35results about How to "With variable stiffness" patented technology

The invention discloses a suspension, and belongs to the technical field of auto parts. The suspension comprises a first magnetic element (1), a second magnetic element (2) which is arranged above the first magnetic element (1) and an elastic air cavity which is arranged between the two magnetic elements. The elastic air cavity is full of air. Magnetism of one sides of the first magnetic element (1) and the second magnetic element (2) is the same, wherein the sides of the first magnetic element (1) and the second magnetic element (2) are opposite. Generality of magnetic levitation suspension and air suspension is combined, the shortcoming that the magnetic levitation suspension is smaller in provided carrying capacity is made up through elastic effects of closed air and the air cavity in the suspension, and compared with the air suspension, the suspension is simpler in structure and is easy to achieve. The suspension has variable stiffness and variable damper features of the magnetic levitation suspension and the air suspension, is good in damping effects, and especially isolates high-frequency vibration better.

The invention refers to a super-elasticity shape memory alloy compound friction damper. It is a alter severity damper which can decrease the structure bounce. A inside slide bar and four outside slide bars are enlaced together according to concave contact face is joggled to the convex contact face each other by super-elasticity shape memory alloy thread, which is form to the main body of damper actualize all of the function. Then the main body is equipped in the exterior structure which is made up of front cover, rear cover and exterior structure. At last left coupling bar is connected to the front cover of the exterior structure, and right coupling bar is connected to the inside slide bar of the main body.

A dish type core layer sandwich plate and the use thereof, the plate includes an upper surface layer, a lower surface layer and a core layer and is characterized in that the core layer is a dish type bubble-cap shape core plate, the section of the core plate is cone platform type dish type bubble-cap structure form, each dish type bubble-cap forms a dish member, the dish members are symmetric and parallel in distribution in dot array mode, and the cone platform heart part of the cone dish type bubble-cap can be sharp top shape, flat top shape and annular top shape. The dish member formed by calendering is distributed with two symmetric outer convex inner concave bubble-caps choosing the core layer surface as center to form a spatial two staged unit combination structure. By decorating the cone dish type bubble-cap, the cone platform structure with W type, WV type and WU type sections can be formed. The formed composite board structure can be single layer or multi-layer structure, can use the directionality of the unit structure and adapts apposition, folding and mixture multiple layer spatial combinations. The plate is used for manufacturing the industrial products having the object of press resistance, buffer, vibration insulation, sound isolation, heat insulation, and heat preservation.

The invention relates to a rubber spring bumper seat which can be used in vehicle, comprising: a headrest (1), a backrest (2), a regulating knob (3), and an upper connection soleplate (5) of cushion (4). Wherein, the headrest (1) is connected to the upper part of backrest (2) whose lower part is connected to the upper connection soleplate (5) via the regulating knob (3); the cushion (4) is on the upper connection soleplate (5) under which a guide pole (9) is mounted; the upper end of guide pole (9) is mounted under the upper connection soleplate (5) via the clamp nut (10); the guide muffle (8) is mounted on the lower connection soleplate (7); the lower part of guide pole (9) inside the guide muffle (8) can slide freely; the rubber spring (6) is sheath outer the guide pole 99) while its upper end is connected to the upper connection soleplate (5) and its lower end is connected to the lower connection soleplate (7).

The invention discloses a magnetorheological elastomer grinding wheel and a preparation method thereof. The magnetorheological elastomer grinding wheel is characterized in that a grinding wheel body comprises non-magnetic micro-powder abrasive particles and a magnetorheological elastomer binding agent, and a magnetorheological elastomer is composed of ferromagnetic particles, a rubber base body and additives. The preparation process of the grinding wheel mainly comprises the steps of material mixing, mold filling, magnetizing, compression molding, deep solidification and cooling demolding, andthe prepared grinding wheel has the variable stiffness characteristic of the magnetorheological elastomer. The magnetorheological elastomer grinding wheel and the preparation method thereof have theadvantages that the binding agent of the grinding wheel is an intelligent material, the preparation process is mature, the flexibility of the grinding wheel can be controlled by using a magnetic fieldin engineering application to improve self-adaptation of the grinding wheel to the workpiece face type and contact force, the machining efficiency can be improved, the surface loss of a workpiece isreduced, and the magnetorheological elastomer grinding wheel and the preparation method thereof are suitable for high-precision machining of micro aspherical surfaces and micro complex curved surfacesand the like.

