54results about How to "Large deformation range" patented technology

A flexible pneumatic mechanical arm achieving multifunctional gripping comprises a drive mechanism and a gripping device. The drive mechanism is connected with the gripping device. The gripping device comprises a first flexible finger, a second flexible finger, a third flexible finger and a fourth flexible finger. When the gripping device grips an object, the first flexible finger, the second flexible finger, the third flexible finger and the fourth flexible finger are in a cross-shaped state or in a rectangular state to conduct gripping. The cross-shaped state means that each flexible finger is located at the corresponding end of a cross. The rectangular state means that the flexible fingers are located on the four corners of a rectangle correspondingly. The drive mechanism can drive the gripping device to switch from the cross-shaped state to the rectangular state or from the rectangular state to the cross-shaped state. The flexible pneumatic mechanical arm achieving multifunctional gripping can achieve rapid switch between the cross-shaped gripping state and the rectangular gripping state and is suitable for multiple types of objects, good in gripping stability, accurate in gripping and high in efficiency.

The invention discloses a pneumatic fruit and vegetable picking soft hand. The pneumatic fruit and vegetable picking soft hand comprises a base and a plurality of soft fingers; the base comprises an upper base and a lower base which are combined in an embedding manner; each soft finger comprises a soft finger air chamber and a limiting layer; each soft finger air chamber is fixed to the base and the bottom end of each soft finger air chamber is connected with an air pump; and each limiting layer is arranged at the inner side of the corresponding soft finger air chamber in an adhesion manner. The pneumatic fruit and vegetable picking soft hand disclosed by the invention is highly adaptable to a grabbed object, can prevent damages of fruits and vegetables and the surrounding environment, canbe adaptable to weakness, vulnerability and individual shape differences of picked objects, and is simple in structure, good in operability, high in reliability and low in cost.

The invention discloses a device and method for testing performance degradation caused by transistor lattice deformation. The device for testing the performance degradation caused by the transistor lattice deformation comprises a base, a precise displacement platform, a cushion block, a carrier and a pressing block. The method for testing the performance degradation caused by the transistor lattice deformation comprises the following steps of (1) thinning a chip; (2) cutting the chip; (3) sticking the chip; (4) leading an electrode out of a transistor; (5) fixing the carrier; (6) testing the transistor before applying the stress; (7) applying the mechanical stress onto the chip; (8) testing the transistor under the stress; (9) judging whether the performance of the transistor degrades; and (10) obtaining the lattice deformation value when the performance of the transistor degrades. The device and method for testing the performance degradation caused by the transistor lattice deformation has the advantages of easily applying compression stress onto the chip, and being large in range of the applicable mechanical stress, good in chip bend uniform, simple and accurate in lattice tension amount calculation, and is suitable for analyzing the influence of the transistor lattice deformation on the performance of the transistor.

In this invention a method of manufacturing and structure of prestressed composite reinforcements for cylindrical liners is presented. The method relies on creating deep precompression in the liner compensated by according pretension in the reinforcement. This method allows efficient use of mechanical properties of material of the liner and reinforcement and can provide a substantial mass reduction of the overall component.

The invention discloses a variable-rail insulation door and belongs to the technical field of industrial special doors. An upper guide wheel is arranged at the top of each door body, and a walking mechanism is arranged at the bottom of the upper guide wheel. The upper guide wheel is arranged in an upper track, and a turnable walking wheel is arranged in a lower track. The upper track comprises an upper straight track, and a plurality of upper oblique tracks are arranged at two ends of the upper straight track. Upper track variable-rail devices are arranged on the sides of the upper oblique tracks. The lower track comprises a lower straight track, and a plurality of lower oblique tracks are arranged at two ends of the lower straight track. Lower track variable-rail devices re arranged at the crossed positions of the lower straight track and the lower oblique tracks. A grabbing hook is arranged on the side adjacent to the door bodies, and a transverse hook connecting rod is arranged on the other side, and the grabbing hook extends out and then is matched with the transverse hook connecting rod. An adsorbing steel plate is arranged on the outer side wall of the outmost-side door body, extends out and then is matched with an electrical control permanent magnetic chuck built on a wall. Upper, left, right and lower inflating rubber tubes of the door bodies are communicated to form an integrated inflating rubber tube communicated with an air supply system.

The invention relates to a reaction bucket cleaning device. The reaction bucket cleaning device comprises a connecting mechanism and a cleaning mechanism arranged on the connecting mechanism, the connecting mechanism comprises a connecting disc, a positioning mechanism is arranged on the periphery of the connecting disc, a clamping mechanism is arranged on the inner ring of the connecting disc, the clamping mechanism comprises a swing rod, the middle of the swing rod is rotatably connected with the connecting disc, a swing plate perpendicular to the axis of the swing rod is arranged on the swing rod, one side of the swing plate is connected with the connecting disc through an elastic connecting plate, the connecting disc is provided with an extrusion screw used for being in contact with the other end of the swing plate, and a contact block is in elastic connection to the end of the swing rod, the positioning mechanism comprises a positioning rod, the end of the positioning rod is provided with a positioning conical block, the cleaning mechanism comprises a rotary driving mechanism arranged in the middle of the connecting disc, the rotary driving mechanism comprises a rotary outputshaft, multiple sets of cleaning brushes are arranged on the rotary output shaft, and each cleaning brush comprises a cleaning plate connected through two parallel hinge rods.

