CN219204326U

CN219204326U - Electronic oil pump

Info

Publication number: CN219204326U
Application number: CN202320196783.XU
Authority: CN
Inventors: 阳熵铖; 许仲秋; 黄金辉; 谭小龙
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Meihu Intelligent Manufacturing Co.,Ltd.
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-06-16
Anticipated expiration: 2033-02-13

Abstract

The electronic oil pump comprises a motor shell, a transmission shaft, a stator assembly, a motor rotor, an inner rotor, an outer rotor, a pump cover, a circuit board assembly and a motor rear cover in interference fit with the motor shell, wherein the motor shell is connected with the pump cover through an inner spigot and an outer spigot, a positioning pin hole I is formed in the pump cover, a positioning pin hole II corresponding to the positioning pin hole I is formed in the motor shell, and the positioning pin hole I is fixedly connected with the positioning pin hole II through a positioning pin; therefore, the technical problems of mechanical engagement transmission noise of the oil pump rotor, harmonic noise caused by the fact that a wind mill of a motor and front and rear bearings are not concentric and the like can be solved.

Description

Electronic oil pump

Technical Field

The utility model relates to the technical field of automobiles, in particular to an electronic oil pump.

Background

Under the promotion of the national policy of carbon neutralization, new energy electric vehicles are rapidly developed. The rotating speed of the front and rear main driving motors of the electric passenger car can reach ten thousand and six thousand revolutions, and the temperature of the stator and rotor components of the main driving motors is suddenly increased. The main driving motor in the current mainstream adopts an oil cooling motor, and an electronic oil pump is required to provide 16L/min flow to rapidly take away heat, so that the stator and rotor assembly is rapidly cooled in a short time. The oil cooling system extracts oil from the transmission, and the oil is cooled by the oil cooler and then is injected into the stator and the rotor of the motor for cooling. The electric vehicle has high requirements on current limitation and power consumption, requires the displacement of an oil pump to be as low as possible, and ensures the rotation speed of a motor to be as high as possible.

The design displacement of the current oil pump is 2.924cc/r, and the working speed of the motor can reach 6500rpm. Thus, the torque demand of the oil pump is reduced from the source, and the current and the power can meet the design requirements. The electric vehicle is not provided with an engine, so that the electric vehicle is completely driven by a motor, the overall noise is low, and the noise of an electronic oil pump is required to be matched with the electric vehicle. Thus, the following noise problems exist:

1. mechanical engagement transmission noise of the oil pump rotor;

2. harmonic noise caused by the fact that a wind mill of a motor and front and rear bearings are not concentric;

3. fluid noise caused by the flow passage of the rotor cavity of the oil pump;

4. parts involve moving parts to be deburred and cleanliness controlled.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an electronic oil pump.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides an electronic oil pump, includes motor casing, sets up transmission shaft, stator module, motor rotor in the motor casing, inner rotor, outer rotor, pump cover, circuit board subassembly, with motor casing interference fit's motor back lid, wherein, the pump cover with connect through inside and outside tang between the motor casing, be equipped with location pinhole I on the pump cover, be equipped with on the motor casing with location pinhole II corresponding to location pinhole I, location pinhole I with location pinhole II passes through locating pin fixed connection.

In one embodiment, the pump cover is provided with an oil suction area and a pressure oil area.

In one embodiment, the oil pressing area is provided with an oil guiding groove communicated with the oil absorbing area.

In one embodiment, the oil suction area and the oil pressing area are arranged correspondingly at the center of the pump cover.

In one embodiment, an extension block extends on one side of the pressure oil area and the pump cover.

In one embodiment, the extension block extends from one side of the plenum to the pump cover to the center of the plenum edge.

Compared with the prior art, the utility model has the following beneficial effects:

the motor comprises a transmission shaft, a stator assembly, a motor rotor, an inner rotor, an outer rotor, a pump cover, a circuit board assembly and a motor rear cover which are in interference fit with a motor shell, wherein the pump cover is connected with the motor shell through an inner spigot and an outer spigot, a positioning pin hole I is formed in the pump cover, a positioning pin hole II corresponding to the positioning pin hole I is formed in the motor shell, and the positioning pin hole I is fixedly connected with the positioning pin hole II through a positioning pin; therefore, the technical problems of mechanical engagement transmission noise of the oil pump rotor, harmonic noise caused by the fact that a wind mill of a motor and front and rear bearings are not concentric and the like can be solved.

