33results about How to "Reduce blind spots" patented technology

This utility model discloses an ultrasonic endoscope, including an insertion head, which comprises: a head base with a main camera and an illumination module at its distal end; the shooting direction of the main camera and the illumination direction of the illumination module are both set at an angle to the axial direction of the head base; an ultrasonic probe, including an ultrasonic probe base connected to the distal end of the head base, an ultrasonic transducer connected within the ultrasonic probe base for emitting and receiving ultrasonic waves, and a secondary camera and illumination assembly connected to the ultrasonic probe base; the shooting and illumination directions of the secondary camera and illumination assembly are parallel to the axial direction of the head base. By additionally setting a secondary camera and illumination assembly on the ultrasonic probe, the secondary camera and illumination assembly can provide the ultrasonic endoscope with a field of view and illumination in the axial direction. Combined with the main camera and illumination module with lateral shooting illumination on the head base, a larger field of view can be formed, reducing the blind spots of the ultrasonic endoscope when shooting in the digestive tract or other natural orifices.

The lifting device comprises a transmission shaft, a shaft sleeve, an elastic piece, a driving assembly and a rotary mounting part, the transmission shaft comprises an external thread section, a transmission section and a mounting section which are sequentially arranged in the axial direction of the transmission shaft, the shaft sleeve is rotationally mounted on the rotary mounting part and is in threaded connection with the external thread section, and the shaft sleeve is provided with a first limiting part; the elastic piece elastically abuts against the shaft sleeve, so that the shaft sleeve keeps still under the acting force of the elastic piece, and the driving assembly is in transmission connection with the transmission section to drive the transmission shaft to rotate, so that the transmission shaft moves back and forth relative to the shaft sleeve under the interaction of the shaft sleeve and the external thread section and rotates in the first direction. When the tail end of the external thread section moves to the first limiting part, the tail end of the external thread section abuts against the first limiting part in a transmission mode so as to synchronously drive the shaft sleeve to rotate in the first direction. According to the technical scheme, the lifting operation of the cleaning assembly can be driven only through the driving assembly, and the cleaning assembly can be driven to rotate.

The utility model relates to headrest folding technical field discloses a kind of foldable storage's car seat headrest support structure, including seat, the headrest rod is installed in the seat, the similar side of multiple headrest rods is fixedly connected with locking leaf, the lower end of multiple locking leaf is fixedly connected with rotating center rod between adjacent, rotating center rod middle fixed mounting multiple limit stake, the outer wall left and right sides of rotating center rod are rotatably connected with lock plate, spring two is installed in the rotating center rod outer wall between multiple lock plate and limit stake.The utility model in the prior art, when needing to fold headrest, exert force on back cover, and then will act on connecting rod, the force received by connecting rod will act on the top of lock plate, and at the same time, spring two mounted on rotating center rod will be applied, so that the lock plate will rotate under the action of spring two.

The utility model provides a kind of inspection robot, and inspection robot includes: fuselage, tracked mobile chassis, threading component, information acquisition component, controller, power component and navigation module;Tracked mobile chassis includes two tracks, and two tracks are arranged in the both sides of fuselage, and with fuselage movably connected;Threading component and information acquisition component are respectively arranged in the both ends of fuselage, and threading component is fixedly connected with fuselage, and information acquisition component includes infrared camera, and infrared camera is movably connected with fuselage;Controller, power component, navigation module are respectively fixedly connected with fuselage;Tracked mobile chassis, information acquisition component, threading component, navigation module are respectively electrically connected with controller;Tracked mobile chassis, information acquisition component, threading component, navigation module are respectively electrically connected with power component.Inspection robot has the moving ability of adapting complex environment and the work ability of efficient cooperation, and can satisfy the automatic inspection demand under various scenes.

