2237 results about "Ball screw" patented technology

A jack assembly that has a base member having a handle assembly extending therefrom, a remote control positioned in the handle assembly, a handle base section of the handle assembly that comprises a battery coupler and a control unit, an electric motor coupled to the base member and providing a torque to a gear assembly, the gear assembly coupled to a ball screw, a carriage slidably coupled to the base member, the carriage having a lift nut coupled thereto, the ball screw threaded through the lift nut such that rotation of the ball screw moves the lift nut, and carriage, linearly along the base member, and a lifting arm pivotally coupled to the carriage on one end and pivotally coupled to a pivot arm at an intermediate location.

The invention relates to the technical field of intelligent control of injection molding machines, in particular to an injection molding machine closed-loop mold adjustment control system and method based on multi-sensor fusion and a self-adaptive algorithm, and the system comprises a sensing layer which adopts a multi-sensor fusion closed-loop feedback architecture and comprises a pressure sensing array, a displacement sensing unit and a temperature sensing array. The data acquisition module is used for synchronously acquiring mold clamping force, position and temperature data of a mold, constructing a three-dimensional error compensation model and realizing dynamic correction of the parallelism of the mold through space force field analysis; the execution layer comprises a servo motor, a belt wheel and a ball screw and is used for adjusting the position of the template; a double-closed-loop control module is arranged in the control layer, the double-closed-loop control module comprises outer ring mold clamping force control and inner ring position control, mold clamping force deviation serves as input of an outer ring, position correction is generated through a self-adaptive PID algorithm, the inner ring converts the position correction into a servo motor rotation angle instruction, and therefore precise control over the mold clamping force is achieved.

The invention relates to the field of robot additional shafts, in particular to an additional shaft servo motor type selection method for a robot, which comprises the following specific steps of: S1, determining a transmission system structure at a load end of an additional shaft motor; s2, determining a mechanical structure and motion characteristic parameters of the transmission system; s3, importing into a motor library; s4, performing calculation; s5, judging and checking; s6, model selection is completed; for three mainstream transmission systems of a gear rack, a ball screw and a belt at a load end of a robot additional shaft motor, calculation and accurate model selection are performed on parameters of the motor, and the dynamic response characteristic of the motor and the system compatibility of the model selection method are improved; the model selection tool can support a user to import and modify a motor database by himself / herself, and quickly and conveniently recommend an accurate model selection result from the motor database according to the rotation speed, torque, power and load inertia ratio judgment and check conditions of the motor, thereby improving the model selection efficiency of the servo motor and improving the user experience. And resource redundancy and manufacturing cost caused by a traditional empirical selection method are reduced.

The invention discloses a piston assembly of a motor brake and an assembling process of the piston assembly, and relates to the technical field of motor brakes. Comprising a caliper shell, a caliper body assembly is installed on one side of the caliper shell, a power transmission unit assembly is detachably installed on the caliper body assembly, a positioning pin is arranged on the caliper body assembly, and a positioning hole matched with the positioning pin is formed in the power transmission unit assembly; the caliper body assembly of the caliper comprises a main support, a second support and a third support, wherein the main support is detachably installed on a caliper shell; the sleeve is detachably mounted on the inner side of the main bracket; the nut is connected into the sleeve in a sliding manner; and the ball screw assembly is connected into the nut through a thread. According to the invention, through arrangement of structures such as the caliper body assembly, torque transmission, clamping force transmission and stress support of parts are carried out in a highly integrated manner, installation and signal transmission of a force sensor in a very narrow space are realized, and the performance is reliable.

