Vehicle shock-absorber

FIELD: transport.

SUBSTANCE: invention relates to machine building. The shock-absorber includes cylinder, rod-piston, piston, three working cavities in each one of which there are internal and external springs with opposite direction of turns. The springs of each cavity are made with different tension. Cylinder has in each cavity one delivery and one drain hole. Delivery holes are connected by pipelines with electrically driven valves connected with delivery main line. The drain holes are connected by pipelines with adjustable throttles the outputs of which are connected into one main line attached to drain line via electrically driven valve. The electrically driven valves and adjustable throttles are assembled into valve and throttle units installed on the cylinder. Throttles and valves are controlled via data bus and signal amplifier unit by electronic control unit. The control unit receives signals from operating mode and various sensors selector.

EFFECT: wide range of shock-absorber characteristics adjustment, higher design reliability, manual and manual with automatic correction control of shock-absorber.

1 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: group of inventions relates to machine building. A shock absorber comprises a cylinder, a piston casing with compression and return channels, a piston rod. The first valve unit including the first valve disk and the second valve unit are engaged with the piston casing. A normally open valve receiving the piston travelling is connected to the piston rod and comprises the second valve disk. A shock absorber as per the second version additionally comprises a tube embracing the cylinder and forming a container chamber, and a base valve unit set between the working chamber and the container chamber. A shock absorber as per the seventh version additionally comprises the second piston with a channel engaged with the cylinder and set inside one of the working chambers. Other versions of a shock absorber are characterised by the location of the second valve disk.

EFFECT: faster action of valve units in a shock absorber.

66 cl, 14 dwg

FIELD: machine building.

SUBSTANCE: shock absorber includes an external tube-reservoir and a working cylinder, which form an annular cavity. A solid piston with a stock is arranged inside the working cylinder in a movable manner. There are through working openings in upper and lower parts of shock absorber walls. Bypass valves are installed at the bottom and the stock guide. There is a restricted closed cavity in the annular cavity, which attaches upper and lower working openings to the inlet cavity of the adjustable electromagnetic valve. A bypass valve is installed on the lower working opening. The valve gate is movably located on outer surface of the guide sleeve by means of a spring. A control gate pressed to the pusher with the spring is movably fixed on the inner surface of the guide sleeve. There are through segmented tangential slots made on side cylindrical surfaces of the guide sleeve, valve and control gates.

EFFECT: improving reliability and simplifying the design of shock absorber.

2 cl, 13 dwg

FIELD: machine building.

SUBSTANCE: inclination angle of relationship between resistance force modulus and deflection speed modulus of an elastic member is changed if current resistance force modulus differs from the specified value. The specified value of resistance force is changed depending on current deflection of the elastic member. The specified current value of resistance force is set so that it is directly proportional to modulus of current deflection of elasticity force, which is corrected to resistance force vector, of the elastic member of its static value. The device for implementing the method represents a hydraulic telescopic damper, in which the resistance force, the modulus of which depends on the modulus of deflection variation speed, is created during the suspension deflection variation. As per the first version, the damper includes a bar fixed at the compression chamber bottom. The bar has a four-sided variable cross-section in the working section of its length. At the damper compression, the bar is retracted into inner cavity of the stock. As per the second version, the damper includes two bars, as well as a compensating chamber that is separated from the compression chamber with a partition wall and partially filled with liquid. The bars are made in the form of a rotation body and installed inside the first and the second guide elements respectively with possibility of longitudinal movement.

EFFECT: preventing resonance, and minimising the resultant force acting on the under-spring mass of the transport vehicle.

17 cl, 10 dwg

FIELD: machine building.

SUBSTANCE: shock absorber includes an operating cylinder, inside which a piston with a hollow stock moved in the guide and covered with a cover plate from above is arranged in a movable manner. A limiting sleeve enclosing a stock is installed in the operating cylinder. Upper working through openings are made in lower part of the stock. A tube is rigidly and concentrically fixed inside the stock on the piston. A spring-loaded valve with through lower working openings is installed on lower tube end in a movable manner in axial direction. A closed cavity between a stock and the tube is connected via a pipeline to an inlet cavity of the controlled electromagnetic valve. Shock absorber includes a control unit, an accumulating tank and a controlled hydraulic differential valve with electromagnetic control. The inner tube cavity is connected to the outlet cavity of the electromagnetic valve. Through tangential openings (throttle and valve one) are made on the plunger and the sleeve. A bypass valve is arranged on side cylindrical surface of the tube.

