CN206067867U - A kind of electric direction varying device input shaft and screw rod assembly and its device - Google Patents

A kind of electric direction varying device input shaft and screw rod assembly and its device Download PDF

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Publication number
CN206067867U
CN206067867U CN201621107112.8U CN201621107112U CN206067867U CN 206067867 U CN206067867 U CN 206067867U CN 201621107112 U CN201621107112 U CN 201621107112U CN 206067867 U CN206067867 U CN 206067867U
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China
Prior art keywords
assembly
input shaft
screw rod
shaft
rod assembly
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CN201621107112.8U
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Chinese (zh)
Inventor
刘海涛
张勇
李玉
王成玲
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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Abstract

This utility model provides a kind of electric direction varying device input shaft and screw rod assembly (2), and the input shaft is included with screw rod assembly (2)：First straight pin (21), input shaft (22), twiot arm (23), needle bearing (24), the second straight pin (25), screw shaft (26), steel ball conduit (27), conduit pressing plate (28), steering nut (29).This utility model provides a kind of high intensity, the driven steering device of high reliability.

Description

A kind of electric direction varying device input shaft and screw rod assembly and its device
Technical field
This utility model belongs to Mechatronic Systems and road vehicle application field, and in particular to a kind of heavy circulating ball type bimodulus electricity Dynamic power steering gear.
Background technology
From the point of view of automobile industry situation, with the continuous growth of fuel combustion vehicle quantity, vehicle discharges the pollution to environment and gets over Come more serious, while oil is also faced with the crisis of exhaustion as the non-renewable energy, therefore 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 which, into For the core development topic of current wheeled vehicle technology.Electric motor driven power steering technology (EPS) due to its integrated level height, energy-conservation, exempt from dimension At home and abroad be used widely by home vehicle field for the significant advantages such as shield, but be used for turning to the home vehicle of load≤2t or take advantage of With car, and it is applied to the large-tonnage electric motor driven power steering technology of electric motor coach, heavy truck, special vehicle etc. 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 as its single-axle load is big, complicated (such as the 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 to be met high maneuverability demand when highway march is fought, and met on extreme harshness road again There is under condition preferable riding stability and cross-country safety.Wherein, wheeled vehicle steering is then to affect wheeled vehicle The most direct factor of control stability and driving safety, its own performance decide the globality of wheeled vehicle chassis system Energy.At present, China's wheel military vehicle steering adopts hydraulic power-assist steering system substantially, and actuator is circulating ball type liquid Pressure power-assisted steering device, so, Vehicular turn is returned 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 affect vehicle maneuverability；And for example, Can there is the sensation of steering " unstable " in vehicle, i.e. power steering is excessive when running at high speed, and this is by circulating ball type hydraulic booster What the principle of steering gear was determined, in hydraulic power-assist steering system, steering pump provides power by electromotor, engine speed during high speed Lifting, hydraulic booster system pressure rise, and power steering increases naturally, although steering pump new at present can be accomplished at a high speed Oil pump flow pressure release during steering declines, but can not solve the problems, such as " unstable " 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., take turns Formula vehicle is developed rapidly to digitized, complete electrochemical, unmanned, intelligentized direction, and Conventional drum wheel steering system Tomorrow requirement, intelligent steering system, active front steering system, wire-controlled steering system etc. can not be met 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 version, it is big absolutely Most 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 has high demands, and master-plan difficulty is big.As 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 cannot be met using pinion-and-rack steering device or steering tube pillar transfer, it is necessary to adopt 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 turns To in device, have 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, twists in non-paved road or mud more and use under cross-country road, and vehicle turns Sizable shock loading will be born to system, and these shock loadings will have a sizable part to need power steering gear to hold Receive, therefore, in power steering gear, housing, the intensity of drive disk assembly determine the reliability and security of steering.Just follow For global formula hydraulic power steering gear, the part such as its screw rod, sector shaft, housing, steering nut is often as 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, 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 addition, the part such as steering nut, steel ball conduit pressing plate in input shaft and screw device is that stress is most in device again For serious part, such as, steel ball conduit pressing plate is to ensure circulating steel ball smooth circulation inside circulating ball type electric steering device Critical component, once steel ball deformation of guide tube or rupture will result directly in circulating ball type electric steering device circulating steel ball damage, move Power driving-chain fails, serious, will cause the parts damages such as housing, steering nut, so as to cause what is cannot repaired to steering gear Injury；Steering nut not only needs the joggled strength of guarantee and sector shaft, also needs to ensure that circulating steel ball rolling is smooth inside which, Uniform force etc..
Recirculating ball-type steering structure frequently occurs steel ball rupture, screw rod fracture, steel ball in conventional application process, relatively Situations such as deformation of guide tube dislocation, cover plate come off or rupture, causes grievous injury in itself, therefore develops a kind of high to steering gear Intensity, the input shaft of high reliability and screw device are the keys for lifting circulating ball type electric steering device overall performance and reliability Approach.
For the problems referred to above, this utility model provides a kind of new input shaft and screw device and its transfer, from And the various problems that the steering for solving heavy vehicle faces.
Utility model content
The technical problems to be solved in the utility model is：How a kind of heavy circulating ball type bimodulus electric motor driven power steering is provided Device.
To achieve these goals, the technical solution of the utility model is as follows：
A kind of electric direction varying device input shaft and screw rod assembly, the input shaft are included with screw rod assembly：It is first straight pin, defeated Enter axle, twiot arm, needle bearing, the second straight pin, screw shaft, steel ball conduit, conduit pressing plate, steering nut, the screw rod Axle one end axially arranges reducing inner chamber body, and described screw shaft one end is machined with through hole, and the through hole is connected with inner chamber body, institute One end insertion inner chamber body of twiot arm is stated, second straight pin inserts through hole, so as to one end and the spiral shell of locking elastic torsion bar The coaxial relative rotation of bar axle；The needle bearing 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, and the second end of the input shaft arranges through hole, and the through hole is connected with cavity structure, institute State in the cavity structure of other end insertion input shaft of twiot arm, first straight pin inserts through hole, so as to locking elastic The relative rotation of the torsion bar other end and input shaft；The first end of the input shaft is against needle bearing；The screw shaft it is another End arranges steering nut, and the steering nut upper surface is machined with many places steel ball hand-hole, after injection steel ball, on steering nut Portion is installed by the conduit pressing plate of steel ball conduit and stationary balls conduit.
