40results about How to "Stiffness controllable" patented technology

The invention relates to the fields of soft robots, pneumatic control and bionics, in particular to a six-degree-of-freedom compliant joint driven by pneumatic muscles. The compliant joint includes the pneumatic muscles, displacement sensors, universal joint couplings, a static platform, a lower-end sleeve, deep groove ball bearings, a supporting pressure spring and a movable platform. Three setsof reaming holes are formed in the movable platform, the included angle of every two sets of reaming holes is 120 degrees, which conforms to the Stewart feature distribution, each reaming hole set comprises two identical reaming holes, and the distance between any reaming hole and the center point of the movable platform serves as a radius R1; the static platform is identical to the movable platform, each reaming hole set comprises two identical reaming holes, and the distance between any reaming hole and the center point of the static platform serves as a radius R2; R2 is greater than R1. Thesix-degree-of-freedom compliant joint is in parallel connection with a bionic joint and has spatial six-degree-of-freedom movement and large posture movement space, and the movement mechanism range of the compliant joint is similar to that of the neck joint of the human body; meanwhile, the motion compliance of the mechanism is improved, and the adjustable posture range of the mechanism is widened.

A leaf spring suspension system with an air bag lifting axle structure, and a vehicle having same. The leaf spring suspension system with an air bag lifting axle structure comprises: an air bag (4), an equalizing beam (12), a first leaf spring (8), a second leaf spring (15), a first thrust rod (17), a second thrust rod (21), and a front leaf spring support (16), a middle leaf spring support (13), an air bag mounting support (3) and a rear leaf spring support (6) that are respectively and orderly mounted on a frame (5).

The invention discloses a fiber reinforcement material based on liquid metal. The fiber reinforcement material based on the liquid metal comprises a fiber reinforcement and the liquid metal, wherein the fiber reinforcement mainly plays a supporting role, and the external load is dispersed to all positions along the trend of fibers; the liquid metal fills the fiber reinforcement and plays a supplementary supporting role, the rigidity adjustment can be realized along with the change of the existence state, when the temperature is lower than the melting point of the liquid metal, the liquid metalexists in a solid state, and the rigidity of the material is the highest; and with the increase of temperature, the liquid metal gradually changes from the solid state to a liquid state, the rigidityof the material is gradually decreased, and the rigidity of the material is decreased to the minimum when the liquid metal completely exists in the liquid state. The invention further provides a preparation method for the fiber reinforcement material. The fiber reinforcement material and the preparation method thereof have the advantages that the rigidity of the obtained material can change continuously along with the change of the external temperature, the fiber reinforcement material is a good material with controllable rigidity and can be applied to various fields such as flexible robots and exoskeletons.

A damping-rigidness-controllable double-freedom-degree vibration active control platform comprises a cross-shaped beam frame and a square base which are connected through a flexible hinge. A cross-shaped beam of the cross-shaped beam frame is distributed in the diagonal directions of the square base. A structure column is arranged at the center of the cross-shaped beam frame. Sensors and actuators are connected between the lower portions of the diagonal top ends of the cross-shaped beam frame and the square base respectively. Four limiting columns are arranged between the cross-shaped beam of the cross-shaped beam frame and the square base respectively. Prearranged gaps are reserved between the limiting columns and the cross-shaped beam frame. Four balancing weights are fixed on the lower portion of the cross-shaped beam frame between the sensors or the actuators and the limiting columns respectively. Twisting limiting spring pieces are arranged at the symmetrical positions on the lower portion of the cross-shaped beam frame between the limiting columns and the flexible hinge. The electromagnetic type sensors and the electric-damping electric-rigidness actuators are used to achieve detecting of angular speed and actuating, the flexible hinge and the spring piece with changeable thickness are combined to achieve controllable damping and rigidness in a quantifying mode, and double-freedom-degree vibration active control in the x direction and the y direction of the structure is achieved.

The invention relates to a method for preparing a micro-nano oriented fiber with a controllable rigidity. The method comprises the following steps: preparing a spinning solution for a shell layer, preparing a spinning solution for a core layer, and preparing the micro-nano oriented fiber with the controllable rigidity. The micro-nano oriented fiber prepared by the method has a highly-oriented structure, and the thickness of the shell / core can be regulated based on the characteristics of a shell-core structure to regulate the rigidity of the fiber without changing the integral structure or thesurface chemical properties of the fiber.

