1672 results about "Linear actuator" patented technology

A seating unit includes: a frame having a pair of arms, wherein each of the arms includes a cutaway portion in a lower rear area thereof, the cutaway portion configured to receive a tread and a riser of a riser arrangement; a backrest; a seat; a first footrest; a reclining mechanism; and a linear actuator. The reclining mechanism is connected between the backrest, seat, and first footrest, the reclining mechanism comprising a series of pivotally interconnected links and configured to move the seating unit between: (a) an upright position, in which the backrest is disposed at a first generally upright backrest angle relative to the seat, the seat is disposed at a first generally horizontal seat angle and at a first longitudinal position, and the first footrest is retracted below a forward portion of the seat; and (b) a fully reclined position, in which the backrest is disposed at a second backrest angle relative to horizontal that is shallower than the first backrest angle, the first footrest is extended in front of the seat, the seat has a second seat angle that is deeper relative to horizontal than the first seat angle, and the seat has a second longitudinal position that is rearward of the first longitudinal position. The reclining mechanism includes a footrest mechanism attached to the first footrest, the footrest mechanism configured to control relative movement of the first footrest relative to the seat. The linear actuator is attached to the reclining mechanism and the footrest linkage and configured to move the backrest, seat and first footrest between the upright and fully reclined positions. The linear actuator and the footrest linkage reside entirely below a front portion of the seat and in front of the cutaway portion of the arms.

A powered chair comprises a chair framework, which includes a pair of oppositely disposed armrests, a chair seat frame which is fixedly connected to the pair of armrests, a footrest, a backrest, a first linear actuator mounted upon the pair of armrests and operatively connected to the footrest, and a second linear actuator mounted upon the armrests and operatively connected to the backrest. When the first and second linear actuators are actuated, they can respectfully actuate or move the footrest and backrest, however, in view of the fact that the first and second linear actuators are not operatively connected to the chair seat frame, and in view of the additional fact that the chair seat frame is fixedly mounted upon the pair of armrests, the chair seat frame will remain stationary despite movements of the footrest and backrest, to any one of their multiple positions, as a result of the actuation of the first and second linear actuators.

A recliner chair, love seat, or sofa comprises a backrest, a seat, a footrest, and pairs of symmetrical, oppositely disposed linkage members for moving the backrest between upright and reclined positions, and for moving the footrest between retracted and extended positions. A protective cover is fixedly attached to the footrest such that opposite sides of forward portions of the pairs of symmetrical, oppositely disposed linkage members are covered so as to prevent parts of young children or pets from being caught within the forward portions of the pairs of symmetrical, oppositely disposed linkage members as the pairs of symmetrical, oppositely disposed linkage members are moving the footrest between its retracted and extended positions. In addition, a single linear actuator is utilized to move both the backrest between its upright and inclined positions, and to move the footrest between its retracted and extended positions.

An actuating mechanism for a powered furniture piece comprises a base, a seat rail operatively connected to the base, a back support bracket, a footrest mounting bracket, an ottoman drive link, a linear actuator, and a control link, such that when the linear actuator is extended to a first predetermined position, the footrest mounting bracket will be moved from a retracted position to an open position, the back support bracket will be maintained at an upright position, whereby the actuating mechanism will be disposed at a TV position, and when the linear actuator is extended to a second predetermined position, the back support bracket will be moved from the upright position to a reclined position whereby the actuating mechanism will be disposed at a fully RECLINED position.

The invention discloses a high dynamic response control method and system for a linear actuator of a humanoid robot, and the method comprises the steps: collecting the pressure and moment data of a contact point, carrying out the data preprocessing and signal calibration processing, and obtaining the calibration pressure and moment data; based on the calibrated pressure and torque data, performing high-frequency signal extraction to obtain dynamic change characteristics, and performing distribution diagram construction in combination with the pressure and torque data to obtain a pressure distribution diagram and a torque distribution diagram; performing data fusion processing according to the pressure distribution diagram and the torque distribution diagram, generating real-time contact area distribution, and performing dynamic prediction model construction based on the pressure and torque data to obtain a dynamic prediction model; according to the dynamic prediction model, actuator output force and joint angle adjustment amount are calculated, output torque and angle compensation amount are generated, torque distribution optimization and force feedback compensation are carried out, and an optimized final control signal is obtained. According to the method, high-dynamic response control of the controller can be realized.

