Pump structure, engine, powertrain and vehicle

Abstract

A pump structure, an engine, a powertrain and a vehicle. The pump structure (100) comprises a first transmission shaft (10) and a plurality of first pumping mechanisms (40), wherein the first transmission shaft (10) comprises a plurality of first sub-shafts (11), which are arranged in sequence in the axial direction of the first transmission shaft (10); the plurality of first pumping mechanisms (40) are configured to suck a medium out of an oil return component into an oil storage component; and at least one first pumping mechanism (40) among the plurality of first pumping mechanisms is disposed on each first sub-shaft among the plurality of first sub-shafts (11).

Description

Pump structure, engine, power assembly and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202411345664.1, filed on September 25, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of engines, and in particular to a pump structure, an engine, a power assembly and a vehicle. BACKGROUND

[0003] An engine is a core component of a vehicle, and a pump body is a part of the engine and is installed in the engine. The pump body includes an oil supply pump and an oil return pump. The oil supply pump can deliver pressurized oil to a lubricating oil passage to lubricate various components of the engine. The oil return pump can suck oil from the various components of the engine so that the oil supply pump can pressurize and deliver the oil to the lubricating oil passage again. SUMMARY

[0004] The present disclosure provides a pump structure, an engine, a power assembly and a vehicle to solve or at least partially solve the problem that the length of a transmission shaft is usually long and is inconvenient to process in the related art.

[0005] In a first aspect, a pump structure is provided, which includes a first transmission shaft and a plurality of first pumping mechanisms. The first transmission shaft includes a plurality of first sub-shafts arranged in sequence along an axial direction of the first transmission shaft. The first pumping mechanisms are configured to pump a medium from an oil return component to an oil storage component. At least one of the plurality of first pumping mechanisms is arranged on each of the plurality of first sub-shafts.

[0006] In some embodiments, the pump structure further includes a second transmission shaft, a first gear and at least one second gear. The plurality of second transmission shafts are arranged at intervals from the first transmission shaft. The first pumping mechanism includes the first gear arranged on the plurality of first sub-shafts. The at least one second gear is arranged on the second transmission shaft and is in meshing transmission with the first gear to pump the medium.

[0007] In some embodiments, the second transmission shaft includes a plurality of second sub-shafts arranged in sequence along an axial direction of the second transmission shaft. The at least one second gear is arranged on each of the plurality of second sub-shafts.

[0008] In some embodiments, the at least one second gear is provided on the at least one second sub-shaft; the first sub-shaft and the second sub-shaft are correspondingly provided, and the first gear on the first sub-shaft and the second gear on the corresponding second sub-shaft are engaged to pump the medium.

[0009] In some embodiments, the at least one second gear comprises a plurality of second gears; the at least one first pumping mechanism is provided on the at least one second sub-shaft of the plurality of second sub-shafts.

[0010] In some embodiments, the first transmission shaft is a driven shaft, and the second transmission shaft is a driving shaft.

[0011] In some embodiments, the first transmission shaft is a driving shaft, and the second transmission shaft is a driven shaft.

[0012] In some embodiments, the second transmission shaft comprises a plurality of second sub-shafts, the plurality of second sub-shafts are arranged in sequence along the axial direction of the second transmission shaft, and at least one second gear is provided on each second sub-shaft of the plurality of second sub-shafts; the plurality of first sub-shafts are connected in sequence along the axial direction of the first transmission shaft, and the plurality of second sub-shafts are arranged in sequence and spaced apart along the axial direction of the second transmission shaft.

[0013] In some embodiments, the first gear and the plurality of first sub-shafts are interference fit.

[0014] In some embodiments, the at least one second gear and the plurality of second sub-shafts are clearance fit, or the at least one second gear is loosely fitted on the plurality of second sub-shafts.

[0015] In some embodiments, the at least one second gear and the plurality of second sub-shafts are clearance fit, a first key groove is provided on the at least one second gear, a second key groove is provided on the plurality of second sub-shafts, and the second key groove is oppositely arranged with the first key groove; the pump structure further comprises a connecting key, and the connecting key is clamped in the first key groove and the second key groove.

[0016] In some embodiments, the first transmission shaft is adapted to be connected with a driving source, one end of two ends of each two adjacent first sub-shafts close to each other is provided with a first clamping part, and the other end is provided with a second clamping part, and the first clamping part is clamped in the second clamping part.

[0017] In some embodiments, the first clamping part comprises a polygonal column, the second clamping part comprises a polygonal groove, and the polygonal column is clamped in the polygonal groove.

[0018] In some embodiments, the pump structure further comprises: a third transmission shaft coaxially arranged with the first transmission shaft, and the third transmission shaft is connected to one of the first sub-shafts; and a second pumping mechanism arranged on the third transmission shaft, and the second pumping mechanism is configured to pump the medium from the oil storage component to the component to be lubricated.

[0019] In some embodiments, the second pumping mechanism comprises: a third gear arranged on the third transmission shaft; and an inner ring gear engaged with the third gear.

[0020] In some embodiments, the third transmission shaft is adapted to be connected to a driving source.

[0021] In some embodiments, the plurality of first pumping mechanisms satisfy at least one of the following conditions: the plurality of first pumping mechanisms comprises at least four first pumping mechanisms; or, some of the plurality of first pumping mechanisms are configured to pump the medium from a first component to be returned to the oil storage component, and some of the plurality of first pumping mechanisms are configured to pump the medium from a second component to be returned to the oil storage component.

[0022] In a second aspect, an engine is provided, which comprises the pump structure of the first aspect.