The invention relates to a prefabricated reinforced concrete culvert T-shape mould, which can solve the problems of hard installment, hard control on the verticality and surface smoothness; loose connection between plates, and concrete leakage, etc. The invention comprises a bottom support, a bottom plate mould, and side plate moulds, while said mould is rectangle whose two sides are mounted with side moulds (2); and two ends are mounted with support side moulds (4); two ends of side mould (2) are mounted with side plate fixed skeletons (5); side moulds () and the support side mould (4) and the side plate fixed skeleton (5) form special-shaped side mould; the baffle mould (6), chair-shaped bottom plate mould (7) and the trapezium bottom mould (8) form the bottom support mould; and the side mould forms the whole mould with bottom support mould. The invention has simple structure and easy installment, which can save cost and labor force, to improve the construction speed and quality.

The invention relates to a laminated wood prestressed sleeve bolt joint. The laminated wood prestressed sleeve bolt joint comprises a wooden column (1), a wooden beam (2), a sleeve (3) with a round inner part and a square outer part, a T-shaped steel clamping plate (4) and a bolt, the T-shaped steel clamping plate (4) comprises a web (41) and a wing plate (42) which are perpendicular to each other, the wing plate (42) is fixed on the side wall of the wooden column (1) through the bolt, the wooden beam (2) is connected with the web (41) through the bolt and the sleeve (3) with the round inner part and the square outer part, and the bolt is sleeved with the sleeve (3) with the round inner part and the square outer part. Compared with the prior art, the laminated wood prestressed sleeve bolt joint has the advantages of high initial rigidity, strength and ductility, convenience and effectiveness in construction, high industrialization degree and the like.

The invention discloses an adjustable resonance block which comprises circular-cake-shaped bottom plate connecting pieces connected coaxially, a weight block and an elastic part. The bottom plate connecting pieces are in a circular cake shape. First bolts are arranged at the bottom face axes of the bottom plate connecting pieces. The first bolts are used for connecting of vehicle parts. The weight of the weight block can be adjusted. One face of the elastic part is connected with the top faces of the bottom plate connecting pieces. The other face of the elastic part is connected with the weight block. The adjustable resonance block is simple and regular in structure, accordingly, machining is easy, mounting and using are convenient, the bottom connecting pieces and the weight block are connected with circular faces through circular-cake-shaped rubber, the contacting area is large, connecting is stable and firm, the shape and the connecting mode of the elastic part are regular, and accordingly the rigidity of the resonance block can be easily controlled.

The invention discloses a transverse partition method for reducing ground surface settlement and building structure deformation of underground structure construction. In a foundation pit or a pilot tunnel, a transverse reinforcing structure layer which has controllable vertical bearing capacity and is located between an existing building foundation and a planned underground structure is formed through a non-excavation technology method. When the reinforcing structure layer is close to the bottom of the existing structure foundation, the reinforcing structure layer servers as a raft foundation or a strip foundation of the existing structure, and the capacity of the existing structure for resisting deformation is enhanced. When the reinforcing structure layer is close to the top of the planned underground structure, the reinforcing structure layer serves as a transverse bearing system of the planned underground structure, and influences of stratum deformation caused by the planned underground structure on the existing building foundation are isolated. The transverse partition method can effectively reduce the problems of ground surface settlement in the underground structure construction and deformation of adjacent buildings, and has the advantages of being good in construction flexibility, wide in application range and controllable in reinforcement effect.

The invention discloses a special-shaped precast pile zipper type supporting structure and a construction method thereof. A special-shaped precast pile comprises a special-shaped pile end plate and aspecial-shaped pile body, the special-shaped precast pile body is made of a concrete material and applies prestress, a reinforcement cage is arranged in the pile body, a pile web is in a hollow circular shape, and the special-shaped precast pile is in an irregular short T shape. The construction method comprises the steps that the special-shaped precast piles are symmetrically constructed in a staggered mode on site; the two staggered special-shaped precast piles are tightly buckled to form a chain type supporting structure; after buckling construction of the special-shaped precast piles is finished, small-diameter high-pressure jet grouting mixing pile construction is carried out at the joint of the two parallel special-shaped precast piles, and a high-pressure jet grouting mixing water stop body is formed to block a gap formed by the parallel special-shaped precast piles; and concrete crown beams are arranged at the tops of the special-shaped precast piles. The supporting structure is particularly suitable for a construction environment with a narrow site, the use amount of concrete and water-stop mixing pile cement is saved, meanwhile, the integrity and the lateral deformation resistance of the foundation pit supporting structure can be enhanced, and economic and environmental benefits are remarkable.

