CN107140007A - The housing assembly and its device of a kind of driven steering device - Google Patents

The housing assembly and its device of a kind of driven steering device Download PDF

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Publication number
CN107140007A
CN107140007A CN201610881871.8A CN201610881871A CN107140007A CN 107140007 A CN107140007 A CN 107140007A CN 201610881871 A CN201610881871 A CN 201610881871A CN 107140007 A CN107140007 A CN 107140007A
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CN
China
Prior art keywords
assembly
installation cavity
screw rod
input shaft
shaft
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Granted
Application number
CN201610881871.8A
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Chinese (zh)
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CN107140007B (en
Inventor
刘富强
张勇
李玉
武建斌
王东亮
邱实
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China North Vehicle Research Institute
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China North Vehicle Research Institute
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Application filed by China North Vehicle Research Institute filed Critical China North Vehicle Research Institute
Priority to CN201610881871.8A priority Critical patent/CN107140007B/en
Priority to CN201910257460.5A priority patent/CN110282006B/en
Publication of CN107140007A publication Critical patent/CN107140007A/en
Application granted granted Critical
Publication of CN107140007B publication Critical patent/CN107140007B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B62D3/04—Steering gears mechanical of worm type
    • B62D3/06—Steering gears mechanical of worm type with screw and nut
    • B62D3/08—Steering gears mechanical of worm type with screw and nut using intermediate balls or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B62D3/04—Steering gears mechanical of worm type
    • B62D3/10—Steering gears mechanical of worm type with worm engaging in sector or roller gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • B62D5/0406—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box including housing for electronic control unit

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The present invention provides a kind of housing assembly and its device of driven steering device, the housing assembly includes the first installation cavity, second installation cavity and the 3rd installation cavity, first installation cavity, to be arranged along horizontal direction, is non-penetrating formula cavity, and second installation cavity is non-penetrating formula cavity, 3rd installation cavity is through cavity, first installation cavity and the second installation cavity connection, the first installation cavity and the 3rd the installation cavity connection, second installation cavity and the 3rd installation cavity are not connected.The housing bulk strength is high, the impact endurance test shock of complexity can be born, using reliable；Good manufacturability, it is easy to shape, cost is low, is adapted to batch production；Can integrated level it is high, assembling is good, it is easy to the overall package of transfer.

Description

The housing assembly and its device of a kind of driven steering device
Technical field
The invention belongs to Mechatronic Systems and road vehicle application field, and in particular to a kind of heavy circulating ball type bimodulus is electronic dynamic Power transfer and its housing assembly.
Background technology
From the point of view of automobile industry situation, with the continuous growth of fuel combustion vehicle quantity, the pollution that vehicle discharges to environment is got over Come more serious, while oil is also faced with the crisis of exhaustion as the non-renewable energy, therefore be used as low emission or zero-emission Electric vehicle, motor vehicle driven by mixed power have the advantages that energy-saving and environmental protection have become the focus of government and social concerns because of it, into For the core development topic of current wheeled vehicle technology.Electric motor driven power steering technology (EPS) is because its integrated level is high, save, exempt from dimension The significant advantages such as shield at home and abroad be used widely by home vehicle field, but be used for turning to load≤2t home vehicle or multiply With car, and suitable for electric motor coach, heavy truck, special vehicle etc. large-tonnage electric motor driven power steering technology still in blank shape State, the market demand is urgent, have a extensive future.
From the point of view of formula of joining the army conditions of demand, wheel military vehicle is because its single-axle load is big, complicated (such as trench, cross-country of road conditions Hill path, ice and snow road and muddy road surface etc.), the factor such as use condition harshness, its control stability requires significantly larger than civilian Vehicle, wheeled vehicle chassis is high maneuverability demand when highway march to be met is fought, and is met again on extreme harsh road There is preferable riding stability and cross-country security under condition.Wherein, wheeled vehicle steering is then influence wheeled vehicle The most direct factor of control stability and driving safety, its own performance decides the globality of wheeled vehicle chassis system Energy.At present, China's wheel military vehicle steering uses hydraulic power-assist steering system substantially, and executing agency is circulating ball type liquid Power-assisted steering device is pressed, so, Vehicular turn returns and is just relying primarily on steering positional parameter, such as castor and kingpin inclination Determine, when positional parameter error is larger vehicle can return just less able and unstable, so as to influence vehicle maneuverability；And for example, Vehicle can have the sensation for turning to " unstable " when running at high speed, i.e. power steering is excessive, and this is by circulating ball type hydraulic booster What the principle of steering gear was determined, steering pump provides power by engine in hydraulic power-assist steering system, engine speed during high speed Lifting, hydraulic booster system pressure rises, and power steering increases naturally, although steering pump new at present can be accomplished at a high speed Oil pump flow pressure release declines during steering, but the problem of " unstable " can not be solved at all.
From the point of view of future developing trend, with the development of power battery technology, Technology of Hybrid Electric Vehicle, motor technology etc., wheel Formula vehicle is developed rapidly to digitlization, complete electrochemical, unmanned, intelligentized direction, and Conventional drum wheel steering system Tomorrow requirement can not be met, intelligent steering system, active front steering system, wire-controlled steering system etc. are increasing new turn Gradually emerged to system, and these novel steering systems then need to rely on electric motor driven power steering technology to be extended or rise Level.
At present, electric motor driven power steering technology is applied in small passenger car field maturation, and in structure type, it is big absolutely Majority is pinion-and-rack steering device or steering tube pillar transfer, and is had not been used on large-tonnage, heavy vehicle, its Technical problem underlying is：
1st, transfer output torque is big, and integrated level requires high, and master-plan difficulty is big.Because heavy vehicle steeraxle is carried The practical factors such as the unicity (being normally in piggyback pod) of lotus big (generally more than 4 tons) and power steering gear position, Requirement can not be met using pinion-and-rack steering device or steering tube pillar transfer, it is necessary to use overall construction intensity High, the circulating ball type structure of strong shock resistance, and current ball-and-nut steering structure exists only in heavy hydraulic power-assisted and turned Into device, had no bearing on electric motor driven power steering system.
2nd, critical component, portion structure intensity requirement are high, and system matches difficulty is big.Due to medium sized vehicle, not only steeraxle is carried Lotus is big, and the applying working condition of the type vehicle is also more severe, is used more in the case where non-paved road or mud twist cross-country road, vehicle turns Sizable shock loading will be born to system, and these shock loadings have a sizable part to need power steering gear to hold By therefore, housing, the intensity of drive disk assembly determine the reliability and security of steering in power steering gear.Just follow For global formula hydraulic power steering gear, the part such as its screw rod, sector shaft, housing, steering nut is often because extraneous is rushed Hit load and damage.
3rd, Machinery electricity matching difficulty is big.Under certain spatial dimension constraint and power supply quality constraints, reduce electricity as far as possible Body is accumulated, and effectively utilizes power of motor characteristic, matches big speed ratio structure, realizes low power demand, the characteristic of big torque output It is the technical bottleneck of heavy vehicle electric motor driven power steering technology.
In view of the above-mentioned problems, the invention provides a kind of new transfer, so that the steering for solving heavy vehicle faces Various problems.This transfer includes：Input shaft and screw rod assembly, sector shaft assembly, support seat assembly, turbine and worm, Interior outer end cap assembly, motor assembly etc., therefore a platform is needed, above-mentioned part is integrated, and require this platform technology It is good, it is easy to process, and have enough intensity, to ensure that whole driven steering device is stable and reliable in work.It is above-mentioned to solve Problem, meets the use requirement of the driven steering device, need to design a platform i.e. shell structure.
The content of the invention
To meet the use requirement of the driven steering device, the present invention provides a kind of wheeled heavy-duty vehicle steering The housing of circular ball type electric power steering gear, the housing good manufacturability, it is easy to shape, there is enough intensity, can hold By shock loading complicated and changeable, using reliable.
To achieve these goals, technical scheme is as follows：
A kind of housing assembly of driven steering device, it is characterised in that the housing assembly includes the first installation cavity, Second installation cavity and the 3rd installation cavity, first installation cavity are non-penetrating formula cavity to be arranged along horizontal direction, described the Two installation cavitys are non-penetrating formula cavity, and the 3rd installation cavity is through cavity, first installation cavity and the second installation cavity Connection, the first installation cavity and the 3rd the installation cavity connection, second installation cavity and the 3rd installation cavity are not connected.
Preferably, the first installation cavity be it is horizontally disposed be a changeable internal diameter non-penetrating formula cavity, by conduct The non-penetrating end bottom surface of reference plane starts to process the first inner headed face, secondary transmission chamber, the first inner threaded surface, primary transmission successively Chamber, the second inner headed face.
