Steerable axle of wheeled vehicle with steering gear

FIELD: transport engineering.

SUBSTANCE: invention relates to device providing stabilization of wheeled vehicles in motion. Proposed steerable axle with steering gear contains steering knuckles, cross rod operating hydraulic cylinders hinge-connected to axle beam and to steering knuckle and cross rod joints, all mounted on unspring part. Operating hydraulic cylinders act, through steering knuckles, directly onto steerable wheels at turning. Mounted on spring-actuated part are pump units, energy accumulator, steering mechanism in form of device employing for its operation principle of conversion of rotation of steering wheel with steering column into reciprocation of nut-spool thanks to which control of delivery of working liquid from pump to hydraulic cylinders to turn steerable wheels if provided.

EFFECT: reduced metal usage and cost of manufacture, improved operating characteristics and riding comfort owing to simplified design.

4 cl, 2 dwg

 

The present invention relates to the field of transport engineering and can be used for stabilizing the movement of wheeled vehicles.

The prior art in this field is characterized by the following.

Manufactured and are in operation at present, domestic and foreign cars contain a driven front axle, consisting of a beam, steering knuckle, tie rods, ball joints, and steering mechanism, including the gearbox, the steering mechanism and the steering [1, 2].

To the greatest degree relatives of the present invention serves as a steering axle of a wheeled vehicle [3], we adopted for the prototype.

Here, the steering axle of a wheeled vehicle includes a beam with rotary fists, each of which is fixed to the beam by means of hinge joints. To a beam bridge is rigidly fixed to the brackets with oblique reference sites, performed along the arc of a circle with its center coinciding with the axis of the swivel, and each steering knuckle provided with support elements in contact with these oblique reference sites, while the supporting elements are arranged so that when the straight movement of the vehicle they are located on sloping ground is in stable equilibrium state.

The main weaknesses of the existing structures (analogs and prototypes) are the following:

- due to the large number of intermediate elements, which are transmitted force from the steering wheel to steerable wheels (steering gear, shaft-fry, longitudinal and transverse thrust with swivels, fists, pivot joints and wheel bearings), increased wear of the hinge joints and tires, increases the accident rate of the rolling stock;

increases free total stroke of the steering wheel, and this leads to increased tire wear, loss of stability and stabilization of motion, the deterioration of the controllability of wheeled vehicles and, as consequence, to decrease traffic safety;

a large angle of rotation of the steering wheel when turning the steering wheel at the maximum possible angle causes the driver to cross hands (which, as you know, Smoking instructions for reasons of safety); this disadvantage manifests itself in a greater degree, if necessary, a sharp change of direction in extreme cases;

application to the steering wheel considerable effort (no power steering);

in off-road conditions or poor condition of roads shock from the steering wheel pass is located on the steering wheel, that affects the working conditions of the driver;

- straight-line driver to remove the gaps in the joints, has to turn the steering wheel alternately in both directions at a certain angle depending on the technical condition of individual nodes steering and gaps in the joints; for example, steering wheels for new passenger cars ranges from 16°...30°.

The technical result of this problem is the reduction of metal consumption and manufacturing cost, and improving the performance of the car, good driving conditions through improved design, which consists in using, instead of the traditional steering mechanical linkage swivels, hydro-mechanical devices that have a direct impact on the driven wheels through the steering knuckles.

To achieve provided by the invention a technical result driven axle wheeled vehicle with the steering control includes knuckles, transmitting efforts directly on the driven wheel axle when turning left or right lateral traction, working cylinders, fastened pivotally with the piston side to the beam bridge, and from the rod to the hinge knuckle and poperen the second thrust. Moreover, the transverse rod has a constant fixed length and does not require adjustment, as is done in existing designs of bridges.

Working cylinder includes yourself and the housing, the piston, rod, hinge, valve device, a tank for oil, hoses, high pressure hoses, low pressure. Valve device consists of a body, piston, spring, valve and performs the function of the oil drain from the piston cavity of one of the cylinders when working stroke of another cylinder.

The steering device is a mechanism that includes two pumping stations (one for backup), energoakkumulyator, hydromechanical device, steering column bearing support and the steering wheel.

Hydro-mechanical device for controlling the feed of working fluid of high pressure in the working cylinders includes a housing, a nut-valve, threaded rod bearings connected with the steering column, longitudinal rails, preventing the turning of the nut of the valve, hoses, high and low pressure.

Analysis of the known technical solutions allows to make a conclusion about the absence of these symptoms that are similar to existing the distinctive features of the claimed device, and to accept the proposed solution meets the criterion of “significant signs” image is taneem.

Figure 1 is a given schematic image of the steering axle of a wheeled vehicle in its various positions. It contains the steered wheels 1, a beam bridge 2, the pivot connection 3, the inclined supporting platform 4 with the rollers 5, located on both sides of the bearing pads, steering knuckles 6, the working cylinders 7, the transverse rod 8 and swivel 9.

On figa) - the position of the steering axle when turning right.

On figb) - the position of the steering axle when turning to the left.