The invention discloses a PIN wire steel plate lifting mechanism and a control method, and relates to a PIN wire steel plate lifting mechanism which comprises a lifting module, a grabbing and sucking module and a fixing frame. The lifting module is in linkage with a lifting driving assembly through a ball screw, and high-precision lifting is achieved. The grabbing and sucking module comprises array type vacuum suction cups, a pressure regulating valve set and an air cylinder, the stability is enhanced through a cross-shaped transverse beam frame and a cross-shaped longitudinal beam frame, and 360-degree posture adjustment is achieved by carrying a hollow platform rotating assembly. The fixing frame is connected with the sliding base, so that the mechanism moves along the linear track, and the steel plates are conveyed. The control module integrates a visual system and a laser displacement sensor, positions the position of the steel plate and a hole site in real time, scans a three-dimensional contour, detects whether the steel plate deforms on line based on a hole site and aperture comparison method, automatically triggers a sorting alarm when a detection result exceeds a threshold value, and adopts a graded pressure relief technology in a release process to ensure soft landing of the steel plate. According to the scheme, the stability of the lifting process of the PIN wire steel plate is improved, the comprehensive efficiency of a full-process automatic production line is improved, and the reject ratio of products is reduced.

The invention relates to the field of ball screw nut pair transmission power and efficiency testing, in particular to a ball screw nut pair transmission power and efficiency testing device and method. The ball screw nut pair transmission power and efficiency testing device comprises a loading screw driving device, a load loading device, a load transmitting device, a to-be-tested nut clamping device, a to-be-tested screw driving device, a torque measuring and transmitting device and a displacement measuring device. The loading lead screw driving device is connected with the load loading device; the load loading device is connected with the load transmission device; the load transmission device comprises a first spherical hinge type floating joint, a second spherical hinge type floating joint, a floating joint connector, a floating joint connecting seat and a pressure sensor; the pressure sensor is connected with the to-be-tested nut clamping device; the to-be-measured lead screw driving device is connected with a to-be-measured lead screw through the torque measuring and transmitting device, and the to-be-measured lead screw is matched with a to-be-measured nut; and the displacement measuring device is used for measuring the displacement of the to-be-measured nut clamping device.

The rubber stripping device comprises a horizontally-arranged machine base, a V-shaped block clamping assembly, a quick dismounting and mounting positioning cylinder assembly and a variable-diameter type centering column assembly are sequentially installed on the machine base, the V-shaped block clamping assembly is used for clamping and fixing the rubber pipe, and the V-shaped block clamping assembly is used for clamping and fixing the rubber pipe. The quick dismounting and mounting positioning cylinder assembly is used for carrying out primary diameter positioning on the rubber pipe, and the variable-diameter centering column assembly is used for carrying out inner diameter positioning on the rubber pipe; the automatic feeding device has the beneficial effects that the variable-diameter centering column assembly and the rapid dismounting and mounting positioning cylinder assembly are designed to conduct double step-by-step positioning on the rubber pipe, the positioning mode is more reasonable and efficient, the V-shaped block clamping assembly and the ball screw mechanism are designed to achieve automatic feeding of the rubber pipe, operation is more convenient and rapid, time and labor are saved, and the automation degree is higher; the variable-diameter centering column assembly can adapt to accurate positioning of rubber pipes of different models, equipment transformation is rapid and convenient, the rubber pipes of different models can be machined, and cost is saved.

The invention belongs to the technical field of welding equipment, and particularly relates to an intelligent high-speed laser welding device for a longitudinal welded pipe, which comprises a rack, a high-precision clamping mechanism, a multi-degree-of-freedom motion platform, a laser welding head and an intelligent control system. The clamping mechanism adopts hydraulic pressure to drive an arc-shaped clamping plate to realize self-adaptive centering and flexible clamping of the pipe fitting; an X-direction module of the motion platform adopts a servo motor to be matched with a synchronous belt (or a ball screw) for transmission, and a Y-direction module is driven by a hydraulic cylinder, so that precise track control of the laser welding head is jointly realized; the intelligent control system integrates visual tracking of welding seams, infrared monitoring of a molten pool and laser detection of deformation, and welding parameters and motion trails are dynamically adjusted by calculating a welding quality coefficient in real time and based on a threshold value and a residence criterion. According to the method, the problems of welding seam tracking lag, unstable molten pool state, thermal deformation compensation deficiency and the like in high-speed welding are solved, and self-adaptive optimization and full data tracing in the welding process are achieved.

