47results about How to "Shorten assembly time" patented technology

The utility model provides a drag chain routing device of an elevator, which belongs to the technical field of elevators and comprises a support, a first side plate and an electric / pneumatic wire harness, the support comprises a transverse part, a vertical part arranged below the transverse part and a shaft part arranged on the vertical part, and a chain wheel and at least one drag chain wheel are sequentially and rotatably arranged on the shaft part along one end. The chain wheel and the drag chain wheel are fixed relative to the axial position of the shaft part, a chain is assembled on the chain wheel, a drag chain is arranged on the drag chain wheel, the drag chain is hollow, the electric / pneumatic wire harness is arranged in the drag chain, and the drag chain wheel rotates along with the chain wheel to enable the electric / pneumatic wire harness to move along with the drag chain; according to the utility model, extra bearings and other auxiliary parts required by a traditional wiring chuck are reduced, so that the total number of parts is reduced, the manufacturing process is simplified, the material cost and the processing cost are directly reduced, and meanwhile, the production and assembly time is reduced due to simpler assembly, so that the production cost is further reduced.

The invention discloses an integrated panel, and relates to the field of new energy automobiles, the integrated panel comprises an integrated panel, and an MSD maintenance switch plug, a low-voltage signal connector plug, a high-voltage positive electrode plug, a high-voltage negative electrode plug and a low-voltage signal connector socket are assembled on the integrated panel; the integrated panel is provided with an MSD maintenance switch plug, the MSD maintenance switch plug is plugged in the MSD maintenance switch plug, the integrated panel is provided with a high-voltage positive electrode plug socket and a high-voltage negative electrode plug socket, plastic package contact pins are arranged in the high-voltage positive electrode plug socket and the high-voltage negative electrode plug socket, O-shaped rings are assembled on O-shaped ring grooves of the plastic package contact pins, and the high-voltage positive electrode plug socket and the high-voltage negative electrode plug socket are connected with the MSD maintenance switch plug. The high-voltage anode plug is inserted into the high-voltage anode plug-in socket, the high-voltage cathode plug is inserted into the high-voltage cathode plug-in socket, the integrated panel, the MSD maintenance switch plug-in socket, the high-voltage anode plug-in socket, the high-voltage cathode plug-in socket, the plastic packaging contact pin and the O-shaped ring are integrally formed in an injection molding mode, and self-sealing of the integrated panel is achieved under the condition that the integrated panel is not assembled.

The utility model discloses a power handle which comprises an installation assembly and a driving mechanism, and an installation cavity is formed in the installation assembly. The driving mechanism comprises a driving assembly and a clamping assembly, the clamping assembly comprises a clamping body, a sleeve, a first elastic piece and an abutting piece, and the sleeve is arranged on the clamping body in a sleeving mode and can move relative to the clamping body in the axial direction of the sleeve; wherein the first elastic piece comprises a plurality of disc springs, the disc springs are stacked in the axial direction of the sleeve and arranged on the clamping body in a sleeving mode, the disc springs have a compression state generating elastic deformation and abut against the position between the sleeve and the driving assembly, and the abutting piece is arranged on the clamping body and located on the side, away from the first elastic piece, of the sleeve. The first elastic piece can push the sleeve to move to make contact with the abutting piece so that the abutting piece can move towards the interior of the clamping body in the radial direction of the sleeve. The clamping assembly solves the problems that the clamping stability of the clamping assembly is poor, and clamping failure is prone to occurring.

This utility model discloses a connector assembly, including: a female connector and a male connector. The female connector includes a female connector housing, a female connector power assembly, a coaxial cable, a shielded cable, and a female connector shielding terminal. The female connector shielding terminal is disposed on the female connector housing. The female connector housing includes a fixing part and a plugging part. The fixing part has a fixing cavity, and the plugging part has a first plugging cavity, which communicates with the fixing cavity. The female connector power assembly is installed in the fixing cavity. The male connector includes a male connector housing, an alloy base, a male connector power assembly, a shielding plate, and a male connector shielding terminal. The male connector housing includes a first plug part and a second plug part that are mutually penetrating. The male connector shielding terminal, the connector power assembly, and the shielding plate are installed on the alloy base, and the alloy base is inserted into the second plug part. During assembly, the first plug part is inserted into the first plugging cavity, the male connector power assembly is connected to the front end of the female connector power assembly, and the male connector shielding terminal is connected to the front end of the female connector shielding terminal. This connector assembly achieves stable signal transmission and a convenient and efficient assembly process.

