CN219513876U - Electronic oil pump and gearbox comprising same - Google Patents

Abstract

The utility model discloses an electronic oil pump, which comprises a controller component, a pump component and a motor component which are sequentially connected along the axial direction, wherein the controller component is used for controlling the motor component; the pump assembly is used for supplying oil to the gearbox and comprises a bearing cover plate and a pump housing, the bearing cover plate and the pump housing form a pump content cavity, the pump content cavity is used for accommodating the pump stator and the pump rotor, and the bearing cover plate is used for supporting the pump stator and the pump rotor; the motor assembly is used for driving the pump assembly and comprises a motor shell and a motor shaft, the motor shaft is in clearance fit with the bearing cover plate, the bearing cover plate and the motor shell form a motor accommodating cavity, and the motor accommodating cavity is used for accommodating a motor stator and a motor rotor; and a circumferential sealing ring is connected between the motor stator and the bearing cover plate and is used for sealing the bearing cover plate and the motor stator. By adopting the technical scheme, the electronic oil pump can be sealed, so that pressure leakage is not generated. The utility model also discloses a gearbox.

Description

Electronic oil pump and gearbox comprising same

Technical Field

The utility model relates to the technical field of vehicle parts, in particular to an electronic oil pump and a gearbox comprising the electronic oil pump.

Background

The electronic oil pump mainly provides a power source for a lubrication system and/or a cooling system of a vehicle, is an indispensable key part, and is increasingly widely applied due to the advantages of long service life of the electronic oil pump, pumping on demand through speed regulation, fault code interaction with a whole vehicle controller, convenience in control and the like.

The electronic oil pump generally comprises a pump body, a motor for driving the pump body to pump fluid medium, and a controller for controlling the operation of the motor. The inner cavity of the pump body is divided into a high-pressure cavity and a low-pressure cavity by the arranged working part, an inlet interface and an outlet interface for fluid medium are formed on the pump housing, the high-pressure cavity is communicated with the outlet interface, and the low-pressure cavity is communicated with the inlet interface.

How to realize the sealing of the electronic oil pump, so that the electronic oil pump does not generate pressure leakage, and ensuring the formation of high-pressure oil output is a technical problem to be considered in the design process of the electronic oil pump.

Disclosure of Invention

The utility model aims to solve the technical problem that the electronic oil pump generates pressure leakage due to poor sealing property. The utility model provides an electronic oil pump and a gearbox comprising the electronic oil pump, which can realize the sealing of the electronic oil pump, prevent the electronic oil pump from generating pressure leakage and ensure the formation of high-pressure oil output.

In order to solve the technical problems, the embodiment of the utility model discloses an electronic oil pump, which comprises a controller component, a pump component and a motor component which are sequentially connected along the axial direction, wherein the controller component is used for controlling the motor component; the pump assembly is used for supplying oil to the gearbox and comprises a bearing cover plate and a pump housing, the bearing cover plate and the pump housing form a pump content cavity, the pump content cavity is used for accommodating the pump stator and the pump rotor, and the bearing cover plate is used for supporting the pump stator and the pump rotor; the motor assembly is used for driving the pump assembly and comprises a motor shell and a motor shaft, the motor shaft is in clearance fit with the bearing cover plate, the bearing cover plate and the motor shell form a motor accommodating cavity, and the motor accommodating cavity is used for accommodating a motor stator and a motor rotor; and a circumferential sealing ring is connected between the motor stator and the bearing cover plate and is used for sealing the bearing cover plate and the motor stator.

By adopting the technical scheme, the electronic oil pump can be sealed, so that the electronic oil pump does not generate pressure leakage, and high-pressure oil output is ensured.

According to another embodiment of the present utility model, a bearing cover plate is disclosed having a first end face extending radially and axially toward a motor stator and a second end face extending axially and radially toward the motor stator.

According to another embodiment of the utility model, the first end face or the second end face is provided with a circumferential sealing ring, and the circumferential sealing ring is tightly contacted with the end face of the motor stator.

According to another embodiment of the utility model, the first end face or the second end face is provided with a circumferential groove, and a circumferential sealing ring is accommodated in the circumferential groove.

According to another embodiment of the present utility model, an embodiment of the present utility model discloses that the circumferential seal ring is an O-ring.

According to another embodiment of the utility model, the motor shaft is connected with the pump assembly at one end and is arranged towards the bottom surface of the motor shell at the other end, and the bottom surface of the motor shell is not provided with a through hole.

