60results about How to "Meet the positioning needs" patented technology

The utility model discloses a thermal printer, comprising a paper cabin used for accommodating a paper roll; the at least one limiting plate is arranged in the paper bin and can reciprocate in the axial direction of the paper bin; the locking mechanism is connected with the limiting plate and used for locking the limiting plate in the axial direction of the paper bin. The thermal printer has the advantages of being simple and reliable in limiting structure and convenient to use.

The utility model belongs to the field of paperboards, and particularly relates to a positioning tool for paperboard slotting, which comprises two mounting seats, two guide rods are fixedly mounted between the two mounting seats, two adjusting seats are sleeved on the two guide rods in a sliding manner, and positioning plates for paperboard positioning are fixedly mounted on the sides, close to each other, of the two adjusting seats; a first threaded hole is formed in the rear side of the adjusting seat, a locking screw is installed in the first threaded hole in a threaded mode and matched with the guide rods, a rotary knob is fixedly installed at the rear end of the locking screw, two fixing seats are fixedly installed on the two guide rods, and positioning seats are installed on the front sides of the fixing seats. A locking mechanism is arranged between the positioning seat and the fixing seat, an adjusting plate is installed on the top of the positioning seat, and an adjusting mechanism is arranged between the adjusting plate and the fixing seat. The paperboard positioning tool is reasonable in design, the purpose of positioning different paperboards can be achieved through adjustment and fixation of the positioning plate, the positioning base and the idler wheels, and therefore the applicability of the positioning tool can be improved.

This utility model discloses a lifting device switching mechanism, including a base, on which a front switching component, a rear switching component, and a lifting device guide component are disposed. The front switching component includes a rotatable positioning pin and a lever, the rotatable positioning pin being driven by a rotary drive motor. The rear switching component includes a left support block adjustment drive motor, a right support block adjustment drive motor, a switching positioning pin, and a slide rail. The slide rail is equipped with a lifting device descent detection switch and a switching component induction switch, the switching component induction switch being located at the switching positioning pin. The lifting device switching mechanism provided by this utility model can not only be used for automatic adjustment of the positioning pin and support block position of the vehicle body lifting device, but also has a simple structure, is easy to install and maintain, and can conveniently meet the positioning needs of different sized vehicle models.

The application belongs to the technical field of laser processing, and relates to a positioning jig and a laser processing device. The positioning jig provided by the application comprises a positioning assembly and a pushing assembly. The positioning assembly comprises a positioning piece, a plurality of positioning notches for positioning a workpiece are arranged on the positioning piece, the positioning piece is provided with a first positioning surface, a second positioning surface and a bearing surface, the first positioning surface and the second positioning surface are both perpendicular to the bearing surface, the first positioning surface and the second positioning surface intersect to form a triangular positioning notch, the bearing surface is used for supporting the workpiece, and the workpiece is convex to the bearing surface. The pushing assembly is used for pushing the workpiece in the positioning notch, so that the side wall of the workpiece abuts against the first positioning surface and the second positioning surface, and the positioning of the workpiece is realized. The laser processing device provided by the application comprises the above positioning jig. The positioning jig and the laser processing device provided by the application can be adapted to workpieces of various sizes, production cost is reduced, and production efficiency is improved.

The invention discloses a positioning system switching method and device, equipment and a medium, and relates to the technical field of automatic control, and the method comprises the steps: obtaining first navigation information, when the first navigation information does not meet a preset positioning requirement, obtaining a second positioning system attribute and a second positioning system configuration, and when the second positioning system attribute and the second positioning system configuration both meet the preset power-on requirement, sending a control instruction, starting the second positioning system, switching the navigation mode into a second navigation mode, and obtaining second navigation information. When GPS positioning is not accurate, other positioning systems are switched to ensure the positioning precision, improve the positioning reliability and meet the positioning requirements in different scenes.

The invention discloses a small horizontal twin-cylinder diesel engine, which relates to the technical field of diesel engines. The engine comprises an engine body, wherein two horizontal inline cylinders are arranged in parallel inside the engine body, each of the cylinders has a diameter of 90 mm and a stroke of 75 mm, and each of the cylinders has a compression ratio of 19:1. A crankshaft output end is arranged inside the engine body, and a low-pressure pump is installed on the engine body. The diesel engine of the invention adopts light materials, ensures a good power-to-weight ratio (0.173 KW / Kg), ensures that the whole machine is small in size and light in weight, and effectively meets the needs of the market. The advanced and precise electronic speed control system can easily realize the conversion of multiple application modes, and the superior engine control capability ensures that the speed fluctuation rate of the engine is controlled within 0.3%, realizes 0 speed regulation, ensures the voltage stability of the equipped generator set, can realize the unchanged voltage value under no-load and load conditions, and improves and facilitates the fault maintainability of the speed control system.

