38results about How to "Small vertical displacement" patented technology

An electromagnetic radiation sensor that exhibits improved performance by virtue of an ability to tune its sensitivity is disclosed. The electromagnetic radiation sensor incorporates thermal actuators that act in opposition to one another, but which have a slight difference in responsivity. A temperature controller is used to tune the sensitivity of the electromagnetic radiation sensor by controlling the temperature of the substrate on which the sensor is formed.

The invention relates to a tensile mechanism for stack rubber shock-insulating support seats, which is characterized in that stack rubber shock-insulating support seats are arranged between an upper structure and a lower structure, an upper reaction arm and a corresponding lower reaction arm are also arranged between the upper structure and the lower structure, the top end of the upper reaction arm is fixedly connected with the upper structure, and the bottom end of the lower reaction arm is fixedly connected with the lower structure; the bottom end of the other stack rubber shock-insulating support seat is connected with a cross arm of the bottom of the upper reaction arm, and the top end of the other stack rubber shock-insulating support seat is connected with a cross arm at the top of the lower reaction arm; the upper reaction arm, the lower reaction arm and the other stack rubber shock-insulating support seat form a reaction stack rubber shock-insulating support seat set. The invention has the advantages of simple structure and easy design and manufacture. The tensile mechanism can improve the tensile capability of shock-insulating layers of buildings, reduces the vertical displacement of shock-insulating layers, lowers earthquake response of the upper structure, and can be applied and popularized to large and wide structures.

The present invention aims at overcoming at least one defect of the prior art, and provides a planar sliding propulsion method of a shield machine. The propulsion method is: when the telescopic device is stretched and propelled, the resistance increasing component is activated to increase the resistance, so that the shield The acceleration of the shield machine relative to the seat plate is greater than the acceleration of the support frame relative to the ground; when the telescopic device shrinks, the resistance increasing component is activated to reduce the resistance, so that the acceleration of the shield machine relative to the seat plate is smaller than the acceleration of the support frame relative to the ground. The propulsion method of the present invention only needs to adjust the resistance of the resistance-increasing component to realize the maximum static friction force between the propulsion device and the ground during different propulsion processes, and the adjustment of the height of the resistance-increasing component can realize the sliding of the resistance-increasing component The force conversion between components is easy to operate, and the wear on the bottom of the propulsion device is reduced, and the service life is improved.

The invention belongs to the technical field of automobile fixtures, and is specifically a quick positioning fixture for special-shaped pipe fittings of automobiles, which includes a box body, a support plate, elastic parts, clamping parts and feet; The No. 1 rotating shaft and the No. 2 rotating shaft rotate in opposite directions, driving the cams on both sides to swing toward the support plate at symmetrical entry points, and driving the working surfaces of the cams on both sides to touch against the elastic retaining plate at the same time, and the elastic retaining plate and the supporting plate are tightly fitted. Realize the clamping of the support plate; the force points on both sides of the support plate are on the same plane to prevent the uneven force of the support plate from twisting; the elastic stopper prevents the cam from swinging and directly pushes the support plate, and the hinge prevents the vertical movement of the elastic stopper to prevent The support plate moves vertically; the fixed block and the positioning block can be adjusted according to the special-shaped pipe fittings, so that the fast positioning of the special-shaped pipe fittings can reduce the types of fixtures; the elastic parts make the action surface of the positioning block form a whole, and realize the rapid replacement of special-shaped pipe fittings of the same specification.

The invention discloses a large-span double-arch axis combined arch bridge, which comprises a main beam, a middle bridge pier serving as a middle fulcrum, two auxiliary bridge piers serving as two end fulcrums, an arch axis assembly and two upwards protruded arc arch axis bent beams, wherein the arch axis assembly is arranged on the middle bridge pier, two ends of the arch axis assembly are respectively butted with the inside ends of the two arch axis bent beams, the outside ends of the two arch axis bent beams are respectively arranged on the two auxiliary bridge piers, and the two arch axisbent beams are connected with the main beam through a plurality of stay ropes. The invention also discloses a construction method of the arch bridge. By adopting the double-arch axis method, the bending strength of the section of the arch bridge is greatly increased, the bending moment of the arch section at the middle fulcrum is reduced, the vertical displacement of the arch waist is low, and the deformation of the main beam is reduced, so that the whole bridge is stressed reasonably. By using the method, the construction cost can be effectively reduced, and the construction period is shortened.

The present invention provides a single-degree-of-freedom large-stroke nano-displacement positioning platform based on flexible hinges, including a platform main body. There are four flexible hinges on the platform main body, and the platform main body is divided into A zone, B zone and C zone by the four hinges. , four parts of D area, the A area is a moving area, the B area and C area are force deformation areas, and the D area is a fixed area; the two ends of the main body of the platform are provided with a left blind hole and a right blind hole, The bottom of the left blind hole is a smooth conical surface, and a spring preload assembly is installed inside it, and the bottom of the right blind hole is also a smooth conical surface, and a piezoelectric ceramic assembly is installed inside it, and the spring preload assembly is installed inside it. The component and the piezoelectric ceramic component constitute the amplification mechanism. The invention realizes relatively large vertical displacement under the condition of small vertical platform size, and can meet the requirement of occasions with small space but large vertical travel.

