45results about How to "Ease of engineering" patented technology

The invention discloses a single-degree-of-freedom overconstrained shear-type deployable unit and space deployable mechanisms composed of the same. The single-degree-of-freedom overconstrained shear-type deployable unit comprises eight disc chucks, four sets of shear fork folding rods and eight sets of folding connecting rods; one set of the folding connecting rods limit the deployable degree of the basic deployable units by depending on the length of the connecting rods, the other seven sets of the folding connecting rods are all overconstrained connecting rods, and the overconstrained connecting rods can effectively improve the rigidity of the basic deployable units. Accordingly, the basic deployable units can be sequentially arranged in order, every two adjacent deployable units can form the first space deployable mechanism and the second space deployable mechanism by sharing four of the disc chucks and one set of the shear fork folding rods, and the length of the first space deployable mechanism and the size of the second space deployable mechanism can be changed by changing the quantity of the basic deployable units. The single-degree-of-freedom overconstrained shear-type deployable unit is simple in structure, has the high structural symmetry and is suitable for constructing an extendable space mast, a solar battery array support and a satellite plane reflecting antenna.

The invention discloses a preparation method of polyvinylidene fluoride modified film, which has the technique comprising the following steps of: 1. designing the following components of casting film liquid by weight percent: 14-18% of PVDF, 2-6% of PAN, 4-12% of pore-forming agent and 68-76% of solvent, wherein the pore-forming agent is soluble polymer including polyethylene glycol, and the solvent is good solvent of PVDF and PAN and comprises dimethyl acetyl amide, dimethyl formamide or dimethyl sulfoxide; stirring the components in water bath at 60-70 DEG C for 3-4h, carrying out vacuum defoamation, and obtaining the casting film liquid; 2. manufacturing the casting film liquid into a flat-plat film at the room temperature, then immediately dipping into coagulating bath, maintaining for 24h and curing for molding; and 3. putting the flat-plat film into sodium hydroxide solution with the mass concentration of 8-12%, and treating at 50-60 DEG C for 1-2h; or putting the flat-plat film into sulfuric acid solution with the mass concentration of 40-50%, and treating at 80-100 DEG C for 3-4h; and then, washing the film until neutrality, and obtaining the polyvinylidene fluoride modified film.

Belonging to the technical field of preparation of aluminum based composite materials, the invention especially relates to a laser weldable aluminum based composite material and a preparation method thereof. The method provided by the invention includes: mixing silicon powder and aluminum powder according to a proportion in a mixing tank uniformly to obtain a powder mixture, and subjecting the powder mixture to cold isostatic pressing, high temperature and high vacuum degassing, and hot isostatic pressing densification treatment, thus obtaining the 100% compact, and internally imporous Si/Al composite billet. The method provided by the invention has the advantages of simple and stable process and low cost, and is one of the preferred methods for preparation of preparation of high reliability and stable quality packaging materials. The Si/Al composite material prepared by the method not only has the characteristics of light weight, low expansion and high thermal conductivity, but also has high and stable mechanical properties, especially has the characteristics of good laser welding technological properties and high air tightness, thus being an advanced aluminum based composite material with an integrated functional structure. And the material can be applied as a hermetic encapsulation shell for microelectronic devices and photoelectric devices.

A 9RR-12URU-3URU symmetrical extendable basic unit mechanism includes 10 face plates, 9 swing rods with equal lengths, 6 folded rods I, 6 folded rods II, 3 folded rods III, 33 revolute pairs (R) and 30 Hooke joints (U). Six of the face plates at the periphery in the upper layer are connected with the central face plate through the folded rods I and are connected with each other through the folded rods II. Three of the face plates in the lower layer are connected to each other through the folded rods III. Each of the folded rods is formed by connecting two connecting rods of equal lengths through one of the revolute pairs, and two ends of the folded rod are connected with the face plates through the Hooke joints. Each of the face plates in the lower layer is connected with the central face plate and two of the face plates at the periphery in the upper layer through three of the swing rods. Two ends of each swing rod are connected with the face plates through the revolute pairs. The central face plate and the face plates at the periphery in the upper layer are on the same spherical surface and form a regular hexagon with the face plates at the periphery as vertices. The mechanism is simple in structure, high in rigid, and easy for implementation of engineering manufacture. The mechanism can fold all face plates simultaneously and can adjust the folded face plate attitudes, and has a high folding ratio.

