32results about How to "Protection from collision" patented technology

The invention provides a shock-absorbing device of a shockproof joint, and the shock-absorbing device comprises a left shock-absorbing unit and a right shock-absorbing unit which are symmetrically arranged on concrete structures at two sides of the shockproof joint, wherein the left shock-absorbing unit and the right shock-absorbing unit comprise steel barrels with inner sides which are embedded into the concrete structures; each steel barrel is internally provided with a piston with a piston rod, and a spherical steel cover plate is arranged at the outer end of each piston rod; a spring is arranged between each spherical steel cover plate and each concrete structure; the outer edge of each steel barrel is level with each concrete structure and is fixedly arranged through arranging an annular steel barrel cover plate; a spring is arranged between each spherical steel cover plate and each annular steel barrel cover plate; and the outer end of each piston rod is at least provided with two layers of spherical steel cover plates. According to the invention, the collision effect on buildings under an earthquake action is reduced, the buildings are prevented from being damaged, the construction is simple and the construction cost is low.

Aiming at the fact that most of in existing research results, only human-vehicle collision damage is protected, the invention designs an engine cover for protecting human-vehicle and human-ground collision damage. The engine cover consists of a supporting layer, an air bag layer and a protective layer, wherein the air bag layer comprises three hedgehog-shaped air bags. When an accident is detectedto be unavoidable, the air bag layer is detonated and completely brakes until the head of a human body collides with a vehicle body for the first time, the speed of the vehicle is controlled to enable the rear edge of the engine cover to keep a certain distance from the chest of the human body and the engine cover and the human body move together, and when the human body collides with the enginecover again, the air bag layer completely brakes again until the human body is in a fixed state. The engine cover has the beneficial effects that by detonating the air bag layer, the hedgehog-shaped air bags cover a vehicle head so as to reduce human-vehicle direct collision force, and meanwhile, the ejection speed of a pedestrian is reduced by barb-shaped air columns; and the vehicle head catchesthe human body by moving the vehicle, and the falling speed of the human body is reduced by the air columns on the outer surfaces of the air bags to further consume potential energy and kinetic energy of the human body, so that human-ground collision speed is reduced, and human-vehicle collision protection and human-ground collision protection are realized simultaneously.

The invention relates to a large-span steel-concrete composite bridge large-section steel truss girder erecting system which comprises a near-tower end girder erecting system and a steel truss girderassembling system. The near-tower end beam erecting system comprises a main tower gantry, an auxiliary hole traction system, a pulley block and a temporary sling. The steel truss girder assembling system is mainly composed of a cable crane walking mechanism, an auxiliary hole traction system and a connecting panel. The main tower gantry comprises stand columns and a gantry main truss. The auxiliary hole traction system is installed on an operation platform and connects and fixes the two ends of a main cable. The cable crane walking mechanism is installed on the main cable, and the top of the cable crane walking mechanism is suspended to the gantry main truss at the top of the main tower gantry through a steel wire rope. The system has the beneficial effects that an easy-to-disassemble anti-collision frame is arranged on the outer side of the auxiliary hole traction system, the traction system can be protected against collision during operation, and the anti-collision frame is simple instructure, low in manufacturing cost and convenient to assemble and disassemble.

The invention discloses a fully-covered anti-collision protection device for an observation window of a manned submersible and relates to the field of manned submersibles. The device is arranged through a self structure, so that the pressure inside a cavity is balanced with the ambient pressure, therefore, the anti-collision protection device is in a normal stress state under a high-pressure environment, and can protect various hard objects from collision with the observation window in a high stress state within a wide range from all directions and perform omni-directional protection on the safety of the observation window; in the normal state, an observed object can be approached by a glass sealing cover on the collision protection device, so that an observation effect can be effectivelyenhanced.

