9547 results about "Ball screw" patented technology

A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob when an instrument shaft is engaged with the handle. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler and can provide certain motor drive profiles for predetermined positions of the stapler. The powered handle can include a manual return mechanism.

A robot mechanism adopts a dry cleaning method to clean the surface of live-line insulators without: using water and can perform cleaning and inspection of the surface of the live-line insulators while automatically moving along an insulator string. The robot mechanism includes a main unit having upper and lower wing frames connected with each other by a connecting bracket to surround the insulator string, a cleaning unit disposed between the upper and lower wing frames and including a base frame to perform dry cleaning with a rotational brush and a CM guide, a lift unit including a clamp and a ball-bearing screw to move the main unit up or down, and an inspection unit to electrically inspect the insulators; and a coupling unit to couple a pair of the main units to allow the pair of main units to move along a tension insulator string or a suspension insulator string.

A pipette station is described for use in the field of sample analysis. The pipette station increases the rate and ease with which a liquid may be manipulated into and out of sample carriers such as microwell plates. The pipette station includes shafts in the X, Y, and Z direction which possess ball screws which are integrated with motor shafts thus improving accuracy and eliminating the need for a coupling apparatus thereby reducing the space required for the pipette station. The pipette station may be interfaced with an automated laboratory system.

An automated system for delivery of seeds or other therapeutic or diagnostic capsules to internal organs of the patient's body for radiation brachytherapy includes a needling mechanism, a 2DOF robot, an ultrasound probe driver, a 5DOF passive platform, and an easy lock cart. The needling mechanism implants radioisotope seeds by its cannula and stylet driven by two moving stages pushed by DC motors with ball screw transmission. Force sensors are included for detecting insertion forces and bending force. In another embodiment, the needle is rotated for insertion into the patient and can also be used for tissue removal for biopsy. The two embodiments are usable together or separately.

The invention discloses a long-stroke two-dimensional nano worktable system with an angle compensation function. A six-degree-of-freedom micro table designed on the basis of a piezoelectric ceramic actuator and a soft hinge chain carries out comprehensive compensation of linear positioning and angle errors on a long-stroke two-dimensional nano worktable. A driving mode that a stepping motor and a ball screw are combined is adopted, so a long-stroke two-dimensional nano worktable has a large pitching angle, a deflection angle and roll angle errors, and positioning precision is of micron size. The six-degree-of-freedom micro table has nanoscale linear positioning precision and millisecond-level angle positioning precision. The long-stroke two-dimensional nano worktable and the six-degree-of-freedom micro table are combined to form the long-stroke two-dimensional nano worktable system. Under control of a closed-loop control system, the six-degree-of-freedom micro table carries out the comprehensive compensation of the linear positioning errors and the angle errors on the long-stroke two-dimensional nano worktable, so two-dimensional long-stroke nano positioning is achieved.

Spacers 26 each of which has a concave surface 27 complementary to the spherical surface of a ball 25 at each end thereof are disposed at areas between the adjacent balls 25, 25. A ball circulation mechanism comprises; a through hole 15 which extends in parallel to an axial line 4 of the ball nut 12 inside a thick wall part 14 of the ball nut 12; and adapters 23, 24 having open ends 23a, 24a provided with tongue portions 23c, 24c for scooping up or returning balls 25 between a ball screw groove 11 of a ball shaft 10 and a ball screw groove 13 of the ball nut 12, and the other open ends 23b, 24b being connected to be in communication with the through hole 15, and each adapter being fitted into recesses 16, 17 provided on both axial ends in the thick wall part 14 of the ball nut 12. Therefore, there is no need of upsizing a ball screw, and thus a compact ball screw which has a high load-carrying capacity and is suitable for a reciprocating movement can be provided.