The invention provides a strengthened coating on the surface of a transmission component of an agricultural machine. The strengthened coating comprises the following raw materials in parts by weight:10-13.5 parts of high entropy alloy powder, 31-40 parts of hard alloy powder, and 46.5-59 parts of shape memory alloy powder. A preparing method comprises the following specific preparing steps of atfirst, separately grinding the nickel-base high entropy alloy powder, the hard alloy powder and the shape memory alloy powder in fine powders by a ball grinding mill; and then mixing the three alloy fine powders, adding an organic binding agent, sufficiently and uniformly mixing at a room temperature, smearing and heating, thereby obtaining the strengthened coating. The high entropy alloy powder,the hard alloy powder and the shape memory alloy powder are smashed, and are uniformly bound together by the organic binding agent, wherein the hardness of high entropy alloy and the hardness of hardalloy are higher, the high entropy alloy and the hard alloy are mainly used for improving the wear resistance of the transmission component of the agricultural machine, however the shape memory alloyis added to facilitate improving the toughness of the coating and prevent brittle rupture and falling of the coating due to too hard high entropy alloy and hard alloy, so that the service life of thetransmission component of the agricultural machine is effectively prolonged.

The invention discloses a stacked paper folding structure with variable stiffness characteristics, which comprises a plurality of layers of paper folding tubes stacked up and down, each paper foldingtube comprises two symmetrically arranged paper folding plates, each paper folding plate comprises a plurality of basic units, the basic units are connected in sequence, each basic unit comprises n small planes and two large planes, n is an even number greater than 2, the width ratio of the large plane to the small plane is n / 2, and the large plane and the small plane are parallelograms. Due to the fact that all layers of paper folding pipes of the stacked paper folding structure are different in rigidity, when the stacked paper folding structure is subjected to compression force from top to bottom, the stacked paper folding structure generates a layer-by-layer progressive buckling instability process, firstly, the paper folding pipe with the minimum rigidity is subjected to buckling instability, and then the paper folding pipe with the second small rigidity is triggered to be subjected to buckling instability; therefore, the paper folding pipe with the maximum rigidity is obtained through recursion, and then the variable rigidity characteristic of the stacked paper folding structure is achieved. According to specific requirements, multiple layers of paper folding pipes with different rigidities can be stacked, and multiple variable stiffness characteristics are achieved.

The invention discloses a multi-directional laminated variable-stiffness shape memory alloy damper and a mounting method thereof. A plurality of damper intermediate plates are laminated between a damper top plate and a damper bottom plate to form the damper of a cylindrical structure, and shape memory alloy wires are horizontally and symmetrically arranged between any vertically adjacent laminatedplates. The multi-directional laminated variable-stiffness shape memory alloy damper and the mounting method thereof have the advantages that the problems of smaller stroke, poor reset performance, poor durability, poor high and low temperature resistance and the like of an existing damper are solved, the structure is simple, the installation is convenient, and the multi-directional laminated variable-stiffness shape memory alloy damper can be widely applied to passive control over structures in the technical field of civil engineering and effectively reduces the vibration of structures or components and the residual deformation after strong vibration.