This utility model provides a pneumatic lifting device for electronic trays, including a tray positioning assembly, a drive assembly, and a handling robot. The tray positioning assembly inserts a central positioning cone into the center hole of the tray, and, in conjunction with a pressure plate, clamps the tray to achieve precise vertical positioning. The drive assembly uses a downward-pressing cylinder to drive the limit plate to rise and fall, with linear bearings ensuring stability. The handling robot uses a rotary cylinder, a gripper cylinder, and a synchronous belt mechanism to achieve 45-degree rotation and extend / retract the fork, completing the tray gripping and handling. This device has a compact structure, high positioning accuracy, and strong adaptability, significantly improving the efficiency and stability of automated production, and is suitable for various electronic trays.

The utility model discloses a spring wire clamping assembly which comprises a wire cylinder and a wire clamping piece, the wire clamping piece is arranged outside the wire cylinder, the wire clamping piece comprises an installation assembly, clamping assemblies are arranged on the outer wall of one side of the installation assembly, the clamping assemblies are divided into the first clamping assembly and the second clamping assembly, the first clamping assembly comprises a first installation base, and the second clamping assembly comprises a second installation base. The outer wall of one side of the first mounting base is in threaded connection with a first mounting pin rod, one end of the first mounting pin rod is sleeved with a first pressing plate, the outer wall of one side of the top of the first mounting base is in threaded connection with a limiting bolt, a pressure spring is mounted at the bottom end of the limiting bolt through a bolt, and the bottom end of the pressure spring makes contact with the first pressing plate. The clamping assembly is divided into the first clamping assembly and the second clamping assembly, the first clamping assembly and the second clamping assembly are both matched with bolts through springs, continuous adjustment of linear clamping force is achieved, the clamping assembly can be matched with molybdenum wires or copper wires of different diameters, compared with a traditional structure, the vibration resistance is high, the pre-tightening force is dynamically adjusted according to the diameter of an electrode wire, and the clamping assembly is convenient to use. And wire breakage or slipping is not easily caused.

The invention provides a vehicle positioning method and device, a vehicle and a storage medium, and relates to the technical field of automatic driving, and the method comprises the steps: obtaining environment information collected by each of a plurality of sensors on the vehicle; obtaining an actual driving track corresponding to each kind of environment information according to the various kinds of environment information; according to the preset map and various actual driving tracks, the positioning result of the vehicle is obtained, various sensors are arranged on the vehicle in a redundant mode, when the functions of part of the sensors are limited or damaged, other sensors can be continuously used for positioning, the positioning requirements in various scenes are met, and the reliability of vehicle positioning is improved.

The utility model discloses a mould side edge positioning assembly, and relates to the technical field of side edge positioning assemblies, the mould side edge positioning assembly comprises a processing table, a mould piece, a positioning assembly body, an assembly convenient to disassemble and assemble and an adjusting and moving assembly, the mould frame is installed at the top of the processing table, and the positioning assembly body is arranged at the top of the processing table; the assembly convenient to disassemble and assemble is arranged at the top of the machining table, and the adjusting and moving assembly is installed at the bottom of the positioning assembly body. The use position of the positioning assembly body is conveniently disassembled, assembled and adjusted by arranging the assembly convenient to disassemble and assemble to be matched with the adjusting moving assembly, and the problems that an existing positioning assembly is difficult to replace conveniently in use, disassembly and replacement are tedious, a mold needs to be replaced frequently in use, and cost is high are solved. Therefore, the problems that the positioning assembly cannot be quickly disassembled, assembled and adjusted according to use requirements, much inconvenience is brought to operation, and the practicability and the use effect of the positioning assembly are reduced are solved, and the effect of facilitating disassembly, assembly and adjustment is achieved.