The invention discloses a hybrid scissors-forks type extensible antenna mechanism of a double-layer ring-shaped truss. The hybrid scissors-forks type extensible antenna mechanism mainly comprises an inner-layer ring-shaped truss assembly, an outer-layer ring-shaped truss assembly, a central fixed scissors type connecting assembly and a central movable scissors type connecting assembly, wherein theinner-layer ring-shaped truss assembly comprises n inner-layer folding and stretching units; the outer-layer ring-shaped truss assembly comprises 2n outer-layer folding and stretching units; the central fixed scissors type connecting assembly comprises n fixed scissors type folding and stretching units and n/2 central movable scissors type folding and stretching units; upper and lower four inner-layer disk chucks at the two sides of the inner-layer folding and stretching units and upper and lower six outer-layer disk chucks of corresponding two outer-layer folding and stretching units definethe double-layer ring-shaped truss mechanism through two central fixed scissors type folding and stretching units and one central movable scissors type folding and stretching unit. The hybrid scissors-forks type extensible antenna mechanism is simple in implementation way, is high in reliability, has the advantages of being flexible in movement and relatively great in folding, and can be applied to a communication satellite, a space station and a space detector.

The invention discloses a high beam and low beam integrated LED headlamp. The high beam and low beam integrated LED headlamp comprises an LED light source, a lens set, a light distributing unit, a movable cut-off light barrier and a collecting lens which are sequentially arranged, wherein the focus of the lens set is on an optical axis of the corresponding LED light source; the light distributing unit and the movable cut-off light barrier are correspondingly positioned at the upper side and the lower side of the optical axis of the LED light source. The high beam and low beam integrated LED headlamp is simple in structure, and low in cost, and meets the demand of a high beam and a low beam.

The invention discloses a scissor-like frame linkage over-constraint double-layer annular truss deployable antenna mechanism which mainly comprises an inner annular truss component, an outer annular truss component and an inner and outer truss connecting component. The inner annular truss component comprises n inner folding and unfolding units, two adjacent inner folding and unfolding units are connected through an upper inner flower disc and a lower inner flower disc which are shared, the outer annular truss component comprises 2n outer folding and unfolding units, two adjacent outer foldingand unfolding units are connected through an upper outer flower disc and a lower outer flower disc which are shared, the inner and outer truss connecting component comprises 2n middle folding and unfolding units, the inner annular truss component and the outer annular truss component are concentrically arranged, and the upper inner flower disc and the lower inner flower disc of each side of each inner folding and unfolding unit are connected with the upper outer flower disc and the lower outer flower disc of each side of the corresponding outer folding and unfolding unit through the middle folding and unfolding units. The antenna mechanism has the advantages of high stiffness and reliability and simple structure and is applied to communication satellites, space stations and space detectors.

The invention discloses an electromagnetic assisted braking system and a vehicle with the electromagnetic assisted braking system. The electromagnetic assisted braking system comprises an operating device, a control lever and an electromagnetic assisted device, the operating device comprises a braking pedal, and the braking pedal can rotate around a braking pedal rotating axis; the control lever is connected with the braking pedal and used for transferring the braking force of the braking pedal to a braking master cylinder; the electromagnetic assisted device is in linkage with the braking pedal, and thereby when a driver steps on the braking pedal, an electromagnetic assisted force in a same direction as the braking force is applied to the control lever. According to the electromagnetic assisted braking system, an electromagnetic structure is adopted to achieve the assisted force of the braking pedal, the structure is simple, the performance is stable, the cost is low, the maintenanceis convenient, engineering is implemented easily, the electromagnetic action is used to make the driver use less force, thus the braking of the vehicle can be achieved conveniently, and the driving safety is facilitated.

The invention discloses a rainwater abandonment system, which includes a rainwater confluence pipe, a side flow sampling pipe, a sewage pipe, a rainwater abandonment device, a rainwater collection pipe, a rainwater storage tank and a waste flow control box, wherein: the side flow sampling pipe and The rainwater confluence pipe is cross-connected, and its input end is equipped with a water quality analyzer, and the output end is connected to the sewage pipe; the rainwater abandonment device is provided with a water inlet, a water outlet and a sewage outlet, and the water inlet is connected to the output end of the rainwater confluence pipe. The water outlet is connected to the input end of the rainwater collection pipe, the sewage outlet is connected to the input end of the sewage pipe, and the output end of the sewage pipe is provided with a sewage valve; the liquid level gauge is installed in the rainwater storage tank and connected to the output end of the rainwater collection pipe ; The waste flow controller controls the opening and closing of the rainwater waste flow device and the blowdown valve according to the detection results of the water quality analyzer and the liquid level gauge. The invention solves the problem that the initial runoff rainwater and excess rainwater enter water storage equipment or structures, and avoids the potential safety hazards of confluence of rain and sewage and overflow of excess rainwater.