A two-motor lift and recline system for a powered chair comprises a base, at least one footrest / ottoman support bracket for mounting and supporting a footrest or ottoman thereon, at least one seat rail for mounting and supporting a seat thereon, at least one backrest support bracket for mounting and supporting a backrest thereon, a first linear actuator mounted upon the base and operatively connected to the at least one footrest / ottoman support bracket for moving the at least one footrest / ottoman support bracket between extended and retracted positions, and a second linear actuator mounted upon the at least one seat rail and operatively connected to the at least one backrest support bracket for moving the at least one backrest support bracket between fully upright and fully reclined positions.

An electric linear actuator has a housing extending along a longitudinal axis. A spindle is provided in the housing and extends along the longitudinal axis. A rod is coaxially coupled to the spindle and extends from a proximal end located in the housing to a distal end located outside the housing. The rod is movable along the longitudinal axis in response to rotation of the spindle. A circuit board is located in the housing adjacent the proximal end of the rod. The circuit board includes a linear inductive sensor having a linear axis oriented parallel to the longitudinal axis. The linear inductive sensor senses an actual position of the proximal end of the rod.

A linear actuator system includes a linear actuator and an integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with two fluid drivers, each fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes the pump in a normal mode of operation in which the prime movers are independently driven and switches to a fail-safe mode of operation in which only one prime mover is operated.

A new and improved powered rocking lounger chair wherein the chair comprises a base assembly, a rocking assembly, a seat assembly, a backrest reclining assembly, a footrest assembly, a linkage assembly, at least one linear actuator for moving the seat assembly, the backrest reclining assembly, and the footrest assembly between a seating mode, a TV mode, and a reclining mode, and at least one limit stop interposed between the seat assembly and the base assembly such that when the chair is disposed in the seating mode, the chair is capable of undergoing rocking movements, whereas when the chair is disposed in one of the TV and reclining modes, the at least one limit stop will prevent the chair from undergoing rocking movements.

A positive drive differential assembly including a differential with an input pinion configured to operably engage with a drive shaft so as to permit the drive shaft to rotate the pinion. A bi-directional overrunning clutch assembly is configured to transmit torque between the pinion and two drive axle segments. A pinion disconnect assembly is provided for controlling transmission of rotation to the pinion and including a rotary coupler. A linear actuator is connected to the rotary coupler and configured to translate the rotary coupler between connected and disconnected positions.

An end effector for a picking robot, and a method of use, the end effector comprising: a body; a shaft slidably coupled to the body and extending along a longitudinal axis between a proximal end and a distal end, the shaft having a vacuum lumen extending therethrough along the longitudinal axis; a suction cup coupled to the distal end of the shaft such that an interior volume of the suction cup is in fluid communication with the vacuum lumen; a vacuum generator connected to the vacuum lumen at the proximal end of the shaft and configured to create suction therethrough; and a linear actuator configured to slide the shaft along the longitudinal axis between an extended position in which the suction cup is relatively farther from the body and a retracted position in which the suction cup is relatively closer to the body.

In one aspect the subject matter herein describes a cable tilt actuator for an aircraft propulsion unit. One embodiment comprises: a cable spool, fore and aft cable sections, a compression beam, a compression beam guide, and a linear actuator. As the linear actuator drives the compression beam, relative rotation is imposed between the compression beam and the spool. Described, in one aspect, is an embodiment configured to tilt an aircraft propulsion unit.

The invention relates to the technical field of zipper detection, and discloses zipper defect picture acquisition equipment, which comprises a lower rack, an upper rack is arranged on the upper side of the lower rack, an industrial computer is arranged on the right front side of the upper rack, and a control box is fixedly mounted on the front side of the lower rack. The zipper defect picture acquisition equipment is provided with a feeding arrangement rack, a feeding guide wheel mechanism, a tension adjusting mechanism and the like, the tension adjusting mechanism can tension and adjust a zipper strip to be detected, the feeding guide wheel mechanism guides in the zipper strip, the discharging guide wheel mechanism discharges the zipper strip, upper and lower industrial cameras can photograph and recognize the upper and lower surfaces of the passing zipper strip, and an annular illuminating lamp supplements light. A displacement conveying assembly, a camera shooting assembly and the like are arranged, a linear actuator drives a defective zipper to move to the inner side of the camera shooting assembly, upper and lower industrial cameras carry out shooting recognition learning, an industrial computer carries out deep learning training, finally, the zipper to be detected can be detected, defective items are detected and counted, the development period can be shortened, and the efficiency can be improved.