This invention relates to a method for assembling and adjusting a holographic concave grating monochromator, belonging to the field of optical instrument assembly and adjustment technology. It solves the problems of existing monochromator assembly and adjustment methods being cumbersome, time-consuming, labor-intensive, or having high theoretical requirements and low efficiency. The method involves leveling the holographic concave grating monochromator and laser; recording the initial spot height of the laser; directing the laser perpendicularly to the entrance slit of the monochromator to the center of the grating; measuring and recording the heights of the 0th and ±1st order diffraction spots; plotting the trajectories of the multi-order spectral spots; adjusting the pitch and / or tilt angle of the grating according to the trajectory until the center of each diffraction spot is collinear with the initial spot height; rotating the grating to allow the 0th order light to exit from the exit slit; using a right-angle fixture to adjust the grating shaft lever to be perpendicular to the drive screw and locking it; placing an external light source at the entrance slit; observing the clarity of the spectral lines at the exit slit using a microscope; and adjusting the thickness of the shim at the exit slit to achieve precise conjugate matching between the entrance and exit slits. This invention is simple to operate, quick to assemble and adjust, and highly accurate.

The embodiment of the utility model discloses an assembling tool and a motor assembling tool. The assembling tool comprises a machine cage, a top plate and a positioning assembly. A containing cavity with an axial opening is defined by the machine cage, and the containing cavity is used for containing workpieces. The top plate is detachably connected to the axial opening so as to limit the degree of freedom of the workpiece in the axial direction; the positioning assembly at least comprises a pressing plate; the pressing plate is movably connected with the machine cage and can stretch into or be away from the containing cavity in the radial direction so as to limit the freedom degree of the workpiece in the circumferential direction and the radial direction. According to the assembling tool, the degree of freedom of the workpiece in the axial direction, the radial direction and the circumferential direction can be limited through the cooperation of the top plate and the positioning assembly, then the positioning stability of the workpiece is improved, meanwhile, the coaxiality requirement in the workpiece assembling process can be met through the cooperation of the top plate and the positioning assembly, and the ideal assembling precision is achieved.

The utility model relates to the technical field of intercooler processing equipment, especially relates to an indirect intercooler pipe belt combination handheld clamping jaw device, including briquetting, support and adjusting frame, briquetting is installed on the support, and the handle is connected on briquetting, the support is as main support, and its one end is connected with adjusting frame each other through shoulder hinge pin, and the other end of support is installed with the limit stop, and the handle is set on the limit stop, and the handle and briquetting are connected each other through spring, and the limit stop is connected with briquetting each other through hinge bolt, the clamping plate is installed on the left and right sides of support, and the rubber plate is installed on the outside of clamping plate, the utility model through briquetting, spring, handle and the collaborative structure design of limit stop, realized the clamping and loosening function of single -handed operation handheld clamping jaw device, and the operator can control the opening and closing of clamping jaw only by holding handle and handle with single hand, need not the other hand auxiliary, improved production efficiency, shortened the assembly rhythm of intercooler core.

The invention provides an executing mechanism and a surgical robot, and belongs to the technical field of medical instruments. The executing mechanism comprises a transmission box, a driving steel wire and an executing joint; the transmission box comprises a box body, a driving shaft and a transmission part; at least part of the transmission part is connected with the first end of the driving steel wire, the second end of the driving steel wire is connected with the executing joint, the driving steel wire drives the executing joint to move, and the transmission part drives the executing joint to move. A driving rope is wound around the driving shaft, the first part of the driving rope is connected with the first end of the transmission piece, the second part of the driving rope is connected with the second end of the transmission piece, and the driving shaft can drive the transmission piece to rotate through the driving rope. Through the combination of the driving rope and the transmission part, the stability and the accuracy of the transmission process are improved; due to the double-end connection design of the driving rope, the stable rotation of the transmission part is ensured; the design of the transmission part enables the connection between the transmission box and the execution joint to be simpler and more convenient, and reduces the assembly difficulty and time.