The invention discloses an exoskeletal rehabilitation robot for upper limbs. The exoskeletal rehabilitation robot comprises a base, two mechanical arm assemblies and six motor driving components, wherein the base comprises a moving base, an electrical cabinet, an electric lifting post, a base platform, a motor mounting corner bracket, a base rotating motor, a coupling, a base main bearing block, a base and ball screw nut assembly, a base nut seat, a base shared secondary bearing block, a right support, a base linear guide rail assembly and a left support; the mechanical arm assembly comprises a mechanical shoulder girdle assembly, a mechanical shoulder joint assembly, a mechanical elbow joint assembly, a mechanical front arm assembly, a mechanical wrist joint assembly and a mechanical hand part assembly; each motor driving assembly comprises a motor and speed reducing component, a torque sensor component and a driving component which are respectively arranged on the same motor driving base frame. The exoskeletal rehabilitation robot can be worn on the upper limbs of the human body and can be used for assisting the upper limbs of the human body in moving in a three-dimensional space and performing rehabilitation training.

The invention discloses a device and a method for automatic helical milling of a hole. The device comprises a base, a spindle slide base, an outer eccentric sleeve, an inner eccentric sleeve, a torque motor, a circular grating, an electric spindle, a presser foot, an industrial camera, a linear grating, four laser distance sensors, a servo motor, a ball screw assembly, a synchronous belt and the like, wherein axes of inner and outer contours of the inner and outer eccentric sleeves have offsets; the inner eccentric sleeve is installed in the outer eccentric sleeve; and the axis of the inner contour of the outer eccentric sleeve and the axis of the outer contour of the inner eccentric sleeve are coincident. The device and the method have the advantages that the tool radial offset is realized through control of a relative rotation angle between the inner eccentric sleeve and the outer eccentric sleeve; in spindle feeding, a double-grating feedback technology is adopted so that dimple depth accuracy is guaranteed; and a preset hole position on a workpiece is detected by the industrial camera and a normal vector of the preset hole position is detected by the four laser distance sensors and the industrial camera and the four laser distance sensors cooperate with automatic numerically-controlled devices such as an industrial robot, a numerically-controlled machine tool and the like and thus high-precision and high-efficiency automatic hole milling is realized.

The invention provides a moon soil sampler, pertains to the field for detecting spatial resources, which comprises a casing, a power part in the casing, and a rod-changing section. The power part comprises a lifting motor, a drive gear, a ball screw, a screw nut, a connection disc, a rotation motor, a joint and a guideway that are sequentially connected. The rod-changing section comprises a gear box, a rotary shaft connected with the gear box, a 2-jaw clamp on the rotary shaft, an end gear ring positioner and a 1-jaw clamp that are arranged at the end of the rotary shaft and are connected with each other. On the 2-jaw clamp, a hollow drill rod with outer thread is provided. The invention is compact, light, with low energy consumption, can automatically sample in deep layer, can take all soil sample from the moon surface to the sampled depth, and can keep the sample basically as it is, and allows easy recovery.

PCT No. PCT / JP98 / 03390 Sec. 371 Date Mar. 23, 1999 Sec. 102(e) Date Mar. 23, 1999 PCT Filed Jul. 30, 1998 PCT Pub. No. WO99 / 06740 PCT Pub. Date Feb. 11, 1999A ball screw unit comprising a screw having a helical ball rolling groove on the outer peripheral surface thereof, a nut assembly having a load zone formed of a helical load rolling groove opposing to the ball rolling groove of the screw and a no-load zone forming a ball endless track by establishing communication between the starting end and the terminating end of the load zone, a number of balls rolling within the endless track of the nut assembly and a ball coupler comprised of coupling members for retaining the balls to rotate in their aligned state, wherein guide grooves for guiding the coupling members of the ball coupler are formed in the load zone of the ball endless track such that the coupling members of the ball coupler are moved by each of the balls in the no-load zone of the endless track while each of the balls is guided to move by the coupling members of the ball coupler in the no-load zone of the endless track, and guide sections for guiding the ball coupling members of the ball coupler along the progressing direction of the balls moving in the load zone are provided at least at both ends of the no-load zone near the load zone, respectively. Thus, according to the present invention, the delivery and reception of the balls are performed smoothly between the load zone and the no-load zone of the ball endless track to thereby achieve the smooth circulation of the balls.

