14results about How to "Guarantee stress stability" patented technology

The invention provides an abnormal sound test bed for a steering pull rod. The abnormal sound test bed comprises a base, a positioning table and an excitation mechanism, the positioning table and the shock excitation mechanism are fixedly connected with the upper side of the base, and the shock excitation mechanism is arranged on the x-direction side edge of the base; the vibration excitation mechanism comprises a fixing frame, a vibration frame, a driving assembly and a plurality of elastic connecting pieces, the driving assembly comprises a transmission end capable of vibrating in the x direction, the transmission end is fixedly connected with the vibration frame, and each elastic connecting piece comprises an elastic piece, a first connecting part and a second connecting part. The first connecting part and the second connecting part are connected with the fixing frame and the vibrating frame respectively and enable the elastic piece to be arranged perpendicular to the x direction, the vibrating frame is provided with an installation base face arranged perpendicular to the x direction, and a butt joint is fixedly connected to the installation base face. According to the invention, the elastic connecting piece is arranged to limit the vibration frame, so that the vibration frame can only vibrate in the x direction, and the accuracy of abnormal sound test is ensured.

The invention discloses a mass concrete composite anti-crack structure and a crack control construction method based on the mass concrete composite anti-crack structure. The composite anti-crack structure comprises a core common concrete layer, an outer side anti-crack concrete layer, a reinforcing mesh arranged between the core common concrete layer and the outer side anti-crack concrete layer, and a top anti-crack concrete layer. The method comprises the steps that firstly, the thickness of side face anti-crack concrete and the thickness of top face anti-crack concrete needing to be poured are calculated according to cracking risk assessment, the side face anti-crack concrete is poured firstly, then core common concrete is poured, and it is ensured that the pouring height of the side face concrete is always 20-30 cm higher than the core common concrete; and then the top surface is completely constructed by adopting anti-crack concrete. The reinforcing mesh subjected to special treatment is adopted, so that the overall stress of the composite structure is uniform, the overall anti-cracking performance and durability of the composite structure are improved through the outer side anti-cracking concrete, the construction technology is simple, meanwhile, a large amount of construction cost and operation and maintenance cost can be saved, and the composite structure is suitable for application and popularization.

The invention discloses a steel pipe forging device with a positioning mechanism, which relates to the technical field of steel pipe forging and comprises a mounting frame, a core anvil, the positioning mechanism and a pneumatic hammer. And a component force forging mechanism for changing the forging direction of the pneumatic hammer is arranged on the mounting frame. The component force forging mechanism is arranged, kinetic energy provided by the pneumatic hammer is dispersed to the forging hammer, in the kinetic energy transmission process, under the condition that kinetic energy loss is reduced to the maximum degree, forging work is achieved, the kinetic energy loss is reduced, and the forging strength and precision are guaranteed; through cooperation with the first linkage mechanism, downward force applied by the pneumatic hammer is converted into rotating force, the mounting ring is pushed to generate large torque, then large force can be provided for pushing the forging hammer to move, and the forging effect is guaranteed; and by arranging the buffering mechanism, the reverse acting force borne by the rotating rod and the second connecting rod is buffered, and the situation that the rotating rod and the second connecting rod are deformed due to stress, and the next forging work is affected is prevented.

The utility model discloses a demoulding device for a turbine blade. The demoulding device comprises a base and a mould assembly, a group of ejector pins penetrate through the base; the mold assembly comprises a movable mold and a fixed mold, and an inclined driving block is arranged on the movable mold; a mold core is arranged in the middle of the fixed mold, and a mold core groove is formed in the outer edge of the mold core; an ejector groove matched with the ejector pin is formed in the bottom surface of the mold core; in a mold closing state, the inclined driving block is positioned in the mold core groove; the ejector pin and the ejector groove are staggered, and the upper surface of the ejector pin is located below the ejector groove; in a mold opening state, the inclined driving block is separated from the mold core groove; the ejector pins correspond to the ejector grooves in a pair and are located in the ejector grooves, and the injection-molded turbine blade is ejected out to complete demolding. In the mold opening process, the inclined driving block drives the mold core to rotate in the arrangement direction matched with the turbine blade, demolding of the turbine blade is achieved through rotating motion parallel to the parting surface and linear motion perpendicular to the parting surface, it is guaranteed that the bad situation that the edge of the turbine blade deforms and bends in the demolding process is avoided, and the quality of a demolding product is improved.

