34results about How to "Same stiffness" patented technology

The invention discloses a variable-stiffness single-degree-of-freedom dynamic damping boring rod. The variable-stiffness single-degree-of-freedom dynamic damping boring rod comprises a boring rod front half part and a boring rod rear half part, wherein the boring rod front half part is connected with the boring rod rear half part; a cavity is formed in the boring rod front half part; a mass blockis arranged in the cavity; a rubber hose is spirally wound on the mass block; an axial hole is formed in the rear end surface of the mass block; a radial hole is formed in the side wall of the rear end of the mass block; the axial hole communicates with the radial hole; one end of the rubber hose is fixedly arranged at the front end of the mass block, and is wound to the rear end of the mass blockin the length direction of the mass block; after passing through the radial hole and the axial hole, the rubber hose extends out of the mass block; and an end cap is arranged between the boring rod front half part and the boring rod rear half part. The rubber hose is charged with liquid, so that a pressure intensity regulating structure is realized; and an outside control system is not required,so that liquid of different pressure intensities only needs to be led into the rubber hose only through a hydraulic pump, and therefore, implementation is simple, and cost is relatively low.

An annular combustion chamber wall arrangement includes an annular wall and a plurality of tiles and each tile is secured to and is spaced from a further annular wall. The first surface of each tile faces the annular wall and the second surface of each tile faces away from the annular wall. Each tile has a plurality of pedestals extending away from the first surface towards the annular wall and / or a plurality of effusion cooling apertures extending through the tile from the first surface to the second surface. At least one of the tiles has the pedestals and / or the effusion cooling apertures arranged in a predetermined pattern which provides the tile with a more uniform stiffness in all directions to reduce the possibility of cracking of the tile. In one predetermined pattern the pedestals are arranged in a Fermat's (parabolic) spiral with the pedestals arranged with Fibonacci number ordering.

The invention relates to a catheter stylet for stiffening a catheter during the placing process, wherein the stylet comprises an accommodating lumen for at least one fluid-guiding line of the catheter. It also relates to a catheter stylet catheter system, comprising such a stylet and comprising a catheter which comprises a fluid-guiding line, and to a method for stiffening a catheter during the placing process, wherein a stylet which comprises an accommodating lumen is arranged around at least one fluid-guiding line of the catheter.

Plastic blow molded board-like members include a plurality of longitudinally extending, laterally spaced aligned channels / grooves in opposite sides of the members. Each of the channels has closely spaced apart side walls and inner end walls. The inner end walls of aligned channels in opposite sides of the member are joined together to provide a relatively high strength reinforced core. The ends of the members are completely closed during the blow molding process for increased strength and to keep out dirt and moisture.

Spring teeth for a harvesting machine are each constructed of spring wire having a square cross section and being wound so as to define a coil torsion spring section terminating in a tine, with the tine having a leading flat surface, considered relative to the engagement of tine with the crop during pick-up operation, and having a trailing flat surface disposed parallel to said leading flat surface. The coil torsion spring is mounted to a tooth bar formed as a channel member such that the outer surface of the coils make a relatively large area contact with the tooth bar at location spaced approximately 180° from where the tine joins the coil torsion spring. This together with the fact that the contact area of the flat sides of the wire in the coil region is also quite large leads to a damping action that lessens stress in the tooth assembly.

The invention discloses a building method of superimposed disc spring virtual model for flexible haptic rendering. The building method is characterized in that when the circumstance that a virtual agent collides with any point on the surface of a virtual flexible body is detected, under action of given virtual contact pressure, the inside of a local area in which the virtual agent interacts with the virtual flexible body is filled with the superimposed disc spring virtual model; in the process of interaction, a signal reflecting haptic information of real-time deformation simulation of the flexible body under pressure action and calculated by adopting the superimposed disc spring virtual model is output and fed back ; addition of sums of deformation of disc springs on each layer in the superimposed disc spring virtual model is externally equivalent to deformation of the surface of the flexible body, and sum of pressure consumed when the superimposed disc springs on each layer are compressed. By the building method, the deformation process of the flexible body can be vividly simulated in real time, haptic information which is fed back is real and stable, and a feasible path is sought for practically using virtual operation simulating.

