Vehicle variable rigidity suspension

FIELD: general engineering.

SUBSTANCE: invention relates to variable-rigidity suspensions of vehicles. Proposed variable-rigidity suspension has elastic member and balancer hinge-connected with lever moving by means of roller secured on lever over surface of cam with designed profile of support surface providing preset optimum characteristics of suspension with great number of different values of rigidity coefficient. Suspension implements nonlinear characteristic with minimum values of coefficient of rigidity at initial strokes of wheels at f<0,05 m and designed increase of rigidity coefficient at wheel stroke exceeding f>0,05 m. Elastic metal member is essentially compression spring transmitting force to vehicle body and secured by one on lever. Surface of cam with designed profile of support surface and part of lever with roller can be made in closed housing protecting mechanism from abrasive action of dust and dirt.

EFFECT: improved quality of vehicle spring owing to reduction of action of high-frequency vibration accelerations onto driver.

2 cl, 7 dwg

 

The invention relates to the field of General engineering and is a suspension of the variable stiffness of the vehicle.

Suspension with elastic metal elements that do not have devices to regulate their own characteristics, have a linear dependence of the force (p) from moving wheels (f)transmitted to the machine body, and therefore have a constant stiffness coefficient (see figure 1).

The stiffness coefficient (m) is the ratio of the force (p) to move the wheel (f) and is defined as the slope of the tangent to the curve point. The specific design of this type of springs there is one value of the stiffness coefficient (m1).

Pendant constant stiffness provides the most satisfactory quality cushioning only on the modes characterized the optimal value for a single value of the stiffness coefficient of the spring (m), height (h) and amplitudes (a) of the roughness profile path.

Failure to meet these conditions the suspension works in hard mode shock ("break"), or in the mode of "shaking" (transmission from the wheels through the suspension to the body of the machine high-frequency acceleration when the vehicle with some speed on small and frequent unevenness of the height h of<0.05 m).

Modes of motion "breakdown" and "shaking" have on the driver h is a positive effect, driving to exit system "car people" of the above modes, at least, reduce the speed.

Suspension of the type indicated above as a result of construction relative simplicity and low cost of manufacture found most widespread in the automotive industry.

One example ensure smooth running of vehicles equipped pendants with linear elastic characteristic element is the use of a parallelogram suspension wheels (EN 2189322, 60G 3/14, 3/18).

To eliminate the drawbacks characteristic of suspensions with constant stiffness and more optimal operating parameters of the suspension system using variable suspension stiffness, having a nonlinear characteristic of the elastic element (see figure 2).

The nonlinearity of such a suspension is characterized by a set of values of the damping coefficients (m1; ...; mnin contrast to a single value (m1) (for suspensions with constant stiffness).

The presence of multiple values of the stiffness coefficient in the suspensions with non-linear characteristic of the elastic element defines the extended range of the optimal ratios of parameters (m; v; h; a), which provides a satisfactory quality cushioning in a wider range of velocity values of t is s (v), heights (h) and amplitudes (a) of the unevenness of the path.

Suspension variable stiffness, typically in the form of air springs having as a working medium gas. The nonlinearity of the suspension, or the degree of curvature is determined for such springs physical characteristics of the gas, called polytropos compression and for the specific gas having a fixed value. So to change to an even greater extent, the slope of the air springs (nonlinearity) to obtain the "ideal" ("soft" springs with small values of the coefficient of rigidity in the wheel moves f<0.05 m and "hard" springs with large values of the coefficient of rigidity when f>0.05 m) suspension without the use of complex systems of automatic regulation (CAP) is not possible.

The air bags are characterized by the complexity of the design (the need for assured sealing of the closed volume of gas under high pressure; volatility characteristics due to temperature fluctuations of the working fluid), high cost of manufacture relative to the springs, in which the working fluid used elastic metal elements.

The aim of the present invention is to eliminate said drawbacks and improving the quality of recovery of the vehicle through the Eisenia impact driver high-frequency accelerations shaking.

The invention consists in that the suspension of the vehicle suspension is used with the elastic metal element, equipped with a copier with an estimated profile of the support surface, providing the necessary predetermined optimum characteristic charms with many different values of stiffness coefficient (m1; ...; mn).