The utility model discloses a nuclear power workshop double-ring-shell prefabricated clamping fixture, and belongs to the technical field of nuclear power building construction. The clamping fixture comprises a clamping fixture body, the clamping fixture body comprises a cabin vertical clamping fixture support, an inner side clamping fixture frame and an outer side clamping fixture frame, the inner side clamping fixture frame and the outer side clamping fixture frame are correspondingly arranged on an inner ring and an outer ring of the cabin vertical clamping fixture support in the circumferential direction of the cabin vertical clamping fixture support, and a mounting groove is formed in the cabin vertical clamping fixture support; and one end part of the outer side jig frame is arranged in the mounting groove and is fixed through a fastener. According to the nuclear power workshop double-ring-shell prefabricated clamping fixture, an assembly type double-ring-shell type steel structure clamping fixture is formed, the positions of the installation grooves are optimized, and the clamping fixture is fixed through the fasteners, so that positioning installation of the clamping fixture is easier to achieve, installation is more time-saving and labor-saving, the whole installation period is obviously shortened, and the installation efficiency is improved. Heavy labor in the aspects of part arrangement and positioning during assembly is relieved, and the assembly time and the auxiliary action time are shortened.

The utility model discloses a kind of for infrared continuous zoom lens's assembly and adjustment system.The system includes mechanical adjustment module, detection module and control module;Mechanical adjustment module includes adjustment table and adjustment frame, adjustment table is used to adjust the light axis pitch of lens and deflection angle, adjustment frame is used to carry lens tooling, realize the position adjustment and continuous zoom of lens horizontal direction;Detection module is used to monitor lens spacing and light axis offset amount in real time, also for real-time calculation image point offset amount;Control module is used to carry out light axis calibration and focal length calibration by adjustment table and adjustment frame according to the detection result of detection module.The utility model integrates multi-dimensional precision adjustment, real-time error detection and automatic calibration function, can realize the high-precision assembly and adjustment of infrared continuous zoom lens light axis offset amount≤10μm, focal length positioning accuracy≤5μm, simultaneously shorten single assembly and adjustment time to within 1 hour.

This utility model discloses a stator assembly and a motor. The stator assembly includes: a mounting frame; a winding disposed on the mounting frame and having a connecting lead at one end, the connecting lead having an insulating layer on its surface; and an electrical connector disposed on the mounting frame and forming a limiting groove, the limiting groove being adapted to receive a portion of the connecting lead, the limiting groove having a piercing portion adapted to contact the insulating layer to pierce the insulating layer, thereby electrically connecting the electrical connector to the connecting lead. The stator assembly designed according to this utility model, by designing a limiting groove in the electrical connector to limit the movement of the connecting lead, and by designing a piercing portion in the limiting groove, allows the electrical connector to pierce the terminal during installation onto the mounting frame, thereby electrically connecting the connecting lead to the electrical connector. This reduces the assembly time between the connecting lead and the electrical connector, improving motor manufacturing efficiency.

The invention discloses a ship body integral manufacturing forming device and method, and belongs to the field of ship body forming manufacturing. The device comprises a power module, an electrode module, a conductive metal strip, a liquid injection module, an edge pressing module and a mold; the blank pressing module is pressed above the ship edge of the prefabricated workpiece, so that the prefabricated workpiece is fixedly pressed in the mold, the prefabricated workpiece is fixed between the blank pressing module and the mold, a closed space is formed between the blank pressing module and the opening end of the prefabricated workpiece, and after liquid is injected into the closed space, the prefabricated workpiece is equivalent to a flexible container; when the device is used for forming the prefabricated workpiece, the conductive metal strip explodes under the action of pulse current generated by the electrode module, shock waves are formed in liquid, the shock waves drive the metal workpiece to deform, and therefore the shape correction of the prefabricated workpiece is achieved. According to the device, the equipment and production cost can be reduced, the proficiency of workers can be reduced, the production efficiency and the product quality can be improved, and the device is suitable for rapid, accurate and low-cost forming and manufacturing of various ship bodies.