The invention belongs to the field of machine manufacturing, and discloses a deep hole inner molded surface profiling boring direct-drive intelligent control cutter system which comprises a cutter assembly, a rotary drive assembly and a sensor assembly. A rotary driving shaft of the rotary driving assembly is connected with an axial gear of the right-angle bevel gear pair, the inner side of a radial gear is connected with a driving nut, and the base plate and the tool apron are connected through a ball screw, so that a blade on the tool apron is driven to achieve radial feeding. The sensor assembly comprises a force sensor, a temperature sensor and a vibration sensor, signals are collected in real time and fed back to the drive control circuit board to control the rotary drive assembly, and therefore the profiling boring precision of blade feeding is improved. Direct driving and intelligent sensing control are combined and embedded in the profiling adjusting type boring cutter, a cutter transmission chain is greatly reduced, the transmission rigidity, the control precision and the response speed are improved, and therefore the performance requirements of a deep hole complex inner profile for high precision, high quality, high efficiency and high cost performance are met.

The invention discloses a bridge electromagnetic inertial mass hybrid control damping system and an overall hybrid control method. The damping system comprises an inertial mass assembly, an electromagnetic assembly, a rigidity assembly and a corresponding parameter adjusting circuit. Wherein the ball screw system is used for converting linear translation into rotation, the inertial mass assembly is used for providing acceleration type inertial mass damping, the electromagnetic assembly is used for providing speed type electromagnetic damping, and the rigidity assembly is used for providing rigidity. In a normal operation stage, a parameter adjusting circuit is utilized, and the purpose of adjusting electromagnetic damping and rigidity values is achieved by changing circuit input, so that semi-active tuning is realized; under the action of an earthquake, circuit input is fixed, so that parameters of the damper are constant, and the anti-seismic robustness of the damper can be improved.

The invention relates to the technical field of ball screw pairs, and particularly discloses a ball screw pair which comprises a screw rod, a nut, balls and a reverser, the screw rod is provided with an external thread raceway, the nut is provided with an internal thread raceway, and the external thread raceway and the internal thread raceway are oppositely combined to form a closed raceway for the balls to roll. The reverser is provided with raceway grooves used for communicating the adjacent internal thread raceways, the normal section molded lines of the external thread raceways and the internal thread raceways are each in a double-arc shape, each double-arc shape is composed of two symmetrical arcs, and the curvature centers of the two symmetrical arcs are located on the two sides of the center line of the ball. And two-point angular contact can be formed between the ball and each threaded raceway. The parameter design method of the ball screw pair comprises the following steps: S1, determining design input conditions; s2, preliminarily determining core geometric parameters; s3, determining detailed geometric dimensions; and S4, checking the strength and the service life. According to the scheme, the problem that an existing ball screw pair is insufficient in axial bearing performance is solved.

The invention discloses a socket with safety protection. The socket comprises a multi-mode thermal sensing array, and a fusion array of a miniature infrared thermal imaging sensor array and a distributed fiber grating temperature sensor which are integrated at key points in the socket; according to the active locking mechanism based on the thermal deformation prediction model, a micro servo motor, a ball screw, a pre-tightening spring and a spring bolt form an electronic lock, a shape memory alloy wire is used for rapid and silent emergency unlocking, and the micro servo motor is used for high-precision conventional locking; the dynamic thermal safety boundary algorithm module is used for dynamically calculating the optimal temperature upper limit and the optimal power upper limit of each component in the current state according to factors such as a real-time temperature field, predicted thermal deformation, current charging power and historical charging data; the main controller is used for transmitting a large amount of real-time temperature field data. Through multi-mode sensing, predictive modeling and master-redundancy cooperative execution, thermal safety and mechanical reliability of the charging interface under extreme working conditions are guaranteed.

The utility model discloses a lifting type connection table which comprises a table body, a lifting mechanism and two connection assemblies arranged on the table body. Wherein one connection assembly is fixedly installed on the table body, the other connection assembly is hinged to the table body, the lifting mechanism is installed on the table body, and the output end of the lifting mechanism is connected with the connection assembly hinged to the table body and can drive the connection assembly to rotate with the hinge point as the center. According to the utility model, through the lifting mechanism and the lifting of one connection assembly, the connection requirements of different heights and angles are met; automatic lifting is achieved through an air cylinder or hydraulic cylinder driving mode, manual intervention is reduced, and the operation efficiency is improved. The distance adjusting assembly is adopted in the connection assembly, accurate adjustment is achieved in a ball screw motor mode, and the conveying requirements of different sizes are met.

