CN107869435B - Motor pump assembly, steering system and vehicle - Google Patents

Abstract

The invention discloses a kind of motor pump assembly, steering system and vehicle, the motor pump assembly includes: electric machine assembly；Oil pump component；Internal sound insulation cover, the internal sound insulation cover are located at outside the oil pump component, and limit the internal layer sound insulation chamber filled with low pressure oil with the oil pump component, and the internal layer sound insulation chamber is connected to the low pressure chamber of the oil pump component, and the internal sound insulation cover is equipped with sound insulation cover chamber；Flow valve, the flow valve includes spool and elastic component, the sound insulation cover chamber and the end cap chamber limit go out to be used to accommodate the valve chamber of the spool, and the elastic component elasticity is only against between the spool and the roof of the sound insulation cover chamber, and the outlet of the flow valve is located on the peripheral wall of the end cap chamber；Safety valve, the safety valve are arranged to the pressure release when the pressure of the high pressure chest is greater than scheduled pressure value.Motor pump assembly of the invention, lightweight is horizontal high, and operating noise is small, and the pulsation fluctuation of motor pump assembly is small, and output is stablized, and work efficiency is high.

Description

Motor pump assembly, steering system and vehicle

Technical field

The invention belongs to technical field of vehicle manufacture, in particular to a kind of motor pump assembly, have the dynamo oil The steering system of pump assembly and vehicle with the steering system.

Background technique

Motor pump assembly is widely used in the steering system of vehicle, and in the related technology, oil pump component is immersed in high pressure oil In, the outside of oil pump component is high pressure chest, this to need to design high-intensitive shell the casting to shell to seal the high pressure chest The sealing performance requirement for making technique and high pressure chest is very high, and the thickness of shell is larger, does not meet light-weighted requirement.Further Ground, the vibrating noise that oil pump component generates during the work time is larger, in the related technology often through the various damping elements of setting Carry out insulating noise, the construction of damping element is complicated, occupies biggish installation space, and high production cost, and assembly technology is complicated, deposits In room for improvement.

Summary of the invention

The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention One purpose is to propose that a kind of operating noise is low, the horizontal high motor pump assembly of lightweight.

It is another object of the present invention to propose a kind of steering system with above-mentioned motor pump assembly.

It is another object of the present invention to propose a kind of vehicle with above-mentioned steering system.

The motor pump assembly of embodiment according to a first aspect of the present invention, comprising: electric machine assembly；Oil pump component, the oil Pump assembly is supported on the end cap of the electric machine assembly, the upper end cover of the oil pump component have through the upper end cover and with institute State the end cap chamber of the high pressure chest connection of oil pump component；Internal sound insulation cover, the internal sound insulation cover are located at outside the oil pump component, and with The oil pump component limits the internal layer sound insulation chamber filled with low pressure oil, the low pressure of the internal layer sound insulation chamber and the oil pump component Chamber connection, the internal sound insulation cover are equipped with sound insulation cover chamber；Flow valve, the flow valve include spool and elastic component, the sound insulation Cover chamber and the end cap chamber limit go out to be used to accommodate the valve chamber of the spool, and the elastic component elasticity is only against the spool and institute Between the roof for stating sound insulation cover chamber, the outlet of the flow valve is located on the peripheral wall of the end cap chamber；Safety valve, the safety valve It is arranged to the pressure release when the pressure of the high pressure chest is greater than scheduled pressure value.

The motor pump assembly of embodiment according to a first aspect of the present invention, by being filled out between interior blimp and oil pump component Low pressure oil to be filled, the lightweight of motor pump assembly is helped to realize, motor pump assembly the space occupied is small, and manufacturing cost is low, Operating noise is small.

The dynamo oil any just like first aspect is arranged in the steering system of embodiment according to a second aspect of the present invention Pump assembly.

Possessed advantage is identical compared with the existing technology with above-mentioned motor pump assembly for the steering system, herein not It repeats again.

The steering system any just like second aspect is arranged in the vehicle of embodiment according to a third aspect of the present invention.

Possessed advantage is identical compared with the existing technology with above-mentioned steering system for the vehicle, and details are not described herein.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 is the structural schematic diagram of the motor pump assembly of the first embodiment according to the present invention；

Fig. 2 is the partial enlarged view in Fig. 1 at A；

Fig. 3 is the structural schematic diagram of the motor pump assembly of second of embodiment according to the present invention；

Fig. 4 is the partial enlarged view in Fig. 3 at B；

Fig. 5 is that schematic diagram is eliminated in the output ripple of motor pump assembly according to an embodiment of the present invention；

Fig. 6 is the structural schematic diagram of steering system according to an embodiment of the present invention；

Fig. 7 is the structural schematic diagram of vehicle according to an embodiment of the present invention.

