WO2019001199A1

WO2019001199A1 - Electric oil pump assembly, steering system and lubrication system

Info

Publication number: WO2019001199A1
Application number: PCT/CN2018/088748
Authority: WO
Inventors: 杨胜麟; 刘彦; 丁生瑞
Original assignee: 比亚迪股份有限公司
Priority date: 2017-06-26
Filing date: 2018-05-28
Publication date: 2019-01-03
Also published as: CN109113956A; CN109113956B

Abstract

An electric oil pump assembly, a steering system and a lubrication system; the electric oil pump assembly (1000) comprises: a motor assembly (200), an oil pump assembly (100) and an elastic member (311); the oil pump assembly (100) is floatingly mounted at an end portion of the motor assembly (200), and is connected to a motor shaft (250) of the motor assembly (200) by means of power coupling; the elastic member (311) is elastically connected between the motor assembly (200) and the oil pump assembly (100) so as to apply an axial preload force facing the motor assembly (200) to the oil pump assembly (100). The electric oil pump assembly (1000) has high working energy efficiency, and low requirements in processing precision and assembly precision.

Description

Electric oil pump assembly, steering system and lubrication system

This application claims priority to Chinese Patent Application No. 200910496465.4, entitled "Electric Oil Pump Assembly, Steering System and Lubrication System", filed on June 26, 2017, the entire contents of which are incorporated by reference. In this application.

Technical field

The present disclosure relates to the field of vehicle manufacturing technology, and in particular to an electric oil pump assembly, a steering system having the electric oil pump assembly, and a lubrication system having the electric oil pump assembly.

Background technique

The electric oil pump is widely used in the steering system and the lubrication system of the vehicle. In the related art, the oil pump and the motor of the electric oil pump are separated, and the connection relationship is only the power coupling connection between the oil pump shaft and the motor shaft, so that the electric oil pump is relatively large. The occupied installation space is large. In addition, the working noise of the motor and the working noise of the oil pump are relatively large. In the related art, various damping elements are often used to isolate the noise. The structure of the damping element is complicated, occupying a large installation space, and the production cost is high, and the assembly process is complicated. There is room for improvement.

Summary of the invention

The present disclosure is intended to address at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes an electric oil pump assembly that has high energy efficiency, low processing accuracy, and low assembly accuracy requirements.

An electric oil pump assembly according to an embodiment of the present disclosure includes: a motor assembly; an oil pump assembly floatingly mounted at an end of the motor assembly and coupled to a motor shaft of the motor assembly; an elastic member, The resilient member is resiliently coupled between the motor assembly and the oil pump assembly to apply an axial preload to the oil pump assembly toward the motor assembly.

According to the electric oil pump assembly of the embodiment of the present disclosure, by installing the elastic member to pre-install the oil pump assembly and floating the oil pump assembly, the working friction force of the oil pump assembly can be reduced, the working energy efficiency of the oil pump assembly can be improved, and the output of the oil pump assembly can be reduced. Pulse, and the electric oil pump assembly has the characteristics of adaptive alignment, which can reduce the machining accuracy and assembly accuracy requirements of the electric oil pump assembly.

An electric oil pump assembly according to an embodiment of the present disclosure, further comprising: a positioning member, the oil pump assembly is floatingly supported on a front end cover of the motor assembly, and the positioning member is coupled to the oil pump assembly and the front end cover And radially mating with at least one of the oil pump assembly and the front end cover.

According to an electric oil pump assembly of an embodiment of the present disclosure, the positioning member is a bolt, and an outer circumference of the oil pump assembly is provided with a lug, and the lug is provided with a positioning hole, and the bolt penetrates the positioning hole and is The front end cover is screwed, and the bolt is in clearance with the positioning hole.

According to an electric oil pump assembly of one embodiment of the present disclosure, the elastic member is a spring and is sleeved outside the bolt, and the spring elastically abuts between the lug and the head of the bolt.

In accordance with an electric oil pump assembly of one embodiment of the present disclosure, at least a portion of the rim of the front cover of the oil pump assembly extends radially outward to form the lug.

According to an electric oil pump assembly of one embodiment of the present disclosure, the lug is axially spaced apart from the front end cover, and the elastic member is elastically stretchably coupled between the lug and the front end cover.

According to an electric oil pump assembly of an embodiment of the present disclosure, the positioning member and the elastic member are each plural, and the plurality of positioning members are circumferentially spaced apart, a plurality of the positioning members and a plurality of the plurality of The elastic members correspond one by one.

An electric oil pump assembly according to an embodiment of the present disclosure has: an oil pumping chamber, the oil pump assembly is floatingly supported on a front end cover of the motor assembly, the oil pump assembly is installed in the oil pump chamber, and the oil pump chamber is The oil discharge ports of the oil pump assembly are connected and communicate with the total oil outlet of the electric oil pump assembly.

According to an electric oil pump assembly of an embodiment of the present disclosure, the front end cover is provided with an oil discharge passage, one end of the oil discharge passage is connected to the oil pump chamber, and the other end forms the total oil outlet.

An electric oil pump assembly according to an embodiment of the present disclosure, the front end cover has an annular boss extending axially away from the motor assembly, the annular boss forming a sidewall of the oil pump chamber, The top wall of the oil pump chamber is connected to the annular boss by a threaded fastener.

An electric oil pump assembly according to an embodiment of the present disclosure further includes: a soundproof cover that is disposed outside an outer wall surface of the oil pump chamber.

An electric oil pump assembly according to an embodiment of the present disclosure, further comprising: a low pressure cover disposed outside a wall surface of the oil pump chamber and defining a low pressure communicating with a total oil inlet of the electric oil pump assembly a cavity, the low pressure cover being connected to the front end cover.

According to an electric oil pump assembly of one embodiment of the present disclosure, the low pressure cover has a tapered peripheral wall, and an inner diameter of the low pressure cover gradually decreases from a direction near the total oil inlet to a direction away from the total oil inlet.

According to an electric oil pump assembly of one embodiment of the present disclosure, a seal ring is interposed between the oil pump assembly and the front end cover.

According to an electric oil pump assembly of one embodiment of the present disclosure, the motor assembly and the oil pump assembly are laterally disposed.

According to an electric oil pump assembly of an embodiment of the present disclosure, the motor assembly includes: a motor case, a rear end cover, a front end cover, a stator, and a rotor, the oil pump assembly is floatingly supported on the front end cover, the rear end a cover closes a rear end of the motor casing to form a liquid cooling chamber, the liquid cooling chamber includes a circulating oil passage extending in the axial direction and a rear cavity communicating with the circulating oil passage, the circulating oil passage is located at the Between the stator and the motor casing, the rear cavity is located between the rear end cover and the stator, the motor shaft and the rotor.

According to an electric oil pump assembly of one embodiment of the present disclosure, the number of the circulating oil passages is plural, and a plurality of the circulating oil passages are arranged spaced apart in the circumferential direction of the stator.

According to an electric oil pump assembly of an embodiment of the present disclosure, a total oil inlet of the electric oil pump assembly is in communication with the liquid cooling chamber, and the liquid cooling chamber is in communication with an oil suction port of the oil pump assembly.

An electric oil pump assembly according to an embodiment of the present disclosure, a motor shaft oil passage provided in a motor shaft of the motor assembly, the motor shaft oil passage is connected to the rear chamber, and an oil suction port of the oil pump assembly The motor shaft oil passage is connected.

According to an electric oil pump assembly of an embodiment of the present disclosure, the motor shaft oil passage extends in the axial direction and is open at an end remote from the oil pump assembly, and communicates with the rear chamber at the one end, and is provided at the other end. An oil supply hole extending in a radial direction, the oil supply hole being in communication with the oil suction port.

According to an electric oil pump assembly of an embodiment of the present disclosure, the oil supply holes are plural, and the plurality of oil supply holes are evenly spaced apart in the circumferential direction.

According to an electric oil pump assembly of an embodiment of the present disclosure, the front end cover has a support flange that protrudes axially toward a rotor of the motor assembly, the support flange for supporting a bearing of the motor assembly, The bearing flange, the motor shaft, and the bearing of the motor assembly collectively define an oil suction chamber connected to the oil suction port, and the oil supply hole is connected to the oil suction chamber.

An electric oil pump assembly according to an embodiment of the present disclosure, the rear end cover has a support base for supporting the motor shaft, and the support base is provided with an oil passage to communicate the rear cavity and the motor Shaft oil passage.

According to an electric oil pump assembly of an embodiment of the present disclosure, the front end cover is provided with a fuel passage that communicates the circulation oil passage with the oil suction port.

According to an electric oil pump assembly of an embodiment of the present disclosure, the front end cover has a support flange that protrudes axially toward a rotor of the motor assembly, the support flange for supporting a bearing of the motor assembly, The support flange, the motor shaft, and the bearing of the motor assembly collectively define an oil suction chamber connected to the oil suction port, the oil passage passages through the support flange to communicate the oil suction chamber and the circulation Oil channel.

An electric oil pump assembly according to an embodiment of the present disclosure, wherein the plurality of circulating oil passages are spaced apart in a circumferential direction of the stator, and at least one of the plurality of circulating oil passages is disposed The oil flows from the back to the front and is connected to the over-oil passage.

According to an electric oil pump assembly of an embodiment of the present disclosure, the total oil inlet is provided on the front end cover and is connected to the circulating oil passage, and the oil is disposed between the stator and the front end cover. ring.

According to an electric oil pump assembly of one embodiment of the present disclosure, the total oil inlet is provided above the front end cover.

According to an electric oil pump assembly of one embodiment of the present disclosure, the liquid cooling chamber is disposed apart from an oil suction port of the oil pump assembly.

The present disclosure also provides a steering system having an electric oil pump assembly as described in any of the above.

The advantages of the steering system and the electric oil pump assembly described above are the same as those of the prior art, and are not described herein again.

The present disclosure also provides a lubrication system having an electric oil pump assembly as described in any of the above.

The lubrication system has the same advantages as the above-mentioned electric oil pump assembly with respect to the prior art, and details are not described herein again.

The additional aspects and advantages of the present disclosure will be set forth in part in the description which follows.

DRAWINGS

1 - 38 are schematic structural views of an electric oil pump assembly according to some embodiments of the present disclosure;

Figure 39 is Figures 1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 17, 18, 19, 21, 22, 24, 26, 27, 29, 31, 32, 34, 36, 37 is a schematic cross-sectional view of the motor assembly in the embodiment shown in FIG. 37;

Figure 40 is a schematic cross-sectional view of the motor assembly of the embodiment shown in Figures 2, 6, 7, 11, 15, 16, 20, 23, 25, 28, 30, 33, 35, 38;

Figure 41 is an assembled view of the oil pump assembly of the embodiment shown in Figures 10, 11, 12, 24, 25, 34, 35;

42 is a schematic structural view of a coupling according to an embodiment of the present disclosure;

43 is a schematic structural view of a steering system according to an embodiment of the present disclosure;

44 is a schematic structural view of a lubrication system in accordance with an embodiment of the present disclosure.

Reference mark:

Steering system 1, lubrication system 2, electric oil pump assembly 1000, total oil inlet port 1010, total oil outlet port 1020, oil pump chamber 1030, oil pump chamber top wall 1031, low pressure chamber 1040; oil pump assembly 100, front cover plate 110, Card slot 111, lug 112, rear cover 120, oil pump shaft 130; motor assembly 200, front end cover 210, support flange 211, oil outlet passage 212, annular boss 213, oil passage 214, oil inlet passage 215 Motor housing 220, rear end cover 230, support base 231, stator 241, rotor 242, motor shaft 250, motor shaft oil passage 251, oil supply hole 252, liquid cooling chamber 260, rear chamber 261, circulating oil passage 262 , oil suction chamber 263, oil slinger 271; elastic member 311, positioning member 312, magnetic member 321, positioning unit 322, snap 331, hook 332, guide surface 333, threaded connection 341; coupling 410, coupling hole 411, soundproof cover 510, low pressure cover 520.

Detailed ways

The embodiments of the present disclosure are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative only, and are not to be construed as limiting.