The invention relates to an anticorrosion and anti-collision steel ball valve structure. The anticorrosion and anti-collision steel ball valve structure comprises a main valve body. An auxiliary valve body is arranged in the main valve body. Valve seats are arranged on the auxiliary valve body. Two valve seats are arranged. A ball body is arranged between the two valve seats. A valve rod is arranged at the top of the ball body. The valve rod is arranged on a valve rod seat on the main valve body. Anticorrosion and anti-collision polyethylene (PE) coatings are arranged on the surface of the main valve body and the surface of the auxiliary valve body. The anticorrosion and anti-collision PE coatings are integrally formed through injection molding. By the adoption of the structure, the anticorrosion and anti-collision PE coatings are arranged on the surface of the main valve body and the surface of the auxiliary valve body in an injection molding mode and the thickness of the anticorrosion and anti-collision coatings is greater than or equal to 5 mm, and the anticorrosion and anti-collision PE coatings are made of PE plastic, so that the metal surfaces of the valve are effectively protected from corrosion and collision.

The invention provides an anti-rotating piston kinematic pair barrel for a large-size marine application device. The anti-rotating piston kinematic pair barrel comprises a ducted barrel body, a work barrel body and a limiting barrel body. The end surface of the ducted barrel body, the end surface of the work barrel body and the end surface of the limiting barrel body are all provided with annular connection plates. The ducted barrel body, the work barrel body and the limiting barrel body are coaxially connected and fixed in sequence by fixing the annular connection plates through sets of bolts. A center guide shaft penetrates through the circle center position of the ducted barrel body and the circle center position of the limiting barrel body, and the ducted barrel body and the limiting barrel body are fixed through the center guide shaft. A plurality of limiting shock-absorbing seats uniformly distributed along a circumference are fixed to the end surface, close to one end of the work barrel body, of the limiting barrel body. According to the anti-rotating piston kinematic pair barrel for the large-size marine application device, the center guide shaft is used for positioning, so that the operation resistance of a work chamber piston can be well reduced; and accordingly, the piston can be better protected from colliding with the barrel bodies, and the reliability performance and the anti-corrosion performance of a piston kinematic pair in sea water are improved.

Aiming at the reality that most of the existing research results only protect people and vehicles from collision damage, the present invention designs a working method for the hood of an intelligent car to protect pedestrians. By detonating the airbag layer of the hood, the front of the car is covered with a hedgehog-shaped airbag to reduce the direct collision force between people and vehicles. At the same time, the barb-shaped air column on the outside of the airbag slows down the speed at which pedestrians are thrown out, achieving direct protection for people and vehicles. At the same time, it consumes the kinetic energy obtained by the human body from the car body; and then moves the vehicle so that the front of the car catches the human body, and the air column on the outside of the airbag delays the falling speed of the human body to further consume the potential energy and kinetic energy of the human body, thereby reducing the collision speed between the human body and the ground. Car and human-ground collision protection at the same time.

The invention relates to the technical field of smart home appliances, and discloses a robot dust collection device that is convenient for cleaning dead corners. The inside of the outer casing is provided with a storage slot, the top of the storage slot is movably connected with a fine brush, the bottom of the fine brush is movably connected with a limit pin, and the outside of the limit pin is movably connected with a chassis, the The inside of the chassis is movably connected with a universal wheel, the interior of the universal wheel is movably connected with a limit rod, the right side of the limit rod is movably connected with a movable rod, and the top of the movable rod is movably connected with a connecting rod. Through the cooperation of the dust collection box and the dust collection box, when the dust inside the dust collection box reaches a certain amount, the device will reach the set position, and the internal dust will be discharged through the dust outlet pipe, so that it will not affect the continuous work and is practical. higher.

The invention discloses a wrapping type pedestrian safety air bag which comprises a first buffering protection part and a second buffering protection part which are arranged on an automobile engine hood, used for protecting a collided pedestrian and electrically connected with an automobile AEB system. The time-difference pedestrian safety air bag is simple in structure, convenient to replace after being triggered and high in reliability, the air bag which is popped out of the left mudguard or the right mudguard firstly covers an engine hood and a windshield, and therefore collision damage caused by the fact that the left mudguard and the right mudguard make contact with collided pedestrians can be reduced; and secondary injury caused by collided pedestrians and the ground is avoided.