The utility model relates to the field of joint machining tables, in particular to a hose joint machining table with a positioning structure. The technical problems that in the machining process of an existing machining table, joints are machined through a flaring tool, a cutting tool and other tools, due to the fact that the sizes of the joints needing to be machined are different, when the machined joints are limited, a positioning assembly cannot be matched with the joints, the positions of hose joints are likely to be unstable in the machining process, and the machining precision is affected are solved. The size of the hose connector is inaccurate, a machining hole position deviates from a specified requirement, machining elements are damaged, and machining quality is reduced. According to the technical scheme, the hose connector machining table with the positioning structure comprises a workbench, a clamping and discharging assembly, an adjusting and positioning assembly, a movable punching assembly and a sliding assembly; the telescopic rod is driven by the driving motor to stretch back and forth, the closed clamping plate is pushed to be opened in combination with the insertion rod on the inner wall of the fixing block, stretching and opening and closing of the clamping plate are accurately controlled, and it is ensured that the process of clamping the connector is controllable.

This invention relates to a center detection system and method for defocused lenses. The system comprises an optical system consisting of a light source module, a beam splitter, a lens holder, a first imaging module, and a second imaging module. The light source module, lens holder, beam splitter, and first imaging module are arranged sequentially along the direction of signal beam propagation, while the lens holder, beam splitter, and second imaging module are arranged sequentially along the direction of reflected beam propagation from the lens under test. Therefore, the light emitted by the light source module is transmitted through the lens under test and received by the first imaging module for Hartmann detection imaging of the lens. Simultaneously, the beam reflected by the lens under test is captured by the second imaging module and imaged to obtain a reflection information map. This system not only has the function of real-time identification of the optical center of the main lens and calculation of the lens refractive power parameters, but also imaging of the microstructure of the defocus area and markings printed on the lens surface, thereby realizing the function of identifying and marking the geometric center of the defocused lens microstructure.

The utility model discloses full-automatic production equipment for a touch screen exposure process. The full-automatic production equipment comprises a machine body and an auxiliary positioning device, according to the utility model, the auxiliary positioning devices, namely the adjusting frames arranged on the left side and the right side in the shell, are matched with the screw rod and the servo motor to realize the transverse movement adjustment of the moving plates, so that the flexible adjustment of the distance between the positioning strips arranged at the upper ends of the moving plates on the two sides can be realized, and the purposes of flexible adjustment and expansion of the positioning distance are achieved; the driving assembly and the positioning reinforcing assembly are arranged, that is, under reciprocating push and pull of the rotating plate and the connecting rod, racks on the two sides can be in meshing transmission with gears, so that the positioning strips on the two sides can quickly clamp and position the glass base material, and the glass base material can be quickly positioned through front-back guiding and conveying cooperation of the anti-sliding belts on the two sides; the flexible adjustment of the front and back positions can be assisted, so that the advantages that the glass substrate is efficiently centered, positioned and matched, and the exposure position deviation phenomenon is reduced are achieved.

The invention provides an unmanned aerial vehicle connector double-sliding-rail positioning device. The unmanned aerial vehicle connector double-sliding-rail positioning device comprises a fixed base and a connector positioning base. A plurality of first sliding rails are arranged at the top of the fixed base, a plurality of second sliding rails are arranged on the two opposite sides of the fixed base respectively, the bottom of the connector positioning base is in sliding fit with the first sliding rails, and side sliding plates are arranged on the two sides of the connector positioning base respectively and are in sliding fit with the second sliding rails. And the joint positioning seat can move to a positioning position and an avoiding position along the first sliding rail and the second sliding rail. Compared with the prior art, in the double-sliding-rail positioning device for the unmanned aerial vehicle connector, the connector positioning base can move to the positioning position so that the unmanned aerial vehicle connector can be positioned at the preset position, production and assembly can be conveniently conducted, the connector positioning base can further move to the avoiding position, and therefore the unmanned aerial vehicle connector can conveniently avoid an unmanned aerial vehicle after being assembled; the unmanned aerial vehicle can be conveniently hoisted and unloaded; the overall structure is simple, the reliability is high, and the positioning requirements of different types of unmanned aerial vehicle connectors can be met.

The utility model discloses an end plate processing positioning jig, which relates to the technical field of positioning jigs and comprises a base, a sucker plate is fixedly connected onto the base, and the edge of the sucker plate is provided with a clearance portion corresponding to a workpiece processing track. A floating positioning pin and a positioning clamping block are arranged on the two adjacent sides of the suction cup plate respectively, the floating positioning pin is driven by a driving mechanism to ascend and descend, the positioning clamping block is fixedly connected with the base, a movable clamping block is arranged on the side, away from the positioning clamping block, of the suction cup plate, and the movable clamping block and the positioning clamping block are matched to be used for clamping a workpiece. According to the end plate machining and positioning jig, occupied machine resources and manpower resources are reduced, and the labor intensity is lowered; cutter machining cannot be interfered, and jig damage is avoided; and multiple positioning structures are arranged for co-positioning, so that the positioning effect is good.