Appended drawing reference:

Motor pump assembly 1000, oil discharge passage 1010, fuel-displaced branch 1020, buffering oil duct 1021, damping hole 1022,

Oil pump component 100, low pressure chamber 101, high pressure chest 102, upper end cover 110, end cap chamber 111, lower cover 120, lower channel 121, input shaft 130,

Electric machine assembly 200, motor cavity 201, end cap 210, motor shaft 220, shaft coupling 230, rotor 240, stator 250, electricity Control box 260, motor triple line 261, automatically controlled control and DC communication reformer plate 262, automatically controlled heat dissipation oil reservoir 263, motor low pressure profit Sliding heat dissipation oil reservoir 264,

Flow valve 300, outlet 301, elastic component 320, spool 330, sleeve 331, valve port 331a, 331b, pedestal 332, limit Position hole 332a, lug boss 333, safe valve core 340, seal section 341, guide section 342 limit section 343, the elastic component of safety valve 350,

Internal sound insulation cover 400, internal layer sound insulation chamber 401, sound insulation cover chamber 402, internal sound insulation cover through-hole 402a, top cover 410, side wall 420,

Outer blimp 500, outer layer sound insulation chamber 501, partition 502.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.

In the present invention, term " first ", " second " are used for description purposes only, and are not understood to indicate or imply opposite Importance or the quantity for implicitly indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be bright Show or implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two It is a, three etc., unless otherwise specifically defined.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Motor pump assembly 1000 according to an embodiment of the present invention is described in detail with reference first to attached drawing.

In one embodiment of the invention, as Figure 1-Figure 2, motor pump assembly 1000 includes electric machine assembly 200, oil pump component 100, internal sound insulation cover 400, flow valve 300 and safety valve.

Wherein, electric machine assembly 200 is used to provide the driving force of the operating of oil pump component 100, such as the motor of electric machine assembly 200 Axis 220 can be connected by shaft coupling 230 with the input shaft 130 of oil pump component 100, and certainly, electric machine assembly 200 is not limited to directly Oil pump component 100 is driven, can also be connect by transmission mechanisms such as gearbox or retarders with oil pump component 100.

Oil pump component 100 works under the driving of electric machine assembly 200, and low pressure oil is changed into high pressure oil output, oil pump Component 100 can be multiple structural forms, for example oil pump component 100 can be external gear rotary pump, cycloid gear pump, vane pump Or plunger pump etc., oil pump component 100 can be supported on the end cap 210 (drive end bearing bracket) of electric machine assembly 200, such as oil pump component 100 lower cover 120 can be supported on the end cap 210 of electric machine assembly 200.

Internal sound insulation cover 400 is located at outside oil pump component 100, and internal sound insulation cover 400 and oil pump component 100 limit internal layer sound insulation Chamber 401, internal layer sound insulation chamber 401 is interior to be filled with low pressure oil, it is preferable that internal layer sound insulation chamber 401 can be with the low pressure of oil pump component 100 Chamber 101 (hydraulic oil input cavity) connection.

That is, the periphery of oil pump component 100 is wrapped up by low pressure oil, the pressure of internal layer sound insulation chamber 401 is small, convenient for close The effect of high-pressure bottle is not present in envelope, internal sound insulation cover 400, it is not necessary to be limited to the influence of intensity, provide light-weight design can Can property, the material of internal sound insulation cover 400 is thick to be can be set relatively thin, for example internal sound insulation cover 400 can be made of thin-wall metal, with reduction The occupied space and weight of motor pump assembly 1000.Meanwhile the vibrating noise of oil pump component 100 can be by internal layer sound insulation chamber Low pressure oil in 401 is absorbed and is reflected by internal sound insulation cover 400, to reduce the operating noise of motor pump assembly 1000.

With reference to Fig. 2, end cap chamber 111 can be equipped on the upper end cover 110 of oil pump component 100, end cap chamber 111 can run through upper End cap 110, and end cap chamber 111 can be connected to the upper end of high pressure chest 102；Can be equipped with reference to Fig. 2, on internal sound insulation cover 400 every Sound cover chamber 402, sound insulation cover chamber 402 can be located on the top cover 410 of internal sound insulation cover 400, and sound insulation cover chamber 402 can be towards end cap chamber 111 open wide.

Flow valve 300 includes spool 330 and elastic component 320, and end cap chamber 111 and sound insulation cover chamber 402 can limit jointly The valve chamber of flow valve 300, the valve chamber are used to accommodate the spool 330 of flow valve 300, and the outlet 301 of flow valve 300 can be located at end On the peripheral wall of lid chamber 111, the connectivity part of end cap chamber 111 and high pressure chest 102 is the import of flow valve 300,320 elasticity of elastic component It being only against between the roof of sound insulation cover chamber 402 and spool 330, elastic component 320 is used to provide the pretightning force for compressing upper end cover 110, Elastic component 320 can be spring.

