CN215762083U

CN215762083U - Gearbox electric oil pump

Info

Publication number: CN215762083U
Application number: CN202121604549.3U
Authority: CN
Inventors: 汪靖; 孙涛
Original assignee: Vitesco Automotive Wuhu Co Ltd
Current assignee: Vitesco Automotive Wuhu Co Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-02-08
Anticipated expiration: 2031-07-13

Abstract

The utility model discloses a gearbox electric oil pump, comprising: a pump assembly for supplying oil to the gearbox; a motor assembly for driving the pump assembly; a controller assembly for controlling the motor; the pump assembly is arranged at one end of the motor assembly and is connected with a motor shaft of the motor assembly; the controller assembly is arranged at the other end of the motor assembly and comprises a controller shell, a shell cover plate, a PCB arranged in the controller shell and a plug connector with one end connected to the PCB; one side of the controller shell is provided with a hole, the other side of the controller shell is provided with an opening, the shell cover plate is used for sealing the opening, the other end of the plug connector extends out of the hole, and the hole is sealed by using a special-shaped sealing ring; the edge of the opening of the controller shell is provided with an annular groove, the edge of the shell cover plate is provided with an annular protrusion matched with the annular groove, the annular groove is matched with the annular protrusion to realize sealing between the controller shell and the shell cover plate, and the oil liquid can not contact with a PCB when cooling the motor and the PCB, so that the failure of the controller is avoided.

Description

Gearbox electric oil pump

Technical Field

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

Background

Gearbox electric oil pump can produce a large amount of heats at the work, and the high temperature that the heat gathering produced can lead to the motor to damage, makes the unable normal operating of gearbox, consequently need cool off electric oil pump. In the prior art, an electric oil pump usually adopts two modes of air cooling and oil cooling to realize self cooling, wherein when the air cooling mode is adopted, the oil pump is arranged inside a gearbox, a motor and a controller are arranged outside the gearbox, and cooling is carried out through a fan and a radiating fin; when the oil cooling mode is adopted, the pump, the motor and the controller can be integrally arranged inside the gearbox, the motor is soaked in the gearbox oil for cooling, the heat dissipation effect is good, and the sealing performance between the motor and the controller is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that in the prior art, the heat dissipation effect of the electric oil pump of the gearbox is poor, and the sealing performance between a motor and a controller is difficult to control. The utility model provides a gearbox electric oil pump which can realize good controller sealing performance when the electric oil pump adopts an oil cooling mode.

In order to solve the above technical problem, an embodiment of the present invention discloses a transmission electric oil pump, including:

a pump assembly for supplying oil to the gearbox;

a motor assembly for driving the pump assembly;

a controller assembly for controlling the motor;

the pump assembly is arranged at one end of the motor assembly and is connected with a motor shaft of the motor assembly; the controller assembly is arranged at the other end of the motor assembly and comprises a controller shell, a shell cover plate, a PCB arranged in the controller shell and a plug connector with one end connected to the PCB; one side of the controller shell, which is close to the motor component, is provided with a hole, the other side of the controller shell is provided with an opening, the shell cover plate is used for sealing the opening, the other end of the plug connector extends out of the hole, and the sealing between the plug connector and the edge of the hole is realized by using a special-shaped sealing ring; the edge of the opening of the controller shell is provided with an annular groove, the edge of the shell cover plate is provided with an annular protrusion matched with the annular groove, and the annular groove is matched with the annular protrusion to realize sealing between the controller shell and the shell cover plate.

By adopting the technical scheme, when the motor and the PCB are cooled in the internal circulation process of the electric oil pump by the oil of the gearbox, the oil can not contact with the PCB, so that a good sealing effect is realized, the controller assembly can work stably and reliably, and the failure of the controller is avoided.

Further, the pump assembly includes a pump body, a pump housing, and a port plate.

Further, the pump body is in clearance fit with the valve plate.

Further, the pump assembly is keyed to the motor shaft.

Further, the motor assembly includes a motor stator, a motor rotor, a motor shaft, and a motor housing.

Furthermore, the connecting terminal of the motor assembly is fixedly connected with the plug connector of the controller on the outer side of the motor shell or the controller shell.

Further, the fixed connection includes a plug, a weld, or a threaded connection.

Further, one end of the motor shaft is connected with the pump assembly, and the other end of the motor shaft is supported by the bearing.

Further, the motor shaft is in interference fit with the motor rotor, and transmits torque and speed.

Furthermore, the material of dysmorphism sealing washer is silica gel.