The invention relates to an anti-overturning composite spring three-dimensional shock-isolation support, which comprises an upper connecting plate, a lower connecting plate parallel to each other, and four inclined tie rods anti-pressure compounded between the upper connecting plate and the lower connecting plate The spring damper and four vertical pull rod anti-pressure composite spring dampers, the connecting rods at both ends of each pull rod anti-pressure composite spring damper are connected to the upper connecting plate and the lower connecting plate by universal ball joints. together; wherein, the four inclined pull rod anti-pressure composite spring dampers are connected on the upper and lower connection plates and the axes of the four inclined pull rod anti-pressure composite spring dampers together form a relative The two sides are respectively symmetrical square truss; the connection line between the connection points on the upper and lower connecting plates of the four vertical pull rods back pressure type composite spring damper and the four vertical pull rods back pressure type The axes of the composite spring damper together form a rectangular hexahedron. The support can realize real three-dimensional shock isolation.

The invention aims to overcome one or more defects in the prior art, and provides a plane sliding propelling device for a shield tunneling machine. The plane sliding propelling device comprises a supporting frame, a seat plate arranged on the upper side of the supporting frame and used for supporting the shield tunneling machine, a plurality of sliding assemblies, a plurality of resistance increasing assemblies and a counter-force device arranged at the tail end of the supporting frame, wherein the multiple sliding assemblies and the multiple resistance increasing assemblies are arranged on the lower side of the supporting frame; a telescopic device is arranged at one end of the shield tunneling machine, when the telescopic device extends for propelling, the resistance increasing assemblies are started to increase resistance, and thus the accelerated speed of the shield tunneling machine relative to the seat plate is greater than the accelerated speed of the supporting frame relative to the ground; and when the telescopic device retracts back, the resistance increasing assemblies are started to decrease the resistance, and thus the accelerated speed of the shield tunneling machinerelative to the seat plate is smaller than the accelerated speed of the supporting frame relative to the ground. According to the plane sliding propelling device, according to the different propellingprocesses, friction force between the propelling device and the ground is changed, continuous propelling can be achieved, energy consumption is further saved, and the construction cost is lowered.

The invention discloses a supporting method of a steel bridge beam and a beam-type steel bridge utilizing the same. A bridge supporting part is of a steel structure, has the advantages of light deadweight, high bearing strength and small contraction distortion adapting to the influence of temperature change, can be produced and manufactured in a plant, and is high in installation accuracy; the bottom support of the beam-type steel bridge is a fixed wheel, has the advantages of low friction, large bearing capacity, convenience in replacement and the like, and can better realize axial displacement caused by various reasons; the top of a bridge abutment and a bridge pier is provided with a large groove, so as to effectively prevent the slippage of the beam-type steel bridge; and in order to prevent a bridge bearing from lateral movement, a simply support side wheel is arranged between the lateral of the bridge bearing and the large groove and used as a lateral limiting device.

A ring-type steel corbel joint connecting a reinforced concrete column with a beamless floor, including a reinforced concrete column at a slab-column joint and a beamless floor, and a steel corbel set at the joint, within the thickness of the floor slab , between every two adjacent steel corbels, at least one steel ring is fixedly connected to the steel corbels on both sides, and the steel corbels are combined to form at least one steel ring around the reinforced concrete column, at least one of which is Steel hoops around the posts. Such a node structure has orthogonal radial steel corbels floating out from the steel ring, and the inner ring steel ring hoops the reinforced concrete column at the node, and works together with the steel corbel to form a circular radial shape. The invisible rigid column cap of the cantilever structure increases the reliable connection of the slab-column, improves the bending resistance and shear resistance of the node; when there is more than one steel ring, it can also effectively reduce the deflection of the mid-span slab.

The invention relates to an anti-overturning disc spring three-dimensional shock-isolation support, which comprises an upper connecting plate, a lower connecting plate parallel to each other, and four inclined tie rods anti-pressure type arranged between the upper connecting plate and the lower connecting plate. Disc spring damper and four vertical pull rod anti-pressure disc spring dampers, connecting rods at both ends of each pull rod anti-pressure disc spring damper and upper connecting plate and lower connecting plate are respectively connected by universal The ball joints are connected together; wherein, the line between the connection points of the four inclined tie rod back pressure disc spring dampers on the upper and lower connecting plates is the same as that of the four inclined tie rod back pressure disc spring dampers. The axes jointly form a rectangular truss shape that is respectively symmetrical to the two sides; the connecting line between the connecting points on the upper and lower connecting plates on the upper and lower connecting plates of the four vertical pull rods and the four vertical pull rods The axes of the vertical tie-rod counter-pressure disc spring dampers together form a rectangular hexahedron. The support can realize real three-dimensional shock isolation.