CN115628393A

CN115628393A - Oil pump and electronic oil pump

Info

Publication number: CN115628393A
Application number: CN202211651475.8A
Authority: CN
Inventors: 邓涛; 张金伟; 王军; 向远健; 肖光伟; 向明朗
Original assignee: Sichuan Xinzhi Thermal Control Technology Co ltd
Current assignee: Sichuan Xinzhi Thermal Control Technology Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-01-20

Abstract

The invention discloses an oil pump and an electronic oil pump, and relates to the technical field of oil pumps; the oil pump includes. The electronic oil pump comprises a pump body and a driving shaft; a pump cavity is arranged in the pump body, and a rotor assembly is arranged in the pump cavity; one end of the driving shaft is rotatably connected with one end of the pump body through a first sliding bearing, the other end of the driving shaft is rotatably connected with the other end of the pump body through a second sliding bearing, and the driving shaft penetrates through the pump cavity; the rotor assembly is in transmission connection with the middle of the driving shaft, the driving shaft is supported through the sliding bearing, compared with the mode that the driving shaft is supported through the rolling bearing, the oil pump works more smoothly and is low in noise, an oil film generated during the operation of the sliding bearing has a vibration absorption effect, the bounce of the driving shaft in the operation process can be reduced, the friction of the driving shaft in the operation process can be reduced, and therefore the reliability and the service life of the electronic oil pump are improved. The electronic oil pump adopts the oil pump, and has smooth work, low noise, high reliability and long service life.

Description

Oil pump and electronic oil pump

Technical Field

The invention relates to the technical field of oil pumps, in particular to an oil pump and an electronic oil pump.

Background

Compared with the traditional mechanical oil pump, the electronic oil pump has the greatest characteristic of stepless speed regulation and can supply the flow and oil pressure of lubricating oil according to requirements. With the rapid development of new energy automobiles, the requirement of working without failure in the whole life cycle is put forward, so that the design of an electronic oil pump with high reliability, long service life and low cost is a problem to be solved.

The existing electronic oil pump is characterized in that a motor rotor assembly is composed of a motor rotor, a driving shaft and a rolling bearing, the matching size of the bearing is high in precision requirement, the process technology is complex and various, and meanwhile, after the rolling bearing works for a long time, the vibration and the noise of the rolling bearing are deteriorated, so that the reliability and the service life of the electronic oil pump are influenced.

Disclosure of Invention

The technical problems of poor reliability and short service life of the existing electronic oil pump during long-term operation are solved; the invention provides an oil pump and an electronic oil pump, wherein a sliding bearing is adopted to support a driving shaft, compared with a rolling bearing, the oil pump is smoother to work and has low noise, an oil film generated during the work of the sliding bearing has a vibration absorption function, the bounce of the driving shaft during the work can be reduced, the friction of the driving shaft during the work can be reduced, and the reliability and the service life of the electronic oil pump are improved.

The invention is realized by the following technical scheme:

in a first aspect, the present invention provides an oil pump comprising a pump body and a drive shaft; a pump cavity is arranged in the pump body, and a rotor assembly is arranged in the pump cavity; one end of the driving shaft is rotatably connected with one end of the pump body through a first sliding bearing, the other end of the driving shaft is rotatably connected with the other end of the pump body through a second sliding bearing, and the driving shaft penetrates through the pump cavity; the rotor assembly is in transmission connection with the middle of the driving shaft.

According to the oil pump provided by the invention, one end of the driving shaft is rotationally connected with one end of the pump body through the first sliding bearing, the other end of the driving shaft is rotationally connected with the other end of the pump body through the second sliding bearing, and the driving shaft penetrates through the pump cavity, namely, the two ends of the driving shaft are respectively connected with the corresponding side walls of the pump cavity through the sliding bearings, and the rotor assembly is in transmission connection with the middle part of the driving shaft so as to drive the rotor assembly to rotate through the driving shaft, so that oil is pumped, and the pumping function is realized. Compared with the adoption of a rolling bearing for supporting, the oil pump works more smoothly and has low noise, and an oil film generated during the working of the sliding bearing has a vibration absorption effect, so that the bounce of the driving shaft in the working process can be reduced, the friction of the driving shaft in the working process can be reduced, and the reliability and the service life of the electronic oil pump can be improved.