The invention discloses a bionic rigid-flexible coupling variable-rigidity continuum robot and a control method, the continuum robot comprises a machine body, continuum mechanisms, a main framework, a rigidity adjusting mechanism, a driving mechanism, a sensor unit, a control processing module and a power module, and the continuum mechanisms comprise a first continuum mechanism, a second continuum mechanism and a third continuum mechanism; each rigid mechanism is composed of a plurality of circular rigid section pieces, an elastic rod and a compression spring, each rigidity adjusting mechanism is composed of a plurality of sets of friction sliding blocks, springs, pressing blocks, pull rods, connecting rods, connecting shafts, rotating discs, torsional springs and pull ropes, and the control method comprises a pose control method and a rigidity control method. The continuum robot has the advantages of being compact in structure, light, flexible, controllable in rigidity and the like, and winding and grabbing of objects can be achieved.

The invention discloses a shock absorbing device and an engine system and belongs to the technical field of shock absorption. The shock absorbing device comprises a shell and a transmission shaft. Theshell is connected to a rotating driving part and a plurality of inner convex teeth are circumferentially arranged on the inner wall of the shell; the transmission shaft is arranged on the shell in apenetrating manner, a plurality of outer convex teeth are circumferentially arranged on the outer wall of the transmission shaft, the outer convex teeth and the inner convex teeth are distributed alternately, and rubber shock absorbing blocks are arranged between the adjacent outer convex teeth and inner convex teeth. When a flywheel drives the shell to rotate, the inner convex teeth on the shellpull the transmission shaft to rotate through the rubber shock absorbing blocks, the transmission shaft then drives a follow-up transmission system to rotate, and elastic damping of the rubber shockabsorbing blocks can convert rigid impact to elastic impact so as to achieve shock absorption. The rigidity of the rubber shock absorbing blocks is easily controlled, the rigidity of the rubber shockabsorbing blocks is smaller, and the vibration energy can be consumed in form of heat energy more effectively, so that torsional vibration is inhibited, the inherent frequency of the integral device is avoided to the maximum extent, and the shock absorbing effect is good.

The invention belongs to the field of bridge vibration isolation, and particularly relates to a laminated magneto-rheological vibration isolation support based on a transmission lifting device. The support comprises an upper steel disc, a lower steel disc, an upper permanent magnet, a lower permanent magnet, a laminated supporting mechanism, a lead core, a lower supporting shell and a lifting device, the upper permanent magnet is attracted to the bottom face of the upper steel disc, the lower permanent magnet is arranged in the lower supporting shell, and the lower permanent magnet moves up and down in the lower supporting shell through the lifting device. The laminated supporting mechanism is cylindrical and is formed by alternately vulcanizing magneto-rheological elastomers and steel plates, and a through hole is formed in the center of the laminated supporting mechanism; the lead core is arranged in a through hole of the laminated supporting mechanism in a penetrating mode, and thelower end of the lead core is fixedly connected with the lower supporting shell. According to the vibration isolation support, the distance between the upper permanent magnet and the lower permanent magnet is changed through the lifting device, a magnetic field with the adjustable strength is generated, particularly, the shearing modulus in the horizontal direction is large enough, and the large shearing force effect in the horizontal direction can be resisted.

The invention discloses a squirrel-cage squeeze film damper, and belongs to the technical field of squeeze film dampers. The squirrel-cage squeeze film damper aims to solve the problems that an existing squeeze film damper is complex in structure and high in production cost, and the rigidity is not easy to control. The squirrel-cage squeeze film damper comprises a squirrel-cage shell, a bearing, a damper sleeve assembly and a lubricating oil way, wherein the damper sleeve assembly and the bearing are arranged in the squirrel-cage shell, the damper sleeve assembly is attached to the bearing, the damper sleeve assembly is provided with the lubricating oil way for lubricating the bearing and an oil ring cavity, and the lubricating oil way is in communication with the oil ring cavity. According to the squirrel-cage squeeze film damper, the vibration phenomenon of a rotating shaft system can be reduced, the design flexibility and installation convenience of the squeeze film damper are improved, and the production cost is reduced; and the damper is simple in structure, convenient to install and low in manufacturing cost, the supporting rigidity of the damper is easier to control, and the rigidity can be changed only by changing the number, the length, the thickness or the width of the squirrel cage bars.