[0023] In some embodiments, the engine comprises an oil tank, a machine body, an oil sump, and a moving component mounted on the machine body, the oil sump is mounted at the bottom of the machine body, and the oil tank is mounted outside the machine body; some of the plurality of first pumping mechanisms are connected to the moving component to pump the medium from the moving component to the oil tank, and some of the plurality of first pumping mechanisms are connected to the oil sump to pump the medium from the oil sump to the oil tank.

[0024] In a third aspect, a power assembly is provided, which comprises the engine of the second aspect.

[0025] In a fourth aspect, a vehicle is provided, which comprises the engine of the second aspect or the power assembly of the third aspect.

[0026] In some embodiments of the present disclosure, a pump structure, an engine, a power assembly, and a vehicle are provided, the pump structure comprises a first transmission shaft, the first transmission shaft comprises a plurality of first sub-shafts arranged along the axial direction of the first transmission shaft; a first pumping mechanism configured to pump the medium from a component to be returned to an oil storage component; the number of the first pumping mechanisms is a plurality, and at least one first pumping mechanism is arranged on each first sub-shaft.

[0027] In some embodiments of the present disclosure, the first transmission shaft is divided into multiple first sub-shafts. When each first sub-shaft is machined, the length of each first sub-shaft is relatively short compared to the overall length of the first transmission shaft. Therefore, the coaxiality of the first transmission shaft can be better controlled to ensure the overall coaxiality of the first transmission shaft.

[0028] In some embodiments of the present disclosure, the medium is pumped from the oil return component to the oil storage component by the first pumping mechanism to complete the oil return. The multi-union structure of the oil return pump can improve the coaxiality of the multiple first sub-shafts when at least three or four oil return pumps are required.

[0029] In some embodiments of the present disclosure, at least one first pumping mechanism is arranged on each first sub-shaft to reduce the number of first sub-shafts and the overall length of the first transmission shaft, thereby reducing the coaxiality requirement of the first transmission shaft and ensuring the overall coaxiality of the first transmission shaft. BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 is a structural diagram of a pump structure according to some embodiments;

[0031] FIG. 2 is a cross-sectional view along line A-A in FIG. 1;

[0032] FIG. 3 is a cross-sectional view along line B-B in FIG. 1;

[0033] FIG. 4 is a cross-sectional view along line C-C in FIG. 1;

[0034] FIG. 5 is a partial cross-sectional view of a pump structure according to some embodiments;

[0035] FIG. 6 is another partial cross-sectional view of a pump structure according to some embodiments;

[0036] FIG. 7 is a block diagram of an engine according to some embodiments;

[0037] FIG. 8 is a block diagram of a powertrain according to some embodiments;

[0038] FIG. 9A is a block diagram of a vehicle according to some embodiments;

[0039] FIG. 9B is a block diagram of a vehicle according to some embodiments.

[0040] Reference signs: 100: pump structure; 200: engine; 300: power assembly; 1000: vehicle; 10: first transmission shaft; 11: first sub-shaft; 111: polygonal groove; 112: polygonal column; 20: second transmission shaft; 21: second sub-shaft; 30: second pumping mechanism; 40: first pumping mechanism; 41: first gear; 42: second gear; 50: connecting key; 60: third transmission shaft; 70: first oil inlet; 71: second oil inlet; 72: oil outlet; 73: first oil inlet channel; 74: second oil inlet channel. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in some embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0042] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0043] The pump body of the engine of the automobile usually includes a transmission shaft, and an oil supply pump and an oil return pump are connected in series on the transmission shaft, resulting in a long length of the transmission shaft and difficulty in controlling the coaxiality of the transmission shaft.

[0044] To solve the above problems, some embodiments of the present disclosure provide a pump structure 100.

[0045] FIG. 1 is a structural diagram of a pump structure according to some embodiments.

[0046] As shown in FIG. 1, some embodiments of the present disclosure provide a pump structure 100, which includes a first transmission shaft 10, the first transmission shaft 10 including a plurality of first sub-shafts 11 arranged in sequence along the axial direction (such as the X direction in FIG. 1) of the first transmission shaft 10.

[0047] The pump structure 100 further includes a plurality of first pumping mechanisms 40, the plurality of first pumping mechanisms 40 being configured to pump the medium from the oil return component to the oil storage component; and each of the plurality of first sub-shafts 11 is provided with at least one of the plurality of first pumping mechanisms 40.

[0048] Some embodiments of the present disclosure provide a pump structure which can be installed in an engine to supply and return oil for an engine lubrication system. The present disclosure does not limit the application scenarios of the pump structure. In actual applications, the skilled person can make settings as needed.

[0049] The following will take the application of the pump structure in the engine to supply and return oil for the engine lubrication system as an example to make relevant descriptions of some embodiments of the present disclosure.

[0050] As shown in FIG. 1, the pump structure 100 disclosed by some embodiments of the present disclosure includes a first transmission shaft 10 and a first pumping mechanism 40. The first transmission shaft 10 includes multiple first sub-shafts 11 which are arranged in sequence along the axial direction of the first transmission shaft 10. By dividing the first transmission shaft 10 into multiple first sub-shafts 11, the co-axiality of the first transmission shaft 10 can be better controlled to ensure the overall co-axiality of the first transmission shaft 10 when machining each first sub-shaft 11 of the multiple first sub-shafts 11, because the length of each first sub-shaft 11 is relatively short compared to the overall length of the first transmission shaft 10.

