CN204110139U - Four-wheel steering assembly - Google Patents
Four-wheel steering assembly Download PDFInfo
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- CN204110139U CN204110139U CN201420552404.7U CN201420552404U CN204110139U CN 204110139 U CN204110139 U CN 204110139U CN 201420552404 U CN201420552404 U CN 201420552404U CN 204110139 U CN204110139 U CN 204110139U
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- tierod
- steering
- track arm
- wheel
- ball pivot
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Abstract
The utility model provides a kind of four-wheel steering assembly, comprising: foresteerage gear, comprising: the first steering gear be connected with bearing circle; First steering rack; Be fixed in the middleware of the first steering rack midway location; The left front tierod that length is all variable and right front tierod, and both one end are all connected with middleware, the other end is connected with right front track arm with left front track arm respectively; Rear-axle steering mechanism, comprising: rear steering device; The left back tierod that length is all variable and right back tierod, and both one end are all connected with rear steering device, the other end is connected with right back track arm with left back track arm respectively.Four-wheel steering assembly of the present utility model, have employed adjustable length tierod, significantly reducing under the prerequisite required steering control system, ensure that turning efficiency during normal vehicle operation, can realize when parking in-situ transesterification to, simplify the process of parking.
Description
Technical field
The utility model relates to electric automobile chassis technical field, specifically refers to a kind of four-wheel steering assembly.
Background technology
The process of parking of existing four-wheel automobile is a complicated Kinematic process, relies on the observation of chaufeur and experience carefully car to be stopped in narrow space.Partial automobile is also equipped with parking assisting system successively, alleviates chaufeur burden.But be limited to the steering hardware of existing automobile, automated parking system just alleviates the operation burden of chaufeur, not simplification is not parked process, and automatic parking process is still more complicated.
Electronlmobil brings the possibility simplifying process of parking.The wheel assembly with integration that Chinese patent CN201484168U provides a kind of individual drive, turns to, hangs and brake, four steer motor are adopted to drive the turned to ball pivot of the Top Crossbeam of double wishbone suspension to realize four-wheel independent steering by transmission shaft, speed reduction gearing, wheel steering locking angle is close to 90 °, can realize walking crosswise, in-situ transesterification to isotype, enormously simplify the process of parking.
But, line passes independent steering assembly and inevitably proposes high requirement to steering control system, except obvious high reliability request, kinematics and the dynam cooperation control of left and right sides wheel also require high, and this to be normal vehicle operation must ensure.Although published technical scheme shows the performance of various uniqueness, the height of its technical risk is significant also, is therefore difficult to drop into actual use.
Utility model content
The purpose of this utility model is to overcome above-mentioned shortcoming of the prior art, a kind of four-wheel steering assembly being provided, significantly reducing under the prerequisite required steering control system, ensureing turning efficiency during normal vehicle operation, and can realize in-situ transesterification to, simplify and to park process.
The utility model provides a kind of four-wheel steering assembly, comprising: foresteerage gear, and it comprises: the first steering gear be connected with bearing circle; The first steering rack be meshed with described first steering gear; Be fixed in the middleware of described first steering rack midway location; Adjustable length left front tierod, its one end is connected with described middleware, and the other end is connected with left front track arm; Adjustable length right front tierod, its one end is connected with described middleware, and the other end is connected with right front track arm; And rear-axle steering mechanism, it comprises: rear steering device; Adjustable length left back tierod, its one end is connected with the left mouth of described rear steering device, and the other end is connected with left back track arm; Adjustable length right back tierod, its one end is connected with the right mouth of described rear steering device, and the other end is connected with right back track arm.
According to four-wheel steering assembly of the present utility model, one end of described left front tierod is connected with described middleware by ball pivot, and the other end is connected with left front track arm by ball pivot; One end of described right front tierod is connected with described middleware by ball pivot, and the other end is connected with right front track arm by ball pivot; One end of described left back tierod is connected by the left mouth of ball pivot with described rear steering device, and the other end is connected with left back track arm by ball pivot; One end of described right back tierod is connected by the right mouth of ball pivot with described rear steering device, and the other end is connected with right back track arm by ball pivot.
According to four-wheel steering assembly of the present utility model, described left front tierod, described right front tierod, described left back tierod and described right back tierod are electric linear actr or hydraulic linear actr.
According to four-wheel steering assembly of the present utility model, described rear steering device is electric linear actr or hydraulic linear actr.
Accompanying drawing explanation
Fig. 1 is the structural representation of four-wheel steering assembly when tierod is in shortest length state involved by the utility model specific embodiment.