The invention relates to a Jacquard machine, comprising 2 sets of knifes moving up and down in opposition, which each, at each of their extremities, are taken up in separate knife grids (4a, 4b) being driven by a cinematic drive chain (30), and each, at one of their extremities (20a, 20b), being guided into a straight motion by means of a “Watt's linkage” rod system, the height of lift of each of these extremities (20a, 20b) of the knife grids (4a, 4b) being adjustable, and the knife grids (4a, 4b) each at their first extremities (20a, 20b) being linked with at least one first driving lever (2, 2a, 2b, 10) by means of a first linking rod (3a, 3b), and at their second extremities (21a, 21b) being linked with at least a second driving lever (2, 10) by means of a second linking rod (14a, 14b), wherein per knife grid (4a, 4b) one or several elements (1, 101, 1a, 1b, 3a, 3b) of the Watt's linkage rod system are part of the cinematic drive chain (30), and the amplitude of the motion of the said extremity (20a, 20b) of the knife grid (4a, 4b) is adjustable in the cinematic drive chain (30) before the linking point (9a, 9b) between the first rod (1, 101, 1a, 1b) and the third rod (3a, 3b) of the Watt's linkage rod system with respect to the drive motor.

The invention discloses a variable-stiffness single-degree-of-freedom dynamic damping boring rod. The variable-stiffness single-degree-of-freedom dynamic damping boring rod comprises a boring rod front half part and a boring rod rear half part, wherein the boring rod front half part is connected with the boring rod rear half part; a cavity is formed in the boring rod front half part; a mass blockis arranged in the cavity; a rubber hose is spirally wound on the mass block; an axial hole is formed in the rear end surface of the mass block; a radial hole is formed in the side wall of the rear end of the mass block; the axial hole communicates with the radial hole; one end of the rubber hose is fixedly arranged at the front end of the mass block, and is wound to the rear end of the mass blockin the length direction of the mass block; after passing through the radial hole and the axial hole, the rubber hose extends out of the mass block; and an end cap is arranged between the boring rod front half part and the boring rod rear half part. The rubber hose is charged with liquid, so that a pressure intensity regulating structure is realized; and an outside control system is not required,so that liquid of different pressure intensities only needs to be led into the rubber hose only through a hydraulic pump, and therefore, implementation is simple, and cost is relatively low.

The invention relates to a method for repairing a Glare laminate by bonding with a modified adhesive, which is characterized by comprising the following steps of: (1) preparing a repairing patch madeof the same material as a motherboard according to the size of a Glare layer motherboard damage area, (2) adding the suspension containing the modifier into an epoxy resin adhesive, and carrying out ultrasonic stirring to prepare a modified adhesive, (3) treating the damaged part of the mother board to be repaired and the surface of the patch, and (4) coating the surfaces of the treated mother board and patch with a modified adhesive, and curing at a preset temperature. The impact resistance of the modified adhesive repairing test piece prepared by the method is better than that of a traditional adhesive repairing result, the modified adhesive repairing test piece is closer to a standard test piece without damage, and in addition, the crack propagation rate after repairing is also lower than that of the traditional adhesive repairing result.

The invention discloses an integrated rigid rotating arm of a dynamic centrifuge. The shape of the shuttle is large in the middle and small at the left and right ends, and the main body of the rotating arm is a symmetrical structure with front and rear symmetry, left and right symmetry, and up and down symmetry. Sample stages for installing test pieces are respectively installed above the ends of the rotary arm body, and counterweights for one-to-one correspondence with the sample stages are respectively installed under the left and right ends of the rotary arm body to realize left-right symmetry of the rotary arm body. The rigid rotary arm of the present invention has stronger rigidity, lower moment of inertia and smaller air damping, which ensures that the centrifuge has high dynamic performance, and the variable acceleration is directly generated through the variable speed movement of the rotary arm body, which solves the problem of Traditional dynamic centrifuge acceleration needs synthesis, direction change and other issues.

A bumper rail assembled into a bumper of a vehicle includes a bumper rail, a reinforcing member, and a forming part. A bumper rail is disposed at front. The reinforcing member is disposed at the rear side of the bumper rail and forming a closed section together with the bumper rail. The forming part is integrally formed at an inner side of the bumper rail and is disposed parallel along the longitudinal direction of the bumper rail to increase a stiffness of the bumper rail, the forming part having a pipe shape.