The invention discloses a terrain-imitating cutting table for a sugarcane harvester. The cutting table comprises a harvester body and a cutting table assembly, wherein the cutting table assembly comprises a cutting part, a control part and a power part; the power part comprises a hydraulic motor and a hydraulic motor base; the hydraulic motor is arranged on the hydraulic motor base; the cutting part comprises a cutter head and a cutting blade, wherein the cutter head is mounted under the hydraulic motor base, and a base is arranged at the bottom of the cutter head and is hemispherical; the control part comprises a swinging arm, an air spring and a swinging limiting seat, wherein a lower swinging arm pin is arranged at the lower end of the swinging arm, and the other end of the lower swinging arm pin is connected with a movable pin of the hydraulic motor base; an upper swinging arm pin is arranged at the upper end of the swinging arm, and the other end of the upper swinging arm pin is connected with a movable pin on a suspension fork of the harvester body; and the swinging limiting seat is mounted at the upper end of the swinging arm, and the air spring is connected with the swinging arm through the swinging limiting seat. The terrain-imitating cutting table disclosed by the invention adopts a unique terrain imitating technique for harvesting sugarcane.

The invention relates to a variable-rigidity leaf spring crossed type balanced suspension. The variable-rigidity balanced suspension comprises a front axle, a rear axle, a front leaf spring, a rear leaf spring, a frame, an absorber, U-shaped bolts, a front spring lifting lug, a balance arm support and a rear spring lifting lug. The variable-rigidity leaf spring crossed type balanced suspension is characterized by further comprising a composite leaf spring type balance arm; the composite leaf spring type balance arm comprises a main leaf spring, an assistant leaf spring and a leaf spring clamp; the assistant leaf spring is arranged on the main leaf spring though the leaf spring clamp; the leaf spring clamp is hinged to the balance arm support. The variable-rigidity leaf spring crossed type balanced suspension is applied to a multi-axle vehicle, eccentric wear of tyres is decreased under the condition that axle base is decreased as much as possible, stress of the frame is more uniform, and self weight is reduced; meanwhile, the design flexibility is improved due to the fact that the rigidity of the balance arm is variable, and the ride comfort of the vehicle under different loads is improved.

The invention provides a swing device which connects a truck bogie bolster with a side frame through a spherical hinge. A swing seat is connected with the bolster through the interference fit between a column and a hole; the concave sphere of the swing seat and the positioning half ball of the side frame are matched to play a role of load transmission. The swing seat is internally provided with a wearable liner. When the side frame swings, the bolster rotates corresponding to the side frame and provides friction moment. The swing device can effectively release the transverse motion of the bolster, meanwhile, the friction moment of the bolster can be changed correspondingly along with the changes of the loads of empty and heavy vehicles; the invention is equivalent to a transverse variable friction damper and effectively meets the requirement that different transverse damps are needed by the empty vehicle and heavy vehicle ; the invention leads the bogie to have the characteristic of variable rigidity, thus improving the critical speed and transverse kinetic performance of the vehicle. The invention improves the kinetic performance of vehicles, enhances the operation quality of vehicles, reduces the maintenance cost of vehicles, meets the requirement of heavy load and fast truck of the rail development, and has better social benefits and economic benefits.

The invention provides an auxiliary spring device used for a hydraulic bushing, wherein the hydraulic bushing comprises a core shaft, sleeve-shaped flow channel bodies formed in the core shaft in a sleeved manner, and outer sleeves tightly arranged on the radial outer sides of the flow channel bodies in a sleeved manner; the auxiliary spring device comprises supporting rings which are formed in the core shaft and is positioned on the axial outer sides of the flow channel bodies; the supporting rings are configured to auxiliary liquid cavities which are used for containing hydraulic liquid andare cooperatively defined with the outer sleeves; and the supporting rings further comprise radial projections inside the auxiliary liquid cavities, the radial projections are in sealing contact withthe inner surfaces of the outer sleeves, so that the auxiliary liquid cavities are divided into first sub-cavities on the outer sides of the axial direction and second sub-cavities on the inner sidesof the axial direction.