Drawings

FIG. 1 illustrates a perspective view of a transmission electric oil pump in accordance with an embodiment of the present invention;

fig. 2 shows a cross-sectional view of a transmission electric oil pump according to an embodiment of the present invention in the axial direction.

The reference numbers in the figures are:

10-pump assembly 101-pump housing 102-oil inlet 103-oil outlet

104-outer rotor 105-inner rotor 106-valve plate 107-sealing ring

20-motor assembly 201-shaft sleeve 202-motor shell 203-motor stator

204-motor rotor 205-motor shaft 206-ball bearing 207-wiring terminal

208-sensor magnet 30-controller assembly 301-controller housing 302-opening

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the utility model will be described in conjunction with the preferred embodiments, it is not intended that the features of the utility model be limited to these embodiments. On the contrary, the intention of the novel description to be incorporated into the embodiments is to cover alternatives or modifications which may be extended in accordance with the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The utility model may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are only used for convenience in describing and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, should not be construed as limiting the present invention.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the present invention discloses a transmission electric oil pump, which is designed by integrating a pump assembly, a motor assembly and a controller assembly, and comprises a pump assembly 10, a motor assembly 20 and a controller assembly 30 which are sequentially connected in an axial direction. The pump assembly 10 is used to supply oil to a transmission. The motor assembly 20 is used to drive the pump assembly 10 to draw oil from the transmission sump for transmission internal gear lubrication and to cyclically cool the electric oil pump. The controller assembly 30 is used for motor control. One end of the motor assembly 20 is detachably connected with the pump assembly 10 through a motor shaft; the other end of the motor assembly 20 is removably connected to the controller housing, preferably as a threaded connection.

As shown in fig. 1 and 2, the controller assembly includes a controller housing, a housing cover plate (not shown), a PCB Board (not shown) disposed in the controller housing, and a connector (not shown) having one end connected to the PCB Board; one side of the controller shell 301, which is close to the motor component 20, is provided with an opening 302, the other side of the controller shell is provided with an opening, the shell cover plate is used for sealing the opening, one end of the plug connector is connected to the PCB, the other end of the plug connector extends out of the opening 302, and the edge of the opening 302 is sealed by the plug connector through a special-shaped sealing ring; the edge of the opening of the controller shell 301 is provided with an annular groove, the edge of the shell cover plate is provided with an annular protrusion matched with the annular groove, and the annular groove is matched with the annular protrusion to realize sealing between the controller shell 301 and the shell cover plate. In this embodiment, when the transmission electric oil pump is used, the annular groove of the controller casing 301 is coated with a sealant, and the sealant can tightly bond the annular protrusion on the casing cover plate and the annular groove, so as to realize reliable sealing between the annular protrusion and the annular groove, thereby further ensuring the sealing performance of the controller assembly.

Further, referring to fig. 2, in the present embodiment, the pump assembly 10 includes a pump housing 101, a pump body, and a port plate 106. The pump body is preferably a cycloid pump body, and compared with a meshing gear pump body, the cycloid pump body can effectively reduce the volume occupied by the pump assembly and reduce the cost. An oil inlet 102 and an oil outlet 103 are arranged on the pump housing 101 and are respectively communicated with an oil inlet cavity and an oil outlet cavity of the pump body of the cycloid pump. Specifically, referring to fig. 2, in the present embodiment, the pump body is composed of an outer rotor 104 and an inner rotor 105, and the profiles of the inner rotor 105 and the outer rotor 104 are cycloid and fixed on a motor shaft 205. The port plate 106 is disposed proximate the motor housing 202 and is removably coupled, preferably threadably coupled, to the motor housing 202. The surface that valve plate 106 and motor casing 202 both contacted is opened flutedly on the two, is equipped with the sealing washer in the inslot, avoids electric oil pump normal use time fluid to ooze from the surface gap of valve plate 106 and motor casing 202 contact. The port plate 106 is in clearance fit with the pump body and is coaxial with the motor shaft 205.

Further, referring to fig. 2, in the present embodiment, the motor assembly 20 includes a motor housing 202, a motor stator 203, a motor rotor 204, and a motor shaft 205. The motor housing 202 is removably connected, preferably threadably connected, to the controller housing 301 and port plate 106. A gap is formed in the motor housing 202 near the terminal 207 for the oil in the electric oil pump to flow out. The motor is preferably a brushless direct current motor, and comprises a motor stator 203 and a motor rotor 204, wherein the motor stator 203 comprises a stator core and a stator winding and is used for generating a rotating magnetic field, the motor rotor 204 rotates in operation, magnetic induction lines in the rotating magnetic field are cut to generate current to drive a motor shaft 205, and the motor shaft 205 is in interference fit with the motor rotor 204 and transmits torque and power.