The proposed solution is implemented in the form of an elastic metal element and balancer, pivotally connected to the lever, which is secured on the roller moves along the surface of the copier with an estimated profile of the support surface, providing a predetermined optimum characteristic charms with many different values of the coefficient of rigidity sufficient to remove high-frequency component of the spectrum of vibrations transmitted to the driver (passenger) due to the minimum values of the coefficient of stiffness of the suspension at the initial moves of the wheels when f<0.05 m and the estimated increase in the stiffness coefficient on the moves of the wheels over f>0.05 m (see figure 3).

The invention is illustrated by figure 4, which depicts: 5 - equalizer; 6 - lever pivotally connected with the rocker 5 at point L; 8 - roller mounted on the lever at the point L1and floating on the surface of the copier with the design profile reference is poverhnosti 4; 10 - elastic metal element in the form of a compression spring 7, one end attached to the lever 6; 9 - elastic protective sleeve.

The suspension is carried out as follows. When hitting an obstacle, the wheel moves up, causing the force from the wheels is transmitted through the rocker 5 and the elastic metal element 10 in the form of a compression spring 7, one end of the fixed on the lever 6, the vehicle body 3.

While the roller 8 of the lever 6 is moved along the surface of the copier with an estimated profile of the support surface. Copier 4 having a design profile reference surface, described by some nonlinear function ensures optimum suspension characteristics of the vehicle, as the relationship between the moving wheels and the change in the distance between the points of attachment of the spring to the vehicle body 3 and the arm 6, that is, by changing the length of the spring is nonlinear.

This nonlinearity is due to the fact that the pair "arm-copier" (the free end of the movable lever that is moved by roller over the surface of the copier with an estimated profile of the support surface) plays the role of a link that specifies a variable transmission ratio between the movement of the wheel and a corresponding change in length of the spring and thus providing a variable degree compressed the I springs.

Elastic protective cover protects the profile surface of the Cam and the roller surface from the abrasive effects of sand and mud.

The effect of variable compression springs in the proposed technical solution is illustrated kinematic diagram (figure 5) and graphs (6 and 7).

When moving the wheel from the position a to the position D is the change in length of the spring from the size of the OA1to size OD1on nonlinear law (Fig.6, where: f - move wheels, s - deformation of the spring by movement of the lever on nonlinear profile of the copier. Moreover, the maximum length of the spring (the size of the OA1) meet the minimum force of its compression, and the minimum length (size OD1) - the maximum force of compression.

For a nonlinear function of the deformation of the spring from moving the wheel there is an inverse non-linear function of the force transmitted to the vehicle body from moving wheels (Fig.7, where: f is the displacement of the wheel, R is the power transmitted to the vehicle body).

The result of using these designs pendants-frequency vibrations (shaking that occurs when the vehicle is at high speed through small and frequent irregularities will not be transmitted to the driver.

The main effect to be produced by the proposed technical solution for luchetta in providing high smoothness of the machine when driving at high speeds on small and frequent irregularities by eliminating high-frequency component of the spectrum of fluctuations, transmitted to the driver (passenger), due to the minimal values of the coefficient of stiffness of the suspension at the initial moves of the wheels when f<0.05 m (see figure 3) and prevent breakouts (hard beats) suspension due to the estimated increase in the stiffness coefficient on the moves of the wheels over f>0,05 m

1. Suspension of the variable rigidity of the vehicle, an elastic metal element and rocker, pivotally connected to a lever, which is secured on the roller moves along the surface of the copier with an estimated profile of the support surface, providing a predetermined optimum characteristic charms with many different values of the coefficient of rigidity, characterized in that it implements a nonlinear characteristic with the minimum values of the coefficient of stiffness of the suspension at the initial moves of the wheels when f<0.05 m and the estimated increase in the stiffness coefficient on the moves of the wheels over f>0.05 m, while the metallic elastic element is a compression spring that transmits the force on the vehicle body and one end fixed on the lever.

2. The suspension according to claim 1, characterized in that the surface of the copier with an estimated profile of the support surface and the portion of the lever with roller carried out in a closed casing that protects the mechanism from abrasive dirt and dust.



 

Same patents:

The invention relates to an elastic suspensions with rigid lever, located parallel to the longitudinal axis of the vehicle and is equipped with devices limiting the movement of the suspension elements

The invention relates to an elastic suspensions

The invention relates to the automotive industry, in particular to the structure of the suspension levers, arranged parallel to the longitudinal axis of the vehicle, and allows the suspension with the associated levers to reduce the number of connections of the suspension elements and to reduce the load design without limiting its functionality

The invention relates to the field of engineering, namely suspensions of the wheels of the vehicle

FIELD: general engineering.