The utility model discloses a linear actuator which comprises a mounting seat, a motor, an output seat, a guide mechanism and an elastic mechanism, and the mounting seat comprises a base plate and a mounting plate which are fixedly connected; a stator of a motor is fixed to a mounting plate, an output base is located on one side, in the first linear direction, of a rotor of the motor, and the output base is connected with the rotor, so that the output base moves in the first linear direction along with the rotor under the driving of the stator; the guide mechanism is arranged between the mounting base and the output base and used for guiding the output base to move in the first linear direction, the elastic mechanism is arranged between the mounting base and the output base and arranged in the first linear direction, and the motor, the output base and the guide mechanism are arranged on the same side of the mounting plate. Meanwhile, the maximum distance from the motor to the base plate is larger than the maximum distance from the guide mechanism to the base plate, so that all assemblies of the linear actuator are reasonably arranged, the size is reduced, the structure is more compact, and operation is more stable.

A linear actuator system includes a linear actuator including an outer body, an inner body disposed within the outer body, a fluid chamber at least partially extending between the inner body and the outer body, a piston chamber extending at least partially within the inner body, a valve configured to selectively fluidly couple the fluid chamber and the piston chamber to each other, a piston assembly including a piston, a variable volume within the piston chamber that extends between the piston and the valve, and a gas collector assembly including a fluid passageway. The piston assembly is disposed within the piston chamber, wherein a movement of the piston assembly causes a gas separated from a liquid within the variable volume to flow through the fluid passageway, through the valve, and into the fluid chamber.

The technology described herein is directed towards a reconfigurable surface device that reflects an impinging electromagnetic signal, with a phase profile determined by vertical positioning of a flexible metallic ground plane beneath metallic resonating elements of the reconfigurable surface. The vertical positioning forms different gaps between portions of the flexible ground plane and the respective metallic resonating elements above those portions, to determine the direction of the reflected beam. In one implementation, four individually linear actuators (vertical driving motors) are mechanically coupled to the corners of the ground plane of a metasurface (panel). These actuators and motors are independently controlled to establish the phase profile, by determining the amount of vertical positioning of each corner of the flexible ground plane to steer the reflected beam. The low-cost design can operate to steer millimeter wavelength beams in many wireless communication scenarios.

An adjustable bed base has a stationary frame and a stationary seat platform raised above the stationary frame. An articulating platform includes at least three platforms, head and foot platforms being hinged to the stationary seat platform. Front and rear linear actuators articulate the deck such that the head and foot platforms decline relative to the stationary seat platform when the linear actuators are fully retracted. The head and foot platforms are inclined when the linear actuators are fully extended.

The invention discloses a method and a system for automatically adjusting the rotation angle of an engine blade. The method for automatically adjusting the rotation angle of the engine blade comprises the following steps: collecting historical parameters of an engine, collecting real-time data of the engine, carrying out multi-dimensional data fusion on the data to extract key information, screening remarkable influence factors, and constructing a parameter influence network diagram; a four-channel long-short-term memory prediction model is established, four channels output corresponding prediction results respectively, and constraint and error correction are carried out on the prediction results; a corner angle is calculated according to a four-channel output prediction result, constraint limitation and a parameter influence network diagram, and an output corner instruction is directly mapped into actuator displacement; through compensation of a nonlinear actuator, the adjustment precision is guaranteed, and it is ensured that the actuator accurately executes a rotation angle instruction; and the model is lightened, so that the finally obtained decision tree model can efficiently run in an embedded system. The rotating angle of the engine blade can be automatically adjusted under different working conditions, and the adjusting efficiency of the rotating angle of the engine blade is improved.

A seat base includes a plurality of linear actuators each having a first end pivotally mounted to a base member and a second end pivotally mounted to a seat member. A controller is adapted for controlling an extension length of each of the plurality of linear actuators in a coordinated manner for adjusting a position of the seat member with six degrees-of-freedom and for damping vibration of the seat member. An active vibration mitigation method for reducing vibrations of an aircraft seat includes receiving vibration data from one or more accelerometers mounted to the aircraft seat and determining a vibration profile based on the vibration data. When vibration mitigation is warranted, control signals for damping vibration are determined and transmitted to a plurality of linear actuators adapted to support the aircraft seat.

