Electrically driven active oil supply and return integrated multi-oil pump

Abstract

The utility model relates to oil pump technical field provides a kind of electric initiative oil supply and return integrated multi-connected oil pump, cooperate with engine lubrication system and work, including shell, drive mechanism, oil supply pump and oil return pump, the inside of shell is formed with oil supply chamber and oil return chamber, drive mechanism, oil supply pump and oil return pump share same drive shaft, drive shaft is rotatably connected with shell and keeps sealed;First oil outlet and first oil inlet are equipped on shell, and first oil outlet and first oil inlet are communicated with oil supply chamber;Second oil outlet and at least two second oil inlets are further equipped on shell, and at least two second oil inlets are evenly arranged along the annular direction of oil return pump, and second oil inlet and first oil inlet are communicated with oil return chamber;Drive mechanism is used to control drive shaft rotation;Oil supply pump is fixedly installed in oil supply chamber, for actively pumping oil for engine lubrication system;Oil return pump is fixedly installed in oil return chamber, for actively returning oil for engine lubrication system.

Description

Technical Field

[0001] This utility model relates to the field of oil pump technology, specifically to an electric active oil supply and return integrated multi-unit oil pump. Background Technology

[0002] The oil pump is the power source of the engine lubrication system. Its core function is to pressurize the oil and deliver it to the surfaces of various moving parts of the engine, while simultaneously recycling the used oil to ensure the normal operation of the engine. In existing technology, the oil supply pump and return pump of the engine lubrication system are mostly designed separately, with independent arrangement and each equipped with an independent drive shaft. For example, the oil supply pump relies on the engine's mechanical transmission, while the return pump has a separate drive mechanism, failing to achieve "integrated oil supply and return".

[0003] This split design has several drawbacks: First, the two independent mechanisms require separate drive shafts and mounting bases, which not only occupies a significant amount of space in the engine compartment but also increases the costs of parts procurement, assembly, and subsequent maintenance. Furthermore, the two drive mechanisms require an additional synchronization and coordination mechanism, and mismatches in synchronization can easily lead to a mismatch between oil supply pressure and return rate, causing oil stagnation or insufficient lubrication, thus reducing system reliability. Second, existing technologies often employ single-function pump combinations or multi-pump designs of a single pump type, which cannot simultaneously meet the differentiated performance requirements of the oil supply pump ("low pulsation, high pressure") and the return pump ("high oil suction efficiency, multi-channel adaptability"). Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an electric active oil supply and return integrated multi-unit oil pump that integrates oil supply and return, solving the problems of large space occupation, high cost, and insufficient reliability of split designs. At the same time, it takes into account the differentiated needs of oil supply and return, adapts to complex working conditions, and improves installation flexibility.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an electric active oil supply and return integrated multi-unit oil pump, which works in conjunction with the engine lubrication system, includes a housing, a drive mechanism, an oil supply pump and an oil return pump. The housing has an oil supply chamber and an oil return chamber formed inside. The drive mechanism, the oil supply pump and the oil return pump share the same drive shaft. The drive shaft is rotatably connected to the housing and remains sealed. The housing is provided with a first oil outlet and a first oil inlet, both of which are connected to the oil supply chamber. The housing is also provided with a second oil outlet and at least two second oil inlets. The at least two second oil inlets are evenly arranged along the circumference of the return oil pump. Both the second oil inlets and the first oil inlet are connected to the return oil chamber. The drive mechanism is used to control the rotation of the drive shaft; The oil supply pump is fixedly installed in the oil supply chamber and is used to actively pump oil for the engine lubrication system. The return oil pump is fixedly installed in the return oil chamber and is used to actively return oil to the engine lubrication system.

[0006] Furthermore, the oil supply pump is a cycloidal rotor pump, and the first oil outlet and the first oil inlet are located on both sides of the oil supply chamber, and there is one of each.

[0007] Furthermore, there are two oil return chambers, each corresponding to four second oil inlets, and each oil return chamber is equipped with an oil return pump. The two oil return chambers share one second oil outlet.

[0008] Furthermore, a partition is provided between the two oil return chambers, and the partition is sealed to the inner wall of the housing.

[0009] Furthermore, the return oil pump includes a drive gear and two driven shafts. The drive gear is fixedly mounted on the drive shaft, and the two driven shafts are respectively arranged on both sides of the drive shaft and are rotatably connected to the inner wall of the return oil chamber. A driven gear is fixedly mounted on the driven shaft, and the driven gear meshes with the drive gear.

[0010] Furthermore, the inner rotor of the oil supply pump has multiple first hollow holes.

[0011] Furthermore, the drive gear has multiple second hollow holes.

[0012] Furthermore, the driving mechanism is a motor.