Fig. 2 is the structural representation of four-wheel steering assembly when tierod is in extreme length state involved by the utility model specific embodiment.
Fig. 3 (a) is the process schematic that the four-wheel steering assembly involved by the utility model specific embodiment enters vertical parking stall.
Fig. 3 (b) is the process schematic of the four-wheel steering assembly approaching side involved by the utility model specific embodiment to parking stall.
Fig. 3 (c) is the process schematic that four-wheel steering assembly involved by the utility model specific embodiment enters angle-park position.
In figure: 100 vehicles; 1 bearing circle; 2 first steering gears; 3 first steering racks; 4 middlewares; 5lf, 5rf, 5lr and 5rr are left front tierod, right front tierod, left back tierod and right back tierod respectively; 6lf, 6rf, 6lr and 6rr are left front track arm, right front track arm, left back track arm and right back track arm respectively; 7 rear steering devices; 8lf, 8rf, 8lr and 8rr are the near front wheel, off front wheel, left rear wheel and off hind wheel respectively; O turns to instantaneous.
Detailed description of the invention
In order to more clearly understand technology contents of the present utility model, describe in detail especially exemplified by following examples.Should be understood that embodiment is only for illustration of the utility model, instead of to restriction of the present utility model.
Fig. 1 is the structural representation of four-wheel steering assembly when tierod is in shortest length state involved by the utility model specific embodiment, and Fig. 2 is the structural representation of four-wheel steering assembly when tierod is in extreme length state involved by the utility model specific embodiment.
See figures.1.and.2, four-wheel steering assembly, comprising: foresteerage gear, and it comprises: the first steering gear 2 be connected with bearing circle 1; The first steering rack 3 be meshed with the first steering gear 2; Be fixed in the middleware 4 of the first steering rack 3 midway location; Left front tierod 5lf, its variable-length, one end is connected with middleware 4 by ball pivot, and the other end is connected with left front track arm 6lf by ball pivot; Right front tierod 5rf, its variable-length, one end is connected with middleware 4 by ball pivot, and the other end is connected with right front track arm 6rf by ball pivot; And rear-axle steering mechanism, it comprises: rear steering device 7; Left back tierod 5lr, its variable-length, one end is connected with the left mouth of rear steering device 7 by ball pivot, and the other end is connected with left back track arm 6lr by ball pivot; Right back tierod 5rr, its variable-length, one end is connected with the right mouth of rear steering device 7 by ball pivot, and the other end is connected with right back track arm 6rr by ball pivot.
With reference to shown in Fig. 1, left front tierod 5lf, right front tierod 5rf, left back tierod 5lr and right back tierod 5rr has shortest length state and extreme length state, wherein, when vehicle 100 travels, left front tierod 5lf, right front tierod 5rf, left back tierod 5lr and right back tierod 5rr is locked in shortest length state; And with reference to shown in Fig. 2, park in-situ transesterification to time, bearing circle 1 is ajusted, left front tierod 5lf, right front tierod 5rf, left back tierod 5lr and right back tierod 5rr is operated in extreme length state, the near front wheel 8lf and off front wheel 8rf inwardly turns in interior Eight characters shape simultaneously, and left rear wheel 8lr and off hind wheel 8rr outwards turns in outer Eight characters shape, when the front wheel steering angle of the near front wheel 8lf and off front wheel 8rf is simultaneously
the rear-axle steering angle of left rear wheel 8lr and off hind wheel 8rr is
time, vehicle 100 can around be positioned at wheelbase mid point turn to instantaneous O carry out in-situ transesterification to, wherein, L is wheelbase, B
ffor track front, B
rfor track rear.L is wheelbase, specifically refers to the mid point by adjacent two wheels in vehicle the same side, and perpendicular to longitudinal plane of symmetry of vehicle two vertical lines between distance, briefly, be exactly the distance of automobile front axle center to rear shaft center, B
ffor track front, specifically refer to the distance between two front-wheel line of centerss, B
rfor track rear, specifically refer to the distance between two trailing wheel line of centerss, the line of centers of wheel refers to the straight line at plane place through wheel center and vertical with axletree.
Existing conventional vehicles, such as modal economy car, wheelbase exemplary value is 2600mm, track front exemplary value is 1470mm, track rear exemplary value is 1460mm, and concise and to the point calculating is ignored numerical value and is no more than 20mm scrub radius, and calculating front wheel steering angle is 60.52 °, rear-axle steering angle is 60.68 °, can ensure the midpoint turning to instantaneous O at wheelspan.