In a rack assist type electric power steering apparatus which is provided with a ball screw mechanism having a rack shaft and a ball nut, the ball screw mechanism supporting the rack shaft in such a way that the rack shaft can be moved in the axial direction by rotation of the ball nut, a drive pulley rotating integrally with the shaft of an electric motor for power aid, a driven pulley rotating integrally with said ball nut and a belt looped around the drive pulley and the driven pulley, adjustment of the tension of the belt can be effected appropriately and easily.

The invention discloses a double-finger double-driving translation clamping type flexible grip and a control method. The double-finger double-driving translation clamping type flexible grip comprises double servo motor systems, double motor end synchronous pulleys, double positioning sliding guide rail systems, double ball screw systems, double screw synchronous pulleys, double finger paws, a U-shaped main rack of the grip and a main rack cover plate, wherein the coordinating fetching action of two paws is realized by the control on two servo motors. A fetching method is characterized in that the double motors are used as power, double fingers are respectively fixedly arranged on two screw guide rail synchronous switching modules, through the rotation of two synchronous toothed belts between the double motor end synchronous pulleys and the ends of the double screw end synchronous pulleys, the rotation of the motor is converted into linear motion by a screw, so that the double fingers are translated respectively along two positioning sliding guide rails, and the translation switching on and off of the double paws along double guide rail surfaces can be realized. Due to the fact that the device is used for independently driving the corresponding paws to move by the double motors, so that the double fingers can more flexibly move, and different fetching speeds can be set for the double fingers, and the position precision is high.

The invention relates to a method and a device for curing a fiber-reinforced resin-based composite material component by utilizing microwaves. The microwaves which are generated by a microwave source with linearly-adjustable power are guided into a resonant cavity, and the microwaves penetrate through and heat the composite material, so that the composite material can be quickly cured and formed. By adopting the advanced octagonal microwave-mode resonant cavity, the uniformity of an electromagnetic field inside the device can be realized; the interference of the reflection wave on the microwave source can be reduced by adopting an automatic impedance matching system, so that the optimal transmission of the microwave power can be realized. A vacuum pipe connector and a temperature sensor are arranged on the inner side wall of the octagonal multi-mode resonant cavity, a glass worktable is arranged inside the resonant cavity, and the rotation of a ball screw is controlled through a stepper motor to control the back-forth movement of the worktable. A choking groove is adopted to prevent the leakage of the microwave. By adopting the method and the device, the problems of the traditional autoclave forming method that the time for manufacturing the fiber-reinforced composite material is long, the energy consumption is high and the heat is non-uniform can be solved, the curing time can be saved, and the quality and performance of the composite material component can be improved.

A handle assembly for a surgical stapler can comprise a rotatable actuation shaft. The actuation shaft can have a first rotational orientation in which it can actuate a jaw assembly in a repeatable open and close mode, a second rotational orientation in which it can actuate a jaw assembly in a staple firing mode, and a third rotational orientation in which it can actuate a jaw assembly in a reversing mode. The handle assembly can include an articulation mechanism including a ball screw to selectively articulate the jaw assembly relative to an elongate shaft.

An electrically powered steering device comprises a ball screw mechanism for transmitting a steering force from a steering wheel to steerable vehicle wheels. The ball screw mechanism includes a rotary nut 11 having a nut body 11a in which a circulating passage 15 is formed so as to extend axially thereof, and end caps 14a and 14b secured respectively to opposite ends of the nut body 11a. Each of the end caps 14a and 14b has defined therein respective guideways 17a and 17b for balls 13 that communicate opposite ends of the circulating tunnel 14 with a ball rolling passage 12. The end caps 14a and 14b and the nut body 11a are made of a sintered alloy. The nut body 11a has an outer periphery of one end thereof that is axially progressively reduced in diameter to define a tapered surface.

