225results about How to "Uniform load distribution" patented technology

The present invention relates to a shoe, in particular a sports shoe, having a flexible upper surrounding a foot, a closure panel arranged on an instep area of the flexible upper, and a tightening element arranged at the heel of the shoe. The tightening element is connected to the closure panel such that the closure panel, through the use of the tightening element, can be tightened against the instep area of the flexible upper to retain the shoe on the foot.

The invention relates to fluorinated polyurethane nanometer composite material and a preparation method thereof. The invention combines a polycondensation co-polymerization process and fluorine-introducing ultrasonic dispersion technology in the preparation process, nanometer aluminum oxide and nanometer silicon carbide are added and compounded in homogeneous phase in the polycondensation and the co-polymerization process, thereby obtaining nanometer particle reinforced fluorinated polyurethane nanometer composite material. A coating material with micron/nanometer dual structure surface and having hydro-oleophobic, wear resistant and erosion resistant functions, is obtained after film forming by spray coating on the base, drying and curing. The coating material prepared by the method has Hydro-oleophobic performance, and satisfies heat resisting, anticorrosion and wear resistant characteristics under hypergravity or high speed impact conditions.

A crank arm assembly (1) for a bicycle, comprising a crank arm (2) and an element (3,3a) for transferring torque from the crank arm (2) to a bicycle chain. The crank arm (2) and the element (3,3a) for transferring torque respectively comprise first (25) and second (34) front coupling means provided with respective matching profiles adapted to be coupled together to transfer torque from the crank arm (2) to the element (3,3a) for transferring torque. In particular, the first and second means for transferring torque comprise respective front toothings, preferably Hirth toothings. The crank arm assembly (1) is very light and is stronger in structure than crank arm assembly known.

The invention provides a multi-dimensional force sensor calibration device with controllable poses. The multi-dimensional force sensor calibration device comprises a fixing platform, drive mechanisms, connecting rod mechanisms and a moving platform. The upper ends of the drive mechanisms and the lower ends of the connecting rod mechanisms are connected to form drive connecting rod mechanisms. The upper ends of the six drive connecting rod mechanisms are hinged to the moving platform through universal hinges, and the lower ends of the six drive connecting rod mechanisms are hinged to a fixed platform to form a six-freedom-degree parallel mechanism. The six drive connecting rod mechanisms are divided into three groups. Every two adjacent drive connecting rod mechanisms form one group and are arranged in the mode shaped like a Chinese character 'ba'. The poses of a calibration platform can be controlled and changed, and the calibration device has the function of calibrating a sensor dynamically and statically, and is complete in function, convenient to operate, high in calibration precision and capable of being well applied to practical engineering.

The invention relates to a novel composite arc bridge structure, and particularly discloses a lattice-type large-span soil-filling composite corrugated steel arch bridge structure. Sandwich mortar composite corrugated steel plates are adopted as large-span main arch rings of the composite structure. The corrugated steel plates are connected to form a reversely arranged double-layer plate through bolts, studs are arranged in an interlayer, and filled high-strength mortar forms an integral sandwich composite corrugated steel plate. Corrugated steel tubes are adopted by gastropore. Load is conveyed between the main arch rings and the gastropore by filling soil. The lattice-type large-span soil-filling composite corrugated steel arch bridge structure has the advantages of being low in weight, durable, high in strength, good in flexibility, high in performance, rapid in construction, good in economic benefit and the like, is an ideal alternative to reinforced concrete bridges, can be widely used in the construction of middle-sized bridges (20-50m), and can certainly generate good social economic benefit.

The invention provides a hybrid power coupled transmission device. The hybrid power coupled transmission device comprises a power output system and a mechanical transmission system, wherein the power output system comprises an engine, an engine output shaft, a transmission auxiliary motor, a transmission auxiliary motor output shaft, a driving motor and a driving motor output shaft; and the mechanical transmission system comprises an engine output shaft gear, a shock absorber, an engine brake, a planet gear row, a transmission auxiliary motor speed reducing gear, a transmission auxiliary motor brake, a driving motor speed reducing gear and an output shaft. The hybrid power coupled transmission device aims at solving the problems of vibration and noise caused by low speed large torque and medium and high speed of double planet gears in the power and transmission systems, the motor cooling problem and the lubrication problem of the transmission system, the overall efficiency of the power system and the transmission system is improved, and the service life of the power system and the transmission system is prolonged.

