Abstract: This disclosure relates to methods and apparatuses of employing belts for an angular drive. A twisted geometry is applied to a first free span of the belt. A sheave supports the first free span of the belt at a first extremity of the first free span and sheave is at least one of positioning and orienting the rotating sheave or the driven sheave so as to misalign a geometric centerline of the first free span of belt at a given fleet angle with respect to a second extremity of the first free span.

Abstract: A multi-degree-of-freedom robotic arm includes a body mechanism, an actuator mechanism, and a control system. The body mechanism has a first end rotating around a vertical heading axis and a second end rotating around a horizontal first pitch axis. The actuator mechanism is installed at the second end of the body mechanism and includes: a first roll mechanism rotatably installed at the second end around a first roll axis perpendicular to the first pitch axis; a second roll mechanism rotating around a second roll axis and installed with an end actuator; and a pitch mechanism installed at a junction between the first roll mechanism and the second roll mechanism so that the second roll mechanism rotates around a second pitch axis with respect to the first roll mechanism. The control system controls and drives an operation of the body mechanism and the actuator mechanism.

Abstract: A bicycle-used hub gearing system includes a hub gearing and a rotational element. The hub gearing includes a hub and a shift rod formed with a first end located in the hub and a second end located out of the hub. The rotational element includes a slope in contact with the second end of the shift rod. The slope includes various gear points for contact with of the second end of the shift rod, thereby keeping the first end of the shift rod in various depths in the hub corresponding to various gears of the hub gearing.

Abstract: A self-locking mechanism for a gearing arrangement, a gearing arrangement, an actuator, and a lifting platform, which relate to the technical field of lifting tables. The self-locking mechanism includes a casing, a self-locking gear, and a brake member, the self-locking gear meshing with the gearing arrangement, the brake member being connected between the casing and the self-locking gear; in a case where the gearing arrangement pushes the self-locking gear forwardly, the brake member releases the self-locking gear, and in a case where the gearing arrangement pushes the self-locking gear reversely, the brake member brakes the self-locking gear.

Abstract: A linear guide system has at least a first rail element and a second rail element, which are mounted to be linearly slidable opposite one another in and counter to an extraction direction, a linear drive, which includes a rotatable drive shaft and an electric motor configured for the transmission of a torque to the drive shaft. The linear drive is configured such that a rotational movement of the drive shaft causes a linear movement of the first and second rail elements relative to one another in or counter to the extraction direction. A locking element is provided, which can be set and reset between an unlocked position and a locked position, which, for blocking the rotational movement of the drive shaft in the locked position, is configured so as to engage in a form-locking or force-locking manner with an engaging element connected to the drive shaft in a rotationally fixed manner or configured as a portion of the drive shaft.

Abstract: An apparatus includes a drive; a movable arm connected to the drive, the movable arm comprising a first link connected to the drive at a shoulder, a second link connected to the first link at an elbow, a third link connected to the second link at a wrist, and a fourth link connected to the second link at the wrist; at least one first actuator located in the second link configured to cause a rotation of the third link about the wrist; and at least one second actuator located in the second link configured to cause a rotation of the fourth link about the wrist. One or more of a thermal management, a power distribution, or a communication is effected through the second link.

Abstract: A horsehead is used on a walking beam of a reciprocating pump unit. The horsehead includes side plates, a face, tabs, and brace plates. The side plates are spaced apart, and the face affixed to front, arced edges of the side plates. The face defines a split therein extending from a bottom end toward a top end, and the tabs are affixed to the face across the split. The face thereby defines two runner surfaces. A fixture at the top end of the face can be used for connection to a bridle of the pump unit. The brace plates are connected in the space between the side plates and are arranged in a lattice structure. Preferably, the brace plates include cutouts to reduce weight.

Abstract: The present invention relates to a linear actuator with an improved electric motor. In particular, the invention focuses on improved technical solutions for braking or locking of a rotating electric motor by using an electro-mechanical locking mechanism. The mechanism uses a solenoid having a nonrotating locking element, which is displaceable by solenoid action and arranged to engage with a rotating locking element. In particular, solutions have been found in which a surprisingly small solenoid with a much-reduced requirement on stroke length may be deployed to effectively unidirectionally or bidirectionally lock against rotation of the motor.

Abstract: Aircraft door designed to assume a first configuration and a second configuration, having a bistable mechanism biasing the aircraft door towards either the first or second configuration, the bistable mechanism including: a first yoke having a base attached to the first member and a first pivot rotatably mounted on the base; a second yoke having: a base attached to the first member; a lever a first end of which is mounted so as to pivot on the base; a second pivot mounted so as to rotate on the second end of the lever; a coupling device for coupling the lever to the second member of the door; an arch which can be elastically deformed by bending and a first end of which is attached to the first pivot and a second end attached to the second pivot.

Abstract: A transmission device (1) includes an oil feeder (7) including coil springs (9a, 9b) urging a feeder body (8) in a third direction. The third direction is perpendicular to a first direction and to a second direction, where the first direction is the axial direction of rotation of a pinion (2), and the second direction is a direction of a specific tangent of tangents to a circle being a path of the outermost peripheries of revolving pin rollers (4). The transmission device (1) has less performance decrease in feeding oil to the pin rollers (4) resulting from wear of the feeder body (8).