[0013] The beneficial effects of this utility model are as follows: This utility model provides an electric active oil supply and return integrated multi-unit oil pump, which integrates the oil supply pump, oil return pump and drive mechanism into the same housing and shares the same drive shaft. This eliminates the two independent drive mechanisms and redundant installation space of the traditional split design, significantly reducing the overall size, the number of parts, and the assembly and subsequent maintenance costs. At the same time, the same drive shaft ensures the natural synchronization of the oil supply pump and the oil return pump, avoiding the problem of mismatch between oil supply pressure and oil return rate caused by asynchronous drive in the traditional design, and significantly improving the reliability of system operation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention from a first perspective. Figure 2 This is a three-dimensional structural diagram of the present invention from a second perspective; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the oil return chamber; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the oil supply chamber; Figure 5 This is a three-dimensional structural diagram of the drive shaft.

[0015] Reference numerals: 11-Oil supply chamber, 12-Oil return chamber, 13-First oil inlet, 14-First oil outlet, 15-Second oil inlet, 16-Second oil outlet, 20-Drive mechanism, 30-Oil supply pump, 31-Inner rotor, 32-First hollow hole, 40-Oil return pump, 41-Drive gear, 42-Driven shaft, 43-Driven gear, 44-Second hollow hole, 50-Drive shaft, 60-Connecting rod bolt. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] In this application, unless otherwise expressly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] In the description of this application, it should be understood that the terms "longitudinal", "horizontal", "level", "top", "bottom", "upper", "lower", "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0020] like Figures 1-5 As shown, this utility model provides an electric active oil supply and return integrated multi-unit oil pump that works in conjunction with the engine lubrication system. It includes a housing, a drive mechanism 20, an oil supply pump 30, and two oil return pumps 40. The housing is preferably made of one-piece die-cast aluminum alloy, combining lightweight design with structural strength.

[0021] The drive mechanism 20, the oil supply pump 30, and the return pump 40 share the same drive shaft 50. The drive shaft 50 is rotatably connected to the housing and remains sealed. The drive shaft 50 is made of alloy steel and its surface is heat-treated by quenching to improve wear resistance and transmission stability.

[0022] The interior of the casing is divided into one oil supply chamber 11 and two oil return chambers 12. The two oil return chambers 12 are symmetrically distributed on the same side of the oil supply chamber 11. The oil supply chamber 11 and the oil return chambers 12 are isolated from each other by the casing structure itself to ensure that the oil circuits do not interfere with each other. A partition is provided between the two oil return chambers 12, and the partition is sealed to the inner wall of the casing.

[0023] The oil supply pump 30 is a cycloidal rotor pump, which is fixedly installed in the oil supply chamber 11. Its outer rotor is interference-fitted with the inner wall of the oil supply chamber 11, and its inner rotor 31 is keyed to the drive shaft 50. Multiple first hollow holes 32 are evenly opened on the inner rotor 31 to achieve weight reduction. The first oil inlet 13 and the first oil outlet 14 are located on both sides of the housing.

[0024] Two return oil pumps 40 are respectively installed in two return oil chambers 12. Each set of return oil pumps 40 includes a driving gear 41, two driven shafts 42, and two driven gears 43. The driving gear 41 is fixedly mounted on the drive shaft 50. The two driven shafts 42 are symmetrically arranged on both sides of the drive shaft 50, and both ends of the driven shafts 42 are rotatably connected to the inner wall of the return oil chamber 12. The driven gears 43 are fixedly mounted on the driven shafts 42 and mesh with the driving gear 41. Multiple second hollow holes 44 are evenly opened on the driving gear 41 to optimize weight distribution.

[0025] Eight second oil inlets 15 are evenly arranged circumferentially along the return oil pump 40 on the housing, with four second oil inlets 15 corresponding to each return oil chamber 12. The eight second oil inlets 15 are connected to the return oil channels of different parts of the engine, such as the cylinder head, crankcase, and camshaft cover, via oil pipes. Two return oil chambers 12 share a single second oil outlet 16, which is located on one side of the housing and connected to the oil pan via an oil pipe. An internal common oil outlet channel is machined inside the housing corresponding to the oil outlet ends of the two return oil chambers 12. This channel connects to the oil outlet sides of both return oil pumps 40, allowing the collected oil to be discharged from the second oil outlet 16.

[0026] The drive mechanism 20 is preferably an electric motor, whose power output end is connected to the drive shaft 50 via a coupling. The motor's power signal line interface is connected to the vehicle control system via a power signal line, enabling functions such as start, stop, and speed regulation. Alternatively, the motor can be replaced with a mechanical transmission joint, connecting to the engine crankshaft via gears or a chain to achieve mechanical power input. The oil supply pump 30, return pump 40, and motor are all fixed to the housing via connecting rod bolts 60.

