1960results about How to "Guaranteed stiffness" patented technology

The invention discloses a double-finger double-driving translation clamping type flexible grip and a control method. The double-finger double-driving translation clamping type flexible grip comprises double servo motor systems, double motor end synchronous pulleys, double positioning sliding guide rail systems, double ball screw systems, double screw synchronous pulleys, double finger paws, a U-shaped main rack of the grip and a main rack cover plate, wherein the coordinating fetching action of two paws is realized by the control on two servo motors. A fetching method is characterized in that the double motors are used as power, double fingers are respectively fixedly arranged on two screw guide rail synchronous switching modules, through the rotation of two synchronous toothed belts between the double motor end synchronous pulleys and the ends of the double screw end synchronous pulleys, the rotation of the motor is converted into linear motion by a screw, so that the double fingers are translated respectively along two positioning sliding guide rails, and the translation switching on and off of the double paws along double guide rail surfaces can be realized. Due to the fact that the device is used for independently driving the corresponding paws to move by the double motors, so that the double fingers can more flexibly move, and different fetching speeds can be set for the double fingers, and the position precision is high.

The invention relates to a modularizing self-adaptation adjusting clamp used in the automobile welding, comprising a based station(1), a clamping mechanism(100) fixed on the based station(1) , an independent principal positioning mechanism(200), and an online real-time detecting and self-adaptation adjusting device(300). The online real-time detecting and self-adaptation adjusting device (300) is composed of a stepping motor (305), a slider (308), a straight-line guiding rail (309) and a transmission device. The transmission device, which is driven by the stepping motor (305), pushes a pushing rod (301) and the slider to slide along the straight-line guiding rail (309). The invention is more flexible and is convenient for the connection and combination of every component by means of modularized, standardized and serialized clamp elements, can be adapted to various work within a certain range and type, can effectively reduce the manufacturing cost, effectively controls the precision of the key points of workpieces and improves the welding quality and efficiency.

The invention discloses a controlled degradation type full-biodegrade agricultural mulching film, belonging to the technical field of agricultural mulching films. The full-biodegrade agricultural mulching film comprises the following raw materials by weight percent: 0.5%-50% of a processing aid A, 0.1%-0.5% of a processing aid B, 2%-10% of a functional aid A, 0.3%-2% of a functional aid B, 0.1%-5% of a functional aid C and the balance of full-biodegrade polyester. The full-biodegrade agricultural mulching film is reasonable in design, and the stiffness of the mulching film is kept by compounding flexible full-biodegrade resin with rigid full-biodegradable resin; good physical performance of the mulching film is ensured by reasonably combining various aids with full-biodegrade polyester; in addition, the mulching film does not contain non-biodegradable resin, is good in comprehensive performance, can meet the requirements on the degradation time caused by crops, and cannot affect subsequent farm operation after being degraded.

The invention relates to a modular patient support system for use with radiotherapy treatments comprising a basic portion to be fixedly mounted and an exchangeable radiotransparent modular portion, said portion to be fixedly mounted being provided with a radiotransparent supporting part intended for supporting an exchangeable modular portion and means being provided for exactly positioning said modular portion in relation to said basic portion and coupling it to said basic portion.

The invention relates to a plane orientating system with large stroke, high speed nanometer stage precision and macro/micro dual driven. The X-shaft flexible hinge is fixed between the X-shaft micro moving platform 19 and X-shaft macro moving platform 16; the X-shaft piezo-electric ceramic 18 is posited inside the X-shaft micro moving platform 19; the cushioning hinge 29 is fixed between the inner guide 28 and the outer guide 30; one end of Y-shaft piezo-electric ceramic 24 is connected with Y-shaft micro moving platform 23; two bearings 34 are separately rotating connected with inner guide 18 and outer guide 30 of the Y-shaft macro/micro moving platform 8. The working rage is 25mmX25mm; the resolution is 10nm; the repetition orientating precision is 20nm; the maxim speeds of X-shaft and Y-shaft are separately at 50m/s2 and 100m/s2.