End cap chamber 111 is connected to the high pressure chest 102 of oil pump component 100, and spool 330 is in oil pressure and the common work of elastic force Upper end cover 110, the oil pressure collective effect of the elastic force of elastic component 320 and the high pressure oil drawn from fuel-displaced branch 1020 are only supported with lower In upper end cover 110, keep the upper end cover 110, oil pump body (such as bearing, gear etc.) and lower cover 120 of oil pump component 100 mutual It compresses, to keep the leakproofness of oil pump component 100, and in assembly without carrying out bolt large torque lock on oil pump component 100 Tightly, the pretightning force that flow valve 300 provides need to only guarantee that oil pump component 100 is installed, and can reduce oil pump component 100 in this way Operating friction power, promote the work efficiency of oil pump component 100, the mechanical efficiency of oil pump component 100 is higher.

Meanwhile oil pump component 100 and the direct contact area of other component (various shells) are smaller, with reference to Fig. 1, oil pump group Part 100 only the package region outside shaft coupling 230 and high-pressure oil passage to the interface area of diverter and the end of electric machine assembly 200 There is contact in lid 210, and be additionally provided with sealing ring at the oil inlet and outlet of oil pump component 100, and sealing ring is under the action of pretightning force Deformation makes to form gap oil film between the lower cover 120 of oil pump component 100 and the end cap 210 of electric machine assembly 200, due to contact Area is small, and two infra-low frequencies of the oscillation generation that the gap oil film and sealing ring can eliminate oil pump component 100 and end cap 210 are made an uproar Sound, and the high frequency noise that the work of oil pump component 100 generates can also be reflected or be absorbed by sealing ring and gap oil film.

With reference to Fig. 1, the oil discharge passage 1010 of oil pump component 100 can be located on the end cap 210 of electric machine assembly 200, fuel-displaced Channel 1010 is connected to the lower end of high pressure chest 102, for example oil discharge passage 1010 can pass through lower channel 121 and high pressure chest 102 Lower end is connected, and lower channel 121 runs through lower cover 120.

It is understood that the output ripple high pressure oil of oil pump component 100 is transmitted to spool 330 all the way, another way is by going out Oily channel 1010 is transmitted to diverter.When the pulsation of high pressure oil is transmitted to spool 330, spool 330 can reflect the pulsation, reference Fig. 5 is the pulsation before reflection above (a) figure, is the pulsation after reflection below (a) figure, and (b) figure be showing after two-way pulsation synthesizes It is intended to, the pulsation of reflection forms oil liquid pulsation with the pulsation for being directly transmitted to oil discharge passage 1010 and misplaces, the oil liquid arteries and veins of two bursts of dislocation It is dynamic to cancel out each other, so as to cut down the output ripple for even being eliminated motor pump assembly 1000, to realize motor pump assembly 1000 active noise reduction.

Optionally, for end cap chamber 111 it is so structured that stepped hole is to form cascaded surface, the lower end of spool 330 can only support rank Tread, the cascaded surface of end cap chamber 111 oil pressure downward by high pressure oil and spool 330 are applied to the pressure of cascaded surface to make Upper end cover 110, oil pump body (such as bearing, gear etc.) and the lower cover 120 of oil pump component 100 are compacted.

It can have lug boss 333 on the end face towards cascaded surface of spool 330, specifically, lug boss 333 can be located at The outer surface of the bottom wall of sleeve 331, lug boss 333 only support cascaded surface, can reduce the contact surface of spool 330 Yu cascaded surface in this way Product reduces the secondary noise between spool 330 and upper end cover 110, and spool 330 will not be formed due to long-time service with cascaded surface Natural cold welding, lug boss 333 can be to be multiple, and multiple lug bosses 333 are evenly distributed on the separate internal sound insulation cover 400 of spool 330 End face on so that the uniform force of spool 330, for example multiple lug bosses 333 can be located on the same annulus, lug boss 333 can have trapezoid cross section.

Spool 330 can be pulsed by flexible elimination a part of elastic component 320, for example oil pressure increases suddenly, spool 330 It can move upwards under the action of oil pressure with compression elastic piece 320.The valve core seal ring and spool 330 compressed by spool 330 Gap oil film between the peripheral wall of end cap chamber 111 can also eliminate a part of pulsation, to cut down the output of oil pump component 100 Pulsation, so that the oil liquid pressure more even of output.

The pressure release when the pressure of high pressure chest 102 is greater than scheduled pressure value can be set into safety valve, to play anti-locking system Damage parts problem caused by pressure is excessive.

