562 results about "Roller screw" patented technology

An electrical actuator comprises two or more electrical motors to drive a threaded screw ram. Each motor has an armature that drives a threaded roller screw that is engaged to the threaded screw ram. Each armature of each motor is independently engageable and/or dis-engageable with the ram. The motor armatures are engageable and disengageable by way of threaded roller screws, the ends of which are tapered to enable them to be lifted away from or lowered into engagement with the threaded ram.

The invention discloses an automated linear displacement sensor calibration device which mainly comprises a substrate, and dual linear guide rails, a grating ruler, a servo motor and a vertical lifting device which are fixed on the substrate; a roller screw rod is connected with the servo motor by a coupler; a horizontal regulation device, a universal clamp and a locking nut are clamped with one another and are connected with the vertical lifting device; a sliding laser reflection mirror support frame, a sliding laser interferoscope support frame and a sliding dual-frequency laser interferometer support frame are fixed on the linear guide rails; a fixed pull rod, a laser reflection mirror and a grating ruler reading sensor are fixed on the sliding reflection mirror support frame; a laser interferoscope is fixed on the sliding interferoscope support frame; a dual-frequency laser interferometer is fixed on the dual-frequency laser interferometer support frame. The calibration precision can be ensured by the arrangement of the laser calibration mechanism, manpower and time cost are greatly reduced, and the calibration work efficiency is enhanced.

The invention discloses a comprehensive performance test bench for a planetary roller screw. A driving assembly provides power for the planetary roller screw; a test assembly is used for mounting a planetary roller screw of a different model; a hydraulic loading assembly is adopted to carry out dynamic and static loading on a planetary roller screw nut, load borne by the planetary roller screw during actual work is simulated, and a force closed loop is adopted to ensure accuracy of the loading force. The test bench is provided with a torque sensor, an angle encoder, a circular magnetic grating, a grating ruler, a LVDT, and a force sensor. Measurement on torque, an angle, displacement and force is realized through the sensor. Through analyzing the test data, test on performance of the position precision, the speed, the acceleration, the transmission efficiency, the transmission clearance and the axial stiffness of the planetary roller screw of the different model in the load state can be completed. The test bench has the advantages of simple and flexible structure, thorough and accurate test performance parameters, high loading precision and strong test scalability.

An electric linear actuator is disposed to pitch a blade of a hingeless, swashplateless rotor in rotary motion. This actuator can be equipped with an electric motor advantageously made fault tolerant by winding the motor for at least 4, 5, 6, 8, or even 12 phases. Rotational motion of the electric motor is preferably converted to a translatory linear actuator output motion using a planetary roller screw coupling the rotation of the motor with pitch of the blade. The output link of the actuator can be advantageously coupled to the planetary roller screw using an internal spherical joint providing an isolated load path through the actuator. It is contemplated that a preferred rotorcraft having an electric blade pitch actuator might also be equipped with a controller that could provide the vehicle with individual blade control, in which the pitch of any rotor blade can be controlled independently of the others.

The invention discloses a triaxial rheological testing apparatus and a testing method of an electro-hydraulic servo rock; an axial loading system is used for pressurizing an under cylinder; a cylinder piston component is used for pushing a test piece in a pressure chamber device to move upwards; a balance piston component is used for bearing an axial force, and transmitting a signal to an axial pressure controlling system by an axial force sensor; a confining pressure loading system is used for pressurizing a cylinder which is arranged in the pressure chamber device; a confining pressure sensor is used for transmitting a signal to a confining pressure controlling system; the axial pressure controlling system and the confining pressure controlling system are used for controlling axial pressure and confining pressure to be constant for a long time in a process of a rheological test; in the process, creep deformation occurs on the test piece, so that instant fluctuations of the axial pressure and the confining pressure can be caused; the axial force sensor and the confining pressure sensor can transmit signals to the axial pressure controlling system and the confining pressure controlling system at any time, and systems can respectively send instructions to start a servo motor depending on fluctuations of feedback signals, so as to control a roller screw rod to move forwards or backwards by a servo means; a pressurizing cylinder piston rod is moved, and the axial pressure and the confining pressure which are outputted by the pressurizing cylinder are respectively regulated; the testing apparatus is high in controlling pressure stabilizing precision and is capable of automatically stabilizing pressure for a long time.