[0051] In some embodiments, the first transmission shaft 10 includes three first sub-shafts 11 which are arranged in sequence along the axial direction of the first transmission shaft 10. Alternatively, the first transmission shaft 10 includes two first sub-shafts 11 which are arranged in sequence along the axial direction of the first transmission shaft 10. The present disclosure does not limit the number of first sub-shafts 11 included in the first transmission shaft 10, and the skilled person can make settings as needed in actual applications.

[0052] As shown in FIG. 1, the pump structure 100 provided by some embodiments of the present disclosure further includes a first pumping mechanism 40 which can be used as an oil return pump to suck medium from a component to be returned to an oil storage component. The component to be returned in some embodiments of the present disclosure can be a component in which medium remains after being lubricated by the medium. For example, a moving component on an engine body. The component to be returned can also be a transfer component in a medium circulation flow path. For example, an oil pan of an engine. The present disclosure does not limit the structure of the component to be returned, and the skilled person can make settings as needed in actual applications.

[0053] In some embodiments, the medium in some embodiments of the present disclosure can be lubricating oil. The present disclosure does not limit the type of medium, and the skilled person can make settings as needed in actual applications.

[0054] As shown in FIG. 1, the pump structure 100 in some embodiments of the present disclosure includes a plurality of first pumping mechanisms 40, and at least one first pumping mechanism 40 is arranged on each first sub-shaft 11. In some embodiments of the present disclosure, at least one first pumping mechanism 40 is arranged on each first sub-shaft 11 to reduce the number of first sub-shafts 11, thereby further reducing the overall length of the first transmission shaft 10, reducing the coaxiality requirement of the first transmission shaft 10, and ensuring the overall coaxiality of the first transmission shaft 10.

[0055] In some embodiments of the present disclosure, the first pumping mechanism 40 is used to pump the medium from the oil return component to the oil storage component to complete the oil return. The oil return pump is designed in a multi-connection structure, and when at least three or four oil return pumps are required, the coaxiality of the multiple first sub-shafts 11 can be improved.

[0056] In some embodiments of the present disclosure, by dividing the first transmission shaft 10 into multiple first sub-shafts 11, the length of each first sub-shaft 11 is shorter than the overall length of the first transmission shaft 10 when each first sub-shaft 11 is machined. Therefore, the coaxiality of the first transmission shaft 10 can be better controlled to ensure the overall coaxiality of the first transmission shaft 10.

[0057] In some embodiments of the present disclosure, at least one first pumping mechanism 40 is arranged on each first sub-shaft 11 to reduce the number of first sub-shafts 11, thereby reducing the overall length of the first transmission shaft 10, reducing the coaxiality requirement of the first transmission shaft 10, and ensuring the overall coaxiality of the first transmission shaft 10.

[0058] In some embodiments, as shown in FIGS. 1-3 and 6, the pump structure 100 in some embodiments of the present disclosure further includes a second transmission shaft 20, and the second transmission shaft 20 is arranged in a spaced manner with the first transmission shaft 10. Each of the plurality of first pumping mechanisms 40 includes at least one first gear 41 and at least one second gear 42. The at least one first gear 41 is arranged on the plurality of first sub-shafts 11, and the at least one second gear 42 is arranged on the second transmission shaft 20. The at least one second gear 42 is engaged with the at least one first gear 41 to pump the medium.

[0059] As shown in FIG. 1, the pump structure 100 in some embodiments of the present disclosure further includes a second transmission shaft 20, and the second transmission shaft 20 is arranged in a spaced manner with the first transmission shaft 10. The second transmission shaft 20 can be a one-piece shaft to reduce the machining and assembly processes. The second transmission shaft 20 can also be a multi-piece shaft to facilitate the control of the coaxiality of the second transmission shaft 20. The present disclosure does not limit the structure of the second transmission shaft 20, and in actual applications, a technician can arrange the second transmission shaft 20 as needed.

[0060] The first pumping mechanism 40 in some embodiments of the present disclosure includes a first gear 41 and a second gear 42, the first gear 41 is arranged on the first sub-shaft 11, and the second gear 42 is arranged on the second transmission shaft 20. The second gear 42 is engaged and driven with the first gear 41 to pump the medium through the first gear 41 and the second gear 42.

[0061] It should be noted that the second gear 42 in some embodiments of the present disclosure can be sleeved on the second transmission shaft 20. When the second gear 42 is sleeved on the second transmission shaft 20, the second transmission shaft 20 does not need to ensure coaxiality, and the second transmission shaft 20 can adopt an integral shaft. The second gear 42 can also be drivingly connected to the second transmission shaft 20. In some embodiments, the second gear 42 can be in interference fit with the second transmission shaft 20, and the second gear 42 can be connected to the second transmission shaft 20 through a connecting key.

[0062] The first pumping mechanism 40 in some embodiments of the present disclosure includes a first gear 41 and a second gear 42, and the second gear 42 is engaged and driven with the first gear 41 to form an external gear pump through the second gear 42 and the first gear 41. The gear pump has strong anti-wear and anti-pollution ability and is suitable for various harsh working conditions. Moreover, multiple oil inlet ports can be arranged on the same gear pump, each oil inlet port is provided with a corresponding oil inlet channel, and the oil inlet channels are independent of each other and do not affect each other. When one oil inlet port sucks air, the other oil inlet port can work normally to meet the oil return demand of the engine under various working conditions.

[0063] In some embodiments of the present disclosure, the first pumping mechanism 40 including the first gear 41 and the second gear 42 forms an external gear pump, and the coaxiality requirement between the first transmission shaft 10 and the second transmission shaft 20 is higher. If one of the first transmission shaft 10 and the second transmission shaft 20 has a larger coaxiality, it will cause a larger error in the engagement accuracy between the first gear 41 and the second gear 42, which is not conducive to the work of the first pumping mechanism 40. In some embodiments of the present disclosure, the first transmission shaft 10 is arranged in a multi-segment structure, which is conducive to ensuring the engagement accuracy between the first gear 41 and the second gear 42 and ensuring the normal work of the first pumping mechanism 40.