In the normal driving process of vehicle 100, foresteerage gear and rear-axle steering mechanism conveniently four-wheel steering assembly carry out action, such as carrying out four-wheel when high speed turn in the same way to improve stability, carrying out that four-wheel is incorgruous to be turned to when low speed to reduce Turning radius.
The rear-axle steering angular region of conventional four-wheel steering assembly is very little, is no more than 5 °, and it is mainly used in ensureing high stability.Therefore, the stroke of the mouth of rear steering device 7 is also less.Consider for the volume reduced shared by steering hardware, do not adopt in rear steering mechanism the middleware 4 in foresteerage gear also can ensure left back tierod 5lr and right back tierod 5rr arrange needed for axial length.
Left front tierod 5lf, right front tierod 5rf, left back tierod 5lr and right back tierod 5rr is electric linear actr or hydraulic linear actr.Rear steering device 7 is electric linear actr or hydraulic linear actr.Wherein, hydraulic linear actr is but is not limited to actuator cylinder, and electric linear actr is but is not limited to electric pushrod.
It should be noted that, the application's specific embodiment does not relate to line and passes independent steering technology when vehicle 100 normally travels, when coming out to road from parking area, namely left front tierod 5lf, right front tierod 5rf, left back tierod 5lr and right back tierod 5rr are locked in shortest length state, do not carry out dynamic conditioning in the process of moving, therefore, significantly reducing under the prerequisite required steering control system, ensure that turning efficiency during normal vehicle operation.
The application's specific embodiment abandons and the requirement walked crosswise of unpractical vehicle, also reduce the requirement to suspension, can not propose too much space arrangement requirement, particularly rear suspension to suspension transverse arm still has polytype to select, and not necessarily have to adopt double wishbone suspension.
The employing of variable-length tierod, also the effect that other is useful is brought, such as, can realize the adjustment of automatic four wheel locating parameter, vehicle 100 reaches on four-wheel position finder, and the toe-in of front wheel measured and the prenex parameter of trailing wheel send to the control system of vehicle 100, the length of tierod is adjusted, obtain desirable positional parameter, and this process can realize full-automation, need not manually adjust.
Fig. 3 is vehicle parking process schematic, and wherein, Fig. 3 (a) is the process schematic entering vertical parking stall; Fig. 3 (b) is the process schematic of approaching side to parking stall; Fig. 3 (c) is the process schematic entering angle-park position.Car is moved to suitable position by chaufeur, namely feel that its wheelbase mid point is (general just at the B post place of vehicle, B post refers to that root between driver door and tail gate extends to the pillar bottom car from roof) midway location on basic its parking stall corresponding time, carry out original position zero turn radius adjustment vehicle heading to moor into parking stall smoothly.Chaufeur can rule of thumb determine wheelbase mid point, also can by visual for wheelbase midpoint, such as on vehicle body, laser indication instrument is installed, wheelbase mid point can be got on the ground and perpendicular to the indicatrix of longitudinal plane of symmetry of vehicle, chaufeur sees the relative position between this indicatrix and parking position, car can be determined to be parked in where, then to carry out original position zero turn radius.
Obviously, if be configured with automated parking system, be then easier to realize this process of parking simplified.If vehicle further provided with remote control parking apparatus, then chaufeur and passenger all can get off suitable position, by key or the whole process of parking of mobile phone remote.Owing to standing in the relative position can checking parking position and vehicle outside car better, therefore whole process of parking can be controlled better.
The four-wheel steering assembly of the utility model specific embodiment, have employed the tierod of variable-length, significantly reducing under the prerequisite required steering control system, ensure that turning efficiency during normal vehicle operation, can realize when parking in-situ transesterification to, simplify the process of parking.
The utility model is not limited to above-described embodiment, but cover carry out when not departing from spirit and scope of the present utility model institute change and revise.These change and amendment should not be considered to depart from spirit and scope of the present utility model, and all amendments that such as it will be apparent to those skilled in the art that all should be included within the scope of the appended claims.
Claims (4)
1. a four-wheel steering assembly, is characterized in that, comprising:
Foresteerage gear, it comprises: the first steering gear be connected with bearing circle; The first steering rack be meshed with described first steering gear; Be fixed in the middleware of described first steering rack midway location; Adjustable length left front tierod, its one end is connected with described middleware, and the other end is connected with left front track arm; Adjustable length right front tierod, its one end is connected with described middleware, and the other end is connected with right front track arm; And
Rear-axle steering mechanism, it comprises: rear steering device; Adjustable length left back tierod, its one end is connected with the left mouth of described rear steering device, and the other end is connected with left back track arm; Adjustable length right back tierod, its one end is connected with the right mouth of described rear steering device, and the other end is connected with right back track arm.