In the description of the present disclosure, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connections, or integral connections; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal to the two elements. The specific meanings of the above terms in the present disclosure can be understood in the specific circumstances by those skilled in the art.

In some embodiments, the electric oil pump assembly includes: a motor assembly; an oil pump assembly floatingly mounted at an end of the motor assembly and coupled to the motor shaft of the motor assembly; and an elastic member elastically coupled to the motor assembly An axial preload force is applied to the oil pump assembly toward the oil pump assembly toward the motor assembly.

In some embodiments, the electric oil pump assembly further includes: a positioning member, the oil pump assembly is floatingly supported on the front end cover of the motor assembly, and the positioning member is coupled between the oil pump assembly and the front end cover and at least one of the oil pump assembly and the front end cover Fit along the radial gap.

In some embodiments, the positioning member is a bolt, and the outer circumference of the oil pump assembly is provided with a lug. The lug is provided with a positioning hole. The bolt penetrates the positioning hole and is screwed with the front end cover, and the bolt is matched with the positioning hole.

In some embodiments, the resilient member is a spring and is sleeved over the bolt, the spring resiliently abutting between the lug and the head of the bolt.

In some embodiments, at least a portion of the rim of the front cover of the oil pump assembly extends radially outward to form a lug.

In some embodiments, the lug is axially spaced from the front end cap and the resilient member is resiliently stretchably coupled between the lug and the front end cap.

In some embodiments, the positioning member and the elastic member are plural, and the plurality of positioning members are circumferentially spaced apart, and the plurality of positioning members and the plurality of elastic members are in one-to-one correspondence.

In some embodiments, the electric oil pump assembly has: an oil pump chamber, the oil pump assembly is floatingly supported on the front end cover of the motor assembly, and the oil pump assembly is installed in the oil pump chamber, and the oil pump chamber is connected to the oil discharge port of the oil pump assembly and is integrated with the electric oil pump. The total oil outlet is connected.

In some embodiments, the front end cover is provided with an oil outlet passage, one end of which is connected to the oil pump chamber and the other end forms a total oil outlet.

In some embodiments, the front end cap has an annular boss extending axially away from the motor assembly, the annular boss forming a sidewall of the oil pump chamber, the top wall of the oil pump chamber being coupled to the annular boss by a threaded fastener.

In some embodiments, the electric oil pump assembly further includes: a soundproof cover that is disposed outside the outer wall surface of the oil pump chamber.

In some embodiments, the electric oil pump assembly further includes: a low pressure cover disposed outside the wall surface of the oil pump chamber and defining a low pressure chamber communicating with the total oil inlet of the electric oil pump assembly, the low pressure cover being coupled to the front end cover .

In some embodiments, the low pressure shroud has a tapered peripheral wall and the inner diameter of the low pressure shroud tapers from a direction near the total oil inlet to a direction away from the total oil inlet.

In some embodiments, a seal ring is interposed between the oil pump assembly and the front end cover.

In some embodiments, the motor assembly and the oil pump assembly are transverse.

In some embodiments, the motor assembly includes: a motor casing, a rear end cover, a front end cover, a stator and a rotor, the oil pump assembly is floatingly supported on the front end cover, and the rear end cover closes the rear end of the motor casing to form a liquid cooling cavity, The liquid cooling chamber comprises a circulating oil passage extending in the axial direction and a rear cavity communicating with the circulating oil passage, the circulating oil passage is located between the stator and the motor casing, and the rear cavity is located at the rear end cover and the stator, the motor shaft and the rotor between.

In some embodiments, there are a plurality of circulating oil passages, and a plurality of circulating oil passages are spaced apart in the circumferential direction of the stator.

In some embodiments, the total oil inlet of the electric oil pump assembly is in communication with the liquid cooling chamber, and the liquid cooling chamber is in communication with the oil suction port of the oil pump assembly.

In some embodiments, the motor shaft oil passage is provided in the motor shaft of the motor assembly, the motor shaft oil passage is connected to the rear chamber body, and the oil suction port of the oil pump assembly is in communication with the motor shaft oil passage.

In some embodiments, the motor shaft oil passage extends in the axial direction and is open at an end remote from the oil pump assembly, and communicates with the rear chamber at one end, and has a radially extending oil supply hole for the oil hole and the oil absorption at the other end. The mouth is connected.

In some embodiments, the plurality of oil supply holes are plural, and the plurality of oil supply holes are evenly spaced apart in the circumferential direction.

In some embodiments, the front end cap has a support flange that projects axially toward the rotor of the motor assembly, the support flange is used to support the bearings of the motor assembly, and the bearings of the support flange, the motor shaft, and the motor assembly are collectively defined An oil suction chamber connected to the oil suction port, and the oil supply hole is connected to the oil suction chamber.

In some embodiments, the rear end cap has a support seat for supporting the motor shaft, and the support base is provided with an oil passage to communicate the rear cavity with the motor shaft oil passage.

In some embodiments, the front end cover is provided with a fuel passage that communicates between the circulating oil passage and the oil suction port.

In some embodiments, the front end cap has a support flange that projects axially toward the rotor of the motor assembly, the support flange is used to support the bearings of the motor assembly, and the bearings of the support flange, the motor shaft, and the motor assembly are collectively defined The oil suction chamber connected to the oil suction port passes through the support flange through the oil passage to communicate the oil suction chamber and the circulating oil passage.

In some embodiments, there are a plurality of circulating oil passages, and a plurality of circulating oil passages are circumferentially spaced apart along the stator, and at least one of the plurality of circulating oil passages flows from the rear to the front and is connected to the oil passage. .

In some embodiments, the total oil inlet is provided on the front end cover and is connected to the circulating oil passage, and an oil retaining ring is disposed between the stator and the front end cover.

In some embodiments, the total oil inlet is provided above the front end cover.

In some embodiments, the liquid cooling chamber is disposed in isolation from the oil suction port of the oil pump assembly.

The present disclosure also proposes a steering system having an electric oil pump assembly as described above.

The present disclosure also proposes a lubrication system having an electric oil pump assembly as described above.

An electric oil pump assembly 1000 in some embodiments is first described with reference to Figures 1 -42.

Embodiment 1

1, 4, 5, 10, 13, 14, 19, 21, 22, 24, 26, 27, 29, 31, 32, 34, 36, FIG. 37, FIG. 39, an electric oil pump assembly 1000 according to an embodiment of the present disclosure includes a motor assembly 200 and an oil pump assembly 100.

The oil pump assembly 100 is coupled to the motor shaft 250 for driving the motor pump assembly 100. The motor shaft 250 of the motor assembly 200 can be coupled to the oil pump shaft 130 of the oil pump assembly 100 via the coupling 410. Of course, the motor assembly 200 is not limited to directly driving the oil pump assembly 100, and may be coupled to the oil pump assembly 100 through a transmission mechanism such as a gearbox or a speed reducer.

The oil pump assembly 100 operates under the drive of the motor assembly 200 to convert low pressure oil into a high pressure oil output. The oil pump assembly 100 can be in a variety of configurations. The oil pump assembly 100 can be an external gear pump, a cycloid gear pump, a vane pump or For the plunger pump or the like, the motor assembly 200 may be various types of motors such as a synchronous motor and an asynchronous motor.

The oil pump assembly 100 is mounted at the end of the motor assembly 200, the oil pump assembly 100 can be mounted on the front end cover 210 of the motor assembly 200, the oil pump assembly 100 can be mounted directly on the front end cover 210, or the oil pump assembly 100 can pass other mounting structures (oil pump) The assembly 100 can be indirectly mounted on the front end cover 210 by a support plate member. Specifically, the front cover plate 110 of the oil pump assembly 100 can be supported on the front end cover 210 of the motor assembly 200, wherein the front cover plate 110 is the power of the oil pump assembly 100. The cover of the input end, that is, the oil pump shaft 130, projects from the front cover 110, and correspondingly, the rear cover 120 is a cover of the other end of the oil pump assembly 100.

The electric oil pump assembly 1000 has a total oil inlet port 1010 and a total oil outlet port 1020. The oil enters the electric oil pump assembly 1000 from the total oil inlet port 1010 and flows out from the total oil outlet port 1020. The oil pump assembly 100 has an oil suction port and an oil discharge port, and low pressure (normal pressure) oil is sucked into the cavity of the oil pump assembly 100 from the oil suction port, and is converted into high pressure oil to be discharged from the oil discharge port.

A motor shaft oil passage 251 is disposed in the motor shaft 250 of the motor assembly 200. The motor shaft oil passage 251 can extend along the axial direction of the motor shaft 250. The motor shaft oil passage 251 communicates with the total oil inlet port 1010, and the oil suction port of the oil pump assembly 100. It is in communication with the motor shaft oil passage 251, and the oil discharge port of the oil pump assembly 100 is in communication with the total oil outlet 1020.

That is to say, the flow path of the oil is: the total oil inlet 1010 - the motor shaft oil passage 251 - the oil suction port of the oil pump assembly 100 - the oil discharge port of the oil pump assembly 100 - the total oil outlet 1020, so that the low pressure oil can be The oil is converted into high-pressure oil, and the circulating fluid can take away the heat of the motor assembly 200 through the motor shaft 250 to ensure stable operation of the motor assembly 200. The motor assembly 200 does not need to separately set the heat dissipation unit, and can reduce the volume of the electric oil pump assembly 1000 and weight.

In some embodiments 1000, the oil absorption of the oil pump assembly 100 is achieved by providing the motor shaft oil passage 251, which helps to improve the heat dissipation performance and working stability of the electric oil pump assembly 1000, and has high integration and high light weight level.

An electric oil pump assembly 1000 according to a preferred embodiment of the present disclosure, as shown in FIGS. 1 , 4 , 5 , 10 , 13 , 14 , 19 , 21 , 22 , 24 , 26 , 27 29, FIG. 31, FIG. 32, FIG. 34, FIG. 36, FIG. 37, FIG. 39, the motor assembly 200 may include a front end cover 210, a motor case 220, a rear end cover 230, a stator 241, and a rotor 242.

The front end cover 210 is mounted at the front end of the motor casing 220, and the front end cover 210 may be connected to the front end of the motor casing 220 by a threaded fastener, the rear end cover 230 closing the rear end of the motor casing 220, and the rear end cover 230 may be threaded. The fastener is connected to the rear end of the motor casing 220. It should be noted that the front end represents the output end of the motor assembly 200 (the right end in FIGS. 1 to 38), and the rear end represents the end axially away from the output end (FIG. 1). - the left end in Figure 38).

The motor assembly 200 can have a liquid cooling chamber 260 that can communicate with the total oil inlet 1010 and the motor shaft oil passage 251 communicate with the total oil inlet 1010 through the liquid cooling chamber 260.

It can be understood that the liquid cooling chamber 260 can be a free space in the cabin of the motor assembly 200. The flow path of the oil is: the total oil inlet 1010 - the liquid cooling chamber 260 - the motor shaft oil passage 251 - the oil pump assembly 100 sucks the oil The oil discharge port of the port-oil pump assembly 100 - the total oil outlet 1020.

The compartment of the motor assembly 200 is filled with flowing oil, and the components inside the motor assembly 200 are immersed in the oil, and the stator 241 and the rotor 242 can be in full contact with the oil. Since the heat capacity of the oil is large, the stator 241 can be avoided. And the local high temperature generated by the rotor 242 due to load fluctuation, the flowing oil simultaneously provides heat dissipation and lubrication for the moving parts, ensuring stable operation of the motor assembly 200, and reducing working noise.

The rotor 242 of the motor assembly 200 can be immersed in the oil (low pressure oil), so that the oil can act to delay the rotation of the rotor 242 to buffer the sudden acceleration or sudden deceleration of the rotor 242 and the excessive inertia modulus. When the electric oil pump assembly 1000 is used in the steering system 1, the impact on the steering oil passage when the motor assembly 200 is thrown off can be prevented, the steering feel is better, and the steering wheel is not easily shaken.

The liquid cooling chamber 260 includes a circulation oil passage 262 and a rear chamber 261.