[0064] In some embodiments, as shown in FIGS. 1-3, the second transmission shaft 20 in some embodiments of the present disclosure includes a plurality of second sub-shafts 21, which are arranged in sequence along the axial direction (such as the X direction in FIG. 1) of the second transmission shaft 20. Each of the plurality of second sub-shafts 21 is provided with at least one second gear 42.

[0065] As shown in FIGS. 1-3, the second transmission shaft 20 in some embodiments of the present disclosure includes a plurality of second sub-shafts 21, and the plurality of second sub-shafts 21 are arranged in sequence along the axial direction of the second transmission shaft 20. In some embodiments of the present disclosure, the second transmission shaft 20 is provided to include the plurality of second sub-shafts 21 to ensure the coaxiality of the second transmission shaft 20.

[0066] In some embodiments of the present disclosure, at least one second gear 42 is arranged on each second sub-shaft 21, and the second gear 42 can be engaged with the corresponding first gear 41 to pump the medium.

[0067] It should be noted that each second sub-shaft 21 in some embodiments of the present disclosure can be arranged corresponding to one first sub-shaft 11, the plurality of second sub-shafts 21 can be arranged corresponding to one first sub-shaft 11, and one second sub-shaft 21 can be arranged corresponding to a plurality of first sub-shafts 11. In this regard, the present disclosure does not make any limitation, and in actual applications, the skilled person can make the arrangement according to the needs.

[0068] In some embodiments, as shown in FIG. 3, at least one second sub-shaft 21 of the plurality of second sub-shafts 21 is provided with a plurality of second gears 42; the plurality of first sub-shafts 11 and the plurality of second sub-shafts 21 are arranged corresponding to each other, and the first gear 41 on the first sub-shaft 11 and the corresponding second gear 42 on the second sub-shaft 21 are engaged to pump the medium.

[0069] As shown in FIG. 3, in some embodiments of the present disclosure, the at least one second sub-shaft 21 is provided with a plurality of second gears 42, so as to integrate the plurality of second gears 42 on the same second sub-shaft 21, thereby reducing the number of second sub-shafts 21, shortening the overall length of the second transmission shaft 20, reducing the coaxiality requirement of the second transmission shaft 20, and ensuring the overall coaxiality of the second transmission shaft 20.

[0070] In some embodiments of the present disclosure, the plurality of first sub-shafts 11 and the plurality of second sub-shafts 21 are arranged corresponding to each other, and the first sub-shaft 11 is provided with the first gear 41, and the second sub-shaft 21 is provided with the second gear 42, and the first gear 41 and the corresponding second gear 42 are engaged to pump the medium. Through the above arrangement, the overall length of the first transmission shaft 10 and the second transmission shaft 20 is relatively short, and the coaxiality of the first transmission shaft 10 and the second transmission shaft 20 can be well controlled to ensure the overall coaxiality of the first transmission shaft 10 and the second transmission shaft 20.

[0071] In some embodiments, the first gear 41 is arranged on each first sub-shaft 11, the second gear 42 is arranged on the corresponding second sub-shaft 21, and the second gear 42 is engaged in transmission with the first gear 41 to form an external gear pump through the second gear 42 and the first gear 41. The gear pump has strong anti-wear and anti-pollution ability and is suitable for various harsh working conditions. In addition, the same gear pump can be provided with multiple oil inlet ports, each of which is provided with a corresponding oil inlet channel, and each oil inlet channel is independent of each other and does not affect each other. When one oil inlet port sucks air, the other oil inlet port can work normally to meet the oil return requirements of the engine under various working conditions.

[0072] In some embodiments, at least one first sub-shaft 11 is provided with multiple first pumping mechanisms 40.

[0073] In some embodiments of the present disclosure, at least one first pumping mechanism 40 is arranged on each first sub-shaft 11, and multiple first pumping mechanisms 40 are integrated on the same first sub-shaft 11 to reduce the number of first sub-shafts 11, thereby further reducing the overall length of the first transmission shaft 10, reducing the coaxiality requirement of the first transmission shaft 10, and ensuring the overall coaxiality of the first transmission shaft 10.

[0074] In some embodiments, through the above arrangement, the support structure of the housing of the pump structure 100 can also be simplified. If each first pumping mechanism 40 corresponds to a first sub-shaft 11, the housing needs to be provided with a support structure at both ends of multiple first sub-shafts 11, resulting in a too complex housing structure.

[0075] In some embodiments, the first transmission shaft 10 in some embodiments of the present disclosure is a driven shaft, and the second transmission shaft 20 is a driving shaft.

[0076] In some embodiments of the present disclosure, the first transmission shaft 10 is arranged as a driven shaft, the second transmission shaft 20 is arranged as a driving shaft, and the driven shaft is arranged in a multi-segment structure to ensure the coaxiality of the driven shaft.

[0077] It should be noted that the driving shaft in some embodiments of the present disclosure refers to the shaft connected to the power source, and the driving shaft can be directly driven to rotate by the power source. The driven shaft is connected to the driving shaft through a transmission structure, and the driving shaft can drive the driven shaft to rotate through the transmission structure.

[0078] In some embodiments, the first transmission shaft 10 in some embodiments of the present disclosure is a driving shaft, and the second transmission shaft 20 is a driven shaft.

