16results about How to "Reduce bending moment" patented technology

The utility model discloses an upper cross beam structure of a closed four-point high-speed precision press, which comprises an upper cross beam, the upper cross beam is of a symmetrical structure, two ends of the upper cross beam are respectively provided with a mounting hole, each mounting hole is respectively provided with a first sliding bearing seat, and at least one mounting hole is provided with a flywheel seat; a first installation seat is arranged in the middle of the upper cross beam, a second installation seat is detachably arranged on the first installation seat, lower bearing seats are arranged at the two ends of the first installation seat respectively, upper bearing seats are arranged at the two ends of the second installation seat respectively, and each upper bearing seat and the corresponding lower bearing seat form a second sliding bearing seat. According to the technical scheme, the upper cross beam is of a unique split type structure, and the first installation base and the second installation base are connected through the attached installation planes and the bolts. On one hand, machining is facilitated, and the overall machining difficulty is reduced; and on the other hand, when the precision deviation of the hole system is detected, fine adjustment can be carried out by repairing the mounting plane.

The invention discloses a constant-pressure overflow device for pile sinking of a bamboo joint pile and a pile sinking method of the bamboo joint pile, the constant-pressure overflow device comprises a water bag assembly and a constant-pressure overflow valve, the water bag assembly comprises a soil bag and a framework pipe, and water is injected into the soil bag for providing support pressure for a pre-drilled hole; a counter weight lever type assembly of the constant-pressure overflow valve comprises a lever arm connected to a fulcrum shaft pin, the inner side of the lever arm is connected with a valve rod, the bottom end of the valve rod is connected with a blade valve element, when the constant-pressure overflow valve does not work, the blade valve element seals a water inlet, and when the constant-pressure overflow valve works, water flow in the water inlet can eject the blade valve element to flow out through a water outlet. A second balancing weight is arranged on the outer side of the lever arm, and the second balancing weight can hinder water flow in the water inlet through the lever effect. The supporting pressure in the water bag assembly can be ensured to be constant, and the problems that the geotechnical bag is burst and the pre-drilled hole collapses are avoided; due to the design of a large-diameter pipeline, pipeline blockage is avoided; and through cement-based grout replacement, the water bag assembly is converted into a geotextile bag concrete pile, and the foundation is permanently reinforced.

The utility model discloses a kind of wall cleaning devices suitable for coal powder bin, it is related to coal powder bin cleaning technical field.The utility model includes first support frame, the inside of first support frame is provided with adjusting assembly, adjusting assembly includes first fixed cylinder being installed on first support frame, first motor being installed on the inner wall top of first fixed cylinder, first gear being rotated and cooperated in the inside of first support frame, first sliding block being slidably cooperated in the opposite two sides of the inside of first support frame.The utility model is cooperated by first motor and first gear, and is engaged with first toothed plate, to ensure that the moving distance of two sides first sliding block is consistent, avoid structural deviation or jamming due to uneven stress, first sliding block and first support frame, avoid the shaking range of sliding block, ensure the straightness and stability in moving process, cleaning assembly is convenient for scraping and cleaning to the inner wall of coal powder bin.

This invention provides a method for fabricating a flexible heat transfer device with a channel-hemispherical composite topology structure. The method includes the following steps: Step 1: Designing a channel topology and a hemispherical topology arranged at intervals as the topological structure, with multiple hemispherical topologies between adjacent channel topologies; Step 2: Optimizing the design profile curve, design height, design period T1 of the channel topology, the design radius of the hemispherical topology, the design spacing T2 between multiple hemispherical topologies between adjacent channel topologies, and the design spacing T3 between two adjacent rows of hemispherical topologies based on fluid flow resistance, maximum bending stress, effective cross-sectional area, and maximum structural support force, and selecting the optimized channel topology and hemispherical topology; Step 3: Fabricating a flexible heat transfer device with the optimized channel topology and hemispherical topology from Step 2. The flexible heat transfer device fabricated using the topology optimization design of this invention can maintain high-efficiency heat transfer performance even after multiple bends.

The invention discloses a transmission structure and method of an oil injection pump and an electronic unit pump system, belongs to the technical field of engines, and solves the problems that a rotating shaft of an oil injection part is too large in torsional force and easy to damage. A transmission shaft sleeve used for being connected with an engine body is arranged at the end, close to a fuel injection pump cam shaft, of the fuel injection pump, a transmission shaft is rotationally arranged in the transmission shaft sleeve, an inner spline is arranged at one end of the transmission shaft, and a transmission outer spline sleeve is arranged on the inner spline. The transmission outer spline sleeve is sleeved on a fuel injection pump cam shaft of the fuel injection pump, a gear is arranged at the other end of the transmission shaft, a plurality of mounting grooves are arranged on the fuel injection pump on the outer side of the fuel injection pump cam shaft, and supporting bushes used for supporting the fuel injection pump cam shaft are arranged in the mounting grooves. According to the transmission structure and method of the fuel injection pump and the electronic unit pump system, the structure is compact, arrangement is convenient, camshaft faults are reduced, and the stability of the fuel injection pump is improved.