The circulating oil passage 262 is located between the stator 241 and the motor casing 220, and the circulating oil passage 262 extends along the axial direction of the motor assembly 200. As shown in FIG. 39, there may be a plurality of circulating oil passages 262, as shown in FIG. In the illustrated embodiment, there may be four circulating oil passages 262, and a plurality of circulating oil passages 262 may be arranged along the circumferential direction of the stator 241 such that the circumference of the motor assembly 200 is uniformly radiated, and the circulating oil passage 262 may be The total oil inlet 1010 is connected, and the total oil inlet 1010 may be disposed at an upper portion of the electric oil pump assembly 1000 to facilitate gas discharge when the oil flows in. The total oil inlet 1010 may be connected to the uppermost one of the oil passages 262. Connected.

The rear cavity 261 is located between the rear end cover 230 and the stator 241, the motor shaft 250 and the rotor 242. The rear cavity 261 is in communication with the circulating oil passage 262. In particular, the rear end of each of the circulating oil passages 262 may be connected to the rear cavity. 261 connected.

The motor shaft oil passage 251 extends in the axial direction, and the motor shaft oil passage 251 is open at an end remote from the oil pump assembly 100, and the motor shaft oil passage 251 is in communication with the liquid cooling chamber 260 at the end, specifically, the motor shaft oil passage 251 is The end is connected to the rear cavity 261, and the rear end cover 230 can have a support base 231 for supporting the rear end of the motor shaft 250 (through the bearing), as shown in FIG. 1, FIG. 4, FIG. 5, FIG. 13. In FIG. 14, FIG. 19, FIG. 21, FIG. 22, FIG. 24, FIG. 26, FIG. 27, FIG. 29, FIG. 31, FIG. 32, FIG. 34, FIG. 36, FIG. 37, the support base 231 may be provided. The oil passage passage connects the rear cavity 261 and the motor shaft oil passage 251, so that the relatively closed space formed by the support base 231 and the bearing can prevent the oil turbulent flow in the liquid cooling chamber 260 caused by the oil absorption of the motor shaft oil passage 251.

The other end of the motor shaft oil passage 251 (near the end of the oil pump assembly 100) is provided with a radially extending oil supply hole 252 through which the oil supply hole 252 can communicate. There may be a plurality of oil supply holes 252, and the oil supply holes 252 may be four, and the plurality of oil supply holes 252 are evenly spaced apart in the circumferential direction, so that the force of the flow of the oil on the motor shaft 250 is in the radial direction. Equalization, whereby the flow of oil in the motor shaft oil passage 251 has no effect on the rotation of the motor shaft 250.

1, 4, 5, 10, 13, 14, 19, 21, 22, 24, 26, 27, 29, 31, 32, 34, 36. As shown in FIG. 37, the front end cover 210 may have a support flange 211 protruding in the axial direction toward the rotor 242 of the motor assembly 200. The support flange 211 may be a circular ring, and the support flange 211 is used to support the motor assembly 200. The bearings, the support flange 211, the motor shaft 250, and the bearings of the motor assembly 200 collectively define an oil suction chamber 263. The oil suction chamber 263 is connected to the oil suction port, and the oil supply hole 252 is connected to the oil suction chamber 263. The oil suction chamber 263 is equivalent to providing a buffer space for the oil pump assembly 100 to absorb oil, which is convenient for the oil to be left from the oil supply hole 252 having a relatively small aperture.

An oil retaining ring 271 may be disposed between the stator 241 and the front end cover 210. The oil retaining ring 271 may be made of oil resistant material, and the oil retaining ring 271 may be linoleum, etc., as shown in FIG. 1, FIG. 4, FIG. 5, FIG. 13, 14, 19, 21, 22, 24, 26, 27, 29, 31, 32, 34, 36, and 37, the oil retaining ring 271 may be An annular shape, and the oil retaining ring 271 can be sleeved outside the support flange 211. A portion of the stator 241 close to the front end cover 210 can be sleeved outside the oil retaining ring 271, and the oil retaining ring 271 can prevent the oil pump assembly 100 from directly from the nearby cavity. The body absorbs oil so that the oil flows well throughout the motor assembly 200 to balance heat dissipation.

Of course, there may be a gap between the stator 241 and the slinger 271, and there is also a gap between the slinger 271 and the rotor 242, but the gap does not affect the overall flow direction of the oil. In this way, the overall flow path of the oil can be ensured: the total oil inlet 1010 - the circulating oil passage 262 - the rear chamber 261 - the motor shaft oil passage 251 - the oil supply hole 252 - the oil suction chamber 263 - the oil suction port of the oil pump assembly 100 - The oil discharge port of the oil pump assembly 100 - the total oil outlet 1020.

Embodiment 2

2, 6, 7, 11, 15, 15, 16, 20, 25, 28, 30, 33, 35, 38, 40, according to the present An electric oil pump assembly 1000 that discloses an embodiment includes a motor assembly 200 and an oil pump assembly 100.

The motor assembly 200 has a liquid cooling chamber 260. The liquid cooling chamber 260 can communicate with the total oil inlet 1010. The oil is sucked into the oil pump assembly 100 through the liquid cooling chamber 260. The liquid cooling chamber 260 can be a free space in the cabin of the motor assembly 200. The oil flows into the liquid cooling chamber 260 through the total oil inlet 1010, and the oil is filled in the liquid cooling chamber 260, and the components (the stator 241, the rotor 242, and the like) corresponding to the inside of the motor unit 200 are immersed in the oil.

The liquid cooling chamber 260 is filled with flowing oil, and the internal components of the motor assembly 200 are immersed in the oil, and the stator 241 and the rotor 242 can be in full contact with the oil. Since the heat capacity of the oil is large, the stator 241 and the stator 241 can be avoided. The local high temperature of the rotor 242 due to load fluctuations, the flowing oil simultaneously provides heat dissipation and lubrication for the moving parts, ensuring stable operation of the motor assembly 200, and reducing operating noise.

The liquid cooling chamber 260 includes a circulation oil passage 262 which is located between the stator 241 of the motor assembly 200 and the motor housing 220 of the motor assembly 200. It can be understood that the cavity between the motor housing 220 and the stator 241 is understood. A circulation oil passage 262 may be formed, and the circulation oil passage 262 may extend in the axial direction of the motor assembly 200. The oil suction port of the oil pump assembly 100 communicates with the circulation oil passage 262, and the oil discharge port of the oil pump assembly 100 communicates with the total oil outlet port 1020.

That is to say, the flow path of the oil is: the total oil inlet 1010 - the circulating oil passage 262 - the oil suction port of the oil pump assembly 100 - the oil discharge port of the oil pump assembly 100 - the total oil outlet 1020, so that the low pressure oil can be converted It is a high-pressure oil, and the circulating fluid can take away the heat of the motor assembly 200. In particular, a large amount of heat can be taken away by the stator 241 to ensure stable operation of the motor assembly 200. The motor assembly 200 does not need to be separately provided with a heat-dissipating unit, and the electric motor can be reduced. The volume and weight of the oil pump assembly 1000, and the formation of the circulating flow is simple and easy to manufacture.

In some embodiments 1000, the oil absorption of the oil pump assembly 100 and the heat dissipation of the motor assembly 200 are achieved by providing the circulation oil passage 262, which helps to improve the heat dissipation performance and working stability of the electric oil pump assembly 1000, and is highly integrated and light. The level of quantification is high.

An electric oil pump assembly 1000 according to a preferred embodiment of the present disclosure, as shown in FIGS. 2, 6, 7, 11, 15, 16, 20, 23, 25, 28, 30, 33 As shown in FIG. 35 and FIG. 38, the motor assembly 200 may include a front end cover 210, a motor case 220, a rear end cover 230, a stator 241, and a rotor 242.

The rear end cover 230 closes the rear end of the motor casing 220 to form the rear cavity 261 of the liquid cooling chamber 260. The number of the circulating oil passages 262 may be plural. In the embodiment shown in FIG. 40, the circulation oil passages 262 may be four. And a plurality of circulating oil passages 262 may be circumferentially spaced apart, and a plurality of circulating oil passages 262 are communicated through the rear cavity 261. The rear cavity 261 is located between the rear end cover 230 and the stator 241, the motor shaft 250 and the rotor 242. The rear cavity 261 is in communication with the circulating oil passage 262. In particular, the rear end of each of the circulating oil passages 262 may be connected to the rear cavity. 261 connected.

At least one of the plurality of circulating oil passages 262 is connected to the total oil inlet port 1010, and the oil first flows from the total oil inlet port 1010 into the circulating oil passage 262 and flows to the rear chamber 261, and at least one of the plurality of circulating oil passages 262 The oil in a circulating oil passage 262 flows from the rear to the front and is connected to the oil suction port, that is, the oil in the circulating oil passage 262 flows from the rear chamber 261 toward the front end cover 210, and then flows into the oil pump through the oil suction port. The assembly 100, as shown in FIG. 40, the oil in a portion of the plurality of circulating oil passages 262 flows from the rear to the front, and the oil in the other portion of the circulating oil passage 262 flows from the front to the rear, and the oil flows. Two circulating oil passages 262 having different flow directions are staggered in the circumferential direction. The plurality of circulating oil passages 262 may be designed in pairs, and the flow direction of the oil may be alternately designed, and the oil flows circulating in the motor casing 220 to dissipate heat from the motor assembly 200.

In a specific embodiment, one of the plurality of circulating oil passages 262 (the uppermost one of the circulating oil passages 262 in the embodiment shown in FIG. 40) is connected to the total oil inlet port 1010 to allow the oil to pass through One of the circulating oil passages 262 flows into the liquid cooling chamber 260, and the total oil inlet port 1010 may be provided at an upper portion of the electric oil pump assembly 1000 to facilitate gas discharge when the oil flows in.

As shown in FIGS. 2, 6, 7, 11, 15, 16, 20, 23, 25, 28, 30, 33, 35, and 38, the front end cover 210 can be An oil passage 214 is provided, and the circulation oil passage 262 communicates with the oil suction port through the oil passage 214.

The front end cover 210 may have a support flange 211 that protrudes axially toward the rotor 242 of the motor assembly 200. The support flange 211 may be annular, and the support flange 211 is for supporting a bearing of the motor assembly 200, and the support flange 211 The bearings of the motor shaft 250 and the motor assembly 200 together define an oil suction chamber 263. The oil suction chamber 263 is connected to the oil suction port. The oil passage 214 can penetrate the support flange 211 to communicate the oil suction chamber 263 and the circulation oil passage 262. The oil suction chamber 263 is equivalent to providing a buffer space for the oil pump assembly 100 to absorb oil. The support flange 211 and the relatively closed space formed by the bearing can prevent oil turbulence in the liquid cooling chamber 260 caused by the oil pump assembly 100 from sucking oil.

An oil retaining ring 271 may be disposed between the stator 241 and the front end cover 210. The oil retaining ring 271 may be made of oil resistant material, and the oil retaining ring 271 may be linoleum, etc., as shown in FIG. 2, FIG. 6, FIG. 7, FIG. As shown in FIG. 15, FIG. 16, FIG. 20, FIG. 23, FIG. 25, FIG. 28, FIG. 30, FIG. 33, FIG. 35, FIG. 38, the oil retaining ring 271 may be annular and sleeved outside the support flange 211, and the stator A portion of the 241 near the front end cover 210 may be sleeved outside the oil retaining ring 271. The oil retaining ring 271 prevents the oil pump assembly 100 from directly sucking oil from the nearby cavity, so that the oil flows well throughout the motor assembly 200. Balance the heat. It should be noted that the area of the oil slinger 271 corresponding to the oil passage 214 can be hollowed out to prevent the oil slinger 271 from impeding the oil pump assembly 100 from sucking through the oil passage 214.

Of course, there may be a gap between the stator 241 and the slinger 271, and there is also a gap between the slinger 271 and the rotor 242, but the gap does not affect the overall flow direction of the oil. In this way, the overall flow path of the oil can be ensured: the total oil inlet 1010 - the circulating oil passage 262 - the rear chamber 261 - the circulating oil passage 262 - the oil passage 214 - the oil suction chamber 263 - the oil suction port of the oil pump assembly 100 - the oil pump The oil drain port of the assembly 100 - the total oil outlet 1020.

