453results about How to "Reduce contact stress" patented technology

A charge transport layer serving as a surface layer of an electrophotographic photosensitive member contains a charge transporting material, polyester resin A containing a siloxane moiety and at least one of polyester resin C and polycarbonate resin D. The content of a siloxane moiety in polyester resin A is not less than 10% by mass and not more than 40% by mass relative to the total mass of polyester resin A. The charge transport layer has a matrix-domain structure having a matrix formed of the charge transporting material and at least one of polyester resin C and polycarbonate resin D and a domain formed of polyester resin A in the matrix.

A seal segment is provided for a shroud ring of a rotor of a gas turbine engine. The seal segment is positioned, in use, radially adjacent the rotor. The seal segment has two or more spaced passageways. In use, a respective support bar can be contained within each passageway. The support bars allow attachment of the seal segment to the engine casing. Each passageway has an elliptical or substantially elliptical cross-section with a minor diameter and a major diameter, the minor diameter being substantially aligned with the radial direction. The respective support bar has a correspondingly elliptical or substantially elliptical cross-section for a close fit in the passageway.

A method and system for measuring tension, pressure, and distance of knee tissue, the system comprising a prosthetic inlay device comprising at least two platform structures, wherein each of the platforms are supported on a scissor arm structure and a coil spring, a force sensing sensor configured beneath each coil spring, and a connector cable coupled to the force sensing sensors.

The tibial component of a prosthetic ankle joint including a tibial component, a talar component, and an intermediate sliding plastic bearing, with the tibial component including a depending peripheral wall that surrounds and is spaced from the plastic bearing and is intended to reduce rubbing of the plastic bearing against tissue which would produce wear particles that lead to the formation of bone cysts. The depending peripheral wall of the tibial component is intended to reduce such possible abrasions by at least partially shielding the plastic bearing from the surrounding tissue.

The invention relates to a bidirectional conjugate tooth profile design method for harmonic gear drive. The bidirectional conjugate tooth profile design method for harmonic gear drive comprises the steps of firstly, expressing a flexible wheel top-section convex tooth profile coordinate through a parameter equation, converting to a rigid wheel coordinate system, solving to obtain discrete point coordinates of a theorical conjugate concave tooth profile and a concave tooth profile of a flexible wheel top-section convex tooth profile, determining the working tooth depth of a rigid wheel tooth profile through least square fit, determining a fitted curve section to be a rigid wheel bottom-section concave tooth profile and a rigid wheel top-section concave tooth profile, and calculating to accomplish a tooth profile design of a rigid wheel; and then expressing a rigid wheel top-section convex tooth profile coordinate through a parameter equation, converting to a flexible wheel coordinate system, solving to obtain discrete point coordinates of a theorical concave conjugate tooth profile in a flexible wheel bottom-section range, determining the tooth depth of a flexible wheel through least square fit, determining a fitted curve to be a flexible wheel bottom-section concave tooth profile, and calculating to obtain a flexible wheel working tooth profile. According to the bidirectional conjugate tooth profile design method for harmonic gear drive provided by the invention, the flexible wheel tooth profile and the rigid wheel tooth profile with bi-conjugate and secondary-conjugate phenomena are directly obtained, so that a conjugate contact area and a meshing zone are increased, the tooth surface contact stress is reduced, and the drive accuracy of a harmonic reducer is improved.

An abrasion resistant coating and method are provided wherein the abrasion resistant coating contains both ductile and brittle components having a bimodal size distribution. The abrasion resistant coating is initially applied to a substrate in contact with an abrasive environment. The abrasive resistant coating having a bimodal size distribution results in the minimized exposure of the ductile components of the wear surface to the abrasive environment such that the life of the abrasive resistant coating is extended.