Preferably, the screw shaft main body is many reducing column structures, one end processes helicla flute, the other end along outer surface End is machined with reducing inner chamber body axially inward and opens square groove in end.
Preferably, needle bearing is not contacted with twiot arm.
Preferably, input shaft processes inclined-plane with screw shaft connection end.
Preferably, input shaft is slab construction with conduit pressing plate in screw rod assembly.
Preferably, the steering nut is hollow rectangular structure, inwall is processed as helical form, and section is arc-shaped Guide groove.
A kind of driven steering device, including foregoing input shaft and screw rod assembly.
Preferably, the driven steering device, including：Housing assembly, input shaft and screw rod assembly, sector shaft are total Into, support seat assembly, turbine, worm screw, inner cap assembly, corner torque sensor, outer end cap assembly, Flos Mume adapter sleeve assembly, Motor assembly, inside the housing assembly, the cavity of one end open is closed in horizontally disposed one end, and input shaft is total with screw rod Into in the cavity of housing assembly, input shaft is arranged on one end of closing, the input shaft and spiral shell with screw rod assembly one end The other end of bar assembly reaches the outside of the cavity of housing assembly, along vertical with screw rod assembly with input shaft in housing assembly Direction install sector shaft assembly and so that sector shaft assembly engaged by gear with input shaft with screw rod assembly；The support base Assembly is set in outside input shaft and screw rod assembly and for spacing input shaft and screw rod assembly；The worm screw along with input shaft with The vertical direction of screw rod assembly, in housing assembly, Flos Mume adapter sleeve assembly is sequentially coaxially installed in one end of the worm screw With motor assembly；The turbine and worm engaging, the worm drive input shaft are rotated with screw rod assembly；The inner cap assembly It is set on input shaft and screw rod assembly and installed in the outside of turbine, corner torque sensor and axial direction and input shaft and spiral shell Bar assembly connects, and the outer end cap assembly is set on input shaft and screw rod assembly and installed in the outer of corner torque sensor Portion, 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 As datum level non-penetrating end bottom surface A start to process successively the first inner headed face B, secondary transmission chamber C, the first inner threaded surface D, one 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 by non-penetrating bottom surface G successively；
With screw rod assembly one end in the first inner headed face B, the support seat assembly is arranged on first to the input shaft In inner threaded surface D, described turbine is arranged in the E of primary transmission chamber, 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 screw rod assembly with input shaft；The worm screw is arranged on worm screw intracavity, 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 engaged with turbine, by the 4th inner circle in the I of screw rod chamber The ball bearing of face J and the locking nut being spirally connected with the second inner threaded surface K are fixed；Flos Mume adapter sleeve assembly one end connecting screw rod top End, one end connect the output spline of motor assembly；Motor assembly is bolted on the motor flange of housing assembly and installs Face M；Motor torque is passed to input shaft and screw rod assembly by worm and gear, and torque is converted into input with screw rod assembly by input shaft 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 the C of secondary transmission chamber；
Rectangular seal is installed on housing upper screwed hole with plug cock, for after to secondary transmission chamber C injection lubricating oil Sealed oiling mouth；Single thrust bearing is installed on the first inner headed face B of housing 1A；Ball bearing is installed in the C of secondary transmission chamber It is coaxial with sector shaft assembly；Angular contact bearing is installed on the 3rd inner headed face H of primary transmission chamber E.
Preferably, the input shaft is included 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 arranged Reducing inner chamber body, described screw shaft one end are 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 as to the coaxial relative rotation of one end and the screw shaft of locking elastic torsion bar； The needle bearing insertion reducing inner chamber body is interior and is resisted against the sidepiece of inner chamber body；Axially arrange in the middle part of the input shaft empty Cavity configuration, the second end of the input shaft arrange through hole, and the through hole is connected with cavity structure, and the other end of the twiot arm is inserted Enter in the cavity structure of input shaft, first straight pin inserts through hole, so as to 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 setting steering nut of the screw shaft, described turn Many places steel ball hand-hole is machined with to nut upper surface, after injection steel ball, steel ball conduit is installed on steering nut top and is consolidated 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 cone tooth, one end of the axle are 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 arranges sector shaft side cover plate, arranges needle bearing between the sector shaft side cover plate and axle；Along on the axial direction of axle, The side cover plate has certain interval with one end of axle, and the hole run through, described sector shaft adjustment are arranged on the side cover plate Pin extends through the hole on side cover plate from annular groove, and the adjusting nut is enclosed within sector shaft adjusting pin and arranges 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 periphery are machined with external screw thread, and the unilateral thrust angular contact bearing is installed on support base 41 It is internal；After supporting seat assembly to be axially set with input shaft and screw rod assembly, it is fastened in the first of housing assembly by its external screw thread Flank D, realize input shaft and the installation of 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 intracavity, 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, described steering gear the inner cap assembly includes：Inner end cap, outside framework oil seal, corner torque sensor positioning 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 is fixed block rubber and fixes sensor leading-out terminal and be fixed on inner interior surface.
Preferably, the Flos Mume adapter sleeve assembly two ends are internal spline structure, outside its one end internal spline connecting worm Splined end, one end connect the output spline of motor assembly, play shaft coupling；The motor assembly passes through Flos Mume adapter sleeve After assembly is axially installed with worm screw, the motor mounting surface of housing 1A is fixed on by flange connection.