Preferably, the second installation cavity is the non-penetrating formula cavity of a changeable internal diameter vertically, by non-penetrating Bottom surface starts to be machined with the 3rd inner headed face, worm screw chamber, the 4th inner headed face, the second inner threaded surface successively.
Preferably, the intersecting vertical degree of the first installation cavity axis and the 3rd installation cavity axis is not more than
Preferably, the axis of first installation cavity and the second installation cavity is vertical, second installation cavity and the 3rd peace The diameter parallel behaveing affectedly.
Preferably, case material uses spheroidal graphite cast-iron QT450-10GB1348-2009.
A kind of driven steering device, including foregoing housing assembly.
Further comprise as the preferred driven steering device, input shaft and screw rod assembly, sector shaft assembly, branch Support seat assembly, turbine, worm screw, inner cap assembly, corner torque sensor, outer end cap assembly, plum blossom adapter sleeve assembly, motor total Into the cavity of one end open is closed in horizontally disposed one end inside the housing assembly, and input shaft is installed with screw rod assembly In the cavity of housing assembly, input shaft is arranged on one end of closing, the input shaft and screw rod assembly with screw rod assembly one end The other end reach housing assembly cavity outside, along the direction vertical with screw rod assembly with input shaft in housing assembly Sector shaft assembly is installed and sector shaft assembly is engaged with input shaft with screw rod assembly by gear；The support seat assembly set Input shaft is located at screw rod assembly outside and for spacing input shaft and screw rod assembly；The worm screw edge is total with screw rod with input shaft Into vertical direction, in housing assembly, plum blossom adapter sleeve assembly and motor are sequentially coaxially installed in one end of the worm screw Assembly；The turbine and worm engaging, the worm drive input shaft are rotated with screw rod assembly；The inner cap assembly is set in On input shaft and screw rod assembly and installed in the outside of turbine, corner torque sensor and axial direction and input shaft and screw rod assembly Connection, the outer end cap assembly is set on input shaft and screw rod assembly and installed in the outside of corner torque sensor, and It is fixed on housing assembly front end.
Preferably, inside the housing assembly it is horizontally disposed be a changeable internal diameter non-penetrating formula cavity, by Start to process the first inner headed face B, secondary transmission chamber C, the first inner threaded surface D, one successively as the non-penetrating end bottom surface A of reference plane Level drive cavity E, the second inner headed face F；Its body interior is vertically also machined with the non-penetrating formula cavity of a changeable internal diameter, It is machined with the 3rd inner headed face H, worm screw chamber I, the 4th inner headed face J, the second inner threaded surface K successively by non-penetrating bottom surface G；
The input shaft is arranged in the first inner headed face B with screw rod assembly one end, and the support seat assembly is arranged on first In inner threaded surface D, described turbine is arranged in primary transmission chamber E, and inner cap assembly press-fits the second inner circle in housing assembly Face F, is limited in the round boss formed between the second inner headed face F and primary transmission chamber E；Corner torque sensor is fixed on the inner The outside of cap assembly, it is coaxial with input shaft and screw rod assembly；The worm screw is arranged on worm screw intracavitary, and described worm screw one end is arranged on In 3rd inner headed face H；Outer end cap assembly is installed on the outer end cap flange mounting surface N of housing assembly, with input shaft and screw rod assembly Coaxially；Sector shaft assembly is installed on secondary transmission chamber C；Worm screw is arranged in screw rod chamber I, is engaged with turbine, is passed through the 4th inner circle Face J ball bearing and fixed with the second inner threaded surface K locking nuts being spirally connected；Plum blossom adapter sleeve assembly one end connecting screw rod top End, one end connects the output spline of motor assembly；The motor flange that motor assembly is bolted on housing assembly is installed Face M；Motor torque is passed to input shaft and screw rod assembly by worm and gear, and torque is converted into input by input shaft with screw rod assembly Axle assembly passes through sector shaft assembly output torque.
Preferably, the housing assembly includes：Housing 1A, output shaft oil sealing, rectangular seal, plug cock, unilateral thrust Bearing, ball bearing, angular contact bearing；Output shaft oil sealing is installed on coaxial with sector shaft assembly in secondary transmission chamber C；
Rectangular seal is installed on housing upper screwed hole with plug cock, for after lubricating oil is injected to secondary transmission chamber C Sealed oiling mouthful；Single thrust bearing is installed on housing 1A the first inner headed face B；Ball bearing is installed in secondary transmission chamber C It is coaxial with sector shaft assembly；Angular contact bearing is installed on primary transmission chamber E the 3rd inner headed face H.
Preferably, the input shaft includes with screw rod assembly：First straight pin, input shaft, twiot arm, needle roller axle Hold, the second straight pin, screw shaft, steel ball conduit, conduit pressing plate, steering nut 29, described screw shaft one end is axially set Reducing inner chamber body, described screw shaft one end is machined with through hole, and the through hole is connected with inner chamber body, and one end of the twiot arm is inserted Enter inner chamber body, second straight pin inserts through hole, so that one end of locking elastic torsion bar and the coaxial relative rotation of screw shaft； The needle bearing insertion reducing inner chamber body is interior and is resisted against the sidepiece of inner chamber body；Axially set in the middle part of the input shaft empty Cavity configuration, the end of input shaft second sets through hole, and the through hole is connected with cavity structure, and the other end of the twiot arm is inserted In the cavity structure for entering input shaft, first straight pin inserts through hole, so that the locking elastic torsion bar other end and input shaft Relatively rotate；The first end of the input shaft is against needle bearing；The other end of the screw shaft sets steering nut, described turn It is machined with to nut upper surface after many places steel ball hand-hole, injection steel ball, steel ball conduit is installed on steering nut top and solid Determine the conduit pressing plate of steel ball conduit.
Preferably, the sector shaft assembly includes：Sector shaft, sector shaft side cover plate, sector shaft adjusting pin, sector shaft are adjusted Whole nut, sector shaft plug screw and needle bearing；Wherein, the sector shaft includes tooth fan and axle, and the tooth fan is machined with involute The sector gear structure of tooth is bored, one end of the axle is provided with annular groove, and sector shaft adjusting pin insertion tooth fans collar connected in star, The sector shaft plug screw is set in outside sector shaft adjusting pin and has certain interval with sector shaft adjusting pin, the axle One end sets sector shaft side cover plate, and needle bearing is set between the sector shaft side cover plate and axle；Along on the axial direction of axle, One end of the side cover plate and axle, which has, sets the hole run through on certain interval, the side cover plate, described sector shaft adjustment Pin extends through the hole on side cover plate from annular groove, and the adjusting nut is enclosed on sector shaft adjusting pin and sets and be resisted against The outside of sector shaft side cover plate.
Preferably, the support seat assembly includes：Support base, unilateral thrust angular contact bearing；The support base is change The insertion loop configuration of internal diameter, exterior circumference is machined with external screw thread, and the unilateral thrust angular contact bearing is installed on support base 41 It is internal；Seat assembly is supported axially to be set with input shaft with after screw rod assembly, being fastened on by its external screw thread in the first of housing assembly Flank D, realize the installation of input shaft and screw rod assembly with it is spacing.
Preferably, the turbine internal diameter disc is machined with keyway, Surface Machining is jagged, turbine and input shaft and screw rod Assembly is configured to rotate coaxially.
Preferably, the screw rod upper end is machined with external splines, lower end is smooth, cylindrical peripheral surface internal diameter disc, and lower end is axially pacified Loaded on screw rod intracavitary, coordinate with angular contact bearing inner headed face and install, top suit is machined with externally threaded hollow locking plug screw, tightly Gu in the second inner threaded surface K.
Preferably, the inner cap assembly of the steering gear includes：Inner end cap, outside framework oil seal, the positioning of corner torque sensor Plate, sensor fix block rubber；The inner interior surface is threaded hole, for installing angle torque sensor location-plate And corner torque sensor；The sensor fixes block rubber and fixes sensor leading-out terminal and be fixed on inner interior surface.
Preferably, the plum blossom adapter sleeve assembly two ends are internal spline structure, outside its one end internal spline connecting worm Splined end, one end connects the output spline of motor assembly, plays shaft coupling；The motor assembly passes through plum blossom adapter sleeve After assembly is axially installed with worm screw, housing 1A motor mounting surface is fixed on by flange connection.
