摘要:
A vehicle wheel bearing apparatus with a back-to-back double row tapered roller bearing has an outer member integrally with a body mounting flange and double row outer raceway surfaces tapered open respectively axially inward and outward. An inner member include a wheel hub and an inner ring or an outer joint member of a constant velocity universal joint. The wheel hub has a wheel mounting flange and one inner raceway surface arranged oppositely to one of the double row outer raceway surfaces and a cylindrical portion. The inner ring or the outer joint member of a constant velocity universal joint are press fit onto the cylindrical portion and include the other inner raceway surface arranged opposite to the other raceway surface of the double row outer raceway surfaces. Double row tapered rollers are freely rollably held between the outer and inner raceway surfaces by cages. Seals are arranged in annular openings formed by the outer and inner members. The cages are formed of synthetic resin. Posts between pockets of the cages are arranged to be positioned radially inward of the pitch circle diameter of the tapered rollers. The width of an opening radially inward of each pocket is set so that each tapered roller is held within the pocket. The contacting tapered surfaces of the posts open radially outward so that the rollers do not fall out radially inward.
摘要:
The axially stiff link provides a rigid connection linking two shaft segments (1, 2) of a shaft such that it can bend and or twist yet remain rigid with no slop for high tolerance positioning applications. The link is composed of two rolling elements (4) attached to the shaft segments (1, 2) having a rolling line contact (10) with each other. The rolling elements (4) are held together and preloaded by a ring spring (6) which encircles a portion of the rolling element extending transversely from the shaft segment and engages it by rolling line contact (8). The rolling elements may be solid plain curved portions of the shaft ends, a cylindrical bar, cylindrical bar pairs, or conical pairs to provide for torsional as well as axial bending in the link. Closely spaced perpendicularly disposed axial links provide for 2 axis bending of the shaft.
摘要:
A biological forceps device for the taking of tissue samples from a body, comprising a flexible main coil attached at its distal end to a pair of homologous cast jaws. The jaws have radially arranged teeth on their distalmost end. The jaws are opened and closed by attachment to a pair of pull wires which extend through the main coil, into a handle at its proximal end. The handle has a spool which slides about a central shaft attached to the main coil. The spool is attached to the pull wires, so that movement of the spool with respect to the central shaft, effectuates a force on the proximal ends of the levered jaws, to open and close them, appropriately.
摘要:
A coupling device for coupling a floor-treating unit to a rod-like device for guiding the floor-treating unit includes a first coupling part and a second coupling part. The first coupling part is hingedly connected to the elongated rod at a hinge axis and the second coupling part is rotatably mounted on the floor-treating unit for rotatable movement about a generally horizontal rotational axis. The first coupling part is movably positioned in a slot in the second coupling part for movement between a first positional setting in which the second coupling part is locked against rotational movement, a second positional setting in which the rod is movable about the hinge axis to unlock the second coupling part and permit rotational movement of the second coupling part about the rotational axis, and a third positional setting in which the rod is movable about the hinge axis for being lowered over the floor-treating unit in a stored position.
摘要:
Disposable laparoscopic surgical instruments for insertion through trocar tubes are disclosed. The instruments broadly include: a hollow aluminum tube; an aluminum clevis which is formed separately from the aluminum tube with the distal end of the hollow aluminum tube crimped around the proximal end of the clevis, and with the clevis including an axially off-set pivot pin; at least one end effector element having a pivot hole through which the off-set pivot pin of the clevis is pivotally engaged, and another through-hole; an aluminum push rod extending at least partially through the hollow aluminum tube and mechanically coupled to the end effector element; and apparatus for imparting reciprocal motion to the push rod relative to the aluminum tube, whereby the reciprocal motion is translated at an offset pivot of the clevis into a high torque pivotal motion of the end effector element.
摘要:
A separately formed clevis of a disposable laparoscopic surgical instrument is provided. The clevis fixedly engages a hollow aluminum tube of the disposable laparoscopic surgical instrument and pivotally engages an end effector of the disposable laparoscopic surgical instrument. The clevis includes: a hollow first portion having a knurled outer surface having a diameter slightly smaller than the inner diameter of the aluminum tube, for fitting closely within the aluminum tube and for fixedly engaging the aluminum tube when the aluminum tube is crimped thereover; a second portion having a base section with a bore corresponding to the inner diameter of the hollow first portion, and a pair of parallel, spaced apart, opposed arm members integrally joined to the base portion at respective first ends of the opposed arm members and extending away from the hollow first portion; and a pivot rod which engages the opposed arms in a substantially transverse manner. The pair of arms preferably each are undercut with a groove on their outer surfaces to permit shrink wrap to be applied to the aluminum tube and clevis and to terminate in the grooves.
摘要:
A biological forceps device for the taking of tissue samples from a body, comprising a flexible main coil attached at its distal end to a pair of homologous cast jaws. The jaws have radially arranged teeth on their distalmost end. The jaws are opened and closed by attachment to a pair of pull wires which extend through the main coil, into a handle at its proximal end. The handle has a spool which slides about a central shaft attached to the main coil. The spool is attached to the pull wires, so that movement of the spool with respect to the central shaft, effectuates a force on the proximal ends of the levered jaws, to open and close them, appropriately.
摘要:
A universal joint having first and second shaft members respectively including a pair of yoke portions and a ball member disposed between the first and second shaft members for movably interconnecting the same. The respective first and second shaft members are constituted by two separate half-elements together with forming the respective pair of yoke portions. Base seats respectively having a truncated cone shape are provided in mutually opposing faces of the yoke portions such that each virtual cone has a virtual vertex having an angle of substantially 90 degrees and at the same time the virtual vertexes of the cones are substantially in contact with each other, the base seats respectively defining arc faces in mutually opposing surfaces thereof. And, the arc faces respectively have a central axis in a direction transverse to the shaft members and are formed by a part of a peripheral face of a virtual cylinder having the same diameter as the ball member which is rotatably supported between these arc faces.
摘要:
A method for forming a precision ball groove track in a part, especially in an outer race member of a universal joint. The method includes the steps of forming a recess groove in the ball race groove track and .[.ball.]. finish machining the .Iadd.ball .Iaddend.race groove track to a predetermined precision shape, the recess .[.reducing groove.]. .Iadd.groove reducing .Iaddend.the wear on the finish machining tool used during the finish machining step.