In addition, this device greatly improves the reliability of system by the innovative design to critical component, key position Property, impact property and exploitativeness, are mainly reflected in：
1., in this device case 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 QT450-10 GB1348-2009 and carries out Ageing Treatment, with farthest The performance of material is played, casing rigidity is improved；
3. hull outside adopts round-corner transition, integrally adopts cast form, 2 °～3 ° of pattern draft, improve working (machining) 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 and housing assembly adopt 4 points of connected mode, it is ensured that the assembling intensity of sector shaft assembly, dress The globality put and air-tightness；
7. rubber blanket is increased in sector shaft assembly, when sector shaft face of gear is being grown with steering nut face of gear engagement place Phase, big load occur gap using after, and which can realize flexible compensation automatically within the specific limits；
8. input shaft is machined with steel ball hand-hole at 4 with steering nut upper surface in screw rod assembly, after injection steel ball, can The circulation of two-way steel ball is formed, decomposition steel ball and steering nut inner surface spiral fluted stress is reduced, is effectively improved steering spiral shell Female reliability with circulating steel ball；
9. input shaft and conduit pressing plate in screw rod assembly are monoblock type slab construction so as to being capable of large-area and steering spiral shell Female patch is closed, and has effectively decomposed the stress of steel ball, it is ensured that the smooth rolling of steel ball, greatly reduces steel ball when huge external force is born, It is difficult to the bad probability in roof fall or top, improves the reliability of device.
Compared with prior art, this utility model has the following advantages：
Electric motor driven power steering system (EPS) due to its drive form, realize the aspects such as principle with traditional hydraulic booster system System is compared and is had a clear superiority, and is mainly reflected in：
1st, there is provided a kind of high intensity, the input shaft of high reliability and screw device.
2nd, transfer simple structure, save space.Electric motor driven power steering system eliminates the steering of hydraulic booster system The parts such as pump, fluid pressure line, oil tank, enormously simplify steering system structural, save interior space, and turn wheeled vehicle It is more convenient for flexible arrangement to system.
3rd, transfer energy efficient.Electric motor driven power steering system only just provides power-assisted in Vehicular turn, produces energy Consume, even and if hydraulic power steering system when vehicle is not turned to, system is also operated always, and energy dissipation is serious.
4th, the non-maintaining property of transfer.For hydraulic power-assist steering system, electric motor driven power steering system is not present Seepage, changes the general maintenance sex chromosome mosaicisms such as sealing member, pipeline.
5th, transfer improves vehicle handling stability and safety.Different from the single power-assisted of hydraulic power-assist steering system Characteristic, the assist characteristic of electric motor driven power steering system is controllable factor, can provide optimal power-assisted, subtract under various driving cycles The little disturbance to steering by caused by Uneven road, improves the steering characteristic of vehicle, during mitigation low vehicle speeds Steering force, improves steering stability during high vehicle speeds.
This utility model provides a kind of heavy circulating ball type bimodulus driven steering device, and which is total by steering gear housing Into, input shaft and screw rod assembly, sector shaft assembly, support seat assembly, turbine, worm screw, inner cap assembly, corner torque sensing The parts such as device, outer end cap assembly, Flos Mume adapter sleeve assembly, motor assembly are constituted.This device overall configuration integrated level is very high, Circulating ball is completed in the spatial dimension of existing equal tonnage circulatory spherical hydraulic power-assisted steering gear with tooth fan structure, big retarding ratio The various structures such as turbine and worm structure, corner torque sensor, motor assembly it is integrated, specifically, its input shaft and screw rod Assembly is axially mounted to steering gear housing assembly secondary transmission intracavity, by supporting seat assembly axial limiting and fixation；Turbine wheel shaft To being installed on input shaft and screw rod assembly, positioned at primary transmission intracavity using flat key connected mode；Screw rod is axially mounted to turn It is to device housing assembly worm screw intracavity and at a fully engaged with the steering nut in screw rod assembly with input shaft；Inner cap assembly and input Axle is co-axially mounted and is anchored on inside steering gear housing assembly shell with screw rod assembly；Corner torque sensor assembly need to be with input Axle is co-axially mounted with screw rod assembly, on the outside of inner cap assembly, by the female thread processed in inner end cap in inner cap assembly Hole is fixed；Outer end cap assembly flange is connected to housing assembly housing outer face, same with the input shaft in screw rod assembly with input shaft Axle；Flos Mume adapter sleeve assembly is two ends internal spline structure one end connecting worm external splines end, and one end connects motor assembly output shaft External splines end, completes connection steering gear integrated with motor.Its architectural feature is totally different from the rack-and-pinion of small passenger car The forms such as formula, steering tube pillar efficiently solve the problems, such as overall output torque and system structure, and which has used for reference circulating ball type The structure of hydraulic power steering device, instead of circulating ball type hydraulic power than mechanism and corner torque sensor etc. using big retarding Rotary valve structure in steering gear, in the case where exceptional space is not increased, realizes hydraulic power to turning that intelligent electric is driven Become, compare compared with equal volume circulating ball type hydraulic power steering device, power demand reduces by 300%, and output torque capacity is lifted 5%.
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 steering gear housing is right 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 steering gear housing is right 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 steel ball conduit pressure plate structure figure of input shaft and screw rod assembly.
Figure 18 is the steel ball conduit pressing plate profile of input shaft and screw rod assembly.
Figure 19 is the steering nut profile of input shaft and screw rod assembly.
Figure 20 is the steering nut overlooking structure figure of input shaft and screw rod assembly.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described in detail.
Herein, if no specified otherwise, it is related to formula, "/" represents division, and "×", " * " represent multiplication.
To solve problem of the prior art, this utility model provides a kind of heavy circulating ball type bimodulus electric motor driven power steering dress Put, as shown in Figure 1-Figure 3, it is characterised in which 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, Flos Mume adapter sleeve assembly 10th, motor assembly 11；
Inside the housing assembly, the cavity of one end open, input shaft and screw rod assembly are closed in horizontally disposed one end 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 2 one end of screw rod assembly The other end of bar assembly 2 reaches the outside of the cavity of housing assembly, in 1 interior edge of housing assembly and input shaft and screw rod assembly 2 Sector shaft assembly 3 is installed and sector shaft assembly 3 is engaged by gear with input shaft with screw rod assembly 2 in vertical direction；Institute State support seat assembly 4 to be set in outside input shaft and 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, Flos Mume adapter sleeve assembly 10 is sequentially coaxially installed with electricity 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 rotate 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 on input shaft and screw rod assembly 2 and turns installed in corner 1 front end of housing assembly is simultaneously fixed in the outside of square sensor 8.