The utility model is suitable for the technical field of deburring cutters, and provides an aluminum pipe inside and outside deburring cutter which comprises a supporting disc. The three first ball screws and the second ball screw rotate in the supporting disc, the second ball screw is located between the two first ball screws, and the three first ball screws are axially arranged in the supporting disc at equal intervals; the driven bevel gears are respectively fixed at one end of the ball screw I and one end of the ball screw II; the movable frame is fixed on a nut seat on the first ball screw through a screw; the rotating rod rotates on the inner side wall of the moving frame; through mutual cooperation of the rotating rod and the deburring cutter, on one hand, the cutter can be positioned on the inner side of the aluminum pipe with gears of different inner diameters, it is guaranteed that the deburring cutter is continuously attached to the inner side wall of the aluminum pipe, the aluminum pipe is prevented from being scratched during deburring, and on the other hand, it can be guaranteed that the cutter moves stably in the aluminum pipe, and uniform deburring of the inner side wall of the aluminum pipe is achieved.

A fracture reduction mechanism for minimally invasive pelvic fracture surgery, comprising a support assembly, a drive assembly, a self-rotating clamping assembly, and a healthy side fixation assembly, wherein the drive assembly comprises a synchronous rotation module (21), a first ball screw module (22), a second ball screw module (23), a third ball screw module (24), and an arc guide rail module (33); the mechanism forms a frame-like closed structure through connection with an operating table (1) via bedside rails (2) on both sides of the operating table (1), the support assembly and healthy side fixation assembly are slidably connected with the bedside rails (2). By manually adjusting the linear movement distances and fixed-axis rotation angles of the above mechanism, six degrees of freedom translation and rotation of the pelvic fracture block can be achieved. The mechanism features high rigidity and load-bearing capacity, good portability, simple assembly and operation, high motion precision, and its motion center is a virtual point in space, the position of which can be adjusted according to patient position and fracture type, providing convenience for surgery.

The invention discloses a jacket pressure-bearing equipment corrosion defect in-service detection device and detection method, the jacket pressure-bearing equipment corrosion defect in-service detection device comprises a transverse frame, first arc frames are fixedly mounted on two sides of the transverse frame, the middle ends of the first arc frames are movably connected with contact wheels through bearings, and the lower ends of the back surfaces of the first arc frames are movably connected with second arc frames through hinges. The first arc-shaped frame and the second arc-shaped frame form a hoop structure capable of being opened and closed, the positions of the supporting wheels are adjusted in cooperation with a second screw and a movable frame, jacket pressure-bearing equipment with different pipe diameters can be rapidly adapted, overall rapid installation and fixation are achieved, a servo motor is controlled through a PLC to drive a ball screw, and the clamping device is convenient to use. The detection probe is driven to move at a constant speed along the surface of equipment, so that the problem of detection signal fluctuation caused by non-uniform moving speed in traditional manual operation is avoided, the stability and reliability of detection data are ensured, and the defect detection precision is remarkably improved.

An electric powered steering assembly includes a housing with a cylindrical portion, an interior wall of the cylindrical portion defining a first and second grooves extending in an axial direction, the first and second grooves having inwardly tapered walls. A ball screw is disposed in the housing, extending in the axial direction, and defining a through hole extending in a radial direction having a first and second ends. A ball nut is disposed in the housing surrounding the ball screw and configured to rotate relative to the housing. A first anti-rotational pin is disposed in the first end of the through hole, a second anti-rotational pin is situated in the second end of the through hole, and a spring is disposed between the anti-rotational pins. The spring is configured to bias the first and second anti-rotational pins in a radially outward direction towards the first and the second groves respectively.