In addition, the present apparatus greatly improves the reliable of system by the innovative design to critical component, key position Property, impact property and exploitativeness, are mainly reflected in：
1. in present apparatus housing assembly scheme, input shaft and screw rod assembly mounting axis install cavity axis with sector shaft assembly Intersecting vertical degree be not more than
2. case material is using spheroidal graphite cast-iron QT450-10GB1348-2009 and carries out Ageing Treatment, with farthest The performance of material is played, casing rigidity is improved；
3. hull outside uses round-corner transition, integrally uses cast form, 2 °~3 ° of pattern draft, improve processing efficiency and Crudy；
4. the bottom surface mounting means of housing assembly is installed for 5 holes, enhances the bonding strength between device and car body；
5. sector shaft case-carbonizing (0.8-1.2) mm, hardness requirement (58-62) HRC, farthest to have played material Performance, improve joint arm intensity；
6. sector shaft side cover plate uses 4 points of connected mode with housing assembly, it is ensured that the assembling intensity of sector shaft assembly, dress The globality and air-tightness put；
7. rubber blanket is added in sector shaft assembly, when sector shaft face of gear with steering nut face of gear engagement place in length There is gap after phase, big load use, it can realize flexible automatic compensation within the specific limits；
8. input shaft is machined with after steel ball hand-hole at 4, injection steel ball with steering nut upper surface in screw rod assembly, can The circulation of two-way steel ball is formed, the stress for decomposing steel ball and steering nut inner surface helicla flute is reduced, effectively improves steering spiral shell Female reliability with circulating steel ball；
9. conduit pressing plate is monoblock type slab construction in input shaft and screw rod assembly, can large area with turning to spiral shell Female patch is closed, and has effectively decomposed the stress of steel ball, it is ensured that steel ball is smooth to be rolled, and greatly reduces steel ball when bearing huge external force, It is difficult to which the bad possibility of roof fall or top, improves the reliability of device.
Compared with prior art, the present invention has the advantage that：
Electric motor driven power steering system (EPS) due in terms of its drive form, realization principle with traditional hydraulic booster system System is mainly reflected in compared to having a clear superiority：
1. compared with prior art, the excellent effect of housing assembly of the invention is：Bulk strength is high, can bear complexity Impact endurance test shock, using reliable；Good manufacturability, it is easy to shape, cost is low, is adapted to batch production；Can integrated level height, assembling Property is good, it is easy to the overall package of transfer.
2nd, simple in construction, saving space.Electric motor driven power steering system eliminates the steering pump of hydraulic booster system, hydraulic tube The parts such as road, oil tank, enormously simplify steering system structural, save interior space, and make wheeled vehicle steering more It is easy to flexible arrangement.
3rd, energy consumption is saved.Electric motor driven power steering system only just provides power-assisted, generation energy expenditure, and liquid in Vehicular turn Pressure power steering is not when vehicle is turned to, and system is also operated always, and energy dissipation is serious.
4th, non-maintaining property.For hydraulic power-assist steering system, seepage is not present in electric motor driven power steering system, changes The general maintenance sex chromosome mosaicism such as seal, pipeline.
5th, vehicle handling stability and security are improved.Different from the single assist characteristic of hydraulic power-assist steering system, electricity The assist characteristic of dynamic power steering system is controllable factor, and optimal power-assisted can be provided under various driving cycles, is reduced by road The disturbance to steering caused by the injustice of face, improves the steering characteristic of vehicle, mitigates steering behaviour during low vehicle speeds Vertical power, improves steering stability during high vehicle speeds.
6th, there is provided the algorithm of new intelligent control.
The invention provides a kind of heavy circulating ball type bimodulus driven steering device, its by steering gear housing assembly, It is input shaft and screw rod assembly, sector shaft assembly, support seat assembly, turbine, worm screw, inner cap assembly, corner torque sensor, outer The parts such as end cap assembly, plum blossom adapter sleeve assembly, motor assembly are constituted.Present apparatus overall configuration integrated level is very high, existing Circulating ball, which is completed, in the spatial dimension of equal tonnage circulatory spherical hydraulic power-assisted steering gear compares turbine with tooth fan structure, big retarding The various structures such as worm structure, corner torque sensor, motor assembly it is integrated, specifically, its input shaft and screw rod assembly Steering gear housing assembly secondary transmission intracavitary is axially mounted to, by supporting seat assembly axial limiting and fixation；Axial turbine is adopted It is installed on flat key connected mode on input shaft and screw rod assembly, positioned at primary transmission intracavitary；Screw rod is axially mounted to steering gear Housing assembly worm screw intracavitary is simultaneously at a fully engaged with input shaft and steering nut in screw rod assembly；Inner cap assembly and input shaft with Screw rod assembly is co-axially mounted and is anchored on inside steering gear housing assembly shell；Corner torque sensor assembly need to input shaft with Screw rod assembly is co-axially mounted, on the outside of inner cap assembly, is consolidated by the internal thread hole processed in inner end cap in inner cap assembly It is fixed；Outer end cap assembly flange is connected to housing assembly housing outer face, coaxial with input shaft and input shaft in screw rod assembly；Plum Flower adapter sleeve assembly is two ends internal spline structure one end connecting worm external splines end, one end connection motor assembly output shaft external splines End, complete connection steering gear and motor it is integrated.Its architectural feature is totally different from the pinion and-rack of small passenger car, turned to The forms such as pipe column type efficiently solve the problems, such as overall output torque and system architecture, and it has used for reference circulating ball type hydraulic power The structure of steering gear, instead of in circulating ball type hydraulic power steering device using big retarding than mechanism and corner torque sensor etc. Rotary valve structure, in the case where not increasing exceptional space, realize the transformation that hydraulic power is driven to intelligent electric, on an equal basis Volume cycle ball hydraulic power steering device is compared, power demand reduction by 300%, output torque capacity lifting 5%.
Brief description of the drawings
Fig. 1 is heavy circulating ball type bimodulus driven steering device top plan view.
Fig. 2 is heavy circulating ball type bimodulus driven steering device left view profile.
Fig. 3 is the right pseudosection of heavy circulating ball type bimodulus driven steering device.
Fig. 4 is steering gear housing top plan view
Fig. 5 is that the steering gear housing right side regards primary transmission chamber profile
Fig. 6 is steering gear housing bottom surface structure figure
Fig. 7 is steering gear housing left view structure chart
Fig. 8 is that the steering gear housing right side regards structure chart
Fig. 9-1 is the right pseudosection of steering gear housing assembly.
Fig. 9-2 is steering gear housing assembly left view profile.
Fig. 9-3 is that steering gear housing assembly overlooks part sectioned view.
Figure 10 is input shaft and screw rod assembly structure chart.
Figure 11 is sector shaft assembly structure chart.
Figure 12 is support base assembly structure chart.
Figure 13 is turbine structure schematic diagram.
Figure 14 is worm structure schematic diagram.
Figure 15 is steering gear inner end cap assembly structure chart.
Figure 16 is outer end cap assembly structure chart；
Figure 17 is the dimensional structure diagram of housing assembly；
Figure 18 is the dimensional structure diagram of housing assembly.
Embodiment
The embodiment to the present invention is described in detail below in conjunction with the accompanying drawings.
Herein, if without specified otherwise, being related to formula, "/" represents division, and "×", " * " represent multiplication.
As shown in figs. 17-18, a kind of housing assembly of driven steering device, the housing assembly (1) includes first Installation cavity 1-1, the second installation cavity 1-2 and the 3rd installation cavity 1-3, the first installation cavity 1-1 is to be arranged along horizontal direction, is Non-penetrating formula cavity, the second installation cavity 1-2 is non-penetrating formula cavity, and the 3rd installation cavity 1-3 is through cavity, institute The first installation cavity 1-1 and the second installation cavity 1-2 connections are stated, the first installation cavity 1-1 and the 3rd installation cavity the 1-3 connection is described Second installation cavity 1-2 and the 3rd installation cavity 1-3 are not connected.
The non-penetrating formula cavity is the cavity of one end open one end closing.
Preferably, the first installation cavity 1-1 be it is horizontally disposed be a changeable internal diameter non-penetrating formula cavity, by making On the basis of face non-penetrating end bottom surface (A) start process the first inner headed face (B), secondary transmission chamber (C), the first inner threaded surface successively (D), primary transmission chamber (E), the second inner headed face (F).
Preferably, the second installation cavity 1-2 is the non-penetrating formula cavity of a changeable internal diameter vertically, passed through by non- Logical bottom surface (G) starts to be machined with the 3rd inner headed face (H), worm screw chamber (I), the 4th inner headed face (J), the second inner threaded surface (K) successively.
