Wheel track adjustable dual wheel suspension and vehicle using the same

Abstract

The present application relates to a kind of wheel track adjustable double wheel suspensions and vehicle applying the suspension, belong to vehicle chassis technical field, especially relate to balanced suspension control technical category;Double wheel suspension is connected two wheels by multiple connecting rod mechanism according to the wheel track set, double wheel bearing, suspension mechanism linkage, double shock absorber coordinated deformation, improve the ground adaptability and lateral stability of vehicle;Provide a kind of transverse double wheel balanced suspension, vehicle wheel track dynamic adjustable, with the characteristics of light weight, good damping and guiding buffering effect, high lateral stability, applied to the balanced suspension system of various multipurpose vehicles, provide a new method for vehicle design.

Description

TECHNICAL FIELD

[0001] The present application relates to a wheel track adjustable double wheel suspension and a vehicle using the same, and belongs to the technical field of vehicle chassis, in particular to the balance suspension control technology. BACKGROUND

[0002] The balance suspension originated from the three-axle and four-axle off-road trucks, so that each wheel has adhesion when the vehicle runs on uneven road, and the vertical load of the front and rear axle wheels is evenly distributed; the working principle of the balance suspension is to adjust the stiffness and damping of the suspension system, so that the vehicle can better resist the motion of roll, pitch and roll during running; after the lightweight design of the balance suspension, it has the characteristics of light weight, good damping and guiding buffer effect, and high stability, and is applied to the balance suspension system of various multipurpose vehicles. The main advantage of the balance suspension is to improve the handling performance and safety performance of the vehicle, so as to improve the stability of the vehicle during high-speed running.

[0003] Compared with the independent suspension, the whole axle belongs to a transverse double wheel balance suspension determined by the wheel track, the wheels on both sides bear, the vehicle can bear greater lateral external force and resist instantaneous centrifugal force on the curve through the elastic deformation motion of the torsion bar and the coordinated deformation of the damping system on both sides, the vehicle has good lateral stability, good strength and simple structure, and can improve the road adaptability and curve driving speed of the vehicle; for the narrow body light vehicle with small wheel track, the transverse double wheel balance suspension is beneficial to improve the lateral stability of the vehicle and prevent the vehicle from rolling over. SUMMARY

[0004] The purpose of the present application is to provide a wheel track adjustable double wheel suspension and a vehicle using the same, the double wheel suspension is connected with two wheels according to the set wheel track, the double wheel bears, the suspension mechanism is linked, and the double shock absorbers are coordinated to deform, the wheel track of the vehicle is dynamically adjustable, so as to improve the wheel set load performance and the lateral stability performance of the vehicle.

[0005] In order to achieve the purpose of the present application, the technical scheme adopted includes:

[0006] The adjustable track double wheel suspension includes: a support shaft (101) and a straight guide rail (102) are arranged on a vehicle body (10) and are perpendicular to a vehicle body horizontal plane, an axis of the support shaft (101) is located in a vehicle body median plane, the support shaft (101) of the vehicle body is rotationally connected with one end of two draw bars (11) at a connection point O, the other ends of the two equal-length draw bars (11) are rotationally connected with one end of two cross beams (14) at two connection points A and A', and the two cross beams (14) are arranged in opposite directions; two swing bars (12) are arranged in an X shape and staggered, the middle points of the two equal-length swing bars (12) are rotationally connected with the support shaft (101), the lower ends of the two swing bars (12) are rotationally connected with one end of two swing arms (13) at two connection points D and D', the other ends of the two equal-length swing arms (13) are rotationally connected with the two cross beams (14) at two connection points B and B', the upper ends of the two swing bars (12) are rotationally connected with one end of two shock absorbers (16) at two connection points E and E', the other ends of the two equal shock absorbers (16) are rotationally connected with the two cross beams (14), two connection points C and C' are located on the extension lines of the cross beams AB and A'B', rotational axes of the rotational connection points are parallel to each other and are perpendicular to the vehicle body horizontal plane, a motion chain with the same relative motion plane is formed, and the relative motion plane is parallel to the vehicle body horizontal plane; in the same relative motion plane, geometric conditions are met: DB=D'B'=AB=A'B', AO=A'O=2DB, DE'=ED'=4DB, EC=E'C'=4DB, and AC=A'C'=4DB; the other ends of the two equal-length cross beams (14) are rotationally connected with two vehicle wheels (15), and rotational axes of the two vehicle wheels (15) are perpendicular to the vehicle body median plane.