Specifically, spool 330 may be constructed the valve seat of safety valve, and spool 330 includes sleeve 331 and pedestal 332, sleeve 331 can be set in at least partly outer of pedestal 332, on spool 330 tool there are two valve port, two valve ports respectively with high pressure chest 102 are connected to internal layer sound insulation chamber 401, for the convenience of description, being numbered the two valve ports respectively as 311a and 311b, valve port 311a It can be respectively provided at valve port 311b on the peripheral wall and bottom wall of sleeve 331, for example valve port 311a can be located at the bottom wall of sleeve 331 On, valve port 311b can be located on the peripheral wall of sleeve 331, and valve port 311a is connected with high pressure chest 102, valve port 311b and internal layer sound insulation Chamber 401 is connected, and 350 elasticity of elastic component of safety valve is folded between safety valve spool 340 and pedestal 332, so that safety valve valve Core 340 blocks valve port 311a.

Specifically, with reference to Fig. 2, safe valve core 340 may include the seal section 341 being sequentially connected, guide section 342 and limit Position section 343.Wherein, for seal section 341 for sealing valve port 311a, seal section 341 can have conical seal (contact) face, the bullet of safety valve Property part 350 can be set in outside limit section 343, and the elastic component 350 of safety valve only can be against pedestal 332 and guide section 342 End face between, the elastic component 350 of safety valve can be spring, can be equipped with limit hole 332a on pedestal 332, position hole 332a can To be connected to internal sound insulation cover 400, limit section 343 and limit hole 332a cooperate, and the internal perisporium of guide section 342 and sleeve 331 cooperates, Limit section 343 and guide section 342 play the role of limit jointly.By the way that flow valve 300 and safety valve is integrally disposed, can contract The size of small machine oil pump assy 1000.

Motor pump assembly 1000 according to an embodiment of the present invention, by between interior blimp 400 and oil pump component 100 Low pressure oil is filled, the lightweight for helping to be promoted motor pump assembly 1000 is horizontal, and the work of motor pump assembly 1000 is made an uproar Sound is small, and can reduce the system risk of motor pump assembly 1000 by the way that safety valve is arranged, and motor pump assembly 1000 makes It is higher with service life and safety in utilization.

With reference to Fig. 1, internal sound insulation cover 400 may include top cover 410 and side wall 420, and top cover 410 can be connected with side wall 420, Side wall 420 can be connected with the end cap 210 of electric machine assembly 200, and top cover 410 can be plate (including plate and bending plate), side Enclosing 420 can substantially in a ring.

In some alternative embodiments, with reference to Fig. 1, top cover 410 can be connected by threaded fastener with side wall 420, The junction of top cover 410 and side wall 420 can be equipped with sealing ring, and side wall 420 can be formed with the end cap 210 of electric machine assembly 200 It is integrated, the molding of internal sound insulation cover 400 is simple as a result, and sealing station is few.

In other optional embodiments, top cover 410 can be formed as one with side wall 420, and side wall 420 can be with electricity The end cap 210 of thermomechanical components 200 is connected by threaded fastener, in this way, the molding of internal sound insulation cover 400 is simple, and sealing station is few.

There are many structure types of internal sound insulation cover 400, only enumerates two kinds of more preferred knots of internal sound insulation cover 400 above Structure, can be according to suitable structure types of factor designs such as the oil circuit of oil pump component 100 trends in actual application process Internal sound insulation cover 400.

With reference to Fig. 1, motor pump assembly 1000 can also include outer blimp 500, and outer blimp 500 can be located at interior Blimp 400 it is at least partly outer, and outer layer sound insulation chamber 501 is limited between outer blimp 500 and internal sound insulation cover 400.

Outer blimp 500 can smooth by inner surface, intermediate porose material be made, in this way, outer blimp 500 is to noise Albedo is strong, good absorption effect.In some specific embodiments, outer blimp 500 can be plastic part or metal Buddhist nun Imperial composite material is made, and metal-nylon composite material can be the composite material of addition metal mesh in nylon base.

Multiple material can be filled in outer layer sound insulation chamber 501, in some preferred embodiments, with reference to Fig. 1 and Fig. 3, Outer layer sound insulation chamber 501 is for filling low pressure oil.Preferably, internal layer sound insulation chamber 401 can be connected to outer layer sound insulation chamber 501, one In a specific embodiment, low pressure oil can be in the low pressure of outer layer sound insulation chamber 501, internal layer sound insulation chamber 401 and oil pump component 100 It circulates between chamber 101.

Further, with reference to Fig. 1, internal sound insulation cover through-hole 402a, internal sound insulation cover can be equipped on the roof of sound insulation cover chamber 402 Through-hole 402a is connected to sound insulation cover chamber 402 and outer layer sound insulation chamber 501, the oil in this way when spool 330 moves, in sound insulation cover chamber 402 Liquid can be discharged with outer layers sound insulation chamber 501.

It should be noted that the connection of internal layer sound insulation chamber 401 and outer layer sound insulation chamber 501 includes directly being connected to and in succession It is logical, for example partition 502 can be equipped between outer layer sound insulation chamber 501 and internal layer sound insulation chamber 401, partition 502 for prevent outer layer every Low pressure oil in sound chamber 501 flows directly into internal layer sound insulation chamber 401, can lead between outer layer sound insulation chamber 501 and internal layer sound insulation chamber 401 Cross 201 indirect communication of motor cavity.