The invention discloses a self-resetting rocking wall based on buckling-constrained shape memory alloy bars. A rocking wall body and a foundation beam are connected by wall connecting systems, and thewall connecting systems ensure that the wall body and the foundation beam are directly hinged and leave sufficient rotating space for the rocking wall body. The alloy bars are arranged between the rocking wall body and the foundation beam, the bottoms of the alloy bars are connected to the foundation beam through anchoring devices, and the tops of the alloy bars are connected to the rocking wallbody through pre-embedded sleeves. Constraining sleeves are mounted on the circumferential sides of the shape memory alloy bars and wrap the shape memory alloy bars. Main body frames or walls are disposed on both sides of the rocking wall body, and the main body frames or the walls are connected with the rocking wall body through a plurality of sets of inter-wall dampers. The inter-wall dampers can improve the energy dissipation capability of the rocking wall. When the inter-wall dampers do not have the self-resetting performance, the shape memory alloy bars apply pre-tightening force in an over-thread-screwing mode to overcome the return resistance of the dampers.

The invention discloses a hydraulic power antiresonance isolation device. The hydraulic power antiresonance isolation device comprises a hydraulic cylinder, a welding corrugated pipe, a main mass, a base, spiral springs and a suspension mass; the welding corrugated pipe, the main mass, the base, the suspension mass and the hydraulic cylinder are coaxially arranged; the suspension mass is sealed at one end of the welding corrugated pipe; the other end of the welding corrugated pipe is communicated with the hydraulic cylinder; the main mass is connected with the hydraulic cylinder for driving hydraulic oil in the hydraulic cylinder to perform a linear reciprocating motion; the base is used for supporting the hydraulic cylinder; the spiral springs are connected between the main mass and the base; multiple spiral springs are provided, and are uniformly arranged in the peripheral direction of the main mass; and the hydraulic cylinder is a single-piston rod single-acting hydraulic cylinder. Compared with the prior art, the hydraulic power antiresonance isolation device is easy to realize high lever ratio, simple in structure, easy to determine a main spring rigidity value, excellent in spring rigidity linearity, adjustable in parameters and convenient to disassemble.

The invention belongs to the field of vehicle wheel accessories and particularly discloses an adjustable carbon fiber wheel rim combined structure which comprises a wheel frame, spokes and a hub. The adjustable carbon fiber wheel rim combined structure is characterized in that the wheel frame and the spokes are both made of a carbon fiber composite material, the two ends of the spokes are respectively connected with the two sides of the wheel frame and the hub, and the spokes are arranged symmetrically on two sides of the hub and distributed on the wheel frame evenly. The adjustable carbon fiber wheel rim combined structure is simple in structure, is convenient to use and is applicable to composite material vehicle wheels with or without an inner tube. By the adjustable carbon fiber wheel rim combined structure, the circular degree of the wheel frame can be changed through simple adjustment so that circular degree of a whole vehicle wheel can be ensured and the quality reliability of the carbon fiber composite material vehicle wheel can be improved.

The invention discloses a stool-couch linkage device, a frame body and a seat, and belongs to the technical field of seats. The stool-couch linkage device comprises an upper connecting rod, a lower connecting rod, a middle stool and couch connecting rod, a first front stool and couch connecting rod, a second front stool and couch connecting rod, a first connecting rod, a second connecting rod, a front stool and couch support and a middle stool and couch support, and the upper connecting rod or the lower connecting rod can be driven by driving force to rotate so that the stool and couch linkagedevice can be unfolded or folded. The driving force of the first connecting rod can be adjusted by changing the length of the first connecting rod and the length of the second connecting rod, whereinthe first front stool couch connecting rod and the second front stool couch connecting rod which are split are adopted, so that the length of the second front stool couch connecting rod can be increased, and the second front stool couch connecting rod is matched with the first connecting rod and the second connecting rod; therefore, the deformation area of the small quadrangle is enlarged. Meanwhile, the action of the middle stool couch bracket is not influenced, so that the distance between the front stool couch bracket and the middle stool couch bracket can be increased.

The invention belongs to the technical field of aircraft manufacturing and computer image processing, and relates to an achieving method for a morphing aircraft wing frame based on a folded paper structure. According to the achieving method, the three-dimensional coordinate system of the wing is determined, and the shapes of the upper surface curve and the lower surface curve of the wing are characterized by adopting the cross section curve equation; m coordinate points having the equal height are defined in the x-z plane, and the cross section curve equation performs the z-direction translation, such that the shapes of the upper surface curve and the lower surface curve of the wing and the coordinate points having the equal height are positioned in the same x-z plane; and a subsection approximation method is adopted to obtain 2N fitting coordinate points, the m*N top points of the wing frame based on the folded paper structure are obtained with the m coordinate points having the equal height and the 2N fitting coordinate points, the top points and all the adjacent points are connected through straight sections to form the folding pattern of the three-dimensional folded paper corresponding to the wing frame based on the folded paper structure, and the computer-assisted manufacture of the wing frame is further performed. According to the present invention, the good specific strength and the good energy absorption characteristic of the folded paper are utilized to design the wing frame suitable for the morphing aircraft, and the good application prospects are provided.