The invention relates to an intelligent computing framework test method based on coverage, and belongs to the field of intelligent computing. According to the method, a framework is abstracted into a code layer, an operator layer and an environment layer, and designed coverage indexes comprise operator coverage, code line coverage, control flow coverage, data flow coverage, concurrency coverage, exception handling coverage, diversified input coverage, operator parameter combination coverage, model structure coverage and hardware coverage; a specific test method is designed according to the characteristics of each coverage degree, the operation performance of the framework under different conditions is evaluated, and potential defects are found out; and designing a comprehensive weighting method, and introducing marginal cost-effectiveness fusion based on defect detection efficiency, redundancy related punishment and dynamic correction based on a test result of each round into a subjective and objective weighting method. According to the method, potential defects and vulnerabilities can be found and positioned in time, the adaptability of the framework to various application scenes and extreme conditions is improved, and the robustness of the system is enhanced.

The utility model relates to the technical field of shot blasting heads, in particular to a shot blasting head special for a hydraulic casting oil duct and capable of blasting shots in multiple directions. The shot blasting head mainly aims at solving the problems that a common shot blasting head mostly adopts a vertical mode for shot blasting, is difficult to use in a bent area in a hydraulic casting oil duct, increases a cleaning blind area in the shot blasting process, directly impacts the inner wall of the oil duct, increases damage to the oil duct, reduces the durable life and reduces the working efficiency. According to the technical scheme, the shot blasting head comprises a connecting piece, a guide assembly is arranged at the bottom of the connecting piece, a shot blasting pipe is arranged at the bottom of the guide assembly, and an inner channel of the shot blasting pipe is arranged in an L shape. The multi-directional shot blasting device realizes multi-directional shot blasting, improves the practicability of a complex casting oil duct, is beneficial to disassembly and replacement, and reduces the maintenance and replacement cost.

This utility model relates to the field of medical device technology and discloses an anesthesia video laryngoscope, including a frame. A screen is installed on the inner side of the frame, and a circuit board is installed on the rear side of the frame. A memory card is disposed on the top wall of the circuit board and engages with the circuit board. A rear shell is fixedly connected to the rear side of the outer wall of the circuit board, and a rotating shaft is rotatably connected to the rear side of the outer wall of the rear shell. A plastic part is rotatably connected to the outer wall of the rotating shaft, and a connector is fixedly connected to the bottom wall of the plastic part. A heat shrink tubing is fixedly connected to the inner top wall of the connector. In this utility model, the light and lens at the bottom of the handle acquire images of the patient's oral cavity and pharynx. After preliminary processing by a second circuit board, the data is further processed by a first circuit board and displayed on the screen. It can adapt to the patient's body posture and anatomical structure at different angles and positions, allowing doctors to observe the surrounding structures more comprehensively and improving the applicability of the laryngoscope.

The application provides a multi-model cooperative detection method and system for traffic abnormal events, and relates to the technical field of intelligent transportation.The method comprises the following steps: constructing a multi-source perception system covering a target traffic area, and obtaining a multi-source traffic data set; performing semantic division based on road structure and traffic operation characteristics, obtaining a plurality of traffic state units, continuously encoding the states, and generating a plurality of time-series traffic state representations; performing traffic state abnormality preliminary screening, and constructing a candidate abnormal traffic event set; inputting a multi-model cooperative analysis framework, performing multi-model joint reasoning, and outputting abnormal traffic event identification results; and combining traffic network propagation characteristics to generate abnormal traffic event response strategies.The application solves the technical problem that the traffic abnormality detection in the prior art often uses a single model to analyze data, which cannot capture multi-dimensional information of complex traffic events, thereby affecting the accurate identification of traffic abnormal events.

This application discloses a building antenna, relating to the field of wireless communication technology. The building antenna includes a base plate, an upper antenna, and a lower antenna. Both the upper and lower antennas are disposed on the base plate. The electromagnetic waves radiated by the upper antenna cover the upper part of a target building, and the electromagnetic waves radiated by the lower antenna cover the lower part of the target building. Both the upper and lower antennas include a substrate and at least two radiating elements. The substrate is disposed on the base plate, and each radiating element is disposed on the substrate and arranged in an array. The number of radiating elements in the lower antenna is greater than the number of radiating elements in the upper antenna. This solution can solve the problem of uneven signal coverage of current building antennas to target buildings.

