75results about How to "Realize force" patented technology

The invention discloses a test device for simulating tunnel active fault crossing. The test device comprises a fixed box body (left half box), a movable box body (right half box), a rigid base, a rolling shaft support, a movable steel plate and a crank sliding block loading device. A motor drives the crank to move, and then a connecting rod pushes the sliding block, so that the right disc of the model box can be driven to move unidirectionally and repeatedly. Different fault dislocation rates can be simulated by adjusting the rotating speed of the motor. By adjusting the relative proportion ofthe lengths of the crank and the connecting rod, different fault dislocation amounts can be applied. According to the device, simulation of surrounding rock at the bottom of the urban shallow-buriedsubway tunnel can be realized, and subway tunnel simulation at different dislocation rates can also be simulated. In addition, the test device can simulate the stress conditions of tunnels with different burial depths, different tunnel bottom surrounding rock properties and different fault and tunnel included angle crossing active faults.

The invention discloses a water-based heat-fluid-solid coupling true triaxial shear seepage test apparatus for coal body and a test method using the apparatus. According to the test apparatus, on the basis of the prior art, a true triaxial test box with a separated structure is employed, and two rubber pallets each possessing a special structure matched with the test box are employed, so that the simulation authenticity, accuracy and reliability are substantially improved during shear deformation operation of a test piece, and monitoring is facilitated. According to the test apparatus, because the to-be tested test piece is subjected to the force along the three axial directions of a stereo coordinate system, the test apparatus is a true triaxial shear seepage test apparatus in a real sense. Compared with the prior art, the test method using the test apparatus is high in simulation degree, and possesses the characteristics of true and accurate result, good reliability and the like.

The invention relates to a bevel gear assembly gap measuring device which comprises a casing, a measuring mechanism and a fixing mechanism. Supports of the measuring c and the fixing mechanism are installed on the casing, the middles of the supports are provided with hollow adjusting swivel nuts through threads, gear shafts are installed on the casing and penetrate through the adjusting swivel nuts, measuring arms are further fixed on the gear shafts of the measuring mechanism, numerical reading plates are arranged on the supports, and a mechanism for fixing the gear shafts is further arranged on the support of the fixing numerical reading. By designing a fixing system and a measuring system and arranging springs on two sides of each adjusting swivel nut, bidirectional variable-value stress application of a bevel gear pair is achieved, force application is jointly ensured to be achieved according to assembling technological requirements, and the requirements for fixing and gap measurement during the bidirectional variable-value stress application of the bevel gear pair are met.

The invention provides a diagrid sleeve structure for restricting connection of high strength concrete nodes, relates to a diagrid sleeve structure in the field of civil engineering, and aims to solve the problems that the conventional reinforced concrete node with the diagrid sleeve structure has lower bearing capacity and high brittleness, is difficult to meet the basic requirements of strong nodes and weak components, and the like. In the structure, the upper end of each reinforced concrete column is connected with lower ends of two reinforced concrete counter braces through a high-strength concrete brace conversion node; every two high-strength concrete brace conversion restriction nodes are connected through a reinforced concrete gird; every four reinforced concrete counter braces are connected through a high-strength concrete vertical surface restriction cross node; every two high-strength concrete vertical surface restriction cross nodes are connected through a reinforced concrete gird to form a diagrid vertical surface; and the diagrid vertical surfaces in two adjacent directions are connected through a high-strength concrete space joint node to form the diagrid sleeve structure. The diagrid sleeve structure can be used for an outer sleeve of a super-high rise tube in a tube structure.

The invention discloses a gas-based heat-fluid-solid coupled coal body true-triaxial shearing percolation experimental device and its experimental method. Based on the prior art, the experimental device adopts a separate-structured true-triaxial experimental box and a special-structured rubber tray which matches the experimental box. Thus, during the test-piece shear deformation operation, authenticity, accuracy and reliability of simulation will be greatly raised, and it is convenient to monitor. According to the experimental device, a test-piece to be detected exerts a force simultaneously in triaxial directions of a three-dimensional coordinate system. Therefore, the experimental device is truly a true-triaxial shearing percolation experimental device. In comparison with the prior art, the experimental method has characteristics of high simulation degree, real and accurate detection result, good reliability and the like.