Embodiment 3

As shown in FIGS. 3, 8, 9, 12, 17, and 18, an electric oil pump assembly 1000 according to an embodiment of the present disclosure includes a motor assembly 200 and an oil pump assembly 100.

The motor assembly 200 of the electric oil pump assembly 1000 has an oil pump chamber 1030. The front end cover 210 of the motor assembly 200 defines an oil pump chamber 1030 that is not limited solely by the front end cover 210. The front end cover 210 may only define a portion of the oil pump chamber 1030. The wall, the compartment of the motor assembly 200 is isolated from the oil pump chamber 1030, and the compartment of the motor assembly 200 and the oil pump chamber 1030 are blocked by the front end cover 210 of the motor assembly 200. The motor assembly 200 may be liquid-cooled (oil-cooled), and the cooling oil of the motor assembly 200 is separated from the oil of the oil pump assembly 100. The motor assembly 200 may have a liquid cooling chamber 260, a liquid cooling chamber 260 and an oil pump assembly 100. The isolation, in particular, the liquid cooling chamber 260 and the oil pump assembly 100 can be isolated by the front end cover 210.

The oil pump assembly 100 is located in the oil pump chamber 1030. The oil suction port of the oil pump assembly 100 is in communication with the total oil inlet port 1010. The oil discharge port of the oil pump assembly 100 communicates with the total oil outlet port 1020, and the total oil inlet port 1010 and the total oil outlet port 1020 are One of them is in communication with the oil pump chamber 1030.

Thus, the periphery of the oil pump assembly 100 is surrounded by oil, and the vibration noise of the oil pump assembly 100 can be absorbed by the oil in the oil pump chamber 1030 and reflected by the wall surface of the oil pump chamber 1030 to reduce the operating noise of the electric oil pump assembly 1000.

In some embodiments 1000, by providing a relatively independent oil pump chamber 1030, the operating noise of the oil pump assembly 100 can be effectively absorbed, and the pump oil of the oil pump assembly 100 is not interfered by the flow of oil within the motor assembly 200, the electric oil pump The pumping capacity of the assembly 1000 is higher and the work is stable.

The oil pump chamber 1030 according to an alternative embodiment of the present disclosure is in communication with the total oil inlet 1010. As shown in FIG. 18, the oil suction port of the oil pump assembly 100 may be connected to the oil pump chamber 1030, and the oil pump chamber 1030 is connected to the total oil inlet 1010. The oil suction port of the oil pump assembly 100 can communicate with the total oil inlet 1010 through the oil pump chamber 1030, and the oil discharge port of the oil pump assembly 100 communicates with the total oil outlet 1020.

The front end cover 210 may be provided with an oil outlet passage 212. One end of the oil discharge passage 212 is connected to the oil discharge port of the oil pump assembly 100, and the other end of the oil discharge passage 212 forms a total oil outlet port 1020. The front end cover 210 is also provided with an oil inlet passage. 215, the total oil inlet port 1010 and the oil pump chamber 1030 are in communication through the oil inlet passage 215.

The flow path of the oil is: total oil inlet 1010 - oil inlet passage 215 - oil pump chamber 1030 - oil suction port of oil pump assembly 100 - oil discharge port of oil pump assembly 100 - oil outlet passage 212 - total oil outlet port 1020, thus The low pressure oil can be converted into a high pressure oil, and the periphery of the oil pump assembly 100 is wrapped by the low pressure oil, and the vibration noise of the oil pump assembly 100 can be absorbed by the low pressure oil in the oil pump chamber 1030 and reflected by the wall surface of the oil pump chamber 1030 to reduce the total electric oil pump. Working noise of 1000.

The pressure of the oil pump chamber 1030 is small, which is convenient for sealing. The wall surface of the oil pump chamber 1030 does not have the function of a high pressure container, and is not limited by the influence of strength, and provides a possibility of lightweight design. The wall surface of the oil pump chamber 1030 can be set thin. The wall surface of the oil pump chamber 1030 can be made of thin-walled metal to reduce the footprint and weight of the electric oil pump assembly 1000.

The oil pump chamber 1030 according to an alternative embodiment of the present disclosure is in communication with the total oil inlet 1010. As shown in FIGS. 3, 8, 9, 12, and 17, the oil pump chamber 1030 is connected to the oil discharge port of the oil pump assembly 100. The oil pump chamber 1030 is in communication with the total oil outlet 1020. The oil discharge port of the oil pump assembly 100 can communicate with the total oil outlet 1020 through the oil pump chamber 1030. The oil suction port of the oil pump assembly 100 communicates with the total oil inlet 1010.

The front end cover 210 is provided with an oil outlet passage 212 and an oil inlet passage 215. One end of the oil discharge passage 212 is connected to the oil pump chamber 1030, and the other end of the oil discharge passage 212 forms a total oil outlet 1020, and one end of the oil inlet passage 215 and the total inlet The oil port 1010 is in communication, and the other end of the oil inlet passage 215 is connected to the oil suction port.

The flow path of the oil is: total oil inlet port 1010 - oil inlet passage 215 - oil suction port of oil pump assembly 100 - oil discharge port of oil pump assembly 100 - oil pump chamber 1030 - oil outlet passage 212 - total oil outlet port 1020, thus Low pressure oil can be converted to high pressure oil.

On the one hand, the periphery of the oil pump assembly 100 is wrapped by high pressure oil, and the vibration noise of the oil pump assembly 100 can be absorbed by the high pressure oil in the oil pump chamber 1030 and reflected by the wall surface of the oil pump chamber 1030 to reduce the operating noise of the electric oil pump assembly 1000.

On the other hand, the oil pump chamber 1030 can function to eliminate oil pulsation and perform fluid silencing, and the elimination of various frequency noise can be achieved by designing the size of the oil pump chamber 1030.

In another aspect, the high pressure oil of the oil pump chamber 1030 can apply an axial thrust P to the oil pump assembly 100, and the pressure applied by the high pressure oil to the rear cover 120 of the oil pump assembly 100 can support the oil pump assembly 100 at the front end cover of the motor assembly 200. 210, such that the oil pump assembly 100 can be subjected to additional axial forces during operation, the manner of fixing the oil pump assembly 100 is lessened, and the oil pump assembly 100 can remain relatively stable and fixed during operation.

Embodiment 4

As shown in FIGS. 1, 2, 3, 19, 20, 29, and 30, an electric oil pump assembly 1000 according to an embodiment of the present disclosure includes a motor assembly 200, an oil pump assembly 100, and an elastic member 311.

The oil pump assembly 100 is floatingly mounted at the end of the motor assembly 200. The oil pump assembly 100 can be floatingly mounted on the front end cover 210 of the motor assembly 200. The oil pump assembly 100 can be directly floatingly mounted on the front end cover 210, or the oil pump assembly 100 can be installed by other means. The structure (the oil pump assembly 100 may be indirectly floatingly mounted on the front end cover 210 by the support plate member), in particular, the front cover plate 110 of the oil pump assembly 100 may be supported on the front end cover 210 of the motor assembly 200, wherein the front cover plate 110 is an oil pump The cover of the power input end of the assembly 100, that is, the oil pump shaft 130, projects from the front cover 110, and correspondingly, the rear cover 120 is a cover of the other end of the oil pump assembly 100.

The elastic member 311 is elastically connected between the motor assembly 200 and the oil pump assembly 100. The oil pump assembly 100 is floatingly mounted on the front end cover 210. The elastic member 311 can be elastically coupled between the front end cover 210 and the oil pump assembly 100 to apply to the oil pump assembly 100. The axial preload force toward the motor assembly 200, or the elastic member 311 is in contact with or connected to the oil pump assembly 100 to apply an axial preload force to the oil pump assembly 100 that causes the oil pump assembly 100 to be floatingly supported on the front end cover 210 of the motor assembly 200.

The oil pump assembly 100 is pre-compressed on the front end cover 210 of the motor assembly 200 by the elastic force of the elastic member 311, and the elastic member 311 can be axially coupled to the housing of the oil pump assembly 100 and the motor assembly 200. Between the front end covers 210, the housing of the oil pump assembly 100 may be provided with lugs 112 protruding outward in the radial direction. The lugs 112 and the front end cover 210 may be axially spaced apart, and the elastic members 311 may be elastically stretched. It is connected between the lug 112 and the front end cover 210, or the elastic member 311 may be compression-connected between the housing of the oil pump assembly 100 and the front end cover 210 of the motor assembly 200 in the axial direction.

The elastic preload of the elastic member 311 to the oil pump assembly 100 causes the oil pump assembly 100 to be pre-compressed on the front end cover 210 of the motor assembly 200, ensuring the tightness of the oil pump assembly 100, and does not need to be performed on the oil pump assembly 100 during assembly. The bolt is locked with a large torque, and the pre-tightening force provided by the elastic member 311 only needs to ensure that the oil pump assembly 100 is installed, so that the working friction force of the oil pump assembly 100 can be reduced, the working energy efficiency of the oil pump assembly 100 can be improved, and the mechanical mechanism of the oil pump assembly 100 can be improved. higher efficiency.

Since the oil pump assembly 100 is suspended and does not need to be bolted to the housing, the oil pump assembly 100 can have a certain amount of movement in the radial direction and the axial direction under the application of a certain force. The motor shaft 250 of the motor assembly 200 is provided. When rotating, the oil pump shaft 130 of the oil pump assembly 100 can be adaptively centered, effectively avoiding noise caused by the misalignment of the motor shaft 250, the coupling 410, and the oil pump shaft 130, and due to the characteristics of the adaptive centering. The machining accuracy requirements of the machining motor shaft 250, the coupling 410 and the oil pump shaft 130 can be reduced to reduce the processing cost and assembly precision requirements of the electric oil pump assembly 1000.

The output pulse of the oil pump assembly 100 can overcome the elastic force of the elastic member 311 to axially displace the oil pump assembly 100 to reduce or even eliminate the output pulse of the oil pump assembly 100.

In some embodiments 1000, by pre-installing the oil pump assembly 100 by providing the elastic member 311, and floating the oil pump assembly 100, the working friction of the oil pump assembly 100 can be reduced, the working energy efficiency of the oil pump assembly 100 can be improved, and the oil pump assembly 100 can be lowered. The output pulse, and the electric oil pump assembly 1000 has the characteristics of adaptive alignment, which can reduce the machining accuracy and assembly precision requirements of the electric oil pump assembly 1000.

According to a preferred embodiment of the present invention, the electric oil pump assembly 1000, as shown in FIGS. 1, 2, 3, 19, 20, 29, and 30, the electric oil pump assembly 1000 may further include: a positioning member 312 The positioning member 312 is coupled between the oil pump assembly 100 and the front end cover 210, and the positioning member 312 is radially-engaged with at least one of the oil pump assembly 100 and the front end cover 210 of the motor assembly 200.

In an alternative embodiment, the positioning member 312 can be fixedly coupled to the oil pump assembly 100 (without radial clearance activity) and the positioning member 312 can be radially spaced into engagement with the front end cover 210; in another alternative embodiment The positioning member 312 can be engaged with the oil pump assembly 100 in a radial clearance, and the positioning member 312 can be fixedly coupled to the front end cover 210 (without radial clearance activity); in an alternative embodiment, the positioning member 312 can be coupled to the oil pump. The assembly 100 is mated with a radial clearance and the positioning member 312 can be radially spaced into engagement with the front end cover 210.

The positioning member 312 is used for pre-positioning and transmitting torque. According to the clearance fit of the positioning member 312 with the oil pump assembly 100 or the front end cover 210, the radial floating stroke of the oil pump assembly 100 can be defined, and the oil pump assembly 100 is always at the radial center. Near the district.

Specifically, the positioning member 312 can be a bolt, and the outer circumference of the oil pump assembly 100 can be provided with a lug 112. The lug 112 can be provided with a positioning hole, the bolt penetrates the positioning hole, and the bolt is screwed with the front end cover 210, and the bolt and the positioning hole are gapped. Cooperate so that the oil pump assembly 100 can be radially floated. Thus, the positioning member 312 is axially fixed relative to the motor assembly 200, is not easily detached, and the transmission torque is more stable.