This invention relates to the field of pipe surface inspection technology, and discloses a new type of composite pipe surface inspection equipment, including a housing with a feed inlet at the front and a movable door on the left side. A fixing plate is fixedly connected to the inner wall of the housing, and the pipe to be inspected is placed on the inner wall. A clamping mechanism, a scraping mechanism, and a feeding mechanism are also provided on the inner wall. When in use, the device moves the camera back and forth laterally while the pipe rotates, reducing blind spots when the camera inspects the outer surface of the pipe, preventing errors caused by strong light generated by oil stains during inspection, and preventing deformation of the pipe during transportation, thus improving the efficiency of pipe replacement for workers.

The invention provides a multi-dimensional parameter flux sensing fusion system based on a multi-core optical fiber, and relates to the technical field of optical fiber communication and optical fiber sensing. The system comprises a multi-core optical fiber, a first fan-in and fan-out module, a second fan-in and fan-out module and a multi-dimensional sensing signal acquisition device, wherein the multi-core optical fiber comprises two independent fiber cores; the input end and the output end of the first fan-in and fan-out module respectively comprise two ports, the two ports of the input end are respectively connected with the communication signal sending unit and the multi-dimensional sensing signal acquisition device, and the two ports of the output end are respectively connected with two independent fiber cores of the multi-core optical fiber; the input end of the second fan-in and fan-out module comprises two ports which are respectively connected with two independent fiber cores of the multi-core optical fiber, and the output end of the second fan-in and fan-out module is connected with the communication signal receiving unit. According to the invention, integration of communication and sensing is realized, the function integration level is high, and the resource utilization rate is high. The method can be widely applied to various complex environments such as electric power communication networks, submarine cables, comprehensive pipe galleries, rail transit and oil and gas pipelines.

The utility model provides a double-blade dispersion machine with optimized dispersion effect, which comprises a machine barrel, a driving motor, a rotating shaft, an upper dispersion piece, a conical flow guide cover and a lower dispersion disc piece, the upper dispersion piece comprises an upper dispersion disc and upper dispersion blades, the conical flow guide cover is arranged on the rotating shaft and is arranged between an upper thread adjusting section and a lower thread adjusting section, and the lower dispersion disc piece comprises a lower dispersion disc and a lower dispersion blade. The lower dispersing disc piece comprises a lower dispersing disc and lower dispersing blades, and the inclination direction between the upper dispersing blades and the upper dispersing disc is opposite to the inclination direction between the lower dispersing blades and the lower dispersing disc. The dispersion device has the beneficial effects that the inclination direction between the upper dispersion blade and the upper dispersion disc is opposite to the inclination direction between the lower dispersion blade and the lower dispersion disc, so that multidirectional shear force can be generated, eddy current can be broken, the dispersion uniformity can be improved, and the distance between the upper dispersion disc and the lower dispersion disc can be adjusted through the arrangement of the upper thread adjusting section and the lower thread adjusting section; the device adapts to materials with different viscosities, and the application range is expanded; the conical flow guide cover can promote material circulation.

The utility model relates to a walking board type illuminating lamp installation structure and a crane walking board, the walking board type illuminating lamp installation structure comprises a supporting part and an illuminating part, the supporting part comprises a walking board body and an installation plate, the surface of the walking board body is provided with an installation opening, the installation plate is installed at the installation opening, and the illuminating part is installed on the supporting part. A hinge is arranged between one side of the mounting plate and the mounting opening; the lighting part comprises a lamp panel and a connecting rod, one end of the connecting rod is connected with the top of the lamp panel, the other end of the connecting rod is connected with the mounting plate, and the lamp panel is arranged on one side of the bottom of the walking board body. The lamp panel is simple in structure, the whole lamp panel is installed at the bottom of the walking board body in a hidden mode through overturning of the installation plate, it is avoided that an illuminating lamp is installed on the outer side of the walking board to affect the using space of a crane, blind areas on the walking board side are reduced, and the utilization efficiency of the crane is improved.

This utility model belongs to the technical field of medical device disinfection equipment, specifically relating to an automatic disinfection micro-volume blood collection tube sterilization box, including an outer shell assembly, a storage mechanism, a dispensing mechanism, and a sterilization mechanism. The outer shell assembly includes a base, supporting side plates, a top cover, and a front panel. The storage mechanism is located inside the upper part of the outer shell assembly, including an inclined storage base plate and limiting sidewalls located on both sides of the storage base plate. The dispensing mechanism is installed at the end of the storage base plate and includes a rotating shaft, a dispensing roller, and a stepper motor. The sterilization mechanism includes a first sterilization group and a second sterilization group. The first sterilization group is installed on the top of the storage mechanism, and the second sterilization group is installed on the inner top wall of the discharge chute. This utility model achieves precise automatic dispensing of a single micro-volume blood collection tube, ensuring the aseptic use of medical consumables, effectively preventing infection during blood collection, and improving the ease of operation and portability for medical personnel.

This utility model discloses a coal mine transportation and pushing device, specifically relating to the field of coal mine transportation technology. It includes a conveyor platform, with a support and adjustment device fixedly connected to the lower end of the conveyor platform. A base plate is fixedly connected to the lower end of the support and adjustment device. A fixed frame is fixedly connected to the upper right side of the conveyor platform, and a dust collection and filtering device is fixedly connected to the upper end of the fixed frame. The coal mine transportation and pushing device of this utility model can be flexibly adjusted by tilt angle, enabling the coal mine transportation equipment to combine high efficiency, safety, and economy. Coal mine roadways have varying slopes; the adjustable tilt angle allows the equipment to quickly match the roadway undulations, avoiding material accumulation or slippage due to incompatible slopes. The same equipment can adapt to different transportation needs through angle adjustment, reducing equipment model dependence. An appropriate tilt angle can accelerate the descent of materials using their own weight, reducing conveyor belt drive power and saving energy consumption. The tilt angle also helps materials flow smoothly, improving transportation continuity.

The utility model relates to the technical field of high polymer materials, in particular to a polytetrafluoroethylene dispersion resin condensing and stirring device for a dry-method electrode binder, which comprises a condensing barrel, a stirring device, a stirring device, a stirring device and a stirring device, the top of the condensing barrel is provided with a driving mechanism, and the inner wall of the condensing barrel is provided with deflection baffles; the top of the stirring rod extends out of the coagulation barrel and is connected with the driving mechanism, and the bottom extends into the inner cavity of the coagulation barrel; the lower inclined paddle is arranged at the bottom of the stirring rod; the vortex stirring paddle is arranged at the bottom of the stirring rod and is positioned below the lower inclined paddle. The polyfluortetraethylene dispersion resin condensing and stirring device for the dry-method electrode binder, provided by the utility model, can adjust the specific gravity of dispersion resin mother liquor to a lower level so as to produce dispersion resin fine powder with uniform particles, and is good in fiber forming effect, high in fiber forming rate and not easy to break. When being used as a dry-method electrode binder, the active carbon particles exist in a fiber state, so that the contact between the active carbon particles and between the active carbon particles and conductive agent particles is tighter, and the electrode has the advantages of high density, good conductivity, high capacity and the like.

The invention discloses a multifunctional contact angle measuring device, and the device comprises a bearing platform which is used for placing a to-be-measured sample; the driving assembly is arranged on the bearing platform, and a first imaging module and a second imaging module are arranged on the driving assembly; the first imaging module comprises a first photosensitive element and a light path steering assembly; the second imaging module comprises a second photosensitive element and a three-dimensional imaging optical assembly, and the three-dimensional imaging optical assembly is configured to capture light rays from the surface of the to-be-detected sample and guide the light rays to the second photosensitive element, so that an image containing multi-view information or depth information of liquid drops on the surface of the to-be-detected sample is formed on the second photosensitive element. The measuring device has double functions of traditional side-looking measurement and top 3D shape measurement. For a conventional flat sample, rapid and standard contact angle measurement can be carried out by using the first imaging module; for a special sample with a concave surface or a complex shape, the second imaging module can be used for supplementary measurement.