The application relates to an oscillating pulse screw drill tool with improved shaft stress, which comprises a drill tool body, a static valve assembly and a dynamic valve assembly. The drill tool body comprises a shell and a shaft, the shell is a hollow tubular structure, and the shaft is located in the shell and can rotate in the shell. The static valve assembly comprises a static valve shell coaxially connected with the shell, and a static valve flow channel is arranged in the static valve shell. The dynamic valve assembly is axially gap-connected with the static valve assembly, and comprises a dynamic valve seat fixed on the top of the shaft, and a dynamic valve flow channel is arranged in the dynamic valve seat. The dynamic valve assembly rotates eccentrically relative to the static valve assembly to periodically change the flow area between the static valve flow channel and the dynamic valve flow channel. The dynamic valve assembly of the application is gap-connected with the static valve assembly, the static valve assembly directly transmits the axial force borne by the static valve assembly to the static valve shell, and does not directly transmit the axial force to the dynamic valve assembly. Therefore, the shaft can bear additional axial force, rotating friction resistance and bending moment, the service life of the shaft and the bearing system of the screw drill tool is prolonged, and the efficiency of the whole screw drill tool is improved.

A humanoid robot arm gripper structure includes a mounting base, a power unit, a lifting device, and two gripping mechanisms symmetrically mounted on the mounting base. The mounting base has an inner cavity, and the lifting device is mounted within this cavity. The power unit is connected to the lifting device for driving its lifting motion. The gripping structure includes a first rod, a second rod, and a third rod. One end of the first rod has a first hinge and a second hinge. The first hinge is hinged to the lifting device, and the second hinge is hinged to the mounting base. The second hinge of the first rod is also connected to the mounting base, reducing the reaction force transmitted to the first hinge and thus ensuring the stability of the lifting device. Excessive pressure will prevent the lifting device from shaking, thus maintaining its stability.

The utility model discloses a movable counterweight self-adaptive device of a boom crane, which belongs to the technical field of boom cranes and comprises an upper rotary table, a main boom, a movable pulley block, a fixed pulley block, a steering fixed pulley block, a steel wire rope, a movable counterweight block and an inclined slide way, the movable pulley block is fixed on the main arm; the fixed pulley block is fixed on the upper turntable; a steel wire rope is connected in series with the movable pulley block and the fixed pulley block, and one vector head is led out from the fixed pulley block, connected to the steering fixed pulley block at the tail end of the upper turntable and then forwards connected to the movable balancing weight; and the movable balancing weight is arranged on the inclined slide way. When the main arm of the crane is lifted in a rotating manner, the distance between the movable pulley block and the fixed pulley block is reduced, and the movable balancing weight moves towards the direction close to the rotation center under the action of gravity, so that the balancing weight torque is reduced; on the contrary, when the main arm rotates and lies on the arm, the balancing weight moves backwards to increase the moment of the balancing weight, and the balancing weight automatically adapts to the change of the load moment, so that the overturning moment of the crane is favorably reduced, and the crane is more economical and safer.

The application relates to the technical field of deformation joints, and provides a roof deformation joint connecting structure applied to a deformation joint on a roof, which comprises step steps, outer cover plates and inner support assemblies; two step steps are arranged on the two sides of the roof respectively, each step step is provided with a mounting seat at the top, and the mounting seat is arranged along the length direction of the step step; the outer cover plate is in an arc shape, the outer cover plate is arranged above the roof to cover the deformation joint, and two mounting seats are sealingly connected to the two sides of the outer cover plate in the width direction; the inner support assembly is arranged on the inner side of the outer cover plate, the upper part of the inner support assembly is attached to the inner surface of the outer cover plate and plays a role of supporting and strengthening the outer cover plate. The roof deformation joint connecting structure has the advantages of stronger strength, higher bearing capacity and better waterproof effect.

The utility model relates to the technical field of knitting, and discloses a knitted belt knitting device which comprises a knitting machine body and a belt winding device composed of a supporting seat, a winding motor, a hydraulic push rod and an adjustable winding disc, a discharging conveying belt is arranged on the side wall of the knitting machine body, the belt winding device is arranged at the shaft end of the discharging conveying belt, and the belt winding device is arranged on the supporting seat. A main body of the belt winding device is a supporting seat, the side wall of the supporting seat is connected with the shaft end of the discharging conveying belt in a matched mode through an adaptive bolt, a winding motor and a hydraulic push rod are arranged on the two opposite side edges of the belt winding device correspondingly, and the winding motor is fixedly connected with the outer side wall of the supporting seat through an adaptive bolt. The hydraulic push rod is fixedly connected with the outer side wall of the supporting seat through an adaptive bolt, the winding motor is correspondingly arranged on one side of the discharging conveying belt, the belt winding device is arranged at the discharging port end of the knitting belt knitting device, and the winding quality of finished knitting belts is greatly improved through the flexible and adjustable structure of the knitting belt knitting device.

