9results about How to "Adjustable stiffness" patented technology

The invention discloses a tunnel-pile interaction experiment method and device based on a 3D printing technology, and belongs to the technical field of civil engineering underground structure tests. The method comprises the steps that the geometric and mechanical similarity ratio is determined according to an engineering prototype, a tunnel lining model and a pile group model are prepared through the 3D printing technology, and controllable adjustment of the rigidity of the tunnel model is achieved by adjusting the type, the filling rate and the internal structure of a printing material; controllable adjustment of the rigidity of the pile foundation model is realized by adjusting the size of the magnetic field; the model is placed in a soil body groove, the shield tunnel excavation process is simulated, and deformation data of a tunnel and a pile foundation are collected through a PIV technology and a sensor. Accurate control over the rigidity of the tunnel and pile foundation model is achieved through 3D printing, the influence of shield tunnel construction on the pile group foundation can be simulated under the condition that the similarity criterion is met, and the device has the advantages of being adjustable in structure, high in experiment efficiency and the like and can be used for researching a dense urban area tunnel-pile deformation coupling mechanism and optimizing related engineering parameters.

The utility model relates to the technical field of biomimetic robots, in particular to a tensegrity biomimetic robot which comprises a first pressing rod, a second pressing rod, a third pressing rod, a fourth pressing rod, a fifth pressing rod, a sixth pressing rod, a plurality of drivers and a controller, the controller is located in the middle of a geometry formed by the pressing rods and electrically connected with the drivers, and inhaul cable assemblies are further installed between the drivers. According to the bionic robot, various forms can be changed, and the adaptability of the bionic robot is improved.

The utility model provides a structure for suppressing bounce of a circuit breaker, and belongs to the technical field of high-voltage circuit breakers. Comprising an upper porcelain bottle, an upper outgoing line, an arc extinguish chamber, a lower outgoing line, a lower porcelain bottle and an insulating pull rod, and a bounce buffer suppression assembly is arranged between the upper porcelain bottle and the upper outgoing line and used for absorbing excess energy during switching-on and reducing switching-on bounce time. According to the utility model, the problem that the closing bounce time of the high-voltage circuit breaker exceeds the standard is solved, and on the premise that the mounting structure of the arc extinguish chamber is not changed, redundant energy during closing is absorbed and the closing bounce time is reduced by additionally arranging the bounce buffer suppression assembly on the wire outlet side under the condition that the over-travel of the arc extinguish chamber is not changed; the structure is simple, the reliability is high, the service life of the arc extinguish chamber is effectively prolonged, and the closing stability of the circuit breaker is improved.

The application relates to the technical field of robots, in particular to a one-body continuum manipulator for grabbing. The manipulator comprises a driving mechanism, a coupling manipulator arm body and a grabbing mechanism which are sequentially connected; the coupling manipulator arm body is provided with driving ropes which are circumferentially distributed; the coupling manipulator arm body comprises a flexible rod and a plurality of spherical friction bodies which are sleeved on the flexible rod; the plurality of spherical friction bodies are sequentially connected in a head-to-tail mode; a serpentine spring which is circumferentially distributed is arranged between adjacent spherical friction bodies; and the bottom of the coupling manipulator arm body is provided with an electromagnetic rigidity adjusting assembly which is used for adjusting the friction force of the plurality of spherical friction bodies to realize the rigidity adjustment of the coupling manipulator arm body. The one-body continuum manipulator for grabbing adopts the continuum joint of the coupling of the serpentine spring and the spherical friction body, realizes the rigidity adjustment, improves the load capacity under the condition of guaranteeing the flexibility.

The application discloses a high-voltage bushing transport adjustable damping type shock-absorbing support frame and relates to the technical field of high-voltage bushing transportation.The high-voltage bushing transport adjustable damping type shock-absorbing support frame comprises a support and a shock-absorbing component, each shock-absorbing component comprises a base, the base is supported on a mounting base surface, a spring seat, the spring seat is arranged above the base and fixed on the support, a coil spring, the coil spring is connected with the base and the spring seat at two ends respectively, and a damper, the damper comprises a pressure cylinder and a flow rate regulating valve, the pressure cylinder is arranged in the coil spring in a spaced mode, a cylinder body of the pressure cylinder is fixed on the base, a piston rod top end is fastened with the spring seat through locking pieces, and the flow rate regulating valve is installed on a fluid passage of the pressure cylinder to regulate the flow rate of fluid in and out of the pressure cylinder.Through the flow rate regulating valve, the flow rate of fluid in the pressure cylinder can be regulated, the rigidity of the pressure cylinder is further regulated, the damping size of the coil spring is regulated, different transportation conditions can be adapted, and the safety and stability of the high-voltage bushing transportation process are ensured.