[0079] In some embodiments of the present disclosure, the first transmission shaft 10 is set as the driving shaft, the second transmission shaft 20 is set as the driven shaft, and the driving shaft is set as a multi-section structure to ensure the coaxiality of the driving shaft. In addition, the driving shaft is connected to the power source and needs to receive power input, and the driving shaft has higher requirements for coaxiality. Therefore, the coaxiality of the driving shaft is preferentially ensured.

[0080] In some embodiments, as shown in FIG. 1 and FIG. 3, the second transmission shaft 20 includes a plurality of second sub-shafts 21 arranged in sequence along the axial direction of the second transmission shaft 20, and at least one second gear 42 is arranged on each of the plurality of second sub-shafts 21; the plurality of first sub-shafts 11 are connected in sequence along the axial direction of the first transmission shaft 10, and the plurality of second sub-shafts 21 are arranged in sequence and spaced apart along the axial direction of the second transmission shaft 20.

[0081] If the first transmission shaft 10 is determined as the driving shaft and the second transmission shaft 20 is determined as the driven shaft, the plurality of first sub-shafts 11 are connected in sequence along the axial direction of the first transmission shaft 10, and the plurality of second sub-shafts 21 are arranged in sequence and spaced apart along the axial direction of the second transmission shaft 20. Due to various reasons such as machining errors, the plurality of first gears 41 and the plurality of second gears 42 cannot be guaranteed to mesh at the same time, or simultaneously disengage. Therefore, the size and direction of the force acting on each second gear 42 at the same time are inconsistent. In order to ensure that the plurality of second sub-shafts 21 can rotate freely, in some embodiments of the present disclosure, the plurality of second sub-shafts 21 are arranged in sequence and spaced apart to avoid excessive constraint of the degrees of freedom of the plurality of second sub-shafts 21, which leads to the inability to rotate and affects the reliability of the pump structure.

[0082] In some embodiments, as shown in FIG. 1 and FIG. 2, the first gear 41 and the first sub-shaft 11 are interference fit in some embodiments of the present disclosure.

[0083] As shown in FIG. 1 and FIG. 2, in some embodiments of the present disclosure, the first gear 41 is sleeved on the first sub-shaft 11, and the first gear 41 is interference fit with the first sub-shaft 11, thereby connecting the first gear 41 to the first sub-shaft 11.

[0084] In some embodiments of the present disclosure, the driving mechanism drives the first transmission shaft 10 to rotate, and the driving force of the driving mechanism can be transmitted to each first sub-shaft 11. The first gear 41 and the first sub-shaft 11 are interference fit, and each first sub-shaft 11 continuously and stably transmits the driving force to the corresponding first gear 41, thereby making the transmission of the driving force more reliable and stable.

[0085] In some embodiments, as shown in FIG. 3, the second gear 42 and the second sub-shaft 21 are clearance fit, or the second gear 42 is sleeved on the second sub-shaft 21 in some embodiments of the present disclosure.

[0086] As shown in FIG. 3, the second gear 42 in some embodiments of the present disclosure is sleeved on the second sub-shaft 21, and the second gear 42 is in clearance fit with the second sub-shaft 21 to facilitate the installation of the second gear 42. Alternatively, the second gear 42 is loosely sleeved on the second sub-shaft 21 to facilitate the installation of the second gear 42.

[0087] In some embodiments, as shown in FIG. 3, the second gear 42 and the second sub-shaft 21 are in clearance fit, the second gear 42 is provided with a first key groove, the second sub-shaft 21 is provided with a second key groove, and the second key groove is oppositely arranged with the first key groove; the pump structure 100 further comprises a connecting key 50, which is clamped in the first key groove and the second key groove.

[0088] As shown in FIG. 3, the second gear 42 in some embodiments of the present disclosure is sleeved on the second sub-shaft 21, and the second gear 42 is in clearance fit with the second sub-shaft 21 to facilitate the installation of the second gear 42.

[0089] In some embodiments of the present disclosure, in order to enable the second gear 42 to drive the second sub-shaft 21 to rotate, a first key groove can be arranged on the inner wall of the second gear 42, and a second key groove can be arranged on the outer wall of the second sub-shaft 21. When the second gear 42 is sleeved on the second sub-shaft 21, the first key groove and the second key groove are oppositely arranged. A part of the connecting key 50 is clamped in the first key groove, and another part of the connecting key 50 is clamped in the second key groove, so as to clamp the second gear 42 on the second sub-shaft 21 through the connecting key 50.

[0090] It should be noted that the connecting key 50 in some embodiments of the present disclosure can be a flat key, or can be a connecting key 50 of other structures. The structure of the connecting key 50 is not limited in the present disclosure. In actual application, the structure of the connecting key 50 can be set as needed by the technician.

[0091] In some embodiments, as shown in FIGS. 1 and 2, the first transmission shaft 10 in some embodiments of the present disclosure is adapted to be connected with a driving source, and among the two end portions of the adjacent two segments of the first sub-shaft 11 that are close to each other, one end portion is provided with a first clamping portion, and the other end portion is provided with a second clamping portion, and the first clamping portion is clamped in the second clamping portion.

[0092] As shown in FIGS. 1 and 2, the first transmission shaft 10 in some embodiments of the present disclosure is adapted to be connected with a driving source, that is, the first transmission shaft 10 is a driving shaft. Among the two end portions of the adjacent two segments of the first sub-shaft 11 that are close to each other, a first clamping portion is arranged on the end portion of one first sub-shaft 11, and a second clamping portion is arranged on the end portion of the other first sub-shaft 11, and the first clamping portion is clamped in the second clamping portion, so as to connect the adjacent two segments of the first sub-shaft 11 together.

