A lubricatable ball spline device includes a ball spline shaft, a ball nut slidably sleeved on the ball spline shaft and having oil guide holes, a linear bearing unit mounted between the ball spline shaft and the ball nut, a bearing ring rotatably sleeved on the ball nut and having an oil supplying hole, a positioning portion disposed between the bearing ring and the ball nut, and an oil passage corresponding to the oil supplying hole. The oil supplying hole, the oil passage, an oil storage space of the positioning portion and any one of the oil guide holes cooperatively form a continuous oil path.

A lubricatable ball spline device includes a ball spline shaft, a ball nut slidably sleeved on the ball spline shaft and having oil guide holes, a linear bearing unit mounted between the ball spline shaft and the ball nut, a bearing ring rotatably sleeved on the ball nut and having an oil supplying hole, a positioning portion disposed between the bearing ring and the ball nut, and an oil passage corresponding to the oil supplying hole. The oil supplying hole, the oil passage, an oil storage space of the positioning portion and any one of the oil guide holes cooperatively form a continuous oil path.

The present disclosure relates to an ultrasonic imaging apparatus that has a tolerance for easy assembly and reduces shaking and noise by reducing the tolerance after assembly. The ultrasonic imaging apparatus includes a main body, a probe connected to the main body to irradiate and receive ultrasonic waves and to transmit the ultrasonic signals to the main body, a control panel configured to control the main body or the probe, and a moving device configured to connect the control panel and the main body and to move the control panel with respect to the main body in the upward and downward directions, wherein the moving device includes a housing fixed to the main body, a moving member configured to be movable with respect to the housing in the upward and downward directions, and a regulating bearing installed in the housing and configured to assist the upward and downward movement of the moving member by coming into rolling contact with the moving member and to regulate a gap with the moving member.

A bearing assembly, in particular for a converter, including a rolling bearing having an outer ring which is arranged in an inner housing, the inner housing being movable with respect to an outer housing in the axial direction of the rolling bearing by means of a two-row linear rolling bearing structure, and the rotational axes of all the rolling elements in each row of the linear rolling bearing structure lying in a common plane, and the two planes being at an oblique angle to one another. At least one anti-rotation element which engages in a mating contour in the outer housing is connected to the inner housing.

An actuator includes a track member provided with a base extending along a longitudinal direction and a pair of walls erected from opposite ends of the base in a width direction, with rolling-element rolling grooves formed along the longitudinal direction; and a moving member assembled movably along the longitudinal direction between the walls, with respective load rolling-element rolling grooves corresponding to the rolling-element rolling grooves being formed in the moving members; and a screw shaft passed through a through-hole formed in the moving member, with a screw rolling-element rolling groove formed in the screw shaft, the screw rolling-element rolling groove being spiral in shape, wherein the moving member has the nut member attached to the through-hole, with the screw load rolling-element rolling groove corresponding to the screw rolling-element rolling groove formed in the nut, the nut member is assembled via a flange member which includes a lubricant supply device.

A rolling bearing arrangement is provided for a switching device for switching a manual transmission. The rolling bearing arrangement includes at least one rolling bearing having an outer shell, a cage axially displaceable in the outer shell, and a plurality of rolling elements guided by the cage and radially supported on the outer shell. A rod having a switch axis is supported rotatably and axially displaceably by the rolling elements. The rod has an axial stop for securing the cage in a form-fitting manner with vertically aligned rod in an upper position against a downward axial displacement.

A rolling bearing arrangement is provided for a switching device for switching a manual transmission. The rolling bearing arrangement includes at least one rolling bearing having an outer shell, a cage axially displaceable in the outer shell, and a plurality of rolling elements guided by the cage and radially supported on the outer shell. A rod having a switch axis is supported rotatably and axially displaceably by the rolling elements. The rod has an axial stop for securing the cage in a form-fitting manner with vertically aligned rod in an upper position against a downward axial displacement.

A lubricatable ball screw device includes a ball screw shaft, a ball nut slidably sleeved on the ball screw shaft and having oil guide holes, a linear bearing unit mounted between the ball screw shaft and the ball nut, a bearing ring rotatably sleeved on the ball nut and having an oil supplying hole, a positioning portion disposed between the bearing ring and the ball nut, and an oil passage corresponding to the oil supplying hole. The oil supplying hole, the oil passage, an oil storage space of the positioning portion and any one of the oil guide holes cooperatively form a continuous oil path.

A rolling bearing arrangement is provided for a switching device for switching a manual transmission. The rolling bearing arrangement includes at least one rolling bearing having an outer shell, a cage axially displaceable in the outer shell, and a plurality of rolling elements guided by the cage and radially supported on the outer shell. A rod having a switch axis is supported rotatably and axially displaceably by the rolling elements. The rod has an axial stop for securing the cage in a form-fitting manner with vertically aligned rod in an upper position against a downward axial displacement.

An actuator includes a track member provided with a base extending along a longitudinal direction and a pair of walls erected from opposite ends of the base in a width direction, with rolling-element rolling grooves formed along the longitudinal direction; and a moving member assembled movably along the longitudinal direction between the walls, with respective load rolling-element rolling grooves corresponding to the rolling-element rolling grooves being formed in the moving members; and a screw shaft passed through a through-hole formed in the moving member, with a screw rolling-element rolling groove formed in the screw shaft, the screw rolling-element rolling groove being spiral in shape, wherein the moving member has the nut member attached to the through-hole, with the screw load rolling-element rolling groove corresponding to the screw rolling-element rolling groove formed in the nut, the nut member is assembled via a flange member which includes a lubricant supply device.