EFFECT: improving reliability and simplifying the design of shock absorber.

11 dwg

FIELD: machine building.

SUBSTANCE: shock absorber includes an external tube-reservoir fixed in the stock guide and forming an annular cavity with a working cylinder. A piston with a stock is arranged inside the cylinder in movable manner. Upper and lower through working openings are made in the cylinder walls. Bypass valves are installed at the bottom of the cylinder and in the guide. Shock absorber includes a control unit and an adjustable electromagnetic valve of indirect action, which is installed in the tube-reservoir. Main valve pressed with a spring to the housing is arranged in the cavity of the main valve. Spring-loaded valve of direct action, which is rigidly connected to the electromagnet armature connected to the control unit, is arranged in the cavity of the control valve. A restricted closed cavity connecting an above-piston cavity through upper working opening to inlet cavity of electromagnetic valve is formed in annular cavity by means of a closed element. Below-piston cavity is connected via lower working opening through bypass valve to inlet cavity of electromagnetic valves, and annular cavity is connected to its outlet cavity.

EFFECT: improving reliability and simplifying the design of shock absorber.

10 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport. The system contains vertical hydraulic dampers installed under body. Each damper is made as piston pump with discharge and free-flow intercommunicating via throttle chambers for working fluid. The throttle is equipped with rod of variable cross-section with thrusts for end positions. Throttle rod movement drive is made as return spring and solenoid. Solenoid core is connected with throttle rod. Solenoid coils are attached to output terminals of control unit. Input terminals of control unit are connected with electric power source and oscillation frequency sensors installed on body in the area of each damper location. Control unit provides automatic change of end positions of throttle rod by solenoid electric power switching on or off according to indications of corresponding sensors of body vibration frequency.

EFFECT: design simplification and improvement of car movement smoothness.

3 cl, 1 dwg

FIELD: transport.

SUBSTANCE: damper comprises working cylinder, control unit and accumulation tank. Piston with hollow rod is arranged inside working cylinder to displace therein. Said rod is closed by cover with elements for attachment to vehicle. Indirect-action controlled solenoid valve comprises distribution chamber and serial inlet chamber, outlet annular chamber, gate chamber and that of control valve. Working cylinder top cylindrical part accommodates limiting bush surrounding said rod. Rod bottom section has through upper working openings. Tube with spring-loaded valve with through lower working openings arranged at its lower end, inside said rod in piston, and rigidly secured therein. Closed cavity between rod and tube at rod top is communicated with inlet chamber of said controlled solenoid valve while tube top is communicated with distribution chamber of said solenoid valve.

EFFECT: higher reliability, simplified design.

8 dwg

FIELD: transport.

SUBSTANCE: damper comprises external tube secured on rod guide, idle cylinder and working cylinder with piston secured on rod. Indirect-action controlled solenoid valve is arranged inside said tube. Valve inlet communicates with chamber composed by said working and idle cylinders. Valve outlet communicates with chamber made by idle cylinder and tube. Working cylinder piston and rod end chambers are communicated with chamber made by external tube and idle cylinder by means of bypass valves arranged in rod guide and base. Working cylinder walls have through working walls to communicate piston and rod end chambers with chamber made by working and idle cylinder. Bypass valve is arranged at lower working opening.

EFFECT: higher reliability, simplified design.

9 dwg

FIELD: machine building.

SUBSTANCE: damper comprises reservoir to accommodate viscous fluid. Web divides reservoir inner into two chambers. Opening made in web allows communication between said chambers via variable-cross-section adjustable duct. Said opening is provided with viscous fluid restrictor. The latter comprises adjustable duct shaping element with through hole arranged to displace linearly. Annular elastic element is arranged between shaping element face and web side surface. Seat comprises backrest, headrest, actuator and retainer. Unlocking appliance incorporates mechanism for converting load in rotation and mechanism incorporating said damper.

EFFECT: damper stiffness adjusted in response to impact force, adjustable headrest.

25 cl, 23 dwg

FIELD: machine building.