This invention relates to the field of building structure technology, specifically to an anti-pull-out device. It includes an upper anchor, an upper sliding plate assembly, a hydraulic damper, a lower anti-pull-out assembly, a lower sliding plate assembly, and a lower anchor. The hydraulic damper's cylinder has an upper end cap sealed at one end and a lower end cap sealed at the other. A piston and a stiffness-adjustable medium are slidably disposed within the cylinder. An external pressure control component, capable of flowing from bottom to top, is embedded in the upper end cap, and a built-in pressure control component, capable of flowing from top to bottom, is embedded in the piston. This invention solves the problem of vertical gaps appearing in the anti-pull-out device due to reduced installation height, leading to impact loads and device or structural damage during tensile testing.

This utility model belongs to the field of seismic isolation and vibration reduction technology for bridge structures, and specifically relates to a shear energy-dissipating steel truss connecting beam for replaceable railway piers. It includes several steel truss connecting beam units, spaced apart along the height of the pier column. At the same height position, there are four steel truss connecting beam units, each positioned between adjacent pier columns. Each steel truss connecting beam unit includes horizontally arranged upper and lower chords, and at least one set of intersecting diagonal web members between the upper and lower chords. The chords are structural members designed to prevent instability of the outer web members of the pier column. The web members mainly bear axial forces and reduce seismic response by dissipating energy through tensile and compressive deformation. This structure dissipates energy through plastic deformation and yielding, thereby protecting the pier column and achieving a graded energy dissipation effect. Furthermore, the steel truss connecting beam system is easy to replace after damage, and the replaced pier can immediately resume normal use, playing an important role in post-earthquake repair and operation of bridges.

The invention discloses a rigidity-adjustable buffer pad for a damping system of a compressor of a new energy commercial vehicle. An upper buffer pad is formed by vulcanizing an upper buffer pad stainless metal framework, a lower wear-resistant layer framework and a rubber body; the lower buffering cushion is formed by vulcanizing a lower buffering cushion stainless metal framework, a lower buffering cushion upper flanging framework and a rubber body, the upper flanging framework is embedded into the rubber body after being vulcanized, outer layer rubber coating is achieved, the product appearance is improved, and the anti-rust capacity of the frameworks is improved. The height size of the central pipe is 3 mm shorter than that of the cushion pads in a natural state after the cushion pads are assembled, the upper cushion pad, the lower cushion pad and the central pipe form a whole after the whole vehicle is assembled and tightened, the rubber body bears certain compression, and the fatigue life of the cushion pads is prolonged. The inner walls of the rubber bodies of the upper buffer cushion and the lower buffer cushion are arranged to be conical surfaces, and a gap of 1mm is formed between the inner walls and the outer circle of the central pipe, so that the central pipe is convenient to assemble, meanwhile, the transverse rigidity of the buffer cushions can be reduced, rigidity matching of a whole compressor vibration reduction system is integrally realized, and the NVH performance of a whole vehicle is improved.

This invention discloses an adaptive buffer structure based on tungsten alloy and its preparation method, belonging to the field of buffer structure technology. It solves the technical problem that existing solutions using a single homogeneous material structure lack the deformation coupling energy absorption capacity of composite material structures. The structure includes a main frame and at least one buffer node connected to the main frame. Each buffer node comprises an energy-absorbing part and a supporting part, which are stacked. Through this stacked composite structure, the buffer node achieves graded energy absorption, significantly improving energy absorption efficiency compared to traditional single buffer structures and drastically reducing initial peak force, effectively coping with multi-load coupling conditions. It also possesses high rigidity, high toughness, and extremely rapid thermoelectric response characteristics, enabling adaptive stiffness adjustment according to changes in external loads, achieving a technological upgrade from passive load bearing to active protection.