The invention relates to a robot driving device, comprising a planar intraframe driving device and a mechanical arm driving device, wherein the planar intraframe driving device comprises an up-down lifting driving device and a left-right horizontal driving device. The left-right horizontal driving device drives a spraying robot to horizontally move right and left with a linear module sliding block by virtue of a servo motor, the up-down lifting driving device drives the left-right horizontal driving device to do lifting motion up and down with a ball screw by virtue of the servo motor; the mechanical arm driving device comprises an intermediate rotating driving mechanism, a telescopic driving mechanism and a swinging driving mechanism at the front end, the intermediate rotating driving mechanism drives a mechanical arm to rotate by virtue of the servo motor; the telescopic driving mechanism drives the mechanical arm to do telescopic motion by virtue of the servo motor; and the swinging driving mechanism at the front end drives a spray gun to swing and rotate around by virtue of the servo motor and a reducer.

In a vehicle, having a fixed supporting structure and a load movable relative thereto, a jam tolerant actuating system, a method for controlling this system including: Locating a physical coupling / decoupling mechanism between the load and an actuator assembly as close a practicable to the load; constructing the coupling / uncoupling mechanism to be reversible, and hence testable; and controlling the connection / disconnection via decision making electronics which will detect any system failure by monitoring, at a minimum: actuator main motor load and speed, and actuator output load. Also set forth are specific embodiments of pivotable rotary geared actuators as well as linear ball screw type actuators embodying the coupling / uncoupling mechanisms of this invention.

The invention discloses a five-axis multifunctional manipulator, which comprises a base, an X-axis movable plate, a Y-axis movable plate, a rotary disc, a rising rack and a rising movement rack, wherein a movable joint is connected onto the rising movement rack; a flange plate for placing a workpiece is arranged on the movable joint. According to the five-axis multifunctional manipulator, through the combination of a rolling ball screw, a linear guideway and a servo gear motor, a heavy disc workpiece can be accurately adjusted and located in three axes directions of an X axis, a Y axis and an XY plane, and can be moved in a straight line in a Z-axis direction and be swung in a Z direction, so that the five-axis movement of the manipulator is realized, the free movement of the workpiece in various directions in a space is realized through a guide mechanism, the loading capacity is strong, the moving precision is high, the moving stroke is large, the problem of eccentricity when the manipulator is in a loading state can be solved, and the five-axis multifunctional manipulator can meet the requirements on catching disc workpieces with different sizes, has favorable expansibility and is wide in range of applicable workpiece sizes.

The invention discloses a real-time control device and a real-time control method for a motion direction of an electromagnetic energy-regeneration semi-active suspension of a vehicle. A bi-directional controllable double ratchet mechanism composed of a first ratchet mechanism and a second ratchet mechanism which are jointly arranged on an input shaft of an energy-regeneration motor rotor is arranged between an energy-regeneration motor and a nut-ball screw mechanism. The first ratchet mechanism and the second ratchet mechanism respectively comprise a ratchet, a pawl, a pawl rotating shaft, a tensioning spring and an electromagnet. The electromagnets are electrically connected with a control unit, and the rotating directions of the two ratchets combined with the pawls are opposite. When the control unit inputs control signals to a first electromagnet and a second electromagnet of the first ratchet mechanism and the second ratchet mechanism, the input shaft of the energy-regeneration motor rotor can only rotate anticlockwise or clockwise, and the suspension can only be stretched or compressed. When the control unit does not input control signals to the first electromagnet or the second electromagnet, the suspension can only be stretched and compressed. When the vehicle is subjected to a large inertial force, by real-time control of the motion direction of the related suspension, pitching and side tipping of the vehicle are reduced, and the running safety of the vehicle is improved.

A planter system includes an adjustable height and angular orientation planter and an optionally adjustable irrigation system for controllably supplying water to the planter and / or surrounding terrain. The planter is configured to controllably travel up and down a vertical support, such as a section of a planter pole or other suitable vertical support structure, from a highest to a lowest position using a pulley and winch, block and tackle, rotating shaft, continuous pulley driven belt, continuous sprocket driven chain, lead screw, ball screw, a ballast, hydraulics, pneumatics, spring or other lifting subsystem. The irrigation system may be configured to supply water to the planter and or to the surrounding terrain. The planter is carried along the pole, allowing it to be controllably rotated at any height along the travel.