Preferably, the intersecting vertical degree of the first installation cavity axis and the 3rd installation cavity axis is not more than
Preferably, the axis of first installation cavity and the second installation cavity is vertical, second installation cavity and the 3rd peace The diameter parallel behaveing affectedly.
Preferably, case material uses spheroidal graphite cast-iron QT450-10GB1348-2009.
Preferably, the first installation cavity 1-1 is input shaft and screw rod assembly installation cavity 1-1, the second installation cavity 1-2 is whirlpool Wheel, worm screw and motor assembly installation cavity 1-2, the 3rd installation cavity 1-3 are sector shaft assembly installation cavity 1-3, wherein input shaft and spiral shell Bar assembly installation cavity 1-1 is lateral arrangement, installs nose end to the left, worm screw and motor assembly installation cavity 1-2 and sector shaft assembly peace The 1-3 that behave affectedly is arranged in housing forward end, and the installation nose end of two chambers is respectively positioned on housing upper end, worm screw and motor assembly installation cavity 1-2 On the left of sector shaft assembly installation cavity 1-3.
Wherein nose end is installed in the left side of input shaft and screw rod assembly installation cavity 1 fluting 1-a and concave station 1-b such as Figure 18 institutes Show)；Housing upper center, which has on boss 1-c, boss 1-c, installation screwed hole；There is fixed seat 1-d housing lower end (such as Figure 18 institutes Show), there is reinforcement 1-e (as shown in figure 18) between fixed seat 1-d and between fixed seat 1-d and housing, to improve fixed seat Intensity；There is reinforcement 1-f between the sector shaft assembly installation cavity 1-3 lower ends face of cylinder and housing and fixed seat 1-d (such as Figure 18 institutes Show), to improve the intensity on the sector shaft assembly installation cavity 1-3 lower ends face of cylinder.
Simultaneously to solve problem of the prior art, the present invention provides a kind of heavy circulating ball type bimodulus electric motor driven power steering dress Put, as shown in Figure 1-Figure 3, it includes：Housing assembly 1, input shaft and screw rod assembly 2, sector shaft assembly 3, support seat assembly 4, Turbine 5, worm screw 6, inner cap assembly 7, corner torque sensor 8, outer end cap assembly 9, plum blossom adapter sleeve assembly 10, motor assembly 11；
Preferably, the housing assembly uses housing assembly noted before.
The cavity of one end open, input shaft and screw rod assembly are closed in horizontally disposed one end inside the housing assembly 2 are arranged in the cavity of housing assembly, and input shaft is arranged on one end of closing, the input shaft and spiral shell with the one end of screw rod assembly 2 The other end of bar assembly 2 reaches the outside of the cavity of housing assembly, edge and input shaft and screw rod assembly 2 in housing assembly 1 Sector shaft assembly 3 is installed and sector shaft assembly 3 is engaged with input shaft with screw rod assembly 2 by gear in vertical direction；Institute State support seat assembly 4 and be set in input shaft with the outside of screw rod assembly 2 and for spacing input shaft and screw rod assembly 2 so that input Axle can not be movable up and down with screw rod assembly 2, but may be rotated；The worm screw 6 along with input shaft and screw rod assembly 2 Vertical direction, in housing assembly 1, plum blossom adapter sleeve assembly 10 and electricity are sequentially coaxially installed in one end of the worm screw 6 Machine assembly 11；The turbine 5 and worm engaging, the worm screw 6 simultaneously drive input shaft to be rotated with screw rod assembly 2；The inner end cap Assembly 7 is set on input shaft and screw rod assembly 2 and installed in the outside of turbine 5, corner torque sensor 8 with it is axial with it is defeated Enter axle to be connected with screw rod assembly 2, the outer end cap assembly 9 is set in input shaft with screw rod assembly 2 and installed in corner turning The front end of housing assembly 1 is simultaneously fixed in the outside of square sensor 8.
The invention provides a kind of driven steering device of the heavy vehicle of Novel structure, present apparatus overall configuration collection It is very high into spending, tooth fan structure is completed in the spatial dimension of existing equal tonnage circulatory spherical hydraulic power-assisted steering gear, big The various structures such as speed reducing ratio turbine and worm structure, corner torque sensor, motor assembly it is integrated, therefore eliminate hydraulic booster The parts such as steering pump, fluid pressure line, the oil tank of system, enormously simplify steering system structural, save interior space, and make Wheeled vehicle steering is more convenient for flexible arrangement.
Preferably, described heavy vehicle is preferably vehicle of the load more than more than 5 tons.
Preferably, the housing assembly 1 is the pith of device, its horizontally disposed body interior is more than one Become the non-penetrating formula complicated cavity of internal diameter, as shown in figure 4, processing the successively by the non-penetrating end bottom surface A as reference plane One inner headed face B, secondary transmission chamber C, the first inner threaded surface D, primary transmission chamber E, the second inner headed face F；Its body interior is along vertically Direction is also machined with the non-penetrating formula cavity of a changeable internal diameter, as shown in figure 5, being machined with successively by non-penetrating bottom surface G 3rd inner headed face H, worm screw chamber I, the 4th inner headed face J, the second inner threaded surface K.
As shown in fig. 6, the outside bottom surface of housing assembly 1 is machined with internal thread mounting hole at many places, preferably 5, top surface processing There is upper end cover flange mounting surface L as shown in Figure 4 and motor flange mounting surface M as shown in Figure 7, side processing is just like Fig. 8 institutes The outer end cap flange mounting surface N shown.
Input shaft is axially mounted in housing assembly 1 with screw rod assembly 2, by supporting the axial limiting of seat assembly 4 and fixation, Support seat assembly 4 is installed on the first inner threaded surface D of housing assembly 1, it is preferred to use screw connection manner；Worm gear 5 is connected by flat key Mode be axially mounted on input shaft and screw rod assembly 2, in primary transmission chamber E；Inner cap assembly 7 passes through tight fit Mode press-fits the second inner headed face F in housing assembly 1, is limited in the circle formed between the second inner headed face F and primary transmission chamber E Boss；Corner torque sensor 8 is fixed by screws in the outside of inner cap assembly 7, coaxial with input shaft and screw rod assembly 2； Outer end cap assembly 9 is bolted, and the outer end cap flange mounting surface N of housing assembly 1 is installed on, with input shaft and screw rod assembly 2 is coaxial；Sector shaft assembly 3 is installed vertically on secondary transmission chamber C, and tooth fan is nibbled with input shaft with the steering nut in screw rod assembly 2 Close, be bolted the upper end cover flange mounting surface L for being fixed on housing assembly 1；Worm screw 7 is axially mounted in screw rod chamber I, with Turbine 6 is engaged, and is fixed by the 4th inner headed face J ball bearing and with the second inner threaded surface K locking nuts being spirally connected；Plum blossom connects Female connector assembly 10 is both sides internal spline structure, axial connecting screw rod top and the output spline of motor assembly 11；Motor assembly 11 are bolted on the motor flange mounting surface M of housing assembly 1；The present apparatus is passed to motor torque by worm and gear Torque is converted into input axle assembly with screw rod assembly 2 and exported by sector shaft assembly 3 by input shaft and screw rod assembly 2, input shaft Torque.
The present invention is capable of all parts of integrated steering device by the housing assembly of above-mentioned special internal structure, In the case of not increasing exceptional space, the driven steering device of heavy vehicle is realized.
Preferably, in present apparatus housing assembly scheme, input shaft and screw rod assembly mounting axis are pacified with sector shaft assembly The intersecting vertical degree of axis of behaveing affectedly is not more thanSo that the area of contact of sector shaft face of gear and steering nut face of gear Maximum is reached, compared with the overproof meshing relation of position degree, transmission efficiency will lift more than 5%.
Preferably, case material is using spheroidal graphite cast-iron QT450-10GB1348-2009 and carries out Ageing Treatment, with maximum The performance of material is played to degree, casing rigidity is improved.
Preferably, hull outside uses round-corner transition, cast form is integrally used, 2 °~3 ° of pattern draft is improved and added Work efficiency rate and crudy.
The bottom surface mounting means of housing assembly is installed for 5 holes, enhances the bonding strength between device and car body.
