surface of the small round plate (4) and the small hole are jointly and fixedly connected with two first connecting rods (5), the small hole is symmetrically divided into a high-pressure inlet channel and a high-pressure discharge channel by the cooperation of the two first connecting rods (5) and the small round plate (4), the outer surface of the gasket body (3) is provided with a large hole, and the large hole is matched with the low-pressure pump cavity, the inside of the large hole is provided with a large round plate (7), and the diameter of the large round plate (7) is much smaller than the inner diameter of the large hole, the outer surface of the large round plate (7) and the large hole are jointly and fixedly connected with two second connecting rods (8), and the large hole is symmetrically divided into a low-pressure inlet channel and a low-pressure discharge channel by the cooperation of the two second connecting rods (8) and the large round plate (7).

3. An integrated dual-rotor gearbox oil pump according to claim 2, characterized in that: The interiors of the high-pressure inlet channel and the high-pressure outlet channel are provided with first reinforcing ribs (6) fixedly connected between the outer surface of the small circular plate (4) and the inner wall of the small through hole.

4. An integrated dual-rotor gearbox oil pump according to claim 3, characterized in that: The thicknesses of the gusset body (3), the small circular plate (4), the large circular plate (7), the first connecting rod (5) and the second connecting rod (8) are consistent and are on the same plane, and the thicknesses of the first reinforcing ribs (6) and the second reinforcing ribs (9) are all less than the thickness of the gusset body (3).

5. An integrated dual-rotor gearbox oil pump according to claim 4, characterized in that: The gusset body (3), the small circular plate (4), the large circular plate (7), the first connecting rod (5), the second connecting rod (8), the first reinforcing ribs (6) and the second reinforcing ribs (9) are designed in an integrated manner.

6. An integrated dual-rotor gearbox oil pump according to claim 1, characterized in that: The connecting assembly comprises a plurality of positioning pins (10) and three pin holes matched with the positioning pins (10), the three pin holes are respectively formed in the outer surface of the gusset body (3), the inner surface of the oil pump body (1) and the pump cover (2), the positioning pins (10) pass through the three pin holes and are in sliding fit with the adjacent three pin holes.

7. An integrated dual-rotor gearbox oil pump according to claim 6, characterized in that: The connecting assembly comprises a plurality of connecting bolts (11) in threaded connection between the oil pump body (1) and the pump cover (2), and a plurality of mounting holes matched with the connecting bolts (11) are formed in the outer surface of the gusset body (3).

8. An integrated dual-rotor gearbox oil pump according to claim 1, characterized in that: The high-pressure pump assembly comprises a high-pressure outer rotor (12) in sliding fit with the interior of the high-pressure pump cavity, the high-pressure outer rotor (12) is internally fitted with a high-pressure inner rotor (13) matched with the high-pressure outer rotor (12), and the inner surface of the high-pressure inner rotor (13) is provided with a key groove with chamfers at both ends for easy assembly.

9. An integrated dual-rotor gearbox oil pump according to claim 1, wherein: The low-pressure pump assembly comprises a low-pressure outer rotor (14) in sliding fit with the interior of the low-pressure pump cavity, the low-pressure outer rotor (14) is internally fitted with a low-pressure inner rotor (15) matched with the low-pressure outer rotor (14), and the inner surface of the low-pressure inner rotor (15) is provided with a key groove with chamfers at both ends for easy assembly.

10. An integrated dual-rotor gearbox oil pump according to claim 1, characterized in that: The filter assembly comprises an assembly ring (20) fixedly connected between the interior of the oil inlet (16), the outer surface of the assembly ring (20) is attached with a mounting outer frame (21), a plurality of screws are connected between the assembly ring (20) and the mounting outer frame (21) and are uniformly distributed on the outer surface of the mounting outer frame (21), the screws are made of stainless steel, and the inner surface of the mounting outer frame (21) is fixedly connected with a filter screen body (19).

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