The elastic member 311 may be a spring, and the elastic member 311 is sleeved outside the bolt, and the spring elastically stops between the lug 112 and the head of the bolt. During operation of the electric oil pump assembly 1000, the lug 112 can stop against the spring, and under the force of the oil pump assembly 100, the oil pump assembly 100 can be axially floated to further compress the spring toward the head of the bolt or Reduce the compression range.

The lugs 112 are formed in a plurality of manners, and at least a portion of the edges of the front cover 110 of the oil pump assembly 100 extend radially outward to form the lugs 112 such that the lugs 112 substantially conform to the front end cover 210 of the motor assembly 200. The pre-installation of the oil pump assembly 100 is more stable.

Alternatively, the lug 112 can be axially spaced from the front end cover 210, and at least a portion of the rim of the circumferential housing of the oil pump assembly 100 extends radially outwardly to form a lug 112, in this embodiment, the resilient member 311 It can be elastically stretched between the lug 112 and the front end cover 210. Of course, the elastic member 311 can also be elastically restrained between the lug 112 and the head of the bolt as described in the above embodiment.

The positioning member 312 and the elastic member 311 may each be plural, and the plurality of lugs 112 are also arranged. The plurality of lugs 112 are circumferentially spaced apart, and the plurality of positioning members 312 may be arranged along the circumferential direction of the oil pump assembly 100. The plurality of elastic members 311 may be arranged along the circumferential direction of the oil pump assembly 100. Preferably, the lugs 112 may be evenly spaced apart in the circumferential direction, the plurality of positioning members 312, the plurality of elastic members 311, and the plurality of lugs 112. A correspondence. Thus, the pre-mounting force of the oil pump assembly 100 in each direction in the circumferential direction is relatively uniform, and the oil pump assembly 100 is uniformly aligned when floating in the axial direction, and the constraints received in the respective directions are relatively balanced when floating in the radial direction.

Embodiment 5

As shown in FIGS. 4-9, 21-23, 31-33, an electric oil pump assembly 1000 according to an embodiment of the present disclosure includes a motor assembly 200, an oil pump assembly 100, and a magnetic member 321.

The oil pump assembly 100 is radially mounted on the end of the motor assembly 200, and the oil pump assembly 100 can be mounted on the front end cover 210 of the motor assembly 200 in a radial direction. The oil pump assembly 100 can be directly mounted on the front end cover 210 in a radial direction. Or the oil pump assembly 100 may be mounted on the front end cover 210 in a radially floating manner by other mounting structures (the oil pump assembly 100 may be supported by the support plate member). Specifically, the front cover plate 110 of the oil pump assembly 100 may be supported by the motor assembly 200. The front cover 210 is a cover plate of the power input end of the oil pump assembly 100, that is, the oil pump shaft 130 protrudes from the front cover 110. Correspondingly, the rear cover 120 is a cover plate at the other end of the oil pump assembly 100.

The magnetic member 321 is used to apply an axial magnetic force to the oil pump assembly 100 to support the oil pump assembly 100 in the radial direction at the end of the motor assembly 200. The oil pump assembly 100 is radially supported on the front end cover 210, and the magnetic member 321 Can be a permanent magnet. The magnetic member 321 may be fixedly coupled to the motor assembly 200, and the oil pump assembly 100 may be radially mounted to the end of the motor assembly 200 (front end cover 210) by magnetic attraction to the oil pump assembly 100, or the magnetic member 321 may be coupled to the oil pump assembly. 100 is fixedly coupled, and the oil pump assembly 100 is radially mounted to the end of the motor assembly 200 (front end cover 210) by magnetic attraction to the motor assembly 200, or the magnetic member 321 is magnetically attracted to the oil pump assembly 100 and the motor The magnetic attraction of the assembly 200 causes the oil pump assembly 100 to be mounted in the radial direction at the end of the motor assembly 200 (the front end cover 210).

The oil pump assembly 100 is mounted on the motor assembly 200 in a radial direction, and does not need to be bolted with a large torque on the oil pump assembly 100 during assembly. The pre-tightening magnetic force provided by the magnetic member 321 only needs to ensure that the oil pump assembly 100 is installed. This can reduce the working friction of the oil pump assembly 100, improve the working energy efficiency of the oil pump assembly 100, and the mechanical efficiency of the oil pump assembly 100 is higher.

Since the magnetic attraction is not a mandatory limit, the oil pump assembly 100 is suspended and does not need to be bolted to the housing. Under the application of a certain force, the oil pump assembly 100 can have a certain amount of movement in the radial direction, in the motor assembly 200. When the motor shaft 250 rotates, the oil pump shaft 130 of the oil pump assembly 100 can be adaptively centered, effectively avoiding noise caused by the difference between the motor shaft 250, the coupling 410 and the oil pump shaft 130, and is adaptive. The characteristics of the core can reduce the processing precision requirements for the machining motor shaft 250, the coupling 410 and the oil pump shaft 130, and reduce the processing cost and assembly precision requirements of the electric oil pump assembly 1000.

In some embodiments 1000, by pre-installing the oil pump assembly 100 by providing the magnetic member 321 and floatingly mounting the oil pump assembly 100, the working friction force of the oil pump assembly 100 can be reduced, the working energy efficiency of the oil pump assembly 100 can be improved, and the electric oil pump assembly can be improved. The 1000 has an adaptive alignment feature that reduces the machining accuracy and assembly accuracy requirements of the electric oil pump assembly 1000.

According to a preferred embodiment of the present invention, the electric oil pump assembly 1000, as shown in FIGS. 4, 6, 8, 21, 23, 31, and 33, the magnetic member 321 may be coupled to the front cover of the oil pump assembly 100. 110. One of the front end covers 210 is connected, and the other of the front cover 110 and the front end cover 210 may be made of a ferromagnetic material.

Optionally, a recess corresponding to the magnetic member 321 is disposed on the other of the front cover 110 and the front end cover 210, and at least a portion of the magnetic member 321 protrudes from both the front cover 110 and the front end cover 210. One of them is engaged with the groove in a radial gap, and the remaining portion of the magnetic member 321 is embedded in one of the front cover 110 and the front end cover 210.

The magnetic member 321 can be fixedly connected to the front cover 110 of the oil pump assembly 100. A part of the magnetic member 321 is embedded in the front cover 110, and another portion protrudes from the front cover 110. The front end cover 210 of the motor assembly 200 can be provided with magnetic a corresponding recess of the member 321 , a portion of the magnetic member 321 protruding from the front cover 110 can extend into the recess and fit radially with the recess, and the front end cover 210 of the motor assembly 200 can be made of a ferromagnetic material. The front end cover 210 may be a carbon steel material.

Alternatively, the magnetic member 321 may be fixedly coupled to the front end cover 210 of the motor assembly 200, a portion of the magnetic member 321 is embedded in the front end cover 210, and the other portion is protruded from the front end cover 210. The front cover 110 of the oil pump assembly 100 may be provided with magnetic The groove corresponding to the piece 321 , the portion of the magnetic member 321 protruding from the front end cover 210 can extend into the groove and fit radially with the groove, and the front cover 110 of the oil pump assembly 100 can be made of ferromagnetic material. The front end cover 210 may be a carbon steel material.

Optionally, the other of the front cover 110 and the front end cover 210 is provided with a boss corresponding to the magnetic member 321 , and the magnetic member 321 is provided with a groove, and the boss protrudes into the groove and the groove Fit along the radial gap.

The magnetic member 321 can be fixedly connected to the front cover 110 of the oil pump assembly 100. The front end cover 210 of the motor assembly 200 can be provided with a boss corresponding to the magnetic member 321, and the magnetic member 321 is provided with a concave corresponding to the boss. The groove, the boss can extend into the groove and cooperate with the groove in a radial gap. The front end cover 210 of the motor assembly 200 can be made of a ferromagnetic material, and the front end cover 210 can be a carbon steel material.

Alternatively, the magnetic member 321 can be fixedly connected to the front end cover 210 of the motor assembly 200. The front cover 110 of the oil pump assembly 100 can be provided with a boss corresponding to the magnetic member 321 , and the magnetic member 321 is provided corresponding to the boss. The groove may protrude into the groove and cooperate with the groove in a radial gap. The front cover 110 of the oil pump assembly 100 may be made of a ferromagnetic material, and the front end cover 210 may be a carbon steel material.

It can be understood that the magnetic member 321 can be used for pre-positioning and transmitting torque, and according to the clearance fit of the magnetic member 321 and the corresponding boss or groove, the radial floating stroke of the oil pump assembly 100 can be defined, and the oil pump assembly can be guaranteed. 100 is always near the radial center zone.

The magnetic member 321 may be plural, and the plurality of magnetic members 321 are circumferentially spaced apart. Preferably, the magnetic members 321 may be evenly spaced apart in the circumferential direction between the front end cover 210 and the front cover 110. Thus, the pre-mounting force of the oil pump assembly 100 in each direction in the circumferential direction is relatively balanced, and when it is floated in the radial direction, the constraints received in each direction are also balanced.

According to another preferred embodiment of the present disclosure, an electric oil pump assembly 1000, as shown in FIG. 5, FIG. 7, FIG. 9, FIG. 22, FIG. 32, an electric oil pump assembly 1000 has an oil pump chamber 1030, and the oil pump assembly 100 is mounted on the oil pump In the chamber 1030, the oil pump chamber 1030 is connected to the oil discharge port of the oil pump assembly 100, and the oil pump chamber 1030 is in communication with the total oil outlet 1020.

Thus, on the one hand, the periphery of the oil pump assembly 100 is wrapped by high pressure oil, and the vibration noise of the oil pump assembly 100 can be absorbed by the high pressure oil in the oil pump chamber 1030 and reflected by the wall surface of the oil pump chamber 1030 to reduce the operating noise of the electric oil pump assembly 1000. .

In another aspect, the high pressure oil of the oil pump chamber 1030 can apply an axial thrust to the oil pump assembly 100, and the pressure applied by the high pressure oil to the rear cover 120 of the oil pump assembly 100 can support the oil pump assembly 100 at the front end cover 210 of the motor assembly 200. In this way, the oil pump assembly 100 can be subjected to additional axial forces during operation, and the oil pump assembly 100 can remain relatively stable and fixed during operation.

The oil pump assembly 100 and the front end cover 210 may be pre-positioned by the positioning unit 322, and the positioning unit 322 is radially engaged with at least one of the oil pump assembly 100 and the front end cover 210, the rear cover 120 of the oil pump assembly 100 and the oil pump chamber. The top wall 1031 of the 1030 is provided with magnetic members 321 having opposite magnetic pole directions.

The positioning unit 322 can be radially-engaged with the front cover 110 of the oil pump assembly 100, the positioning unit 322 can be embedded in the front end cover 210; or the positioning unit 322 can be radially-engaged with the front end cover 210, and the positioning unit 322 can be embedded in the oil pump assembly The front cover 110 of 100; or in the embodiment shown in FIG. 5, FIG. 7, FIG. 9, FIG. 22, FIG. 32, the positioning unit 322 can be radially matched with the front cover 110 of the oil pump assembly 100, and positioned. Unit 322 can be radially gap-fitted with front end cover 210. The positioning unit 322 can be a cylindrical pin.

It should be noted that the magnetic member 321 on the rear cover 120 of the oil pump assembly 100 can be embedded in the rear cover 120, and the magnetic member 321 on the top wall 1031 of the oil pump chamber 1030 can be embedded in the top wall 1031 of the oil pump chamber 1030. The same magnetic poles of the magnetic member 321 of the position are oppositely disposed, N pole to N pole, S pole to S pole, preferably, the magnetic members 321 of the two positions are disposed opposite to each other, of course, if the rear cover of the oil pump assembly 100 The 120 and the front end cover 210 are made of a ferromagnetic material, and the magnetic members 321 at these two positions may also be staggered.