[0093] The first transmission shaft 10 is a driving shaft, and the driving shaft needs to receive power input. Therefore, the driving shaft has a higher requirement for coaxiality, and the coaxiality of the driving shaft needs to be preferentially ensured. In some embodiments of the present disclosure, the first transmission shaft 10 is arranged to include a plurality of first sub-shafts 11, and the end portions of the adjacent two first sub-shafts 11 that are close to each other are connected by the first clamping portion and the second clamping portion, and the plurality of first sub-shafts 11 are clamped together to form the first transmission shaft 10, so that the space enveloped by the first transmission shaft 10 is smaller, which helps to improve the integration of the first transmission shaft 10.

[0094] In some embodiments, in the case where the first clamping portion is a protrusion, the second clamping portion can be a groove, and the protrusion is clamped in the groove to connect the adjacent two first sub-shafts 11 together. In the case where the first clamping portion is a key groove, the second clamping portion can also be a key groove, and one end of the connecting key is clamped in one of the key grooves, and the other end of the connecting key is clamped in the other key groove, so as to connect the adjacent two first sub-shafts 11 together.

[0095] Of course, the above is only an individual example of the way in which the adjacent two first sub-shafts 11 are connected together, and is not a limitation of the present disclosure. In actual applications, the skilled person can also set the structure of the first clamping portion and the second clamping portion according to the needs.

[0096] In some embodiments, as shown in FIGS. 2 and 4, the first clamping portion in some embodiments of the present disclosure includes a polygonal column 112, and the second clamping portion includes a polygonal groove 111, and the polygonal column 112 is clamped in the polygonal groove.

[0097] In some embodiments of the present disclosure, the first clamping portion is arranged as a polygonal column 112, the second clamping portion is arranged as a polygonal groove 111, and the polygonal column 112 is clamped in the polygonal groove 111 to connect the adjacent two first sub-shafts 11 together.

[0098] In some embodiments of the present disclosure, the polygonal column 112 is clamped in the polygonal groove 111 to connect the adjacent two first sub-shafts 11 together. In some embodiments of the present disclosure, the arrangement of the polygonal column 112 and the polygonal groove 111 can make the transmission between the adjacent two first sub-shafts 11 more stable. In addition, it can also make the first transmission shaft 10 suitable for transmission conditions with large torque and high speed.

[0099] In some embodiments, as shown in FIGS. 1, 2 and 6, the pump structure 100 in some embodiments of the present disclosure further includes a third transmission shaft 60, the third transmission shaft 60 is coaxially arranged with the first transmission shaft 10, and the third transmission shaft 60 is connected to one of the plurality of first sub-shafts 11.

[0100] The pump structure 100 further comprises a second pumping mechanism 30 arranged on the third transmission shaft 60, and the second pumping mechanism 30 is configured to pump the medium from the oil storage component to the component to be lubricated.

[0101] As shown in FIGS. 1 and 2, the pump structure 100 in some embodiments of the present disclosure further comprises a third transmission shaft 60 coaxially arranged with the first transmission shaft 10, and the third transmission shaft 60 is connected to one of the first sub-shafts 11. In some embodiments, the third transmission shaft 60 can be connected to the first sub-shaft 11 at the end. The second pumping mechanism 30 is arranged on the third transmission shaft 60 to pump the medium from the oil storage component to the component to be lubricated by the second pumping mechanism 30.

[0102] With the above arrangement, the oil supply function and the oil return function can be integrated on the pump structure 100 to improve the integration of the pump structure 100. In addition, the third transmission shaft 60 and the first transmission shaft 10 are arranged in a segmented shaft manner, which helps to improve the rigidity and coaxiality of the third transmission shaft 60 and the first transmission shaft 10.

[0103] In some embodiments, as shown in FIGS. 1 and 2, the second pumping mechanism 30 in some embodiments of the present disclosure comprises a third gear arranged on the third transmission shaft 60.

[0104] The second pumping mechanism 30 further comprises an inner ring gear engaged with the third gear.

[0105] As shown in FIGS. 1 and 2, the second pumping mechanism 30 in some embodiments of the present disclosure comprises a third gear and an inner ring gear, the third gear is arranged on the third transmission shaft 60, and the inner ring gear is engaged with the third gear. With the above arrangement, the structure of the pump structure is simple, the volume is small, and the NVH (noise, vibration and harshness) performance of the pump structure is better.

[0106] It should be noted that the third transmission shaft 60 in some embodiments of the present disclosure is adapted to be connected to the driving source. That is, the driving source drives the third transmission shaft 60 to rotate, thereby driving the first transmission shaft 10 to rotate. Connecting the third transmission shaft 60 to the driving source helps to simplify the overall structure of the pump, reduce the volume of the pump structure, and make the NVH (noise, vibration and harshness) performance of the pump structure better.

[0107] In some embodiments, the first pumping mechanism 40 in some embodiments of the present disclosure satisfies at least one of the following: the plurality of first pumping mechanisms 40 comprises at least four first pumping mechanisms 40; or, some of the plurality of first pumping mechanisms 40 are configured to suck the medium from the first oil return component to the oil storage component, and some of the plurality of first pumping mechanisms 40 are configured to suck the medium from the second oil return component to the oil storage component.

[0108] The component to be returned oil in some embodiments of the present disclosure can be a component that is lubricated by the medium and has medium retention, for example, a moving component on an engine block, including but not limited to a crankshaft, a piston, a camshaft, etc. After the lubricating oil as the medium flows through these components, there can be retention, especially for moving components of a horizontally opposed engine, which is difficult to return oil by gravity, and the retention is serious, which needs to be actively pumped.