A damping-rigidness-controllable double-freedom-degree vibration active control platform comprises a cross-shaped beam frame and a square base which are connected through a flexible hinge. A cross-shaped beam of the cross-shaped beam frame is distributed in the diagonal directions of the square base. A structure column is arranged at the center of the cross-shaped beam frame. Sensors and actuators are connected between the lower portions of the diagonal top ends of the cross-shaped beam frame and the square base respectively. Four limiting columns are arranged between the cross-shaped beam of the cross-shaped beam frame and the square base respectively. Prearranged gaps are reserved between the limiting columns and the cross-shaped beam frame. Four balancing weights are fixed on the lower portion of the cross-shaped beam frame between the sensors or the actuators and the limiting columns respectively. Twisting limiting spring pieces are arranged at the symmetrical positions on the lower portion of the cross-shaped beam frame between the limiting columns and the flexible hinge. The electromagnetic type sensors and the electric-damping electric-rigidness actuators are used to achieve detecting of angular speed and actuating, the flexible hinge and the spring piece with changeable thickness are combined to achieve controllable damping and rigidness in a quantifying mode, and double-freedom-degree vibration active control in the x direction and the y direction of the structure is achieved.

The invention provides a mechanical arm joint with controllable rigidity. The mechanical arm joint comprises an upper platform, a lower platform, and a first motion branched chain and a second motionbranched chain connected between the platforms. The first motion branched chain comprises six rotating pairs; a sixth rotating pair and a seventh rotating pair are connected with the upper platform; afirst rotating pair is connected with a second rotating pair through a connecting rod; the second rotating pair is connected with a third rotating pair through a connecting rod; the third rotating pair is connected with a fourth rotating pair through a connecting rod; the fourth rotating pair is connected with a fifth rotating pair through a connecting rod; the fifth rotating pair is connected with the sixth rotating pair through a connecting rod; the second motion branched chain comprises the seventh rotating pair; and the seventh rotating pair is connected with the upper platform and the lower platform. The second rotating pair is driven to change the axis position of the third rotating pair, so that the position of an intersecting point of the axis of the first rotating pair, the axisof the third rotating pair and the axis of the sixth rotating pair in movement of the first branched chain is changed, rotating conditions are destructed, and the rigidity controllability of the mechanism and the locking in any position are achieved.

The invention provides a jiggle corrosion abrasion-micro amplitude collision abrasion test machine. The test machine consists of a main machine and a system, wherein the system comprises a measurementcontrol system and a cooling system; the main machine comprises a device base, a driving motor, an eccentric wheel mechanism, a lever-type swinging-arm mechanism and an electric heating furnace; thelever-type swinging-arm mechanism drives a shaft pin of a rolling bearing serving as a rotating center, and is arranged on the device base through front and rear brackets with balls; a frequency-variable motor enables the lever-type swinging-arm mechanism to produce reciprocating swing by using the shaft pin as the center and using a pin roller bracket as a plane through an eccentric wheel which is arranged at the shaft end and provided with the rolling bearing; each part is lubricated by lubricating grease; and a hole at the bottom of the electric heating furnace enables the lower part of a swinging-arm test section to be supported on the pin roller bracket. The test machine is used for representing the jiggle corrosion abrasion and micro amplitude collision abrasion work properties of crowned turbine blades, blades with various intermediate damping tables and blade vibration damping device and the like in the power mechanical devices in aviation, ship, industrial gas turbine and steam turbine and the like, and can be applied to the similar machinery.

The invention provides a combined air spring integrated with a coil spring with an additional air chamber with the adjustable volume. The combined air spring comprises an upper covering plate, a pouch leather, a lower covering plate, the additional air chamber, an additional air chamber piston, a piston rod and a linear stepper motor. The upper covering plate, the pouch leather and the lower covering plate form an air spring, and an air spring cavity of the pouch leather is filled of high-pressure air. The additional air chamber is mounted on the lower covering plate in the an air spring cavity and is in a cylindrical shape. The additional air chamber has an opening end and an enclosed end, and the enclosed end contacts with the lower covering plate. The center of the additional air chamber is located on the central connecting line of the upper covering plate and the lower covering plate. The additional air chamber is provided with the additional air chamber piston which is capable of performing reciprocating motions freely, and the additional air chamber piston is connected with the upper covering plate through the piston rod fixed on the additional air chamber piston. The effective volume of the additional air chamber is formed by the additional air chamber piston and the enclosed end of the additional air chamber.