In other optional embodiments, outer blimp 500 is located at outside internal sound insulation cover 400, and outer blimp 500 with Sound absorbing layer can be filled between internal sound insulation cover 400, sound absorbing layer can be made of porous material, for example sound absorbing layer can be sound-absorbing Relevant acoustical cotton parameter can be set according to the frequency of noise in cotton, preferably to sop up exceeded noise.

It is understood that low pressure oil and internal sound insulation of the operating noise of oil pump component 100 in internal layer sound insulation chamber 401 Under the absorption and reflection of cover 400, small part noise can pass through internal sound insulation cover 400, and the material in the chamber of outer layer sound insulation at this time 501 is such as Acoustical cotton or low pressure oil can further absorb the noise, and outer blimp 500 can also play absorption and reflection to noise Effect, in this way, the operating noise of motor pump assembly 1000 available is greatly cut down by multi-absorption and reflection.

Optionally, it could be covered with outer sound absorbing layer outside outer blimp 500, further to completely cut off oil pump component 100 Operating noise, outer sound absorbing layer can be made of porous material, for example outer sound absorbing layer can be nylon part, the inner surface light of nylon part Sliding, intermediate porous helps to reflect and absorb noise.

Energy-absorbing portion can be equipped on the oil discharge passage 1010 of oil pump component 100, energy-absorbing portion can be various structures, for example inhale Energy portion can be energy-storing chamber or air accumulator or damping hole 1022.

In a specific embodiment, energy-absorbing portion can be energy-storing chamber, and energy-storing chamber can be located on oil discharge passage 1010, The sectional area of energy-storing chamber can be greater than the sectional area of the other parts of oil discharge passage 1010, and energy-storing chamber, which can play, eliminates oil liquid arteries and veins Effect that is dynamic and carrying out fluid noise reduction.

Specifically, energy-storing chamber can be located at the bending place of oil discharge passage 1010, and energy-storing chamber can be cylinder, energy-storing chamber The lower end of peripheral wall can be connected to the lower end of the high pressure chest 102 of oil pump component 100, and the middle upper end of the peripheral wall of energy-storing chamber can be always It is communicated to the oil outlet of motor pump assembly 1000.In this way, buffering effect of the shoe cream room to pulsation and the eradicating efficacy to noise More preferably.

In another specific embodiment, energy-storing chamber can be located at the high pressure between sound insulation cover chamber 402 and high pressure chest 102 On oil circuit, that is to say, that energy-storing chamber can be located on fuel-displaced branch 1020, and the cross-sectional area of energy-storing chamber can be greater than fuel-displaced branch The cross-sectional area of 1020 other parts.

Specifically, energy-storing chamber can have circular cross section, and energy-storing chamber can be located in the side wall 420 of blimp, energy storage Chamber can extend to top cover 410 from one end of the separate top cover 410 of side wall 420, and the volume of such energy-storing chamber is bigger, energy storage Chamber can play the role of eliminating oil liquid pulsation and carry out fluid noise reduction, and the size by designing energy-storing chamber may be implemented to various The elimination of frequency noise.

In some preferred embodiments of the invention, with reference to Fig. 1, electric machine assembly 200 can be liquid-cooled, and motor group The motor cavity 201 of part 200 is connected to the low pressure chamber 101 of oil pump component 100, can by the oil suction suction function of oil pump component 100 To drive oil liquid to flow through motor cavity 201, to realize in the course of work of motor pump assembly 1000 to electric machine assembly 200 Liquid-cooling heat radiation.

In the embodiment that outer layer sound insulation chamber 501 is filled with low pressure oil and is connected to internal layer sound insulation chamber 401, motor pump is total It can be directly connected to outer layer sound insulation chamber 501 at 1000 oil inlet, in order to guide the flow direction of oil liquid, in some optional implementations In example, with reference to Fig. 1 and Fig. 3, partition 502 can be equipped between outer layer sound insulation chamber 501 and internal layer sound insulation chamber 401, such oil liquid Flow direction are as follows: outer layer sound insulation chamber 501- motor cavity 201- low pressure chamber 101- high pressure chest 102- oil discharge passage 1010- is turned to.

Certainly, the oil inlet of motor pump assembly 1000 can also be located at other positions, such as motor pump assembly 1000 Oil inlet can be located at 260 bottom of electric-controlled box of electric machine assembly 200.

It is understood that the fever of the electric control part of electric machine assembly 200 is more serious, oil liquid can pass through electric-controlled box 260 The oil inlet of bottom enters motor cavity 201, and oil liquid cools down the electric control part of electric machine assembly 200 in advance, passes through oil pump component 100 Oil suction suction function, oil liquid flows to automatically controlled heat dissipation oil reservoir 263, turns to motor triple line 261 and automatically controlled control and DC communication Change plate 262 to be cooled down, and cooling oil duct can have been designed around stator 250, the oil liquid in cooling oil path can cool down stator 250, oil liquid reaches the inlet port of oil pump component 100 using cooling oil path.