[0007] A track control mode of the two vehicle wheels is as follows: a sliding block (17) is movably connected with the straight guide rail (102) of the vehicle body, one end of each of two connecting rods (18) is rotationally connected with the sliding block (17), two connection points F and F' are symmetrical about the vehicle body median plane, the other ends of the two equal-length connecting rods (18) are rotationally connected with the two cross beams (14), two connection points G and G' are symmetrical about the vehicle body median plane, and rotational axes of the rotational connection points are perpendicular to the vehicle body horizontal plane; the sliding block (17) moves along the straight guide rail (102) by a displacement h, a track S of the two vehicle wheels (15) changes, and the track S=f(h); the sliding block (17) is limited to move along the straight guide rail (102), and the track S of the two vehicle wheels (15) is fixed; the vehicle wheels (15) rotate relative to the cross beams (14), the vehicle travels, the two vehicle wheels (15) are loaded, the suspension mechanism is linked, the two shock absorbers (16) are deformed coordinately, and the adjustable track double wheel suspension is formed.

[0008] The sliding block moves along the linear guide driven and controlled by the hydraulic cylinder, which is suitable for general medium load vehicles; the sliding block moves along the linear guide driven and controlled by the electric push rod or electric cylinder, which is suitable for light load vehicles.

[0009] A vehicle comprising the wheel track adjustable double wheel suspension described above;

[0010] Among them, a four-wheel vehicle comprises two groups of wheel track adjustable double wheel suspensions with the same structure and performance parameters arranged in front and back according to a given vehicle wheelbase, the two groups of wheel track adjustable double wheel suspensions share the same vehicle body and have the same vehicle body vertical plane, four wheels are independently driven and differentially steered; the vehicle chassis front and rear wheel track is dynamically adjustable, four wheels are loaded, the suspension mechanism is linked, and the double shock absorbers are coordinated to deform; the wheel set has good load carrying capacity and lateral stability, which can improve the ground adaptability and cornering speed of the vehicle.

[0011] Among them, a three-wheel vehicle comprises a group of wheel track adjustable double wheel suspensions arranged at the rear, a single front wheel arranged on the same vehicle body according to a given wheelbase, sharing the same vehicle body vertical plane, the front wheel is steered, and the two rear wheels are driven; two rear wheels are loaded, the suspension mechanism is linked, and the double shock absorbers are coordinated to deform; the vehicle wheel track is dynamically adjustable, when the vehicle runs with a larger wheel track, the vehicle has good lateral stability and good anti-rollover performance when cornering; when parked, the wheel track is adjusted to the minimum, saving the vehicle floor area.

[0012] The beneficial effects of the present application are that the proposed wheel track adjustable double wheel suspension and the vehicle applying the suspension provide a transverse double wheel balance suspension, which improves the ground adaptability and lateral stability of the vehicle through double wheel loading, suspension mechanism linkage, and double shock absorber coordinated deformation; the vehicle wheel track is dynamically adjustable, and the balance suspension system is applied to various multipurpose vehicles, providing a new method for vehicle design. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The mechanism diagram of the wheel track adjustable double wheel suspension;

[0014] Figure 2 The composition principle diagram of the wheel track adjustable double wheel suspension;

[0015] Figure 3 The wheel track adjustment principle diagram of the double wheel suspension;

[0016] Figure 4 The minimum wheel track position diagram of the double wheel suspension;

[0017] Figure 5 The maximum wheel track position diagram of the double wheel suspension;

[0018] Figure 6 The shock absorber coordinated deformation principle diagram of the double wheel suspension;

[0019] Figure 7 is a four-wheel vehicle composition schematic diagram;

[0020] Figure 8 is a three-wheel vehicle composition schematic diagram;

[0021] In the figure: 10 - vehicle body, 101 - support shaft, 102 - straight guide rail, 11 - pull rod, 12 - swing rod, 13 - rocker arm, 14 - cross beam, 15 - wheel, 16 - shock absorber, 17 - sliding block, 18 - connecting rod. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described below according to the accompanying drawings:

[0023] Figure 1 As shown is a mechanism schematic diagram of an adjustable wheel track double-wheel suspension, the adjustable wheel track double-wheel suspension comprising: a support shaft (101) and a straight guide rail (102) are arranged on a vehicle body (10) and are perpendicular to a vehicle body transverse surface and a vehicle body horizontal surface, an axis of the support shaft (101) is located in a vehicle body median surface, the support shaft (101) of the vehicle body is rotationally connected with one end of two pull rods (11) at a connection point O, the other ends of the two equal-length pull rods (11) are rotationally connected with one end of two cross beams (14) at two connection points A and A', the two cross beams (14) are arranged in opposite directions; two swing rods (12) are arranged in an X-shaped staggered manner, midpoints of the two equal-length swing rods (12) are rotationally connected with the support shaft (101), lower ends of the two swing rods (12) are rotationally connected with one end of two rocker arms (13) at two connection points D and D', the other ends of the two equal-length rocker arms (13) are rotationally connected with the two cross beams (14) at two connection points B and B', upper ends of the two swing rods (12) are rotationally connected with one end of two shock absorbers (16) at two connection points E and E', the other ends of the two same shock absorbers (16) are rotationally connected with the two cross beams (14), two connection points C and C' are located on extended lines of AB and A'B' of the cross beams, rotational axes at each rotational connection point are parallel to each other and are perpendicular to the vehicle body transverse surface, a motion chain with a same relative motion plane is formed, the relative motion plane is parallel to the vehicle body transverse surface; in the same relative motion plane, a geometric condition is satisfied: DB = D'B' = AB = A'B', AO = A'O = 2DB, DE' = ED' = 4DB, EC = E'C' = 4DB, AC = A'C' = 4DB; the other ends of the two equal-length cross beams (14) are rotationally coupled with two wheels (15), rotational axes of the two wheels (15) are both perpendicular to the vehicle body median surface, and the rotational axes of the two wheels coincide;

[0024] The track control mode of the two wheels: the slider (17) is movably connected with the linear guide rail (102) of the vehicle body, one end of each of the two connecting rods (18) is rotatably connected with the slider (17), the two connecting points F and F' are symmetrical about the median plane of the vehicle body, the other end of each of the two equal-length connecting rods (18) is rotatably connected with the two cross beams (14), the two connecting points G and G' are symmetrical about the median plane of the vehicle body, and the rotation axes at each rotatable connecting point are perpendicular to the horizontal plane of the vehicle body; the slider (17) moves along the linear guide rail (102) by a displacement h, the track of the two wheels (15) changes, and the track S=f(h) of the two wheels (15) changes, as shown in Figure 3 ; when h=h1, the track S=S1 of the two wheels is the minimum track of the vehicle, as shown in Figure 4 ; when h=h2, the track S=S2 of the two wheels is the maximum track of the vehicle, as shown in Figure 5 ; the slider (17) is limited to move along the linear guide rail (102), the track S of the two wheels (15) is fixed, the wheels (15) rotate relative to the cross beams (14), the vehicle travels, the two wheels (15) bear, the suspension mechanism is linked, the two shock absorbers (16) are deformed in coordination, and the track-adjustable double-wheel suspension is formed, as shown in Figure 2 ; the track-adjustable double-wheel suspension is symmetrical about the median plane of the vehicle body.

[0025] In the above-described track-adjustable double-wheel suspension, the movement of the slider along the linear guide rail is driven and controlled by a hydraulic oil cylinder, the end of the oil cylinder is rotatably connected with the vehicle body (10), and the output end of the piston rod is rotatably connected with the slider (17), which is suitable for a general medium-load vehicle; the movement of the slider along the linear guide rail is driven and controlled by an electric push rod or an electric cylinder, the body is rotatably connected with the vehicle body (10), and the output end of the push rod or the cylinder rod is rotatably connected with the slider (17), which is suitable for a light-load vehicle.

[0026] Figure 6 The principle diagram of the coordinated deformation of the double-wheel suspension shock absorber is shown in the figure, and the principle of the coordinated deformation of the double shock absorbers is as follows: during the travel of the vehicle, the slider (17) is limited to move along the linear guide rail (102), that is, the given displacement is h, the track of the two wheels (15) is fixed as S, the height of the vehicle body from the ground is H, it is assumed that the road force on the P-side wheel changes, the wheel rises by ΔH, and the compression shock absorber CE deforms by Δp, at this time, the P-side cross beam moves in a plane parallel to the horizontal plane of the vehicle body, the suspension mechanism transmits the movement, the quadrilateral movement chains AGFO and ABDO deform, DE' rotates around the point O, and the other shock absorber C'E' deforms by Δq, the deformations Δp and Δq of the two shock absorbers balance the external force together, the double shock absorbers deform in coordination, and the lateral stability of the vehicle is maintained.