The invention discloses a pure electric servo bending machine electric cylinder, which relates to the technical field of bending machine driving parts, and comprises an electric cylinder body, a transmission assembly, an execution assembly, a lubricating assembly and an anti-rotation assembly, the transmission assembly is matched with a ball screw through a synchronous pulley, a conical screw nut sleeve and a ball screw nut to realize motion transmission; the execution assembly drives an electric cylinder piston to stretch; the lubricating assembly realizes self-circulation lubrication of lubricating oil; the anti-rotation assembly limits radial rotation of the piston through a piston anti-rotation cambered surface. Pure electric servo transmission is adopted, positioning is accurate, response is rapid, an external oil way is not needed, safety risks such as oil leakage are avoided, and maintenance is convenient and fast; stable operation of equipment is guaranteed through self-circulation lubrication, movement stability is improved through an anti-rotation structure, and a conical matching structure is convenient to disassemble and assemble and high in universality. The hydraulic oil cylinder effectively overcomes the defects of an existing hydraulic oil cylinder, is suitable for various high-precision bending machines, and has high practical value.

A high-precision leveling apparatus, comprising a leveling base plate (3), a driving assembly (8), and a transmission assembly (9). The driving assembly (8) is connected to the leveling base plate (3) by means of the transmission assembly (9), and adjusts the height of the leveling base plate (3). The driving assembly (8) comprises a rigid base (8-2), and a ball screw (8-5) arranged on the rigid base (8-2) along a first direction, wherein the ball screw (8-5) is movably provided with a rigid support piece (8-4), and on the basis of the ball screw (8-5) and the rigid support piece (8-4), the rotation stroke of the ball screw (8-5) is converted into displacement of the height of a support surface of the rigid support piece (8-4), thereby ensuring the accuracy of the rotation process of the ball screw (8-5). A return gap between the rigid support piece (8-4) and the ball screw (8-5) is eliminated by means of stretch assemblies (8-7), thereby ensuring the support stability after the rigid support piece (8-4) is in place, and ensuring the accuracy and controllability of the displacement of the rigid support piece (8-4). A plurality of displacement detection apparatuses (8-1, 8-8, 8-9) are used to accurately monitor the displacement of the rigid support piece (8-4). A mechanical transmission-type active leveling solution is used to ensure the stability and reliability after leveling, and various measures are also used to eliminate errors in the mechanical transmission process, thereby ensuring the adjustment accuracy of the leveling apparatus. Also disclosed are a high-precision leveling platform, and a leveling method.

The invention belongs to the technical field of low-frequency vibration control, and discloses a low-frequency low-damping tuned mass damping device which is mainly composed of a rigid support, a first sling, a rotating arm, a cable hole, a first arc guide groove, a second arc guide groove, a lock pin, a second sling, a first mass block, a spring, a second mass block and a damping element. The flexible suspension rotation replaces the bearing or ball screw support, so that the damping is obviously reduced; the long rotating arm is combined with the equivalent large-diameter arc guide groove, so that the low-frequency low-damping tuned mass damping device can achieve large vertical displacement at a small rotating angle, and damping is reduced. The low-frequency low-damping tuned mass damping device innovatively adopts double-mass-block configuration, so that static force borne by a spring is generated by mass difference, and static deformation of the spring is remarkably shortened. According to the method, low-frequency operation can be achieved under the condition that the space is limited, the low-damping characteristic is kept, it is guaranteed that the requirement for the optimal damping ratio is met, and therefore a new technical approach is provided for control over low-frequency vortex vibration of a large-span bridge.

The invention provides a high-performance integrated electric actuator, and belongs to the technical field of automatic control. The motor drives the ball screw assembly to rotate through the transmission mechanism. The ball screw assembly is fixedly connected with the piston rod; the piston and the piston rod are assembled and then arranged in the main body cylinder barrel to do linear reciprocating motion; a self-lubricating structure is arranged on the inner wall of the main body cylinder barrel; a piston rod is rigidly connected with a nut of the ball screw assembly, a rod body penetrates through a guide sleeve at the front end of the body, and the front end of the piston rod is connected with a transmission load through a socket. A guide sleeve made of a thermal compensation material is arranged at the guide part of the piston rod; the magnetic switch is fixed outside the main body through a mounting groove or a screw and is aligned with the magnetic ring on the piston rod; the magnetic ring is embedded into the piston rod; and the anti-vibration supporting ring and the wear-resistant ring are arranged at the supporting part of the ball screw assembly. Stepless and multi-point positioning in a range can be realized according to working requirements, and multi-point free positioning is ensured.