The non-penetrating formula cavity is the cavity of one end open one end closing.
This utility model provides a kind of driven steering device of the heavy vehicle of Novel structure, this device totality structure Type integrated level is very high, and tooth fan knot is completed in the spatial dimension of existing equal tonnage circulatory spherical hydraulic power-assisted steering gear Structure, big retarding are more integrated than the various structures such as turbine and worm structure, corner torque sensor, motor assembly, therefore eliminate liquid The parts such as the pressure steering pump of force aid system, fluid pressure line, oil tank, enormously simplify steering system structural, save interior space, And make wheeled vehicle steering be more convenient for flexible arrangement.
Preferably, described heavy vehicle preferably loads the vehicle more than more than 5 tons.
Preferably, the housing assembly 1 is the pith of device, it is more than one that its body interior is horizontally disposed Become the non-penetrating formula complicated cavity of internal diameter, as shown in figure 4, processing the by the non-penetrating end bottom surface A as datum level successively 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 vertical Direction is also machined with the non-penetrating formula cavity of a changeable internal diameter, as shown in figure 5, being machined with by non-penetrating bottom surface G successively 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. 6,1 outside bottom surface of housing assembly is machined with many places, and female thread installing hole at 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 is processed just like Fig. 8 institutes The outer end cap flange mounting surface N for showing.
Input shaft is axially mounted in housing assembly 1 with screw rod assembly 2, by supporting 4 axial limiting of seat assembly and fixing, Seat assembly 4 is supported to be 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 the E of primary transmission chamber；Inner cap assembly 7 is by friction tight 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 screw rod assembly 2 with input shaft； Outer end cap assembly 9 is bolted, and is installed on the outer end cap flange mounting surface N of housing assembly 1, 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 the steering nut in screw rod assembly 2 with input shaft 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 the I of screw rod chamber, with Turbine 6 is engaged, and the locking nut being spirally connected by the ball bearing of the 4th inner headed face J and with the second inner threaded surface K is fixed；Flos Mume connects Female connector assembly 10 is the output spline of both sides internal spline structure, axial connecting screw rod top and motor assembly 11；Motor assembly The 11 motor flange mounting surface M for being bolted on housing assembly 1；Motor torque is passed to by this device by worm and gear Torque is converted into input axle assembly with screw rod assembly 2 and is exported by sector shaft assembly 3 by input shaft and screw rod assembly 2, input shaft Torque.
Housing assembly of this utility model by above-mentioned special internal structure, is capable of all portions of integrated steering device Part, in the case where exceptional space is not increased, realizes the driven steering device of heavy vehicle.
Preferably, in this device case 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 QT450-10 GB1348-2009 and carries out Ageing Treatment, with most Big degree ground plays the performance of material, improves casing rigidity.
Preferably, hull outside adopts round-corner transition, cast form, 2 °～3 ° of pattern draft is integrally adopted to improve and add 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.
By 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 3 outfan of closing sector shaft assembly and housing bottom surface, it is ensured that lubricating oil is not from tooth Fan output shaft end is revealed；
Rectangular seal 13 is installed on housing upper screwed hole with plug cock 14, for lubricating to secondary transmission chamber C injections Sealed oiling mouth after oil；15 periphery tight fit of single thrust bearing is installed on the first inner headed face B of housing 1A, and axially with it is non- Insertion bottom surface A is brought into close contact, and installs 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 the axiality for ensureing sector shaft assembly 3 and housing 1A And reduce the rotary resistance of sector shaft assembly 3；Angular contact bearing 17 is installed in the E of primary transmission chamber, 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 of worm screw 6, spacing and ensure its turn It is dynamic smooth.
As shown in Figure 10, the input shaft is included 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 arrange reducing inner chamber body, and described screw shaft (26) one end is machined with logical Hole, processes through hole preferably along perpendicular to axial direction；The through hole is connected with inner chamber body, one end of the twiot arm (23) Insertion inner chamber body, second straight pin (25) insert through hole, so as to one end and the screw shaft (26) of locking elastic torsion bar (23) 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 (22) second end of the input shaft arranges through hole, and the through hole is tied with cavity 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 as to locking elastic torsion bar (23) other end and the relative rotation of input shaft (22)；The first end of the input shaft against Needle bearing (24)；The other end of the screw shaft (26) arranges steering nut, and the steering nut upper surface is machined with many places Steel ball hand-hole, after injection steel ball, installs leading for steel ball conduit (27) and stationary balls conduit (27) on steering nut top Pipe pressing plate (28).
Preferably, screw shaft (26) main body is many reducing column structures, one end is processed as high bright and clean along outer surface Degree helicla flute, other end end is machined with reducing inner chamber body axially inward and opens square groove, reducing inner chamber body in end Bottom is vertically machined with through hole, loads twiot arm (23) one end vertically, is become by the second straight pin (25) insertion 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 limits 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, inwardly processes along end face For hexagon boss, hypotenuse is respectively ± 5 degree with horizontal direction angle, after stretching into twiot arm (23) other end vertically, First straight pin (21) is tightly fitted in into through hole, is turned so as to 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 for forming just ± 5 degree with screw shaft (26) side row groove, and its actual effect is to be formed The mechanical position limitation that input shaft (22) and screw shaft (26) are relatively rotated, effectively prevent assembling, twiot arm during 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.