The invention discloses a feeding device for child toy car accessory machining, and belongs to the technical field of toy car accessory machining. The feeding device for child toy car accessory machining comprises a mounting frame, the top and the bottom of the mounting frame are each provided with an opening a, and the two ends of the mounting frame are symmetrically and movably provided with pushing assemblies; the pushing assembly comprises sliding seats which are symmetrically and movably arranged at the two ends of the mounting frame, clamping assemblies are movably arranged on the sides, close to each other, of the two corresponding sliding seats, a moving assembly connected with the clamping assemblies is connected between the two sliding seats, and a rotating assembly connected with the moving assembly is connected between the two sliding seats; the two clamping assemblies conduct clamping and centering positioning treatment on the two ends and the corresponding side walls of the workpiece to be machined in the mode that the two clamping assemblies get close to each other, shaft accessories of different specifications of child toy cars can be clamped conveniently, and the problem that when the shaft accessories of the child toy cars of different specifications are machined, a whole set of jig needs to be replaced is solved.

The utility model discloses a high -tension wire harness fixed bolster, including first support and second support, first support includes first upper ring and first lower ring, and first upper ring and first lower ring inlayed connection, second support includes second upper ring and second lower ring, and second upper ring and second lower ring inlayed connection, wherein, first lower ring and second lower ring inlayed connection, install simple, improved assembly efficiency.

A communication method and related apparatus are disclosed for stimulating a first device to transmit a positioning reference signal, thereby enabling positioning of the first device based on the positioning reference signal to meet positioning requirements of the first device. The method includes: the first device receiving first information from a network device, the first information being used to stimulate the first device to transmit the positioning reference signal; and the first device transmitting the positioning reference signal based on the first information.

The utility model discloses an automatic linear cutting positioning device for plastic mold processing, which belongs to the technical field of positioning processing and comprises four C-shaped supporting plates for supporting during automatic linear cutting of a plastic mold, positioning plates for positioning and fixing are arranged in inner cavities of the supporting plates, threaded channels are arranged at the top ends of the supporting plates, and the threaded channels are communicated with the supporting plates. The threaded channel is in threaded connection with a positioning threaded rod, and the positioning threaded rod is rotationally connected with the positioning plate through a bearing; a material receiving box is arranged below the two supporting plates, four transverse linear motors are installed at the top end of the material receiving box, moving parts of the transverse linear motors are connected with a forward and reverse motor through motor bases, output shafts of the forward and reverse motor are connected with a transverse supporting plate, the transverse supporting plate is connected with two first electric push rods, and moving parts of the two first electric push rods are jointly connected with a vertical supporting plate. According to the automatic linear cutting positioning device for plastic mold machining, different positioning requirements can be met, and air can be treated to a certain degree.

The utility model belongs to the technical field of flashlights, and particularly relates to a slide rail glare flashlight which comprises a flashlight body and a fixing device, the fixing device is connected with the flashlight body, the fixing device comprises a slide rail part, and the slide rail part is used for being connected with a slide way. The shape of the slide way is matched with the shape of the slide rail part, the slide way can be fixed on a bicycle handlebar or a riding cap, the flashlight body can be fixed by clamping the slide rail part on the slide way in a sliding mode, an operator does not need to hold the flashlight body by hand, and the two hands of the user can be liberated.

This utility model discloses a production and processing equipment for diamond mesh security screens, belonging to the field of screen processing technology. It includes a workbench with mounting grooves on both sides of its upper surface. Each mounting groove is rotatably connected to a threaded screw via bearings. Each threaded screw has a mounting seat threaded onto its surface. A clamping plate is fixedly connected to the upper end of each mounting seat. Each clamping plate has sliding grooves at both ends, and sliding rods are movably connected inside the sliding grooves. This utility model, by setting up clamping plates, ensures the window frame's stable position and precise positioning during processing, improving the equipment's versatility and practicality. By setting up positioning components, the device can flexibly meet the positioning needs of different corners of the security screen, achieving effective positioning of each corner of the security screen, ensuring the security screen remains stable during processing, and improving the overall quality and aesthetics of the product.