The utility model provides a vehicle door module assembly, a vehicle door and a vehicle, and relates to the technical field of vehicles, the vehicle door module assembly comprises a bottom plate, a first guide rail and a second guide rail, the first guide rail and the second guide rail are used for limiting the moving track of vehicle door glass, the second guide rail is fixedly connected to the bottom plate through a fastener. The vehicle door module assembly, the vehicle door and the vehicle meet the structure, the area, used for being connected with the first guide rail, on the bottom plate can be omitted, the area of the bottom plate is reduced, and therefore the consumption of fasteners and the assembly time can be reduced, and the assembly efficiency is improved.

The invention discloses an integrated two-dimensional optical fiber collimation array component and a processing technology thereof, and the integrated two-dimensional optical fiber collimation array component comprises a packaging housing; the two-dimensional coupling module is arranged in the packaging shell, a microlens array is arranged on the first side of the two-dimensional coupling module, and a blind hole array is arranged on the second side of the two-dimensional coupling module; the two-dimensional array plate is borne on the second side of the packaging shell, a through hole array corresponding to the blind hole array is arranged on the two-dimensional array plate, and positioning counter bores are formed in the outer side of the through hole array; and the optical fiber ribbon comprises a ribbon body and a plurality of optical fiber heads, the optical fiber heads penetrate through the through hole array and then are embedded and fixed in the blind hole array, and the front end of the ribbon body is embedded and fixed in the positioning counter bore. The microlens array is compatibly arranged on the two-dimensional coupling module, so that the assembly has an optical fiber collimation function, the processing technology is simplified, the processing cost is reduced, and the overall sealing performance of the device is better.

The invention relates to an order process merging workshop scheduling method and system based on operation level constraints. The method comprises the steps of obtaining production data; establishing a mixed integer programming scheduling model taking the minimization of the maximum completion time and the minimization of the assembly time as targets; order combination constraints, process combination constraints and operation level constraints are integrated in the mixed integer programming scheduling model; and an improved grey wolf optimization algorithm is established to solve the mixed integer programming scheduling model, an optimal scheduling scheme is output, the improved grey wolf optimization algorithm combines a double-layer coding scheme of three constraints, a mixed initialization population strategy and an improved hunting mechanism, and a variable neighborhood search and simulated annealing dynamic acceptance mechanism is integrated, so that the optimal scheduling scheme of the hybrid integer programming scheduling model is obtained. Global exploration and local development capabilities are enhanced, so that an optimal scheduling scheme is obtained; and finally outputting the dispatching Gantt chart and issuing and executing. The scheduling problem caused by a complex assembly relation and too long preparation time in multi-variety small-batch production is effectively solved, and the production period is remarkably shortened.

The utility model provides a kind of combined disc spring device's assembly structure, belong to disc spring assembly technical field, the assembly structure of this combined disc spring device, including disc spring body, compression sleeve ring and positioning pin, disc spring body is conical platform and is provided with central through-hole in center, the outer circumferential edge of disc spring body forms annular pressure surface downward, compression sleeve ring is circular ring structure and is sleeved in the outside of disc spring body, annular gap is formed between the inner circumferential surface of compression sleeve ring and the outer circumferential surface of disc spring body, positioning pin is arranged on the side wall of disc spring body, one end of positioning pin is fixed on disc spring body, the other end of positioning pin extends to the inside of compression sleeve ring and is abutted with the inner circumferential surface of compression sleeve ring, the upper end surface of compression sleeve ring is provided with annular boss, annular boss is evenly distributed with limit groove along the circumferential direction of compression sleeve ring, the extension end of positioning pin is inserted into limit groove, pre-compression space is formed between the lower end surface of disc spring body and the inner circumferential bottom surface of compression sleeve ring.