The invention discloses a heat-fluid-solid coupled coal body true-triaxial shearing percolation experimental device for various mediums and an experimental method thereof. Based on the prior art, the experimental device adopts a separate-structured true-triaxial experimental box and a special-structured rubber tray which matches the experimental box. Thus, during the test-piece shear deformation operation, authenticity, accuracy and reliability of simulation will be greatly raised, and it is convenient to monitor. According to the experimental device, a test-piece to be detected exerts a force simultaneously in triaxial directions of a three-dimensional coordinate system. Therefore, the experimental device is truly a true-triaxial shearing percolation experimental device. In addition, the experimental device can be used for a gas heat-fluid-solid coupled coal body true-triaxial shearing percolation experiment and also can be used for a liquid (water) heat-fluid-solid coupled coal body true-triaxial shearing percolation experiment. In comparison with the prior art, the experimental method has characteristics of high simulation degree, real and accurate detection result, good reliability and the like.

The invention discloses an integrated involute rocker arm electric steering gear which comprises a steering gear housing, a motor stator, a planetary roller screw reducer, a motor front bearing, a front end cover, a motor rear bearing, a rear end cover, an involute rocker arm and an integrated rudder. The electric steering gear adopts an integrated steering gear shell design, and the motor, the planetary roller screw reducer, a screw driving shaft and control surface mounting holes are all disposed on the integrated steering gear housing; a motor rotor is also a screw nut of the planetary roller screw reducer, so that the problems that a previous control surface driving mechanism has complex structure, large size and large mass are solved; in addition, a linear rocker arm is changed into the involute rocker arm, thereby ensuring that an acting force between the screw driving shaft and the involute rocker arm is constant, and also ensuring that a stroke of the screw driving shaft and adeflection angle of a control surface are in a linear relationship; the problem of nonlinear fluttering of conventional control surface driving is solved. Compared with the structural design of a traditional steering gear, the structural design of the electric steering gear has a length reduction of about 20% and a weight reduction of about 20%.

The invention belongs to the field of bridge piers, and particularly relates to an anti-overturning bridge pier structure. A mounting plate is fixedly mounted at the top of a stand column on a base; abridge is fixedly mounted at the top of a support in the center of the top of the mounting plate; the top of the mounting plate is fixedly provided with two pieces of symmetrically-arranged I-shapedsteel, and the top of each piece of the I-shaped steel is fixedly mounted with the bottom of the bridge; the two pieces of I-shaped steel are respectively positioned on two sides of the support; the top of the mounting plate is fixedly provided with two pieces of arc-shaped steel which are symmetrically arranged; shearing force assemblies are fixedly mounted at the top of the two pieces of arc-shaped steel; the top of each of the two shearing force assemblies is fixedly mounted with the bottom of the bridge; anti-overturning bases are fixedly mounted at two sides of the stand column; two symmetrically-arranged inclined supports are movably mounted at the top of each anti-overturning base; and the top parts of the two inclined supports located on the same side are fixedly mounted with the bottom of the mounting plate. The problems that the connection tightness of the bridge and the mounting plate is not high, the connection strength of the mounting plate and the stand column is low, andconsequently the anti-overturning capacity of the bridge is poor are solved.