The magnetic member 321 may be plural, and the plurality of magnetic members 321 are circumferentially spaced apart. Preferably, the magnetic members 321 may be evenly spaced circumferentially between the rear cover 120 and the top wall 1031 of the oil pump chamber 1030. . Thus, the pre-mounting force of the oil pump assembly 100 in each direction in the circumferential direction is relatively balanced, and when it is floated in the radial direction, the constraints received in each direction are also balanced.

Embodiment 6

As shown in FIGS. 10-12, 24, 25, 34, 35, and 41, an electric oil pump assembly 1000 according to an embodiment of the present disclosure includes a motor assembly 200, an oil pump assembly 100, and a buckle 331.

The electric oil pump assembly 1000 has a total oil inlet port 1010 and a total oil outlet port 1020. The oil enters the electric oil pump assembly 1000 from the total oil inlet port 1010 and flows out of the total oil outlet port 1020. The oil pump assembly 100 has an oil suction port and an oil discharge port, and low pressure (normal pressure) oil is sucked into the cavity of the oil pump assembly 100 from the oil suction port, and is converted into high pressure oil to be discharged from the oil discharge port.

The oil pump assembly 100 is floatingly mounted at an end of the motor assembly 200, the snap 331 is coupled between the oil pump assembly 100 and the motor assembly 200, and one of the oil pump assembly 100 and the motor assembly 200 is in clearance fit with the buckle 331, the oil pump assembly 100 and The other of the motor assemblies 200 is fixedly coupled to the buckle 331 to allow the oil pump assembly 100 to be floatingly supported on the motor assembly 200.

The oil pump assembly 100 is floatingly mounted on the front end cover 210, and the buckle 331 is connected between the oil pump assembly 100 and the front end cover 210, and one of the oil pump assembly 100 and the front end cover 210 is in clearance fit with the buckle 331, the oil pump assembly 100 and the front end cover The other of the 210 is fixedly coupled to the buckle 331 to allow the oil pump assembly 100 to be floatingly supported on the front end cover 210.

The buckle 331 can be fixedly connected to the front cover 110 of the oil pump assembly 100. One end of the buckle 331 is embedded in the front cover 110, and the buckle 331 is in clearance with the front end cover 210 of the motor assembly 200. Alternatively, the buckle 331 can be combined with the motor assembly. The front end cover 210 of the 200 is fixedly connected, and one end of the buckle 331 is embedded in the front end cover 210, and the buckle 331 is in clearance fit with the front cover 110 of the oil pump assembly 100.

The buckle 331 is connected between the front end cover 210 and the oil pump assembly 100 to achieve the functions of limiting, prepositioning and transmitting torque, wherein the limit includes axial and radial limits, which need to be described herein. The limit is not necessarily limited to jamming, but rather limits the amount of movement of the oil pump assembly 100 in the axial and/or radial directions.

The oil pump assembly 100 is pre-mounted on the front end cover 210 of the motor assembly 200 under the axial limit of the buckle 331, and does not require a large torque locking of the bolt on the oil pump assembly 100 during assembly, and the preload of the buckle 331 is provided. The force or pre-limit only needs to ensure that the oil pump assembly 100 is installed, which can reduce the working friction of the oil pump assembly 100, improve the working energy efficiency of the oil pump assembly 100, and the mechanical efficiency of the oil pump assembly 100 is higher.

Since the oil pump assembly 100 is suspended and does not need to be bolted to the housing, the oil pump assembly 100 can have a certain amount of movement in the radial direction and the axial direction under the application of a certain force. The motor shaft 250 of the motor assembly 200 is provided. When rotating, the oil pump shaft 130 of the oil pump assembly 100 can be adaptively centered, effectively avoiding noise caused by the misalignment of the motor shaft 250, the coupling 410, and the oil pump shaft 130, and due to the characteristics of the adaptive centering. The machining accuracy requirements of the machining motor shaft 250, the coupling 410 and the oil pump shaft 130 can be reduced, and the processing cost and assembly precision requirement of the electric oil pump assembly 1000 can be reduced.

The output pulse of the oil pump assembly 100 can overcome the spring force of the buckle 331 to axially displace the oil pump assembly 100 to reduce or even eliminate the output pulse of the oil pump assembly 100.

In some embodiments 1000, by pre-installing the oil pump assembly 100 by providing the buckle 331 and floating the oil pump assembly 100, the working friction of the oil pump assembly 100 can be reduced, the working energy efficiency of the oil pump assembly 100 can be improved, and the oil pump assembly 100 can be lowered. The output pulse, and the electric oil pump assembly 1000 has the characteristics of adaptive alignment, which can reduce the machining accuracy and assembly precision requirements of the electric oil pump assembly 1000.

An electric oil pump assembly 1000 according to a preferred embodiment of the present disclosure, as shown in FIGS. 10-12, 24, 25, 34, 35, and 41, one end of the buckle 331 is fixedly coupled to the front end cover 210, The end of the buckle 331 can be embedded in the front end cover 210. The other end of the buckle 331 is provided with a hook 332. The hook 332 is engaged with the front cover 110 of the oil pump assembly 100, and the hook 332 is axially facing the front cover. Plate 110 is limited. At least a portion of the hook 332 may coincide with at least a portion of the front cover 110 in an axial movement path of the oil pump assembly 100.

Specifically, as shown in FIG. 41, the front cover 110 may be provided with a latching slot 111. The latching slot 111 may be annular (circular, square, or other shape), or the latching slot 111 may be The gap in the embodiment shown in Fig. 41.

The buckle 331 extends through the engaging groove 111, and the buckle 331 is loosely engaged with the engaging groove 111. Thus, the oil pump assembly 100 can float in the radial direction, that is, there is a certain amount of movement in the radial direction, and the motor shaft of the motor assembly 200 When the 250 is rotated, the oil pump shaft 130 of the oil pump assembly 100 can be adaptively centered, effectively avoiding noise caused by the distraction of the motor shaft 250, the coupling 410, and the oil pump shaft 130.

The end surface of the hook 332 facing the front end cover 210 is clearance-fitted with the front cover 110 of the oil pump assembly 100 such that the oil pump assembly 100 has a slight floating amount in the axial direction, and the oil pump assembly 100 is not stuck in the axial direction, and does not hinder The oil pump assembly 100 is radially floating, and since the installation pressure between the oil pump assembly 100 and the motor assembly 200 is small, the working friction of the oil pump assembly 100 can be reduced, the working energy efficiency of the oil pump assembly 100 can be improved, and the mechanical efficiency of the oil pump assembly 100 can be improved. high.

The rim of the front cover 110 has a lug 112 protruding outward in the radial direction. The engaging groove 111 is disposed on the lug 112. The engaging groove 111 may be a closed ring on the lug 112 or may be in the lug 112. A slit is formed to form an end surface of the hook 332 facing the front end cover 210 opposite to a surface of the lug 112 facing away from the front end cover 210. The hook 332 has a guiding surface 333, and the guiding surface 333 is along the radial direction of the front cover 110. The inner and outer sides are inclined away from the front end cover 210, and the guide surface 333 may be a sloped surface.

The buckle 331 can be substantially rod-shaped, so that the buckle 331 is more elastic in the radial direction, and the buckle 331 can be made of a plastic member or a metal having a certain elasticity.

As shown in FIG. 41, when the oil pump assembly 100 is installed, the edge of the engaging groove 111 facing the front end cover 210 acts on the guiding surface 333 on the hook 332, and the buckle 331 is elastically deformed and bent outward, and the engaging groove 111 is crossed. After the barbs of the buckles 331 are rebounded, the buckles 331 are rebounded, and the front cover 110 of the oil pump assembly 100 is restrained by the hooks 332. The oil pump assembly 100 is relatively fixed, and the buckles 331 and the snap grooves 111 are in a clearance fit. The oil pump assembly 100 has a certain amount of movement space in the radial direction and the axial direction, and the oil pump assembly 100 can have a certain amount of movement in the radial direction and the axial direction under a certain external force.

As shown in FIG. 41, the buckle 331 may be plural, and the plurality of lugs 112 are also plural. The plurality of lugs 112 are circumferentially spaced apart, and the plurality of buckles 331 are circumferentially spaced apart, preferably convex. The ears 112 may be evenly spaced apart in the circumferential direction, and the plurality of buckles 331 and the plurality of lugs 112 are in one-to-one correspondence. Thus, the pre-mounting force of the oil pump assembly 100 in each direction in the circumferential direction is relatively uniform, and the oil pump assembly 100 is uniformly aligned when floating in the axial direction, and the constraints received in the respective directions are relatively balanced when floating in the radial direction.

Example 7

As shown in FIGS. 13-18, 26-28, 36-38, an electric oil pump assembly 1000 according to an embodiment of the present disclosure includes a motor assembly 200 and an oil pump assembly 100.

The motor assembly 200 has an oil pump chamber 1030. The motor assembly 200 includes a front end cover 210. The front end cover 210 can be used to define an oil pump chamber 1030. The oil pump chamber 1030 is filled with oil. The oil pump chamber 1030 is not limited only by the front end cover 210. The cover 210 may define only a portion of the wall surface of the oil pump chamber 1030.

The oil pump assembly 100 is fixedly coupled to the motor assembly 200. The oil pump assembly 100 can be fixedly coupled to the front end cover 210 of the motor assembly 200. The oil pump assembly 100 is located in the oil pump chamber 1030. The oil suction port of the oil pump assembly 100 communicates with the total oil inlet port 1010. The oil pump assembly The oil discharge port of 100 is in communication with the total oil outlet 1020.

In some embodiments 1000, the periphery of the oil pump assembly 100 is surrounded by oil, and the vibration noise of the oil pump assembly 100 can be absorbed by the oil in the oil pump chamber 1030 and reflected by the wall surface of the oil pump chamber 1030 to reduce the electric oil pump assembly 1000. Working noise.

As shown in FIG. 13 to FIG. 16, FIG. 26 to FIG. 28, and FIG. 36 to FIG. 38, the motor assembly 200 may further have a liquid cooling chamber 260. The liquid cooling chamber 260 is in communication with the total oil inlet port 1010, and the liquid cooling chamber 260 may be The vacant space in the compartment of the motor assembly 200, the oil flows into the liquid cooling chamber 260 through the total oil inlet 1010, and the oil is filled in the liquid cooling chamber 260, which corresponds to the internal components of the motor assembly 200 (stator 241, rotor 242, etc.) Soaked in oil.

The oil suction port of the oil pump assembly 100 is in communication with the liquid cooling chamber 260, and the oil discharge port of the oil pump assembly 100 is in communication with the total oil outlet port 1020.

That is to say, the flow path of the oil is: the total oil inlet 1010 - the liquid cooling chamber 260 - the oil suction port of the oil pump assembly 100 - the oil discharge port of the oil pump assembly 100 - the total oil outlet 1020, so that the low pressure oil can be converted It is a high-pressure oil, and the circulating fluid can take away the heat of the motor assembly 200 to ensure stable operation of the motor assembly 200. The motor assembly 200 does not need to separately provide a heat-dissipating unit, and can reduce the volume and weight of the electric oil pump assembly 1000, and circulates the flow. The formation is simple and easy to manufacture.

In some embodiments 1000, the oil suction of the oil pump assembly 100 and the heat dissipation of the motor assembly 200 are achieved by providing a liquid cooling chamber 260 in communication with the oil pump assembly 100, which helps to improve the heat dissipation performance and operational stability of the electric oil pump assembly 1000. The integration level is high and the level of light weight is high.

In a specific embodiment, as shown in FIGS. 13-18, 26-28, 36-38, the oil pump assembly 100 and the front end cover 210 may be fixedly coupled by a threaded connection 341. The rim of the front cover 110 of the oil pump assembly 100 has a lug 112 that projects radially outwardly, and the threaded connection 341 extends through the lug 112 and is threadedly coupled to the front end cap 210.

Thus, the connection of the oil pump assembly 100 to the motor assembly 200 is firm and convenient, and the frictional force of the bolt tightening can stably transmit the torque.

