1121results about How to "Low failure rate" patented technology

The invention relates to an ice crystal evaporator and an ice crystal water cooling device producing from the same, belonging to the technical field of refrigeration. The ice crystal evaporator is characterized in that a liquid inlet channel is formed by an evaporator tube, a liquid inlet and a liquid outlet in a tubular casing; and the outer channel of the evaporator tube of the tubular casing is divided into more than one S-shaped channel forming a water return channel through a water inlet of a water divider and a water outlet of a water collector. The ice crystal water cooling device is characterized in that the return air inlet of the ice crystal evaporator is communicated with a compressor, a condenser, a liquid feeding valve, a dry filter, a liquid feeding electromagnetic valve anda thermostatic expansion valve in sequence, and then is communicated with the liquid inlet of the ice crystal evaporator; a cooling water inlet / outlet of the condenser is connected with a cooling tower in series; and a water inlet / outlet of the ice crystal evaporator is communicated with a water circulating pump and an ice crystal energy storage tank in series. The invention has the advantages ofhigh cooling efficiency, no icing and low cooling temperature and is suitable for production of energy storage central air-conditioning, marine fishing, seafood processing, fruit, vegetable or meat processing, and the like; the cooled medium is municipal water.

The invention discloses an electromagnetic transient simulation and mapping method and system oriented to multi-physics field coupling, and belongs to the technical field of substation digital operation and maintenance and electromagnetic simulation. Deploying multiple types of sensors in a transformer substation, preprocessing the acquired multi-physical field data, and fusing with the three-dimensional twinborn model; a coupling algorithm is adopted to carry out multi-physical field coupling analysis, multi-physical quantity display and thermodynamic diagram superposition are realized, and scene evolution change simulation under various typical working conditions is supported; a micro-service architecture is adopted to construct a digital twin system, double closed-loop verification of simulation and actual measurement is performed through actual measurement data and simulation data of a real-model test field, model optimization is completed, and real-time mapping of electromagnetic transient dynamic simulation and a transformer substation physical entity is realized. The method improves the precision of model and entity mapping, meets the requirements of real-time tracking and response of the electromagnetic transient change of the transformer substation, adapts to the digital transformation of different transformer substations, and provides a basis for the operation and maintenance of the transformer substations.

The utility model discloses a water-driven self-pressure-relief buried telescopic sprinkling irrigation device, and belongs to the technical field of agricultural irrigation. The water-driven self-pressure-relief buried telescopic sprinkling irrigation device comprises an outer pipe assembly, an inner pipe is arranged in the outer pipe assembly in a sliding mode, the upper end and the lower end of the inner pipe are fixedly provided with a spray head and a sliding base respectively, the sliding base divides the interior of the outer pipe assembly into a first inner cavity and a second inner cavity, and the spray head extends to the exterior of the outer pipe assembly; a self-pressure-relief assembly is arranged in the sliding seat in a sliding mode, and a plurality of connecting holes matched with the self-pressure-relief assembly are formed in the sliding seat. According to the technical scheme, the buried telescopic sprinkling irrigation device can be driven up and down through water resources, and meanwhile, pressure self-relief can be achieved.

The application discloses a plastic solid waste recycling device and belongs to the technical field of plastic recycling. A fixed mold assembly is fixedly arranged on an equipment table. A movable mold assembly is movably arranged on the equipment table. A linkage member is movably arranged on the equipment table and is provided with a linkage plug on the side facing the movable mold assembly. An outer wall of the side of the fixed mold assembly facing the movable mold assembly is provided with an insertion block. The outer wall of the side of the insertion block facing the movable mold assembly is provided with a locking cavity. The movable mold assembly is axially provided with a penetrating insertion cavity. The insertion block is slidably arranged in the insertion cavity to realize preliminary locking. The linkage plug is slidably arranged in the locking cavity to realize relocking. The multistage locking structure is matched with the integrated sealing design. After the mold is closed, the locking is firm, the melt pressure in the injection molding process is effectively resisted, the problems of loosening and deviation of the mold are avoided, the sealing performance of the butt joint surface of the mold is greatly improved, the overflow and leakage phenomena are completely eliminated, the quality of the plastic product is ensured, and defects such as flash and uneven wall thickness are reduced.