The invention discloses a variable rigidity vibration isolator based on multi-layer dielectric elastomer films. The vibration isolator comprises a multi-layer dielectric elastomer film spring and a plurality of annular magnets. The multi-layer dielectric elastomer film spring is formed by overlapping the multi-layer dielectric elastomer films and multiple conductive electrodes, and the polaritiesof the adjacent conductive electrodes are opposite. The vibration isolator realizes the non-linear negative stiffness through non-linear restoring force generated by the mutually attracted annular magnets. By changing driving voltage applied to the conductive electrodes of the multi-layer dielectric elastomer film spring, the multi-layer dielectric elastomer film spring is made to provide the positive stiffness matched with the driving voltage. Quasi-zero stiffness nearby the working position is realized through combination of the negative stiffness and the negative stiffness, and the inherentfrequency of a vibration isolation system is effectively reduced. As the multi-layer dielectric elastomer film spring provides the positive stiffness for voltage adjustment and control, the defect that the stiffness adjustment and control capacity of a single-layer dielectric elastomer film is limited is overcome, the stiffness adjustable and controllable range is greatly expanded, and adjustmentand control over the stiffness is realized.

The invention provides a method for preparing a concrete process tea ware through the reverse mold technology. The method comprises the following steps that (1) a mold frame capable of accommodating a tea ware original model is manufactured according to the tea ware original model such as a tea tray, a saucer, a tea hold, a tea pet and a tea holder; (2) a mold pouring material is blended; (3) the pre-blended mold pouring material is poured till overflows the top end of the mold frame by 1-5 cm, bubbles are removed, mold opening is conducted after the pouring material is hardened, the mold frame is taken out, and a tea ware mold is obtained; (4) a cement-based mixture is prepared, prepared cement concrete is poured into the tea ware mold, vibration is conducted so that all spaces can be sufficiently filled with the concrete, plastering and finishing are conducted, and a top mold body is covered; and (5) a cement tea ware is maintained in the mold, and a finished cement tea ware is obtained. According to the method, the cement concrete is applied to prepare the tea ware for the first time, the prepared cement tea ware is good in fragrance gathering effect, and the plain texture of the cement material is sufficiently achieved.

The invention discloses a stiffness-damage-collapse controllable type single frame and a frame structure. The single frame comprises a foundation, two anti-bending frames, a hinge supporting steel frame, at least one buckling restrained brace and two sets of limiting parts. The hinge supporting steel frame is arranged between the two anti-bending frames, and first steel frame beams and second steel frame beams are correspondingly hinged to connection beams of the anti-bending frames. One end of the buckling restrained brace is hinged to one on the lowest side of the multiple first steel framebeams or the multiple second steel frame beams, and the other end of the buckling restrained brace is hinged to the foundation. Each set of limiting parts comprises at least one limiting part, one endof each limiting part is connected with the foundation, the other end of each limiting part is provided with a limiting block, and the limiting blocks and the corresponding first steel frame beams orthe second steel frame beams are arranged alternately so as to limit the movement of the corresponding first steel frame beams or the second steel frame beams relative to the corresponding limiting parts. The single frame maintains the advantage of being flexible in frame space, and meanwhile has the excellent anti-seismic property and post earthquake repair property.