The utility model relates to a mast technical field especially relates to a kind of reinforcing mast mechanism.Its technical scheme includes fixed base and rigging, and the rigging includes support plate, the side portion of support plate is rotatably connected with the winding roller with anti-drop plate, fixedly installed with pull cord on the winding roller, the outer wall of mast body and located the upper positioning sleeve of lower positioning sleeve is equipped with upper positioning sleeve, and the end of pull cord is fixedly connected with upper positioning sleeve;Support plate is fixedly installed at the top of fixed base.The utility model is by winding roller using pull cord to exert tension on upper positioning sleeve from four directions, to support the position of fixed mast body, additional upper positioning sleeve makes it be located at two-thirds height of mast body, originally concentrated in the load of mast body near bottom is dispersed to upper positioning sleeve, lower positioning sleeve and upper positioning sleeve share stress, greatly reduce bending moment, shear, avoid local excessive stress, lead to mast body bending.

The utility model provides a kind of multilayer shuttle vehicle walking driving mechanism, including drive motor assembly, transmission walking component, outer fork plate component, bearing seat, guide wheel, transmission belt;The outer fork plate component is at least installed with bearing seat at first side both ends respectively;The transmission walking component is installed in the first side of outer fork plate component by at least the bearing seat being arranged at the first side both ends of outer fork plate component;The drive motor assembly is installed in the first side of outer fork plate component and is connected transmission walking component by transmission belt;Guiding wheel is installed in one end of outer fork plate component.The utility model whole structure is simple, and it occupies small, can substantially reduce the weight of walking driving mechanism.

The application discloses a robot control method and device, a robot, a storage medium and a computer program product. The method comprises the following steps: pre-planning a motion trajectory of a robot end tool according to a robot operation parameter, determining an expected bending moment to be borne by the tool; when the expected bending moment is greater than a preset threshold, determining a robot operation rate, controlling the speed and acceleration of the tool according to the operation rate, so that the bending moment borne by the tool does not exceed the preset threshold. According to the scheme, the bending moment borne by the end tool is calculated in advance in the motion planning process of the robot, and the operation rate is adjusted in the actual motion process, so that the bending moment borne by the end tool in the motion process is less than the bearing limit, the tool is prevented from being bent or even broken, the robot is ensured to stably operate, and the operation safety is improved.

The application belongs to the technical field of pipeline connection, and particularly provides a pipeline system with anti-loose bolts and a method, which comprises multiple pipelines, anti-loose bolts, a monitoring device and a controller; the multiple pipelines are sequentially butted end to end through flanges, and the flanges have multiple screw holes along the circumferential direction of the pipelines; the anti-loose bolts are uniformly distributed along the circumferential direction of the pipelines, and are used for penetrating through the screw holes in the adjacent flanges to fix the adjacent pipelines; the anti-loose bolts have through holes penetrating through the anti-loose bolts, and the through holes are parallel to the axial direction of the anti-loose bolts and are offset relative to the axial direction of the anti-loose bolts; the fiber grating sensors are fixed in the through holes; the monitoring device is signal connected with the fiber grating sensors to monitor the strain of the fiber grating sensors; one side of the pipeline along the circumferential direction is a to-be-damaged area, and the anti-loose bolts in the to-be-damaged area are provided with rotary power members, and the rotary power members can drive the anti-loose bolts connected therewith to rotate; the through holes of the anti-loose bolts outside the to-be-damaged area are located on the side close to the center of the pipeline.

The invention discloses a design method for controlling force flow of a building structure based on staged hinging. The design method comprises the steps that firstly, an overall simulation model of the building structure is constructed, the ends of all components are set to be in rigid connection, the self weight and additional dead load of the structure are input, and the stress conditions of all the components are analyzed; secondly, calculating the bending moment of each component under different influence factors, analyzing the big bending moment cause of the end part of each component, and determining the end part of the component needing to be adjusted and connected; after the initial simulation model is restored, the ends of the components needing to be adjusted and connected are arranged to be hinged, the self weight of the structure and the additional dead load are applied again, and the bending moment of each component is calculated; and finally, under the condition of keeping the internal force state of the component when the dead load is applied, defining the end part of the hinged component as rigid connection, applying different influence factors, calculating the internal force of the component, and checking the strength and the stability of the component. By means of the design method, the bending moment borne by the specific component is reduced, the structure redundancy is not reduced, and the anti-seismic performance of the structure is not changed.