The invention relates to the field of powder forming machines, in particular to an automatic precision servo powder forming machine. The machine comprises a powder forming machine body, a powder clearing structure, a material pushing structure, a storage structure, an anti-blocking structure and a pressure releasing structure, wherein powder materials on a forming die and a finished product are cleared through the powder clearing structure, so that dust clearing of the powder materials is more convenient, and the production processing environment is greatly improved; the top end of the powderforming machine body is provided with the storage structure which is rotationally connected, so that the powder materials are convenient to store, the materials are more convenient to discharge out ofthe storage structure, meanwhile, the powder materials are more convenient to add, and material adding does not influence normal production; meanwhile, dust raising is avoided, and the storage effectof the materials is better; and one end of the anti-blocking structure is connected with the material pushing structure, and the other end of the anti-blocking structure is connected with the storagestructure, so that when the material pushing structure works, shaking of the materials in the storage structure is convenient to drive, hardening of the materials is avoided, and the materials can bebetter discharged.

The invention relates to the field of rust sensors and particularly relates to a large-range fiber grating rust sensor which comprises an upper cavity, a lower cavity, an L-shaped connecting member and a grating. The upper cavity is arranged in a cavity of the lower cavity, the upper end of a bottom plate of the lower cavity is provided with a lower cavity groove with an upward opening, the bottomof the upper cavity is provided with an upper cavity groove with a downward opening, and the upper cavity groove opening and the lower cavity groove opening are fitted to form a detection cavity which is internally provided with a threaded steel. An upper end of the L-shaped connecting member is horizontally provided with an optical fiber, the grating is arranged on the optical fiber, and two sides of the cavity of the lower cavity at two ends of the optical fiber are connected. The threaded steel in the detection cavity rusts, the volume is increased, the upper cavity is pushed to move upward, thus the fiber grating which is in contact with the L-shaped connecting member generates a corresponding wavelength shift, the fiber grating is used as a sensing element, and the disadvantage thata traditional electrical sensor is susceptible to electromagnetic interference and has poor short-term stability is overcome.

The invention relates to a waterproof and dustproof key, which comprises a PCB, a contact and a film, wherein a response region is positioned on the surface of the PCB, the film is provided with a flexible membrane layer, one end of the contact is adhered to the surface of the response region, the flexible membrane layer covers the other end of the contact, and the film is connected with the PCB in a sealed manner. By adopting the sealed connecting mode of the PCB, an adhesive layer and the film, a sealed region is formed inside the key, and the film is made of a waterproof easy-to-clean material, so that the key can be easily cleaned while resisting water and dust. In addition, an elastic sheet is arranged inside the key, so as to bring better hand feeling to the user, and obtain better sensory feedback on key pressing.

The invention provides a camber-variable wing trailing edge and a wing capable of realizing continuous bending of the wing trailing edge. The camber-variable wing trailing edge at least comprises a front sub-wing rib, a rear sub-wing rib and a flexible hinge for connecting the front sub-wing rib and the rear sub-wing rib, and the flexible hinge comprises a first cross reed and a second cross reed;and the first cross reed and the second cross reed are arranged in a spatial cross line manner in the front-rear direction of the wing trailing edge. The wing trailing edge is of a sectional structure, and the adjacent sub-wing ribs are connected through the flexible hinges, and the wing trailing edge has the advantages of being high in flexibility, simple in structure and light in weight.

The invention provides a novel variable-diameter gate rubber core. The novel variable-diameter gate rubber core comprises a rubber core body, mounting blocks, a limiting mechanism and a rubber overflow mechanism, wherein an arc-shaped mounting groove is formed in the inner wall of the rubber core body, sealing layer rubber is arranged in the mounting groove, and when the sealing layer rubber is arranged in the mounting groove, filling gaps are reserved between the outer walls of the two ends of the sealing layer rubber and the rubber core body; the mounting blocks are symmetrically arranged on the outer walls of the two ends of the rubber core body, driving grooves are formed in the inner walls of the mounting blocks, detachable driving rubber is arranged in the driving grooves, and one end of the driving rubber is matched with the filling gaps; the limiting mechanism is embedded in the rubber core body, and the limiting mechanism surrounds the end surface, the top surface and the bottom surface of the driving rubber; and the rubber overflow mechanism is arranged in the mounting blocks. According to the novel variable-diameter gate rubber core, the driving rubber and the sealing layer rubber can be independently replaced according to the damage condition, the whole gate rubber core does not need to be replaced, so that the maintenance cost is reduced; and the driving rubber can extrude the two ends of the sealing layer rubber, so that the sealing effect of the two sealing layer rubber is improved, and sealing of drill rods with different diameters is realized.