Preferably, the rotor 240 of electric machine assembly 200 can be immersed in low pressure oil, and such oil liquid can play sluggish turn The effect of 240 rotation of son, to buffer the anxious acceleration or the anxious problem slowed down and inertia modulus is excessive of rotor 240, to prevent electricity Thermomechanical components 200 throw impact when carrying to oil circuit is turned to, and more preferably, steering wheel is not easy to shake the feel of steering, and rotor 240 can be right Upper and lower automatically controlled heat dissipation oil reservoir 263 and motor low pressure Pulvis Emolliens hot oil layer 264 forms annular agitation, reinforces electric control part and stator 250 cooling effect.

Further, electric machine assembly 200 throws the impact carried to oil circuit is turned in order to prevent, influences the feel turned to, can be with Increase energy storing structure in oil circuit, can also be controlled by revolving speed of the automatically controlled aspect to electric machine assembly 200, such as in high speed A constant acceleration algorithm is carried out to reduce revolving speed, to drop rapidly in revolving speed to the revolving speed of electric machine assembly 200 in the case of reduction In low process, the load of electric machine assembly 200 and oil pump component 100 is made to have the process slowly reduced.

The motor pump assembly of the embodiment of the present invention can be used for steering system, and the revolving speed n of motor shaft 220 is according at least to vehicle The corner w of fast v and steering wheel control, the revolving speed n of motor shaft 220 can determine the oil pressure and flow that oil pump component 100 exports, from And it can control the corner of wheel.The electronic control unit of electric machine assembly 200 can be connected with the control unit of steering system, steering system The control unit of system can receive the speed signal of vehicle and the angular signal of steering wheel, and the control unit root of steering system Corresponding control instruction is issued to control the revolving speed n of motor shaft 220 to the electronic control unit of electric machine assembly 200 according to these signals.

Motor pump assembly 1000 is arranged in v=0km/h, and when w≤w1, and the revolving speed n of control motor shaft 220 meets: n3≤n≤n4.Preferably, 5 ° of w1 <, 950rpm≤n3≤1050rpm, 1150rpm≤n4≤1250rpm.It is specific at one In embodiment, w1=0 °, n1=1000rpm, n2=1200rpm.

In other words, in vehicle parking idling operation, steering wheel does not work substantially, when speed is zero, electric machine assembly 200 For CAN communication line without input signal, electric machine assembly 200 drives oil pump component 100 with the operation of low idling operation, and motor shaft 220 turns Speed is minimum, guarantees the cooling requirements of electric machine assembly 200, the noise of motor pump assembly 1000 is minimum, and fast response time.

Motor pump assembly 1000 is arranged in v > 0km/h, and when w≤w1, and the revolving speed n of control motor shaft 220 meets: n5≤n≤n6.Preferably, 5 ° of w1 <, 1450rpm≤n5≤1550rpm, 1550rpm≤n6≤1650rpm are specific at one Example in, n5=1500rpm, n6=1600rpm.

In other words, it is run in vehicle launch, steering wheel does not rotate or minor rotation, and when wheel does not turn to, DC current is micro- Small, electric machine assembly 200 drives 100 idling work of oil pump component, and the revolving speed of motor shaft 220 slightly improves, in driver turn The revolving speed (for example 6000rpm can be promoted) of motor shaft 220 can be promoted when steering wheel rapidly, guarantees full-vehicle steering demand, Simultaneously as having generated road noise sound in vehicle operational process, the noise that revolving speed improves is no more than or is overlapped vehicle noise, motor The operating noise of oil pump assy 1000 does not interfere with driving experience.

Motor pump assembly 1000 is arranged in v=0km/h, and at 5 ° of w >, controls revolving speed n and the direction of motor shaft 220 The corner w of disk is positively correlated.

In other words, in vehicle pivot stud, the corner of steering wheel is bigger, and the revolving speed of motor shaft 220 is bigger, motor pump The pressure and flow for the hydraulic oil that assembly 1000 exports are also bigger, so that wheel realizes bigger corner, and motor pump at this time The operating noise of assembly 1000 is slightly larger than the road noise of tire, can remind passerby's Vehicular turn, vehicle is at this with lesser noise It is highly-safe under operating condition.

Motor pump assembly 1000 is arranged in 0 < v < v1, and the revolving speed n and speed v of motor shaft 220 are negatively correlated, motor The revolving speed n of axis 220 and the corner w of steering wheel are positively correlated.