As shown in FIG. 41, there may be a plurality of bolts and a plurality of lugs 112. The plurality of lugs 112 are circumferentially spaced apart, and a plurality of bolts are circumferentially spaced apart. Preferably, the lugs 112 may be along The circumferential direction is evenly spaced apart, and a plurality of bolts and a plurality of lugs 112 are in one-to-one correspondence. Thus, the mounting force of the oil pump assembly 100 in all directions in the circumferential direction is relatively balanced, and the torque transmission is also more stable.

The oil pump assembly 100 and the front end cover 210 can be positioned by a positioning structure (not shown). The positioning structure is used to ensure the coaxiality of the oil pump shaft 130 of the oil pump assembly 100 with the motor shaft 250 of the motor assembly 200.

In some optional embodiments, the positioning structure may be a positioning pin, and the two ends of the positioning pin respectively extend into the front cover 110 of the oil pump assembly 100 and the positioning groove on the front end cover 210.

In other optional embodiments, the positioning structure may be a positioning boss protruding from the front end cover 210. The front cover 110 of the oil pump assembly 100 is provided with a positioning groove, and the positioning boss extends into the positioning boss to realize the oil pump. Positioning of assembly 100.

In still other optional embodiments, the positioning structure may be a positioning boss protruding from the front cover 110 of the oil pump assembly 100. The front end cover 210 of the motor assembly 200 may be provided with a positioning groove, and the positioning boss extends into the positioning. The bosses are positioned to achieve the positioning of the oil pump assembly 100.

It should be noted that the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, and the seventh embodiment can also be combined with the following features to form a new embodiment.

As shown in FIG. 1 to FIG. 38, the total oil inlet port 1010 may be disposed on the front end cover 210. Specifically, the total oil inlet port 1010 may be disposed above the front end cover 210, and the total oil inlet port 1010 may be disposed in the entire electric oil pump. At the highest point of the assembly 1000, the residual gas in the electric oil pump assembly 1000 can be smoothly discharged upward as the oil flows in. In some embodiments in which the electric oil pump assembly 1000 has the liquid cooling chamber 260, the total oil inlet 1010 It can be in communication with the circulating oil passage 262.

As shown in FIGS. 1-38, the electric oil pump assembly 1000 can have an oil pump chamber 1030 in which the oil pump assembly 100 is mounted, and the oil pump chamber 1030 is filled with oil.

The oil pump chamber 1030 can be formed in various manners, and a separate barrel body can be provided. The barrel body defines an oil pump chamber 1030, and the barrel body is fixedly connected with the front end cover 210 of the motor assembly 200, or a part of the peripheral wall of the oil pump chamber 1030 can be combined with the front end. The cover 210 is integrally formed to reduce the assembly process of the electric oil pump assembly 1000.

As shown in FIGS. 1-38, the front end cover 210 may have an annular boss 213 extending axially away from the motor assembly 200. The annular boss 213 may form a side wall of the oil pump chamber 1030, and a side wall of the oil pump chamber 1030. It may be a barrel shape open at both ends, the side wall of the oil pump chamber 1030 surrounds the oil pump assembly 100, and the front end cover 210 itself is connected to one end of the side wall of the oil pump chamber 1030 to form a bottom wall of the oil pump chamber 1030, and the top wall 1031 of the oil pump chamber 1030 The annular boss 213 can be connected by a threaded fastener to close the other end of the oil pump chamber 1030. Thus, the oil pump assembly 100 is easy to install.

As shown in FIG. 1 to FIG. 38, a sealing ring may be interposed between the oil pump assembly 100 and the front end cover 210. The sealing ring may be a rubber ring or the like, and the sealing ring may prevent oil leakage of the oil pump chamber 1030 and the oil pump chamber 1030. Separated from the compartment of the motor assembly 200.

It should be noted that the bottom wall and the top wall described herein are not limited to the up and down direction, but the wall surface of the supporting oil pump assembly 100 is the bottom wall from the assembly angle of the oil pump assembly 100, and the wall surface opposite to the bottom wall is The top wall, in the embodiment shown in Figures 1 - 38, the electric oil pump assembly 1000 is transversely disposed, and the motor assembly 200 and the oil pump assembly 100 are both transversely disposed. The left side wall of the oil pump assembly 100 is the bottom wall and the right side. The wall is the top wall.

The front end cover 210 and the annular boss 213 may be made of aluminum alloy to reduce the total weight of the electric oil pump assembly 1000. The top wall 1031 of the oil pump chamber 1030 may be a steel piece, so that the oil pump chamber can be required to meet the strength requirement. The top wall 1031 of the 1030 is made thinner, making the axial space of the electric oil pump assembly 1000 more compact.

In some alternative embodiments, as shown in FIGS. 14 , 16 , 18 , 27 , and 37 , the oil pump chamber 1030 can communicate with the total oil inlet 1010 , and the oil suction port of the oil pump assembly 100 can be coupled to the oil pump chamber 1030 . Connected, the front end cover 210 is provided with an oil outlet passage 212. One end of the oil discharge passage 212 is connected to the oil discharge port of the oil pump assembly 100, and the other end of the oil discharge passage 212 forms a total oil outlet port 1020.

In the embodiment shown in FIG. 14 and FIG. 16, the annular boss 213 may be provided with an oil pump chamber inlet and an oil pump chamber outlet. The oil enters the oil pump chamber 1030 from the oil pump chamber inlet and flows out from the oil pump chamber outlet to the motor assembly 200. In the liquid cooling chamber 260, the oil pump assembly 100 is sucked through the oil suction port. The oil pump assembly 100 converts the oil from the low pressure to the high pressure and then discharges from the oil discharge port to the total oil outlet 1020 through the oil outlet passage 212.

That is to say, the flow direction of the oil is: total oil inlet 1010 - oil pump chamber 1030 - liquid cooling chamber 260 - oil suction port of oil pump assembly 100 - oil discharge port of oil pump assembly 100 - oil outlet passage 212 - total oil outlet 1020, so that the low-pressure oil can be converted into high-pressure oil, and the circulating fluid can take away the heat of the motor assembly 200 to ensure the stability of the motor assembly 200. The motor assembly 200 does not have to be separately provided with a heat-dissipating unit, and the electric oil pump assembly can be reduced. 1000 volume and weight.

Since the oil filled in the oil pump chamber 1030 is low-pressure oil, the pressure of the oil pump chamber 1030 is small, which is convenient for sealing, and the wall surface of the oil pump chamber 1030 does not have the function of a high-pressure container, and is not limited by the influence of strength, thereby providing a possibility of lightweight design. The wall surface of the oil pump chamber 1030 may be thinner, and the wall surface of the oil pump chamber 1030 may be made of thin-walled metal to reduce the space and weight of the electric oil pump assembly 1000.

It should be noted that, in the embodiment in which the low pressure oil is filled in the oil pump chamber 1030, the housing of the oil pump assembly 100 is fixedly connected to the motor assembly 200, and can be fixedly connected by the bolt connection described in Embodiment 7.

In other alternative embodiments, as shown in FIGS. 1-13, 15, 17, 19-26, 28-36, and 38, the oil pump chamber 1030 and the oil pump assembly 100 are drained. The port is connected, and the oil pump chamber 1030 is in communication with the total oil outlet 1020. The front end cover 210 may be provided with an oil outlet passage 212. One end of the oil outlet passage 212 is connected to the oil pump chamber 1030, and the other end of the oil outlet passage 212 forms a total oil outlet. 1020.

The flow path of the oil is: the total oil inlet 1010 - the oil suction port of the oil pump assembly 100 - the oil discharge port of the oil pump assembly 100 - the oil pump chamber 1030 - the oil outlet passage 212 - the total oil outlet 1020, so that the low pressure oil can be transformed For high pressure oil.

1 , 4 , 5 , 10 , 13 , 19 , 20 , 21 , 24 , 26 , 29 , 31 , 32 , 34 , 36 . In the embodiment, the total oil inlet 1010 and the oil suction port may communicate with each other through the liquid cooling chamber 260 and the motor shaft oil passage 251.

In the embodiments shown in FIGS. 2, 6, 7, 11, 15, 23, 25, 28, 30, 33, 35, 38, the total oil inlet 1010 and the oil absorption The ports can be connected by a liquid cooling chamber 260.

In the embodiment shown in FIGS. 3, 8, 9, 12, and 17, the total oil inlet 1010 and the oil suction port may communicate with each other through the oil inlet passage 215 on the front end cover 210.

On the one hand, the oil pump chamber 1030 can function to eliminate oil pulsation and perform fluid silence. By designing the size of the oil pump chamber 1030, various frequency noise can be eliminated.

On the other hand, the high pressure oil of the oil pump chamber 1030 can apply an axial thrust P to the oil pump assembly 100, and the pressure P applied by the high pressure oil to the rear cover 120 of the oil pump assembly 100 can support the oil pump assembly 100 at the front end of the motor assembly 200. On the cover 210, the oil pump assembly 100 can be subjected to additional axial forces during operation, and the oil pump assembly 100 can remain relatively stable and fixed during operation.

It should be noted that, preferably, when the oil pump assembly 100 is floatingly mounted, the oil pump chamber 1030 is in communication with the oil discharge port of the oil pump assembly 100.

As shown in FIG. 29 to FIG. 38, the electric oil pump assembly 1000 may further include: a soundproof cover 510, the soundproof cover 510 may be disposed outside the outer wall surface of the oil pump chamber 1030, and the soundproof cover 510 is covered in the oil pump chamber 1030. The outer wall is out-of-plane to further isolate the operating noise of the oil pump assembly 100.

The soundproof cover 510 can be made of a soundproof material, and can selectively select a soundproof material of a corresponding spectrum according to the spectral characteristics of the noise to reduce noise. Alternatively, the soundproof cover 510 can be made of a nylon piece or a metal nylon composite material. The metal nylon composite material is a composite material with a metal mesh added to the nylon substrate. The inner surface of the metal nylon composite material is smooth and intermediately porous, which helps to reflect and absorb noise, and the pore size and ratio can be selected according to the spectral characteristics.

As shown in the embodiment of FIGS. 1-18, the electric oil pump assembly 1000 can further include a low pressure cover 520 that can be disposed outside the wall surface of the oil pump chamber 1030 and that defines communication with the total oil inlet 1010. The low pressure chamber 1040, the low pressure cover 520 is connected to the front end cover 210, and the low pressure cover 520 can be coupled to the front end cover 210.

The low pressure chamber 1040 may be filled with low pressure oil to further absorb the working noise of the oil pump assembly 100. The total inlet port 1010 may be directly connected to the low pressure chamber 1040, and the liquid in the liquid cooling chamber 260 or the oil inlet passage 215 may pass through the low pressure. The cavity 1040 is connected to the total oil inlet 1010.

The low-pressure cover 520 can be made of a material having a smooth inner surface and a hole in the middle, so that the low-pressure cover 520 has a strong reflection ability against noise and a good absorption effect. In some specific embodiments, the low pressure cover 520 can be a plastic part or a metal nylon composite material, and the metal nylon composite material is a composite material in which a metal mesh is added to the nylon substrate.

The low pressure cover 520 may have a tapered peripheral wall, and the low pressure cover 520 is laterally mounted, and the inner diameter of the low pressure cover 520 is gradually reduced from the total inlet port 1010 to the direction away from the total inlet port 1010, so that the residual gas in the low pressure chamber 1040 can be The flow along the tapered surface is discharged to the total oil inlet 1010, and the residual gas in the low pressure cover 520 can be completely discharged when the electric oil pump assembly 1000 is operated.

In the embodiment illustrated in Figures 1-38, motor assembly 200 and oil pump assembly 100 are transverse. This can eliminate the influence of the own weight of the oil pump assembly 100 on the assembly pressure between the oil pump assembly 100 and the motor assembly 200, and the height of the electric oil pump assembly 1000 is small to facilitate placement on the vehicle.

As shown in FIGS. 1-38, the oil pump shaft 130 of the oil pump assembly 100 and the motor shaft 250 of the motor assembly 200 can be coupled by a coupling 410 for transmitting torque, that is, the motor shaft 250 can be coupled. The shaft 410 drives the oil pump shaft 130 to rotate. The coupling 410 has various structural forms, a slider coupling, a hinge coupling, a gear coupling and the like.