According to another embodiment of the utility model, a slot is arranged on one side of the motor shell and is used for clamping a plug connector, the plug connector is used for fixedly connecting a wiring terminal, one end of the wiring terminal extends out of the motor shell and is connected with a PCB of the controller assembly, and the other end of the wiring terminal is connected with a motor stator.

According to another embodiment of the utility model, the joint of the plug connector and the slot is provided with sealant, and the sealant is used for sealing a gap between the plug connector and the motor shell.

According to another embodiment of the present utility model, a method for fixedly connecting a plug member to a fixed terminal includes plugging, welding or screwing.

The embodiment of the utility model also discloses a gearbox, which comprises the electronic oil pump in any embodiment.

Drawings

Fig. 1 shows a perspective view of an electronic oil pump in the present utility model;

FIG. 2 shows a cross-sectional view of an electronic oil pump in one embodiment of the utility model;

fig. 3 shows a cross-sectional view of an electronic oil pump in another embodiment of the utility model;

FIG. 4 illustrates a first path of oil leakage;

FIG. 5 illustrates a second path of oil leakage;

fig. 6 shows a third path of oil-liquid leakage.

Reference numerals illustrate:

an electronic oil pump 00, a controller assembly 10, a pump assembly 20, a motor assembly 30,

bearing cover plate 21, pump shell 22, pump cavity 23, pump stator 24, pump rotor 25, oil inlet 26, oil outlet 27,

a motor housing 31, a motor shaft 32, a motor housing 33, a motor stator 34, a motor rotor 35,

the sealing ring 40 is provided with a sealing ring,

the first end surface 211, the second end surface 212, the bottom surface 311, the plug connector 36 and the wiring terminal 11.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, some embodiments of the present utility model provide an electronic oil pump 00 including a controller assembly 10, a pump assembly 20, and a motor assembly 30 sequentially connected in an axial direction (AX direction as shown in fig. 1 or 2), the controller assembly 10 being configured to control the motor assembly 30; the pump assembly 20 is used to supply oil to the transmission, and the motor assembly 30 is used to drive the pump assembly 20 to draw oil from a tank (not shown) of the transmission for internal gear lubrication and to circulate cooling of the electronic oil pump.

With continued reference to fig. 2, the pump assembly 20 includes a bearing cover 21 and a pump housing 22, the bearing cover 21 and the pump housing 22 forming a pump cavity 23, the pump cavity 23 for housing a pump stator 24 and a pump rotor 25, and the bearing cover 21 for supporting the pump stator 24 and the pump rotor 25.

The pump content chamber 23 includes a high-pressure chamber (not shown) and a low-pressure chamber (not shown), and in connection with fig. 1, an oil inlet 26 for the entry of oil and an oil outlet 27 for the output of oil are formed in the pump housing 22, the oil inlet 26 being connected to the low-pressure chamber, and the oil outlet 27 being in communication with the high-pressure chamber. By the rotational movement of the motor assembly 30, the volume of the cavity formed by the pump stator 24, the pump rotor 25, and its internal impeller (not shown) is gradually changed to generate a high pressure oil output.

The motor assembly 30 includes a motor housing 31 and a motor shaft 32, the motor shaft 32 is in clearance fit with the bearing cover 21, and the bearing cover 21 and the motor housing 31 form a motor cavity 33, the motor cavity 33 being for housing a motor stator 34 and a motor rotor 35. The motor rotor 35 is interference fit with the motor shaft 32, one end of the motor shaft 32 extends into the pump assembly 20, and the pump rotor 25 is interference fit with the motor shaft 32. A circumferential sealing ring 40 is connected between the motor stator 34 and the bearing cover plate 21, and the circumferential sealing ring 40 is used for sealing the bearing cover plate 21 and the motor stator 34.

Because the tolerance of the motor stator 34 is larger due to the injection molding structure, the motor stator is not suitable for being directly assembled with the bearing cover plate 21 as an assembly surface, and in the assembly process, the bearing cover plate 21 is often directly assembled with the motor shell 31, so that a gap is formed between the bearing cover plate 21 and the motor stator 34, and leakage is caused.