In an alternative embodiment, a first guide groove and a second guide groove are respectively arranged on two sides of the pump cavity, which are opposite to the end part of the rotor assembly; the first oil groove and the second oil groove extend to the side wall of the driving shaft through a gap between the rotor assembly and the pump cavity, so that oil in the pump cavity can flow to the first sliding bearing and the second sliding bearing, and self-lubrication of the first sliding bearing and the second sliding bearing is achieved.

In an alternative embodiment, the rotor assembly is a gerotor assembly, including an outer rotor and an inner rotor; the outer rotor is sleeved on the outer side of the inner rotor and is arranged on the side of an oil inlet and an oil outlet of the pump body, and the radial side wall of the outer rotor and the side wall of the pump cavity are arranged at intervals; the inner rotor is connected with the drive shaft in a transmission mode, the inner rotor and the outer rotor are arranged in an eccentric mode to pump oil through eccentric meshing of the inner rotor and the outer rotor, liquid flows exist between the inner rotor and the outer rotor and between the outer rotor and the side wall of a pump cavity, so that the effect of oil inlet and outlet at both sides is achieved, the flow rate of the oil in the oil pump cavity is reduced, pressure balance at both sides of the rotor is improved, fluid noise is reduced, vibration of the oil pump is further reduced, and the service life of the oil pump is further prolonged.

In an optional implementation manner, one end of the pump body is provided with a positioning taper hole and a positioning pin hole, the outer diameter of one end of the positioning taper hole, which is far away from the pump cavity, is larger than that of the other end of the positioning taper hole, one end of the driving shaft is inserted into the positioning taper hole, and the positioning pin hole is used for inserting a process pin, so that the coaxiality of the driving shaft and the first sliding bearing and the second sliding bearing is ensured, and the assembly precision is improved.

In an optional implementation mode, a filter screen is adapted to the oil inlet of the pump body, and the filter screen is connected with the pump body through a plurality of first buckles, so that the filter screen is convenient to assemble and maintain.

In a second aspect, the invention provides an electronic oil pump, which comprises a driving motor and the oil pump, wherein a motor shaft of the driving motor is in transmission connection with the driving shaft.

The electronic oil pump provided by the invention adopts the oil pump, the work is smooth, the noise is low, the oil film generated when the sliding bearing works has a vibration absorption function, the bounce of the driving shaft in the work can be reduced, the friction of the driving shaft in the work can be reduced, and the reliability and the service life of the electronic oil pump are improved.

In an alternative embodiment, the driving motor comprises a control block and a conductive motor casing, and the control block is coaxially arranged in the motor casing; the utility model discloses a motor casing, including control block, control block lateral wall, ground connection shell fragment, control block lateral wall are provided with the ground connection shell fragment, ground connection shell fragment one end with control block fixed connection, the ground connection shell fragment other end is contradicted the inside wall of motor casing to carry out ground connection through the ground connection shell fragment to the control block and handle, and current electronic oil pump EMC passes through metal sheet ground connection, and the structure is more complicated, influences overall structure lightweight.

In an optional implementation manner, a magnet is arranged at one end, opposite to the control block, of the motor shaft, a hall sensor is arranged on the control block, and the hall sensor is used for sensing the state of the magnet so as to indirectly obtain the rotation state of the driving shaft by obtaining the state of the magnet, so that the rotating speed range of the motor is larger, and more operation conditions are matched.

In an optional implementation manner, the driving motor further includes a rear cover, the rear cover is clamped at one end of the motor casing far away from the pump body, and the rear cover is connected with the motor casing through a plurality of second buckles.