The invention belongs to the technical field of internal combustion engine power devices, and discloses a double-piston mechanism for an internal combustion engine, which comprises a cylinder body, and more than one cylinder is arranged in the cylinder body; an air inlet seat and an air outlet seat are installed on the upper portion and the lower portion of the cylinder body respectively, an air inlet pipe and an air outlet pipe are arranged in the air inlet seat and the air outlet seat respectively, and an air inlet channel and an air outlet channel are arranged in the air inlet pipe and the air outlet pipe respectively. A control device for gas distribution is arranged at the corresponding position of each cylinder; a high-pressure oil pump is arranged outside the cylinder body, and the high-pressure oil pump is communicated with the oil sprayer through a high-pressure oil pipe; a piston assembly I and a piston assembly II are symmetrically arranged in each cylinder body, and a bevel gear set I and a bevel gear set II which are matched with the piston assembly I and the piston assembly II to transmit power are further arranged in each cylinder body. The power performance of the internal combustion engine can be improved through the two piston assemblies, the device is small in size and light in weight, and single-machine fuel consumption and operation cost are effectively reduced.

This invention belongs to the field of automotive assembly technology and discloses an automated production line and control method for double-sided machining of workpieces with dual spindles. It includes a flipping mechanism, a dual-spindle machining mechanism, a raw material conveying mechanism, a finished product conveying mechanism, a robot, and a workstation conveying mechanism. The machining devices of the dual-spindle machining mechanism are spaced apart on the chassis. The lifting platform of the flipping mechanism is located next to the chassis. A flipping gripper is fixedly mounted on the chassis and positioned above the lifting platform. The rotating mechanism of the flipping gripper drives the clamping mechanism to rotate horizontally by 180 degrees. Two spindle boxes are slidably connected to the upper part of the chassis. The spindle is located inside the spindle box, with its lower end extending out of the lower end of the spindle box and fixedly connected to a spherical positioning chuck. The robot is positioned between the raw material conveying mechanism, the finished product conveying mechanism, and the workstation conveying mechanism. This invention achieves automatic workpiece flipping, avoids positioning errors and clamping eccentricity, uses air blowing to clean foreign objects from the chuck, detects the airtightness of the positioning surface, prevents workpiece deformation, and extends the service life of the equipment.

This utility model proposes a centralized power distribution box for subway tunnels, comprising: a box body and a fixing assembly. A fan is installed on the box body; a window is opened on the box body, and an air inlet assembly is rotatably connected inside the window. The outer wall of the air inlet assembly fits against the inner wall of the window. The air inlet assembly includes two symmetrically arranged air guide chambers, each with a fan-shaped cross-section. A first filter screen is provided on the arc-shaped surface of each air guide chamber, and an opening is provided on each air guide chamber located inside the box body. A limiting plate is provided on each air guide chamber, abutting against the inner wall of the box body. The fixing assembly is mounted on the box body. This utility model's centralized power distribution box for subway tunnels can utilize the piston-like wind effect during subway operation to further accelerate the airflow inside the power distribution box, thereby ensuring the electrical performance inside the power distribution box and reducing the failure rate.

The utility model provides a kind of in-out boat structure and coating equipment, wherein the in-out boat structure includes lifting drive device, for driving at least two translation drive devices synchronous lifting movement;Translation drive device, for driving the corresponding translation movement piece of each translation drive device synchronous reciprocating translation movement;At least two boat moving assemblies, respectively installed on corresponding translation movement piece, the corresponding support paddle of at least two boat moving assemblies is respectively used to move at least two carriers boat into and out of at least two reaction cavities.The in-out boat structure provided by the utility model can move at least two carriers boat into and out of each group of at least two reaction cavities in the height direction of furnace body synchronously layer by layer, shorten the length of reaction cavity and narrow it under the premise of not reducing production capacity, shorten the cantilever length of support paddle of in-out boat structure adaptively, improve the rigidity of cantilever structure, reduce the scratching of carrier boat caused by cantilever deformation and shaking and the failure rate of coating equipment, and improve the working stability of coating equipment.