2. four-wheel steering assembly according to claim 1, is characterized in that, one end of described left front tierod is connected with described middleware by ball pivot, and the other end is connected with left front track arm by ball pivot; One end of described right front tierod is connected with described middleware by ball pivot, and the other end is connected with right front track arm by ball pivot; One end of described left back tierod is connected by the left mouth of ball pivot with described rear steering device, and the other end is connected with left back track arm by ball pivot; One end of described right back tierod is connected by the right mouth of ball pivot with described rear steering device, and the other end is connected with right back track arm by ball pivot.
3. four-wheel steering assembly according to claim 1, is characterized in that,
Described left front tierod, described right front tierod, described left back tierod and described right back tierod are electric linear actr or hydraulic linear actr.
4. four-wheel steering assembly according to claim 1, is characterized in that,
Described rear steering device is electric linear actr or hydraulic linear actr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420552404.7U CN204110139U (en) | 2014-09-24 | 2014-09-24 | Four-wheel steering assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420552404.7U CN204110139U (en) | 2014-09-24 | 2014-09-24 | Four-wheel steering assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204110139U true CN204110139U (en) | 2015-01-21 |
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ID=52327483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420552404.7U Active CN204110139U (en) | 2014-09-24 | 2014-09-24 | Four-wheel steering assembly |
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| CN (1) | CN204110139U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106697042A (en) * | 2015-11-17 | 2017-05-24 | 比亚迪股份有限公司 | Vehicle, steering transmission mechanism of vehicle and steering system of vehicle |
| CN107284524A (en) * | 2016-03-30 | 2017-10-24 | 比亚迪股份有限公司 | The steering of vehicle, the steering gear of vehicle and vehicle |
| CN107813867A (en) * | 2016-09-14 | 2018-03-20 | 比亚迪股份有限公司 | Steering and vehicle |
| CN107813866A (en) * | 2016-09-14 | 2018-03-20 | 比亚迪股份有限公司 | Steering and vehicle |
| CN107813868A (en) * | 2016-09-14 | 2018-03-20 | 比亚迪股份有限公司 | Steering and vehicle |
| CN109677221A (en) * | 2019-02-14 | 2019-04-26 | 浙江亚太机电股份有限公司 | Across the virtual stub suspension system of core wheel |
| CN109733475A (en) * | 2019-03-06 | 2019-05-10 | 刘恩托 | A kind of steering system and two wheels automobile |
| CN112389536A (en) * | 2020-12-10 | 2021-02-23 | 福州盛世凌云环保科技有限公司 | Automobile steering transmission mechanism |
-
2014
- 2014-09-24 CN CN201420552404.7U patent/CN204110139U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106697042A (en) * | 2015-11-17 | 2017-05-24 | 比亚迪股份有限公司 | Vehicle, steering transmission mechanism of vehicle and steering system of vehicle |
| CN106697042B (en) * | 2015-11-17 | 2019-04-19 | 比亚迪股份有限公司 | The steering system of vehicle, the steering gear of vehicle and vehicle |
| CN107284524A (en) * | 2016-03-30 | 2017-10-24 | 比亚迪股份有限公司 | The steering of vehicle, the steering gear of vehicle and vehicle |
| CN107284524B (en) * | 2016-03-30 | 2019-11-22 | 比亚迪股份有限公司 | The steering system of vehicle, the steering gear of vehicle and vehicle |
| CN107813867A (en) * | 2016-09-14 | 2018-03-20 | 比亚迪股份有限公司 | Steering and vehicle |
| CN107813866A (en) * | 2016-09-14 | 2018-03-20 | 比亚迪股份有限公司 | Steering and vehicle |
| CN107813868A (en) * | 2016-09-14 | 2018-03-20 | 比亚迪股份有限公司 | Steering and vehicle |
| CN109677221A (en) * | 2019-02-14 | 2019-04-26 | 浙江亚太机电股份有限公司 | Across the virtual stub suspension system of core wheel |
| CN109677221B (en) * | 2019-02-14 | 2023-11-14 | 浙江亚太机电股份有限公司 | Virtual kingpin suspension system through wheel center |
| CN109733475A (en) * | 2019-03-06 | 2019-05-10 | 刘恩托 | A kind of steering system and two wheels automobile |
| CN112389536A (en) * | 2020-12-10 | 2021-02-23 | 福州盛世凌云环保科技有限公司 | Automobile steering transmission mechanism |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |