Provided is a double-row self-aligning roller bearing including: an inner ring; an outer ring having a spherical raceway surface; and rollers arranged in two rows and interposed between the inner ring and the outer ring, wherein a ratio of a contact angle θ1 in one row to a contact angle θ2 in the other row falls within a range of 0.25≤θ1/θ2≤0.5, and a ratio of distance B1 in a bearing width direction from an end face of the bearing on a side of the one of the rows to an intersection of two lines of action defining the contact angles of the two rows, relative to a distance B2 in the bearing width direction from an end face of the bearing on a side of the other of the rows to the intersection falls within a range of 0.5≤B1/B2≤0.6.

An apparatus for attaching a cannula to a robotic surgical system, the apparatus comprising: a clamp assembly configured to attach a cannula to a robotic surgical system, the clamp assembly comprising an actuator coupled to a clamp to transition the clamp between an open position configured to receive the cannula and a closed position to attach the cannula to the robotic surgical system; and a lock out assembly coupled to the clamp assembly to control the transition of the clamp, the lock out assembly having a hook that is dimensioned to engage a bearing coupled to the actuator when the clamp is in the open position and disengage the bearing to allow the clamp to automatically transition to the closed position.

An apparatus for attaching a cannula to a robotic surgical system, the apparatus comprising: a clamp assembly configured to attach a cannula to a robotic surgical system, the clamp assembly comprising an actuator coupled to a clamp to transition the clamp between an open position configured to receive the cannula and a closed position to attach the cannula to the robotic surgical system; and a lock out assembly coupled to the clamp assembly to control the transition of the clamp, the lock out assembly having a hook that is dimensioned to engage a bearing coupled to the actuator when the clamp is in the open position and disengage the bearing to allow the clamp to automatically transition to the closed position.

An object of the present invention is to provide a rolling bearing which makes use of a porous rolling element and a selected kind of lubricant to impregnate with; is usable in various conditions; does not discharge foreign objects; and features low dust generation and long life. A rolling bearing includes an outer ring 2; an inner ring 1; and a plurality of rolling elements 3 assembled between mutually opposed outer ring track surface 2a and inner ring track surface 1a. The plurality of rolling elements 3 is provided by a combination of a porous rolling element 3a impregnated with a lubricant and a non-porous rolling element 3b.

A speed change device comprising an inner race having an outer surface, an outer race having an inner surface, and set of orbital rollers including inner rollers in rolling contact with the outer surface of the inner race and outer rollers in rolling contact with the inner surface of the outer race.

A bearing assembly having an inner race, an outer race, and a plurality of rollers positioned between the inner race and the outer race. A pad is attached to the inner race and a bed is attached to the outer race. A timing mechanism is slidably mounted to the pad and the bed. Preferably the pad and bed are made of plastic and the inner race is embedded within the pad and the outer race is embedded within the bed.

A load-variable rolling bearing includes: an outer ring having an outer ring raceway surface with spherical surface contact portions having concave arch sections and a variable contact portion having a shape of a cylinder in such a manner as to be adjacent to the spherical surface contact portions in an axial direction of the spherical surface contact portions; an inner ring having an inner ring raceway surface with spherical surface contact portions having concave arch sections and a variable contact portion having a shape of a cylinder in such a manner as to be adjacent to the spherical surface contact portions in an axial direction of the spherical surface contact portions; and a plurality of rolling elements each having a cylindrical variable contact portion and spherical surface portions formed with convex spherical surfaces on both sides of the variable contact portion.

An arrangement for supporting a rotary drum, the rotary drum having at least three riding rings distributedly arranged along the axial direction of the rotary drum, the arrangement including a pair of relatively spaced rollers for supporting a riding ring, at least one bearing for each roller, a support for each bearing mounted for movement of the roller toward and away from the shell of the rotary drum and a spring system exerting a spring force acting on the support to counteract the weight of the rotary drum resting on the rollers, wherein the spring system includes a pressure vessel charged with a compressed gas that exerts the spring force and the rotary drum includes at least three riding rings and only at least one middle ring arranged between two outer rings is supported by a pair of relatively spaced rollers that are equipped with the spring system.

Disclosed is an electronic motor with two bearings. The motor is structured so that, when loaded, the majority of the load (e.g., a radial load) is borne by one of the bearings. The bearing that bears a greater load may be larger and, thus, better suited for a heavy load. In some embodiments, the larger bearing may include rolling elements that have respective radii larger than respective radii of rolling elements of the other bearing by a ratio of at least 1.5 (150%). In some embodiments, the larger bearing may have an outer race with a radius that is greater than a radius of the outer race of the smaller bearing by a ratio of at least 1.5. In some embodiments, the motors may include a third bearing between the two bearings. The third bearing may reduce vibration in the motor.

In a floating unit, a floating mechanism is provided with: a rolling portion that includes a holding portion fixed to one of a first member and a second member, a sphere held by the holding portion so as to be rotatable in all directions; and an opposing portion that is fixed to the other one of the first member and the second member, and has an abutment surface that abuts against the sphere. The abutment surface includes an inclined surface that is formed, over the entire region of the abutment surface in a circumferential direction around a reference position, so as to come close to a side, in the vertical direction, on which the sphere is arranged, while extending outward in the horizontal direction from the reference position.