The ball screw pair comprises a nut and a ball return device installed on the nut, a nut raceway is arranged on the nut, a ball return raceway is arranged on the ball return device, and the ball return raceway is in butt joint with the nut raceway. The ball screw pair is characterized in that the gradually-changing raceways are arranged at the two ends, in butt joint with the ball return raceway, of the nut raceway, and the gradually-changing raceways are arranged at the two ends, in butt joint with the ball return raceway, of the nut raceway. One end of the gradual-change raceway is in butt joint with the nut raceway and has the same depth as the nut raceway, and the other end of the gradual-change raceway is in butt joint with the ball return raceway and has the same depth as the ball return raceway; the ball screw pair has the advantages that the balls are in smooth transition from the nut raceway to the ball return raceway through the gradually-changed raceway, so that the vibration noise during working of the ball screw pair is greatly reduced, and the service life is prolonged; and moreover, as the positions of the two ends of the gradually-changed raceway are accurately determined, when the ball screw pair works, the area (namely the area of the gradually-changed raceway), which is not subjected to loading force during working, of the ball is controlled within the minimum range, and normal operation of the ball screw pair is ensured.

The invention discloses a positioning racking system for coating a large-size optical element. The positioning racking system comprises a main body structure, a lifting mechanism, a rotary bearing platform, a movement mechanism and a safety protection mechanism. A main body structure adopts a rigid design of composite support of a tripod and a tailstock. The lifting mechanism drives double ball screws to move synchronously through a worm and gear speed reducer, and precise lifting of the bearing platform is achieved. The rotary bearing platform can freely rotate by 360 degrees and is provided with a balance weight groove to adjust the gravity center. And the movement mechanism realizes flexible movement and stable support of the system. The safety protection mechanism integrates inclination angle, overload and limiting detection. The problems that a large-size and high-surface-shape-precision optical element is difficult to mount and position and poor in operation safety in the coating process are solved, and auxiliary mounting and positioning of a tool are safely, conveniently and precisely completed outside a coating machine.

The invention discloses a damping-adjustable inerter shock absorber which comprises an inerter and a magneto-rheological shock absorber, the lower end of the inerter is connected with the upper end of the magneto-rheological shock absorber, the inerter comprises a ball screw (1) and a ball nut (2), and the magneto-rheological shock absorber comprises a base, an outer cylinder barrel (4), a piston (5) and a rotating barrel (6). The upper end of the rotating cylinder (6) is fixedly connected with the ball nut (2), the piston (5) and the outer cylinder barrel (4) are both fixedly arranged on the base, the lower end of the rotating cylinder (6) is connected with the outer cylinder barrel (4) in an inserted mode, the piston (5) is located in the rotating cylinder (6), and magnetorheological gel is filled among the outer cylinder barrel (4), the piston (5) and the rotating cylinder (6). The damper has the advantages of attenuating the vibration amplitude and accelerating the attenuation rate at the same time, and has a wide damping adjustable range.

The application discloses a double-safety-redundant tilting actuator of a tilt-rotor unmanned aerial vehicle, which comprises a ball screw mechanism and lug connections and trunnion connections installed on the ball screw mechanism; the lug connections are fixed on the wing ribs of a wing, and the trunnion connections are fixed on a nacelle; the ball screw mechanism is configured to drive the nacelle to rotate correspondingly synchronously with extension and retraction actions of the ball screw mechanism; wherein the ball screw mechanism comprises two-stage serial ball screws and two independent driving mechanisms; the two driving mechanisms are configured to independently control the two-stage serial ball screws to complete all extension and retraction actions, so that the operation of the aircraft is safer and more reliable; when any one-stage ball screw is damaged or stuck at a certain angle to cause the ball screw to be unable to retract, the other one-stage ball screw can still normally operate, the nacelle can still rotate within a certain angle, the function of aircraft landing and taxiing can be realized, and the aircraft can be safely landed.