Embodiments of the present invention provide a surgical cassette with compliant clamping zones to provide more uniform loading. According to one embodiment of the present invention, a surgical cassette includes a clamping portion that is configured to deform to conform to non-uniform load profile applied to the cassette. The clamping portion can include ribs that are sized and made of a suitable material such that the ribs will deflect predictably in the elastic region and flow plastically when the material yield point is exceeded. The use of ribs creates discrete small load areas that will deflect and distort predictably and non-catastrophically at high loads. This allows for the absorption of accumulated tolerances between the clamping mechanism and cassette (e.g., the non-parallelism between the clamping mechanism and cassette) while still providing a distributed load on the cassette.

The invention discloses a device and method for plastic formation of micro parts through manual submerging type cavitation jetting. The method comprises the following steps: enabling a working fluid to flow towards a pressurizing cylinder and a speed-regulating valve through an outlet of a three-way valve, and enabling the working fluid to enter a nozzle after the pressure and flow of the workingfluid are increased; opening a stop valve, spraying nano-scale abrasive particles in a micro-sized abrasive particle tank into the nozzle to be mixed with the fluid, and spraying the fluid out throughan outlet in the lower end of the nozzle; and introducing the residual fluid in the three-way valve to enter a casing pipe from another outlet of the three-way valve through a depressurizing valve. When uniformly mixed nano-scale abrasive particles and the fluid are sprayed out from the outlet of the nozzle and collide with the low-pressure fluid in the casing pipe, strong shear is generated, anda large number of vacuoles are generated and are sprayed to to-be-machined micro parts; and cavitation jetting is combined with the nano-scale abrasive particles, a mutual promotion effect is achieved, the cavitation is promoted, the plastic formation of the micro parts is promoted, the machined positions are not cracked, and the surface polishing and strengthening effects on a formed site of a workpiece are promoted, so that the device can meet the requirements on the strength, fatigue durability and the like of the workpiece.

The invention relates to an articulated multiaxial drive and bidirectional driving electric bus, belonging to the technical field of electric bus structure. The articulated multiaxial and bidirectional driving electric bus is characterized in that a chassis frame is provided with two differential driving axles, two differential driving steering axles, a front cab and a back cab; wherein, the differential driving axles are arranged in the middle of a bus body; In the middle of the differential driving axles, a first differential motor and a second differential motor are respectively used for supplying a torque for wheels at both ends; the two axles are articulated by a bus passage turntable; the part of the bus body, where the two axles are articulated, is provided with passage soft connection matched with the bus passage turntable; the differential driving steering axles are respectively arranged at the front side and back side of the bus body. The articulated multiaxial and bidirectional driving electric bus of the invention has simple structure and convenient maintenance as well as realizes articulated connection, multiaxial drive and bidirectional driving. The adoption of the differential driving axles and differential driving steering axles reduces intermediate link, so the bus starts rapidly, which has low noise, flexible steering and saving power supply.

The invention discloses a natural twist microscopic profile correction optimization method of a worm grinding wheel grinding helical gear. A meshing model of the worm grinding wheel grinding helical gear is constructed to deduce a contact trace equation, a gear form and lead evaluation range is selected, a gear surface twisting model is established, and a gear form and lead angle deviation value is obtained under the natural twist of the worm grinding wheel grinding helical gear; the correlation detection data of an existing project is collected, a twist quantity under natural twist is calculated, whether calculation data and detection data are matched or not is verified, and a transferring error under existing natural twist is calculated; and therefore, gear microscopic profile correction parameters related to the natural twist are optimized, wherein optimization comprises the following steps of: reducing a lead drum-shaped size, regulating a mating gear drum-shaped size, regulating a mating gear twist quantity, and lowering and compensating influence brought by the natural twist of the worm grinding wheel grinding helical gear. By use of the method, gear bearing performance can be effectively improved, gear meshing impact is reduced, and transmission accuracy and a NVH (Noise Vibration and Harshness) level are improved.

The invention discloses a 1/2 type tandem-blade type transonic speed centrifugal impeller, which comprises an inducer consisting of a front row of blades and a guide wheel consisting of a back row of blades, wherein the front and the back rows of the blades have three-dimensional distorted shapes and are divided, staggered and overlapped with one another. The centrifugal impeller is characterized in that the number ratio of the front row of the blades to the back row of the blades is 1:2. In the centrifugal impeller, the front row of the blades are arranged with low consistency and the back row of the blades are arranged with high consistency so that the effective through-flow area is enlarged and the blockage flow is increased; and the evenness of the flow at the outlet of the impeller is improved so that the wake losses and the shock losses between the impeller and a diffuser are reduced, the efficiency of the whole stage is improved, and the surge margin is enlarged.