The utility model relates to the technical field of PE pipe processing, in particular to an anti-loosening clamping mechanism for PE pipe cutting, which comprises a backing plate base material, an air pressure adsorption assembly and a clamping assembly, an arc-shaped backing surface is arranged on the inner side of the backing plate base material, and the clamping assembly is arranged on one side of the upper end of the backing plate base material. The clamping assembly comprises a reinforcing plate, rotating rods, plastic sleeve plates, an external driving motor and a limiting seat, the two sides of the reinforcing plate are sleeved with the plastic sleeve plates, the rotating rods are arranged at the ends, close to the base material of the base plate, of the plastic sleeve plates, the external driving motor is installed on the outer walls of the rotating rods, and the limiting seat is arranged on the outer side of one end of each plastic sleeve plate. Air pressure adsorption assemblies are embedded in the two sides of the inner wall of the arc-shaped cushion face. The problems that in the prior art, when an existing PE pipe is cut, one end of the pipe is generally fixed through a triangular claw disc, but the fixing effect is poor, the PE pipe is prone to shaking in the cutting process, and adjustment is not convenient according to the cutting position of the pipe are solved.

This application belongs to the field of multi-source information fusion for object recognition, localization, and navigation technology design. Specifically, it relates to an environmental mapping method based on multi-source sensor information fusion, comprising: Step 1, receiving image information, inertial information, and point cloud information; Step 2, inputting the image information and inertial navigation information into a visual odometry system, performing ORB feature extraction and feature tracking on the image information, and combining it with the inertial navigation information for pose estimation; Step 3, inputting the inertial navigation information and point cloud information into a laser odometry system, performing distortion correction, feature extraction, and pose estimation on the point cloud information based on the inertial navigation information, and then performing BA (Body Alignment) joint with the pose estimation output by the visual odometry system; using the BA joint result as the initial pose, performing point cloud registration optimization on the current point cloud and the accumulated point cloud map; using the registered and optimized pose information, overlaying the current point cloud and the previously accumulated point cloud to construct a point cloud map.

The utility model discloses a positioning tool of a numerical control bending machine, which comprises a working table, a connecting plate is arranged on the right side of the bottom end of the working table, positioning holes are arranged on the front side and the rear side of the outer wall of the connecting plate, bolts are arranged in inner cavities of the positioning holes, a groove is arranged at the top end of the working table, a base is embedded in an inner cavity of the groove, and the base is connected with the working table. A first motor is connected to the right side of the bottom end of an inner cavity of the workbench through screws, and a first screw is installed at the output end of the left side of the first motor. The positioning tool of the numerical control bending machine is simple in structure and reasonable in design, an electric adjustment mode is adopted, compared with a traditional manual positioning block adjustment mode, electric adjustment can meet various positioning requirements only through one positioning block, cost is reduced, operation is easy and convenient, time and labor are saved, efficiency is high, stability is good, and the positioning tool is suitable for popularization and application. And the machining precision of the workpiece is guaranteed, using is convenient, practicability is high, and the using requirement on the existing market is met.

This utility model discloses an automatic feeding device for a flaw detector, belonging to the field of magnetic particle flaw detection. It includes a support frame with a conveyor chain plate on it for conveying forgings. A transfer robot is mounted on the support frame above the conveyor chain plate. A forging support frame is also mounted on the support frame, and a forging positioning seat is installed on the forging support frame. The transfer robot can transfer the forgings from the conveyor chain plate to the forging positioning seat. It also includes a flaw detector clamping device, which is mounted on the support frame along the conveyor chain plate's conveying direction and positioned behind the forging positioning seat. The transfer robot can transfer the forgings from the forging positioning seat to the flaw detector clamping device. This structure ensures the stability of forging positioning and the accuracy of flaw detection.

The utility model discloses a supporting device for optimizing a cylinder cover core assembly mould, which relates to the technical field of mould fixing auxiliary equipment and comprises a supporting bottom plate and a plurality of core assembly mould bearing seats. Fixing seats are fixedly arranged on the end face of the supporting bottom plate, a guide sliding rail is arranged between every two adjacent fixing seats, and each core assembly mould bearing seat is slidably connected to the corresponding guide sliding rail in a sleeving mode. Limiting devices are further arranged on the core assembly mould bearing seats close to the two ends of the guide sliding rail. Each limiting device comprises a connecting seat, a limiting rod and a limiting block. The connecting seat is fixedly arranged on the outer side of the core assembly mould bearing seat, the limiting rod is hinged to the connecting seat through a pin shaft, the limiting block is fixedly connected to the supporting bottom plate, and the limiting block is used for abutting against the limiting rod. Therefore, the supporting device is arranged, so that the movable core assembly mould bearing seat is temporarily fixed, the fixing effect is improved, and the rejection rate of castings is reduced.