As shown in Fig. 9-1 to Fig. 9-3, the housing assembly 1 includes：Housing 1A, output shaft oil sealing 12, rectangular seal 13rd, plug cock 14, single thrust bearing 15, ball bearing 16, angular contact bearing 17；Output shaft oil sealing 12 is installed on secondary transmission chamber Coaxial with sector shaft assembly 3 in C, effect is to close the output end of sector shaft assembly 3 and housing bottom surface, it is ensured that lubricating oil is not from tooth Fan output shaft end leakage；
Rectangular seal 13 is installed on housing upper screwed hole with plug cock 14, for injecting lubrication to secondary transmission chamber C Sealed oiling mouthful after oil；The periphery tight fit of single thrust bearing 15 is installed on housing 1A the first inner headed face B, and axially with it is non- Insertion bottom surface A is brought into close contact, and is installed in order to input shaft and screw rod assembly 2, spacing and ensure that its rotation is smooth；Ball bearing 16 It is installed on secondary transmission chamber C interior coaxial with sector shaft assembly 3, effect is to ensure sector shaft assembly 3 and housing 1A axiality And reduce the rotary resistance of sector shaft assembly 3；Angular contact bearing 17 is installed in primary transmission chamber E, its periphery tight fit The 3rd inner headed face H is installed on, bottom surface is brought into close contact with non-penetrating bottom surface G, in order to the installation, spacing and ensure its turn of worm screw 6 It is dynamic smooth.
As shown in Figure 10, the input shaft includes with screw rod assembly 2：First straight pin (21), input shaft (22), elasticity are turned round Bar (23), needle bearing (24), the second straight pin (25), screw shaft (26), steel ball conduit (27), conduit pressing plate (28), steering Nut (29), described screw shaft (26) one end axially sets reducing inner chamber body, and described screw shaft (26) one end is machined with logical Hole, through hole is processed preferably along perpendicular to axial direction；The through hole is connected with inner chamber body, one end of the twiot arm (23) Inner chamber body is inserted, second straight pin (25) inserts through hole, so that one end of locking elastic torsion bar (23) and screw shaft (26) Coaxial relative rotation；Needle bearing (24) the insertion reducing inner chamber body is interior and is resisted against the sidepiece of inner chamber body；The input Cavity structure is axially set in the middle part of axle (22), and the end of input shaft (22) second sets through hole, the through hole and cavity knot Structure is connected, in the cavity structure of the other end insertion input shaft of the twiot arm (23), the first straight pin (21) insertion Through hole, so that the relative rotation of locking elastic torsion bar (23) other end and input shaft (22)；The first end of the input shaft against Needle bearing (24)；The other end of the screw shaft (26) sets steering nut, and the steering nut upper surface is machined with many places After steel ball hand-hole, injection steel ball, leading for steel ball conduit (27) and stationary balls conduit (27) is installed on steering nut top Pipe pressing plate (28).
Preferably, screw shaft (26) main body is many reducing cylindrical structures, one end is processed as high bright and clean along outer surface Helicla flute is spent, other end end is machined with reducing inner chamber body and square groove, reducing inner chamber body are opened in end axially inward Bottom is vertically machined with through hole, and twiot arm (23) one end is loaded vertically, is inserted and become by the second straight pin (25) Footpath inner chamber body bottom through-hole, so as to lock itself and the coaxial relative rotation in screw shaft (26), then by needle bearing (24) edge Equidirectional loading inner chamber body.
Preferably, needle bearing (24) is not contacted with twiot arm (23), its actual effect is being capable of axial machine Tool limitation input shaft (22) and the gap of screw shaft (26), it is to avoid assembling, using the change of process intermediate gap to twiot arm (23) extruding is caused, the reliability and input shaft of twiot arm (23) and the realizability of screw rod assembly (2) can be effectively improved；
Described input shaft (22) one end is machined with vertical direction through hole and is axially machined with inner chamber body, is inwardly processed along end face For hexagon boss, hypotenuse and horizontal direction angle are respectively ± 5 degree, are made vertically after twiot arm (23) other end stretches into, First straight pin (21) is tightly fitted in into through hole, turned so that locking elastic torsion bar (23) other end is relative with input shaft (22) It is dynamic.Preferably, the hexagon end face of input shaft (22) is butted on needle bearing (24) inner ring just, hexagon boss it is upper and lower Each 2 inclined-planes form the relative rotation space of ± 5 degree of formation just with the square row groove of screw shaft (26), and its actual effect is to be formed The mechanical position limitation that input shaft (22) is relatively rotated with screw shaft (26), effectively prevent twiot arm during assembling, use (23) torsion situation excessively, improves the reliability of screw shaft (26)；
Preferably, the first straight pin and the second straight pin are in interference fit with through hole.
From screw shaft (26), the other end installs steering nut (29) vertically, and Surface Machining has many places steel ball injection thereon Hole, after injection steel ball, installs steel ball conduit (27), its role is to ensure, when screw shaft (26) rotates, to be squeezed by helicla flute Another steel ball hand-hole can smoothly be entered from a steel ball hand-hole by extruding the internal steel ball of steering nut (29), be again returned to Steering nut (29) is internal, and steel ball conduit (27) itself does not possess fixing device, it is necessary to be fixed by conduit pressing plate (28), Conduit pressing plate (28) is fastened on behind steering nut (29) upper surface, and its actual effect not only secures steel ball conduit (27), and energy It is enough effectively to decompose steel ball conduit (27) stress.The upper surface of steering nut 29 is machined with many places steel ball hand-hole, preferably 4, note Enter after steel ball, steel ball conduit 27 and conduit pressing plate 28 be installed, it is ensured that when screw shaft 26 rotates, steel ball can screw shaft 26, Steering nut 29, steel ball conduit 27, the closed channel interior circulation of the formation of conduit pressing plate 28 are rolled, and the tooth fan side of sector shaft is processed There is involute at 3 to bore tooth, cone tooth is engaged with sector shaft 31, and the horizontal movement of steering nut 29 is converted into turning for sector shaft 31 It is dynamic；Input shaft 22 processes inclined-plane with the connection end of screw shaft 26, it is ensured that can ensure low-angle between input shaft 22 and screw shaft 26 Scope is relatively rotated.
, can large area preferably, conduit pressing plate is monoblock type slab construction in input shaft and screw rod assembly Fitted with steering nut, effectively decomposed the stress of steel ball, it is ensured that steel ball is smooth to be rolled, and is greatly reduced steel ball and is being born huge During external force, it is difficult to which the bad possibility of roof fall or top, improves the reliability of device.
Input shaft is machined with after steel ball hand-hole at 4, injection steel ball with steering nut upper surface in screw rod assembly, being capable of shape Into the circulation of two-way steel ball, the stress for decomposing steel ball and steering nut inner surface helicla flute is reduced, steering nut is effectively improved With the reliability of circulating steel ball.
As shown in figure 11, the sector shaft assembly (3) includes：Sector shaft (31), sector shaft side cover plate (32), sector shaft are adjusted Whole pin (33), sector shaft adjusting nut (34), sector shaft plug screw (35) and needle bearing (36)；Wherein, the sector shaft (31) Including tooth fan and axle, tooth fan is machined with the sector gear structure that involute bores tooth, and it is recessed that one end of the axle is provided with annular Groove, sector shaft adjusting pin insertion tooth fan collar connected in star, the sector shaft plug screw be set in outside sector shaft adjusting pin and with Sector shaft adjusting pin has certain interval, and one end of the axle sets sector shaft side cover plate, the sector shaft side cover plate and axle Between set needle bearing (36)；Along on the axial direction of axle, one end of the side cover plate and axle has certain interval, institute The hole for setting and running through on side cover plate is stated, described sector shaft adjusting pin (33) extends through the hole on side cover plate from annular groove, The adjusting nut (34) is enclosed on sector shaft adjusting pin (33) and sets and be resisted against the outside of sector shaft side cover plate (32).
Wherein, the sector shaft 31 is sector gear structure, and the tooth fan of sector shaft is machined with many places, and preferably involute is bored Tooth, it must bore tooth sideways with steering nut 29 and engage, and the axial bottom end face of the axle of sector shaft is machined with tiny middle position groove, its Main function is to make rotation be more convenient for recognizing that annular groove bottom centre position is machined with internal thread hole, for pacifying with measuring Toothing fans axial adjustment pin 33 and sector shaft adjusting pin 33 is fixed on into ring by installing sector shaft plug screw 35 in inner headed face riveting Connected in star bottom；The end face center position of sector shaft side cover plate 32 is machined with internal thread through hole, and its role is to tooth is fanned The top of axial adjustment pin 33 can be connected through sector shaft side cover plate 32 with sector shaft adjusting nut 34, and top surface is separately machined with through hole 4 Place, its object is to be bolted, upper end cover flange mounting surface L is fixed on by sector shaft assembly 3；The sector shaft adjustment The top of pin 33 is processed as external thread structure, is easy to connect adjusting nut, bottom is processed as smooth, flattened cylindrical structure, centre bit Put and be machined with external screw thread, it can be arranged at the internal thread hole of the base circle groove center of sector shaft 31 and pass through sector shaft spiral shell The compression of plug 35 bottom is smooth, flattened cylindrical upper surface, is connected so as to realize with the axial direction of sector shaft 31；Sector shaft adjusting nut 34 The top of sector shaft adjusting pin 33 is threadedly connected to, is brought into close contact with the top of sector shaft side cover plate 32, axial adjustment is fanned by rotary teeth Nut 34, can lock or synchronous micro-adjusting sector shaft adjusting pin 33 and sector shaft 31 axial location；The periphery of needle bearing 36 with The bottom inner headed face tight fit of sector shaft side cover plate 32 is installed, and inner headed face is installed with the top periphery tight fit of sector shaft 31, and it is made Be ensure sector shaft 31, sector shaft side cover plate 32, the axiality of sector shaft adjusting pin 33 and reduce sector shaft 31 rotate resistance Power.