Figure 2 shows combined with the sprung and unsprung parts of the hydraulic control circuit of the driven wheels.

It includes unsprung part two of the working cylinder 1, each of which has a body 2, a piston 3, the piston rod 4, the valve device 5, swivel 6, the working fluid container 7.

Valve device 5 includes a housing 8, the piston 9, the spring 10, the valve 11.

On the sprung side there are two pumping units 12, one of which is a backup, energoakkumulyator 13, hydromechanical control unit 14, the steering column 15 with a bearing support 16 and the steering wheel 17.

Hydromechanical control unit 14, the throttling of the flow of oil in the working cylinder has a housing 18, a nut-valve 19, the threaded rod 20, rodolia guides 21 with the ribs 22. Feed of fluid under pressure and discharge are carried out on the oil lines and the sleeve 23.

The proposed steering axle steering works as follows.

In straight-line motion of wheeled vehicles, for example car, the driver holds the steering wheel, turning it alternately left and right, as this is not necessary. Under the action of the mass of the sprung part of the car can not move is not straightforward.

Nut-valve 19 (see figure 2) is in the neutral position and overlaps the input channel. In this mode, the pump unit 12 operates in recirculation mode, with the oil through a special valve is returned to the tank 24 is installed. The working cylinders 1 quenched with shock from bumps in the road and the driver feels comfortable.

When turning to the left (type b) 1) the driver turns on a small corner of the steering wheel 17 (see figure 2), for example, counterclockwise. Nut-valve 19, not rotating, moving progressively through the longitudinal guides 21, opening gradually the input channel. Moreover, through the existing on the outer surface of the nut slide grooves 25 with variable depth of the undercut provides smooth control of the working fluid from the pump to the working cylinders with a pressure increase is t zero to maximum. The working fluid under pressure from the pump 12 flows through the sleeves in the right working cylinder, see figure 1 (looking in the direction of travel of the wheeled vehicle), causing the piston rod to move by turning right managed wheel to the left. The drain valve of the right channel working cylinder is under pressure in the Closed position. The working fluid at this point from the pump is supplied under pressure in the valve device left working cylinder (looking in the direction of travel of the wheeled vehicle), compresses the spring 10 (see figure 2) and opens the valve 11, letting the oil drain from the piston cavity of the left working cylinder 1 in a special container 7 provided with a reservoir pump unit 24. The left driven wheel, under the influence of lateral thrust, turns to the left simultaneously with the right driven wheel. When you need to make the wheels turn to the right (type b) 1), operations are performed in reverse order. In this case, the working cylinders to destination are swapped.

Left working cylinder operates to nominate, through a forced left turn managed wheel to the right and lift the sprung portion and the right driven wheel under the influence of lateral thrust is rotated to the right, as from Porshnev the second cavity of the right working cylinder, a working fluid is collected in a tank.

An important element of increasing the stability of a wheeled vehicle, especially when driving on curves and high speeds are supporting slanted platforms (figure 1, View a and View B)on the arc of a circle on which the two sides when turning the steering wheel obkatyvalisj, for example, tapered rollers, which ensures additional prigruzka to the mass of the sprung part of the wheeled vehicle.

The use of the present invention will reduce the intensity and cost of manufacturing and improve car performance, comfortable driving conditions by simplifying the design, which consists in using, instead of the traditional steering mechanical linkage swivels, hydraulic devices, having a direct impact on the driven wheels through the steering knuckles.

Sources of information

1. Antonov S.L. Cars URAL models 4320-01-5557. The device and maintenance, 1994.

2. Vysotsky MS and other Trucks, 1979.

3. USSR author's certificate N1093596, CL 62 D 7/18, 1984, publ. (prototype).

1. Steering axle of a wheeled vehicle steering system including a beam steering knuckles with wheels, pivot connection, turning parts, all specifications reference the data pad, rigidly connected with the beam, steering wheel, steering column, steering mechanism, characterized in that on the unsprung part of the fixed working cylinders, hinge mounted between a beam bridge and swinging fists, interacting directly with castors, between the stub-axle pivotally mounted transverse thrust with permanent fixed length, transfer effort when turning the steering wheel, and on the sprung part of the installed steering mechanism, which performs the distribution of the working fluid in the working cylinders by converting the rotational motion of the steering wheel with the steering column in the translational motion of the nut spool having a longitudinal guides are available in parallel shaft the steering column.

2. Steering axle according to claim 1, characterized in that on the outer surface of the nut of the valve with the two parties in the sectors adjacent to the input macroprolactinoma passage grooves with variable depth of the undercut, to ensure a smooth flow of the working fluid from the pump to the working cylinders.

3. Steering axle according to claim 1, wherein the set at a given angle sloping platform on which the two sides obkatyvalisj, for example, tapered rollers, magic cube MOV and vehicle cornering, through the rise of the respective sides of the front of the sprung portion and providing increased stability and stabilization when driving straight and turning.

4. Steering axle according to claim 1, characterized in that the working cylinders are mounted on the unsprung part, providing damping of shock loads from the steering wheel.



 

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FIELD: transport engineering.

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