SUBSTANCE: pneumatic damper consists of case and hollow piston forming closed working volume for working medium and of fasteners of device or system. A free of fastening edge of the case is equipped with a device consisting of brake shoes and a drive pressing them at a proper moment to external surface of the hollow rod with required force. The first and the second additional closed volumes are communicated with working volume by means of valve units and are made as separate tanks of high and low pressure with devices of automatic inlet and outlet of working medium from closed working volume. A processor controls operation of devices for inlet and outlet and also operation of a drive of the brake shoes. By means of sensors the processor continuously tracks specified working parametres of the damper according to one or a rank of programmed damping characteristics. The tanks can be replaceable, while the processor is common for several dampers.

EFFECT: simplified design, upgraded quality of damping and reliable contact of vehicle wheel with road bed.

4 cl, 1 dwg

FIELD: transport.

SUBSTANCE: proposed damper comprises body, cylinder, rod with piston and extra piston to divide said cylinder to three chambers. Different-stiffness spring is fitted in every said chamber. Said chambers are communicated by pipelines via controlled throttles and solenoid valves. Pipeline is connected with feed main and discharge line. Throttles and valves are controlled by control unit in response to signals fed by the driver.

EFFECT: wider adjustment band, simplified design.

3 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: hydraulic shock absorber comprises a reservoir with an operating cylinder filled with a working fluid. Inside the cylinder there is a piston installed movably with valves. The piston is rigidly fixed on the stem interconnected with the protective jacket. The working cylinder and the protective jacket are made of diamagnetic material. The protective jacket contacts with its inner circular surface with the responsive surface of the working cylinder via a row of revolution solids. In the space between rows of solids of revolutions inside the specified protective jacket there is a ring rigidly fixed, made of a permanent magnet. The ring interacts with its magnetic field via an air gap and a wall of a working cylinder with a cylindrical circular generatrix surface of a magnetoconductive piston of a shock absorber.

EFFECT: increased reliability and simplified design of hydraulic shock absorbers.

3 dwg

FIELD: machine building.

SUBSTANCE: shock-absorbing device consists of an operating cylinder, in which two dividing pistons forming three operating chambers are located. There is one spring in each chamber. A nut of the operating cylinder, through which a stock passes, is screwed on both ends of the operating cylinder. One side of the stock is attached to the dividing piston to transfer forces to it, and its other side is provided with an eye lug for attachment to a car frame and a suspended lever. A stock cuff is installed between the stock and the nut of the operating cylinder. A high pressure pipeline, in which systems of compression and rebound valves and adjustable throttles are located, is provided from the upper operating chamber to the lower operating chamber. There is a branch between two adjustable throttles, which leads to the intermediate operating chamber. One more high pressure pipeline for supply of working liquid is connected to the upper and lower operating chambers, on each of which one control valve and one check valve is installed. One more pipeline is connected to the intermediate operating chamber for discharge of working liquid, on which a control valve and a check valve is installed as well.

EFFECT: wide range of change of elastic damping characteristics of the shock-absorbing device.

1 dwg

Damper // 2426921

FIELD: machine building.

SUBSTANCE: damper consists of cylinder 1 and of rod 2 with piston 3 installed in cylinder. Throttle 12 is installed in piston 3 and communicates above-piston 4 and sub-piston 5 cavities between them. The damper is equipped with safety valves of compression strokes 13 and rebound stroke 14 set in piston 3. Compensation chamber 15 is located in a lower part of cylinder 1. Inside upper ring 17 there is made groove 20 communicated with over-piston cavity 4 through back valve 8. Inside lower ring 18 there is made groove 21 communicated with sub-piston cavity 5 through back valve 9. Inside middle ring 19 there are made upper 22 and lower 23 grooves. Upper groove 22 of middle ring 19 is communicated with over-piston cavity 4 through orifices 6 in the middle part of cylinder 1 and is connected with groove 21 of lower ring 18 by means of left hydraulic valve 24. Lower groove 23 of middle ring 19 is communicated with sub-piston cavity 20 of upper ring 17 by means of right hydraulic valve 25.

EFFECT: simplified design and reduced dimensions and weight of damper at simultaneous raise of its vibro-protecting properties and reliability of operation.

3 dwg

Hydraulic damper // 2413887

FIELD: machine building.

SUBSTANCE: inside cylinder tube and hydraulic damper there are arranged inter-communicating piston cavity and controlled cavity. Both cavities are filled with oil in a pressurised state. Additionally, there is installed a piston travelling in axial direction in the piston cavity and a rod connected to the piston. A flexible element is installed in the control cavity in a position forming a reservoir in the control cavity by means of compression of oil with pressurising force; impact effect is damped so, that the flexible element is forced to elongate and contract when oil flows in/out of the reservoir due to travels of the rod.