Preferably, the sector shaft also includes rubber blanket 37, the rubber blanket 37 is arranged on end face and tooth in groove Between the end face for fanning axial adjustment pin 33, and described adjusting pin 33 compresses rubber blanket 37.
Preferably, the diameter for the end that described adjusting pin 33 is arranged in groove is greater than the other positions of adjusting pin 33 Diameter.Preferably, the diameter of end is 1.6-2.2 times of other positions diameter.Pass through the increase of end diameter, Neng Goubao Demonstrate,prove the contact of large area, by increasing capacitance it is possible to increase the pressure of contact.
Preferably, described needle bearing is arranged on the other positions of adjusting pin 33 and is resisted against end.
Sector shaft output end a Surface Machinings have serration, for realizing that spline is connected with steering mechanism, b Surface Machinings There is tiny middle position groove, for completing the centering of steering mechanism's assembling；Annular groove is stepped hole, and the hole of bottommost is used for successively Lay the large end face of rubber blanket and sector shaft adjusting pin.
Sector shaft (2) output terminals A surface serration surface roughness is 1.6.
Rubber blanket (3) is added in the sector shaft assembly, between sector shaft tooth fan and the cooperation of steering nut rack occur Automatic compensation can be realized after gap within the specific limits.
The sector shaft side cover plate (7), which machined through hole at 4, is used for its connection with the total housing of electric direction varying device, it is ensured that Electric circulation ball turns to the globality of machine, air-tightness.
Preferably, sector shaft case-carbonizing (0.8-1.2) mm, hardness requirement (58-62) HRC, farthest to send out The performance of material has been waved, joint arm intensity is improved.
Sector shaft side cover plate uses 4 points of connected mode with housing assembly, it is ensured that the assembling intensity of sector shaft assembly, device Globality and air-tightness.
Preferably, by adding rubber blanket, when sector shaft face of gear and steering nut face of gear engagement place it is long-term, There is gap after big load use, it can realize flexible automatic compensation within the specific limits.
Rubber blanket is arranged on to the endoporus bottom position at sector shaft side cover end, sector shaft adjusting pin is sequentially loaded into, fans tooth The large end face of axial adjustment pin is fitted with rubber blanket, and sector shaft plug screw is screwed in the screw position of sector shaft endoporus, compresses sector shaft Adjusting pin large end face and rubber blanket, it is ensured that the decrement of rubber blanket is in 2mm, after sector shaft plug screw is screwed into place, are installed by riveting, Sector shaft plug screw is compressed, sector shaft plug screw annular boss is preferably compressed, by sector shaft side cover plate screwed hole of centre, will be pressed into rolling The side cover of needle bearing screws in sector shaft adjusting pin, sector shaft adjusting pin is spirally connected and passes through sector shaft side cover plate, by adjusting Whole sector shaft adjusting nut realizes axial locking and unblock sector shaft, sector shaft adjusting pin, the position of sector shaft plug screw.
The adjustment operation principle of the present invention is as follows：
The gap between tooth fan on rack and sector shaft on steering nut is protected by adjusting sector shaft adjusting pin Card.After gap is adjusted, sector shaft adjusting pin, sector shaft side cover plate and sector shaft adjusting nut are integrally fixed at together, Sector shaft plug screw and sector shaft are integrally fixed at together.Steering machine in use for some time, rack and tooth on steering nut Fan axle on tooth fan abrasion occurs, its fit clearance just increases therewith, can cause sector shaft adjusting pin head step surface and A certain degree of abrasion occurs between the right side of sector shaft plug screw, the rubber blanket now compressed makes sector shaft to the left automatically It is mobile, the fit clearance between tooth fan and rack is compensate for automatically, and the amount of movement of compensation is exactly the abrasion on sector shaft plug screw surface Amount.
As shown in figure 12, the support seat assembly 4 includes：Support base 41, unilateral thrust angular contact bearing 42；The support Seat 41 is becomes the insertion loop configuration of internal diameter, and exterior circumference is machined with external screw thread, the close-fitting of unilateral thrust angular contact bearing 42 Conjunction is installed on inside support base 41；Seat assembly 4 is supported axially to be set with input shaft with after screw rod assembly 2, being fastened by its external screw thread In the first inner threaded surface D of housing assembly 1, realize the installation of input shaft and screw rod assembly 2 with it is spacing.
As shown in figure 13, the internal diameter disc of turbine 5 is machined with keyway, and its role is to pass through flat key connected mode axial direction Input shaft and the axle of screw rod assembly 2 are installed on, Surface Machining has breach at 6, mitigates weight, reduce rotary inertia, turbine 5 and input Axle is configured to rotate coaxially with screw rod assembly 2.
The internal diameter disc of turbine 5 is machined with keyway 61, Surface Machining jagged 62, and its actual effect has been that it is possible to Effect mitigates turbine weight, reduces rotary inertia, and turbine 5 is configured to rotate coaxially with input shaft with screw rod assembly 2；Emphasize Point out, the end face of the turbine 5 is machined with internal thread adjusting hole 63 at 2, and its actual effect is, in assembling process, only By using special tooling or instrument at interior threaded adjustment hole 63, the position of turbine 5 and worm screw 6 just can be accurately positioned or finely tuned Degree is with engaging situation, so as to ensure the realizability and adjustable of driving-chain.
As shown in figure 14, the upper end of screw rod 6 is machined with external splines, and lower end is smooth, cylindrical peripheral surface internal diameter disc, lower end axle To being installed in screw rod chamber, installed with the inner headed face tight fit of angular contact bearing 17, top suit is machined with externally threaded hollow Plug screw is locked, the second inner threaded surface K is fastened on.
As shown in figure 15, the inner cap assembly 7 of the steering gear includes：Inner end cap 71, outside framework oil seal 72, corner torque sensing Device location-plate 73, sensor fix block rubber 74；The inner surface of inner end cap 71 is threaded blind hole, turns for installing angle Square sensor location-plate 73 and corner torque sensor 8, are axially processed as diameter bore；The outside framework oil seal is installed on inner end cap In 71 diameter bores, its periphery and the big end inner headed face tight fit of the diameter bore of inner end cap 71 are limited in reducing end face, it is acted on It is to prevent the internal lubrication oil of housing assembly 1 from leaking, damage corner torque sensor 8；The corner torque sensor location-plate 73, which are bolted mode, is fixed on the inner surface tapped blind hole of inner end cap 71, and its role is to avoid corner torque sensor 8 There is angle vertically and offset in outer ring；The sensor is fixed block rubber 74 its role is to fixed sensor leading-out terminal and avoided Foreign matter enters inside steering gear.
As shown in figure 16, shown outer end cap assembly 9 includes outer end cap 91, dust ring 92, deep groove ball bearing 93；The outer end Its outer surface of lid 91 is machined with through hole, and effect is that can be bolted mode is fixed on outer end cap flange mounting surface N, its Inner surface is processed into reducing communicating structure axially outward, and inner headed face I and circular groove II, deep groove ball bearing 93 are machined with successively It is installed in inner headed face I, the rotation its object is to ensure input shaft 22 is smooth and is installed on housing 1A in outer end cap assembly 9 Afterwards, input shaft and screw rod assembly 2 and primary transmission chamber E, secondary transmission chamber C axiality are ensure that, is emphasized, it is described outer Internal thread hole 94 at the outermost face processing 3 of end cap 91, its actual effect is, convenient under unmanned line traffic control pattern, installs defeated additional Enter shaft locking device or adjusting apparatus；The dust ring 92 is irregular rubber seal, its rectangular cross-section and triangle sets Into concave plane, its main body be square-section rubber seal, outside be obtuse triangle cross section sealing circle minimum diameter Less than rectangular cross section internal diameter, its rectangular cross section is installed in circular groove II, due to its special shape, its actual effect Fruit is that it is possible to the irregular gap between effective closed outer end lid 91 and input shaft 22, prevents dust from entering, and is protection corner The important means of torque sensor, standard or general sealing ring can not meet requirement.
