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).

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 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 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.

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 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 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.