The bolt fastening of current electronic pump end cover generally adopts 3 or 4 fix with screws, can't provide even axial force and face pressure for the end cover, and the warpage takes place easily at high temperature operating mode end cover, leads to sealed inefficacy. And the tightening force of each bolt is important process data, 100% monitoring and checking are needed, the more the number of the bolts is, the more the process technology is complicated. The invention adopts the buckle to fix the rear cover, simplifies the assembly process, has higher assembly efficiency and improves the process stability.

In an optional embodiment, the control block is mounted on the rear cover through a third buckle, so that the control block is fixed conveniently.

Compared with the prior art, the invention has the following advantages and beneficial effects

1. Compared with the oil pump supported by a rolling bearing, the oil pump provided by the invention has smoother operation and low noise, and an oil film generated during the operation of the sliding bearing has a vibration absorption effect, so that the bounce of the driving shaft in the operation can be reduced, the friction of the driving shaft in the operation can be reduced, and the reliability and the service life of the electronic oil pump can be improved.

2. According to the oil pump provided by the invention, the driving shaft is supported by the two sliding bearings, so that the structure of the oil pump is simplified, and the matching dimensional precision of parts is reduced, thus the assembly process requirement of the oil pump is reduced, and the reliability of the oil pump can be improved.

3. The electronic oil pump provided by the invention adopts the oil pump as a pump head, the work is smooth, the noise is low, an oil film generated when the sliding bearing works has a vibration absorption function, the bounce of the driving shaft in the work can be reduced, the friction of the driving shaft in the work can be reduced, and the reliability and the service life of the electronic oil pump are improved.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

In the drawings:

FIG. 1 is a schematic diagram of an oil pump according to an embodiment of the present invention;

FIG. 2 is a schematic view of a pump cover according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a pump cover assembly process according to an embodiment of the present invention

FIG. 4 is a schematic view of an oil pump flow passage according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a filter screen according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an electronic oil pump according to an embodiment of the present invention;

FIG. 7 is a schematic view of a control block mounted on a rear cover according to an embodiment of the present invention;

FIG. 8 is a schematic view of a control block of an embodiment of the present invention as assembled within a motor casing;

fig. 9 is a schematic structural diagram of a rear cover according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

100-oil pump, 110-pump body, 111-pump cavity, 112-outer rotor, 113-inner rotor, 114-first sliding bearing, 115-second sliding bearing, 116-first guide groove, 117-second guide groove, 118-pump cover, 118 a-positioning taper hole, 118 b-positioning pin hole, 119-pump base, 119 a-oil return hole, 119 b-oil seal, 120-driving shaft, 130-filter screen, 131-fixing ring, 132-first buckle;

200-a driving motor, 210-a motor shaft, 211-a magnet, 220-a motor rotor, 230-a motor shell, 240-a control block, 241-a grounding elastic sheet, 250-a rear cover, 251-a second buckle, 252-a third buckle and 252 a-a limiting step;

300-process pin;

and 400, installing a tool.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like refer to orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that are conventionally used in the product of the present application, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are intended merely to facilitate the description of the present application and to simplify the description, but do not indicate or imply that the device or element that is referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present application.

Example 1

Referring to fig. 1, the present embodiment provides an oil pump including a pump body 110 and a driving shaft 120; a pump cavity 111 is arranged in the pump body 110, and a rotor assembly is arranged in the pump cavity 111; one end of the driving shaft 120 is rotatably connected to one end of the pump body 110 by a first sliding bearing 114, the other end of the driving shaft 120 is rotatably connected to the other end of the pump body 110 by a second sliding bearing 115, and the driving shaft 120 is disposed through the pump cavity 111; the rotor assembly is in driving connection with the middle of the driving shaft 120.