This utility model relates to the field of X-ray tube assembly and disassembly technology, and in particular to a X-ray tube assembly and disassembly fixture, comprising an assembly and disassembly fixture body and a X-ray tube body. The assembly and disassembly fixture body consists of upper and lower sets of crossbeams, a cathode connecting rod, an anode connecting rod, a support plate, and a fixing plate. The lower crossbeam has cathode connecting rods fixedly connected to both the left and right sides of its interior, and the upper crossbeam has anode connecting rods fixedly connected to both the left and right sides of its interior. By using nuts and replaceable cathode clamp disassembly fixtures, cathode sleeve disassembly fixtures, and anode clamp disassembly fixtures, the precise assembly and disassembly of the anode cover plate, cathode cover plate, and cathode sleeve body at both ends of the X-ray tube along the axial direction can be achieved. The operation is simple and requires no additional adjustment. The assembly and disassembly fixture body, when used in conjunction with a rotating fixture, can achieve 360° rotation of the X-ray tube body, ensuring accurate positioning and reducing human error.

The utility model provides a kind of off-road module, tire pressure monitoring receiver subpackaging positioning device, including first subpackaging platform and second subpackaging platform;First subpackaging platform is provided with off-road module support limiting block;Second subpackaging platform is provided with vice instrument panel support limiting block;Off-road module support limiting block and vice instrument panel support limiting block are respectively used to constrain the displacement of off-road module support and vice instrument panel support after off-road module support and vice instrument panel support are positioned in X, Y direction, first subpackaging platform and second subpackaging platform are respectively installed in corresponding pedestal A and pedestal B, pedestal A and pedestal B are metal flat plate structure, surface is equipped with antiskid processing layer, this subpackaging positioning device is positioned groove by the appearance of spare part to be assembled and the force condition of support in subpackaging process Subpackaging platform custom limiting block, to ensure that a processing person can complete the sequential assembly of four different spare parts in short time, shorten subpackaging working hours.

The utility model discloses an integrated ball screw servo motor, which comprises a ball screw shaft, a ball nut, an oil seal, a shell, a bearing, a stator iron core, a rotor iron core, a rear end cover, an adjusting nut, an encoder, a magnet, a locking nut, a hollow shaft and an encoder rear cover, meanwhile, the hollow shaft is fixedly installed in the rotor iron core and sleeved with the stator iron core, the ball screw shaft is sleeved with the hollow shaft, the locking nut is arranged at the rear end of the hollow shaft to fix and lock the ball screw shaft, the lead screw and the motor rotor are fixedly installed and integrated through the structure, the coaxiality of the motor rotor and the lead screw is improved, various influences caused by eccentricity are reduced, and the service life of the motor is prolonged. And the screw rod is fixed through the hollow shaft and the locking nut, so that the screw rod can be quickly replaced, the screw rod can be conveniently disassembled and replaced, the efficiency is increased, the structural space for fixing the screw rod is saved, the structure is improved and simplified, the machining process and the assembly time are reduced, the operation stability is good, and the manufacturing cost is low.

This application relates to an auxiliary tooling for impeller welding, mainly in the technical field of machining auxiliary equipment. It includes a base detachably mounted on a machine tool. A positioning body for fixing the impeller is detachably mounted at the center of the top of the base. The positioning body includes a positioning pin and a fixing seat fixedly mounted on one end of the positioning pin. A fixing hole matching the locking bolt of the impeller is opened at the center of the other end of the positioning pin. The positioning pin is fixed at the center of the fixing seat. It also includes a fixing sleeve. A positioning platform is opened on the upper surface of the fixing seat. A snap-fit ​​ring matching the positioning platform is opened on the inner wall of the fixing sleeve. The fixing seat is detachably mounted on the base. This application solves the problem in the prior art where other auxiliary equipment is used to fix the impeller for welding. During the welding process, it is necessary to rotate the impeller or the welding machine tool to weld different positions of the impeller, which may cause impeller displacement and thus affect the welding quality.

The invention relates to the technical field of film preparation, in particular to a film coating chamber assembling method, a main body of a film coating chamber is fixedly mounted on a stand, and internal parts of the main body of the film coating chamber are mounted by entering the main body of the film coating chamber from the bottom of the stand; a lifting cart is arranged on one side of the stand, and the lifting cart is fixedly connected with the stand; releasing the fixed connection between the main body of the coating chamber and the stand, and moving the internally assembled main body of the coating chamber from the stand to the lifting cart; and the fixed connection between the lifting cart and the stand is relieved, and the main body of the coating chamber is transferred to the next station position. The method has the advantages that on the basis of ensuring the assembling quality and precision, the assembling efficiency of the coating chamber is effectively improved, and the assembling time is shortened; the safety of assembly operation is effectively improved, and dangerous accidents are avoided; the device is simple and reasonable in structure, high in flexibility, convenient to use and suitable for popularization.