The utility model belongs to the technical field of pot seedling transplanters, and particularly relates to a linkage type seedling taking device of a transplanter, which comprises an upper seat plate, a seedling taking claw support is slidably mounted on the bottom surface of the upper seat plate, a seedling taking claw component is slidably mounted on the seedling taking claw support, and the sliding directions of the seedling taking claw support and the seedling taking claw component are perpendicular to each other. The seedling picking device is characterized in that a support driving air cylinder is installed on the front side of the seedling picking claw support, a swing driving air cylinder is installed at the bottom of the seedling picking claw support, the structure of a driving device is simplified, the power transmission efficiency is improved, the daily maintenance cost is reduced, and the seedling picking device has high environment adaptability.

The application discloses a grey cloth placing tool and method for floor mat production, and relates to the technical field of industrial automation production. The machine frame is provided with an X-axis driving module, a Y-axis driving module and a Z-axis driving module matched with the cloth lifting module and used for driving the cloth lifting module to move on the machine frame. The application has the advantages that the grey cloth lifting, conveying and flattening are integrated through the cooperation of negative pressure adsorption and tension control structure, and wrinkles are effectively inhibited; the double-mode adsorption of negative pressure and high-frequency vibration is adopted, high-permeability and conventional grey cloth are compatible, and the adsorption failure problem is solved; the vibration structure is self-driven by airflow, and no additional power is needed, so that the structure is simple and reliable; the multi-point flexible adsorption is matched with the rotatable mechanism, so that the grey cloth is protected from damage; the three-axis linkage and modular design improve the automation and universality, adapt to efficient continuous production, and improve the production quality, efficiency and equipment applicability of the floor mat.

The utility model relates to moxa stick processing technical field, concretely is a kind of cutting device for moxa stick processing, including base, fixed mounting is equipped with fixed frame on the base upper surface, work, first moxa stick is placed in the inside of curved groove one of bearing platform surface, before cutting, push cover plate, and the curved block under cover plate slides in curved groove one, moxa stick is pushed to specified cutting position, hand wheel is rotated to drive threaded lead screw rotation, threaded lead screw drives fixed link to move down, using the cooperation of curved groove two and curved groove one, moxa stick is firmly fixed, then, through handle lever, lever drives mandrel and gear rotation, gear engages driven wheel, makes driven wheel rotate, and further drive inclined tooth bar to make inclined motion along the track of sliding slot one, since inclined tooth bar is fixedly connected with cutter bar, and inclined lever is guided by the sliding cooperation of sliding slot two and convex shaft two, cutter bar drives cutting knife to realize up-down cutting action, complete a cutting process, so circulate, realize the continuous accurate cutting of moxa stick.

The application discloses a kind of pneumatic directional drilling system and drilling method suitable for local water-containing soft coal seam, including directional drill bit, screw drill, conversion nipple, non-magnetic drill tool, multiple special directional drill pipes and air feeder connected in order from back to front;The screw drill includes output shaft end head connected with the directional drill bit and stator end head sleeved on one side of output shaft end head, and output shaft end head can rotate relative to the stator end head, by setting screw drill and conversion nipple, both directional drilling in water-containing soft coal seam can be guaranteed, and strong blowing process can be implemented to discharge drill cuttings and formation water in hole to outside of hole in time, keep drilling operation continuous and smooth, greatly reduce the amount of operation of pulling down drill during construction, and the comprehensive drilling efficiency can be improved by more than 20%, solve the technical problems of poor formation adaptability of prior art, and cannot realize strong blowing and cuttings discharge and rapid switching of directional drilling during directional hole construction process in local water-containing soft coal seam, resulting in low drilling efficiency.