Referring to fig. 4, the dashed line with the arrow in the drawing shows the first path of oil leakage, and due to the existence of the gap between the bearing cover plate 21 and the motor stator 34, a small portion of the oil flows from the low-pressure cavity toward the motor assembly 30 along the axial direction (AX direction as shown in fig. 4) along the motor shaft 32, and after flowing into the motor accommodating cavity 33 of the motor assembly 30, the oil moves along the gap between the motor stator 34 and the bearing cover plate 21 along the radial direction toward the motor housing 31, and finally flows out from the contact surface of the pump housing 22 and the motor housing 31, which is the first path of oil leakage. Once the oil flows to the external space, the high-pressure cavity is not completely sealed, and the electronic oil pump generates trace pressure leakage, so that the pressure value of the output oil is reduced to a certain extent, and the performance of the electronic oil pump is further affected.

In the case that no gap exists between the bearing cover plate 21 and the motor stator 34, oil enters the low-pressure cavity from the oil inlet 26, and finally is output to the gearbox from the oil outlet 27 of the high-pressure cavity.

According to the utility model, the circumferential sealing ring 40 is connected between the motor stator 34 and the bearing cover plate 21, the circumferential sealing ring 40 is used for sealing the bearing cover plate 21 and the motor stator 34, the tightness of the motor stator 34 and the bearing cover plate 21 can be ensured by the structure, so that oil is prevented from flowing to the contact surface of the pump shell 22 and the motor shell 31 through the gap between the motor stator 34 and the bearing cover plate 21 and finally flowing to the external space, the technical scheme is beneficial to improving the tightness of the inner cavity of the motor, and the circumferential sealing ring 40 realizes circumferential sealing.

Referring to fig. 2 and 3, the bearing cover 21 has a first end surface 211 and a second end surface 212, the first end surface 211 extending in a radial direction (R direction as shown in fig. 2 or 3) and facing the motor stator 34 in an axial direction (AX direction as shown in fig. 2 or 3), and the second end surface 212 extending in the axial direction and facing the motor stator 34 in the radial direction.

The first end surface 211 or the second end surface 212 is provided with a circumferential sealing ring 40, and the circumferential sealing ring 40 is in close contact with the end surface of the motor stator 34, so that the tightness of the motor stator 34 and the bearing cover plate 21 is ensured.

In the present embodiment, the position of the circumferential seal ring 40 on the bearing cover plate 21 is not particularly limited, and the circumferential seal ring 40 may be disposed on the first end surface 211 of the bearing cover plate 21 or may be disposed on the second end surface 212 of the bearing cover plate 21, so long as the tightness of the motor stator 34 and the bearing cover plate 21 is ensured, so as to prevent oil from flowing to the housing contact surface through the gap between the motor stator 34 and the bearing cover plate 21.

In other possible embodiments, the first end surface 211 or the second end surface 212 is provided with a circumferential groove (not shown in the figures) in which the circumferential seal ring 40 is accommodated. Through the circumferential sealing ring 40 arranged in the circumferential groove, oil is prevented from flowing to the contact surface of the shell through the gap between the motor stator 34 and the bearing cover plate 21, and the performance of the electronic oil pump is ensured.

The circumferential seal ring 40 is an O-ring. By arranging the O-shaped ring, oil leakage is avoided.

One end of the motor shaft 32 is connected with the pump assembly 20, the other end of the motor shaft is arranged towards the bottom surface 311 of the motor housing 31, the bottom surface 311 of the motor housing 31 is not provided with a through hole, the oil is blocked from flowing to the outside, the electronic oil pump does not generate pressure leakage, and the performance of the electronic oil pump is ensured.

Referring to fig. 5, the dashed line with an arrow in the figure shows a second path for oil leakage. In the case where the bottom surface 311 of the motor housing 31 is provided with a through hole, a small portion of the oil flows from the low-pressure chamber toward the motor assembly 30 in the axial direction (AX direction shown in fig. 5) along the motor shaft 32, flows into the motor accommodating chamber 33 of the motor assembly 30, moves toward the bottom surface 311 of the motor housing 31 in the axial direction along the gap between the motor stator 34 and the motor rotor 35, and flows out of the through hole of the bottom surface 311, which is the oil leakage second path. Typically the through bore is referred to as a bearing bore.

The bottom surface 311 of the motor housing 31 is also provided with a bearing seat in which the bearing is fitted. Illustratively, the bearing is a ball bearing.

In the utility model, the bottom surface 311 of the motor shell 31 is not provided with a through hole, so that the oil is blocked from flowing to the outside, the electronic oil pump does not generate pressure leakage, and the performance of the electronic oil pump is ensured.