The utility model relates to the field of carrier tape plate machines, and discloses a carrier tape straightening mechanism for a carrier tape plate machine, which comprises a bottom plate, a guide wheel is mounted on the left side of the top end of the bottom plate, a mounting plate I is fixedly connected to the right side of the top end of the bottom plate, and a driving component is mounted at the rear end of the mounting plate I; a collecting wheel is slidably connected to the outer side of the driving assembly, a second mounting plate is mounted in the middle of the top end of the bottom plate, a sliding block is slidably connected into the second mounting plate, a mounting base is fixedly connected to the front side of the sliding block, and a buffering assembly is fixedly connected to the bottom end in the mounting base. The top end of the buffering assembly is fixedly connected with a straightening wheel. According to the utility model, the adjusting hole is fixed with the clamping block and the fixing column, the horizontal height of the straightening wheel is adjusted, and compared with the fixed adjustment by using a threaded rod, the assembly process is simpler and more convenient, the assembly time and cost are reduced, the risk of looseness caused by long-time use is also avoided, and the tensioning force is ensured.

This utility model discloses a tungsten carbide boring tool, including a tool head and a quick-release mechanism. The quick-release mechanism includes an insertion rod and a quick-release sleeve. The insertion rod is fixed to the top of the tool head and inserted into the quick-release sleeve. A groove is formed on the outer wall of the insertion rod. A sliding rod is slidably provided on the outer wall of the quick-release sleeve. Multiple sets of sliding rods are provided, each with a locking block fixed at its bottom. A push block is fixedly provided at the top of each set of sliding rods. A limiting sleeve is slidably provided on the outer wall of the quick-release sleeve. By forming a groove on the outer wall of the insertion rod and cooperating with the sliding locking block on the outer wall of the quick-release sleeve, a quick locking function is achieved. At the same time, the use of polygonal positioning holes and positioning rods ensures accurate positioning and anti-rotation of the tool head installation. This structural design completely changes the traditional boring tool fixing method that relies on complex threaded connections or wedge-shaped grooves. The operator can complete the installation of the tool head with only simple insertion and rotation actions, without the need for special tools, which greatly reduces the assembly difficulty and time required.

The embodiment of the invention provides a calling method and device for standard part resources in industrial design software, computer equipment and a medium, and the method comprises the steps: receiving a matching condition input by a user on a design software platform, screening out a standard part three-dimensional model meeting the matching condition according to the matching condition, and storing the standard part three-dimensional model in the design software platform; taking the model as a candidate standard component three-dimensional model; selecting an adaptive standard component three-dimensional model from the candidate standard component three-dimensional models according to actual installation requirements as a target standard component three-dimensional model; recommending a matched standard component three-dimensional model according to the target standard component three-dimensional model; and calling the target standard component three-dimensional model and the matched standard component three-dimensional model for installation, and displaying attribute information on the target standard component three-dimensional model and the matched standard component three-dimensional model. According to the scheme, the design process is optimized through standard part full-life-cycle tracing and global consistency management, and the standard part calling and assembling time is shortened.

The utility model discloses a seat adjuster which is used for being installed on an automobile seat and comprises a sliding guide groove used for being connected with a backrest of the seat, a sliding plate is connected in the sliding guide groove in a sliding mode, and the sliding plate can slide in the sliding guide groove in the extending direction of the sliding guide groove. A lock catch is installed on the sliding plate and used for being connected with a seat of a seat. A bolt is slidably connected to the sliding plate, and a plurality of clamping grooves are formed in the side wall of one side, in the sliding direction, of the sliding guide groove; in the clamping state, the plug pin can extend into the clamping groove to be clamped with the clamping groove, and when the plug pin is clamped with the clamping groove, the sliding plate cannot slide along the guide groove; the sliding plate is further provided with a traction assembly, in the adjusting state, the traction assembly can pull the plug pin out of the clamping groove, at the moment, the sliding plate can slide relative to the sliding guide groove, and the relative position adjustment of the seat and the backrest is achieved. According to the utility model, the number of parts is reduced, the assembly time and the total part cost are reduced, and the weight of seat accessories is reduced.