The invention relates to a tunnel-assembled lining structure and a tunnel across a large-scale active fault zone in a strong earthquake zone, and relates to the field of transportation infrastructureconstruction. The structure comprises an initial support layer, a spray film waterproof layer, an assembly type concrete-filled steel tube lining layer and a flexible joint; the assembly type concrete-filled steel tube lining layer is provided with a plurality of concrete-filled steel tube lining sections, each section is provided with a first steel tube sheet, a second steel tube sheet and a third steel tube sheet which are arranged from outside to inside, a first lining layer is arranged between the first steel tube sheet and the second steel tube sheet, and a second lining layer is arrangedbetween the second steel tube sheet and the third steel tube sheet. The first lining layer includes a plurality of hollow steel tubes arranged at intervals and lightweight foam concrete for filling gaps, the second lining layer comprises high compressibility concrete, and the lining sections are connected through the steel plate spring type flexible joint. The structural stability under dislocation and strong earthquakes can be ensured, and the tunnel-assembled lining structure has functions of quick installation, replacement and quick repair; the principle of stiffness matching is fully considered in the structure, and multiple measures are combined to 'lead the earthquake'.

The invention discloses a micro-embedded self-lubricating texture on the surfaces of a gear and a cam and a preparation method thereof. The preparation method comprises the following steps of: performing micro texture processing on the surfaces of the gear and the cam by an Nd: YAG laser processing technology; and embedding a solid lubricant into the micro texture on the surfaces of the gear and the cam by a molding bonding technology of a self-lubricating composite material. The self-lubricating composite material comprises the following formula components in percentage by mass: 15 to 85 percent of polyimide (PI), 0 to 85 percent of polytetrafluoroethylene (PTFE), 10 to 40 percent of MoS2, 0 to 15 percent of WS2, 0 to 16 percent of graphite fluoride, 5 to 15 percent of graphite, 0 to 12 percent of PbO, 0 to 6 percent of antimony trioxide, 0 to 10 percent of CaF2 or BaF2, 0 to 15 percent of hexagonal boron nitride, 0 to 15 percent of nano lubricant and 0 to 5 percent of additive. According to the micro-embedded self-lubricating texture, the self-lubricating texture is subjected to micro embedding on the surfaces of the gear and the cam to ensure that the solid lubricant on the friction surface is stably supplied and uniformly coated, so that the lubrication and anti-wear properties of friction pairs such as the gear and the cam under complicated and harsh operating conditions are improved.

The invention discloses an articulated dump truck chassis. The front suspension is composed of front U shape frame, vertical telescopic elastic component, front cross tie. The middle of the closing end of the front U shape frame is ball-pivot coupled with the front frame. The two biforked ends of the front U shape frame are respectively connected with the two sides of the front vehicle bridge. Two ends of the elastic component is connected between the top of the two sides of the front vehicle bridge and the bottom of the front frame. The two ends of the transversal front cross tie are respectively pivoted between the front frame of the two sides of the chassis and front vehicle bridge. The back suspension is composed of weigh beam, middle U shape from connected between the middle vehicle bridge and back frame, back U shape from connected between the back vehicle bridge and back frame, middle cross tie and back cross tie. The invention has simple structure, better maneuvering characteristics, and can prevent the frame from torsional deforming. The invention not only ensures the whole rigidity of the articulated dump truck, but also prevents the articulated dump truck from distortional deformation on the rough ground, increases maneuvering characteristics, especially for rough ground.

The invention provides a space six-degrees-of-freedom mechanism used for a hypersonic wind tunnel multi-body separation test. The mechanism comprises Z, X and Y three degrees of freedom straight-line motion mechanisms and [beta], [alpha] and [gamma] three degrees of freedom angular displacement motion mechanisms. The six-degrees-of-freedom are realized layer by layer and are connected step by step, and in terms of structure, embedment integration is achieved by a box stacking mode. A Z-direction mechanism, an X-direction mechanism and a [beta] mechanism are sequentially overlapped from bottom to top, and a Y-direction mechanism and a [alpha] mechanism are in embedded connection from outside to inside. A [gamma] mechanism is fixedly connected with the [alpha] mechanism through a bent blade, and is individually arranged in a wind tunnel flow field. Each of the Z-direction mechanism, the X-direction mechanism and the Y-direction mechanism adopts two driving assemblies in symmetric arrangement, so that the power and the size of a driving motor are effectively reduced, and the overall stability of the mechanism is improved. The [beta] mechanism and the [alpha] mechanism adopt line-to-arc mechanisms for implementation, so that overlapping of traditional three degrees of freedom rotation pairs is prevented, and the mechanism cantilever length is shortened. The structure is compact, the rigidity is good, andsix-degrees-of-freedom movement of high speed, high precision and high bearing capacity is achieved.