The present application relates to coffee cold extraction liquid ultra-high pressure extraction equipment technical field, specifically to a kind of coffee cold extraction liquid ultra-high pressure extraction equipment and extraction process, including extraction equipment ontology, the one side of the extraction equipment ontology is provided with liquid supplementing device, further include: for inductive material volume micro shrinkage change and automatically adjust extraction length of time inductive adjustment mechanism, the inductive adjustment mechanism includes conveying pipe.The present application is by being equipped with inductive adjustment mechanism and other components, by the cooperation between each component, the cooperation relationship that float ball inductive liquid supplementing flow change and drive connecting rod rotation, so that moving block can be controlled by position change extrusion block and the trigger state of extension block, further reached the effect that the device can be based on the volume micro shrinkage change of coffee cell rupture and realizes extraction end point automatic detection, without manually setting extraction time, adaptive different varieties, roasting degree and grind degree material, from root to solve the problem of traditional timing control exists extraction deficiency or over-extraction.

The utility model discloses an adjustable anti -film winding automatic injection device of blowing direction relates to cigarette packet film -tearing technical field, aims at solving the problem of raw material loss caused by the adsorption of film winding clamp and film and tobacco sheet due to the pressure difference when the existing pneumatic clamp is in the process of disassembling cigarette packet film. The device comprises a support, a clamp, a cylinder, a gas top rod and a multi-pipeline gas distribution are equipped on the support, the gas distribution is connected with the gas source through the gas pipe and is installed with the universal nozzle. When working, the clamp clamps the film, and the universal nozzle sprays the airflow, so that the film is kept below the clamp to avoid winding and eliminate the adsorption effect of the film and the tobacco sheet. The utility model through the airflow dynamic regulation and control, effectively reduces the shutdown maintenance frequency and raw material loss, and improves the production benefit of the tobacco primary processing technology.

The utility model relates to the technical field of household appliances, and provides a bottom plate structure and cooking equipment, the bottom plate structure is used for the cooking equipment, the cooking equipment comprises a heating cavity, a drainage structure is arranged on a cavity base of the heating cavity, the bottom plate structure comprises a bottom plate, the bottom plate is arranged below the cavity base, and a water storage structure is arranged on the bottom plate. The water storage structure is arranged below the drainage structure, the water storage structure comprises a water storage tank, the water storage tank is used for receiving water vapor overflowing from the drainage structure, and a reinforcing structure is arranged on the peripheral side of the water storage tank. According to the bottom plate structure, the water storage structure is arranged below the water drainage structure, so that water vapor is accumulated in the water storage tank when permeating into the bottom plate through the water drainage structure, and the situation that the water vapor overflows out of a table top through the bottom plate and influences the cleanliness of the table top is prevented; the reinforcing structure is arranged on the peripheral side of the water storage tank, the structural strength and stability of the water storage structure are enhanced, and therefore the structural strength of the bottom plate is enhanced.

The utility model discloses a solenoid valve driver, including socket combination - shell assembly and the circuit board - shell cover assembly that is connected with socket combination - shell assembly through shell cover screw (31), socket combination - shell assembly includes shell (1) and the socket combination (2) that is connected with shell (1), socket combination (2) includes socket (21), the plug (22) that is connected with socket (21), pin (23), socket screw (24) for fixing socket (21) on shell (1) and set up between socket (21) and shell (1) O ring (25), the circuit board - shell cover assembly includes the shell cover (3) that is connected with socket combination - shell assembly, sets up the circuit board (4) of shell cover (3) near shell one side and sets up cable (5) on the other side of shell cover (3). The utility model provides a solenoid valve driver can reach better sealing stability.

The utility model relates to the technical field of free cleaning fans, in particular to a free cleaning fan cotton suction pipe structure with a cotton suction box, which comprises a first branch pipe, a second branch pipe and a cotton suction box body, and connecting pieces are arranged between the first branch pipe and the cotton suction box body and between the second branch pipe and the cotton suction box body. The empty groove is formed in the cotton suction box body, a filter plate is arranged in the empty groove, and a sealing plate is fixed to one side of the filter plate; the cotton suction box comprises a cotton suction box body, a sealing plate arranged on the cotton suction box body, a filter plate arranged on the cotton suction box body, a mounting mechanism arranged between the cotton suction box body and the sealing plate, and a positioning mechanism arranged between the cotton suction box body and the filter plate. The independent cotton suction box body containing the filter plate is installed between the first branch pipe and the second branch pipe, the independent dust suction mode of all machines can be achieved, the filter plate can be rapidly and timely installed and detached through the installation mechanism, and dust adsorbed on the filter plate is cleaned.