The invention discloses a shell ring and shell plate longitudinal seam assembly tool and a using method. The technical problem that time and labor are consumed in the prior art is solved. The shell ring and shell plate longitudinal seam assembling tool comprises a telescopic assembly and two clamping assemblies. First connecting parts are arranged at the two ends of the telescopic assembly correspondingly. The clamping assembly comprises a clamp hook used for clamping the shell plate and a second connecting part used for being matched with the first connecting part, and the second connecting part is detachably matched with the first connecting part. The shell ring and shell plate longitudinal seam assembling tool has the advantages of being simple in structure, convenient to operate, high in adjusting precision and the like. By using the tool, the width of the longitudinal seam in the shell ring assembling operation can be quickly adjusted and reduced, and the assembling efficiency and quality are improved. Meanwhile, the problems of complexity and cost caused by a traditional horse plate fixing method are solved, an auxiliary structure does not need to be welded to the shell plate, the assembly cost and time are reduced, and repeated damage to the shell plate is avoided.

This invention belongs to the field of mechanical structure technology, and specifically relates to a method for controlling the assembly angle of a coaxial counter-rotating dual rotor shaft for a helicopter. The method analyzes the structural characteristics of the two rotor shafts and adds angle control markings during the machining and inspection of the rotor shafts and rotor shaft torque transmission gears. During rotor shaft assembly, the assembly angle between the rotor shaft and the rotor shaft torque transmission gear is calculated based on the angle control markings. Then, the assembly position is marked again on the rotor shaft torque transmission gear to ensure that the angles of the two rotor shafts meet the requirements after assembly.

The invention provides an assembling device and method for a secondary terminal outlet box cover of a voltage transformer, and belongs to the technical field of box cover assembling, the assembling device comprises a secondary terminal outlet box cover, the secondary terminal outlet box cover is connected with a secondary terminal outlet box through a shaft pin, a fastener is installed on the shaft pin, the fastener is a fastening nut, the shaft pin is of a stud structure, and the secondary terminal outlet box cover is connected with the secondary terminal outlet box through the shaft pin. A fixing part is installed on one side of the secondary terminal outlet box cover, a hinge arm is installed on the other side of the secondary terminal outlet box cover, a hinge seat is installed on one side of the secondary terminal outlet box, a long arc hole is formed in the hinge seat, the hinge seat is connected with the hinge arm through a shaft pin, and a fixing nut is installed on the other side of the secondary terminal outlet box cover and is in a butterfly shape. According to the invention, the processing error can be reduced, the influence on the sealing performance of the secondary terminal outlet box cover is reduced, the sealing problem caused by non-uniform pressure of the sealing element can be avoided when the box door is closed, and the sealing reliability and durability are improved.

The utility model provides a rotating assembly, a snow removing device and a snow sweeping robot. The rotating assembly is used for driving a snow throwing barrel of the snow removing device to rotate. The rotating assembly comprises an annular fixing piece and a rotating sleeve piece, and the rotating sleeve piece surrounds the annular fixing piece. Balls are embedded between the annular fixing piece and the rotating sleeve piece, and the rotating sleeve piece can rotate relative to the annular fixing piece. According to the rotating assembly, the balls are arranged between the annular fixing piece and the rotating sleeve piece, so that the use of a bearing is saved, the cost of the rotating assembly is reduced, meanwhile, assembling parts can be reduced, and the assembling steps, the assembling complexity and the assembling time of the rotating assembly can be reduced.

A high-sensitivity X-ray detection method and device based on laser ionized gas generates X-ray signals through laser ionized gas. Lasers and low-energy rays are filtered out using a metal filter membrane. Electrons are deflected through small holes and sintered NdFeB magnets to filter out fluorescent X-rays generated by electron collisions (at least weakened by one order of magnitude), thereby improving signal contrast. Finally, weak X-ray signals are detected by an X-ray silicon drift detector. At the same time, by changing laser parameters, gas types or the angle of the X-ray detector, the present invention can also be used for angular distribution detection of weak X-ray signals.