CN104058005A - Diamond steering mechanism - Google Patents
Diamond steering mechanism Download PDFInfo
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- CN104058005A CN104058005A CN201410305068.0A CN201410305068A CN104058005A CN 104058005 A CN104058005 A CN 104058005A CN 201410305068 A CN201410305068 A CN 201410305068A CN 104058005 A CN104058005 A CN 104058005A
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- steering mechanism
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- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention discloses a novel vehicle steering mechanism, and particularly relates to a four-wheel vehicle steering mechanism which uses dual wheel deflection to rotate. According to the defect of a generally used trapezoid connecting rod steering mechanism, the invention provides the novel steering mechanism which is capable of theoretically and completely erasing corner error and can meet the large corner (greater than 45 degrees) steering requirements. The mechanism comprises two parts, a double rocker mechanism and a diamond mechanism. A special geometrical position and a special geometrical structure of the mechanism are used, so that four wheels can simultaneously rotate the center. Due to the fact that the steering process theoretically erases the corner error, the maneuverability, passing ability and operation stability of the whole vehicle can be improved, the abrasion is reduced, and thus the service life of wheels is prolonged.
Description
Technical field
The present invention relates to vehicle steering mechanism field.Specifically, be to have applied the four wheeler steering hardware that two-wheel deflection turns to.
Background technology
The steering hardware of vehicle directly affects the service life of manoevreability, crossing ability, road-holding property and the tire of car load.At Ai Keman, 19 end of the centurys, invented after trapezoidal connecting rod steering mechanism, automobile generally adopts wheel steering mode.Under ideal state, in steering procedure, should keep all wheels to circle around same instantaneous center of turn, thereby guaranteeing that whole wheels are arbitrarily instantaneous all makes pure rolling, and do not produce relative slippage.Take common four wheeler as example, and in the situation that adopting two-wheel deflection to turn to, as shown in Figure 5, left and right two steering wheel angle α, β should meet under ideal state:
cotβ-cotα=K/L
Now, can guarantee that four-wheel all does pure motion.
Trapezoidal connecting rod steering mechanism can be similar to and meet above-mentioned condition within the scope of certain angle, and version is comparatively simple, thereby on various vehicles, has obtained generally application.But undeniable, because tie rod linkage displacement characteristic can not meet completely with desired motion characteristics, so angular errors only may reduce by various prioritization schemes as far as possible, and can not eliminate completely.And common single tie rod linkage can only be applied in wheel flutter hard-over under 45 ° of left and right conditions.If steering wheel angle is larger, use instead structure more complicated turn to double trapezoid mechanism, design calculation process is more loaded down with trivial details.
Summary of the invention
The existing shortcoming that the present invention is based on trapezoidal connecting rod steering mechanism, has proposed a kind of steering mechanism, can eliminate theoretically the angular errors in Vehicular turn process completely.And can adapt to large deflection angle situation.For being greater than 45 ° of corners, do not need to use instead new mechanism.Design process is simpler.Vehicular turn performance is better.
For achieving the above object, the present invention adopts following technical scheme: the rhombus steering hardware in the present invention can be divided into two parts: double rocker mechanism and rhombus-mechanism.Wherein, rhombus-mechanism is core of the present invention.In accompanying drawing 6, double rocker mechanism is converted into the displacement input of slide block 19 corner of rocking bar 16,21.The corner of rocking bar 21 directly outputs to right steering wheel.The corner of rocking bar 16 outputs to rocking bar 13 through rhombus-mechanism again, drives the motion of left steering wheel.
Above-mentioned double rocker mechanism is by slide block 17,19,20, guide rod 18, and rocking bar 16,21 forms.
Above-mentioned rhombus-mechanism is by connecting rod 12,14, slide block 11, and guide rod 10, rocking bar 13,16 forms.
Adopt after technique scheme, as shown in Figure 6, during use, using the displacement of slide block 19 as input, by hinge D, drive rocking bar 16, rocking bar 21 to rotate.Rocking bar 21 drives right steering wheel 22 to rotate.Rocking bar 16, by rhombus-mechanism, drives rocking bar 13, left steering wheel 15 to rotate.
Utilize special geometric position and special geometric mechanism, realizing four-wheel has same instantaneous center of rotation.This mechanism plays a role based on specific geometric condition.During analysis principle, ignore the concrete oad of mechanism, only retain geometric position and geometry.Specifically, be exactly only to retain each hinge and supporting-point, each rod member is regarded as to the line segment of corresponding length simultaneously.Accompanying drawing 7 and accompanying drawing 8 are respectively the geometric model (solid line is concrete structure, and dotted line is how much required boost lines of the process of argumentation of the present invention) of slide block 19 rhombus steering hardware while moving on FB and BN.Use relevant geometric knowledge, easily prove that four-wheel has same instantaneous center of turn.And although rhombus steering hardware is symmetrical about vehicle longitudinal axis unlike Ackerman steering mechanism, the turning efficiency in the time of can proving that rhombus steering hardware is left and right and turn to geometric knowledge is the same with Ackerman steering mechanism, is also symmetrical.
Accompanying drawing explanation
Accompanying drawing 1 is the axonometric drawing of rhombus-mechanism in the present invention.
Accompanying drawing 2 is the front elevation of rhombus-mechanism in the present invention.
Accompanying drawing 3 is the left view of rhombus-mechanism in the present invention.
Accompanying drawing 4 is the birds-eye view of rhombus-mechanism in the present invention.
Accompanying drawing 5 is the inside and outside angle relation figure of diaxon automobile steering roller ideal.
Accompanying drawing 6 is rhombus steering hardware mechanism map.
Schematic diagram of mechanism when accompanying drawing 7 moves on FB for hinge D.
