63results about How to "Guaranteed rigid connection" patented technology

The invention discloses a tailor welding forming positioning device used for a large-sized thin-wall cylinder type shell section. The tailor welding forming positioning device used for the large-sizedthin-wall cylinder type shell section comprises a base, an inner supporting assembly, a longitudinal pressing assembly and an annular pressing assembly; the base is a flange plate which is horizontally arranged; the flange plate comprises an upper annular disk and a lower annular disk; the external diameter of the lower annular disk is larger than the external diameter of the upper annular disk.According to the device, a fixed diameter cylinder mould base is formed by the inner supporting assembly, main longitudinal supporting for external pressing of shell body products during welding is formed by the longitudinal pressing assembly and main annular supporting for the external pressing of the products during welding is formed by the annular pressing assembly; the annular pressing assembly is fixed on the longitudinal pressing assembly, so that the mounting and dismounting are convenient; the device is capable of improving the conformity and stability of the accuracies, such as diameter, circular degree and the like of the large-sized thin-wall cylinder type shell section products during welding machining and improving the qualified rate of the products greatly.

The invention relates to the technical field of steel structures, in particular to an adjustable building stand column connecting mechanism and a using method. The adjustable building stand column connecting mechanism comprises a first column body and a second column body, and further comprises a controller, a first adjusting device, a second adjusting device and a top connecting device; and the first adjusting device is arranged at the bottom of the first column body and used for accurately adjusting the installation position of the first column body, the first adjusting device comprises a bottom shell, the second adjusting device comprises a top cover, a bottom cover, four flexible connecting assemblies and four rigid connecting assemblies, the top connecting device comprises a lining and a connecting assembly, the lining is arranged on the outer wall of the top of the second column body, the connecting assemblies are arranged on the top of the lining, and the rigid connecting assemblies are electrically connected with the controller. According to the adjustable building stand column connecting mechanism and the using method, the mounting position of stand columns can be accurately adjusted, and time and labor are relatively saved during adjustment; and meanwhile, according to the stress condition of the stand columns, an internal connecting mechanism can be automatically adjusted to prevent collapse.

The invention relates to a wheel-legged mechanism of a motor vehicle, the wheel-legged motor vehicle and a wheel-legged motor vehicle set, and belongs to the field of motor vehicles; the wheel-legged mechanism comprises thighs, thigh driving units, shanks, shank driving assemblies and wheels; each thigh is connected with a hollow shaft, the hollow shafts are rotatably connected to a vehicle frame, and a containing cavity is formed in each thigh; the thigh driving units are connected with the hollow shafts and drive the hollow shafts to drive the thighs to swing; the shanks are hinged to the thighs; each shank driving assembly comprises a transmission unit arranged in the corresponding containing cavity and a shank driving unit arranged on the vehicle frame, the transmission units drives the shanks to rotate, and the shank driving units are in transmission connection with the transmission units through rotating shafts; the wheels are rotationally arranged at one ends of the shanks; the posture of the wheel-legged type mechanism is adjusted through rigid mechanical transmission, the wheel-legged type mechanism can be used under multiple working conditions, the design structure is simple, control is easy, the problem that control lags behind due to the fact that a sensing technology and a control system are adopted traditionally is solved, and the control accuracy is improved.

The invention relates to a 3D printer forming platform adjusting device and a lower projection light curing 3D printer. The forming platform adjusting device comprises a forming seat tray, a forming seat, a tension part and fastening parts, wherein the forming seat tray is provided with at least three first threaded through holes, the central lines of the first threaded through holes are not in the same plane, and the upper surface of the forming seat tray is connected to a forming platform cantilever in a pressed mode; the upper surface of the forming seat is opposite to the lower surface ofthe forming seat tray, and the lower surface of the forming seat is used for allowing a to-be-printed target body to be attached; the tension part is of a rod-shaped structure, and one end of the tension part penetrates through the forming seat tray to be fixedly connected with the forming seat and to enable swinging is achieved around the contact part between the tension part and the forming seattray; and the number of the fastening parts is the same as to the number of the first threaded through holes, one end of each fastening part cooperates with one corresponding first threaded through hole, and the other end of each fastening part can abut against the upper surface of the forming seat. According to the 3D printer forming platform adjusting device and the lower projection light curing 3D printer, a platform ensures that the bottom surface of the forming platform is completely attached to the bottom surface of a liquid material box, and the bottom surface of the forming platform can be ensured to be parallel to the bottom surface of the liquid material box in each layer of printing, so that the consistency of the height of printed parts is ensured, and the height error size iseffectively reduced.

The invention provides a vibration testing method for the ignition device of an aviation engine, and provides standard steps for the operation of vibration testing process for ignition device of aviation engine. The method solves the accuracy of a product vibration test and the consistency of the vibration test result of batch products. The method solves the problems of material selection, shape design, fixture roughness requirement, determination of the installation position of the ignition device on a fixture, and fastening manner of an ignition device on the fixture during the design of thefixture. The rigid connection between the ignition device and a vibration testing bench is ensured through the reasonable design of the vibration fixture. A sensor is used for monitoring during the vibration test, and the selection of the sensor sensitivity, the sensor installation angle, the selection of the sensor control point, the fixing of the sensor, the wiring of the sensor and so on are used to explained, which ensures the reliability of the signal testing results during the vibration test.