The invention relates to an automatic gouging machine for a battery diaphragm, which is characterized by comprising an unreeling mechanism, a paper feeding mechanism, a punching mechanism, a guide mechanism, a reeling mechanism and a PLC control system which are sequentially fastened on a large base plate according to the process order; the unreeling mechanism comprises an unreeling shaft and an unreeling bracket; the paper feeding mechanism comprises a suspended sliding type adjusting mechanism and a roller screw-in structure; the punching mechanism comprises a gas cylinder bracket mechanism and a die bracket mechanism which adopt the modular design; the guide mechanism mainly comprises a guide roller bracket and a guide roller; and the reeling mechanism mainly comprises a friction adjusting mechanism, a winding core, a speed reducing motor, a reeling bracket and a reeling shaft. The gouging machine can adapt to the production requirements of button battery diaphragm with a plurality of specifications, and has the characteristics of simple structure, high efficiency and low cost.

Portable electromechanical tool comprising a unit (2) enclosing a continuous current electric motor (23) powered by a storage battery (4), a mechanical reduction gear (25) driven by the output shaft of said motor, which activates a working head (3) by means of a device (40) for converting the rotary motion of the motor (23) into a longitudinal translation movement, which is transmitted to said working head (3). According to the invention, said converting device (40) comprises a planetary roller screw, said screw comprising a threaded part (41), which is driven in rotation by said reduction gear to transmit motion via planetary rollers (43) to a threaded nut (42) that drives a mobile part (5) of said working head (3) in translation.

The invention discloses an automatic cartridge clip type feeding device, and relates to an automatic feeding device. The automatic cartridge clip type feeding device comprises a machine seat (1), a rack (2), a storage tank (3), a servo motor (401), a coulter (402), a roller screw rod (501), a screw rod sliding block (503), a screw rod support seat (502), a sliding support (6) and a guide shaft (7), wherein the rack (2) is fixed on the machine seat (1); the servo motor (401) is installed inside the machine seat (1); the servo motor (401) is connected with the screw rod (501) through the coupler (402); the other end of the rod (501) is fixed on the top part of the rack (2) through the screw rod support seat (502); the sliding support (6) is fixedly connected with the screw rod sliding block (503); one end of the guide shaft (7) is fixed on the top part of the rack (2); the other end of the guide shaft (7) is fixed on the machine seat (1); and a guide mechanism (602) and support bars (601) which are matched with the guide shaft (7) are fixedly assembled on the sliding support (6). The automatic cartridge clip type feeding device can be used in match with various automatic assembling machines, automatic silk-screen machines and part machining machines, and compared with manual feeding, the automatic cartridge clip type feeding device increases the production efficiency for more than two times and reduces more than half of the manual operation.

The invention discloses an in-situ observation testing device for simulating a micro oil displacing interface. The in-situ observation testing device comprises a base, a runner test sample movement component, a runner test sample component, an oil displacing component, a microscope movement component, a microscope component and a control acquisition component, wherein the runner test sample movement component comprises a servo motor, a first roller screw rod and a first screw rod screw nut; the runner test sample component comprises a support platform, a temperature control device and a test sample group; the oil displacing component comprises a peristaltic pump, a displacement liquid reagent bottle, inlet pressure acquisition equipment, outlet pressure acquisition equipment, volume measuring equipment and a weighing balance; the microscope component comprises a microscope lens, a microscope support component and an image acquisition device; the control acquisition component is used for acquiring image data and for acquiring and analyzing pressure, volume and mass data, and for controlling the movement of the servo motor and the flow of the peristaltic pump. By adopting the in-situ observation testing device, the interaction of micro surfaces and interfaces among different displacement liquids, crude oil and runners in the crude oil exploration process can be simulated, and study on oil-displacement mechanisms can be promoted.