[0109] The component to be returned oil in some embodiments of the present disclosure can also be a transfer component in the medium circulation flow path, for example, an oil pan of an engine. After part of the lubricating oil as the medium is returned by gravity, it flows back to the oil pan. In the case of limited oil pan volume, the oil pan cannot store more lubricating oil, and therefore, active pumping is needed.

[0110] Taking an engine as an example, the first component to be returned oil in some embodiments of the present disclosure can be various moving components on an engine block, and the second component to be returned oil can be an oil pan of the engine.

[0111] When the engine needs to return oil from multiple locations, at least four pumps can meet the requirements to ensure that each location of the engine block can be returned oil. Therefore, in some embodiments of the present disclosure, the first transmission shaft 10 is provided to include multiple first sub-shafts 11, and at least one first pumping mechanism 40 is arranged on each first sub-shaft 11, so as to reduce the number of first sub-shafts 11, thereby reducing the overall length of the first transmission shaft 10, reducing the coaxiality requirement of the first transmission shaft 10, and ensuring the overall coaxiality of the first transmission shaft 10.

[0112] Of course, the above is only an example of the structure of the component to be returned oil when the pump structure disclosed in some embodiments of the present disclosure is applied to an engine, and does not limit the present disclosure. When the pump structure is applied to other devices, a technician can also set the structure of the component to be returned oil according to needs.

[0113] As shown in FIG. 5, the pump structure 100 in some embodiments of the present disclosure further includes a housing arranged outside the pump structure 100 to protect the pump structure 100. The housing of the pump structure 100 is provided with a first oil inlet 70 and a second oil inlet 71. The engine oil can enter the first oil inlet passage 73 from the first oil inlet 70, and the engine oil can also enter the second oil inlet passage 74 from the second oil inlet 71, and then flow out from the oil outlet 72 after being pressurized by the oil return pump.

[0114] Some embodiments of the present disclosure disclose a pump structure, which comprises a first transmission shaft, the first transmission shaft comprising a plurality of first sub-shafts arranged in sequence along an axial direction of the first transmission shaft. The pump structure further comprises a plurality of first pumping mechanisms for pumping medium from an oil return component to an oil storage component, at least one of the plurality of first pumping mechanisms being arranged on each of the plurality of first sub-shafts.

[0115] In some embodiments of the present disclosure, the first transmission shaft is divided into a plurality of first sub-shafts. When each of the first sub-shafts is machined, the length of each of the first sub-shafts is relatively short compared to the overall length of the first transmission shaft. Therefore, the coaxiality of the first transmission shaft can be better controlled to ensure the overall coaxiality of the first transmission shaft.

[0116] In some embodiments, at least one first pumping mechanism is arranged on each of the first sub-shafts to reduce the number of first sub-shafts and the overall length of the first transmission shaft, thereby reducing the coaxiality requirement of the first transmission shaft and ensuring the overall coaxiality of the first transmission shaft.

[0117] As shown in FIG. 7, some embodiments of the present disclosure further disclose an engine 200 comprising the pump structure described in the above embodiments.

[0118] It should be noted that the engine disclosed in some embodiments of the present disclosure comprises a pump structure having the same structure as the pump structure 100 described in the above embodiments, and has similar beneficial effects. Therefore, no further description is given here.

[0119] It should be noted that the engine disclosed in some embodiments of the present disclosure comprises an oil can, an engine body, an oil pan, and a moving component mounted on the engine body. The oil pan is mounted at the bottom of the engine body, and the oil can is mounted outside the engine body. Some of the plurality of first pumping mechanisms 40 are connected to the moving component to pump medium from the moving component to the oil can, and some of the plurality of first pumping mechanisms 40 are connected to the oil pan to pump medium from the oil pan to the oil can.

[0120] It should be noted that the oil can in some embodiments of the present disclosure can be directly connected to the engine body or connected to other positions on the vehicle. The present disclosure does not limit this.

[0121] As shown in FIG. 8, some embodiments of the present disclosure further provide a drive assembly, which comprises the engine 200 described above.

[0122] It should be noted that the drive assembly in some embodiments of the present disclosure can be a power generation assembly, and when the power generation assembly is applied to a hybrid vehicle, the power generation assembly comprises an engine and a power generator connected to an output end of the engine, and the power generator generates power by using mechanical energy of the engine.

[0123] The drive assembly in some embodiments of the present disclosure can also be the power assembly 300, and when the power assembly 300 is applied to a fuel vehicle or a hybrid vehicle, the output end of the engine is connected to a wheel transmission for driving the vehicle to move forward.

[0124] As shown in FIGS. 9A and 9B, some embodiments of the present disclosure also provide a vehicle 1000, which comprises the power assembly 300 described in the above embodiments.

[0125] It should be noted that in some embodiments of the present disclosure, the vehicle 1000 comprises a power assembly having the same structure as the power assembly 300 described in the above embodiments, and has similar beneficial effects, which will not be described here again.

[0126] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be mutually referred to.

[0127] Although alternative embodiments of some embodiments of the present disclosure have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to cover all alternative embodiments and all changes and modifications falling within the scope of some embodiments of the present disclosure.

[0128] Finally, it should be noted that in this document, relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply that there is any such actual relationship or order between the entities. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the article or terminal device including the element.

[0129] The technical solutions provided by the present disclosure are described in detail above, and the principles and implementation manners of the present disclosure are described by using examples. For those skilled in the art, the principles and implementation manners of the present disclosure can be changed in specific implementation manners and application ranges. Therefore, the content of the present disclosure should not be understood as a limitation.