The utility model discloses a high-efficiency bird repelling device for grape planting, which relates to the technical field of bird repelling devices and comprises a support column, a bird repelling mechanism is slidably connected in the support column, a mounting frame is movably connected to the top of the support column, and a rotating mechanism is rotatably connected in the mounting frame. A servo motor drives a first rotating rod to rotate, a first gear and a conveying wheel are synchronously driven to rotate, the first gear is meshed with a second gear, a first bevel gear is made to rotate through a second rotating rod, a second bevel gear is made to rotate through a second rotating rod, and a linkage frame is fixedly connected to the top of the linkage frame, and a supporting rod is fixedly connected to the top of the linkage frame. Meanwhile, the conveying wheel drives the mounting frame and the reflective mirror to horizontally rotate through the conveying belt, and finally vertical-horizontal composite rotation of the reflective mirror is achieved, the irradiation range of the reflective mirror is enlarged, all-directional coverage of the reflection angle is achieved, the irradiation blind area is effectively reduced, and then the bird repelling effect is improved.

The invention relates to the technical field of electroencephalogram signal monitoring, in particular to an electroencephalogram signal abnormal state recognition method based on theta-gamma cross frequency coupling characteristics, which comprises the following steps: acquiring an intra-operative electroencephalogram signal of a patient and segmenting the electroencephalogram signal to obtain segmented electroencephalogram signals; filtering, denoising and self-adaptive artifact elimination processing are carried out to obtain a preprocessed electroencephalogram signal; extracting multi-dimensional electroencephalogram features from the preprocessed electroencephalogram signals, extracting alpha-wave average power, theta-wave phase, normalized instantaneous frequency deviation, gamma-wave amplitude envelope and theta-wave average power by adopting Hilbert transform, calculating theta-gamma coupling strength, constructing a multi-dimensional electroencephalogram feature vector, and calculating the multi-dimensional electroencephalogram feature vector; meanwhile, the explosion suppression ratio of the preprocessed electroencephalogram signals is calculated to serve as an auxiliary feature; and performing anomaly identification based on the multi-dimensional anesthesia state feature vector and the auxiliary feature. According to the technical scheme, the misjudgment risk caused by single characteristic fluctuation can be reduced, and the reliability of electroencephalogram signal abnormity monitoring in the anesthesia process is improved.

The invention discloses a nondestructive testing method and system for grouting compactness of a prefabricated bridge pier duct, particularly relates to the technical field of nondestructive testing of materials, and is used for solving the problem that an existing ultrasonic testing technology is insensitive to microcosmic nonuniformity response of a grouting material. The method comprises the following steps: transmitting a first fundamental frequency ultrasonic incident signal into a prefabricated bridge pier duct, collecting a reflection echo signal, repeatedly executing to obtain a plurality of echo signals, calculating a coherence coefficient, and judging whether the coherence coefficient is higher than a preset threshold value or not to perform macroscopic defect screening. When the coherence coefficient is higher than the threshold value, at least one second fundamental frequency ultrasonic incident signal is emitted, corresponding echo signals are collected, the waveform asymmetry coefficient of each echo signal is calculated, and finally the microcosmic non-uniformity of the grouting material is evaluated based on the variation trend of the waveform asymmetry coefficients under different fundamental frequencies. And comprehensive grouting quality evaluation from macroscopic to microscopic is realized.