Continuing with FIG. 1 in particular, typically, pump body 110 includes a pump cap 118 and a pump base 119, pump cap 118 and pump base 119 are sealingly assembled together, and pump chamber 111 is a cavity between pump cap 118 and pump base 119. And one end of the driving shaft 120 is rotatably connected to the pump mount 119 and the other end is rotatably connected to the pump cover 118. And the oil inlet is usually provided on the pump cover 118, and the pump base 119 is usually connected to the driving motor 200, so that an oil seal 119b is provided in the pump base 119, and the oil seal 119b is fitted around the driving shaft 120 to seal the gap between the driving shaft 120 and the pump base 119 by the oil seal 119b, thereby preventing oil from leaking along the driving shaft 120.

It is understood that the first sliding bearing 114 may be formed by a bearing bush provided on the pump cover 118 and the driving shaft 120, or may be formed by a through hole side wall on the pump cover 118 and the driving shaft 120; similarly, the second sliding bearing 115 may be formed by a bearing provided on the pump mount 119 and the drive shaft 120, or may be formed by a through-hole side wall of the pump mount 119 and the drive shaft 120.

In this embodiment, the pump chamber 111 has a first guide groove 116 and a second guide groove 117 on two sides facing the end of the rotor assembly; the first oil groove and the second oil groove both extend from the gap between the rotor assembly and the pump chamber 111 to the side wall of the drive shaft 120, so that oil in the pump chamber 111 can flow to the first sliding bearing 114 and the second sliding bearing 115, thereby achieving self-lubrication of the first sliding bearing 114 and the second sliding bearing 115 and cooling the drive shaft 120.

Referring to fig. 1, more specifically, a first guide groove 116 is formed at the bottom of a cavity at the lower end of a pump cover 118, a second guide groove 117 is formed at the bottom of a cavity of a pump base 119, and an oil return hole 119a is formed in the pump base 119, the oil return hole 119a extends from the upper end of the oil seal to the lower end of the pump cavity 111, and oil between a driving shaft 120 and the wall of the cavity of the pump base 119 is returned to the pump cavity 111 through the oil return hole 119a, so that oil is prevented from being deposited, and normal operation of the driving shaft 120 is ensured.

With reference to fig. 2, one end of the pump body 110 is provided with a positioning tapered hole 118a and a positioning pin hole 118b, an outer diameter of one end of the positioning tapered hole 118a, which is far away from the pump cavity 111, is larger than an outer diameter of the other end, one end of the driving shaft 120 is inserted into the positioning tapered hole 118a, and the positioning pin hole 118b is used for inserting a process pin 300, so as to ensure coaxiality of the driving shaft 120 with the first sliding bearing 114 and the second sliding bearing 115, and improve assembly accuracy.

Note that, a pin hole for inserting the process pin 300 is provided in the pump mount 119. With reference to fig. 3, during assembly, the conical surface of the mounting fixture 400 is utilized to completely attach to the pump cover 118 by the conical surface, so that a gap between the pump cover 118 and the mounting fixture 400 is eliminated, a process pin 300 is inserted into the positioning pin hole 118b of the pump cover 118 and the pin hole of the pump base 119 to restrict the rotation direction, and the pump cover 118 is completely restricted by the conical surface positioning and the process pin 300, so that the assembly precision is improved, and the problem of large coaxiality precision error of the driving shaft 120 during assembly is solved.

To the rotor subassembly, only need under drive shaft 120's drive realize the pump oil can, can blade subassembly, gerotor subassembly etc. in this embodiment, the rotor subassembly is gerotor subassembly, and is specific:

including an outer rotor 112 and an inner rotor 113; the outer rotor 112 is sleeved outside the inner rotor 113, and is arranged at the side of the oil inlet and the oil outlet of the pump body 110, and the radial side wall of the outer rotor 112 and the side wall of the pump cavity 111 are arranged at intervals; the inner rotor 113 is in transmission connection with the driving shaft 120, and the inner rotor 113 and the outer rotor 112 are eccentrically arranged.

Referring to fig. 4, the volume of the meshing area of the two rotors changes with the change of the rotation angle, so that oil is fed and discharged, and thus the flow and the oil pressure of the oil are generated, namely the oil is pumped through the eccentric meshing of the inner rotor 113 and the outer rotor 112. And liquid flows exist between the inner rotor 113 and the outer rotor 112 and between the outer rotor 112 and the side wall of the pump cavity 111 (the side of the outer rotor 112 opposite to the oil inlet with the pump cavity 111 and the side of the outer rotor 112 opposite to the oil outlet with the pump cavity 111), so that the effect of double-side oil inlet and outlet is achieved, the flow rate of oil in the oil pump cavity 111 is reduced, the pressure balance of the two sides of the rotor is improved, the fluid noise is reduced, the vibration of the oil pump is further reduced, and the service life of the oil pump is further prolonged.

On the basis, the oil inlet of the pump body 110 is adapted with a filter screen 130, and the filter screen 130 is connected with the pump body 110 through a plurality of first buckles 132, so that the filter screen 130 is convenient to assemble and maintain. Referring to fig. 5, in the present embodiment, the filter screen 130 is a metal filter screen, and is coated by integral injection molding to form a filter screen plastic assembly, that is, a fixing ring 131 is disposed on the periphery of the filter screen 130, and a plurality of fasteners are disposed on the outer side of the fixing ring 131.

In summary, in the oil pump provided by the embodiment, two ends of the driving shaft 120 are respectively connected to the corresponding side walls of the pump cavity 111 through sliding bearings, that is, the two sliding bearings form two-point support for the whole shafting, so as to ensure the stability of the rotation of the driving shaft 120, and the rotor assembly is in transmission connection with the middle portion of the driving shaft 120, so as to drive the rotor assembly to rotate through the driving shaft 120, so as to pump oil, thereby achieving the pumping function.

Compared with the supporting of a rolling bearing, the oil pump works more smoothly and has low noise, and an oil film generated by the sliding bearing during working has a vibration absorption function, so that the bounce of the driving shaft 120 during working can be reduced, the friction of the driving shaft 120 during working can be reduced, and the reliability and the service life of the electronic oil pump can be improved.

In addition, a rolling bearing is omitted, the reliability of the installation process is high, the structure is simpler and more compact, the installation cost is lower, the assembly process flow of the electronic oil pump is simplified, and the stability of the process quality is improved.

Example 2

With reference to fig. 6, the present embodiment provides an electronic oil pump, which includes a driving motor 200 and the oil pump described in embodiment 1, wherein a motor shaft 210 of the driving motor 200 is in transmission connection with the driving shaft 120.

Referring to fig. 7, the driving motor 200 includes a control block 240 and a conductive motor case 230, the control block 240 being coaxially disposed within the motor case 230; the side wall of the control block 240 is provided with a grounding elastic sheet 241, one end of the grounding elastic sheet 241 is fixedly connected with the control block 240, the other end of the grounding elastic sheet 241 abuts against the inner side wall of the motor casing 230 so as to perform grounding treatment on the control block 240 through the grounding elastic sheet 241, and the existing electronic oil pump EMC is grounded through a metal plate, so that the structure is more complex, and the whole structure is light.

It can be known that, still be fit with motor rotor 220 in motor casing 230, motor rotor 220 and motor shaft 210 fixed connection to drive motor shaft 210 through motor rotor 220 and rotate. The motor shaft 210 only needs to drive the driving shaft 120 to rotate synchronously, and can be connected through a coupler, or the motor shaft 210 and the driving shaft 120 can be integrally processed and molded. Similarly, the pump mount 119 may be directly mounted on the end of the motor casing 230 where the motor shaft 210 is disposed, or may be directly formed by integrally machining the motor casing 230. Generally, a clamping groove is added at an asymmetric position outside the motor casing 230, so that the motor casing is convenient to disassemble during installation and maintenance.

When the control block 240 is assembled, pressure is applied to the grounding elastic sheet 241 along the assembling direction, so that the effect of fixing the grounding elastic sheet 241 is achieved, the self vibration of the grounding elastic sheet 241 in operation is reduced, and the soldering tin strength is prevented from being influenced. Referring to fig. 8, when the control block 240 is assembled with the motor casing 230, the grounding elastic piece 241 is compressed, and under the action of elastic potential energy, the grounding elastic piece is connected with the metal motor casing 230 to form a grounding end.

It can be understood that the metal plate can be cancelled by arranging the electric connection elastic sheet, so that the number of parts is reduced, the whole structure is more compact, and the installation is more convenient.

In addition, a magnet 211 is arranged at one end of the motor shaft 210, which faces the control block 240, and the control block 240 is provided with a hall sensor, which is used for sensing the state of the magnet 211 so as to indirectly obtain the rotation state of the driving shaft 120 by obtaining the state of the magnet 211, so that the rotation speed range of the motor is larger and more operation conditions are matched.

That is, a magnetic ring is embedded at one end of the motor shaft 210 facing the control block 240, a hall sensor is disposed at a position corresponding to the control block 240, and when the motor is started, a circuit on the control block 240 senses the state of the motor rotor 220 through the magnetic poles of the hall element and outputs a corresponding signal, so that stable operation of the motor can be ensured, and the range width is increased.

It should be understood that the driving motor 200 further includes a rear cover 250, the rear cover 250 is clamped at an end of the motor housing 230 far away from the pump body 110, and the rear cover 250 is connected to the motor housing 230 by a plurality of second fasteners 251.

In addition, the control block 240 is mounted on the rear cover 250 by a third clip 252, which facilitates the fixing of the control block 240.

The bolt fastening of current electronic pump end cover generally adopts 3 or 4 fix with screws, can't provide even axial force and face pressure for the end cover, and the warpage takes place easily at high temperature operating mode end cover, leads to sealed inefficacy. And the tightening force of each bolt is important process data, 100% monitoring and checking are needed, the more the number of the bolts is, the more the process technology is complicated. The invention adopts the buckle to fix the rear cover 250, simplifies the assembly process, has higher assembly efficiency and improves the process stability. In detail with reference to fig. 9:

the shape of the buckle at the joint of the rear cover 250 and the control block 240 is a two-piece split structure, the plurality of third buckles 252 are uniformly distributed on the rear cover 250, when the control block 240 is installed, the third buckles 252 are inwardly contracted, after passing through the installation holes on the control block 240, the elastic potential energy of the third buckles 252 is released and naturally outwardly expanded, and the control block 240 is fixed on the rear cover 250 through the tension force and the buckle structure. During assembly, the limiting step 252a of the third latch 252 coincides with the assembly surface of the control block 240, and limits the control block 240, so that the control block 240 cannot move axially.

It should be noted that, when the rear cover 250 is assembled, the guide posts on the rear cover 250 are inserted into the holes reserved on the control block 240 to fix the position of the control block 240. And the back cover 250 is provided with a clearance groove, the edge surface of the groove is tightly attached to the control block 240, during press mounting, force is uniformly and intensively conducted around the mounting hole of the control block 240, the mounting hole is tightly connected with the motor terminal, so that stable conduction of electric signals during work is ensured, and meanwhile, the clearance groove also reserves a position for the terminal to penetrate through the controller.

Wherein, the clearance between two petals of third buckle 252 is the inclined plane design to reserve buckle radial deformation position in the installation, and the inclined plane design has also ensured the smooth in the drawing of patterns process.

Generally, the rear cover 250 is integrally molded by injection, and is integrally embedded into the motor casing 230 during installation, and the motor casing 230 wraps the rear cover 250 to reduce the falling risk under the influence of radial force. A sealant is coated on the rear cover 250 at the cost, so that the sealing performance of the cavity is guaranteed, an electronic oil pump assembly is formed, the assembling process flow of the electronic oil pump is greatly simplified, and the stability of the process quality is improved.