The invention discloses a mining vehicle hydro-pneumatic spring rear suspension system. The mining vehicle hydro-pneumatic spring rear suspension system comprises a vehicle frame and a suspension mechanism mounted on a vehicle axle. The suspension mechanism is mounted on the vehicle frame and comprises four hydro-pneumatic springs, two high-low pressure energy accumulators and a guiding mechanism.The four hydro-pneumatic springs are arranged at the two ends of an intermediate axle and a rear axle correspondingly and connected with the high-low pressure energy accumulators through oil pipes. Variation of the empty load and the full load is achieved through variation of the oil pressure; the hydro-pneumatic springs bear the vertical load; the hydro-pneumatic springs on the intermediate axleand the rear axle are inter-linked through oil pipes, and the function that a suspension is balanced is achieved; a guiding mechanism is mounted in the vehicle frame; and by means of the mining vehicle hydro-pneumatic spring rear suspension system, the problems that in the prior art, a vehicle is low in bearing capacity and comfort level, and the service life of the vehicle is short are solved.

A double-headed arrow type negative poisson ratio structural body relates to the structural body field of space lattice structures, and includes a double-headed arrow type negative poisson ratio structural unit, wherein the double-headed arrow type negative poisson ratio structural unit includes an upper cross beam, a lower cross beam, a first upper diagonal bar, a second upper diagonal bar, a first lower diagonal bar, a second lower diagonal bar, a first middle diagonal bar and a second middle diagonal bar; a first upper connecting base, a second upper connecting base, a first lower connecting base and a second lower connecting base are respectively arranged at the lower ends of the first upper diagonal bar, the second upper diagonal bar, the first lower diagonal bar and the second lowerdiagonal bar, so as to form the double-headed arrow type negative poisson ratio structural unit; in space, the double-headed arrow type negative poisson ratio structural unit adopt the first upper connecting base, the second upper connecting base, the first lower connecting base, the second lower connecting base, the upper cross beam and the lower cross beam as connecting pieces for combined connection to form the double-headed arrow type negative poisson ratio structural body with the stereostructure. The double-headed arrow type negative poisson ratio structural body has the advantages of simple structure, high stability, light weight in unit space, high compression resistance, high impact resistance, and the like.

The invention provides a deformable self-connecting self-repairing pipeline, and relates to the technical field of pipelines. The pipeline is made from a shape memory material, and a microcapsule structure is embedded in the shape memory material; the pipeline comprises at least two shaping parts and a deformation part, wherein the deformation part is arranged between the two shaping parts, and atriggering part is arranged on the inner wall of the end part of the pipeline. Compared with the prior art, the deformable self-connecting self-repairing pipeline has the properties of low density, high strength, corrosion resistance, fatigue resistance and the like, and further has the characteristics of variable rigidity, self-repairing and self-connection, namely the pipeline can be deformed and bent under external driving conditions, can be connected without other parts, can be automatically repaired the damaged parts, and is convenient to install, replace and maintain.

The invention provides a hydraulic bushing, comprising: a mandrel; a first runner member sleeving the mandrel and in sleeve shape, wherein a gap between the mandrel and the first runner member is filled with first rubber, the outer surface of the first runner member is provided with a first runner for a hydraulic fluid, the first rubber is radially oppositely provided with two main fluid cavitiesto hold the hydraulic fluid, and the two main fluid cavities are communicated with each other via the first runner; an outer sleeve that sleeves the first runner member radially in compressing manner;a sealing component arranged on the at least one axial outer side of the first runner member, wherein the sealing component and the outer sleeve jointly define an auxiliary fluid cavity to hold the hydraulic fluid. The sealing component includes a support ring sleeving the mandrel; the support ring includes a radial protrusion inside the auxiliary fluid cavity; the radial protrusion is in hermetic contact with the inner surface of the outer sleeve so that the auxiliary fluid cavity is divided into a first sub-cavity on the axial outer side and a second sub-cavity on the axial inner side.

The invention particularly relates to a steam generator primary side high-water-level closure plate sealing assembly. The sealing assembly comprises a sealing assembly body, a reinforcing rib, a first sealing line and a second sealing line, wherein the reinforcing rib, the first sealing line and the second sealing line are sequentially arranged on the inner wall surface of the sealing assembly body from inside to outside in the circumferential direction at intervals; and a super-elastic memory alloy ring is embedded in the reinforcing rib. The steam generator primary side high-water-level closure plate sealing assembly has the characteristic of variable stiffness and meets the requirements for folding and unfolding in the plugging work of a steam generator primary side main pipe opening.