The invention relates to a technology forming method of a small and medium-sized unmanned aerial vehicle composite material outer wing. The method comprises the following steps of forming mold manufacturing, front edge silicon rubber core mold manufacturing, film bag body manufacturing, outer wing front edge manufacturing, and outer wing main body manufacturing; after surface treatment is correspondingly carried out on bonding areas corresponding to the outer wing front edge and a main body front beam surface, and structure double-sided adhesive tapes with the same shape as that of the bondingareas are tore to remove isolation paper on one sides, the adhesive surfaces are adhered to the bonding areas of the outer wing front edge, then solating films on the other sides of the structural adhesive tapes are tore, and the outer wing front edge is horizontally embedded into a boss of the corresponding position of the outer wing main body through a positioning groove at the left end of theouter wing front edge so as to obtain a composite material integral structure outer wing product. According to the technology forming method, the problem of limitation of multiple curing forming, andthe uniformity of the product quality and the thickness are improved.

The invention discloses a self-locking device and a self-locking type pre-stress anchor wire having the same. The self-locking device comprises a load bearing steel plate and a limiting steel plate, wherein the load bearing steel plate is a cylinder which is provided with a plurality of conical anchor holes; the anchor holes have a same diameter, are used for locking the anchor wire and for the anchor wire passing through and are symmetrically distributed; the anchor holes have gradually contracted conical degrees in the direction opposite to a stretching direction of the anchor wire; a clamping piece which is used for clamping the anchor wire and is matched with the anchor holes structure is arranged in the anchor holes; the limiting steel plate is of a round plate shape and is fixed on one side of the load bearing steel plate close to a big opening of the conical holes by a bolt; and a round hole which allows the anchor wire to pass through is arranged in the limiting steel plate. Based on a normal anchor wire structure, the anchor wire is locked by arranging the self-clocking device on a free section, the energy field of the free section is fully utilized and the anchor stress field distribution is improved, thereby, the self-locking type pre-stress anchor wire has the advantages of uniform load distribution, decreased counter-force structure scale, convenient construction, saved manufacturing cost, environmental protection, and the like.

The invention discloses a power-driven system and a vehicle. The power-driven system comprises a differential, a power output shaft, multiple input shafts and a first electric generator, wherein the differential comprises a first planet carrier, a second planet carrier, a first planet gear, a second planet gear, a first gear ring and a second gear ring, the first planet gear and the second planet gear are arranged on the first planet carrier and the second planet carrier respectively, the first planet gear and the second planet gear are meshed with the first gear ring and the second gear ring respectively, the second planet gear is further meshed with the first planet gear, the revolution radius of the first planet gear is different from that of the second planet gear, the power output shaft is arranged to be in linkage with the power input end of the differential, one of the multiple input shafts is arranged to be in linkage with the power output shaft in a selective mode, other input shafts are arranged to be in linkage with the power output shaft, and the first electric generator is arranged to be in linkage with the above-mentioned input shaft. The differential of the power-driven system achieves a differential function by means of a planet differential principle, and the structure is compact and simple.

The invention discloses a new multi-channel equilibrium correlation method of considering load distribution and damage consistency. The method comprises the following steps: (1) adopting rain-flow counting and zero-mean conversion methods to convert a load time process of each channel of a test field and a user into a sub-interval load spectrum; 2) converting the sub-interval load spectrum of eachchannel into fatigue damage according to a fatigue life prediction theory, and building a multi-channel sub-interval equivalent-damage correlation model; and 3) adopting a normalization method to normalize the damage of each channel sub-interval of the test field and the damage of the user corresponding channel. According to the method, load distribution consistency and damage consistency principles are comprehensively considered, consistent distribution of test field and user loads can be guaranteed, the consistent fatigue damage between a test field test and a user test can also be guaranteed, at the same time, adopting the normalization method solves the problem of poor matching equilibrium due to differences of signal types and orders of magnitude of all the channel, and a method of assigning different weights to all the channels is adopted to realize priority matching of the important channel.

The invention discloses a power driving system and a vehicle. The power driving system comprises a differential, a speed changer, an engine, a first electric generator and a second electric generator, wherein the differential is formed by an input part, a first planetary rack, a second planetary rack, a first planetary wheel, a second planetary wheel, a first tooth ring and a second tooth ring; the first and second planetary wheels are respectively connected with the first and second planetary racks; the first and second planetary wheels are engaged with the first and second tooth rings in respective; the second planetary wheel is further engaged with the first planetary wheel; the input part, the first and second planetary racks are coaxially linked; the speed changer is respectively connected with the engine and the differential; produced power can be output to the input part via the differential by the engine; and the first electric generator is linked with the first tooth ring, and the second electric generator is linked with the second tooth ring. The differential of the power driving system utilizes a planetary differential principle to achieve a differential function; and the power driving system has simple and compact structure.