This utility model discloses a top cover, a box-type power station, and a box-type room. The top cover includes a cover plate, an upper baffle, a lower baffle, and a perforated plate. The cover plate includes a downward-curving eave. The upper baffle abuts against the cover plate. The lower baffle includes a bottom and at least one side. The perforated plate is located inside and below the cover plate, and its edges abut against the lower baffle. The perforated plate and the cover plate are joined together to form a first air duct. The eave, the upper baffle, and the lower baffle are staggered and joined together to form a curved second air duct. This utility model can achieve better ventilation and heat dissipation effects and a higher level of protection.

The invention belongs to the technical field of freight unmanned aerial vehicle delivery, and relates to an intelligent cabin door system for an unmanned aerial vehicle and a cabin door structure design method. The system comprises a driving system, a reel system, a curtain plate system, a sliding rail unit and a control unit. The control unit is electrically connected with the driving system; the driving system is arranged on the unmanned aerial vehicle body; the curtain plate system is connected with an unmanned aerial vehicle body through the sliding rail unit, the curtain plate system is connected with the reel system, the driving system is in transmission connection with the reel system through a chain wheel transmission structure, and the driving system drives the reel system to rotate so as to drive the curtain plate system to stretch or retract along the sliding rail unit. Opening and closing of the cabin door are realized. According to the invention, the number of moving parts is greatly reduced, the probability of clamping stagnation and wear failure of a mechanical transmission mechanism is fundamentally reduced, and the operation reliability of a cabin door system in harsh operation scenes such as emergency logistics and disaster rescue is remarkably improved.

This utility model discloses an independently separate double-helix auger, relating to the field of auger conveying technology. It aims to solve the problems of high failure rate, easy jamming, and easy breakage of gearbox chains in existing cross-type augers. The auger includes a mounting box, a conveying chamber, and a gearbox. The conveying chamber is equipped with a partition that separates the two sets of conveying augers into their respective independent conveying channels, effectively preventing the auger blades from interfering with each other and stones from getting stuck. The two sets of conveying augers achieve synchronous rotation through a connecting gearbox. The gearbox is directly connected to the shaft of one of the auger sets, replacing chain drive. Connectors with buffer or overload protection functions are used at the connection points to prevent chain breakage and improve equipment reliability. The partition is composed of multiple partition plates spliced ​​together, using connecting noses, mounting slots, and grooves for detachable, quick installation and disassembly, greatly improving the equipment's adaptability to different materials and facilitating cleaning and maintenance.

The application discloses a new energy electric drive system of a novel green intelligent carrying frame, which comprises a multi-source energy supply module, an intelligent driving module, an energy efficiency control module, an energy recovery module and a communication interaction module.The multi-source energy supply module is used for supplying energy under different working conditions for the carrying frame.The intelligent driving module is used for driving walking mechanisms arranged on both sides of the carrying frame.The energy efficiency control module is used for generating a dynamic energy consumption adjustment decision by using an energy consumption optimization algorithm and sending the decision to the multi-source energy supply module and the intelligent driving module.The energy recovery module is used for monitoring the running state of the carrying frame in real time to start an energy recovery process and output electric energy to the multi-source energy supply module.The communication interaction module is used for establishing an information transmission channel between the intelligent driving module, the energy efficiency control module and a warehouse intelligent scheduling system.The novel green intelligent carrying frame has the remarkable effects that the green environmental protection, energy utilization efficiency and intelligent operation capacity of the carrying frame are remarkably improved through multi-element new energy collaborative power supply, full-working-condition high-efficiency driving, intelligent energy efficiency control and precise energy recovery.

