41results about How to "Damping force adjustment" patented technology

The invention relates to a technology of a novel structure of a semi-active damping-adjustable vibration absorber for suspension of automobiles, locomotives and rolling stocks. The vibration absorber comprises two end part connecting rings, a piston rod, a sealing and guiding device, a cylinder body, a vibration absorber cover in threaded connection with the cylinder body, a piston valve assembly and a bottom valve assembly, and also comprises a tensile unloading electromagnetic valve assembly embedded in the piston valve assembly and the piston rod, a compression unloading electromagnetic valve assembly embedded in the bottom of the bottom valve assembly, and an external high-pressure small oil chamber arranged in a lug boss and provided with a master control valve assembly and a safety valve assembly; and the tensile unloading electromagnetic valve assembly, the compression unloading electromagnetic valve assembly and the master control valve assembly are controlled by a controller. By the vibration absorber, the magnitude and the direction of a damping force can be controlled without the relative speed for auxiliary judgment, and both the unloading control related to movement and the control of the magnitude of the damping force are provided.

The present invention is cylinder induction type self sensing method and system for MR damper. One induction coil is wound onto the cylinder of single-cylinder piston type MR damper and excited with the harmonic magnetic field of the exciting coil wound on the piston head of the MR damper to output information of relative displacement state between the piston rod and the cylinder, and this constitute the basic structure of cylinder induction type integrated relative displacement sensor. One active magnetoelectric relative displacement sensor is integrated to the MR damper structure to realize the real-time detection of relative displacement information between the controlled target and the supporting body. The continuous damping force controlling characteristic of magnetic reological fluid damper is combined to make the semi-active damping system of MR damper possess continuously controllable self sensing and damping force.

The invention discloses a magneto-rheological damper with unidirectional damping property, and relates to the technical field of devices for adjusting damping property by changing fluid viscosity. The magneto-rheological damper comprises a damping cylinder, a unidirectional damping piston assembly, a coil assembly, a piston rod and magneto-rheological liquid, wherein the unidirectional damping piston assembly comprises a damping piston, a spring sheet and a gasket; a first annular through hole and a second annular through hole are formed in the damping piston; a magneto-rheological fluid passage is arranged on the coil assembly and is communicated with the first annular through hole, and the coil assembly does not cover the second annular through hole. The magneto-rheological damper has the advantages that when the damping piston moves up, the spring sheet seals the second annular through hole, the magneto-rheological fluid only passes through the magneto-rheological liquid passage under the action of a magnetic field, and the damping force can be adjusted by adjusting the intensity of the magnetic field; when the damping piston moves down, the second annular through hole is opened under the action of no magnetic field, and the produced damping force is little, so that the unidirectional damping property of the magneto-rheological damper is realized.

The invention provides concrete pumping equipment and an arm-support-vibration semi-active control device and an arm-support-vibration semi-active control method thereof. The arm-support-vibration semi-active control device comprises a plurality of sections of arm supports (10) and extension mechanisms (20) connected between two adjacent sections of arm supports (10). The arm-support-vibration semi-active control device further comprises changing dampers arranged at the extension ends or fixed ends of the extension mechanisms (20) in series connection mode, sensors arranged on the arm supports (10) and controllers (40) connected with the sensors. Signal output ends of the controllers (40) are connected with the changing dampers to control damping force of the changing dampers, and the changing dampers exert damping force in the reversed direction with the vibration direction of the arm supports (10) on the arm supports (10). The arm-support-vibration semi-active control device can not only passively play the roles of damping, energy consumption and vibration reduction, but also actively play the roles of vibration control, thereby being good in control effect on arm support vibration, simple in structure and flexible and convenient to use.

The invention discloses a magnetorheological damper with a multi-piece piston and a single rod. The magnetorheological damper consists of a working cylinder, an external electromagnet, a compensating air bag, the multi-piece piston and a piston rod, wherein the multi-piece piston consists of three or more groups of dynamic pieces; each group of dynamic piece has a circular ring form, and consistsof a strip flat plate which has a round hole in the center and two semicircular arc flat plates; the circular ring form is formed by respectively connecting one semicircular arc flat plate to one of two parallel straight edges of the strip flat plate which has the round hole in the center by a hinge; the outer diameters of the dynamic pieces are smaller than the inner diameter of the working cylinder; the flowing gaps of magnetorheological liquid are left; the groups of dynamic pieces of the multi-piece piston are fixed at one end of the piston rod at certain intervals through the round holeson the dynamic pieces; the other end of the piston rod is stretched out of the working cylinder through a sealing device and a bearing on the end face of the working cylinder; the compensating air bag is arranged at the bottom in the working cylinder; the external electromagnet is fixed on the external circumference of the working cylinder; the working cylinder is made of a magnetically-nonconductive material; and the magnetorheological liquid is fully filled in the working cylinder.