Disclosed are a self-travelling diamond-shaped pin-connected truss-type form traveler structure and a form traveler travelling and constructing method. A form traveler is mainly composed of a main truss system, a horizontal connection system, an internal formwork system, an external formwork system, a bottom formwork platform system, a hanging system, an anchoring system and a travelling system. The main truss system is composed of two main trusses and horizontal bracings, and each single main truss is composed of a lower chord, an upper chord, a diagonal rod and a vertical rod which are connected into a whole via single-hole bolt pins through joint boxes. The two main trusses are connected by the spacing-adjustable horizontal bracings. A rear anchoring system is connected to the rear of the lower chords of the main trusses. The travelling system comprises a section rail located under the main trusses, a left-handed wheel, rollers, a travelling pushing jack and the like. The self-travelling diamond-shaped pin-connected truss-type form traveler structure is quick to install, the spacing between the main trusses and the positions of hanging rods can be adjusted according to the section forms of different box girders on the basis that load bearing is satisfied, the optimal stress state is formed, universality is high, turnover rate of the form traveler is increased greatly, project cost is saved, and economical benefit is obvious.

The invention relates to a machine jellyfish, in particular to a machine jellyfish driven by an embedded type cylindrical motor. The problem that an existing bionic jellyfish robot is limited in moving range, small in effective water spraying size and small in driving force and is not suitable for a complex water flow environment in nature is solved. A mechanical abdominal cavity end cover, a sleeve and a bottom disc base of the machine jellyfish are in sealing connection from top to bottom in sequence. A cylindrical traveling wave ultrasonic motor is arranged on the bottom disc base. A transmission cam is located in the middle of the cylindrical traveling wave ultrasonic motor. A plurality of piezoelectric ceramic pieces are evenly distributed on the outer cylinder wall of the cylindrical traveling wave ultrasonic motor. A plurality of rectangular bosses which are arrayed vertically are evenly distributed on the inner cylinder wall of the cylindrical traveling wave ultrasonic motor. The other end of each arm pushing force rod is connected with a multi-joint arm. Each arm pushing force rod and the sleeve are connected through a pushing force rod guiding flange. An auxiliary spring is arranged between each pushing force guiding flange and an arm pushing force rod close to one side of a double-idler-wheel part. The machine jellyfish is used for unmanned underwater carrying.

The invention discloses a high-toughness, anti-impact and high-flexibility epoxy pouring sealant. The high-toughness, anti-impact and high-flexibility epoxy pouring sealant is composed of a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 0 to 130 parts of toughening epoxy resin, 5 to 20 parts of bisphenol A type epoxy resin, 1 to 18 parts of an active diluent, 1 to 10 parts of a thixotropic agent and 160 to 320 parts of aluminum oxide; the component B is prepared from the following raw materials in parts by weight: 20 to 50 parts of a flexible curing agent, 25 to 50 parts of a hyperbranched curing agent and 1 to 5 parts of an accelerant; the mass ratio of the component A to the component B ranges from (10 to 1) to (20 to 1). According to a preparation method provided by the invention, the materials are prepared and mixed according to formulas of the component A and the component B respectively. The epoxy resin provided by the invention not only has rubber flexibility, but also has excellent heat-resisting performance and rigidity.

The invention provides a pre-stress steel-concrete tower cylinder for a wind turbine generator. The pre-stress steel-concrete tower cylinder comprises a top steel tower cylinder body, a concrete towercylinder body and a bottom disc-shaped foundation, wherein the concrete tower cylinder is formed by vertically connecting multiple circular truncated cone-shaped prefabricated tower cylinder sections, and the segmented mode is horizontal segmentation; each tower cylinder section is formed by annularly connecting multiple arc-shaped prefabricated concrete sheets, and the fragment mode is a vertical fragment, and after the tower cylinder sections are spliced into a ring, a section-by-section hoisting mode is adopted for staggered joint installation; through an external pre-stress steel strand,the steel tower cylinder body, the concrete tower cylinder body and the bottom disc-shaped foundation are connected; and a concrete tower cylinder conversion section is arranged at the top of the concrete tower cylinder body, the concrete tower cylinder conversion section and the steel tower cylinder section are also connected through a bolt assembly, the wall thickness of the tower cylinder of the concrete tower cylinder conversion section is gradually reduced in a transition mode according to a certain ratio, the wall thickness of the top end surface is guaranteed to be obviously larger thanthe wall thickness of a cylinder body, and the external pre-stress steel strand penetrates through the concrete tower cylinder conversion section and then enters the inner space of the concrete towercylinder body. The pre-stress steel-concrete tower cylinder has the advantages that design is reasonable, construction is simple, transportation is convenient, connection is firm, manufacturing costis low, and construction can be carried out in batches.