In other words, when running at a low speed in the car, speed is lower or the corner of steering wheel is bigger, and motor shaft 220 turns Speed is bigger, and the pressure and flow for the hydraulic oil that motor pump assembly 1000 exports are also bigger, so that wheel realizes bigger corner, And at this time motor pump assembly 1000 export hydraulic oil pressure and flow substantially pivot stud when half, motor pump The operating noise of assembly 1000 is lower than the road noise of tire, so as to realize mute steering.

Motor pump assembly 1000 is arranged in v >=v1, and the revolving speed n of control motor shaft 220 meets: n≤n2.

It is understood that high vehicle speeds, such as v1 >=60km/h, the general Emergency avoidance that carries out are arranged in v >=v1 It applies, needs to control the flow of steering at this time, prevent vehicle under high speed conditions, promptly beating direction causes to overturn, at this time The revolving speed n for limiting motor shaft 220 is not more than value n2, i.e., control electric machine assembly 200 is run in middle low speed.Preferably, 2350rpm≤ n2≤2450rpm。

Further, motor pump assembly 1000 can be set into v >=v1, and when w > w1, control motor shaft 220 Revolving speed n meets: n1≤n≤n2.That is, when the vehicle is driving at high speed, even if driver hits steering wheel, motor shaft 220 Revolving speed n also control between n1 and n2, wheel is also only finely adjusted to realize Emergency avoidance.Preferably, v1 >=60km/h, 1550rpm≤n1≤1650rpm, 2350rpm≤n2≤2450rpm, in a specific embodiment, v1=80km/h, n1 =1600rpm, n2=2400rpm.

Preferably, the acceleration a of motor shaft 220 meets: a≤a1.That is, the maximum of control motor shaft 220 accelerates Degree prevents electric machine assembly 200 from throwing load and causes to impact to the oil circuit of steering system, and the steering good hand touch of steering system, steering wheel is not Easily shake.

Fig. 3 and Fig. 4 are shown in another embodiment of the invention, flow valve 300, safety valve, electricity in the embodiment Thermomechanical components 200, oil pump component 100, internal sound insulation cover 400 structure can be same as the previously described embodiments, the embodiment is relative to Fig. 1 Be that the both ends of spool 330 are connected to by damping hole 1022 with the distinctive points of embodiment shown in Fig. 2, and sound insulation cover chamber 402 with Outer layer sound insulation chamber 501 completely cuts off.

As shown in figure 4, the both ends of damping hole 1022 are connected with the both ends of spool 330 respectively, internal sound insulation cover 400 can be equipped with The buffering oil duct 1021 being connected to sound insulation cover chamber 402, buffering oil duct 1021 can be located on top cover 410, and damping hole 1022 is located at On internal sound insulation cover 400, and one end of damping hole 1022 is connected with buffering oil duct 1021, the other end and high pressure chest of damping hole 1022 102 are connected.

Motor pump assembly 1000 has oil discharge passage 1010 and fuel-displaced branch 1020, oil discharge passage 1010 and high pressure chest 102 connections, oil discharge passage 1010 are connected to the lower end of high pressure chest 102, for example oil discharge passage 1010 can be by running through lower cover 120 lower channel 121 is connected with the lower end of high pressure chest 102, and fuel-displaced branch 1020 can be located at the side wall 420 of internal sound insulation cover 400 Interior, fuel-displaced branch 1020 is connected to oil discharge passage 1010, and fuel-displaced branch 1020 is connected with the other end of damping hole 1022.

The output oil pressure of oil pump component 100 arrives the rear end of flow valve 300 by damping hole 1022, makes 300 front and back of flow valve End pressure difference, which is equal to 1022 pressure difference of damping hole, makes flow so that the demand force value of the elastic component 320 of flow valve 300 be made to become smaller The opening and closing pressure of valve 300 is more smooth, while can reduce the size of elastic component 320, is spring for elastic component 320 Embodiment, can reduce the line footpath of spring, reduce volume and cost.

Motor pump assembly 1000 according to an embodiment of the present invention, the lightweight of motor pump assembly 1000 is horizontal high, accounts for Space is small, and manufacturing cost is low, and oil pump component 100 and the direct contact area of other component are small, can be greatly decreased secondary The soundproof effect of noise source, motor pump assembly 1000 is good, and the method offset by oil liquid pulsation, can reduce motor pump The pulsation of assembly 1000 is fluctuated, and realizes the active noise reduction of motor pump assembly 1000, while the operating friction power of oil pump component 100 It is small, so that the work efficiency of motor pump assembly 1000 is high.

The invention also discloses a kind of steering systems 10, and with reference to Fig. 6, the steering system 10 of the embodiment of the present invention is provided with State the motor pump assembly 1000 of any embodiment description.

The invention also discloses a kind of vehicles 1, and with reference to Fig. 7, the vehicle 1 of the embodiment of the present invention is provided with any of the above-described kind of reality The steering system 10 of example description is applied, optionally, the vehicle 1 of the embodiment of the present invention can be bus car.