The invention relates to the technical field of central gas sources, solves the problems that an existing central gas source is poor in output gas quality, tedious in system connection, low in integration level and inconvenient to assemble, and discloses a central gas source for external load gas supply, which comprises a pneumatic block, a compressor assembly, an ECU controller assembly and a dryer assembly. The compressor assembly is installed on the side face of the pneumatic block. The pneumatic block is of an integrally-formed structure, a switching valve set, an air valve set, an air inlet one-way valve, an air filter, a power limiting valve and a sensor assembly are integrated in the pneumatic block, and a valve seat for air inlet and exhaust and an air pipe connector are arranged in front of the pneumatic block. The ECU controller assembly is located on the rear end face of the pneumatic block and is parallel to the motor. The dryer assembly is located on the lower end face of the pneumatic block. And an external load inflation valve is also arranged in the pneumatic block. According to the invention, the integration level of the system is improved, external pipelines are reduced, the system structure is simplified, the installation and maintenance are more convenient, and the fault occurrence rate is reduced.

This utility model relates to the field of food processing equipment manufacturing technology, and in particular to a composite motion drive mechanism for a gluten roll winding device, which consists of a torque output unit and a drag force output unit. The winding assembly performs circumferential rotation under the drive of the torque output unit; the unloading cylinder, driven by the drag force output unit, completes axial reciprocating movement, causing the formed gluten to detach. The drag force output unit uses a transmission shaft as its power source, and through the cooperation of a cam mechanism, a multi-component transmission mechanism, a rocking component, and an elastic reset component, converts the power into the reciprocating rocking motion of the rocking component, thereby driving the unloading cylinder to move synchronously. Thus, on the one hand, the composite motion drive mechanism has a relatively simple design structure, and thanks to the operating characteristics of the cam mechanism, the unloading cylinder can achieve non-rigid unloading force application; on the other hand, by adjusting the contour curve of the cam mechanism and the parameters of the multi-component transmission mechanism, and with the assistance of the elastic reset component, the gluten roll winding device can adapt to various unloading requirements.

The utility model relates to the technical field of medical instruments, in particular to a neuroendoscopic abrasive drill with a water injection pipe fixing device, which comprises a handle component, an outer sleeve rod, an abrasive drill, a guide seat and a water injection joint, and the guide seat and the water injection joint are arranged at the front end of the outer sleeve rod. A fixing device is arranged on the outer sleeve rod and comprises a hoop fixedly arranged on the outer sleeve rod in a sleeving mode and a fixing assembly installed on the hoop. The fixing assembly comprises an outer shell, a fixed inner sleeve, a movable sleeve and a nut, the fixed inner sleeve is provided with a center channel for the water injection pipe to penetrate through, elastic grabbing clamps which are annularly and evenly distributed are arranged at one end of the fixed inner sleeve, the movable sleeve is slidably arranged on the fixed inner sleeve in a sleeving mode, and the nut is in threaded connection with the fixed inner sleeve. The nut is screwed to push the movable sleeve to axially move and extrude the elastic gripper, so that the elastic gripper is forced to radially contract, and the water injection pipe is firmly clamped. Adhesive tape is replaced by a mechanical buckle type structure, so that an external water injection pipe is quickly and reliably clamped and released, displacement or falling of a pipeline in an operation is avoided, and the flushing effect and the operation safety are guaranteed.

This application discloses a lidar, a control method, and related equipment, relating to the field of mobile robot control. The lidar includes: a laser emitting component disposed on a rotating body of the lidar, the laser emitting component being used to emit coded laser light, the coded laser light being used for ranging and communication; a photosensitive component disposed on the rotating body, the photosensitive component being used to receive reflected laser light to obtain ranging information, the reflected laser light being the laser light reflected from the coded laser light onto the measured object and then onto the lidar; and an optoelectronic component disposed on the substrate of the lidar, the optoelectronic component being used to receive the coded laser light to obtain communication information.

A kind of half-bridge electromagnetic oven circuit, including master unit U4, still including the drive circuit being connected with the master unit U4, the drive circuit is connected with IGBT1 tube and IGBT2 tube, the drive circuit receives the driving signal of the master unit U4, and IGBT1 tube and IGBT2 tube are driven alternately to make heat disc work, the present application adopts the half-bridge control scheme not applied to electromagnetic oven in market at present, compared with traditional scheme circuit, half-bridge scheme uses two-way IGBT to work alternately, avoids high back pressure problem, and failure rate is low, simultaneously, also makes half-bridge electromagnetic oven can with low power continuous output, provides better cooking experience.