The present invention relates to a lifting device and a lifting method for slender and flexible equipment, comprising a crossbeam, a first lifting ring symmetrically fixed on both ends of the crossbeam, and a second lifting ring symmetrically fixed below the crossbeam, a hook is provided above the crossbeam, a first rope is connected between the hook and the first lifting ring; a pulley is fixedly suspended on the second lifting ring, a second rope is embedded in the wheel groove of the pulley, rope buckles are provided at both ends of the rope buckle, and the rope buckles are fastened to the lifting ears of the equipment; the present invention adopts multi-hanging point lifting to avoid damage to the equipment due to excessive disturbance; the main hoist adopts self-balancing device multi-hanging point lifting, taking into account the stress conditions of the equipment during the lifting and uprighting process, ensuring the lifting safety and economic practicality.

This invention relates to the field of membrane laying technology, and more particularly to a geomembrane laying device. It includes a frame with two sets of rollers symmetrically arranged on it. These rollers work together to support the geomembrane roll. A base plate is detachably mounted at both ends of the geomembrane roll on the frame. A primary spring is mounted on the base plate, with a truss plate above it. A secondary spring is mounted on the truss plate, and a support is mounted above the secondary spring. A horizontal insert is detachably mounted on the support, with a rod inserted into the insert. A top spring is positioned between the rod and the insert. This multi-stage buffer structure, combining primary and secondary springs, along with the top spring, achieves graded dispersion of elastic tension, significantly reducing the geomembrane pinching and tensile damage problems caused by the concentrated tension of traditional single-segment springs, thus ensuring the geomembrane's impermeability and service life.

The invention provides precision measurement equipment for the inner diameter and the outer diameter of a gear ring, which belongs to the technical field of measurement and comprises a workbench, a positioning mechanism, an outer diameter detection mechanism and an inner diameter detection mechanism. According to the precise measurement equipment for the inner diameter and the outer diameter of the gear ring, the inner diameter detection mechanism and the outer diameter detection mechanism share the same positioning mechanism and the gear ring in the same rotating state, measurement of the inner diameter and the outer diameter of the gear ring can be synchronously completed through one-time clamping and the same reference, tools do not need to be replaced, secondary clamping is not needed, the detection process is greatly simplified, and the detection efficiency is improved. Compared with the prior art, equipment investment cost and manual operation cost are reduced, the problem of additional measurement errors caused by separate clamping and inconsistent positioning references in the prior art is solved, the relevance and accuracy of internal and external diameter measurement data are remarkably improved, and the overall size precision of the gear ring can be reflected more truly and comprehensively.

The invention belongs to the technical field of ring buckle type supporting scaffolds, and particularly relates to a ring buckle type supporting scaffold, a design method and a construction method. The ring-lock type supporting scaffold is used for supporting a beam plate, the outline of the bottom face of the beam plate is circular, the beam plate comprises a plate and a plurality of radial beams, at least the radial beams are distributed in the radial direction of the circle, the ring-lock type supporting scaffold comprises a plurality of module units, and the module units are arranged on the plate. Each module unit can respectively support one radial beam, the vertical rods of each module unit are correspondingly arranged along the span direction of the radial beams, an area with unmatched modulus exists between two adjacent module units, and the areas with unmatched modulus are connected through connecting pieces. By means of the structure, the stress stability of the middle beam of the building structure can be guaranteed, the universality and interchangeability of components can be improved, scaffold materials are produced in a standardized mode, and the production cost is reduced. And a plurality of module units can be synchronously arranged and erected, so that the construction progress is accelerated.

The invention discloses a tray separating machine, which relates to the field of tray separating equipment and comprises a frame, wherein a pushing mechanism, a tooth separation mechanism, a suction support mechanism and a box tray conveying device are arranged on the frame, the pushing mechanism comprises an upper supporting platform arranged on the frame, a slide groove is provided on the upper edge of the upper supporting platform in a pushing direction, a pushing bracket is movably arranged in the slide groove, a pushing plate is provided on the upper part of the pushing bracket extending out of the slide groove, a guide rail is provided on the bottom of the upper supporting platform along the pushing direction, a traction mechanism for pulling the pushing bracket to move along the slide groove toward the tooth separation mechanism is arranged on the frame; the tooth separation mechanism is arranged at the end of the upper supporting platform, the suction support mechanism is arranged on the frame at a position corresponding to the tooth separation mechanism, the box tray conveying device is arranged on the frame at a position directly below the suction support mechanism, an arc-shaped guide support plate is arranged between the upper supporting platform and the box tray conveying device on the frame, and the lower end of the arc-shaped guide support plate is connected to the box tray conveying device, and the machine has the advantages of good suction support effect, stable suction support, stable pushing force and no need for an additional power source.