Abstract: A joint assembly, a swing device and a robot are provided. The joint assembly includes a movable part defining a movable groove and a rotating part. The rotating part includes a rotating body being a spherical shape. The rotating body is rotatably received in the movable groove to adapt to the movable part. The rotating part defines an air hole with an air inlet and an air outlet. The air inlet is configured to receive introduced air, and the air outlet is configured to expel the air to the movable groove.

Abstract: An actuator device includes a base body that defines a receiving space. A first end subunit has a ventilation hole, a first oil injection hole, and a first oil injection nozzle extending from the first oil injection hole into the receiving space. A second end subunit is connected to the base body. A sliding unit is slidable relative to the base body, and has a slide table, a nut seat connected to the slide table, and a connection hole connected to the slide table and the base body. A pressure relief unit is mounted in the ventilation hole for allowing air to be discharged from the receiving space to an external environment. A driving unit is operable for driving movement of the sliding unit.

Abstract: In various implementations a removable appendage of a robot can allow for stable pitch and yaw, while mitigating interference with other movements of the robot. A neck of the robot can include at least two linear actuators, each coupled to a rod that is driven to move linearly from the linear actuators. An appendage of the robot can be coupled to the neck. The appendage can include a at least two tracks, where each track receives an end of the rods to slidably engage the rod.

Abstract: An electromechanical linear actuator includes a threaded drive which has a threaded spindle and a threaded nut. The threaded spindle is coupled to a hollow shaft of an electric motor via a rotationally fixed connection. The threaded nut is fastened to a linearly movable extension tube. In a maximally retracted state of the extension tube, the threaded nut is retracted at least in portions, preferably completely, into the interior of the hollow shaft. During operation of the linear actuator, the threaded spindle rotates and is not moved linearly. The threaded nut does not rotate and is moved linearly.

Abstract: An actuator assembly includes a compliant actuator shaft having an axis (A) and a first end and a second end, a drive assembly provided at the first end of the compliant actuator shaft to cause rotation of the compliant actuator shaft about the axis and an overtravel stop mechanism. The overtravel stop mechanism includes: a screw shaft mounted to and arranged to rotate with the second end of the compliant actuator shaft, the screw shaft having an outer thread extending in the axial direction; a nut threadedly mounted to the outer thread of the screw shaft that moves axially relative to the screw shaft as the screw shaft rotates; a first stop fixed to and radially extending from the screw shaft to define the axial limit of movement of the nut relative to the screw shaft, in a first axial direction.

Abstract: Disclosed is a linear actuator, including a drive motor, a transmission assembly, a rotary screw, a transmission nut, a clutch device, a self-locking device and a hand-pull release assembly. The clutch device is arranged between the transmission assembly and the rotary screw. The self-locking device is configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and the self-locking device includes a release torsion spring. The hand-pull release assembly includes a first driving member connected with the clutch device and a second driving member connected with the self-locking device, and has an initial state and a fully released state. During the process from the initial state to the fully released state, the first driving member drives the clutch device to disconnect power, and the second driving member drives the release torsion spring to extend.

Abstract: A linear actuator comprising a shaft and a nut in engagement with the shaft such that the nut translates within a linear range of motion axially on a center axis relative to the shaft in response to relative rotation between the nut and the shaft, a stop positioned at a travel limiting position and having a rotational input portion and an axial output portion, the rotational input portion configured to rotate about the center axis relative to the shaft, the axial output portion constrained from rotating about the center axis relative to the shaft and configured to translate axially on the center axis relative to the rotational input portion in response to relative rotation between the axial output portion and the rotational input portion, and an axially compliant member configured to bias the axial output portion towards the travel limiting position.

Abstract: In a spindle system with a hollow spindle for a linear actuator, the linear actuator has a telescopic tube system including an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube. A bearing is arranged to transmit axial forces between the hollow spindle and the outer tube. The hollow spindle at least partially surrounds an inner shaft of the spindle system and is connected to the inner shaft of the spindle system by one or more tappets of a positive and axially displaceable shaft-hub connection. The hollow spindle has a bearing seat for the bearing and an external thread on an outer side.

Abstract: A cable actuator (100) having a frame (10); a screw (2) rotatably mounted on the frame (10) and extending along a first axis (Ox); a nut (4) cooperating with the screw (2); a mechanism (30) for estimating the angular movement of the nut (4) about the first axis (Lx) relative to the frame (10); and a distance sensor (30) secured to the frame (10) and having a winder (33) for winding a thread (32), one end (32.1) of the thread (32) connected to the nut (4) at a connection point (4.1). The distance sensor (30) is arranged in such a manner that the thread (32) changes curvature at a first point (34) situated in a first plane (P1) orthogonal to the first axis (Ox).

Abstract: The invention relates to a control drive, in particular a spindle drive for adjusting a swivelable vehicle flap, comprising a housing (2), a spindle rod (3) that is rotatably mounted in the housing (2), a first coupling element (5) for driving a rotational movement of the spindle rod (3), and a torque-limiting device (6) arranged between the first coupling element (5) and the spindle rod (3) for limiting the torque transmitted from the first coupling element (5) to the spindle rod (3), comprising an adapter sleeve (8) arranged at a first end (3a) of the spindle rod (3) in a rotationally fixed manner, and a first tolerance element (13) arranged between the spindle rod (3) and the first coupling element (5). According to the invention, a control drive is provided, which is designed such that it is compact and can be economically produced, in such a way that the first tolerance element (13) is rotationally fixed to one of the first coupling element (5) and the adapter sleeve (8).