The invention discloses a shaft tunneling machine and a cutter head thereof. The cutter head comprises a middle cutter head body and a plurality of folding spoke arms foldably arranged on the middle cutter head body and used for mounting cutters; any folding spoke arm is connected with a connecting assembly detachably connected to the middle cutter head body; a plurality of bases arranged in one-to-one correspondence with the folding spoke arms are fixedly connected to the middle cutter head body, and any base is hinged to the corresponding folding spoke arm; and any folding spoke arm is provided with a supporting boss, and each base is provided with a concave positioning block combined with the corresponding supporting boss in an embedding mode for positioning the corresponding folding spoke arm. The cutter head is connected with the middle cutter head body through the connecting assemblies, the embedded connection of the concave positioning blocks and the supporting bosses ensures the rigid connection of the whole cutter head, and accordingly the stability of tunneling can be further ensured. Meanwhile, when a shaft is supported or the inner diameter is reduced after pipe segments are assembled, the cutter head can be smoothly recovered, the dismantling construction period can be shortened, the working efficiency can be improved, and the economical efficiency and the personnel safety can be improved.

The invention discloses a wind power generation tower foundation with prefabricated foundation prestressed beams and slab. The wind power generation tower foundation with prefabricated foundation prestressed beams and slab comprises a concrete cushion on which a concrete foundation slab is arranged; a circular-arc-shaped concrete column pier is arranged in the middle of the concrete foundation slab; edge small beams are arranged on parts, close to edges, of the concrete foundation slab, and the circular-arc-shaped concrete column pier and the edge small beams, and two adjacent edge small beams are connected by means of prefabricated cantilever beams; prestressed anchor bolts are uniformly buried in the concrete column pier, and one end of each prestressed anchor bolt is connected with a lower foundation anchor plate, while the other end of the same is connected with a tower tube; voids are uniformly formed in the prefabricated cantilever beam, and the prefabricated cantilever beams are in prestressed connection with the concrete foundation slab by using prestressed bolts in the voids. Rigid connection of the tower tube with the foundation is guaranteed, the amount of the steel utilized is reduced, and the construction of such a part is also simplified simultaneously.

The invention relates to the technical field of material conveying, and particularly provides a calcium carbide transport line and calcium carbide trolleys. The calcium carbide transport line comprises the calcium carbide trolleys and a conveying track; the conveying track comprises two guiding rails arranged side by side; the conveying track is a closed-loop track; rollover preventing structuresused for preventing the calcium carbide trolleys from rolling over towards the two sides of the extending direction of the conveying track are arranged between the calcium carbide trolleys and the conveying track; and all the calcium carbide trolleys are sequentially hinged head to end so as to form a closed loop, each calcium carbide trolley is provided with two bearing wheels, wherein the two bearing wheels are coaxially arranged and supported on the two guiding rails of the conveying track in a rolling mode. Through the arrangement mode, the steering radius when the calcium carbide trolleysmove on the track can be decreased, thus steering of the calcium carbide trolleys is more flexible, technicians can decrease the size of the corresponding track, and thus the production cost is further reduced; and the rollover preventing structures are arranged, and thus safety of the calcium carbide trolleys during calcium carbide transporting can be ensured.

The embodiment of the invention discloses a data synchronization method, a processor and a vehicle-mounted terminal. The method comprises the following steps: when image acquisition equipment performsimage acquisition according to a set first acquisition rule, determining a timestamp of an image acquired by the image acquisition equipment; when the motion detection equipment performs motion dataacquisition according to a set second acquisition rule, determining a timestamp of the motion data acquired by the motion detection equipment; wherein the second acquisition rule and the first acquisition rule are rules enabling the data acquisition time of the image acquisition device and the data acquisition time of the motion detection device to have an association relationship. By applying thescheme provided by the embodiment of the invention, the accuracy of time synchronism of the image and the motion data can be improved.

The invention provides a combined parallel groove clamp. The combined parallel groove clamp comprises a first cover plate, a first wire clamping plate, a second wire clamping plate and a second cover plate which are arranged in sequence; two first clamping grooves are formed in the side, facing the second wire clamping plate, of the first wire clamping plate; two second clamping grooves are formed in the side, facing the first wire clamping plate, of the second wire clamping plate, and the second clamping grooves correspond to the first clamping grooves and are used for clamping and fixing wires; and through holes are formed in the first cover plate, the first wire clamping plate, the second wire clamping plate and the second cover plate in a stacked mode, the first cover plate, the first wire clamping plate, the second wire clamping plate and the second cover plate are clamped and fixed through bolts penetrating through the through holes, the first wire clamping plate and the second wire clamping plate are made of pure aluminum materials, and the first cover plate and the second cover plate are steel plates. According to the invention, the pure aluminum clamping plate made of the same material as the wire is adopted, so that the occurrence of burn and wire breakage accidents can be reduced, and power transmission is ensured; and a lead is connected and fixed through the cover plate, and use is convenient.

