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

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.

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 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 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 relates to the technical field of automobile parts, and discloses a steel plate spring suspension. The suspension comprises a plate spring, a first support and a second support; the first support and the second support are arranged at the two ends of the plate spring, and the plate spring comprises a first spring steel plate and a second spring steel plate which are stacked up and down and connected with each other. The position, close to the first support, of the first spring steel plate is provided with an upwards-arched arch-shaped section, so that a distance is formed between the arch-shaped section and the second spring steel plate. According to the steel plate spring suspension, resonance with an automobile can be reduced, and comfort is improved; the steel plate spring suspension system can have the characteristic of variable stiffness; compared with the prior art, larger external force can be borne and buffered.

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.