With continued reference to fig. 2 or 3, one side of the motor housing 31 is provided with a slot (not shown in the drawings) for clamping the plug connector 36, the plug connector 36 is used for fixedly connecting the connection terminal 11, one end of the connection terminal 11 extends out of the motor housing 31 and is connected with a PCB (not shown in the drawings) of the controller assembly 10, and the other end is connected with a copper wire inside the motor stator 34, and due to the design of the slot, a gap is easily generated at the joint of the motor housing 31 and the plug connector 36.

Referring to fig. 6, the dashed line with an arrow in the figure shows a third path for oil leakage. A small portion of the oil flows from the low-pressure chamber toward the motor assembly 30 in the axial direction (AX direction shown in fig. 6) along the motor shaft 32, flows into the motor housing 33 of the motor assembly 30, moves toward the bottom surface 311 of the motor housing 31 in the axial direction along the gap between the motor stator 34 and the motor rotor 35, and when too much oil accumulates in the motor housing 33, moves toward the gap between the motor stator 34 and the motor housing 31 left for preventing press-fitting deformation, moves upward in the axial direction along the side surface of the motor stator 34, and finally leaks outside at the gap between the motor housing 31 and the plug 36, which is the third path of oil leakage.

A sealant (not shown) is provided at the junction of the plug 36 and the slot, and is used to seal the gap between the plug 36 and the motor housing 31. So that the oil liquid can not leak to the outside from the gap between the motor housing 31 and the plug 36 even if the oil liquid moves upwards along the axial direction along the gap between the motor stator 34 and the motor housing 31 and along the side surface of the motor stator 34, so that the electronic oil pump does not generate pressure leakage, and the performance of the electronic oil pump is ensured.

The connection of the plug-in connection 36 to the connection terminal 11 comprises a plug-in connection, a welding connection or a screw connection. Illustratively, the welding of the terminal 11 to the plug 36 reduces contact resistance and increases the strength of the connection of the terminal 11 to the plug 36.

The electronic oil pump provided by the utility model can realize the sealing in the electronic oil pump, so that the electronic oil pump does not generate pressure leakage, the high-pressure oil output is ensured, and the performance of the electronic oil pump is ensured.

The utility model also provides a gearbox, which comprises the electronic oil pump in any embodiment.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. An electronic oil pump is characterized by comprising a controller component, a pump component and a motor component which are sequentially connected along the axial direction,

the controller assembly is used for controlling the motor assembly;

the pump assembly is used for supplying oil to the gearbox, the pump assembly comprises a bearing cover plate and a pump housing, the bearing cover plate and the pump housing form a pump content cavity, the pump content cavity is used for accommodating a pump stator and a pump rotor, and the bearing cover plate is used for supporting the pump stator and the pump rotor;

the motor assembly is used for driving the pump assembly, the motor assembly comprises a motor shell and a motor shaft, the motor shaft is in clearance fit with the bearing cover plate, the bearing cover plate and the motor shell form a motor accommodating cavity, and the motor accommodating cavity is used for accommodating a motor stator and a motor rotor;

and a circumferential sealing ring is connected between the motor stator and the bearing cover plate and is used for sealing the bearing cover plate and the motor stator.

2. The electronic oil pump of claim 1, wherein the bearing cover plate has a first end face that extends radially and axially toward the motor stator and a second end face that extends axially and radially toward the motor stator.

3. The electronic oil pump according to claim 2, wherein the first end face or the second end face is provided with the circumferential seal ring, and the circumferential seal ring is in close contact with an end face of the motor stator.

4. The electronic oil pump of claim 3, wherein the first end face or the second end face is provided with a circumferential groove, and the circumferential groove accommodates the circumferential seal ring therein.

5. The electronic oil pump of any of claims 1-4, wherein the circumferential seal ring is an O-ring.

6. The electronic oil pump according to claim 1, wherein one end of the motor shaft is connected to the pump assembly, and the other end is disposed toward a bottom surface of the motor housing, the bottom surface of the motor housing being not provided with a through hole.

7. The electronic oil pump of claim 1, wherein a slot is provided at one side of the motor housing, the slot is used for clamping a plug connector, the plug connector is used for fixedly connecting a connection terminal, one end of the connection terminal extends out of the motor housing and is connected with the PCB of the controller assembly, and the other end is connected with the motor stator.

8. The electronic oil pump of claim 7, wherein a sealant is provided at the junction of the plug and the slot, the sealant being used to seal a gap between the plug and the motor housing.

9. The electronic oil pump of claim 7, wherein the fixed connection of the plug to the terminal block comprises a plug, a weld, or a threaded connection.

10. A gearbox, characterized in that it comprises an electronic oil pump according to any one of claims 1-9.