Furthermore unless specifically defined or limited otherwise, the terms such as term " installation ", " connected ", " connection ", " fixation " are answered It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection, It can be electrical connection；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary Logical or two elements interaction relationship, unless otherwise restricted clearly.For the ordinary skill in the art, may be used To understand the concrete meaning of above-mentioned term in the present invention as the case may be.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (19)

1. a kind of motor pump assembly characterized by comprising

Electric machine assembly；

Oil pump component, on the end cap of the electric machine assembly, the upper end cover of the oil pump component has the oil pump modular support Through the upper end cover and the end cap chamber that is connected to the high pressure chest of the oil pump component；

Internal sound insulation cover, the internal sound insulation cover are located at outside the oil pump component, and are limited with the oil pump component filled with low The internal layer sound insulation chamber of pressure oil, the internal layer sound insulation chamber are connected to the low pressure chamber of the oil pump component, and the internal sound insulation cover is equipped with Sound insulation cover chamber；

Flow valve, the flow valve include spool and elastic component, and the sound insulation cover chamber and the end cap chamber limit go out to be used to accommodate The valve chamber of the spool, the elastic component elasticity are only against between the spool and the roof of the sound insulation cover chamber, the flow The outlet of valve is located on the peripheral wall of the end cap chamber；

Safety valve, the safety valve are arranged to the pressure release when the pressure of the high pressure chest is greater than scheduled pressure value.

2. motor pump assembly according to claim 1, which is characterized in that the spool constitutes the valve of the safety valve , there are two valve ports, described two valve ports to be connected to respectively with the high pressure chest and the internal layer sound insulation chamber for tool on the spool.

3. motor pump assembly according to claim 2, which is characterized in that the spool includes sleeve and pedestal, described Two valve ports are respectively provided on the peripheral wall and bottom wall of the sleeve.

4. motor pump assembly according to claim 3, which is characterized in that the safe valve core of the safety valve include according to Secondary connected seal section, guide section and limit section, the pedestal are equipped with limit hole, and the limit section is matched with the limit hole It closes, the internal perisporium of the guide section and the sleeve cooperates, and the elastic component of the safety valve is set in outside the limit section, and only It is against between the pedestal and the end face of the guide section.

5. motor pump assembly according to claim 1, which is characterized in that the end cap chamber is configured to stepped hole to be formed The cascaded surface is only supported in the lower end of cascaded surface, the spool.

6. motor pump assembly according to claim 5, which is characterized in that the end towards the cascaded surface of the spool There is lug boss on face.

7. motor pump assembly according to claim 1, which is characterized in that the internal sound insulation cover includes:

Top cover；

Side wall, the top cover are connected with the side wall, and the side wall is connected with the end cap of the electric machine assembly.

8. motor pump assembly according to claim 7, which is characterized in that the top cover is tight by screw thread with the side wall Firmware is connected, and the end cap of the electric machine assembly is formed as one with the side wall.

9. motor pump assembly according to claim 1, which is characterized in that the end cap of the electric machine assembly is equipped with fuel-displaced Channel, the oil discharge passage are connected by the lower channel of the lower cover through the oil pump component with the lower end of the high pressure chest.

10. motor pump assembly according to claim 1 to 9, which is characterized in that further include:

Outer blimp, the outer blimp is located at at least partly outer of the internal sound insulation cover, and limits with the internal sound insulation cover Out for filling the outer layer sound insulation chamber of low pressure oil.

11. motor pump assembly according to claim 10, which is characterized in that the roof of the sound insulation cover chamber is equipped with interior Blimp through-hole, the internal sound insulation cover through-hole are connected to the sound insulation cover chamber and the outer layer sound insulation chamber.

12. motor pump assembly according to claim 10, which is characterized in that the electric machine assembly is liquid-cooled, described Outer layer sound insulation chamber is connected to the motor cavity of the electric machine assembly, the low pressure of the motor cavity of the electric machine assembly and the oil pump component Chamber connection.

13. motor pump assembly according to claim 10, which is characterized in that the outer layer sound insulation chamber and the internal layer every Partition is equipped between sound chamber.

14. motor pump assembly according to claim 10, which is characterized in that the outer blimp is that metal-nylon is compound Material is made.

15. motor pump assembly according to claim 1, which is characterized in that the oil pump component is external gear rotary pump Or cycloid gear pump or vane pump or plunger pump.

16. motor pump assembly according to claim 1, which is characterized in that the electric machine assembly is liquid-cooled, and described The motor cavity of electric machine assembly is connected to the low pressure chamber of the oil pump component.

17. motor pump assembly according to claim 16, which is characterized in that the rotor of the electric machine assembly is immersed in low In pressure oil.

18. a kind of steering system, which is characterized in that setting is total just like motor pump described in any one of claim 1-17 At.

19. a kind of vehicle, which is characterized in that be provided with steering system as claimed in claim 18.