Specifically, referring to fig. 2, in the present embodiment, a bushing 201 is sleeved on an end of the motor shaft 205 near the pump assembly 10, and a bearing 206 is sleeved on an end near the controller assembly 30. The bearing 206 is preferably a ball bearing. The motor shaft of a conventional motor typically requires two bearings to support. In this embodiment, one end of the motor shaft 205 is connected to the pump assembly 10, and the other end of the motor shaft is supported by a bearing, that is, only one bearing is sleeved on the motor shaft 205, which not only can realize the stability of the axial load, but also can save the cost for mass production.

Further, referring to fig. 2, in the present embodiment, the motor assembly 20 further includes a sensor magnet 208 disposed at an end of the motor shaft 205 near one side of the controller assembly 30, and in normal operation, the sensor magnet 208 rotates together with the motor rotor 204, and the rotation speed of the motor rotor 204 is detected by the rotating magnetic field of the sensor magnet 208. Preferably, the sensor magnet 208 is a hall sensor magnet. The motor assembly 20 further includes a connection terminal 207, one end of which is located inside the electric oil pump and connected to the motor stator 203, and the other end of which extends outside the motor housing 202 and is fixedly connected to the PCB connector. Wherein the fixed connection comprises splicing, welding or threaded connection. In this embodiment, the connecting terminal is welded to the PCB connector, so that the contact resistance can be reduced. The gap between the connecting terminal 207 and the motor housing 202 is sealed by a special-shaped sealing ring, and the material of the sealing ring is preferably silica gel.

When the electric oil pump is used, a main control unit of an automobile sends a starting signal to the motor assembly 20 through the controller assembly 30, the motor assembly 20 is started, the motor shaft 205 drives the inner rotor 105 of the pump assembly 10 to rotate, at the moment, negative pressure is generated at the oil inlet cavity of the pump body, pressure difference between the oil inlet cavity and the oil outlet cavity drives oil in the gearbox to flow into the oil inlet cavity of the pump body from the oil inlet 102 of the pump shell body, then the oil enters the motor through a gap between the valve plate 106 and the motor shaft 205, flows through a gap between the motor stator 203 and the motor rotor 204, fills the cavity in the motor, and is in contact with the controller shell 301, and then flows out of the electric oil pump from a gap at the position, close to the connecting terminal 207, of the motor shell 202 and enters the inside of the gearbox, and primary oil circulates inside the electric oil pump (the oil flow path is shown by a dotted line in fig. 2). In the process, the electric oil pump is completely soaked in the oil of the gearbox, the heat generated when the motor and the PCB normally work is taken away through the circulation of the oil between the electric oil pump and the gearbox, and the motor and the PCB can be cooled simultaneously. Because controller casing and PCB board plug connector department are equipped with and are used for sealed special-shaped sealing washer, scribble sealed glue in the annular groove of controller casing, the edge of controller casing apron sets up in the annular that controller casing annular groove suited and swells, can ensure that gearbox fluid carries out the in-process that motor and PCB board refrigerated in the electric oil pump internal circulation, fluid can not contact with the PCB board, realize fine sealed effect, ensure that the controller subassembly can work reliably and steadily, avoid causing the controller to lose effect.

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 more detailed description of the utility model, taken in conjunction with the specific embodiments thereof, and that no limitation of the utility model is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. A transmission electric oil pump, comprising:

a pump assembly for supplying oil to the gearbox;

a motor assembly for driving the pump assembly;

a controller assembly for controlling the motor;

2. The transmission electric oil pump of claim 1, wherein the pump assembly comprises a pump body, a pump housing, and a port plate.

3. The transmission electric oil pump of claim 2, wherein the pump body is clearance-fitted with the port plate.

4. The transmission electric oil pump of claim 1, wherein the pump assembly is keyed to the motor shaft.

5. The transmission electric oil pump of claim 1, wherein the motor assembly includes a motor stator, a motor rotor, a motor shaft, and a motor housing.

6. The transmission electric oil pump of claim 5, wherein the connection terminal of the motor assembly is fixedly connected to the plug of the controller outside the motor housing or the controller housing.

7. The transmission electric oil pump of claim 6, wherein the fixed connection comprises a bayonet, welded, or threaded connection.

8. The transmission electric oil pump of claim 5, wherein the motor shaft is coupled to the pump assembly at one end and supported at the other end by a bearing.

9. The transmission electric oil pump of claim 8, wherein the motor shaft is an interference fit with the motor rotor to transmit torque and speed.

10. The transmission electric oil pump of claim 1, wherein the material of the profiled sealing ring is silica gel.