Claims

1. A pump structure (100) comprising: a first drive shaft (10) comprising a plurality of first sub-shafts (11) arranged in sequence along an axial direction of the first drive shaft (10); and a plurality of first pumping mechanisms (40) configured to pump a medium from an oil pick-up component to an oil storage component; wherein each of the plurality of first sub-shafts (11) is provided with at least one of the plurality of first pumping mechanisms (40). 2.The pump structure (100) of claim 1, further comprising: a second drive shaft (20) spaced apart from the first drive shaft (10); wherein each of the plurality of first pumping mechanisms (40) comprises: a first gear (41) provided on the plurality of first sub-shafts (11); and at least one second gear (42) provided on the second drive shaft (20) and engaged with the first gear (41) to pump the medium. The second drive shaft (20) comprises a plurality of second sub-shafts (21) arranged in sequence along an axial direction of the second drive shaft (20); and each of the plurality of second sub-shafts (21) is provided with the at least one second gear (42).

3. The pump structure (100) according to claim 2, wherein 4.The pump structure (100) of claim 3, wherein: the at least one second gear (42) comprises a plurality of second gears (42); and each of the plurality of second gears (42) is provided on at least one of the plurality of second sub-shafts (21). The plurality of first sub-shafts (11) and the plurality of second sub-shafts (21) are correspondingly arranged, and the first gear (41) on one of the plurality of first sub-shafts (11) and the at least one second gear (42) on the corresponding second sub-shaft (21) are engaged to pump the medium. The at least one of the plurality of first sub-shafts (11) is provided with the plurality of first pumping mechanisms (40).

5. The pump structure (100) according to any one of claims 2 to 4, wherein The first drive shaft (10) is a driven shaft, and the second drive shaft (20) is a driving shaft.

6. The pump structure (100) according to any one of claims 2 to 5, wherein The first drive shaft (10) is a driving shaft, and the second drive shaft (20) is a driven shaft.

7. The pump structure (100) according to any one of claims 2 to 5, wherein 8.The pump structure (100) of claim 7, wherein: the second drive shaft (20) comprises a plurality of second sub-shafts (21) arranged in sequence along an axial direction of the second drive shaft (20), and each of the plurality of second sub-shafts (21) is provided with the at least one second gear (42); and the plurality of first sub-shafts (11) are connected in sequence along an axial direction of the first drive shaft (10), and the plurality of second sub-shafts (21) are spaced apart in sequence along an axial direction of the second drive shaft (20). The first gear (41) and the plurality of first sub-shafts (11) are interference fit.

9. The pump structure (100) according to claim 8, wherein ​ 10. The pump structure (100) according to claim 8 or 9, wherein the at least one second gear (42) and the multi-segment second sub-shaft (21) are clearance fit, or the at least one second gear (42) is loose on the multi-segment second sub-shaft (21).

11. The pump structure (100) according to claim 8, wherein the at least one second gear (42) and the multi-segment second sub-shaft (21) are clearance fit, the at least one second gear (42) is provided with a first key groove, the multi-segment second sub-shaft is provided with a second key groove, the second key groove is oppositely arranged with the first key groove; the pump structure (100) further comprises a connecting key (50), the connecting key (50) is clamped in the first key groove and the second key groove.

12. The pump structure (100) according to any one of claims 1 to 11, wherein the first transmission shaft (10) is adapted to be connected with a driving source, adjacent two of the multi-segment first sub-shaft (11) are provided with a first clamping portion and a second clamping portion at two ends close to each other.

13. The pump structure (100) according to claim 12, wherein the first clamping portion comprises a polygonal column, the second clamping portion comprises a polygonal groove, and the polygonal column is clamped in the polygonal groove.

14. The pump structure (100) according to any one of claims 1 to 13, further comprising: a third transmission shaft (60), the third transmission shaft (60) is coaxially arranged with the first transmission shaft (10), and the third transmission shaft (60) is connected to one of the plurality of first sub-shafts (11); and a second pumping mechanism (30), the second pumping mechanism (30) is arranged on the third transmission shaft (60), and the second pumping mechanism (30) is configured to pump the medium from the oil storage component to the component to be lubricated.

15. The pump structure (100) according to claim 14, wherein the second pumping mechanism (30) comprises: a third gear arranged on the third transmission shaft (60); and an inner gear ring engaged with the third gear.

16. The pump structure (100) according to claim 14, wherein the third transmission shaft (60) is adapted to be connected with a driving source.

17. The pump structure (100) according to any one of claims 1 to 16, wherein the plurality of first pumping mechanisms (40) satisfy at least one of the following: the plurality of first pumping mechanisms (40) comprises at least four first pumping mechanisms (40); or part of the plurality of first pumping mechanisms (40) is configured to suck the medium from a first component to be returned to the oil storage component, and part of the plurality of first pumping mechanisms (40) is configured to suck the medium from a second component to be returned to the oil storage component.

18. An engine (200) comprising the pump structure (100) according to any one of claims 1 to 17.

19. The engine (200) according to claim 18, comprising an oil pot, an engine body, an oil pan and a moving component mounted on the engine body, the oil pan is mounted at the bottom of the engine body, and the oil pot is mounted outside the engine body. Some of the plurality of first pumping mechanisms (40) are connected to the moving component to draw the medium from the moving component to the oil can, and some of the plurality of first pumping mechanisms (40) are connected to the oil sump to draw the medium from the oil sump to the oil can.

20. A powertrain (300) comprising the engine (200) according to claim 18 or 19.

21. A vehicle (1000) comprising the engine (200) according to claim 18 or 19, or the powertrain (300) according to claim 20.

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