The invention discloses a rotatable crystal lamp, which includes a lamp holder and a crystal lamp on the upper end face of the lamp holder, characterized in that a support block is provided on the upper side of the lamp holder and a support is provided on the upper end face of the lamp holder. The support column of the support block is provided with a crystal lamp cover on the upper side of the crystal lamp, and a driving cavity is provided in the support block. In the work of the present invention, the movement mode of the crystal lamp cover can be automatically switched to obtain different lighting effects. Improve the practicality and fun of the crystal lamp, through mechanical transmission, but also make the work efficiency to a certain degree improved.

Various embodiments provide a bearing element for an electrode rod in a lamp stem. The bearing element includes an envelope configured in order to extend along a longitudinal axis of the electrode rod. The envelope has a polygonally shaped cross section at least in sections.

A bearing assembly comprises a bearing wheel with a rotational axis, the bearing wheel including and extending radially between an inner surface and an outer surface, wherein the inner surface at least partially forms a bore, the bore extends axially through the bearing wheel along the rotational axis, and the bore has a cross-sectional geometry configured to receive a rotatable shaft with a complementary cross-sectional geometry, and wherein the outer surface extends circumferentially around the rotational axis, and the outer surface has a circular cross-sectional geometry. The bearing assembly also comprises a bearing collar comprising a collar base and a collar mount, wherein the collar base includes an inner surface configured to circumscribe and slidingly engage the outer surface of the bearing wheel, wherein the collar mount projects radially out from collar base to a distal mount end, and wherein a plurality of mounting apertures at the distal mount end extend axially through the collar mount, and the mounting apertures are configured to respectively receive fasteners for securing the collar mount to a stationary structural member.

The invention discloses a rotatable crystal lamp, which includes a lamp holder and a crystal lamp on the upper end face of the lamp holder, characterized in that a support block is provided on the upper side of the lamp holder and a support is provided on the upper end face of the lamp holder. The support column of the support block is provided with a crystal lamp cover on the upper side of the crystal lamp, and a driving cavity is provided in the support block. In the work of the present invention, the movement mode of the crystal lamp cover can be automatically switched to obtain different lighting effects. Improve the practicality and fun of the crystal lamp, through mechanical transmission, but also make the work efficiency to a certain degree improved.

A friction joint includes a housing having a channel. A first tension ring member is arranged within the channel, and has an outer dimension that is resiliently expandable. A first rotor member is received within the central opening of the first tension ring member. The first rotor member causes the outer dimension of the first tension ring member to expand within the channel of the housing and press against at least a portion of the housing. The first rotor member is frictionally engaged with and rotatable relative to the first tension ring member when the first rotor member is received within the central opening of the first tension ring member.

Example embodiments relate to tiltable luminaire joints. One example tiltable joint for a luminaire includes a first joint portion that includes a joint member provided with an outer cylindrical surface section having an axis and opposing bearings aligned with said axis. The outer cylindrical surface section being provided with a first plurality of interengaging surfaces. The tiltable joint also includes a second joint portion that includes a joint housing provided with a pair of axially-aligned receiving surfaces, and an inner cylindrical surface provided with a second plurality of interengaging surfaces configured to interengage the first plurality of interengaging surface. The joint member of the first joint portion is configured for being housed within the joint housing of the second joint portion. Further, the tiltable joint includes first and second shaft portions that extend in alignment with the pair of axially-aligned bearings. Additionally, the tiltable joint includes a fixation means.

A robotic coupling joint system and method are discussed herein, which may be utilized with a daylighting system or photovoltaic system to track sunlight. The system may provide a spherical joint allowing axial motion about two or more axes of the spherical joint. The joint comprises a first plate with four or more sockets, a second plate, a connector, and one or more spheres positioned between the first and second plates. The connector secures the sphere between the first and second plates. The system may also include a stand, an end effector coupled to the stand by the spherical joint, and a mobility system that is capable of actuating the end effector. The mobility system includes two or more linking elements coupled to the end effector, and a motor coupled to the linking elements to actuate the end effector to track sunlight.

A bearing unit comprising rolling elements, housed in a radially inner mounting seat of a casing. The bearing unit includes a radially outer and stationary coated ring provided with a metal ring and a liner of elastomeric material integral with a radially outer surface of the metal ring, a radially inner ring, which is rotatable with respect to an axis of rotation (X), and a row of rolling elements interposed between the coated ring and the radially inner ring. The elastomeric material of the liner is a vulcanized thermoplastic material. The liner is co-molded onto the radially outer surface of the metal ring and may include a cylindrical body and at least two annular protuberances which fit inside corresponding anchoring grooves formed on the surface of the metal ring.

Various embodiments provide a bearing element for an electrode rod in a lamp stem. The bearing element includes an envelope configured in order to extend along a longitudinal axis of the electrode rod. The envelope has a polygonally shaped cross section at least in sections.

Example embodiments relate to tiltable luminaire joints. One example tiltable joint for a luminaire includes a first joint portion that includes a joint member provided with an outer cylindrical surface section having an axis and opposing bearings aligned with said axis. The outer cylindrical surface section being provided with a first plurality of interengaging surfaces. The tiltable joint also includes a second joint portion that includes a joint housing provided with a pair of axially-aligned receiving surfaces, and an inner cylindrical surface provided with a second plurality of interengaging surfaces configured to interengage the first plurality of interengaging surface. The joint member of the first joint portion is configured for being housed within the joint housing of the second joint portion. Further, the tiltable joint includes first and second shaft portions that extend in alignment with the pair of axially-aligned bearings. Additionally, the tiltable joint includes a fixation means.