An anti-pinch system for an electric seat includes a plurality of infrared sensing modules, a seat cushion hose, a footrest hose, a pressure sensor, at least one linear actuator, a central processing unit, a power module and a control module. When the user operates the electric seat to act, the plurality of infrared sensing modules and the pressures sensor synchronously sense whether an obstacle is under the electric seat. If an obstacle exists under the electric seat, the central processing unit will control the at least one actuator to stop or to reversely act. When the user cannot perceive obstacles by themselves, the electric seat can be automatically prevented from pinching obstacles, thus avoiding damaging the obstacles or the electric seat.

A testing device for determining a stiffness of a patient's tissue is provided herein that includes a probe housing, an internal probe housed in the probe housing, a load cell connected to the internal probe, and a linear-actuator connected to the load cell. The patient's tissue may be joint tissue, cervical tissue, uterine tissue, muscular tissue, and / or pulmonary tissue. The internal probe may be configured to translate within the probe housing, and the linear-actuator may be configured to move the load cell, causing translation of the internal probe within the probe housing. When the load cell is moved by the linear-actuator, the internal probe may translate within the probe housing, and a tip of the internal probe may cause indentation into a patient's tissue.

The utility model discloses a barrel cake gripping apparatus for a nuclear power station, which belongs to the field of barrel cake gripping apparatuses and comprises a connecting frame, a fixing disc is fixedly connected to the bottom of the connecting frame, holding claws are movably connected to four sides of the fixing disc, a linear actuator is fixedly connected to the top surface of the fixing disc, and a servo motor is fixedly connected to one side of the linear actuator. According to the arranged connecting mechanism, after a positioning rod on the bottom face of a mounting base is inserted into a positioning hole in the top face of a connecting frame, a concave plate is overturned upwards to enable an inserting plate to be aligned with a connecting opening, a screw knob is rotated to push a pressing plate to move through a rotating block till the inserting plate installed on the bottom face of the pressing plate penetrates through the connecting opening to be inserted into a limiting opening, and then the screw knob cannot be rotated; therefore, the purpose that the gripping apparatus is conveniently installed and fixed on the telescopic arm to be used is achieved, the gripping apparatus can be conveniently and timely detached from the telescopic arm to be maintained or replaced after the subsequent gripping apparatus breaks down, then the gripping apparatus can be conveniently detached and used on the telescopic arm, and the working efficiency is improved.

A wafer holding device configured to fix a and position a wafer having a positioning structure. The wafer holding device includes a base, a holder plate, pushing pins, a linear actuator, and a positioning member. The holder plate is disposed on the base. An upper surface of the holder plate is provided with an adsorption structure for adsorbing and fixing the wafer. The pushing pins are disposed on the upper surface in a protruding manner, and each pushing pin is disposed on the holder plate with respect to a predetermined datum center on the holder plate. The linear actuator is disposed on the base, and an actuating direction of the linear actuator is in parallel to the upper surface. The positioning member is driven by the linear actuator to move in the actuating direction to contact and push against the positioning structure of the wafer.

A new and improved powered chair comprises a chair frame, a backrest assembly, a seat assembly, a footrest assembly, a linkage system, and a linear actuator operatively connected, by the linkage system, to the backrest assembly, the seat assembly, and the footrest assembly for actuating the backrest assembly, the seat assembly, and the footrest assembly between various positions. The seat assembly comprises a seat plate having a substantially V or L-shaped configuration wherein a rearward leg of the V or L-shaped seat plate has a distorted or elongated N or Z-shaped configuration which includes a central, substantially horizontally extending section that, along with the seat plate, can accommodate an enlarged chair seat for, in turn, accommodating large or tall chair users.

The present disclosure is directed to a multifunctional tailgate door and cargo load system that includes a multidirectional bumper apparatus with adaptable tow hitch receiver. The multifunctional tailgate door is adjacent to a cargo bed area having a rail system attached to the multifunctional tailgate door. The rail system having a linear actuator includes a rotary actuator hinge that enables the multifunctional tailgate door to function in a first direction and in a second direction. The multidirectional bumper apparatus is operable in a first direction and in a second direction, and may work in conjunction with the multifunctional tailgate door. The multifunctional tailgate door has at least one anchor that works in conjunction with the cargo load system. The cargo load system includes a plurality of ports in a rear cargo floor surface having a plurality of winches and at least one motor for securing a cargo load.