The invention discloses a suspended line walking robot which comprises a walking part and a suspending cabin, wherein the walking part consists of two trunks and three driving wheel claws; the two trunks form double parallelogram structures; the three driving wheel claws are guaranteed to face toward the same direction; five motors on the trunks drive the trunks to longitudinally swing, transversely swing and stretch to ensure that each obstacle detouring driving wheel can realize three-freedom-degree translational upper and lower lines; each driving wheel claw comprises a driving wheel and a clamping device, and the motors drive the driving wheels to ensure that the robot moves on the line; each clamping device comprising a motor, a ball screw pair, a spring, a clamping wheel, and the like guarantees that enough friction force is maintained between the driving wheels and the lines; the suspending cabin and the walking part are connected through two steel belts; and two motors on the suspending cabin adjust own gravity center position relative to the trunks through a steel belt so as to guarantee the flexibility of the mechanism while crossing an obstacle. The invention guarantees that the line walking robot can cross various line obstacles including corner line towers, can climb a diagonal tensile line larger than 60 degrees, has high safety factor and can replace man power to realize autonomous line walking.

The invention discloses a high-speed screw and screw pair comprehensive examination test bed comprising a granite base, a floating guide rail and linear guide rails. The floating guide rail and the linear guide rails are arranged on the granite base parallelly. A linear guide rail holding plate is arranged on the linear guide rails, and the lower side of the linear guide rails is connected with a linear motor arranged on the granite base. A floating guide rail holding plate used for mounting a probe system is arranged on the floating guide rail and is connected with the linear guide rail holding plate through a connecting mechanism. By the aid of the test bed, a function of testing the features such as geometric accuracy, positioning accuracy, backlash, driving speed and acceleration, natural frequency, vibration mode, damping, and static and dynamic stiffness, friction torque and fatigue in the high-speed screw and screw pair and a function of testing stability in the high-speed screw and screw pair can be realized, and the rapid and accurate evaluation on most performance parameters of a precision ball screw can be given.

The invention discloses an all-round automatic transport vehicle that can realize the automated process of picking up goods and loading goods in a narrow space. The omnidirectional automatic transport vehicle includes an omnidirectional motion mechanism, a lifting mechanism, a telescopic mechanism and a control system; the omnidirectional motion mechanism is composed of four omnidirectional Mecanum wheels; the lifting mechanism is composed of a bevel gear mechanism, a ball screw pair and a scissor mechanism Composition; the telescopic mechanism consists of electric push rods, roller slides and connecting rod support structures. The control system drives the mecanum wheel to realize the forward and backward movement, left and right movement, diagonal movement and zero-radius turning of the transport vehicle; the movement of the bevel gear transmission mechanism makes the scissors move to realize the lifting and lowering of the platform; the electric push rod moves to make the platform extend and retract.

The invention discloses a test bed for testing friction torque property of double ball screws, which comprises a base, and first and second servo motors which are arranged on the base and controlled by a control system, wherein the first servo motor is used for driving a ball screw to be tested; the second servo motor is used for driving a reference ball screw; two sides of the reference ball screw are provided with a linear guide rail respectively, and the upper parts of the two linear guide rails are provided with a workbench; the workbench is fixed with a reference nut on the reference ball screw; the workbench is provided with a force measuring sensor and a nut sleeve which is arranged on a nut of the ball screw to be tested; and the nut sleeve is provided with a cantilever contacted with a detection end of the force measuring sensor. After the ball screw to be tested is connected with the first servo motor, the size of friction torque of a ball screw pair can be effectively measured by using a corresponding signal of the friction torque of the ball screw to be tested acquired by the force measuring sensor so as to improve the quality of a ball screw pair product and promote the dynamic performance of a numerical control machine.