EFFECT: simplicity and reduced dimension of design of hydraulic damper, retaining constant amount of oil in piston cavity.

10 cl, 3 dwg

Damper // 2408804

FIELD: machine building.

SUBSTANCE: damper consists of cylinder chamber filled with fluid, of piston installed inside cylinder chamber, of rod connected to piston and of accumulator. The accumulator facilitates generation of damping force produced by the piston rod due to fluid flow from the side of compression in the cylinder chamber. One coil of spiral damping groove is formed on internal periphery of the cylinder chamber within the ranges of piston stroke. Width of the damping groove is constant along its whole length. Depth of the damping groove is gradually diminishes along the spiral in the direction whereto the piston rod is pushed out. The length of the piston along axial line is less, than pitch of the damping groove.

EFFECT: simplified design and more efficient control of damping force of damper.

6 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: tuning to required damping frequency is performed. Dynamic rigidity or transfer factor dip is experimentally determined at first breadboard specimen. Then on increasing damper slit width, tuning frequency is increased along with increasing damping. Thereafter, tuning frequency is decreased by decreasing damper slit width. Aforesaid reduction is performed by increasing the number of slit pairs. Proposed device comprises interconnected pendulums pivoted to protected object. Each pendulum comprises weight suspended to aforesaid object. One object is located above the points of attachment of its suspension to the object, the others being located below aforesaid points. Tight cylindrical barrel is covered with cap and filled with hydraulic fluid. Movable modular hollow piston is arranged inside aforesaid cylindrical barrel fixed between two cylindrical springs. There is a system of channels inside aforesaid piston. It consists of top and bottom covers and uneven number of round plates. Aforesaid slits are formed by flat round rings arranged between aforesaid covers and plates. Former and latter comprise central bores, while even plates have peripheral orifices arranged nearby inner cylindrical surfaces of round rings.

EFFECT: higher efficiency.

2 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: single-pipe shock absorber comprises housing (1), piping hollow rod (3) with unmovable piston (5) that separates hydraulic space (A) into two compartments. Space (B) in the rod is connected with the hydraulic space through openings (7). The rod space receives flexible hollow balls (6) made of a flexible synthetic material. The shank of the rod is provided with screw (4) that bears balls to exclude cavitation at high speed of the working piston.

EFFECT: enhanced reliability.

1 dwg

Hydraulic damper // 2234013
The invention relates to the field of mechanical engineering

FIELD: machine building.

SUBSTANCE: shock absorber consists of a working cylinder, inside which a piston is installed, and a compensation chamber. The piston is made of two plates having ring-shaped slots to pass damping fluid with a gasket in-between. The slots in the plates are arranged so that the holes can be partially or completely closed at turning of the plates in respect to each other. A rebound valve and a compression valve with springs and weights fixed at the valve heads are installed in the piston. The upper piston plate can be turned in respect to the lower plate. The turn is carried out by the spring rigidly connected to a rod and a bush. In case of ambient air temperature changes, the spring changes its length and turns the upper plate in respect to the lower one. The compensation chamber is fitted by two pistons inside, one of them has a valve, the other one separates the working fluid and inert gas.

EFFECT: invention ensures good shock absorbing properties of a car suspension in the wide range of working temperatures and parts of mass fluctuations thus allowing for the decrease of impact loads on the units and load-bearing elements when riding on bumpy roads.

2 dwg

Hydraulic damper // 2536005

FIELD: machine building.

SUBSTANCE: invention relates to machine building. A hydraulic damper includes an operating cylinder, in which an arrangement is made for an elastic stock with a piston rigidly fixed on it and on its end face there are radial ribs and projections having passes bent at a right angle to the piston axis. On a vertical generatrix of the cylindrical surface of the piston there are slots of a similar shape. The slots are connected on one side to the passes arranged in walls of the operating cylinder throughout their height and connected both to its below-piston and above-piston cavities, and on the other side, they are connected to the passes located in the piston. Opposite ends of channels have an L-shape and are located with a gap relative to the ribs rigidly fixed on upper and lower end surfaces of the piston.

EFFECT: achieving enlargement of operating characteristics of hydraulic dampers.

3 dwg

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