The invention provides a negative-stiffness-adjustable torsional quasi-zero stiffness vibration isolator and a control method. The negative-stiffness-adjustable torsional quasi-zero stiffness vibration isolator comprises a front shell, a rear shell, a front washer, a rear washer, a rotary sleeve used for fixing a transmission shaft, and a permanent magnet excitation mechanism. A rotary component of the permanent magnet excitation mechanism is fixedly connected with the rotary sleeve and is fixedly connected with a permanent magnet through a rubber pad. A magnetic flux generated by the permanent magnet passes through the rubber pad, the rotary component, an air gap and an annular permanent magnet clamping mechanism to return to the permanent magnet to form a magnetic flux loop, and the magnetic stress is generated in the air gap and is applied to the rotary component, so that a torsional magnetic spring is formed by the rotary component in the thickness direction of the air gap. The magnetic field intensity in the air gap is changed by adjusting the intensity of current supplied to an exciting coil, and then the negative stiffness of the magnetic spring is changed to be close to thepositive stiffness achieved through a rubber bearing, so that the system stiffness is made to the quasi-zero state. The negative-stiffness-adjustable torsional quasi-zero stiffness vibration isolatorcan effectively transmit the driving torque and can isolate the disturbance torque; the system stiffness is actively controlled, so that low-frequency torsional vibration is well isolated; and the negative-stiffness-adjustable torsional quasi-zero stiffness vibration isolator is suitable for a precision rotating system.

The invention discloses a transverse partition method for reducing ground surface settlement and building structure deformation of underground structure construction. In a foundation pit or a pilot tunnel, a transverse reinforcing structure layer which has controllable vertical bearing capacity and is located between an existing building foundation and a planned underground structure is formed through a non-excavation technology method. When the reinforcing structure layer is close to the bottom of the existing structure foundation, the reinforcing structure layer servers as a raft foundation or a strip foundation of the existing structure, and the capacity of the existing structure for resisting deformation is enhanced. When the reinforcing structure layer is close to the top of the planned underground structure, the reinforcing structure layer serves as a transverse bearing system of the planned underground structure, and influences of stratum deformation caused by the planned underground structure on the existing building foundation are isolated. The transverse partition method can effectively reduce the problems of ground surface settlement in the underground structure construction and deformation of adjacent buildings, and has the advantages of being good in construction flexibility, wide in application range and controllable in reinforcement effect.

The invention provides a combined air spring integrated with a coil spring with an additional air chamber with the adjustable volume. The combined air spring comprises an upper covering plate, a pouch leather, a lower covering plate, the additional air chamber, an additional air chamber piston, a piston rod and a linear stepper motor. The upper covering plate, the pouch leather and the lower covering plate form an air spring, and an air spring cavity of the pouch leather is filled of high-pressure air. The additional air chamber is mounted on the lower covering plate in the an air spring cavity and is in a cylindrical shape. The additional air chamber has an opening end and an enclosed end, and the enclosed end contacts with the lower covering plate. The center of the additional air chamber is located on the central connecting line of the upper covering plate and the lower covering plate. The additional air chamber is provided with the additional air chamber piston which is capable of performing reciprocating motions freely, and the additional air chamber piston is connected with the upper covering plate through the piston rod fixed on the additional air chamber piston. The effective volume of the additional air chamber is formed by the additional air chamber piston and the enclosed end of the additional air chamber.

The invention discloses an electromagnetic quasi-zero stiffness vibration isolation system based on the Stewart platform. The electromagnetic quasi-zero stiffness vibration isolation system based on the Stewart platform comprises an upper platform and a lower platform, the upper platform and the lower platform are oppositely arranged, six vibration isolation devices are arranged between the upperplatform and the lower platform, six vibration isolation devices are arranged according to a Stewart platform mode, a first diaphragm spring is arranged at one ends of the vibration isolation devicesin a sleeved mode, the other end of the vibration isolation device is sleeved with a second diaphragm spring, each vibration isolation device comprises a guide shaft, a magnet set is arranged on the outer side of the guide shaft, a coil set is arranged on the outer side of the magnet set, a gap is formed between the magnet set and the coil set, and an outer cylinder is arranged on the outer side of the coil set. According to the electromagnetic quasi-zero stiffness vibration isolation system, the adjustable nonlinear negative stiffness is realized by utilizing the mutual acting force between the permanent magnet and the conductive coil, the first diaphragm spring and the second diaphragm spring provide positive rigidity, and the quasi-zero rigidity near the working position is achieved through combination of positive and negative rigidity; the electromagnetic quasi-zero stiffness vibration isolation system has the advantages of being simple in structure, the rigidity is controllable and the like, the inherent frequency of the vibration isolation system is effectively reduced, and further the vibration isolation frequency band is widened.