This application relates to an antenna deployment method, apparatus, computer equipment, and storage medium. The method includes: acquiring operating parameter data of each component in a radio frequency identification (RFID) system; wherein the components include antenna clusters and electronic tags; the antenna clusters include at least two antennas forming a through-beam architecture; determining the target distribution layout of each antenna based on the operating parameter data; wherein the target distribution layout includes the target antenna angle and target antenna spacing between antennas in each antenna cluster; establishing a spatial energy distribution model based on the target distribution layout; and determining the target electric field intensity after the interference superposition of the radiation fields between each antenna in the antenna cluster based on the spatial energy distribution model. Thus, by optimizing the layout of multiple antenna clusters, the directivity of the main beam can be effectively controlled, sidelobe radiation reduced, and the misread rate to adjacent areas lowered; by employing a through-beam architecture or multi-antenna collaborative operation, electronic tags can be covered from different angles.

The application discloses a kind of inter-vehicle camera-based static calibration method and system of workshop, it is related to target calibration technical field.The method includes the following steps: obtaining the vehicle to be calibrated image obtained by surround view camera, pre-processing to-be-calibrated image;Parameter correction model and distortion correction model are constructed;Parameter correction model is used to correct the parameter of to-be-calibrated image, and calibration image is obtained;Calibration image is processed using distortion correction model, eliminate image distortion, and obtain the calibration image after correction;After registration, fusion and splicing, the final image is obtained after calibration image after correction.This application reduces the cost requirement by using online calibration method, and uses double neural network to optimize the parameters of calibration process, improves the accuracy of camera calibration.

The utility model discloses a light therapy rehabilitation is with shading bed curtain, specifically relates to light therapy rehabilitation is with shading bed curtain technical field, including bed frame, the one side fixed mounting of bed frame has adjusting mechanism, the inside fixed mounting of bed frame has a plurality of shading cloth structure, and the bed frame includes the installation frame, the bottom fixed mounting of installation frame has the tightening cover, the bottom fixed mounting of tightening cover has the collection and binding cover, the inside movable mounting of collection and binding cover has collection and binding rope. This light therapy rehabilitation is with shading bed curtain, through setting up the tightening collection and binding rope's mode control collection and binding cover shrink and then will tighten cover tightly in medical bed, ensure that the bed curtain and medical bed closely fit, reduce the shading dead angle, effectively block external light source, ensure that the light of light therapy equipment is the most main light source, through the reflection layer reflection light ray blocks the light ray and shoots, through the heat preservation layer promotion shading cloth structure's heat preservation performance, through the skin layer promotion shading cloth structure's touch to ensure the use experience.

The invention discloses a three-dimensional scene reconstruction method in a complex environment, which has the functions of capturing scene information and constructing a three-dimensional model by adopting a neural network, and is characterized in that the scene information capturing step comprises the following steps of: firstly, capturing a scene high-resolution image from multiple angles, performing standardization processing such as color correction and noise removal and the like; and then depth information of each pixel is extracted through geometric layout, and consistency and integrity of data are ensured. According to the step of constructing the three-dimensional model through the neural network, according to collected scene data information, through spatial decomposition and assumption that the intersection part of light and a sampling point is a sphere, the sampling process is optimized, input information is simplified, and the network modeling efficiency is improved; the network comprises a density neural network and a color neural network which output volume density and color information of a scene respectively, and then the density and color information are integrated through a volume rendering technology to generate a high-quality three-dimensional model. According to the invention, the accuracy and efficiency of three-dimensional reconstruction are obviously improved.

The invention discloses an intelligent decision support method for whole-process engineering consultation based on a knowledge graph, and aims to solve the core problems of information island, experience dependence, risk response lag, low compliance examination efficiency, difficulty in knowledge precipitation and the like in engineering consultation. According to the method, a field ontology covering the full life cycle of a project is constructed, multi-source heterogeneous data such as BIM, contracts, specifications and logs are fused, a structured triple is extracted by using a natural language processing technology, and a high-quality knowledge graph is constructed and continuously evolved; on the basis, rule reasoning, graph neural network semantic reasoning and causal influence propagation models are embedded, and intelligent decision making of risk assessment, cost estimation, compliance review and progress optimization is achieved. According to the method, the decision scientificity, the risk prevention and control capability and the consultation service intelligence level are remarkably improved, and the method has good engineering application value.