Steering nut (29) is installed vertically from screw shaft (26) other end, Surface Machining has many places steel ball injection thereon Hole, after injection steel ball, installs steel ball conduit (27), its role is to guarantee, when screw shaft (26) rotates, to be squeezed by helicla flute Extrude the internal steel ball of steering nut (29) and another steel ball hand-hole can be smoothly entered from a steel ball hand-hole, again return to Steering nut (29) is internal, and steel ball conduit (27) itself is not possessed fixing device, needs to be fixed by conduit pressing plate (28), After conduit pressing plate (28) is fastened on steering nut (29) upper surface, its actual effect not only secures steel ball conduit (27), and energy It is enough effectively to decompose steel ball conduit (27) stress.29 upper surface of steering nut is machined with many places steel ball hand-hole, at preferably 4, note After entering steel ball, steel ball conduit 27 and conduit pressing plate 28 are installed, it is ensured that when screw shaft 26 rotates, steel ball can screw shaft 26, The closed channel interior circulation that steering nut 29, steel ball conduit 27, conduit pressing plate 28 are formed is rolled, the tooth fan side processing of sector shaft There is involute cone tooth at 3, cone tooth is engaged with sector shaft 31, and the horizontal movement of steering nut 29 is converted to turning for sector shaft 31 It is dynamic；Input shaft 22 processes inclined-plane with 26 connection end of screw shaft, it is ensured that can ensure that low-angle between input shaft 22 and screw shaft 26 Scope is relatively rotated.
Preferably, input shaft is monoblock type slab construction with conduit pressing plate in screw rod assembly so as to can be large-area Fit with steering nut, effectively decomposed the stress of steel ball, it is ensured that the smooth rolling of steel ball, greatly reduce steel ball and bearing huge During external force, it is difficult to the bad probability in roof fall or top, improves the reliability of device.
Input shaft is machined with steel ball hand-hole at 4 with steering nut upper surface in screw rod assembly, after injection steel ball, being capable of shape Circulate into two-way steel ball, reduce decomposition steel ball and steering nut inner surface spiral fluted stress, effectively improve steering nut With the reliability of circulating steel ball.
Such as Figure 17-20, the conduit pressing plate is monoblock type slab construction, and conduit pressing plate top surface processes 3 in the horizontal direction Through hole, for A/C pressing plate and steering nut；Mid portion is machined with tube wall type structure parallel at two, its with lead Combine together between pipe pressing plate, transitions smooth, as conduit pressing plate large-area can be fitted with steering nut, is effectively decomposed The stress of steel ball, so which can guarantee that the smooth rolling of steel ball, can guarantee that steel ball again when huge external force is born, it is difficult to push up Fall or push up bad conduit pressing plate.
The steering nut is hollow rectangular structure, and inwall is processed as helical form, guide groove of the section for arc-shaped, The effect of guide groove is to ensure that firm ball can be rolled in Infinite Cyclic in the closing space formed with conduit pressing plate by which；Turn Through hole at 4 is machined with to the top surface of nut, per being located at 2 in same helix guide groove, coordinates conduit pressure per through hole at two Structural pipe wall on plate defines the steel ball that will can start to roll from front end, rolls to steering nut end, by conduit Pressing plate is recycled to front end, from new rolling；Steering nut bottom surface is machined with outer serration for engaging with sector shaft.
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) Fan including tooth and axle, tooth fan is machined with the sector gear structure that involute bores tooth, 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 One end that sector shaft adjusting pin has certain interval, the axle arranges sector shaft side cover plate, the sector shaft side cover plate and axle Between arrange needle bearing (36)；Along on the axial direction of axle, the side cover plate has certain interval, institute with one end of axle State and the hole run through be set on side cover plate, described sector shaft adjusting pin (33) extends through the hole on side cover plate from annular groove, The adjusting nut (34) is enclosed within sector shaft adjusting pin (33) and arranges 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, preferably involute cone Tooth, which must be engaged with 29 side of steering nut cone tooth, and the axial bottom end face of the axle of sector shaft is machined with tiny middle position groove, its Main Function is rotation is more convenient for identification and is measured, and annular groove bottom centre position is machined with internal thread hole, for pacifying Toothing is fanned axial adjustment pin 33 and sector shaft adjusting pin 33 is fixed on ring by installing sector shaft plug screw 35 in inner headed face riveting Connected in star bottom；32 end face center position of the sector shaft side cover plate is machined with internal thread through hole, its role is to so that tooth fan 33 top of axial adjustment pin 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, sector shaft assembly 3 is fixed on upper end cover flange mounting surface L；The sector shaft adjustment 33 top of pin is processed as external thread structure, is easy to connect adjusting nut, and bottom is processed as smooth, flattened cylindrical structure, centre bit Put and be machined with external screw thread, which can be arranged at the internal thread hole of 31 base circle groove center of sector shaft and pass through sector shaft spiral shell 35 compression bottom of plug is smooth, flattened cylindrical upper surface, so as to realize being connected with the axial direction of sector shaft 31；Sector shaft adjusting nut 34 33 top of sector shaft adjusting pin is threadedly connected to, is brought into close contact with 32 top of sector shaft side cover plate, 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；36 periphery of needle bearing with 32 bottom inner headed face tight fit of sector shaft side cover plate is installed, and inner headed face is installed with 31 top periphery tight fit of sector shaft, its work 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 the end face in groove and tooth Between the end face of fan axial adjustment pin 33, and described adjusting pin 33 compresses rubber blanket 37.
Preferably, described adjusting pin 33 is arranged on the diameter of the end in groove is greater than 33 other positions of adjusting pin Diameter.Preferably, the diameter of end is 1.6-2.2 times of other positions diameter.By the increase of end diameter, Neng Goubao Demonstrate,prove large-area contact, 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 outfan a Surface Machinings have serration, for realizing spline connection, b Surface Machinings with steering mechanism 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) the output terminals A surface serration surface roughness is 1.6.
Rubber blanket (3) is increased in the sector shaft assembly, when sector shaft tooth is fanned and between the cooperation appearance of steering nut tooth bar Automatically compensation is realized after gap within the specific limits can.
The sector shaft side cover plate (7) 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 has been improved.