The invention discloses a mechanical double energy storage impact mechanism and a mechanical double energy storage impact method. The mechanism comprises a frame, a rotating shaft is arranged on the frame, the rotating shaft is fixedly connected with a swinging arm, the swinging arm is connected with a hammer head, a torsion spring is arranged coaxial with the rotating shaft, the swinging arm is fixedly connect to one end of the torsion spring, and the other end of the torsion spring is fixed on the frame. An electric driving mechanism and a first electromagnet are arranged on the frame, the first electromagnet is connected with a drag hook, a gear clutch is arranged on the electric driving mechanism, and a lever is movably connected to the frame and movably matched with the drag hook; and a second electromagnet is arranged on the frame through a mounting arm. The mechanism has two energy storage links, namely deformation energy storage of the torsion spring and elastic bending energystorage of the swinging arm, so that the contact stress during impacting can be effectively reduced and the working surface of a workpiece is well protected. By using the mechanism and the method, conventional heavy manual hammering can be replaced, and the labor intensity is lightened; and the mechanism can also be used for replacing the conventional starting pneumatic striker in the powder conveying process to prevent blockage.

The invention relates to a double-layer winding steel wire rope groove reel. The double-layer winding steel wire rope groove reel is provided with a reel body with a left flange and a right flange, wherein a rope groove is formed on the circumferential surface of the reel body; a steel wire rope fixing groove is formed at the starting end of the rope groove on the circumferential surface of the reel body; the rope groove is a spiral line rope groove; a climbing boss is arranged on the reel circle, at the tail end of the rope groove, of the reel body; the height of the climbing boss is gradually increased on the circumferential surface of the reel body along the circumferential extension angle; a guide baffle ring is arranged on the inner side, corresponding to the climbing boss, of the right flange; and the thickness of the guide baffle ring is gradually increased in the circumferential direction along with the extension angle. In the process of the steel wire rope climbing among layers, the guide baffle ring can guide the steel wire rope to change the winding direction, so that rope skipping and rope disordering are avoided and the rope can be tidily and tightly arranged on the second layer of the reel; the climbing boss has the effects of supporting and positioning, so that the contact stress between the steel wire ropes in the climbing process is effectively reduced and abrasion is reduced; the reel has a simple structure; the rope groove is easy to process; and precision is high and cost is low.

The invention concerns a chain for a chain transmission with chain links coupled by a parellel chain pins, each chain link having at least one link plate, the chain pins forming pivot axes for the link plates at a pitch distance whereby a chain link axis perpendicularly intersects the two pivot axes, said link plates having towards at least one end side of the link plate a cam surface for supporting the link plate on a cylindrical support surfaces of a sprocket wheel with a pitch angle. In accordance with the invention the cam surface ends in a convex curved plane with near the end side an increasing slope angle with the link axis whereby the slppe angle increases to at least half of the pitch angle or to at least seven degrees.

The invention relates to a bending device of a special rail transfer joint flexible turnout for straddle type monorail traffic line. The bending device comprises guide panels, stabilization panels, mount supports, cam support shafts, axial cams, double-plug connecting rods, roller assemblies, a connecting rod pair and an electric push rod, and adopts a cam and pull rod series connection driving form to realize synchronous bending of a guide surface and a stabilization surface; the guide panels and the stabilization panels are connected with the two ends of the double-fork-head pull rods by reamed holes; the double-fork-head pull rods are connected with driven components; the driven components are contacted and connected with cylindrical cam mechanisms; the above two adjacent cylindrical cam mechanisms and the two vertically corresponding cylindrical cam mechanisms are connected by connecting rods; when the electric push rod starts to push and pull, the pull rod drives the guide panels to move transversely and synchronously, and therefore, the transverse bending of the guide panels is accomplished.

The invention discloses a flexible dynamic-pressure gas thrust bearing and an assembling method thereof. The flexible dynamic-pressure gas thrust bearing comprises a bearing block, an elastic support connected to the bearing block and top-layer flat foil connected to the elastic support. The top-layer flat foil comprises a plurality of flat foil pieces fixedly connected to the elastic support to form a bearing working plane. The flexible dynamic-pressure gas thrust bearing has the advantages that the thrust bearing does not have an inlet slope structure machined in advance, the inlet slope structure of the thrust bearing is formed through self-acting during bearing work, the bearing does not limit the rotation direction of a rotor thrust collar, that is to say, the rotor thrust collar can rotate along different directions, the bearing can work normally, and a traditional flexible dynamic-pressure gas bearing only allows the rotor thrust collar to rotate along one direction; the flexible feature of the dynamic-pressure gas thrust bearing can be regulated simply, and the rigidity feature of the bearing can be regulated conveniently by changing the elasticity of the elastic support so as to adapt to the rigidity requirements on the bearing under different application conditions.