The invention discloses a method for automatic detection of composite errors of a ball screw spiral raceway, which comprises the following steps of: firstly, carrying out sampling preparation; then, sampling the axial position and the radial position of each point on a normal section curve of the screw spiral raceway to be detected by using a grating ruler and an optical screen type displacement sensor; then, processing the sampling data, and acquiring the normal section error and the pitch diameter dimension error of the screw spiral raceway to be detected in the rotating angle position; and after rotating the screw to be detected by 360 degrees / n, repeating the processes for n-1 times to acquire normal section errors and pitch diameter dimension errors of the ball screw spiral raceway to be detected under different rotating angle degrees, and taking the maximum values of the normal section error and the pitch diameter dimension error on each circle of raceway under each rotating angle degree as an actual normal section error and an actual pitch diameter dimension error of a screw to be detected. The invention also discloses a device for automatic detection. The method and the device for automatic detection can be used for achieving the purpose of automatic detection of the composite errors of the ball screw spiral raceway, and have good effect and high precision.

The invention discloses equipment capable of automatically testing moisture of bituminous coal. The equipment comprises two main brackets, a bottom plate, a lower fiber plate, a hearth, an upper fiber plate, a turn plate, a rotating shaft, a secondary bracket, an elevating rack, a U-shaped rack, a motor rack, a rotating motor, two bearing brackets, a ball screw, a balance, a weighing lever, a guide block and a slide block, wherein the lower fiber plate is assembled on the bottom plate; the weighing lever is assembled on the balance. The equipment capable of automatically testing moisture of bituminous coal is high in automatic degree, high in work efficiency and convenient to operate.

Coaxial valves usually contain only one moving part. It has not been easy, then, to provide for electric motor actuation. Many actuators being proposed involve designs which lead to bulky packages. The key facing those improving coaxial valves is the provision of suitable linear actuation. The valve herein includes a valve housing with a flow channel therethrough. Arranged in the flow channel is a closing body. In alignment with the closing body is a ball screw actuator which includes a ball nut and a cylindrical screw. The ball nut surrounds a threaded portion of the cylindrical screw. The cylindrical screw is provided with a passageway therethrough through which fluid flows. The cylindrical screw is disposed in the flow channel to become a control tube adapted to move toward and away from the valve seat. To rotate the ball nut an actuating drive is employed driven by a stepper motor.

The invention relates to an intelligent mechanical arm of a punch press. In the invention, a horizontal movement mechanism of the mechanical arm is transmitted by adopting a stepper motor and a linear ball screw; a mechanical arm rolling-over mechanism is transmitted by adopting a stepper motor and a gear, connected by a rolling-over spindle and rolled over by a driving arm, and the driving arm is provided with the mechanical horizontal movement mechanism which rolls over together; the mechanical horizontal movement mechanism is transmitted by adopting a servo motor and a planetary reducer; an executing end rotating movement mechanism is transmitted by a stepper motor and a synchronizing wheel, an executing part is a vacuum sucking disc, and the executing end rotating movement mechanism is arranged on the arm of the horizontal movement mechanism; a vertical movement mechanism is transmitted by adopting a stepper motor, a pair of bevel gears, a ball screw and a screw nut sleeve; and the horizontal movement mechanism, the rolling movement mechanism and the executing end rotating movement mechanism are all arranged on the screw nut sleeve of the vertical movement mechanism. The invention adopts a servo system in the aspect of electrical control to ensure that the running speed of the machine is improved, electricity is saved, and the effects of energy saving and environmental protection are achieved.

The invention discloses a leveling method based on four-point support and an electromechanical automatic leveling system. In the leveling method, a symmetrical diagonal lifting and leveling strategy is adopted, and the leveling purpose is achieved mainly by regulating the levelness of the ligatures among supporting points on diagonal lines; and the leveling system comprises a central processor, a level sensor, a control keyboard, a display, four alternating-current servo drivers and four supporting legs; and each supporting leg comprises a motor, a speed reducer, a ball screw and a base. The invention is particularly suitable for large-medium-sized radar truck vehicle-mounted platforms, communication vehicles and various engineering vehicles for engineering machinery, the method has the advantages of high leveling efficiency, high leveling reliability and the like, and the leveling system has the advantages of high leveling precision, high intelligent degree, high speed, strong carrying capacity, good stability, high transmission efficiency, suitability for severe environments and the like.