The invention relates to a terrain self-adaptive biomimetic ankle device comprising a crus dry interface seat, a hydraulic cylinder connecting sleeve and a rotary micro hydraulic cylinder; liquid cylinder sealing plates are arranged on two sides of the rotary micro hydraulic cylinder; oil liquid is filled in the rotary micro hydraulic cylinder; an inner cavity of the rotary micro hydraulic cylinder is a sectional main chamber; the middle at the lower end of the sectional main chamber is connected with a piston rotating shaft fixedly connected with a rotary hydraulic piston by which the sectional main chamber is divided into a left chamber and a right chamber; the left chamber and the right chamber are respectively communicated with a plantar flexion pipeline and a dorsal flexure pipeline; and a plantar flexion damping system and a dorsal flexure damping system which are arranged at the bottom of the rotary micro hydraulic cylinder are respectively arranged in the plantar flexion pipeline and the dorsal flexure pipeline. The human ankle rotation can be simulated by using the rotary hydraulic piston to rotate in the hydraulic cylinder round a rotating center; meanwhile, the stability of the ankle at any angle can be kept by using a damping force generated by the flowing of oil liquid between the left chamber and the right chamber through a needle valve.

The invention relates to a hydraulic variable-damping self-adaptive buffer device, in particular to an impact load self-adaptive buffer device. The device comprises an air storage barrel and a bufferbarrel. The air storage barrel is arranged in the buffer barrel in a sealed mode, a piston is arranged in the air storage barrel, a cavity I is formed by one side of the piston and the air storage barrel, a piston rod is arranged on the other side of the piston, and one end of the piston rod stretches out of the air storage barrel. A floating piston is arranged between the air storage barrel and the buffer barrel, the floating piston divides a cavity between the air storage barrel and the buffer barrel into a cavity II and a cavity III, a buffer valve and a rest valve are arranged between theair storage barrel and the buffer barrel, the opening of the buffer valve is adjusted through a buffer valve adjusting device, the opening of the reset valve is adjusted through a reset valve adjusting device, the buffer valve and the reset valve are communicated with the cavity I respectively, a liquid injection device communicated with the exterior is arranged on the cavity I, the cavity II is communicated with a liquid flow hole in the buffer valve, a small liquid flow hole is formed between the cavity II and the cavity I, and an air injection device communicated with the cavity III is arranged on the buffer barrel.

The invention provides an automobile damping device, belongs to the technical field of damping, and solves the problems that performances of a damper cannot be flexibly regulated and temperature of an oil liquid rises quickly during frequent vibration. The automobile damping device comprises a piston hydraulic damper, wherein the bottom of a cavity of the piston hydraulic damper communicates with a liquid inlet end opening of a Tesla turbine; the upper part of the cavity of the piton hydraulic damper communicates with a liquid outlet end opening of the Tesla turbine; one end of a turbine shaft of the Tesla turbine is connected to a motor; and fan blades are arranged on a turbine shaft at the other end. According to the automobile damping device provided by the invention, the damper is combined with the Tesla turbine, so that regulation on damping force of the damper can be realized through rotation of the motor; and the fan blades are arranged on the Tesla turbine, so that the oil liquid can be cooled by utilizing vibrating energy of the damper.

The invention discloses a magnetorheological damper with a float ring and double outlet rods. The magnetorheological damper comprises a working cylinder, the float ring, a piston, two piston rods and an external electromagnet. End covers are fixed to two ends of the cylindrical working cylinder; a plurality of identical annular discs are fixed onto the same core column to form the piston, and excitation coils are wound in annular gaps among the various annular discs of the piston; the piston is mounted in the working cylinder, and magnetorheological fluid flowing gaps are reserved between the outer peripheral wall of the piston and the inner peripheral wall of the float ring and between the outer peripheral wall of the float ring and the inner peripheral wall of the working cylinder; one ends of the two piston rods are respectively fixed to two ends of the piston, and the other ends of the two piston rods extend out of the two ends of the working cylinder via sealing devices and sliding bearings on the two end covers of the working cylinder; the gaps in the working cylinder, between the inner peripheral wall of the float ring and the outer peripheral wall of the piston and between the outer peripheral wall of the float ring and the inner peripheral wall of the working cylinder are filled with magnetorheological fluid; the external electromagnet is fixed onto the outer circumference of the working cylinder.