[0027] Figure 7A four-wheel vehicle assembly principle diagram is shown, wherein: the xy plane is the vehicle body horizontal plane, the yz plane is the vehicle body transverse vertical plane, and the xz plane is the vehicle body central vertical plane; a four-wheel vehicle comprises: two groups of wheel track adjustable double-wheel suspensions arranged in front and back according to a given vehicle wheelbase, the two groups of wheel track adjustable double-wheel suspensions share the same vehicle body and have the same vehicle body central vertical plane, four wheels are independently driven by hub motors and differentially steered; the front and rear wheel tracks of the vehicle chassis are dynamically adjustable, during the wheel track adjustment process, the two front wheel rotation axes always coincide, and the two rear wheel rotation axes always coincide; the four wheels are load-bearing, the suspension mechanism is linked, and the double shock absorbers are deformed in coordination, the wheel set has good load-bearing capacity and lateral stability, and the ground adaptability and corner driving speed of the vehicle can be improved.

[0028] Figure 8 A positive three-wheel vehicle assembly principle diagram is shown, wherein: the xy plane is the vehicle body horizontal plane, the yz plane is the vehicle body transverse vertical plane, and the xz plane is the vehicle body central vertical plane; a positive three-wheel vehicle comprises: a group of rear wheel track adjustable double-wheel suspensions, a front wheel is connected on the same vehicle body according to a given wheelbase through a steering main shaft, a U-shaped steering knuckle, and two front shock absorbers, sharing the same vehicle body central vertical plane, single front wheel steering, double rear wheels are independently driven by hub motors, two rear wheels are load-bearing, the suspension mechanism is linked, and the double shock absorbers are deformed in coordination; the vehicle wheel track is dynamically adjustable, during the wheel track adjustment process, the two rear wheel rotation axes always coincide, when a larger wheel track is driven, the vehicle has good lateral stability and good rollover prevention performance when driving on a curve; when parked, the wheel track is adjusted to the minimum, and the vehicle occupies less floor space.

Claims

1. A wheel track adjustable double wishbone suspension characterised in that, The body of the vehicle is provided with a supporting shaft perpendicular to the lateral plane of the body and a linear guide perpendicular to the horizontal plane of the body, the axis of the supporting shaft is located in the median plane of the body, the supporting shaft is rotatably connected with one end of two pull rods at connection points O, the other ends of the two equal-length pull rods are rotatably connected with one end of two crossbeams at two connection points A and A', the two crossbeams are arranged in opposite directions; two swing rods are arranged in an X-shaped staggered manner, the midpoints of the two equal-length swing rods are rotatably connected with the supporting shaft, the lower ends of the two swing rods are rotatably connected with one end of two swing arms at two connection points D and D', the other ends of the two equal-length swing arms are rotatably connected with the two crossbeams at two connection points B and B', the upper ends of the two swing rods are rotatably connected with one end of two shock absorbers at two connection points E and E', the other ends of the two equal-length shock absorbers are rotatably connected with the two crossbeams, two connection points C and C' are located on the extension lines of AB and A'B' of the crossbeams, the rotation axes of the rotatable connection points are parallel to each other and perpendicular to the lateral plane of the body, a motion chain with the same relative motion plane is formed, and the relative motion plane is parallel to the lateral plane of the body; in the same relative motion plane, the geometric conditions are satisfied: DB=D'B'=AB=A'B'=AO=A'O=2DB, DE'=ED'=4DB, EC=E'C'=4DB, and AC=A'C'=4DB; the other ends of the two equal-length crossbeams are rotatably connected with two wheels, and the rotation axes of the two wheels are perpendicular to the median plane of the body. The slider is movably connected with the linear guide of the body, one end of two connecting rods is rotatably connected with the slider at two connection points which are symmetrical about the median plane of the body, the other ends of the two equal-length connecting rods are rotatably connected with two crossbeams at two connection points which are symmetrical about the median plane of the body, and the rotation axes of the rotatable connection points are perpendicular to the lateral plane of the body; when the slider moves along the linear guide, the wheel track of the two wheels changes, the movement of the slider along the linear guide and the wheel track of the two wheels are determined, the wheels rotate relative to the crossbeams, the vehicle moves, the two wheels are loaded, the suspension mechanism is linked, and the two shock absorbers are deformed coordinately. The movement of the slider along the linear guide is driven and controlled by a hydraulic oil cylinder.

2. The trackable dual wheel suspension of claim 1, wherein, The movement of the slider along the linear guide is driven and controlled by an electric push rod or an electric cylinder.

3. The trackable dual wheel suspension of claim 1, wherein, The adjustable-wheel-track double-wheel suspension according to claim 1.

4. A vehicle characterized by comprising: The adjustable-wheel-track double-wheel suspension according to claim 1. ​

Images