The invention discloses a material fetching device with material rake structures. The material fetching device comprises a main beam, a sliding device, material rake bodies and drawing structures. The slide device is mounted on the main beam and can slide along the main beam in a left-right reciprocating manner under the effect of a driving device, the material rake bodies are connected onto the slide device via a left hinge structure and a right hinge structure in such a manner that the material rake bodies can rotate around hinged shafts, and the drawing structures are arranged among the material rake bodies and the slide device and can drive the material rake bodies to rotate; two contact spherical surfaces are further fixedly arranged at the hinge structures, arc-shaped surfaces of the contact spherical surfaces face the ends of the hinged shafts and are butted to the ends of the hinged shafts, the contact spherical surface which corresponds to the left hinge structure is arranged at the right end of the left hinge structure, and the contact spherical surface which corresponds to the right hinge structure is arranged at the left end of the right hinge structure. The material rake bodies slightly deform under the effect of rightward resistance when moving leftwards, a small gap is formed between the left hinged shaft and the corresponding contact spherical surface, the right hinged shaft is tightly butted to the corresponding contact spherical surface, accordingly, the resistance can be transmitted to the slide device, and vice versa. The material fetching device has the advantages that stress on the material rake bodies can be improved, accordingly, the fatigue resistance of the material rake bodies can be enhanced, and the service lives of the material rake bodies can be prolonged.

The invention discloses a model for simulating the stress state of concrete and a test method, and belongs to the field of concrete structure simulation tests. According to the model, corresponding stress distribution is generated on a wet joint interface of the model through a method of generating eccentric tension prestress through eccentric arrangement of prestressed twisted steel, a convex cross section is adopted so that pressure stress can be more easily concentrated on the top face of a web and tensile stress can be more easily concentrated on the bottom face of a flange plate, and therefore, a large-numerical-value tensile-compressive-stress ratio can be generated through a small-size model, and the tensile-compressive-stress states of various large bridges and buildings can be simulated. The stress distribution mode and the stress magnitude of the model section can be accurately controlled by adjusting the size of the model section, the prestress tensioning force and the position of the prestress twisted steel relative to the neutral axis section, and then the tension and compression stress state of the actual prefabricated assembled bridge wet joint construction stage issimulated. The model and the test method can be used for researching the rigidity, strength and stress mechanism of a precast concrete wet joint.

The invention discloses a fluid-solid coupling method for the opening process of a pressure release valve of a pressure stabilizer. The fluid-solid coupling method comprises the following steps: establishing a simplified geometric model of a safety valve of the pressure stabilizer; respectively carrying out mesh generation on the solid region and the fluid region of the safety valve of the voltagestabilizer to obtain a mesh model of each part; controlling the stress state of the valve to be changed from a closed state to an open state through a user-defined function; carrying out steam flow characteristic calculation in the pressure stabilizer pressure release valve fluid domain grid model range, and carrying out solid mechanical vibration behavior calculation in the solid domain grid model range; achieving bidirectional coupling calculation of the same time step length of the mechanical behavior and the grid displacement through a fluid-solid coupling platform; and adopting a fluid-solid coupling platform is adopted to achieve dynamic flow field analysis inside the pressure release valve of the pressure stabilizer and mechanical behavior analysis of a solid region.

The present disclosure provides a redundant robotic arm control method, a redundant robotic arm, and a computer readable storage medium. The method includes: obtaining an external force acting on an end of the robotic arm and an external torque acting on each joint; calculating a first joint speed of each joint based on a degree of influence of the joint on the end in each motion dimension and the external force acting on the end; determining a zero space speed of each joint corresponding to a current position of the end based on a link torque of an external force acting on a link with respect to the joint; calculating a total joint speed based on the first joint speed and the zero space speed; and controlling the robotic arm to the move according to the total joint speed.

The invention discloses an automatic metal pipe bending device for mechanical equipment machining. The device comprises a fixed plate, fixed blocks, an adjusting shaft and a power box, wherein threaded portions are arranged at the ends of the adjusting shaft, the thread directions of the threaded portions at the two ends are opposite, threaded sleeves are mounted on the threaded portions, a movable sleeve is fixedly connected to the end, away from the center of the adjusting shaft, of each threaded sleeve, a connecting block is fixedly mounted at the bottom of the outer side wall of each movable sleeve, and a connecting plate is fixedly mounted at the bottom end of each connecting block. The device has the advantages that the working height can be adjusted, the position of a pressing wheelcan be adjusted, and force application of the pressing wheel to a metal pipe is realized, so that the effect of bending the metal pipe is achieved; and pipe head clamps at the bottom ends of two swing rods can get close to each other, certain extrusion force can be obtained, the bending efficiency of the metal pipe is improved, and the metal pipe can be prevented from being separated from a sleeve.