Drawings

FIG. 1 is a schematic cross-sectional view of embodiment 1 of the present utility model;

fig. 2 is a schematic diagram of the pump cover of fig. 1 according to the present utility model.

In the figure: 10. the motor comprises a motor shell, 15, a transmission shaft, 20, a stator assembly, 25, a motor rotor, 30, an inner rotor, 35, an outer rotor, 40, a pump cover, 41, a positioning pin hole I, 42, a positioning pin hole II, 43, a positioning pin, 45, a motor rear cover, 46, an oil absorption area, 47, an oil pressing area, 48, an oil guiding groove, 49, an extension block, 50 and a circuit board assembly.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Example 1

As shown in fig. 1-2, the embodiment comprises a motor housing 10, a transmission shaft 15 arranged in the motor housing 10, a stator assembly 20, a motor rotor 25, an inner rotor 30, an outer rotor 35, a pump cover 40, a circuit board assembly 50, and a motor rear cover 45 in interference fit with the motor housing 10; when the electronic oil pump works, the circuit board assembly 50 controls the stator assembly 20 to generate a changed excitation magnetic field by controlling the current of the stator assembly 20 to change according to a certain rule, the motor rotor 25 rotates under the action of the excitation magnetic field, and the motor rotor 25 drives the inner rotor 30 and the outer rotor 35 to rotate through the transmission shaft 15, so that a working medium is extruded out of the oil outlet to generate flowing power.

Wherein, through the interference fit of motor casing 10 and motor back cover 45 for concentricity of bearing hole and rear end via hole in the motor back cover 45 and excircle tang reduces the noise that the harmonic vibration of transmission shaft 15 produced.

The pump cover 40 is connected with the motor shell 10 through an inner spigot and an outer spigot, a positioning pin hole I41 is formed in the pump cover 40, a positioning pin hole II 42 corresponding to the positioning pin hole I41 is formed in the motor shell 10, and the positioning pin hole I41 is fixedly connected with the positioning pin hole II 42 through a positioning pin 43; thereby ensuring a meshing gap of the inner rotor 30 and the outer rotor 35, and a side gap of the outer rotor 35 and the rotor chamber; thereby reducing noise.

The pump cover 40 is provided with an oil suction area 46 and a pressure oil area 47, the pressure oil area 47 is provided with an oil guiding groove 48 communicated with the oil suction area 46, the oil suction area 46 and the pressure oil area 47 are correspondingly arranged at the center of the pump cover 40, one side of the pressure oil area 47 and the pump cover 40 are extended with extension blocks 49, and the extension blocks 49 extend from one side of the pressure oil area 47 and the pump cover 40 to the center of the edge of the pressure oil area 47.

In the embodiment, the Bernoulli equation is applied to the oil outlet channel of the electronic oil pump, so that the uniform outlet flow speed can be ensured, and the fluid noise caused by pressure pulsation can be reduced.

In this embodiment, the rotor cavity oil duct blank of electronic oil pump increases burring chamfer to increase cleanliness control, make end face clearance and backlash enlarge, avoid impurity foreign matter to cause the unusual wearing and tearing of oil pump, produce the noise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the technical solution of the present utility model has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solution described in the foregoing embodiments may be modified or some of the technical features thereof may be equally substituted; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An electronic oil pump, characterized in that: including motor housing (10), set up transmission shaft (15), stator module (20), motor rotor (25) in motor housing (10), inner rotor (30), outer rotor (35), pump cover (40), circuit board subassembly (50), with motor housing (10) interference fit's motor back lid (45), wherein, pump cover (40) with be connected through inside and outside tang between motor housing (10), be equipped with location pinhole I (41) on pump cover (40), be equipped with on motor housing (10) with location pinhole II (42) corresponding to location pinhole I (41), location pinhole I (41) with location pinhole II (42) pass through locating pin (43) fixed connection.

2. The electronic oil pump of claim 1, wherein: an oil suction area (46) and an oil pressing area (47) are arranged on the pump cover (40).

3. The electronic oil pump of claim 2, wherein: an oil guiding groove (48) communicated with the oil absorbing area (46) is arranged on the oil pressing area (47).

4. An electronic oil pump according to claim 3, characterized in that: the oil suction area (46) and the pressure oil area (47) are correspondingly arranged at the center of the pump cover (40).

5. The electronic oil pump of claim 4, wherein: an extension block (49) extends on one side of the pressure oil area (47) and the pump cover (40).

6. The electronic oil pump of claim 5, wherein: the extension block (49) extends from one side of the pressure oil area (47) to the center of the edge of the pressure oil area (47) on the pump cover (40).