The invention discloses a ceramic composite material bullet-proof chest board and a preparation method thereof. The ceramic composite material bullet-proof chest board is composed of a carbon fiber composite surface rigid layer, a ceramic composite material sheet combination layer, a bullet-proof fiber composite material body layer and a back elastic surface carbon fiber composite back-convex-proof layer. The ceramic composite material sheet combination layer is made of special fiber reinforced ceramic matrix materials and is of a needling insertion type combined structure or a three-dimensional crazing-prevention framework structure; a composite cementing and micropore riveting combined technology is adopted between the ceramic composite material layer and the bullet-proof body layer; finally, the ceramic composite material sheet combination layer and the bullet-proof fiber composite material body layer are wrapped in a rigid structure composed of the carbon fiber composite surface rigid layer and the back-convex-proof layer to form a whole. The ceramic composite material bullet-proof chest board has various advantages of being light, low in back convex, stable in high and low temperature structure, long in service life and the like. Meanwhile, the problem that a seam bullet-proof characteristic in a traditional splicing structure of ceramic sheets is poor is effectively avoided, and the ceramic composite material bullet-proof chest board has the overall characteristics of multiple bullet-proof materials.

The invention discloses a buffer and walking integrated landing device. Several buffer and walking integrated mechanisms are installed on the side wall of the landing device, and each buffer and walking integrated mechanism includes a body connecting plate assembly, a mechanical leg assembly, a buffering and driving integrated primary vibration reducer, buffering and driving integrated auxiliary vibration reducers, a knee joint locking device and a foot pad. Each body connecting plate assembly has the degree of freedom on medial rotation and lateral rotation; each mechanical leg assembly has the degree of freedom on the external swinging, retraction, anteflection and backward extension of hip joints, the stretching and bending of knee joints and the like; each buffering and driving integrated primary vibration reducer, each left buffering and driving integrated auxiliary vibration reducer, and each right buffering and driving integrated auxiliary vibration reducer achieve buffering or driving between the corresponding mechanical leg assembly and the corresponding body connecting plate assembly; the knee joint locking devices achieve flexible movement. The buffer and walking integrated landing device makes up for the shortcomings of a current movable landing device in the aspects of movement flexibility, use convenience and the like, and is extremely excellent in landing device body posture control capability and obstacle surmounting capability in the movement process.

The invention relates to a distributed fiber sensor for large deformation measurement, belonging to the field of testing instruments of civil engineering. The main structure of the sensor comprises a metallic rod body and an outer-layer rubber body in which fibers are arranged, wherein a lubricating layer is arranged between the metallic rod body and the outer-layer rubber body; four fibers are arranged in the outer-layer rubber body, wherein two fibers are spirally arranged on the surface layer of the outer-layer rubber body, and the two fibers and the rubber body form an entity and deform together; and simultaneously, a preformed hole is arranged in the outer-layer rubber body, and the other two fibers are arranged in the hole and are connected into a loop for temperature compensation, thereby eliminating the influence of the temperature effect on the measurement result. In the process of measurement, the deformation of the external rock and soil mass causes the outer-layer rubber body of the sensor to deform along the axial direction; and as the fibers for measuring deformation are spirally arranged, only micro deformation is caused along the axial direction of the fibers, thereby realizing large deformation measurement. The sensor can be applied to large deformation measurement of phenomena such as settlement, slippage, delamination and the like of rock and soil mass or structures in the fields of civil engineering, mining engineering and the like, and has the advantages of convenient processing, simple structure and low manufacturing cost.