The invention discloses an elastic coupling based on a woven spiral spring net surface. The elastic coupling comprises a half coupling A and a half coupling B which are detachably mounted on two shaft rods respectively, the half coupling A and the half coupling B are elastically connected through the woven spiral spring net surface, and the woven spiral spring net surface is of a cylindrical structure. The woven spring net surface has the variable stiffness characteristic and can bear large load variables, transmission impact force is absorbed after deformation of the woven spring net surface, torsional vibration is reduced, and stability of power transmission is guaranteed. The elastic coupling has good damping and buffering performance in the axial direction and can bear large axial vibration impact; good inter-axis radial, axial and angular offset compensation performance is achieved, inter-axis power transmission with a certain intersection angle is achieved, and a universal coupling is replaced; and the elastic coupling is simple in structure, low in cost, convenient and reliable to install, free of lubrication and maintenance, resistant to high and low temperatures and good in extreme environment adaptability. The elastic coupling based on the woven spiral spring net surface is suitable for the technical field of couplings.

The invention provides an electric connector which comprises two contact points, two insulating shells and a disk spring, wherein both the longitudinal sections of the two contact points are T-shaped, each contact point comprises a contact and a fixed rod which are mutually connected, the disk spring and one contact point are installed in one insulating shell, the disk spring is sleeved on the fixed rod of the contact point, the free end of the fixed rod of the contact point extends out of the insulating shell, and a snap ring is arranged at the free end, so that the free end only can move towards the direction far away from the insulating shell; the other contact point is fixed in the other insulating shell, the insulating shell comprises an outer insulating shell and an inner insulatingshell, perforated holes are arranged on the outer insulating shell and the inner insulating shell, the fixed rod of the contact point penetrates through the perforated holes, the free end of the fixed rod of the contact point extends out of the inner insulating shell, and a clamping firmware is arranged at the free end. The electric connector of the invention has the advantages of simple structure, low requirement for positioning precision and small occupied space.

The invention discloses a magnetic liquid metal preparation method, a micro gripper and a clamping method. The magnetic liquid metal preparation method comprises the following steps that (1) liquid metal with the weight part being A is taken and put into a container; (2) metal powder with the weight part being B is taken and put into the container; (3) an acid solution is added into the container till the liquid metal and the metal powder are submerged; (4) stirring is performed until the liquid metal and the metal powder are fully mixed; and (5) water is added to clean the acid solution so as to remove the acid solution to obtain magnetic liquid metal. The preparation method has the following beneficial effects that viscosity and rigidity of the prepared magnetic liquid metal can quickly respond to stimulation of an applied magnetic field, and the magnetic liquid metal has reversible change from liquid to semisolid or solid. By changing the magnetic field intensity, the Young modulus can be adjusted from the kPa level to the MPa level, and when the iron density in the LMMS is higher, the GPa level can be achieved. Therefore, the magnetic liquid metal has the characteristics of magnetic controllability and variable stiffness, and has infinite potential in the field of flexible robots.

The present invention provides a minimally invasive surgery system using a self-deployable flexible micro-manipulator and a control method thereof. The structure of the operating arm includes a foldable flexible micro-operating arm and a foldable surgical forceps; the flexible micro-operating arm is located at the end of the entire surgical system and penetrates deep into the surgical object, and its interior is connected to the rope-driven control mechanism through a rope structure; the rope-driven control The mechanism uses the motor to extend or shorten the rope inside the system to drive the deformation of the flexible micro-operating arm structure, so that the foldable surgical forceps can complete the surgical action. The structure of the surgical system proposed by the invention is convenient for miniaturization, and has functions such as driving, sensing, and variable stiffness. It solves the problems that traditional surgical robots are difficult to miniaturize and lack sensory feedback. The operating arm self-deploys after passing through a small wound, meeting the needs of minimally invasive surgery in a small space.