The invention provides a comprehensive recycling device and method for asphalt pavement resources, and belongs to the technical field of aggregate and asphalt recycling. The system comprises a storagebin, an ore feeder, a crusher, a belt conveyor, a mill, wet-type screening equipment, a coarse-grained aggregate product conveying belt, a ball mill, coarse-fine grading equipment, a stirring barrel,solid-liquid separation equipment and flotation equipment; and asphalt concrete of an asphalt pavement is fed into the storage bin, the storage bin is connected with the ore feeder, the ore feeder feeds the asphalt concrete into the crusher, a crushed product is fed into the mill through the belt conveyor, obtained ore pulp is screened through the wet-type screening equipment, and an obtained screened material is fed into the ball mill for grinding and flotation. According to the device and the method, comprehensive recycling of coarse-grained aggregate, medium-grained aggregate, fine-grainedaggregate and asphalt concentrate of the asphalt pavement resources can be realized, and recycled asphalt is high in grade and excellent in aggregate performance; and the method is conveniently to realize engineering, water resource saving and environmental protection are realized through washing water closed circulation, and the method has good social, economic and environmental benefits.

The invention discloses interface interlocking/rib reinforced laminated armor aluminum alloy and a preparation method thereof. The laminated armor aluminum alloy is formed by extruding, combining and rolling a back plate, a middle plate and a face plate. The laminated armor aluminum alloy is provided with a spatial interface with interlocked components, and a rib structure is arranged in the rolling direction. The preparation method comprises the following steps that 1) cast ingots on the back plate, the middle plate and the face plate are extruded into a prefabricated blanks with a big-end-up cavity, a prefabricated blank with an n-shaped structure and a prefabricated blank with a big-end-up rib structure correspondingly; 2) surface treatment is carried out on the prefabricated blanks; 3) the face plate, the middle plate and the back plate are extruded and combined; (4) the combined blanks are rolled and combined; and 5) solid solution and aging treatment is conducted. The interface bonding strength is increased through interface interlocking between the laminated armor aluminum alloy components, and interlayer cracking can be prevented. The rib structure improves the strength, rigidity and elasticity resistance of the plates. The preparation method is convenient to operate and beneficial to industrial production.

The invention discloses a mechanical power assisted braking system and a vehicle. The mechanical power assisted braking system comprises an operation device, an executing device and a mechanical powerassisting device, wherein the operation device comprises a brake pedal; the brake pedal can rotate around the rotation axis of the brake pedal; the executing device comprises an executing rod; the mechanical power assisting device is fitted between the operation device and the executing device; and the mechanical power assisting device is constructed as a lever type structure so that a braking force from the brake pedal is output to the executing rod under an amplifying effect of a lever. According to the mechanical power assisted braking system, the power assisting of the brake pedal is realized by using a mechanical structure; the structure is simple; the performance is stable; the cost is low; the maintenance is convenient; the engineering is easy to realize; and moreover, by using a lever labor-saving principle, a driver can brake the vehicle with smaller force so that the mechanical power assisted braking system is beneficial for running safety.

The invention discloses an embedded large-diameter concrete cylindrical structure and a construction method thereof. The cylindrical structure comprises a cylinder body, an annular substitute, a cylinder boot and a plurality of force transmission rods, wherein the cylinder body is of a reinforced concrete cylindrical structure; the annular substitute is installed above an upper end opening of the cylinder body and is collinear with the central axis of the cylinder body; the cylinder boot is fixedly installed at a lower end opening of the cylinder body, and the lower end of the cylinder boot is provided with a blade part; and the force transmission rods are arranged in the cylinder wall of the cylinder body, the central axes of the force transmission rods are parallel to the central axis of the cylinder body, the upper end parts and the lower end parts of the force transmission rods are fixedly connected with the annular substitute and the cylinder boot correspondingly, and the force transmission rods are uniformly arranged in the circumferential direction of the end opening of the cylinder body. The structure can replace a conventional steel cylinder revetment, the construction cost can be effectively reduced while the use requirements of a cylindrical revetment structure are met, and the structure has the advantages of being high in durability, rapid in construction, easy to manufacture in an engineering mode, small in influence on the environment and the like.