Sector shaft side cover plate adopts 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 increased rubber blanket, when sector shaft face of gear and steering nut face of gear engagement place it is long-term, Big load occurs gap using after, and which can realize flexible compensation automatically within the specific limits.
Rubber blanket is arranged on into the endoporus bottom position at sector shaft side cover end, sector shaft adjusting pin is sequentially loaded into, is fanned 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 installed by riveting after sector shaft plug screw is screwed into place in 2mm, Sector shaft plug screw is compressed, the annular boss of preferred compressed sector shaft plug screw, by sector shaft side cover plate screwed hole of centre, will be pressed into The side cover of needle bearing screws in sector shaft adjusting pin, sector shaft adjusting pin is spirally connected and is passed through sector shaft side cover plate, passes through Adjustment sector shaft adjusting nut realizes axial locking with unblock sector shaft, sector shaft adjusting pin, the position of sector shaft plug screw.
Adjustment operation principle of the present utility model is as follows：
The gap between tooth fan on tooth bar and sector shaft on steering nut is by adjusting sector shaft adjusting pin protecting 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, the tooth bar 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 for now being compressed makes sector shaft to the left automatically It is mobile, the fit clearance between tooth fan and tooth bar is compensate for automatically, 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 To become the insertion loop configuration of internal diameter, exterior periphery is machined with external screw thread, 42 close-fitting of unilateral thrust angular contact bearing to seat 41 Conjunction is installed on inside support base 41；After supporting seat assembly 4 to be axially set with input shaft and screw rod assembly 2, fastened by its external screw thread In the first inner threaded surface D of housing assembly 1, realize input shaft and the installation of screw rod assembly 2 with it is spacing.
As shown in figure 13,5 internal diameter disc of the turbine is machined with keyway, its role is to by flat key connected mode axial direction Input shaft and 2 axle of screw rod assembly 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.
5 internal diameter disc of the turbine 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 screw rod assembly 2 with input shaft；Emphasize Point out, the end face of the turbine 5 is machined with female thread adjusting hole 63 at 2, and its actual effect is, in assembling process, only By special tooling or instrument being used at female thread adjusting hole 63, can just be accurately positioned or finely tune the position of turbine 5 and worm screw 6 Spend and engage situation, so as to ensure the realizability and adjustable of driving-chain.
As shown in figure 14,6 upper end of the screw rod 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, install with 17 inner headed face tight fit of angular contact bearing, top suit is machined with externally threaded hollow Locking plug screw, is fastened on the second inner threaded surface K.
As shown in figure 15, described steering gear the inner cap assembly 7 includes：Inner end cap 71, outside framework oil seal 72, corner torque sensing Device location-plate 73, sensor fixes block rubber 74；71 inner surface of the inner end cap 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 71 diameter bore of inner end cap are limited in reducing end face, its effect It is to prevent 1 internal lubrication oil of housing assembly from leaking, damages corner torque sensor 8；The corner torque sensor location-plate 73 are bolted mode is fixed on 71 inner surface tapped blind hole of inner end cap, its role is to avoid corner torque sensor 8 There is angle skew vertically in outer ring；The sensor is fixed block rubber 74 and its role is to fix sensor leading-out terminal and avoid Foreign body is entered 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 Lid 91 its outer surface is machined with through hole, and effect is can be bolted mode to be fixed on outer end cap flange mounting surface N, its Inner surface is processed into reducing communicating structure axially outward, is machined with inner headed face I and circular groove II, deep groove ball bearing 93 successively Be installed in inner headed face I, its object is to guarantee that the rotation of input shaft 22 is smooth and housing 1A is installed in outer end cap assembly 9 Afterwards, input shaft and screw rod assembly 2 and primary transmission chamber E, the axiality of secondary transmission chamber C 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 cannot meet requirement.
10 two ends of Flos Mume adapter sleeve assembly are processed as internal spline structure, the outer flower of its one end internal spline connecting worm 6 Key end, one end connect the output spline of motor assembly 11, make between motor assembly 11 and worm screw 6 as 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 female thread mounting flange, which is the power source of this device, by prunus mume (sieb.) sieb.et zucc. After flower adapter sleeve assembly 10 is finished with worm screw 6 is axially mounted, the mode being bolted is fixed on motor flange mounting surface M.
Heavy circulating ball type bimodulus driven steering device of the present utility model and circulatory spherical hydraulic power-assisted steering gear Structure difference is that heavy circulating ball type bimodulus driven steering device adopts worm gear structure and corner torque to pass Sensor structure, instead of the hydraulic reversing valve structure of circulatory spherical hydraulic power-assisted steering gear；Direct current generator is adopted for power-assisted power source, Instead of hydraulic steering pump power source；Involved heavy circulating ball type bimodulus driven steering device compact overall structure, Integrated level is higher, greatly reduces the number of components of power steering system, and has reached the purpose of active control power steering.
By the heavy circulating ball type bimodulus electric motor driven power steering dress shown in Fig. 1 to Figure 16, involved by this utility model patent The feature for putting operation 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 exists certain angle, preferably ± 10 degree of angular displacement idle stroke, so, screw shaft 26 is existed with input shaft 22 When reaching angular displacement null way limit, can rotate coaxially with input shaft 22,8 axial direction of corner torque sensor and input shaft 22nd, screw shaft 26 connects, and control system calculates motor assembly 11 by the output torque value of collection corner torque sensor 8 Target torque, with torque control model motor assembly 11 export power torque, motor assembly 11 pass through Flos Mume adapter sleeve Assembly 10, transmits torque to worm screw 6, is applied to torque on screw shaft 26 and drive screw after worm gear 5 slows down and increases torsion Axle 26 is rotated, now, in input shaft and screw rod assembly 2 steel ball can follow 26 screw rod helical pitch of screw shaft and inside steering nut 29 Roll, steering nut 29 is directed to rolling steel balls in steel ball conduit 27 by upper surface perforate, and steel ball is through steel ball conduit 27 Guiding is returned to inside steering nut 29 again；The steel ball that 29 inner loop of steering nut is rolled provides horizontal direction and laterally pushes away Power, promotes steering nut 29 to move horizontally, and as steering nut 29 is engaged with sector shaft 31, sector shaft assembly 3 will turn to spiral shell Female 29 thrust is converted into torque with linear motion stroke and is exported with angular displacement.