The invention belongs to the technical field of engineering structure seismic resistance, and relates to a hinge device with unequal tension and compression toughness and an assembly method. The device comprises a pressure spring for providing an anti-compression restoring force, a tension spring for providing an anti-tension restoring force, a pressure spring baffle for applying a pre-compression force to the pressure spring, a stop block for limiting springback of the pressure spring and the tension spring, a tension spring baffle for limiting springback of the tension spring, an outer pipe for driving the pressure spring baffle and the tension spring baffle, and a tension spring sealing plate for limiting the springback of the tension spring. Aiming at obvious plastic hinge formation and residual displacement of a traditional anti-seismic structure, the device replaces stressed steel bars and the like in an original plastic hinge area to carry out stress service, so that a novel structure has the same rigidity, bearing capacity and higher deformability, and does not generate plastic and residual deformation; aiming at the problem that lateral deformation of a prestress self-resetting structure system is large, the deformation mode and the stress process of the prestress self-resetting structure system are roughly the same as those of a traditional rigid connection structure, and additional increase of lateral deformation is not caused; and the device can be repaired and replaced, the initial state can be recovered through large deformation, and the requirement for replacement is extremely low in multiple times of earthquake service.

A parallel mechanism which has a holding bracket; a movable platform; and three branch joint assemblies of the same structure that are spatially arranged symmetrically about an axis disposed between the holding bracket and the movable platform. Each branch joint assembly has a connecting rod, a linear guide, a driving device and a carriage. The linear guide and the driving device both are secured on the connecting rod. One end of the connecting rod is connected with the movable platform through a hinge having three rotational degrees of freedom. The carriage and the linear guide are connected with each other by a sliding joint, and the carriage is connected with the holding bracket by a hinge having one rotational degree of freedom.

A method and structure for providing improved tactile response in fiber reinforced polymer composite materials is disclosed. The effect is achieved by jacketing the reinforcing carbon fiber with a thin coating of non-carbide forming metal, such as nickel. The resulting chemical and mechanical discontinuity at the fiber / coating interface allows for more transient energy to be retained within the fiber, while the strong chemical bond of the polymer matrix to the metal coating assures mechanical integrity of the composite. The result is a composite which retains its characteristic weight, stiffness, and strength, but exhibits increased low frequency vibrational sensitivity in composite applications, such as for fishing rods and other recreational equipment.

The invention belongs to the field of repairing of fiber metal laminated plates (Glare laminated plates), and particularly relates to a method for repairing a Glare laminated plate through adhesion ofa modified adhesive. According to the preparation method, a low-cost and low-consumption flame method is adopted to grow a carbon nanotube layer on the surface of the carbon fiber in situ to preparethe carbon nanotube coated composite carbon fiber; the chopped composite carbon fibers are mixed into the adhesive in proportion, so that the bonding strength of the interface between the adhesive layer and the light material and the body strength of the adhesive layer are enhanced, the bonding strength between the mother board and the patch in the repairing process of the Glare laminate is improved, and a better repairing effect is achieved; the patch and the mother board are made of the same material, so that the patch and the mother board are the same in rigidity and have good compatibility. The method is simple, quick and extremely low in cost, and has a wide application prospect in the field of bonding of light materials for aerospace, transportation and the like.

The invention belongs to the repairing field of fiber metal laminated boards (Glare laminates), and in particular relates to a method for repairing Glare laminates by bonding a modified adhesive. The invention adopts a low-cost, low-consumption flame method to grow carbon nanotube layers on the surface of carbon fibers in situ to prepare composite carbon fibers wrapped by carbon nanotubes; and mix chopped composite carbon fibers into the adhesive in proportion to realize adhesive The bonding strength of the interface between the layer and the lightweight material and the enhancement of the body strength of the adhesive layer, thereby improving the bonding strength between the motherboard and the patch in the Glare laminate repair, to achieve a better repair effect; the patch used in the present invention The sheet and the motherboard are made of the same material, so that both have the same rigidity and have better compatibility. The method of the invention is simple and quick, and has extremely low cost, and has wide application prospects in the bonding fields of aerospace, transportation and other light materials.