The invention relates to the field of mechanical or material testing, and discloses a tension-torsion combined actuator, which comprises an outer frame assembly, a linear actuator, a guide mechanism, a torsion transmission mechanism, a displacement measuring device and a swing actuator, and is characterized in that the linear actuator and the swing actuator are fixed on the outer frame assembly through bolts; the guide mechanism is radially connected with a piston rod of the linear actuator through a bearing, axial fixation of the bearing is achieved through limiting of a shaft shoulder and an end cover, and the swing actuator transmits torsion action to the piston rod of the linear actuator through the torsion transmission mechanism. The tension-torsion compound actuator is provided with a displacement measuring device and an angle sensor, not only can realize a tension-compression fatigue test, a torsion fatigue test and a tension-torsion compound fatigue test, but also can provide high-precision displacement and angle control, and has the characteristics of multiple functions, high precision, high frequency response, lateral force resistance, low noise and low vibration; and the test efficiency is greatly improved.

The invention provides a humanoid robot and a dexterous hand thereof. The humanoid robot comprises a palm shell defining a containing cavity; the thumb comprises a first rotary actuator, a second rotary actuator, a transmission assembly and a thumb assembly, the first rotary actuator and the second rotary actuator are fixedly connected to the inner wall of the containing cavity, the transmission assembly is in transmission connection between the first rotary actuator and the second rotary actuator, and at least part of the thumb assembly extends out of the containing cavity; the thumb component is in transmission connection with the transmission component; each finger comprises a finger piece and a linear actuator, the linear actuators are fixedly connected to the cavity wall of the containing cavity, at least part of each finger piece extends out of the palm shell, and each finger piece comprises a connecting base, a finger near knuckle, a finger far knuckle, a finger far knuckle and a finger far knuckle rubber coating; and a connector board electrically connected to the first rotary actuator, the second rotary actuator, and the linear actuator. The dexterous hand is compact in layout, small in occupied space and high in movement precision, and the grabbing force of the dexterous hand is improved.

The invention provides a distributed electro-hydraulic driving system based on bucket rod independent oil supplementation and an electric excavator. The distributed electro-hydraulic driving system comprises a bucket distributed system assembly, a bucket rod distributed system assembly, a movable arm distributed system assembly and a hydraulic oil tank. Each distributed system assembly is provided with a driving motor to drive an open type variable pump to supply oil to the open type variable pump so as to independently drive a corresponding working oil cylinder to operate, and each bucket rod distributed system assembly is additionally and independently provided with a bucket rod oil supplementing motor to drive a bucket rod metering pump to supply oil to the bucket rod metering pump so as to solve the problems that when a bucket rod oil cylinder operates rapidly, the flow demand is large, and the operation is complex. And oil supply is insufficient. The system aims at achieving high-energy-efficiency distributed driving of multiple linear actuators of the electric excavator so as to solve the problems that a centralized hydraulic system of an existing electric excavator is high in energy consumption and low in energy efficiency.

A measurement system for a focal distance measurement of an optic includes: a translation stage including a base and platform configured to translate in linear motion relative to each other in an automated manner driven by a linear actuator; a reference material disposed on the translation stage and having a surface opposite the optic to be measured; a measuring device configured to measure a gap between the surface of the reference material and a distal tip of the optic in an automated manner; a spectrometer in optical communication with the optic; and a controller configured to operate the translation stage, the measuring device, and the spectrometer and to determine a focal distance of the optic based on a spectral characteristic of a measurement spectrum and on a final gap between the surface of the reference material and the distal tip of the optic at which the spectral characteristic is determined.

Embodiments of the present invention relates to friction damper (100) for washing or drying machines comprising a tubular hollow body (110) and a damping rod (120) arranged coaxially with respect to one another for moving along each other telescopically, wherein the damping rod (120) has an outer diameter less than an inner diameter of the hollow body (110).The hollow body (110) further comprises the hollow body (110) comprises a holder (130) for holding a friction unit (200). The friction unit (200) comprises a unit body (210); a friction member (220) inside the unit body (210) to which the damping rod (120) is slidably coupled for generating a friction force onto the damping rod (120); a stationary pressure element (230); a slidable pressure element (240) surrounding at least another part of the friction member (220); a linear actuator (260) fixed to the unit body (210) for providing a sliding motion to the slidable pressure element (240).