When stopping is rotationally movable thereby input shaft 22, as 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, novelty introduce intelligent power-assisted characteristic function with turn to active safety characterisitic function, tool For body, intelligent power-assisted function is the steering resistance resolved according to vehicle speed condition, steering wheel angle situation in transient state time domain scale Force motor transient state target torque value, its basic skills are 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 minimum hand-power Fmin(N) it is system design setting value, preferably 20N；
Driver maximum hand-power Fmax(N) it is system design setting value, preferably 50N；
Electric direction varying device primary transmission compares im(constant) is the gear ratio of default value, i.e. worm gear and worm screw, preferably 25-35, more preferably 30；
Electric direction varying device secondary transmission compares in(constant) is the gear ratio of default value, i.e. screw shaft and sector shaft, excellent Elect 21-31 as, more preferably 26.13；
Steering gear forward efficiency ηm(0～1) is default value, preferably 0.6；
Steering wheel angle θsw(t)(rad) it is sensor acquisition value, the unit interval, steering wheel rotational angle in preferred 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 acquisition value, preferred scope is 0～120；
Propons foreign steamer rotational angle theta0'(t)(rad), preferred scope is -0.54～0.54；
Wheel steering locking angle θ0(rad) to design input value, preferred absolute value is 0.61；
Steering wheel radius R0M () is default value, preferably 0.21.
In addition, its key property for turning to active safety characterisitic function is that status information when being travelled according to vehicle is (such as car Speed, turning radius, road surface inclination angle etc.) and vehicle structure feature (such as wheelspan, wheelbase, weight etc.), under different travel speeds, move State anticipation simultaneously parses the maximum angle α for assuming that steering wheel is allowed under critical state of the vehicle in there is rollover or sideslip0； When pilot control vehicle exceedes this maximum angle time, motor is reversely increased rapidly system steering drag, prevention side Rotate to disk, rollover or sideslip situation occur 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 road surface angle of inclination with respect to the horizontal plane, is driver Collection value, preferred scope are -30 °～30 °；
Electric direction varying device secondary transmission compares in(constant) is the gear ratio of default value, i.e. screw shaft and sector shaft, excellent Elect 21-31 as, more preferably 26.13；
G is acceleration of gravity, the quadratic power of 9.8 meter per seconds.
The unmanned pattern of two line traffic controls
Control system is by calculating corner torque sensor 8 when front hook value is calculated with the target rotation angle value for receiving The absolute object position of the needs motion of motor assembly 11, is rotated to absolute object with position control mode motor assembly 11 Position；Motor assembly 11 drives worm screw 6 to rotate with worm gear 5 by Flos Mume adapter sleeve assembly 10；Preferably, worm screw 6 and worm gear 5 Between speed reducing ratio be 30.As worm gear 5 is rotated coaxially with screw shaft 26, i.e., rotational angular velocity and rotational angle are identical, now, defeated Enter steel ball in axle and screw rod assembly 2 can follow 26 screw rod helical pitch of screw shaft and in 29 roll inside of steering nut, steering nut 29 Rolling steel balls are directed in steel ball conduit 27 by upper surface perforate, steel ball is oriented to through steel ball conduit 27 and turns To the inside of nut 29；The steel ball that 29 inner loop of steering nut is rolled provides horizontal direction lateral thrust, promotes steering nut 29 Move horizontally, as steering nut 29 is engaged with sector shaft 31, the thrust of steering nut 29 is transported by sector shaft assembly 3 with straight line Dynamic stroke is converted into torque and is exported with angular displacement.
In the controls, the wheel target rotation angle algorithm proposed based on the intervention of Vehicular yaw angular motion state of novelty, Specifically：First, by parameter calculations such as steering wheel angle, electric direction varying device secondary transmission ratio, steering gear connection angular gear ratios Outgoing direction disk target rotation angle and the functional relationship at wheel target deflection angle, i.e.,：
Second, in vehicle traveling 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 Cause vehicle that the danger breakked away or turn on one's side occurs, 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., when 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) replace steering wheel target rotation angle θp；Steering wheel angle threshold value θp(S) turn with steering wheel target Angle θpRatio be more than or equal to 1 when, maintain steering wheel target rotation angle θp, so as to realize that the dynamic to wheel target rotation angle is intervened. θ is obtained by formula below whereinp(S)：
Wherein:
The various middle parameter such as following table of the above:
Although this utility model is disclosed as above with preferred embodiment, this utility model is not limited to this.Any Art personnel, in without departing from spirit and scope of the present utility model, can make various changes or modifications, therefore this practicality New protection domain should be defined by claim limited range.

Claims (9)

1. a kind of electric direction varying device input shaft and screw rod assembly (2), the input shaft are included with screw rod assembly (2)：First cylinder Pin (21), input shaft (22), twiot arm (23), needle bearing (24), the second straight pin (25), screw shaft (26), steel ball are led Pipe (27), conduit pressing plate (28), steering nut (29), described screw shaft (26) one end axially arranges reducing inner chamber body, institute State screw shaft (26) one end and be machined with through hole, the through hole is connected with inner chamber body, in one end insertion of the twiot arm (23) Cavity, second straight pin (25) insert through hole, so as to one end of locking elastic torsion bar (23) is coaxial with screw shaft (26) Relatively rotate；Needle bearing (24) the insertion reducing inner chamber body is interior and is resisted against the sidepiece of inner chamber body；The input shaft (22) Middle part axially arranges cavity structure, and (22) second end of the input shaft arranges through hole, and the through hole is connected with cavity structure, In the cavity structure of the other end insertion input shaft of the twiot arm (23), first straight pin (21) inserts through hole, from And the relative rotation of locking elastic torsion bar (23) other end and input shaft (22)；The first end of the input shaft is against needle bearing (24)；The other end of the screw shaft (26) arranges steering nut, and the steering nut upper surface is machined with many places steel ball injection Hole, after injection steel ball, installs the conduit pressing plate of steel ball conduit (27) and stationary balls conduit (27) on steering nut top (28)。
2. input shaft as claimed in claim 1 and screw rod assembly, it is characterised in that screw shaft (26) main body is many reducings Column structure, one end process helicla flute along outer surface, and other end end is machined with reducing inner chamber body axially inward and at end Square groove is opened at face.