The present application relates to a GNSS model adaptive optimization method for enhanced navigation scene perception in high-precision positioning, including obtaining GNSS observation data, extracting and calculating GNSS data features, constructing a time-series GNSS feature vector of GNSS data features through the SFFS algorithm; constructing an LSTM neural network with time memory function based on the GNSS feature vector; training the LSTM neural network in combination with GNSS observation data and scene labels preset for navigation scenes to obtain an LSTM model; inversely calculating the residuals of pseudorange and carrier phase; fitting the functional relationship between the residuals and preset influencing factors to construct GNSS random models for different classification scenarios; constructing threshold models for different classification scenarios based on preset different classification scenarios and GNSS observation data, the threshold model including carrier-to-noise ratio, satellite altitude angle and ratio value. The present application has the effect of improving the availability, accuracy and continuity of GNSS positioning services in complex scenarios to meet the GNSS positioning needs in dynamic and complex environments.

The invention discloses a vacuum furnace feeding and discharging structure and relates to the technical field of vacuum furnaces, the vacuum furnace feeding and discharging structure comprises a vacuum furnace body, positioning blocks and a cover plate, the positioning blocks are installed on the two sides of the top end of the vacuum furnace body, an air cylinder is arranged on the side wall of the vacuum furnace body, a push rod is installed at the output end of the air cylinder, and the cover plate is installed at the top end of the push rod; a sliding rail is installed at the top end in the cover plate, a moving block is arranged in the sliding rail, a connecting frame is installed at the bottom end of the moving block, a rotating shaft is installed on the inner wall of the connecting frame through a bearing, the outer wall of the rotating shaft is sleeved with a material frame, and a sliding groove is formed in one side of the material frame. An I-shaped extension plate is mounted on the side, away from the sliding groove, of the material frame, the device has the advantages that the moving block is driven by the positive and negative lead screws to move in the sliding rail, then the moving block drives the connecting frame to move towards the middle position, the material frame drives the I-shaped extension plate to move in the sliding groove, and therefore workpieces of different lengths and sizes can be placed on the material frame.

The utility model discloses a positioning device for processing cartons of different sizes, which comprises a supporting seat, the supporting seat is arranged on a base, a limiting mechanism is arranged on the supporting seat, the limiting mechanism comprises a fixed plate, the side surface of the fixed plate is connected with a movable block on the side surface of an abutting plate through a first telescopic rod, and the movable block is arranged on the base. A hydraulic cylinder is arranged above the base, a top plate is arranged at the top of the hydraulic cylinder, and a lifting plate is connected to the lower portion of the top plate through a second telescopic rod. The carton positioning device is scientific and reasonable in structural design, the positions of the abutting plates can be correspondingly adjusted, a carton is clamped and fixed from the outer side through the two abutting plates, and therefore the positioning requirements of cartons of different sizes can be met, operation is easy and convenient, the base and the supporting base can be rapidly connected and detached, and the carton positioning device is suitable for popularization and application. And therefore, the use cost is further reduced, and the supporting seat is convenient to disassemble and clean.

A bearing seat positioning mechanism comprises a positioning base with an L-shaped cross section, a centering seat, a pull rod, a limiting block, a pressing seat and a top seat, the centering seat comprises a positioning disc assembled in a bearing hole of a bearing seat, the pressing seat comprises a pressing rod and two connecting rods, and the top seat comprises a seat body and a supporting bolt in threaded fit with the top of the seat body. The horizontal plane of the positioning base is fixedly installed on a milling machine table, one end of the pull rod is fixed to the vertical plane of the positioning base, and the other end of the pull rod extends in the horizontal direction, penetrates through the circle center of the positioning disc and the limiting block and is in threaded fit with the locking nut and a base body of the top base to be supported on the milling machine table. And the pressing rod is tightly pressed on the side face of the top of the bearing seat, so that the bearing seat is positioned. The device is simple in structure and low in machining cost, the bearing seat can be rapidly, efficiently and stably positioned, it is guaranteed that the side face where the length and the thickness of the bearing assembly end of the bearing seat are located is horizontal, and the milling requirement is met.