The invention discloses an air spring damping structure. The air spring damping structure is characterized in that the air spring damping structure comprises a damper body (1) and an air exhaust structure (9); the damper body (1) is provided with a fixing bolt (3); the fixing bolt (3) is fixedly connected with a base (7) through an air spring (2); the damper body (1) is connected with the air exhaust structure (9) through an air pipeline (8); an air inlet connector (5) is arranged on one side of the air exhaust structure (9) and the air pipeline (8); a height control valve (4) is arranged on the air exhaust structure (9), and the air exhaust structure (9) is fixedly connected with a connection rod (6).

The invention relates to a variable-stiffness leaf spring cross-type balance suspension. The variable-stiffness balance suspension comprises a front axle, a rear axle, a front leaf spring, a rear leaf spring, a vehicle frame, a shock absorber, a U-bolt, and a front spring hanger. The lug, the balance arm bracket and the rear spring lifting lug are characterized in that: it also includes a composite leaf spring type balance arm, and the composite leaf spring type balance arm includes a main plate spring, an auxiliary leaf spring and a leaf spring clip; the auxiliary plate The spring is arranged above the main spring through a leaf spring clip; the leaf spring clip is hinged with the balance arm bracket. The invention is used on multi-axle vehicles, and can reduce the eccentric wear of tires while reducing the wheelbase as much as possible, make the frame more evenly stressed, and reduce the self-weight. The flexibility of the design is improved, and the ride comfort of the vehicle under different loads is improved.

The invention discloses a multi-directional laminated variable-stiffness shape memory alloy damper and a mounting method thereof. A plurality of damper intermediate plates are laminated between a damper top plate and a damper bottom plate to form the damper of a cylindrical structure, and shape memory alloy wires are horizontally and symmetrically arranged between any vertically adjacent laminatedplates. The multi-directional laminated variable-stiffness shape memory alloy damper and the mounting method thereof have the advantages that the problems of smaller stroke, poor reset performance, poor durability, poor high and low temperature resistance and the like of an existing damper are solved, the structure is simple, the installation is convenient, and the multi-directional laminated variable-stiffness shape memory alloy damper can be widely applied to passive control over structures in the technical field of civil engineering and effectively reduces the vibration of structures or components and the residual deformation after strong vibration.

The invention discloses a magnetic stiffness-variable bearing spring device, which is composed of an upper spring bracket, a coil spring, a vibration damping bumper and a lower spring bracket; the vibration damping bumper is arranged inside the coil spring; the upper end of the vibration damping bumper is connected with the upper spring bracket; the lower end of the vibration damping bumper is connected with the lower spring bracket; the vibration damping bumper adjusts in real-time the stiffness characteristic of the bearing spring device by adopting the principle of homopolar repulsion of apermanent magnet; according to different structural styles of the vibration damping bumper, the style of the vibration damping bumper can be divided into an upper bracket style, a lower bracket styleand a two-way style. The bearing spring device has variable stiffness characteristic so that an automobile has a fairly good riding comfort under various loading situations; meanwhile, when the automobile drives on a bad road, the bearing spring device is capable of preventing a suspension system from colliding and protecting a part from early damage so as to improve the operational reliability of the suspension system; the spring installation fully utilizes the inner space of the coil spring, thereby having the advantages of simple structure and easy implementation.

The invention discloses a compact variable stiffness joint module with a flexible element, which is characterized in that a star gear reducer is arranged in a frameless torque motor unit, a driver outputs current to generate a variable magnetic field on a motor stator winding, and a motor outer rotor rotates under the action of the magnetic field; torque generated by the electromagnetic field is converted into input torque of the planetary gear reducer; an output flange mounted on the planetary gear reducer is further driven by the planetary gear reducer to follow up; further, the flexible element installed on the output flange synchronously rotates along with the output flange to generate deformation, torque is generated at the flexible element output hole, and the torque is transmitted to the flexible output flange through the flexible element output hole to drive an external load to move. According to the invention, variable stiffness can be realized, the functions of a biological rigid and flexible musculoskeletal system are effectively simulated, dynamic force interaction in an unknown environment can be allowed, and the reliability and safety of robot operation are improved.