The invention discloses a fully-covered anti-collision protection device for an observation window of a manned submersible and relates to the field of manned submersibles. The device is arranged through a self structure, so that the pressure inside a cavity is balanced with the ambient pressure, therefore, the anti-collision protection device is in a normal stress state under a high-pressure environment, and can protect various hard objects from collision with the observation window in a high stress state within a wide range from all directions and perform omni-directional protection on the safety of the observation window; in the normal state, an observed object can be approached by a glass sealing cover on the collision protection device, so that an observation effect can be effectivelyenhanced.

The invention relates to the field of 3D printers, and in particular relates to a device and a method suitable for automatically recognizing a curved surface initial position by a 3D printer. The technical aim of the invention is realized by using the following technical schemes: the device suitable for automatically recognizing the curved surface initial position of the 3D printer comprises a worktable for placing a printing model, and a spray head for spraying a material to form a model on the worktable, and further comprises an X-axle bracket arranged above and parallel to the worktable, an X-axle movement device connected with the spray head, and a Z-axle movement device connected with the X-axle bracket and capable of enabling the X-axle bracket to slide in the vertical direction. The invention aims at providing the device and the method suitable for automatically recognizing the curved surface initial position by the 3D printer, partition multipoints of the printing spray head and the worktable are touched so as to obtain an initial Z0 position, not only is the inconvenience of manual regulation avoided, is the efficiency promoted, but also the printing on the curved surface can be realized.

The invention discloses a tower type hoisting device for effectively relieving cargo boom connecting bolt rust. The tower type hoisting device comprises a foundation fixing device, a supporting arm, aprotection device and protection shells. The supporting am is vertically arranged at the top end of the foundation fixing device. The top end of the part, at the outer portion of the supporting arm,of the foundation fixing device is provided with the protection device. An operation chamber is arranged at the top end of the front face of the supporting arm. Cargo booms are transversely fixed to the top end of the part, behind the operation chamber, of the supporting arm. The cargo booms are fixedly connected through connecting rods. The top ends of the parts, at the connecting positions of the cargo booms and the connecting rods, of the cargo booms are provided with the protection shells. Anti-corrosion paint is arranged at one ends in the protection shells. By means of the tower type hoisting device, rust of cargo boom connecting bolts can be effectively relieved, and the service life of the connecting bolts is prolonged; meanwhile, through the arrangement of the foundation fixing device, stability and safety of the device are improved; and through the arrangement of the protection device, the device is effectively protected against collisions.

The invention provides an anti-rotating piston rectilinear motion pair applied to large-scale marine device engineering. The anti-rotating piston rectilinear motion pair comprises an upper cylinder frame, a piston base body, a center guide shaft, an arc-shaped pressing plate, an arc-shaped sealing vane, pull shafts, a lower cylinder frame, a connecting frame, nuts, pin shafts and rollers; the upper cylinder frame and the lower cylinder frame are connected and fixed up and down to form a cylinder, the center guide shaft is fixed to the central position between the upper cylinder frame and the lower cylinder frame, and the center guide shaft penetrates through the central position between the two end faces of the piston base body. The running resistance to a piston can be well reduced, the piston and the cylinder can be better protected against collision, and the reliability and corrosion resistance of the piston motion pair in seawater are improved; due to the fact that a guide sleeve is limited by the four pull shafts and the lower cylinder frame, change of the positions of the piston and the cylinder in the radial direction is well limited, and the some special requirements for directional running of the piston can be met.

The invention relates to a shakeproof express service packaging bag and belongs to the technical field of compound soft packaging. The shakeproof express service packaging bag comprises a bag body; a layer of air column bag is arranged inside the bag body; the air column bag is of a three edge sealed structure; the lower edge of the air column bag is heat-sealed at the bottom of the sealed edge of the bag body; the air column bag is transversely set into a plurality of columnar strips in parallel; inflating passages are formed between the columnar strips; the upper ends of the inflating passages are connected with air injection nozzles. The shakeproof express service packaging bag has a simple structure, is convenient to make, is low in cost and has a good buffering effect when being used for packaging fragile products; the air column bag is tightly arranged inside the bag body; after goods are packaged, the air column bag is full filled with air by the air injection nozzles, so that the goods can be protected from being squeezed or collided; the packaging process is simple, rapid and convenient; the occupied space is small.