The invention discloses a small viscous damper which comprises a damping box body, a connection plate and shearing plates, wherein the top of the damping box body is provided with an opening, the bottom of the damping box body is provided with a connection bottom plate connected with a lower layer building structure, a plurality of adjustable baffles are inserted on the two sides of the inner wall of the damper, a plurality of shearing areas which are vertically arranged can be formed on the two sides of the interior of the damping box body, and the shearing areas are filled with damping filler; the upper end of the connection plate is provided with a connection top plate connected with the upper layer building structure, and the lower end of the connection plate penetrates through the opening and is inserted into the damping box body; the first end of each shearing plate is connected with the connection plate, and the second end of each shearing plate is inserted into the damping filler in the shearing areas. According to the small viscous damper, multiple layers of the shearing plates are inserted into the damping box body through the connection plate, multiple layers of shearing faces are formed, and larger damping force is guaranteed under the situation that the appearance size of the damper is reduced.

The invention relates to an adjustable damping shock absorber. The shock absorber can be suitable for various vehicle suspensions or seats by manually adjusting damping. The adjustable damping shock absorber comprises a hoisting ring, a work cylinder, an oil storage cylinder, a middle cylinder, a guide base, an oil seal, a piston rod, a bottom valve assembly and a piston assembly. The adjustable damping shock absorber is characterized by further comprising a valve body, a valve element and a rotary arm, the valve body is assembled on the oil storage cylinder, the valve element and the rotary arm are assembled together, and the rotating action of the rotary arm is controlled by a driver. The shock absorber is simple and reliable in structure and low in cost, the damping force of the shock absorber can be easily adjusted according to the requirements of the driver, and therefore the vehicle comfort is improved.

A variable damping force damper is configured so that a piston assembly, which is housed within a cylinder in a slidable manner and which divides the cylinder into an upper hydraulic chamber and a lower hydraulic chamber, is configured so as to include: a piston body (18) which has valve holes (18a) through which hydraulic oil flows between the upper hydraulic chamber and the lower hydraulic chamber; and a laminated valve (20) which opens and closes the valve holes (18a). The variable damping force damper is characterized in that the laminated valve (20) has an outer peripheral section (20b) and opening/closing sections (20a), the opening/closing sections (20a) being extended from the outer peripheral section (20b) toward the center of the laminated valve (20) and opening and closing the valve holes (18a), the opening/closing sections (20a) being each configured in such a manner that the distance (L1) measured from the point (P1) of application, to which the pressure of the hydraulic oil flowing through the valve holes (18a) is applied, to the outer peripheral section (20b) measured along the opening/closing section (20a) is greater than a distance (L2) corresponding to the distance from the point (P1) of application to the outer peripheral section (20b).

The invention discloses an automobile suspension bushing and an automobile. The automobile suspension bushing comprises an inner sleeve, a rubber main body, an outer sleeve and a mounting bracket, wherein two hydraulic cavities filled with magnetorheological fluid are formed in the rubber main body; an upper flow channel and a lower flow channel are arranged on the rubber main body at an interval,and the upper flow channel and the lower flow channel are respectively communicated with the two hydraulic cavities; the magnetorheological fluid can flow between the two hydraulic cavities; and an electromagnetic coil capable of providing a variable magnetic field for the magnetorheological fluid is arranged on the outer sleeve. According to the automobile suspension bushing and the automobile,the damping performance of the automobile suspension bushing can be actively controlled and adjusted in real time, so that under different automobile conditions, the damping characteristic more suitable for the automobile conditions can be obtained through control of the trip computer and the current adjusting unit, and therefore better whole automobile controllability and comfort performance areprovided, and driving quality is improved.

In a caster which supports a wheel by using via a link 3 a bracket 2 to be fitted to a wheelchair or the like, an end of the link 3 is connected with a rotation axis of the bracket 2 via a rubber member 8 which is twisted and deformed resulting from oscillating motion of the link 3, and the link 3 and the bracket 2 are connected by a hydraulic damper 20 which damps the oscillating motion of the link 3, whereby an oscillation or a shock can be absorbed.