A hybrid accessory drive system having two operational modes, a mechanical mode and an electric mode. The accessory is typically a cooling fan. A continuously variable mechanical belt drive mechanism drives the accessory as one mode of operation. An electric motor along with a planetary roller screw mechanism which converts rotary motion to axial motion is used to change the sheave position and thus the drive ratio. Upon disengagement of the mechanical drive mode, the electric motor can be used to drive the accessory in a second mode.

A roller screw includes: a screw shaft 1 having an outer peripheral surface in which a spiral roller rolling groove 1a is formed; a nut member 2 having an inner peripheral surface in which a spiral loaded roller rolling groove 2a is formed so as to oppose to the roller rolling groove 1a; a return pipe 4 connecting one and another ends of a loaded roller rolling groove 2a of the nut member 2; and a plurality of rollers 6 disposed in the loaded roller rolling passage 3 and the return pipe 4. A spacer 31 is disposed between a pair of adjacent rollers 6, 6 so as to prevent the paired rollers 6, 6 from contacting each other. According to such roller screw, the rollers can be smoothly circulated without causing any skew.

The invention relates to testing platforms, in particular to a comprehensive performance testing platform for a planetary roller screw, and aims to solve the problem that currently a comprehensive performance testing platforms for the planetary roller screw does not exist in China. The comprehensive performance testing platform comprises a cast iron platform, an alternating-current servo motor, a planetary reducer, an elastic coupler, a torque sensor, a rotation encoder, a linear guide rail, a movable platform, three bearing columns, a pull pressure sensor and a hydraulic cylinder, wherein the alternating-current servo motor, the planetary reducer, the elastic coupler, the torque sensor, the rotation encoder, the movable platform, the pull pressure sensor and the hydraulic cylinder are sequentially arranged on the upper surface of the cast iron platform from left to right, the alternating-current servo motor is connected with the planetary reducer, and the planetary reducer is connected with the torque sensor through the elastic coupler. The comprehensive performance testing platform belongs to the field of mechanical performance testing.

A hemming press that includes a crown and a base plate separated by four corner posts. A press ram is slidably mounted on the posts between the crown and base plate. A first die is mounted to a lower surface of the press ram and a second die is mounted to an upper surface of the base plate. Workpieces to be hemmed are placed in the second die, and the press ram is moved from an upper home position to a lower hem position to perform the hemming process. Pre-hemming and final hemming steps are performed by one continuous stroke of the press ram. A pre-hem pressure is provided to the press ram by at least one electric servomotor and roller screw assembly, and a final hem pressure is provided to the press ram by at least one hydraulic actuator.

The invention belongs to the field of electric automobile gearboxes and relates to a multi-gear gearbox and a control method thereof. The gearbox comprises a shifting mechanism and an executing mechanism, wherein the shifting mechanism comprises a first shifting motor, a first roller screw rod, a first shifting block, a first shifting shaft, a first sensor, a first guide shoe, a first and second gear shifting yoke, a first shifting yoke shaft, a second shifting motor, a second roller screw rod, a second shifting block, a second shifting shaft, a second sensor, a second guide shoe, a third and fourth gear shifting yoke, and a second shifting yoke shaft. The electric shifting mechanism and the executing mechanism are adopted, and two sets of independent motors and roller screw rod mechanisms are respectively used for shifting executing action of first gear and second gear as well as third gear and fourth gear, and shift selecting operation in a conventional AMT gearbox is cancelled; the multi-gear gearbox disclosed by the invention has the advantages of being simple in structure, high in control accuracy, high in response speed, and convenient to disassemble, assemble and maintain. According to the method disclosed by the invention, shift selection and shifting are automatic shifting controlled by a TCU automatic gearbox control unit without being controlled manually.