An apparatus for a brake drum of a vehicle having a drum brake assembly with first and second brake shoes includes a motor with a pinion gear. A ball screw assembly has a nut for receiving torque from the pinion gear and a spindle threaded with the nut. The nut is aligned with the first brake shoe and the spindle is aligned with the second brake shoe. The motor is actuatable for rotating the nut to move the nut and the spindle away from one another for moving the brake shoes to apply braking force to the brake drum during a braking event. A bi-stable locking mechanism selectively locks the motor to prevent torque transfer from a back-driving ball screw assembly to the motor.

The utility model relates to the technical field of constructional engineering, and particularly discloses an assembly type component hoisting and positioning device which comprises a moving assembly, a lifting assembly and a positioning assembly. The lifting mechanism comprises a lifting assembly and an adjusting assembly which are mounted on the mounting box, and the adjusting assembly can drive the lifting assembly to rotate; by starting the driving piece, the output end of the driving piece can drive the two-way ball screw to rotate, so that the two sliding blocks are driven to stably move towards or away from each other along the thread track of the two-way ball screw, and the sliding blocks stably slide on the supporting frame through the T-shaped blocks, so that the two lifting hook bodies are pulled to synchronously move; the distance between the two lifting hook bodies can be conveniently adjusted according to the specific weight and shape of a lifted component, so that the lifting hook bodies can be uniformly stressed, the stable state of the component in the lifting process is effectively maintained, shaking is reduced to the maximum extent, and the lifting safety and stability are improved.

The invention belongs to the technical field of metal cutting machine tools, and discloses an intelligent lathe which is characterized in that a touch main screen is mounted on the front side of a spindle box, and a touch auxiliary screen is mounted on the front side of a carriage box; the carriage box is installed on the front face of the lathe bed through a Z-direction ball screw. A spindle is installed on the two side walls of the spindle box through a front support and a rear support respectively, the front support is mainly composed of a bidirectional thrust angular contact ball bearing and two rows of cylindrical roller bearings with taper holes in the inner walls, and the taper holes are matched with the outer conical face of one end of the spindle. Nuts A are arranged on the outer sides of the two rows of cylindrical roller bearings; nuts B are arranged on the inner sides of the two-way thrust angular contact ball bearings; the rear support is a double-row cylindrical roller bearing; the carriage box is provided with a large carriage, and the large carriage is provided with a small carriage through an X-direction ball screw; the small carriage is mounted on the large carriage through an X-direction linear guide rail; and the large carriage is arranged on the lathe bed through a Z-direction linear guide rail. According to the invention, the manufacturing process is simplified, the cost is reduced, the noise of a machine tool is reduced, oil leakage is avoided, and the device is easy to repair and use and moderate in price.

The utility model discloses an electric microscope, belongs to the technical field of biological microscopes, and solves the problems that the structural parameters of the existing electric microscope cannot be adjusted, an objective table shakes in the focusing motion process, and a slide is easy to crush. The device comprises a base and a supporting vertical plate, the other side of the supporting vertical plate is provided with an electric mechanism for controlling the collecting lens assembly and the objective table to ascend and descend, the electric mechanism comprises a main lifting motor, a guide rail II, a ball screw I and a sliding block assembly I, the output end of the main lifting motor is connected with the ball screw I, the sliding block assembly I is installed on the guide rail II in a sliding mode, and the sliding block assembly I is in threaded connection with the ball screw I; and the slide block assembly I is in threaded connection with a pressure adjusting screw. According to the electric microscope, the front-and-back and left-and-right moving range of the slide is enlarged, the risk that the slide is crashed or a mechanical structure is damaged by electric control is reduced, and the influence of shaking in the lifting process of the objective table is reduced.

The invention belongs to the technical field of durability test of ball screws, and relates to a test bench for durability test of EMB ball screws, which comprises a test bench, at least one test position arranged on the test bench and an operation bench, and an EMB ball screw is placed on the test position; one end of the test position is provided with a thrust load end, and the other end is provided with a torque test input end. The torque test input end comprises a torque test servo motor, a dynamic torque sensor, a bearing seat assembly and a quick-change driving rotating mechanism; an output shaft of the torque test servo motor is provided with a dynamic torque sensor so as to dynamically detect the rotating speed of the torque test servo motor; the method has the effects of long-time stable test and improvement of the test precision.