The invention discloses an automatic measuring device used for horizontal displacement of rock soil and a using method of the automatic measuring device. The measuring device comprises a protective barrel which is of a hollow structure, a guide wheel structure and an inner data acquisition and processing part, wherein the protective barrel is divided into an upper guide wheel protective barrel, amiddle sensing part protective barrel and a lower guide wheel protective barrel; the guide wheel structure is arranged in the protective barrel and comprises an upper guide wheel structure and a lowerguide wheel structure that are arranged at an interval; the inner data acquisition and processing part is arranged in the middle sensing part protective barrel and comprises a sensing module, a micro-processing module, a communication module and a power supply module; wherein, an antenna is arranged at the top end of the upper guide wheel protective barrel and is electrically connected with the communication module. According to the measuring device provided by the invention, a measuring manner of tandem type static fixed inclination measurement can be simulated, so that the accuracy of datais ensured; in addition, the measuring device does not need to be in wired connection with an external device, so that the abrasion of cables is avoided, and the waterproof problem does not need to besolved.

The invention discloses a design method of a big-diameter well. The method comprises the following steps: firstly, alternately arranging cast-in-place plain concrete piles and cast-in-place reinforced concrete piles, so that a well wall of the big-diameter well is formed; casting an annular crown beam at the upper side of the well wall of the big-diameter well and arranging reserved steel bars on the annular crown beam; then, arranging a steel ring beam at the bottom of the big-diameter well, filling side seams with gravels and casting a plain concrete ring beam; and then, uniformly paving prefabricated slabs on the upper surface of the annular crown beam, and implementing secondary annular crown beam casting at a formed top, so that a first layer of base plate is formed. With the application of the design method, construction difficulty of the entire big-diameter well is reduced, safety risk is reduced and construction cost is reduced, and meanwhile construction quality is guaranteed.

The invention discloses an engineering machinery gearbox rack durability test connection device and relates to the technical field of engineering machinery. The connection device comprises a flange seat with a through hole. An input flange is arranged on the upper portion of the flange seat, an inner cavity used for sleeving a gearbox input shaft is arranged in the input flange, and a flange connection portion connected with the motor output shaft portion is arranged at the front end. A cover plate connected with the casing is arranged on the shoulder of the flange seat. Compared with the prior art, the device ensures that the input end and the output end of the gearbox are in rigid connection, gearbox durability test is conducted under intensified load, and the durability test time can be effectively reduced.

An auxiliary device of a friction clutch is characterized in that a working cylinder is in a disc shape, an input shaft is fixedly connected with the cylinder, an output shaft is installed in a through hole of a shell through a bearing, magnetorheological fluid is arranged in a cavity of the cylinder, the viscosity coefficient of magnetorheological fluid is influenced by the magnitude of current of a coil, and therefore the magnitude of loads loaded on a driven disc of the clutch is influenced, and the aim of making connection of the clutch smoother is achieved. A magnet exciting coil is fixed to an outer magnetic core which surrounds the outer side of the cylinder, and therefore the magnetic field distribution can be improved, and the auxiliary device works more stably; if the magnet exciting coil is damaged, the magnet exciting coil can be easily replaced, and therefore use performance of the auxiliary device is improved. Due to the fact that the controllability of magnetorheological fluid is high, the auxiliary device rapidly responds to the clutch. After the friction clutch is fully connected, a slide block overcomes the tensile force of a reset spring and is inserted into a machined groove in the cylinder, the output shaft is in rigid connection with the cylinder, the electromagnetic coil can be powered off at the moment, the rigid connection of a transmission system is kept, the auxiliary device does not need to be powered for a long time through the electromagnetic coil, and the high transmission efficiency and high stability of the transmission system are ensured.

The invention provides a prefabricated steel plate-high-ductility concrete coupling beam. The prefabricated coupling beam comprises H-shaped steel, high-ductility concrete, exterior steel plates and T-shaped steel plate connectors. The H-shaped steel is welded to the left sides and the right sides of the exterior steel plates respectively, and the exterior steel plates are welded with one flange plate of the H-shaped steel. Two steel plates of the web portion of each exterior steel plate and the upper and lower steel plates are welded to form a rectangular cavity, and a plurality of T-shaped steel plate connectors are welded on the steel plates on two sides of each web portion in advance. A plurality of casting holes for casting the high-ductility concrete are reserved in the top steel plates of the exterior steel plates. The H-shaped steel on two sides of each exterior steel plate is cast in shear wall limbs on two sides to form the prefabricated coupling beam. The prefabricated coupling beam is easy to construct, high in ductility and good in anti-seismic property.