Schematic diagram of mechanism when accompanying drawing 8 moves on BN for hinge D.
Wherein: 1,4-connecting rod 2-bearing pin slide block 5,7-bearing pin 3-guide rod 6,9-rocking bar 8-supporting shaft.
The specific embodiment
In the present invention, the effect of double rocker mechanism is by slide block 19, along the moving of guide rod FN, to make rocking bar 16,21 produce to meet and to make four-wheel have theoretical angle of deflection, the β of same instantaneous center of turn condition.Rhombus-mechanism is symmetric to rocking bar 16 corner α (or β) on rocking bar 13 and outputs to revolver.Rhombus-mechanism has played the effect of symmetrical corner, is the core of this steering hardware.Below in conjunction with accompanying drawing, further illustrate the concrete enforcement of rhombus-mechanism in the present invention.
In accompanying drawing 1, the corner of rocking bar 9, as input, by connecting rod 1, drives bearing pin slide block 2 to move in guide rod 3.Bearing pin slide block is drivening rod 4 again.Finally make rocking bar 6 rotate.By making distance between two length of connecting rod and rocking bar two hinges equate (being above-mentioned AH=HI=IJ=AJ), thereby finally realize the symmetrical output function of corner of rhombus-mechanism in design.The essence of rhombus-mechanism can be regarded the double crank slider mechanism being arranged symmetrically with as.In fact, (take one-sided is example to the common double crank slider mechanism being arranged symmetrically with, and AHHI) also can meet the symmetrical output function of corner herein.But, take one-sided slider-crank mechanism as example, if HI<AH, steering locking angle out of reach is 90 °.If HI>AH, mechanism is compact not again.In the present invention, be designed to rhombus, just can guarantee that hard-over is 90 °, and compact conformation.
In accompanying drawing 2 and accompanying drawing 3, when determining, the height dimension of bearing pin, connecting rod, rocking bar avoids interfering in short transverse.
Claims (5)
1. a novel vehicle steering mechanism, is characterized in that having eliminated theoretically the angular errors in steering procedure completely, makes four-wheel have same instantaneous center of turn, and can adapt to large corner (being greater than 45 °) and turn to requirement.
2. vehicle steering mechanism according to claim 1, it is characterized in that: contrast accompanying drawing 5 and accompanying drawing 6, hinge A, C, F are three supporting-point of vehicle, hinge N is on vehicle frame, guide rod 10 one end are fixed on hinge A, the other end is fixed on vehicle frame, and guide rod 18 is crossed AC mid point B, and guide rod 10 is along A, C direction.
3. vehicle steering mechanism according to claim 1, is characterized in that: in accompanying drawing 6, slide block 17,19,20 is articulated with same point D, and moves and mobile along guide rod FB with slide block 19.
4. vehicle steering mechanism according to claim 1, is characterized in that: rhombus-mechanism AHIJ is rhombus, requires AH=HI=IJ=AJ, is when guaranteeing that deflection angle maximum reaches 90 ° like this, makes mechanism as far as possible compact.
5. vehicle steering mechanism according to claim 1, is characterized in that: rhombus-mechanism spatially needs to stagger, to avoid interfering (seeing accompanying drawing 2,3) in short transverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305068.0A CN104058005A (en) | 2014-07-01 | 2014-07-01 | Diamond steering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305068.0A CN104058005A (en) | 2014-07-01 | 2014-07-01 | Diamond steering mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104058005A true CN104058005A (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410305068.0A Pending CN104058005A (en) | 2014-07-01 | 2014-07-01 | Diamond steering mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN104058005A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2117306U (en) * | 1992-03-24 | 1992-09-30 | 谷建章 | Steering gears of motor vehicle |
| EP0854077A2 (en) * | 1997-01-21 | 1998-07-22 | Kimura Unity Co., Ltd. | Steering mode switching carriage |
| CN102069846A (en) * | 2010-12-13 | 2011-05-25 | 马燕翔 | Pure rolling steering device of automobile |
| CN102285376A (en) * | 2011-06-09 | 2011-12-21 | 重庆理工大学 | Automotive steering mechanism |
| CN103448787A (en) * | 2013-09-03 | 2013-12-18 | 中国农业大学 | Wheel span adjustment and chassis steering linkage mechanism |
| CN103448797A (en) * | 2013-09-03 | 2013-12-18 | 中国农业大学 | Wheel span adjustment and steering linkage mechanism |
| CN103465964A (en) * | 2013-09-03 | 2013-12-25 | 中国农业大学 | Steering mechanism adapted to vehicles with wheel track adjusted |
-
2014
- 2014-07-01 CN CN201410305068.0A patent/CN104058005A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2117306U (en) * | 1992-03-24 | 1992-09-30 | 谷建章 | Steering gears of motor vehicle |
| EP0854077A2 (en) * | 1997-01-21 | 1998-07-22 | Kimura Unity Co., Ltd. | Steering mode switching carriage |
| CN102069846A (en) * | 2010-12-13 | 2011-05-25 | 马燕翔 | Pure rolling steering device of automobile |
| CN102285376A (en) * | 2011-06-09 | 2011-12-21 | 重庆理工大学 | Automotive steering mechanism |
| CN103448787A (en) * | 2013-09-03 | 2013-12-18 | 中国农业大学 | Wheel span adjustment and chassis steering linkage mechanism |
| CN103448797A (en) * | 2013-09-03 | 2013-12-18 | 中国农业大学 | Wheel span adjustment and steering linkage mechanism |
| CN103465964A (en) * | 2013-09-03 | 2013-12-25 | 中国农业大学 | Steering mechanism adapted to vehicles with wheel track adjusted |
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Application publication date: 20140924 |