In a preferred embodiment, as shown in FIG. 42, the coupling 410 has a coupling hole 411, the motor shaft 250 has a first key, and the oil pump shaft 130 has a second key. The first key cooperates with the coupling hole 411, and the second The key is engaged with the coupling hole 411, and the first key and the second key have a coincident section in the axial direction.

That is, the coupling hole 411 may include two portions that are offset from each other to cooperate with the motor shaft 250 and the oil pump shaft 130 respectively. The length of the motor shaft 250, the coupling 410, and the oil pump shaft 130 is smaller than the motor shaft 250 and The sum of the lengths of the oil pump shafts 130 such that the axial length of the coupling 410 is short, and the axial length of the coupling 410 can be shortened by half, so that the axial space of the electric oil pump assembly 1000 is more compact.

Specifically, the coupling hole 411 may be a "ten" shaped hole penetrating through the coupling 410, and the coupling 410 may be cylindrical, and the coupling hole 411 may be axially opened in the middle of the coupling 410. The first key and the second key may both be in a "one" shape, where the "one" shape includes a continuous strip shape, and also includes a discontinuous strip shape, and the middle portion of at least one of the first key and the second key has Avoid the slot.

In this way, the first key and the second key can achieve axial overlap without interference, and torque is transmitted from the side of the first key of the motor shaft 250 to the coupling 410, which in turn transmits torque to the oil pump shaft 130. The side of the two keys. Since the torsional shear force of the motor shaft 250 or the oil pump shaft 130 when transmitting torque is reduced from the shaft surface to the center gradient and is zero at the center, the influence of the groove on the center of the key is small in the middle of the key.

When the key is selected to open the escape groove, it can be selected according to the diameter of the shaft. If the diameter of the oil pump shaft 130 is smaller than the diameter of the motor shaft 250, the middle of the first key has a relief groove; if the diameter of the oil pump shaft 130 is larger than the motor shaft The diameter of 250 has a relief groove in the middle of the second button. In this way, the influence of the opening of the escape groove on the strength of the shaft can be further reduced. Of course, in a specific embodiment, as shown in FIG. 42, the middle of the first key and the second key may be respectively provided with a relief groove to prevent the motor shaft 250 or the oil pump shaft 130 from directly contacting.

In the description of the specification, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples, including but not limited to various mountings of the oil pump assembly 100 (including The elastic member 311 is floatingly mounted, floatingly mounted by the buckle 331 , floatingly mounted by the magnetic member 321 , fixedly mounted by the screw connection 341 , and various cooling methods or oil delivery modes of the motor assembly 200 (including passing through the motor shaft oil passage 251 ) The oil delivery, oil delivery through the liquid cooling chamber 260, isolation cooling can be combined with one another to obtain a new embodiment.

The embodiment shown in Fig. 1, Fig. 19, Fig. 29 can be obtained by combining the features of the first embodiment and the fourth embodiment.

The embodiment shown in Fig. 4, Fig. 5, Fig. 21, Fig. 22, Fig. 31, Fig. 32 can be obtained by combining the features of the first embodiment and the fifth embodiment.

The embodiment shown in Figs. 10, 24, and 34 can be obtained by combining the features of the first embodiment and the sixth embodiment.

The embodiment shown in Fig. 13, Fig. 14, Fig. 26, Fig. 27, Fig. 36, Fig. 37 can be obtained by combining the features of the first embodiment and the seventh embodiment.

The embodiment shown in Figs. 2, 20, and 30 can be obtained by combining the features of the second embodiment and the fourth embodiment.

The embodiment shown in Fig. 6, Fig. 7, Fig. 23, Fig. 33 can be obtained by combining the features of the second embodiment and the fifth embodiment.

The embodiment shown in Figs. 11, 25, and 35 can be obtained by combining the features of the second embodiment and the sixth embodiment.

The embodiment shown in Figs. 15, 16, 28, and 38 can be obtained by combining the features of the second embodiment and the seventh embodiment.

The combination of the third embodiment and the features of the fourth embodiment can provide an embodiment as shown in FIG.

The embodiment shown in Figs. 8 and 9 can be obtained by combining the features of the third embodiment and the fifth embodiment.

The combination of the third embodiment and the features of the sixth embodiment can provide an embodiment as shown in FIG.

The embodiment shown in Figs. 17 and 18 can be obtained by combining the features of the third embodiment and the seventh embodiment.

The present disclosure also discloses a steering system 1. As shown in FIG. 43, the steering system 1 of the embodiment of the present disclosure has the electric oil pump assembly 1000 described in any of the above embodiments, and the oil output from the electric oil pump assembly 1000 can be Steering is achieved by driving the transverse rod displacement of the piston push rod of the steering power cylinder. Thus, the steering system 1 of the embodiment of the present disclosure has a compact structure, good steering maneuverability, and good work stability.

The present disclosure also discloses a lubrication system 2, as shown in FIG. 44, the lubrication system 2 of the embodiment of the present disclosure has the electric oil pump assembly 1000 described in any of the above embodiments, and the electric oil pump assembly 1000 can apply lubricating oil The pumping is carried out in a system requiring lubrication, so that the lubrication system 2 of the embodiment of the present disclosure has a compact structure and good work stability.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the present disclosure. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the disclosure is defined by the claims and their equivalents.

Claims

An electric oil pump assembly characterized by comprising:

Motor assembly

An oil pump assembly floatingly mounted at an end of the motor assembly and coupled to a motor shaft of the motor assembly;

An elastic member elastically coupled between the motor assembly and the oil pump assembly to apply an axial preload force toward the oil pump assembly toward the motor assembly.
The electric oil pump assembly according to claim 1, further comprising: a positioning member, the oil pump assembly is floatingly supported on a front end cover of the motor assembly, and the positioning member is coupled to the oil pump assembly and the A radial clearance fit between the front end caps and at least one of the oil pump assembly and the front end cap.
The electric oil pump assembly according to claim 2, wherein the positioning member is a bolt, the outer circumference of the oil pump assembly is provided with a lug, and the lug is provided with a positioning hole, and the bolt penetrates the The positioning hole is screwed to the front end cover, and the bolt is in clearance with the positioning hole.
The electric oil pump assembly according to claim 3, wherein the elastic member is a spring and is sleeved outside the bolt, and the spring elastically abuts against the lug and the head of the bolt between.
An electric oil pump assembly according to claim 3 or claim 4 wherein at least a portion of the rim of the front cover of the oil pump assembly extends radially outwardly to form the lug.
The electric oil pump assembly according to any one of claims 3 to 5, wherein the lug is axially spaced apart from the front end cover, and the elastic member is elastically stretchably coupled to the convex portion. Between the ear and the front end cover.
The electric oil pump assembly according to any one of claims 2 to 6, wherein the positioning member and the elastic member are plural, and the plurality of positioning members are arranged in a circumferential direction, and more The positioning member and the plurality of elastic members are in one-to-one correspondence.
The electric oil pump assembly according to any one of claims 1 to 7, characterized by comprising: an oil pump chamber, the oil pump assembly is floatingly supported on a front end cover of the motor assembly, and the oil pump assembly is installed at the In the oil pump chamber, the oil pump chamber is connected to an oil discharge port of the oil pump assembly and communicates with a total oil outlet of the electric oil pump assembly.
The electric oil pump assembly according to claim 8, wherein the front end cover is provided with an oil discharge passage, one end of the oil discharge passage is connected to the oil pump chamber, and the other end forms the total oil outlet.
The electric oil pump assembly according to claim 8 or 9, wherein said front end cover has an annular boss extending in a direction away from said motor assembly in the axial direction, said annular boss forming said oil pump chamber The sidewall of the oil pump chamber is connected to the annular boss by a threaded fastener.
The electric oil pump assembly according to any one of claims 8 to 10, further comprising: a soundproof cover, the soundproof cover being disposed outside an outer wall surface of the oil pump chamber.
The electric oil pump assembly according to any one of claims 8 to 11, further comprising: a low pressure cover, the low pressure cover being disposed outside a wall surface of the oil pump chamber and defining the electric oil pump The low pressure chamber of the total inlet port of the assembly is connected to the front end cover.
The electric oil pump assembly according to claim 12, wherein said low pressure cover has a tapered peripheral wall, and said inner diameter of said low pressure cover is from said total oil inlet to a direction away from said total oil inlet Gradually become smaller.
The electric oil pump assembly according to any one of claims 8 to 13, characterized in that a seal ring is interposed between the oil pump assembly and the front end cover.
An electric oil pump assembly according to any one of claims 1 to 14, wherein the motor assembly and the oil pump assembly are transverse.
The electric oil pump assembly according to any one of claims 1 to 15, wherein the motor assembly comprises: a motor case, a rear end cover, a front end cover, a stator and a rotor, and the oil pump assembly is floatingly supported The front end cover closes a rear end of the motor casing to form a liquid cooling cavity, and the liquid cooling cavity includes a circulating oil passage extending in the axial direction and a communication with the circulating oil passage a cavity, the circulating oil passage being located between the stator and the motor casing, the rear cavity being located between the rear end cover and the stator, the motor shaft and the rotor.
The electric oil pump assembly according to claim 16, wherein said plurality of circulating oil passages are plural, and a plurality of said circulating oil passages are spaced apart in a circumferential direction of said stator.
The electric oil pump assembly according to claim 16 or 17, wherein a total oil inlet of the electric oil pump assembly is in communication with the liquid cooling chamber, and the liquid cooling chamber and the oil suction port of the oil pump assembly Connected.
The electric oil pump assembly according to claim 18, wherein a motor shaft oil passage provided in a motor shaft of the motor assembly, the motor shaft oil passage is connected to the rear chamber, and the oil pump assembly The oil suction port is in communication with the motor shaft oil passage.
The electric oil pump assembly according to claim 19, wherein said motor shaft oil passage extends in the axial direction and is open at an end remote from said oil pump assembly, and communicates with said rear chamber at said one end, The other end is provided with an oil supply hole extending in the radial direction, and the oil supply hole is in communication with the oil suction port.
The electric oil pump assembly according to claim 20, wherein the plurality of oil supply holes are plural, and the plurality of oil supply holes are evenly spaced apart in the circumferential direction.
An electric oil pump assembly according to claim 20 or claim 21, wherein said front end cover has a support flange projecting axially toward a rotor of said motor assembly, said support flange for supporting said The bearing of the motor assembly, the support flange, the motor shaft, and the bearing of the motor assembly collectively define an oil suction chamber connected to the oil suction port, the oil supply hole being connected to the oil suction chamber.
The electric oil pump assembly according to any one of claims 19 to 22, wherein the rear end cover has a support base for supporting the motor shaft, and the support base is provided with an oil passage passage Connecting the rear cavity to the motor shaft oil passage.
The electric oil pump assembly according to any one of claims 18 to 24, wherein the front end cover is provided with a fuel passage that communicates the circulation oil passage with the oil suction port.
The electric oil pump assembly according to claim 24, wherein said front end cover has a support flange projecting axially toward a rotor of said motor assembly, said support flange for supporting said motor assembly Bearings, the support flange, the motor shaft, and the bearings of the motor assembly collectively define an oil suction chamber connected to the oil suction port, the oil passage passages through the support flange to communicate the oil suction chamber With the circulating oil passage.
The electric oil pump assembly according to claim 24 or 25, wherein the number of the circulating oil passages is plural, and the plurality of the circulating oil passages are spaced apart in the circumferential direction of the stator, and the plurality of At least one of the oil of the circulation oil passage flows from the rear to the front and is connected to the oil passage.
An electric oil pump assembly according to any one of claims 18 to 26, wherein said total oil inlet port is provided on said front end cover and connected to said circulating oil passage, said stator and said An oil retaining ring is arranged between the front end covers.
The electric oil pump assembly according to claim 27, wherein said total oil inlet port is provided above said front end cover.
The electric oil pump assembly according to any one of claims 16 to 28, wherein the liquid cooling chamber is provided in isolation from an oil suction port of the oil pump assembly.
A steering system characterized by having an electric oil pump assembly according to any one of claims 1-29.
A lubrication system characterized by having an electric oil pump assembly according to any one of claims 1-29.