The two ends of plum blossom adapter sleeve assembly 10 are processed as internal spline structure, the outer flower of its one end internal spline connecting worm 6 Key end, one end connects the output spline of motor assembly 11, makes between motor assembly 11 and worm screw 6 for flexible connection.
The motor assembly 11 is 24V DC permanent magnetism synchronous machines, and 7 Ns of rice of rated power 1.6kW nominal torques are specified Rotating speed 2200rpm, Integrated Hall formula position sensor, square internal thread mounting flange, it is the power source of the present apparatus, passes through plum Flower adapter sleeve assembly 10 with worm screw 6 is axially mounted finish after, the mode being bolted is fixed on motor flange mounting surface M.
The heavy circulating ball type bimodulus driven steering device of the present invention and circulatory spherical hydraulic power-assisted steering gear structure Difference is that heavy circulating ball type bimodulus driven steering device uses worm gear structure and corner torque sensor Structure, instead of the hydraulic reversing valve structure of circulatory spherical hydraulic power-assisted steering gear；Direct current generator is used for power-assisted power source, is substituted Hydraulic steering pump power source；Involved heavy circulating ball type bimodulus driven steering device compact overall structure, it is integrated Du Genggao, greatly reduces the number of components of power steering system, and has reached the purpose of active control power steering.
As shown in Fig. 1 to Figure 16, the heavy circulating ball type bimodulus driven steering device work involved by patent of the present invention The feature for making principle is as follows：
One power assisted manual pattern
When rotating input shaft 22 forward or backwards by steering wheel, due to passing through elasticity between input shaft 22 and screw shaft 26 Torsion bar 23 connects and there is certain angle, is preferably ± 10 degree of angular displacement idle stroke, so, screw shaft 26 exists with input shaft 22 When reaching angular displacement null way limit, it can be rotated coaxially with input shaft 22, the axial direction of corner torque sensor 8 and input shaft 22nd, screw shaft 26 is connected, and control system calculates motor assembly 11 by gathering the output torque value of corner torque sensor 8 Target torque, power torque is exported with torque control model motor assembly 11, motor assembly 11 passes through plum blossom adapter sleeve Assembly 10, transmits torque to worm screw 6, is slowed down by worm gear 5 after increasing is turned round and is applied to torque on screw shaft 26 and drive screw Axle 26 is rotated, now, in input shaft and screw rod assembly 2 steel ball can follow the screw rod helical pitch of screw shaft 26 and inside steering nut 29 Roll, rolling steel balls are directed in steel ball conduit 27 by steering nut 29 by upper surface perforate, steel ball passes through steel ball conduit 27 Guiding is returned to inside steering nut 29 again；The steel ball that the inner loop of steering nut 29 is rolled provides horizontal direction and laterally pushed away Power, promotes steering nut 29 to move horizontally, because steering nut 29 is engaged with sector shaft 31, sector shaft assembly 3 will turn to spiral shell The thrust of mother 29 is converted into torque with linear motion stroke and exported with angular displacement.
When stopping is rotationally movable thereby input shaft 22, because the twiot arm 23 between input shaft 22 and screw shaft 26 exists In rotation process, overcome the angular displacement stroke between input shaft 22 and screw shaft 26 and produce elastic deformation, in input shaft 22 Elastic deformation will be recovered in the case of without external force, that is, return back to steering wheel centre position.
In the controls, it is innovative to introduce intelligent power-assisted characteristic function with turning to active safety characterisitic function, tool For body, intelligent power-assisted function is that the steering resolved in transient state time domain scale according to vehicle speed condition, steering wheel angle situation hinders Force motor transient state target torque value, its basic skills is as follows：
Wherein：
Motor assembly (target) torque Tm(t)(NM) it is system-computed output valve, is in the unit time, further preferably For output valve in 50ms；
Driver's minimum hand-power Fmin(N) it is system design setting value, preferably 20N；
Driver's maximum hand-power Fmax(N) it is system design setting value, preferably 50N；
Electric direction varying device primary transmission compares im(constant) is default value, i.e. worm gear and the gearratio of worm screw, is preferably 25-35, more preferably 30；
Electric direction varying device secondary transmission compares in(constant) is the gearratio of default value, i.e. screw shaft and sector shaft, excellent Elect 21-31, more preferably 26.13 as；
Steering gear forward efficiency ηm(0~1) it is default value, preferably 0.6；
Steering wheel angle θsw(t)(rad) it is sensor collection value, steering wheel rotational angle in unit interval, preferably 50ms, Preferred scope is -15.7~15.7；Unit interval herein and motor assembly (target) torque Tm(t)(NM) unit interval phase Together；
Steering gear connection angular gear ratio isFor default value, preferred scope is 1~1.2；
Pivot stud moment of resistance Tw(NM) it is default value, preferred scope is 2000~4000；
Speed v(t)(km/h) it is sensor collection value, preferred scope is 0~120；
Propons foreign steamer cornerPreferred scope is -0.54~0.54；
Wheel steering locking angle θ0(rad) it is design input value, absolute value preferably is 0.61；
Steering wheel radius R0(m) it is default value, preferably 0.21.
In addition, its key property for turning to active safety characterisitic function is, status information (such as car when being travelled according to vehicle Speed, turning radius, road surface inclination angle etc.) and vehicle structure feature (such as wheelspan, wheelbase, weight), under different travel speeds, move State anticipation simultaneously parses the maximum angle α for assuming that steering wheel is allowed under critical condition of the vehicle in generation rollover or sideslip0； When pilot control vehicle exceedes this maximum angle time, motor is reversely increased rapidly steering drag, prevention side by system Rotated to disk, occur turning on one's side or sideslip situation so as to be prevented effectively from pilot control vehicle, greatly promote driving safety, its base This method is：
Wherein：
The maximum safe corner α of steering wheel0(°) is system-computed output valve；
Wheelspan B (mm) is default value, and preferred scope is 800~1500；
Wheelbase L (mm) is default value, and preferred scope is 2000~3500；
Wheel pivoted arm a (mm) is default value, and preferred scope is 40~100；
Vehicle centroid height hg(mm) it is default value, preferred value is 400~1500；
Speed v(t)(km/h) it is driver collection value, preferred scope is 0~120；
Road surface side tilt angle (barycenter side tilt angle) βk(°) is the angle of inclination of road surface with respect to the horizontal plane, is driver Collection value, preferred scope is -30 °~30 °；
Electric direction varying device secondary transmission compares in(constant) is the gearratio of default value, i.e. screw shaft and sector shaft, excellent Elect 21-31, more preferably 26.13 as；
G is acceleration of gravity, the quadratic power of 9.8 meter per seconds.
The unmanned pattern of two line traffic controls
Control system by calculate corner torque sensor 8 when target rotation angle value of the front hook value with receiving is calculated The absolute object position moved the need for motor assembly 11, is rotated to absolute object with position control mode motor assembly 11 Position；Motor assembly 11 drives worm screw 6 to be rotated with worm gear 5 by plum blossom adapter sleeve assembly 10；Preferably, worm screw 6 and worm gear 5 Between speed reducing ratio be 30.Because worm gear 5 is rotated coaxially with screw shaft 26, i.e. rotational angular velocity and rotational angle is identical, now, defeated Enter steel ball in axle and screw rod assembly 2 can follow the screw rod helical pitch of screw shaft 26 and in the roll inside of steering nut 29, steering nut 29 Rolling steel balls are directed in steel ball conduit 27 by upper surface perforate, steel ball is oriented to return to again by steel ball conduit 27 to be turned To the inside of nut 29；The steel ball that the inner loop of steering nut 29 is rolled provides horizontal direction lateral thrust, promotes steering nut 29 Move horizontally, because steering nut 29 is engaged with sector shaft 31, sector shaft assembly 3 transports the thrust of steering nut 29 and straight line Dynamic stroke is converted into torque and exported with angular displacement.