The invention discloses a multi-stage energy consumption device for anti-seismic and vibration reduction of a building structure, which includes a base, a skeleton unit and a support plate, and is characterized in that: the steel skeleton of the device is composed of the several skeleton units, and the skeleton unit is composed of Composed of six plates of the same form, the interior of the plates is composed of rings, and four equal support rods protrude tangentially at equal intervals from the outside. The interior of the skeleton is filled with high-damping rubber, and the upper part of the steel skeleton is covered with a support plate. The device utilizes the composite properties of negative Poisson's ratio steel skeleton and high damping rubber. It is a vibration isolation and anti-seismic system with adjustable damping. Its stiffness can be controlled and damping can be adjusted, which is convenient for multi-level energy consumption design according to the dynamic performance of the structure. .

A leaf spring suspension system with an air bag lifting axle structure, and a vehicle having same. The leaf spring suspension system with an air bag lifting axle structure comprises: an air bag (4), an equalizing beam (12), a first leaf spring (8), a second leaf spring (15), a first thrust rod (17), a second thrust rod (21), and a front leaf spring support (16), a middle leaf spring support (13), an air bag mounting support (3) and a rear leaf spring support (6) that are respectively and orderly mounted on a frame (5).

The invention discloses a damping device and an engine system, belonging to the technical field of damping. The shock absorbing device of the present invention includes a casing and a transmission shaft, the casing is used to connect with the rotating drive and the inner wall of the casing is provided with a plurality of internal convex teeth along the circumference; the transmission shaft is passed through the casing, and the outer wall of the transmission shaft is A plurality of outer convex teeth are arranged in the direction, and the outer convex teeth and the inner convex teeth are alternately distributed, and rubber shock absorbers are arranged between the adjacent outer convex teeth and the inner convex teeth. When the flywheel drives the casing to rotate, the inner convex teeth on the casing turn the drive shaft through the rubber shock absorber, and the drive shaft drives the subsequent transmission system to rotate. The elastic damping of the rubber shock absorber can change the rigid impact into elastic impact, Realize shock absorption; and the stiffness of the rubber shock absorber is easy to control, and the stiffness of the rubber shock absorber is smaller, which can more effectively consume the vibration energy in the form of heat energy, thereby suppressing torsional vibration and avoiding the vibration of the whole machine to the greatest extent. Natural frequency, good shock absorption effect.

The invention discloses a rigidity-controllable supporting device and a CT machine frame system, the supporting device comprises an oil cylinder, the oil cylinder is composed of a cylinder barrel, a piston and a piston rod, the interior of the cylinder barrel is divided into a rod cavity and a rodless cavity by means of the piston and is characterized in that a valve is arranged, two connecting openings of the valve are in communication with the rodless cavity and the rod cavity through a first pipeline and a second pipeline respectively, connection and disconnection between the two connectingopenings are controlled by the valve, the rod cavity, the rodless cavity, the first pipeline and the second pipeline are filled with fluid media, the cylinder barrel and the piston rod are used as two supporting parts of the supporting device, and the rigidity of the supporting device is changed by adjusting connection and disconnection of the valve. The CT machine frame system comprises a base,an inclinable part and a driving part, and at least one rigidity-controllable supporting device is arranged between the base and the inclinable part. According to the rigidity-controllable supportingdevice and the CT machine frame system, the rigidity of the supporting device is controllable, and the supporting device can be used for supporting equipment with the pose needing to be changed.

The invention provides a segmented bending soft finger based on variable rigidity and local thin wall. The segmented bending soft finger comprises a columnar finger cavity and variable rigidity layers, wherein a strain limiting layer and a fiber winding layer are correspondingly arranged on two opposite sides inside the side wall of the columnar finger cavity, a plurality of thin-wall sections with reduced wall thickness are arranged on the side, corresponding to the fiber winding layer, of the finger cavity at intervals along the length direction, the variable rigidity layers are arranged on the side, corresponding to the strain limiting layer, of the finger cavity, each variable rigidity layer is arranged opposite to one thin-wall section and strides across the thin-wall section, and the rigidity of the variable rigidity layers is controlled to be different so that the bending degrees of the finger cavity in the thin-wall sections can be different. The segmented bending soft finger based on the variable rigidity and the local thin wall and the manufacturing method of the segmented bending soft finger have the beneficial effects that the bending conditions of different sections of the finger are controlled by regulating and controlling the rigidity of the variable rigidity layers, meanwhile, the overall rigidity of the finger is improved, and the capacity of lifting a heavy object can be improved.