The invention provides a plate connecting structure. The plate connecting structure is characterized by comprising a column, a connecting rod and at least two plates; positioning grooves are formed in at least two side faces of the column in the length direction; positioning edges are arranged on the two sides of a notch of each positioning groove; one end of the connecting rod abuts against the interiors of the positioning grooves, and therefore the connecting rod and the column can be fixed; the other end of the connecting rod extends out of the positioning grooves, and the other end of the connecting rod and the plates are fixed through connecting auxiliary pieces; and the plates are attached to the column. According to the plate connecting structure, position deviation between the plates due to trepanning position deviation can be avoided, the pass percent of products is increased, and the quality of the products is improved. The invention further provides a plate connecting method capable of achieving position alignment between the plates, easy and convenient to operate and capable of improving the assembly efficiency and lowering the technology difficulty.

The invention belongs to the technical field of a metal roof plate, and particularly relates to a metal roof plate reinforcing device with a monitoring function. The metal roof plate reinforcing device comprises self-sensing reinforcing ribs, transmission lines, an upper computer and reinforcing rib fixing support seats, wherein the self-sensing reinforcing ribs are fixedly connected with the metal roof plate through the reinforcing rib fixing support seats; and the reinforcing rib fixing support seats and the metal roof plate are fixedly connected. The advantages of light dead weight, high strength, small size and high durability are realized. The large-range arrangement can be realized; two characteristics of stress and sensing are realized; and structure materials and function materialsare integrated. Before the roof plate generates defects and damage, the metal roof plate can be reinforced, the wind-uplift-resistant performance of the metal roof plate is improved, and the practical stress condition of the metal roof plate is monitored. When the wind uplift suddenly occurs, flying and scattering of wind uplift falling objects can be inhibited through the integral stress of thereinforcing rib fixing support seats and the self-sensing reinforcing ribs.

The invention relates to the technical field of deflection correction for foundations of buildings or structures, in particular to a deflection correction method applied to deflected square pile groups in coastal and neritic muddy soils. The method includes the following steps: step 1, searching for the skewed pile group, layered grouting on the inclined side of the skewed pile group, and solidifying sea silt; step 2, drilling drainage sand wells on the inclined opposite side of the skewed pile group; step 3, placing The side of the grouting solidification area away from the deflected pile group is excavated layer by layer, and the back plate and hydraulic thrust device are installed close to the solidified sea silt; step 4, calculate the hydraulic thrust value Fx to be applied to the back plate, and use the obtained value Start the hydraulic thrust device to apply force to the back plate; step 5, backfill and solidify after the deflected pile group is restored to its position. The method of the invention can prevent the displacement of the soil layer during deviation correction by solidifying the sea silt on the side of the deviation, and realize fast and safe deviation correction. The force applied to the square pile through the back plate and the solidification area can realize the gradual transition of the pile body and passive pressure relief, and enhance the bearing capacity of the pile group.

A clutch (1), in particular a friction clutch, with a diaphragm spring exerting stress on a pressure plate of the clutch and connected to a disengaging device (4, 9) that acts on its radial inner area and can be activated by way of an electromechanical actuator (5) and is intended to cancel the stress exerted by the diaphragm spring on the pressure plate when the clutch is engaged. The clutch (1) can be achieved by serially integrating a pressure spring (10) into the mechanical transmission path between the electromechanical actuator that activates the disengaging device and the disengaging device itself so that, when the clutch is in an engaged state, a defined basic force is exerted on the disengaging device while vibration decoupling of the electromechanical actuator is realized.