In summary, the electronic pump provided by the embodiment adopts the above-mentioned oil pump as the pump head, and has smooth operation and low noise, and the oil film generated during the operation of the sliding bearing has a vibration absorbing function, so as to reduce the bounce of the driving shaft 120 during the operation and reduce the friction received by the driving shaft 120 during the operation, thereby improving the reliability and the service life of the electronic pump.

In addition, the control block 240 and the rear cover 250, and the rear cover 250 and the motor casing 230 are all connected by a buckle, and compared with the existing electronic oil pump, the structure is simpler and more compact, the installation cost is lower, the assembly process flow of the electronic oil pump is simplified, and the stability of the process quality is improved.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An oil pump, characterized by comprising a pump body (110) and a drive shaft (120);

a pump cavity (111) is arranged in the pump body (110), and a rotor assembly is arranged in the pump cavity (111);

one end of the driving shaft (120) is rotationally connected with one end of the pump body (110) through a first sliding bearing (114), the other end of the driving shaft (120) is rotationally connected with the other end of the pump body (110) through a second sliding bearing (115), and the driving shaft (120) penetrates through the pump cavity (111);

the rotor assembly is in transmission connection with the middle of the driving shaft (120).

2. The oil pump of claim 1, wherein the pump chamber (111) is provided with a first oil groove (116) and a second oil groove (117) on both sides of the end portion facing the rotor assembly;

the first oil groove (116) and the second oil groove (117) each extend to a sidewall of the drive shaft (120) from a gap between the rotor assembly and the pump chamber (111).

3. The oil pump of claim 1, wherein the rotor assembly is a gerotor assembly comprising an outer rotor (112) and an inner rotor (113);

the outer rotor (112) is sleeved on the outer side of the inner rotor (113), and is arranged on the side of an oil inlet and an oil outlet of the pump body (110), and the radial side wall of the outer rotor (112) and the side wall of the pump cavity (111) are arranged at intervals;

the inner rotor (113) is in transmission connection with a driving shaft (120), and the inner rotor (113) and the outer rotor (112) are arranged eccentrically.

4. The oil pump according to claim 1, characterized in that one end of the pump body (110) is provided with a positioning taper hole (118 a) and a positioning pin hole (118 b), the outer diameter of one end of the positioning taper hole (118 a) far away from the pump cavity (111) is larger than that of the other end, one end of the driving shaft (120) is inserted in the positioning taper hole (118 a), and the positioning pin hole (118 b) is used for inserting a process pin (300).

5. The oil pump according to claim 1, characterized in that the oil inlet of the pump body (110) is fitted with a filter screen (130), the filter screen (130) being connected to the pump body (110) by a plurality of first snap-fits (132).

6. An electronic oil pump comprising a drive motor (200), characterized by further comprising an oil pump according to any one of claims 1 to 5, wherein a motor shaft (210) of the drive motor (200) is in driving connection with the drive shaft (120).

7. The electronic oil pump according to claim 6, characterized in that the drive motor (200) comprises a control block (240) and a conductive motor housing (230), the control block (240) being coaxially arranged within the motor housing (230);

the side wall of the control block (240) is provided with a grounding elastic sheet (241), one end of the grounding elastic sheet (241) is fixedly connected with the control block (240), and the other end of the grounding elastic sheet (241) abuts against the inner side wall of the motor casing (230).

8. The electronic oil pump according to claim 7, characterized in that the end of the motor shaft (210) facing the control block (240) is provided with a magnet (211), and the control block (240) is provided with a hall sensor for sensing the state of the magnet (211).

9. The electronic oil pump of claim 7, wherein the driving motor (200) further comprises a rear cover (250), the rear cover (250) is clamped at one end of the motor housing (230) far away from the pump body (110), and the rear cover (250) is connected with the motor housing (230) through a plurality of second fasteners (251).

10. The electronic oil pump according to claim 9, characterized in that the control block (240) is mounted on the rear cover (250) by a third catch (252).