SUBSTANCE: invention relates to variable-rigidity suspensions of vehicles. Proposed variable-rigidity suspension has elastic member and balancer hinge-connected with lever moving by means of roller secured on lever over surface of cam with designed profile of support surface providing preset optimum characteristics of suspension with great number of different values of rigidity coefficient. Suspension implements nonlinear characteristic with minimum values of coefficient of rigidity at initial strokes of wheels at f<0,05 m and designed increase of rigidity coefficient at wheel stroke exceeding f>0,05 m. Elastic metal member is essentially compression spring transmitting force to vehicle body and secured by one on lever. Surface of cam with designed profile of support surface and part of lever with roller can be made in closed housing protecting mechanism from abrasive action of dust and dirt.

EFFECT: improved quality of vehicle spring owing to reduction of action of high-frequency vibration accelerations onto driver.

2 cl, 7 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive suspensions and transport facilities incorporating such suspension. Suspension comprises spring 1, cover 3 and centering cup 7 supporting coiled spring end 2 in cover 3. Centering cup 7 has its top part provided with, in fact, round, press-fitting 11 that forms hollow part to receive cover 3. Ribs 14 are arranged along inner edges of cover 3. Shape of ribs 14 allows their arrangement on ledge 13 made inside press-fitting 11. Cover 3 and centering cup 7 comprises appliances to lock angular position of spring 1 relative to cup 7. Press-fitting depth varies continuously to make inclination over entire length interact with cover 3 and coiled spring end. The deepest part of press-fitting 11 forms locking appliances for edge 10 of cover 3. Transport facility comprises abode described suspension.

EFFECT: fixed angular position of spring in cover and on centering cup, simplified suspension assembly.

6 cl, 3 dwg

FIELD: transport.

SUBSTANCE: car variable-rigidity spring support 1 consists of main part 6 and rigid or semi-rigid insert 7. Suspension spring 1 rests directly onto rigid or semi-rigid insert 7. Said main part 6 comprises truncated-cone base 8 running from smaller diametre top side. Truncated cone elongation 9 runs coaxially from said base, elongation larger diametre being smaller than least diametre of base 8. Insert 7 comprises truncated-cone base 13 running from smaller diametre top side. Truncated cone elongation 14 runs coaxially from said base. Insert 7 has axial cavity with its inner shape and sizes corresponding to outer shape and sizes of elongation 9 of main part 6.

EFFECT: simplified design of support element.

9 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building. In compliance with first version, proposed gasket is composed by elongated linear article composed by vibroisolating segments interconnected by one or two crosspieces made up of narrow strip. In compliance with second version, proposed gasket is composed by elongated linear article composed by vibroisolating segments interconnected by thin strip composed by a cylinder or its parts, or a crimp or its parts.

EFFECT: possibility to be fitted on different-diameter springs.

2 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: group of inventions relates to machine building. Device comprises spring (3) with coating (7). Spring support (4) is made of plastic. Spring (3) and its support (4) are glued together with adhesive layer (8). Hardness of adhesive layer (8) is less than the hardness of coating (7). Method includes the steps of manufacturing spring device (2).

EFFECT: improved resistance to wear and improved service life is achieved.

16 cl, 5 dwg

FIELD: general engineering.

SUBSTANCE: invention relates to variable-rigidity suspensions of vehicles. Proposed variable-rigidity suspension has elastic member and balancer hinge-connected with lever moving by means of roller secured on lever over surface of cam with designed profile of support surface providing preset optimum characteristics of suspension with great number of different values of rigidity coefficient. Suspension implements nonlinear characteristic with minimum values of coefficient of rigidity at initial strokes of wheels at f<0,05 m and designed increase of rigidity coefficient at wheel stroke exceeding f>0,05 m. Elastic metal member is essentially compression spring transmitting force to vehicle body and secured by one on lever. Surface of cam with designed profile of support surface and part of lever with roller can be made in closed housing protecting mechanism from abrasive action of dust and dirt.

EFFECT: improved quality of vehicle spring owing to reduction of action of high-frequency vibration accelerations onto driver.

2 cl, 7 dwg

FIELD: automotive industry.