The utility model relates to the technical field of laboratory fume cupboards, in particular to a closable fume cupboard which comprises a cupboard body. The device further comprises a temporary storage bin, a sealing plate, a sliding door and gloves. The number of the temporary storage bins is two, and the two temporary storage bins are arranged on the two sides of the cabinet body in the length direction of the cabinet body. The two sliding doors are arranged on the cabinet body in a sliding mode in the length direction of the cabinet body, and the two sliding doors move in the opposite directions; the gloves are arranged on the sliding doors, and driving grooves are formed in the side walls of the two sides of the cabinet body in the width direction of the cabinet body. The closing plate is arranged in the driving groove in a sliding mode, when the two sliding doors are closed, the closing plate extends out of the driving groove and makes contact with the sliding doors, and the closing plate, the sliding doors and the cabinet body jointly form an experiment cavity used for experiments. The glove can adapt to toxic tests and non-toxic tests, and the service life of the glove is prolonged.

The utility model discloses a snow throwing vehicle, which relates to the technical field of snow throwing vehicles and comprises a vehicle frame, a cab is arranged on the front portion of the vehicle frame, a carriage is arranged on the rear portion of the vehicle frame, snow cutting wheels are arranged in front of the cab, and a transmission case is arranged between the two snow cutting wheels. A snow throwing bin is rotationally connected to the rear portion of the push shovel and located in the middle, a snow throwing barrel is arranged on one side of the top of the snow throwing bin, a snow throwing wheel is arranged in the snow throwing bin, and a snow throwing wheel rotating shaft is arranged in the middle of the snow throwing wheel. The frame is provided with a rotation driving device used for driving the snow throwing bin to rotate left and right. A transmission shaft connected with a power output device is arranged in the frame; the transmission shaft is fixedly connected with a snow throwing wheel rotating shaft and a transmission box in sequence through a universal joint connecting rod; and the lifting device is arranged between the cab and the frame and is used for lifting the cab. According to the snow blower, the view blind area during snow removal operation can be eliminated, safety and efficiency of snow removal operation are guaranteed, and meanwhile snow throwing is more flexible and efficient.

The utility model discloses a pipe flange automatic argon arc welding machine, including frame, turnover subassembly, horizontal movement linear module and welding torch head, one side of frame is provided with mounting seat, and one end of mounting seat is provided with turnover subassembly, and turnover subassembly includes servo motor, planetary reducer and rotating box, one end fixed with servo motor of mounting seat is connected with planetary reducer of servo motor's output shaft, and the output shaft of planetary reducer is connected with rotating box, one end of rotating box is provided with rotating subassembly, and rotating subassembly includes reduction motor, driving gear, gear ring and rotating seat, the inside fixed with reduction motor of rotating box is connected with driving gear of reduction motor's output shaft, the utility model discloses the setting of rotating subassembly, when utilizing three jaw chuck to hold the end of flange or pipeline, can start reduction motor, make it through driving gear and gear ring drive rotating seat rotation, can carry out turnover to pipe flange class workpiece to the welding range of expansion.

The invention belongs to the technical field of automobile accessories, and discloses an adjustment-free spherical vehicle rearview mirror with a waterproof coating, which comprises a hemispherical mirror, connecting columns are fixedly mounted at the upper end and the lower end of the right side of the hemispherical mirror, a fixing plate is fixedly mounted on the right sides of the connecting columns, and a suction cup is fixedly mounted on the right side of the fixing plate. A suction cup opening is formed in the right side wall of the suction cup; the outer wall of the fixed plate is rotatably provided with a knob, and the upper and lower ends of the left side wall of the knob are provided with rotating grooves for the knob to rotate. When a large vehicle is turned and backed up, due to the fact that the hemispherical mirror of the device is wide in reflection angle and large in look-around area, when the vehicle moves greatly, most blind area positions of the vehicle can be observed without adjusting the reflection angle of the hemispherical mirror, the view field of a driver is optimized, and driving safety is greatly improved; and the traffic accident risk caused by the limited visual field is reduced.