3. input shaft as claimed in claim 1 and screw rod assembly, it is characterised in that needle bearing (24) not with twiot arm (23) contact.
4. input shaft as claimed in claim 1 and screw rod assembly, it is characterised in that input shaft is oblique with the processing of screw shaft connection end Face.
5. input shaft as claimed in claim 1 and screw rod assembly, it is characterised in that input shaft and conduit pressing plate in screw rod assembly For slab construction.
6. input shaft as claimed in claim 1 and screw rod assembly, it is characterised in that the steering nut is hollow cuboid knot Structure, inwall are processed as helical form, guide groove of the section for arc-shaped.
7. the input shaft described in a kind of one of driven steering device, including claim 1-6 and screw rod assembly.
8. driven steering device as claimed in claim 7, it is characterised in that also include：Housing assembly (1), 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), Flos Mume adapter sleeve assembly (10), motor assembly (11), a horizontally disposed end seal inside the housing assembly Close the cavity of one end open, input shaft with screw rod assembly (2) in the cavity of housing assembly, input shaft and screw rod assembly (2) one end is arranged on one end of closing, and the other end of the input shaft and screw rod assembly (2) reaches the cavity of housing assembly Outside, in housing assembly (1) installs sector shaft assembly (3) along the direction vertical with screw rod assembly (2) with input shaft and causes Sector shaft assembly (3) is engaged by gear with input shaft with screw rod assembly (2)；Support seat assembly (4) is set in input shaft With screw rod assembly (2) outside and for spacing input shaft and screw rod assembly (2)；The worm screw (6) is along total with screw rod with input shaft Into the direction that (2) are vertical, in housing assembly (1), it is total that Flos Mume adapter sleeve is sequentially coaxially installed in one end of the worm screw (6) Into (10) and motor assembly (11)；The turbine (5) and worm engaging, the worm screw (6) drive input shaft and screw rod assembly (2) Rotate；The inner cap assembly (7) is set on input shaft and screw rod assembly (2) and is arranged on the outside of turbine (5), corner Torque sensor (8) is connected with input shaft with screw rod assembly (2) with axially, the outer end cap assembly (9) be set in input shaft and On screw rod assembly (2) and installed in the outside of corner torque sensor (8), and it is fixed on housing assembly (1) front end.
9. transfer as claimed in claim 8, it is characterised in that the housing assembly (1) is internal horizontally disposed For the non-penetrating formula cavity of a changeable internal diameter, the first inner circle is processed successively by the non-penetrating end bottom surface (A) as datum level 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 edge Vertical direction is also machined with the non-penetrating formula cavity of a changeable internal diameter, by non-penetrating bottom surface (G) is machined with the 3rd successively Inner headed face (H), worm screw chamber (I), the 4th inner headed face (J), the second inner threaded surface (K)；
The input shaft is arranged in the first inner headed face (B) with screw rod assembly (2) one end, and support seat assembly (4) is arranged on In first inner threaded surface (D), described turbine (5) is arranged in primary transmission chamber (E), and inner cap assembly (7) press-fits in housing Second inner headed face (F) of assembly (1), is limited in the round boss formed between the second inner headed face (F) and primary transmission chamber (E)； Corner torque sensor (8) is fixed on the outside of inner cap assembly (7), coaxial with screw rod assembly (2) with input shaft；The worm screw Worm screw intracavity is arranged on, described worm screw one end is arranged in the 3rd inner headed face (H)；Outer end cap assembly (9) is installed on housing assembly (1) outer end cap flange mounting surface (N), it is coaxial with screw rod assembly (2) with input shaft；Sector shaft assembly (3) is installed on two grades of biographies Dynamic chamber (C)；Worm screw (7) is engaged with turbine (6) in screw rod chamber (I), by the ball bearing of the 4th inner headed face (J) and The locking nut being spirally connected with the second inner threaded surface (K) is fixed；Flos Mume adapter sleeve assembly (10) one end connecting screw rod top, one end connect Connect the output spline of motor assembly (11)；Motor assembly (11) is bolted on the motor flange peace of housing assembly (1) Dress face (M)；Motor torque is passed to input shaft and screw rod assembly (2) by worm and gear, and input shaft and screw rod assembly (2) are by torque It is converted into input axle assembly and passes through sector shaft assembly (3) output torque.
CN201621107112.8U 2016-10-09 2016-10-09 A kind of electric direction varying device input shaft and screw rod assembly and its device Expired - Fee Related CN206067867U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621107112.8U CN206067867U (en) 2016-10-09 2016-10-09 A kind of electric direction varying device input shaft and screw rod assembly and its device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621107112.8U CN206067867U (en) 2016-10-09 2016-10-09 A kind of electric direction varying device input shaft and screw rod assembly and its device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107914762A (en) * 2016-10-09 2018-04-17 中国北方车辆研究所 A kind of electric direction varying device input shaft and screw rod assembly and its device
CN112572603A (en) * 2020-12-29 2021-03-30 坤泰车辆***（常州）有限公司 Electric power steering gear for automobile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107914762A (en) * 2016-10-09 2018-04-17 中国北方车辆研究所 A kind of electric direction varying device input shaft and screw rod assembly and its device
CN112572603A (en) * 2020-12-29 2021-03-30 坤泰车辆***（常州）有限公司 Electric power steering gear for automobile
CN112572603B (en) * 2020-12-29 2022-03-18 坤泰车辆***（常州）有限公司 Electric power steering gear for automobile

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Termination date: 20171009