The invention belongs to the technical field of tunnel construction supporting, and particularly discloses a tunnel rack-free arch frame and an installation method thereof. The tunnel rack-free arch frame comprises a plurality of sets of bent arch-shaped body parts and a plurality of sets of arch frame inclined struts, wherein each set of bent arch-shaped body part comprises an upper step arch frame and a lower step arch frame; the upper step arch frame comprises a top arch frame N1 positioned at the top of the middle, middle arch frames N2 and N3 positioned on the two sides of the top arch frame, and base arch frames N4 and N5 positioned at the bottoms of the two sides of the middle arch frames; the lower step arch frame comprises supporting arch frames N6 and N7 positioned at the bottomsof the base arch frames; the two sides of each set of arch-shaped body part are symmetrically provided with two arch frame inclined struts; and the arch frame inclined struts are arranged on the twosides of the base arch frames correspondingly. The tunnel rack-free arch frame has the advantages of being simple in structure and rapid in construction.

The invention discloses a horse-riding-type bicycle which comprises a horse-riding frame. The horse-riding frame comprises a seat bracket, a grip handle bracket and a connecting frame. Pedals are arranged at the lower end of the grip handle bracket. The seat bracket is hinged to one end of the connecting frame. The grip handle bracket is hinged to the other end of the connecting frame. A connecting rod is connected between the grip handle bracket and the seat bracket. A front wheel mounting frame and an auxiliary bracket are further arranged on the connecting frame in an extending mode. The front wheel mounting frame is provided with front wheels. The front wheels are provided with steering mechanisms. The horse-riding-type bicycle further comprises a travelling frame and a transmission mechanism. The travelling frame is connected with the connecting frame. The travelling frame is provided with a rotating shaft. The transmission mechanism comprises two sprockets, a transmission belt and a guide wheel set. The guide wheel set comprises a plurality of guide wheels. The two sprockets are arranged at the two ends of the rotating shaft through two unidirectional flywheels correspondingly. The two unidirectional flywheels are arranged oppositely. The two sprockets are in transmission connection through the transmission belt. The two ends of the transmission belt are connected to thetwo pedals correspondingly and sequentially penetrate through all the guide wheels.

The invention provides a prefabricated cavity floor slab with ribbed beams, which includes beams, cavity plate components, ribbed beams, upper flange plates and joints; the feature is that the beams are prefabricated reinforced concrete beams or cast-in-place Reinforced concrete or shaped steel beams; the cavity plate member is composed of a single-leg hoop reinforced concrete rib beam, a double-leg hoop reinforced concrete rib beam, and a steel mesh body; the ribbed beam is combined with a single-leg hoop reinforced concrete rib beam A ribbed beam is formed; the upper flange plate and the ribbed beam are integrally cast in-situ concrete; the joint joint is on the lower surface of the prefabricated cavity floor; the joint joint does not penetrate the floor plate.

The invention belongs to a low-voltage power distribution device, and particularly discloses an overhead circuit cross arm. A force bearing rod is made of glass fiber reinforced plastic profiles. The force bearing rod and 2-6 stringing grooves on the force bearing rod form an integrated 2-6-wire insulator. The four-six-wire tension resisting cross arm used as a tension resisting rod is of an adjustable triangular truss structure. The low-voltage glass fiber reinforced plastic overhead circuit cross arm has a series of advantages of resisting corrosion, being low in weight, high in mechanical strength, long in service life, easy to transport and install and good in force bearing and insulation performance and the like.

The invention relates to an invisible vertical maxillary tooth orthodontic device and a use method thereof. The invisible vertical maxillary tooth orthodontic device comprises a transparent orthodontic appliance and further comprises a pair of oral external force pulling pieces matched with the transparent orthodontic appliance; the oral external force pulling pieces are detachably connected with the transparent orthodontic appliance; and the oral external force pulling pieces apply vertically upward acting force to the transparent orthodontic appliance. Compared with the prior art, a connecting accessory is arranged on the transparent orthodontic appliance, and upward vertical pulling force is applied to the transparent orthodontic appliance by utilizing the oral external force pulling pieces convenient to disassemble, so that the transparent orthodontic appliance generates vertical orthodontic force on the dentition of the maxillary tooth, the maxillary tooth can be vertically corrected, and the orthodontic period is greatly shortened.