The invention discloses a power-driven system and a vehicle. The power-driven system comprises a differential mechanism, a power output shaft, multiple input shafts, a first motor generator and a second motor generator. The differential mechanism is composed of an input part, a first planet carrier, a second planet carrier, first planet wheels, second planet wheels, a first gear ring and a second gear ring. The first planet wheels and the second planet wheels are connected with the first planet carrier and the second planet carrier correspondingly. The first planet wheels and the second planet wheels are engaged with the first gear ring and the second gear ring correspondingly. The second planet wheels are further engaged with the first planet wheels, and the input part, the first planet carrier and the second planet carrier are coaxially linked. The power output shaft is arranged to be linked with the input part. Each input shaft is arranged to be linked with the power output shaft. The first motor generator is linked with the first gear ring, and the second motor generator is linked with the second gear ring. The differential mechanism of the power-driven system achieves the differential function based on the planet differential principle, and the structure is compact and simple.

The invention discloses a reinforced thermal insulation decorative wall and a construction method thereof. The reinforced thermal insulation decorative wall includes an outer wall, several thermal insulation boards, a cross-shaped support frame and several buckles. Splicing is bonded on the outer surface of the outer wall, one end of the cross-shaped support frame is fixed on the outer surface of the outer wall, the other end passes through the gap of the insulation board, and the cross-shaped support frame is fixed on the outer surface of the outer wall. A buckle is connected, and the buckle is arranged on the surface of the heat preservation board along the seam direction of the heat preservation board. The invention improves the reinforcing effect of the thermal insulation board on the surface of the outer wall, and the cross-shaped support frame makes the load-bearing distribution of the thermal insulation board more uniform, has a positioning function, and is more convenient for the alignment and positioning of the thermal insulation board during installation, so that the installation position more precise. The movement of the thermal insulation board is further restricted by the buckles, and the thermal insulation board on the surface of the outer wall is further reinforced, thereby improving the safety and stability of the reinforced thermal insulation decorative wall.

The invention discloses a power driving system and a vehicle. The power driving system comprises a differential mechanism, a power output shaft, multiple input shafts, a first electric power generator and a second electric power generator. The differential mechanism is composed of an input part, a first planet carrier, a second planet carrier, a first planet gear, a second planet gear, a first gear ring and a second gear ring, wherein the first planet gear and the second planet gear are connected with the first planet carrier and the second planet carrier correspondingly and engaged with the first gear ring and the second gear ring correspondingly, the second planet gear is further engaged with the first planet gear, and the input part, the first planet carrier and the second planet carrier are in coaxial linkage. The power output shaft is arranged to be in linkage with the input part. One of the multiple input shafts is selectively in linkage with the power output shaft, and the rest of power input shafts are arranged to be in linkage with the power output shaft. The first electric power generator is in linkage with the first gear ring, and the second electric power generator is in linkage with the second gear ring. The differential mechanism of the power driving system achieves a differential function through the planet differential principle, and the structure is compact and simple.

The invention discloses a cross compression sample holder for a dual-axis loading system and a loading method and relates to the technical field of the material complex load test. The holder includesclamping ends, a loading pressing block, a pressure sensor and a base, wherein the loading pressing block is mounted above the base, the pressure sensor is arranged between the loading pressing blockand the base and is connected with a computer, the clamping ends are four, and the four clamping ends are matched with four side surfaces of the loading pressing block and are used for clamping loading arms of a cross compression sample. The holder is advantaged in that the holder can not only be applied to regular compression experiments of the cross sample, but also can be applied to pull-pressing cycle loading experiments of the cross sample, and the holder is simple in structure, is convenient for processing and maintenance and has high experiment accuracy.

The invention discloses a pressure fluctuation fatigue test device for a train door, which relates to the technical field of pressure fluctuation fatigue tests. The device comprises a test circuit, a control module and a measurement module, wherein in the test circuit, a mounting tool and a test piece are assembled, sealed test space is formed, and the mounting tool is connected with a pipeline; in the control module, a PLC directly controls a first solenoid valve and a second solenoid valve and further controls a first pneumatic valve and a second pneumatic valve, an air source provides power for the pneumatic valve, and according to test requirements, a fan is arranged at any end or two ends of the pipeline; and the measurement module is arranged on the mounting tool and the test piece. Simulation of multiple pressure differential environments formed by aerodynamic load in a lab can be realized, uniform distribution load can be applied to the test piece, the pressure difference and the test frequency can be adjusted according to actual conditions, and pressure fluctuation fatigue test requirements generated on parts such as a door and a window of a transportation means due to high-speed driving can be totally met.