[0027] The working process of this embodiment is as follows: When the engine starts, the vehicle control system starts the motor through the power signal line. The motor drives the drive shaft 50 to rotate. The drive shaft 50 synchronously drives the inner rotor 31 of the oil supply pump 30 and the drive gear 41 of the two return oil pumps 40 to rotate.

[0028] On the oil supply pump 30 side: the inner rotor 31 rotates with the drive shaft 50 and cooperates with the outer rotor to form a volume change, generating negative pressure at the first oil inlet 13, which draws the oil into the oil supply chamber 11. After being pressurized by the cycloidal rotor, the oil is discharged from the first oil outlet 14 to the main lubrication oil circuit of the engine, providing lubrication for the various moving parts of the engine.

[0029] On the oil return pump 40 side: the driving gear 41 drives the driven gears 43 on both sides to rotate, forming a suction force in the oil return chamber 12. The engine oil used in various parts of the engine enters the eight second oil inlets 15 through the corresponding oil return channels, and flows into two independent oil return chambers 12 (isolated by partitions so that the oil does not mix). After being pressurized by the gear set of the oil return pump 40, it is collected through the built-in common oil outlet channel inside the housing and finally flows back to the oil pan from the second oil outlet 16, completing the oil supply and return cycle.

[0030] In actual operation, this multi-stage oil pump can adapt to a variety of complex working conditions: the oil supply pump 30 always maintains a stable oil supply, the two return oil pumps 40 can cope with the situation where any number of second oil inlets 15 are sucked into the air, and due to the separation effect of the baffle, oils with different gas contents will not mix, which can stably adapt to the return oil conditions with different gas contents and ensure the continuous and reliable operation of the engine lubrication system.

[0031] This utility model integrates the oil supply pump 30, the return oil pump 40, and the drive mechanism 20 into the same housing, sharing the same drive shaft 50. This eliminates the need for two separate drive mechanisms 20 and redundant installation space in the traditional split design, significantly reducing the overall size, the number of parts, and the assembly and subsequent maintenance costs. At the same time, the shared drive shaft 50 ensures the natural synchronization of the oil supply pump 30 and the return oil pump 40, avoiding the mismatch between oil supply pressure and return rate caused by asynchronous drives in the traditional design, and significantly improving the reliability of system operation.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric, active, integrated multi-unit oil pump for use in conjunction with an engine lubrication system, characterized in that: It includes a housing, a drive mechanism, an oil supply pump, and a return oil pump. The housing has an oil supply chamber and a return oil chamber. The drive mechanism, the oil supply pump, and the return oil pump share the same drive shaft. The drive shaft is rotatably connected to the housing and remains sealed. The housing is provided with a first oil outlet and a first oil inlet, both of which are connected to the oil supply chamber. The housing is also provided with a second oil outlet and at least two second oil inlets. The at least two second oil inlets are evenly arranged along the circumference of the return oil pump. Both the second oil inlets and the first oil inlet are connected to the return oil chamber. The drive mechanism is used to control the rotation of the drive shaft; The oil supply pump is fixedly installed in the oil supply chamber and is used to actively pump oil for the engine lubrication system. The return oil pump is fixedly installed in the return oil chamber and is used to actively return oil to the engine lubrication system.

2. The electric active oil supply and return integrated multi-unit oil pump according to claim 1, characterized in that: The oil supply pump is a cycloidal rotor pump, and the first oil outlet and the first oil inlet are located on both sides of the oil supply chamber, and there is one of each.

3. The electric active oil supply and return integrated multi-unit oil pump according to claim 1, characterized in that: There are two oil return chambers, each corresponding to four second oil inlets. Each oil return chamber is equipped with an oil return pump, and the two oil return chambers share one second oil outlet.

4. The electric active oil supply and return integrated multi-unit oil pump according to claim 3, characterized in that: A partition is provided between the two oil return chambers, and the partition is sealed to the inner wall of the housing.

5. The electric active oil supply and return integrated multi-unit oil pump according to claim 3, characterized in that: The return oil pump includes a drive gear and two driven shafts. The drive gear is fixedly mounted on the drive shaft. The two driven shafts are respectively located on both sides of the drive shaft and are rotatably connected to the inner wall of the return oil chamber. A driven gear is fixedly mounted on each driven shaft, and the driven gear meshes with the drive gear.

6. The electric active oil supply and return integrated multi-unit oil pump according to claim 5, characterized in that: The inner rotor of the oil pump has multiple first hollow holes.

7. The electric active oil supply and return integrated multi-unit oil pump according to claim 5, characterized in that: The drive gear has multiple second hollow holes.

8. The electric active oil supply and return integrated multi-unit oil pump according to claim 1, characterized in that: The drive mechanism is a motor.

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