This invention discloses a sensing spring adjustment mechanism for mask mounting, belonging to the field of semiconductor lithography equipment technology. It includes a mounting base, a rotating shaft rotatably mounted on the mounting base, and a detection lever fixedly connected to the rotating shaft. Double torsion springs are sleeved at both ends of the rotating shaft, with the middle connecting end of the double torsion spring abutting against the bottom of the mounting base. A translational limiting mechanism is provided at the bottom of the mounting base, cooperating with the connecting end of the double torsion spring to guide and radially limit the movement of the connecting end. This invention uses double torsion springs instead of the traditional single-sided spring structure, providing a more balanced and stable reset force for the detection lever, ensuring the consistency and accuracy of the detection lever's reset action. Simultaneously, the double-sided support structure significantly reduces the risk of large deformation of the spring due to external force interference, fundamentally avoiding the problem of the spring detaching from the preset mounting slot.

This utility model relates to the technical field of rail vehicle components and discloses a uniformly stressed rubber stack for rail vehicles, including a support base. A central metal sphere is fixedly installed inside the support base. A first rubber layer is fixedly installed on the outer side of the central metal sphere. A first supporting sphere is fixedly installed on the outer side of the first rubber layer. A second rubber layer is fixedly installed on the outer side of the first supporting sphere. A second supporting sphere is fixedly installed on the outer side of the second rubber layer. This uniformly stressed rubber stack for rail vehicles has a cylindrical support plate with a first and second inclined surface, reducing stress concentration. Through a multi-layer metal reinforcement structure design, local stress concentration is reduced, dynamic load transfer efficiency is improved, and the longitudinal and lateral stiffness of the rubber stack is increased, resulting in uniform stress distribution, extended service life, longer replacement cycles, lower failure rates, and reduced maintenance costs.

The utility model discloses a kind of folding lamps, including the main light module of long edge setting pivot, two sub-lamp modules being rotatedly connected with main light module by pivot, main light module and sub-lamp module internal assembly lamps and lanterns;Main light module internal assembly drive panel, drive panel connects power cable with the lamps and lanterns inside main light module;The side surface of main light module is provided with power transmission hole, and power transmission touch plate electrically connected to drive panel is arranged in power transmission hole;Sub-module side surface is provided with the power receiving foot connected with the lamps and lanterns inside it, and the power receiving foot is inserted into power transmission hole and contacts power transmission touch plate;Drive panel supplies power to main light module, and drive panel supplies power to sub-lamp module through power receiving foot and power transmission touch plate. Thus, through simple and convenient turning operation, sub-lamp module can be triggered to illuminate, obtain diversified lamp effect, realize flexible dimming, without needing to lay special drive control circuit, without needing to additionally add other lamps and lanterns, with low failure rate, hardware cost is effectively controlled, applicable to diversified scene.

The utility model relates to the technical field of positioning devices, in particular to a positioning device for machining a four-axis fuselage rod of an unmanned aerial vehicle, which comprises a movable clamp block, each fixing mechanism comprises a sliding chute, a fixing plate, a spring and a fixing groove, the fixing plates at the two ends of the movable clamp block are pressed to fit and push a protective cover, and when the fixing grooves correspond to the fixing plates, the protective cover is fixed. A fixing plate enters a fixing groove through the elastic force of a spring, reverse operation during mounting and dismounting of the protective cover is achieved, workers can quickly complete mounting and dismounting of the protective cover conveniently, when internal parts of the protective cover need to be maintained, the protective cover can be quickly dismounted, the operation convenience is improved, meanwhile, the protective cover can shield an adjusting screw, and the working efficiency is improved. According to the positioning device, impurities such as cuttings and cooling liquid generated in the machining process can be prevented from making contact with the adjusting screw, abrasion of the impurities to the screw is avoided, the probability of screw failure caused by invasion of the impurities is reduced, the service life of the adjusting screw is guaranteed, and then the stability of the whole positioning device is guaranteed.