SUBSTANCE: invention relates to vehicle suspension system. Axles are fixed to the front and rear parts of the vehicle frame. The front sub-frame with front wheels are installed on the front axle, while the rear sub-frames with rear wheels are installed on the rear axle. The sub-frames are installed so that they can swing within the plane crossing longitudinal axis of symmetry perpendicularly to horizontal plane of vehicle frame. In addition the front sub-frame is linked to the frame by ropes, the rear sub-frames are linked by means of other ropes accordingly. Each rope is provided with tensioning devices. The front wheels are installed with the help of lever system and springing elements. The rear wheels are installed on the related sub-frame. Each rope is also provided with supporting device. The traveling comfort on even road is mainly ensured by lever system interacting with springing elements of the front wheels. Near rear wheels the same vibration is silenced by the rare sub-frames. The reactive force arising from head-on crash will lift the front wheel up, turn lever system and compress springing element. After that the force is transmitted to the front sub-frame, which aims at turning around axis. The effort is felt by corresponding ropes.

EFFECT: reduced metal consumption for vehicle body ensuring sufficient mechanical strength.

4 dwg

Wheeled vehicle // 2371346

FIELD: transportation.

SUBSTANCE: invention relates to wheeled vehicles that features increased road-holding. Proposed vehicle incorporates propulsor which represents disks with their both sides accommodating staggered pockets (12). The latter house wheels (13) attached to disks. Shafts with disks and wheels (13) are lever-mounted and coupled with engine. Disk side surfaces can accommodate staggered working members, e.g. plates, buckets.

EFFECT: increased cross-country capacity.

2 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive suspensions. Suspension comprises RH and LH lengthwise levers mounted on vehicle body with the help of flexible elements. Axle bracket 301 is mounted on the end of lengthwise lever 302 and includes first and second plate elements 301a and 301b. The bearing of axis is mounted on the first plate element (301 a), wich accommodates at the longitudinal direction of vehicle. Second plate element 301b is secured to front edge of first flat plate element 301a at angle varying from 60 to 90 degrees. End of lengthwise lever 302 is butt-welded to front side of second plate element 301b at angle varying from 60 to 90 degrees.

EFFECT: reduced weight, better performances.

12 cl, 10 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry, particularly, to car suspensions. Proposed suspension comprises struts of Macpherson suspension, lower levers, silent blocks, steering mechanism, power link, developed-section girder, centering springs, connection rod, double-acting hydraulic cylinder, hydraulic pump, hydraulic control valve, spool valve, wheel tilt control mechanism, and steering wheel drive mechanism. Power link is engaged via silent blocks with lower levers to displace in developed-section girder bushes. Centering spring and connection rod are arranged in said developed-section girder. Said rod if engaged with power link and double-acting hydraulic cylinder. Working chamber of said hydraulic cylinder is communicated via branch pipes with hydraulic control valve and spool valve. Said both valves are communicated with wheel tilt mechanism. The latter comprises cam mechanism and sprocket fitted on steering shaft.

EFFECT: controlled wheel tilt, better stability and controllability.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building. Proposed suspension comprises lever and flexible element. One end of said lever is secured at vehicle wheel while another end is jointed with wheel axle. Convex thrust is fitted at lever top surface. Flexible element is composed of slightly bent elongated plate. Plate one end is hinged to vehicle body in the plane of lever swinging. Plate opposite end is rigidly jointed with aforesaid thrust on lever hinge side. Plate end abuts the thrust convex surface. Plate convex side interacts at load with thrust convex side in running conditions.

EFFECT: regressive-progressive characteristic of suspension.

3 dwg

FIELD: transport.

SUBSTANCE: invention relates to machine building, particularly, to automotive resilient suspensions with nonlinear resilient characteristics. Proposed suspension comprises lever, resilient element and extra resilient element. One end of said lever is articulated with carrier body while is connected with the wheel axle. Resilient element is composed of slightly bent long plate with one end articulated with carrier body in the lever swing plane. Lever opposite end is rigidly coupled with said lever so that plate end abuts on the lever flat surface while the plate convex side in operation interacts with the lever flat plane in run-in mode. Extra resilient element is composed of slightly bent long plate with one end articulated with the lever. Opposite end of the lever is rigidly secured to carrier body to make plate end abuts on carrier body. Plate convex side interacts with the body flat surface in run-in mode.

EFFECT: decreased load at suspension resilient element at puncture and higher stiffness at release.

3 dwg

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