The present invention provides an anatomical shoulder joint prosthesis, belonging to the technical field of medical devices. It comprises an implant plug, the outer side of the implant plug is provided with four groups of fixing fins at equal angles, the inner side of the implant plug is nested with a fixing pin, the bottom of the fixing pin is connected to a contact block 1, and also comprises a support assembly, the support assembly is installed on the inner side of the four groups of fixing fins, and the support assembly is used to assist in fixing the inner side of the humerus. The present invention is provided with a support assembly, and four groups of support rods are spread out to assist in supporting the radial direction of the positioning pin on the inner side of the humerus, so that the two groups of force directions on the inner side of the humerus are perpendicular to each other, and can conflict with each other through the force directions, so as to prevent the positioning pin from retracting and loosening during the movement of the prosthesis, causing the implant plug to fall off from the clamping hole slot, affecting the patient's postoperative movement recovery, and reducing the cost of surgery.

The invention discloses a new energy power battery heating wire resistance testing device and a heating wire thereof, and relates to the technical field of resistance detection, and the new energy power battery heating wire resistance testing device comprises a bottom plate, a resistance detection device, a transmission device, a shaping device and a heating wire; according to the invention, the push plate pushes the turning block to drive the transmission plate to rotate, and the guide effect of the slope surface structure of the transmission groove is utilized to drive the shaping rod to move radially, so that the heating wire can be shaped, and the stress uniformity and the current conduction stability of the heating wire during detection are effectively ensured; the technical problem of large detection data deviation caused by irregular shape of the heating wire in traditional detection is solved, and the accuracy and the reliability of a resistance detection result are greatly improved.

The present application discloses a kind of railway prefabricated box girder prestressed steel strand whole hole threading process, belong to steel strand threading field.The process includes the following steps: step one, threading preparation: the pay-off reel and threading machine are moved to the end of beam body predetermined position, clean the reserved hole of beam body, finished product bundle is hoisted into pay-off reel and end bundling is removed;Step two, finished product bundle traction: the front end of finished product bundle is pulled into the clamping pushing mechanism of threading machine, and the clamping pushing mechanism is started to pull finished product bundle close to the reserved hole;Step three, install guide wheel: install guide wheel at the front end of finished product bundle, and the end of finished product bundle is fixed by detachable connecting structure between guide wheel and finished product bundle.The present application is precast by finished product bundle factory fixed size, whole bundle mechanical pushing and two end mark plate corresponding check, so that each steel strand is parallel straight and not winding, the stress is consistent when tensioning, while reducing manual operation, improve construction efficiency and quality.

The utility model relates to an assembly type municipal comprehensive rod foundation which comprises a comprehensive rod foundation basic body module, a standard block module and a connecting piece, and the standard block module is fixedly connected to the side face of the comprehensive rod foundation basic body module through the connecting piece. The comprehensive rod foundation basic body module comprises a comprehensive rod foundation basic body, the top of the comprehensive rod foundation basic body is fixedly connected with a flange steel bar and a flange chassis, an electric power pipe and a connecting hole penetrate through the interior of the comprehensive rod foundation basic body, and wedge-shaped shear keys are arranged on the periphery of the comprehensive rod foundation basic body; the standard block module comprises a standard block body, wedge-shaped shear keys and wedge-shaped shear key holes are formed in the side faces of the periphery of the standard block body respectively, the wedge-shaped shear keys are matched with the wedge-shaped shear key holes, and connecting holes are formed in the standard block body in a penetrating mode. The connecting piece comprises a twisted steel bar and a nut, and the twisted steel bar penetrates through the connecting holes in the comprehensive rod foundation body and the standard block body.

The utility model discloses a lower control arm of a double-fork-arm front suspension, which comprises a control arm body, the control arm body is of a cavity structure formed by buckling and welding an upper plate and a lower plate, and a first extension end, a second extension end and a third extension end of the control arm body are respectively used for connecting a front bushing, a rear bushing and a ball pin assembly; the damping support assembly comprises a damping inner plate, a damping outer plate and a mounting nut, the damping inner plate is embedded in the cavity structure and welded to the inner wall of the upper plate and the inner wall of the lower plate, the damping outer plate is arranged on the outer side of the upper plate and welded to the upper plate, and the mounting nut is fixed to the side, back to the damping outer plate, of the damping inner plate; through holes are formed in the areas, right opposite to the damping inner plate, of the upper plate and the lower plate, a damper mounting channel is formed between the damping inner plate and the damping outer plate, and mounting through holes used for bolt connection are formed in the damping inner plate and the damping outer plate in a right opposite mode. The mounting function integration of the shock absorber can be realized, and the requirements of light weight and structural reinforcement are met.