It is in the controls, innovative to propose the wheel target rotation angle algorithm intervened based on Vehicular yaw angular motion state, Specifically：First, pass through the parameter calculations such as steering wheel angle, electric direction varying device secondary transmission ratio, steering gear connection angular gear ratio Outgoing direction disk target rotation angle and the functional relation at wheel target deflection angle, i.e.,：
Second, vehicle is travelled and in steering procedure, due to the dynamic characteristic of vehicle itself, in different speeds, non-Tongfang To necessarily occurring more or less vehicle body yaw phenomenon in the case of disk corner, and vehicle produce excessive yaw angle will likely Vehicle is caused to occur the danger breakked away or turned on one's side, therefore, control system in a frequency domain, estimates the vehicle under different vehicle speed conditions The transitive relation of yaw angle and steering wheel angle, by setting Vehicular yaw side door limit value ωr(S) different speeds can be accessed Lower steering wheel corner threshold value θp(S), so, when occurring Vehicular yaw side door limit value under a certain speed, compare θpAnd θ (S)p Size, i.e., as steering wheel angle threshold value θp(S) with steering wheel target rotation angle θpRatio be less than 1 when, system will be used automatically Steering wheel angle threshold value θp(S) substitution steering wheel target rotation angle θp；Steering wheel angle threshold value θp(S) turn with steering wheel target Angle θpRatio when being more than or equal to 1, maintain steering wheel target rotation angle θp, the dynamic of wheel target rotation angle is intervened so as to realize. θ is wherein obtained by formula belowp(S)：
Wherein:
The various middle parameter such as following table of the above:
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should It is defined when by claim limited range.

Claims (10)

1. a kind of housing assembly of driven steering device, it is characterised in that the housing assembly (1) includes first and installed Chamber, the second installation cavity and the 3rd installation cavity, first installation cavity, to be arranged along horizontal direction, are non-penetrating formula cavity, institute The second installation cavity is stated for non-penetrating formula cavity, the 3rd installation cavity is through cavity, first installation cavity and the second peace It behave affectedly connection, the first installation cavity and the 3rd the installation cavity connection, second installation cavity and the 3rd installation cavity are not connected.
2. housing assembly as claimed in claim 1, it is characterised in that the first installation cavity be it is horizontally disposed be one changeable The non-penetrating formula cavity of internal diameter, the first inner headed face (B), two are processed by the non-penetrating end bottom surface (A) as reference plane successively Level drive cavity (C), the first inner threaded surface (D), primary transmission chamber (E), the second inner headed face (F).
3. housing assembly as claimed in claim 1 or 2, it is characterised in that the second installation cavity is vertically more than one Become the non-penetrating formula cavity of internal diameter, be machined with the 3rd inner headed face (H), worm screw chamber (I), the successively by non-penetrating bottom surface (G) Four inner headed faces (J), the second inner threaded surface (K).
4. housing assembly as claimed in claim 1 or 2, it is characterised in that first, which installs cavity axis and the 3rd, installs cavity axis Intersecting vertical degree be not more than
5. housing assembly as claimed in claim 1 or 2, it is characterised in that the axle of first installation cavity and the second installation cavity Line is vertical, the diameter parallel of second installation cavity and the 3rd installation cavity.
6. housing assembly as claimed in claim 1 or 2, it is characterised in that case material uses spheroidal graphite cast-iron QT450- 10GB1348-2009。
7. housing assembly as claimed in claim 3, it is characterised in that the housing assembly (1) includes：Housing (1A), output Shafting oil envelope (12), rectangular seal (13), plug cock (14), single thrust bearing (15), ball bearing (16), angular contact bearing (17)；Output shaft oil sealing (12) is installed on coaxial with sector shaft assembly (3) in secondary transmission chamber (C)；
Rectangular seal (13) is installed on housing upper screwed hole with plug cock (14), for injecting profit to secondary transmission chamber (C) Sealed oiling mouthful after lubricating oil；Single thrust bearing (15) is installed on the first inner headed face (B) of housing (1A)；Ball bearing (16) is pacified Loaded on coaxial with sector shaft assembly (3) in secondary transmission chamber (C)；Angular contact bearing (17) is installed on the of primary transmission chamber (E) Three inner headed faces (H).
8. a kind of driven steering device, including housing assembly (1), input shaft and screw rod assembly (2), sector shaft assembly (3), Worm screw (6), motor assembly (11), it is characterised in that the housing assembly (1) is one of claim 1-7 housing assembly, institute The input shaft stated is arranged on the first installation cavity with screw rod assembly (2), and described sector shaft assembly (3) is arranged on the 3rd installation cavity, Described worm screw (6) and motor assembly (11) is arranged in the second installation cavity.
9. driven steering device as claimed in claim 8, it is characterised in that also include：, support seat assembly (4), turbine (5), inner cap assembly (7), corner torque sensor (8), outer end cap assembly (9), plum blossom adapter sleeve assembly (10), motor assembly (11), the other end of the input shaft and screw rod assembly (2) reaches the outside of the cavity of housing assembly, in housing assembly (1) Sector shaft assembly (3) is installed and causes sector shaft assembly (3) and input in the interior edge direction vertical with screw rod assembly (2) with input shaft Axle is engaged with screw rod assembly (2) by gear；It is outside simultaneously with screw rod assembly (2) that the support seat assembly (4) is set in input shaft For spacing input shaft and screw rod assembly (2)；The worm screw (6) is installed along the direction vertical with screw rod assembly (2) with input shaft In housing assembly (1), plum blossom adapter sleeve assembly (10) and motor assembly are sequentially coaxially installed in one end of the worm screw (6) (11)；The turbine (5) and worm engaging, worm screw (6) the driving input shaft are rotated with screw rod assembly (2)；The inner end cap Assembly (7) is set on input shaft and screw rod assembly (2) and installed in the outside of turbine (5), corner torque sensor (8) with Axially it is connected with input shaft with screw rod assembly (2), the outer end cap assembly (9) is set on input shaft and screw rod assembly (2) simultaneously And installed in the outside of corner torque sensor (8), and it is fixed on housing assembly (1) front end.
10. driven steering device as claimed in claim 9, it is characterised in that the input shaft and screw rod assembly (2) one End is arranged in the first inner headed face (B), and the support seat assembly (4) is arranged in the first inner threaded surface (D), described turbine (5) it is arranged in primary transmission chamber (E), inner cap assembly (7) press-fits the second inner headed face (F) in housing assembly (1), is limited in The round boss formed between second inner headed face (F) and primary transmission chamber (E)；Corner torque sensor (8) is fixed on inner end cap The outside of assembly (7), it is coaxial with input shaft and screw rod assembly (2)；The worm screw is arranged on worm screw intracavitary, and described worm screw one end is set Put in the 3rd inner headed face (H)；Outer end cap assembly (9) is installed on the outer end cap flange mounting surface (N) of housing assembly (1), and defeated Enter axle and screw rod assembly (2) is coaxial；Sector shaft assembly (3) is installed on secondary transmission chamber (C)；Worm screw (7) is arranged on screw rod chamber (I) It is interior, engaged with turbine (6), pass through the ball bearing of the 4th inner headed face (J) and the locking nut being spirally connected with the second inner threaded surface (K) It is fixed；Plum blossom adapter sleeve assembly (10) one end connecting screw rod top, the output spline of one end connection motor assembly (11)；Motor Assembly (11) is bolted on the motor flange mounting surface (M) of housing assembly (1)；Worm and gear passes to motor torque Torque is converted into input axle assembly with screw rod assembly (2) and passes through sector shaft assembly by input shaft and screw rod assembly (2), input shaft (3) output torque.
CN201610881871.8A 2016-10-09 2016-10-09 A kind of housing assembly and its device of electric power steering device Expired - Fee Related CN107140007B (en)

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CN201910257460.5A CN110282006B (en) 2016-10-09 2016-10-09 Manual mode of electric power steering device

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CN108438043A (en) * 2018-04-24 2018-08-24 联禾厚普（太仓）精密机械有限公司 A kind of full aluminium vehicle steering engine housing
CN108454691A (en) * 2018-03-20 2018-08-28 铜陵市逸欣机械制造有限公司 A kind of training gear of vehicle shell based on new material
CN110294012A (en) * 2019-06-27 2019-10-01 全兴精工集团有限公司 A kind of twin-tub recirculating ball power steering gear

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CN110843422B (en) * 2019-12-02 2021-03-05 蒋祥初 Automobile anti-impact stabilizing device
CN113335371B (en) 2021-06-30 2022-04-08 南京航空航天大学 Multifunctional electric circulating ball steering system of commercial vehicle and control method thereof

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CN110294012A (en) * 2019-06-27 2019-10-01 全兴精工集团有限公司 A kind of twin-tub recirculating ball power steering gear

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CN110282006A (en) 2019-09-27
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