Provided is a sensor mounting structure for a rolling guide device, which enables easy mounting and removal of a sensor of a type among various types with respect to the track rail, the sensor mounting structure including: a sensor holder to be fixed to an end surface of the track rail in a longitudinal direction of the track rail; and a sensor casing to be held on the track rail by the sensor holder, the sensor holder including: a base plate to be fixed to the end surface of the track rail, and a holding plate having one end continuous with the base plate as a fixed end, and another end formed as a free end elastically deformable with respect to the base plate, the holding plate being configured to urge the sensor casing toward the end surface of the track rail by the free end.

A linear motion device includes a guiding member extending along a first direction and a slide block assembly slidably disposed on the guiding member. The slide block assembly includes a slide block, two ball race members at two sides of the slide block, two circulation members at two sides of the slide block along the first direction, and two end covers assembled on the circulation members. One or more of the circulation members has two revolve channel members. The revolve channel member has an upper protrusion member and a lower protrusion member protruding out of the upper protrusion member. Since the protruding portion of the lower protrusion member can be served as the bottom surface of the revolve curve, stepped structures caused by assembling or component tolerances are not formed between the bottom surface and nearby portions, and the balls can roll stably in the linear motion device.

A lifespan diagnosis device for a motion guidance device including: a stress calculating means which calculates stresses during movement for each of virtual segments, the stresses during movement being stresses that occur in each segment during a movement of the moving member; a counting means which counts, for each of the segments, on the basis of the amount of displacement, the number of occurrences of the stresses during movement which repetitively occur with waving during a movement of the moving member along the track; and a diagnostic means which calculates, for each of the segments, a lifespan exhaustion ratio on the basis of magnitudes of the stresses during movement and the number of occurrences of the stresses during movement, and which diagnoses the lifespan of the motion guidance device on the basis of the calculated lifespan exhaustion ratios of the respective segments.

A linear guide mechanism includes an actuator side guide member, moving block side guide members disposed on both sides of the actuator side guide member, and a plurality of balls disposed in two rows, respectively, between the actuator side guide member and each of the moving block side guide members. Set screws that are capable of adjusting a pre-loading of the balls and are capable of improving the straightness of the moving block side guide members, are attached to a moving block.

A motion guide apparatus which prevents a retainer from falling-off. A motion guide apparatus includes a track member having a rolling element rolling portion; a movable member having a loaded rolling element rolling portion facing the rolling element rolling portion of the track member; a return path; and a turn-around path connected to a loaded path and the return path; a plurality of rolling elements placed in the loaded path, the return path, and the turn-around path; and a retainer configured to hold at least one of the plurality of rolling elements. Grooves into which an end of the retainer in a width direction thereof enters are formed in the loaded path, the return path, and the turn-around path. A width of the grooves in at least a part of the turn-around path and/or in the return path is greater than a width of the groove in the loaded path.

A motion guide apparatus which prevents a retainer from falling-off. A motion guide apparatus includes a track member having a rolling element rolling portion; a movable member having a loaded rolling element rolling portion facing the rolling element rolling portion of the track member; a return path; and a turn-around path connected to a loaded path and the return path; a plurality of rolling elements placed in the loaded path, the return path, and the turn-around path; and a retainer configured to hold at least one of the plurality of rolling elements. Grooves into which an end of the retainer in a width direction thereof enters are formed in the loaded path, the return path, and the turn-around path. A width of the grooves in at least a part of the turn-around path and/or in the return path is greater than a width of the groove in the loaded path.

A linear motion guide unit includes a rail, a slider slidable relative to the rail, and rolling elements rollable in a rolling groove formed with the rail and the slider. The slider has a lubricating oil supply device provided at least at one end face thereof. The lubricating oil supply device includes a lubricating member that retains lubricating oil and abuts against a raceway surface of the rail to supply the lubricating oil to the rail, a housing having front, rear, and bottom surfaces covering front, rear, and bottom surfaces of the lubricating member, with an upper surface of the housing being left open, and a cover that covers at least an upper surface of the lubricating member. The housing is fixed to the slider with a first fixing member. The cover is fixed to the housing with a second fixing member, without being fixed with the first fixing member.

A linear motion guide unit includes a rail, a slider slidable relative to the rail, and rolling elements rollable in a rolling groove formed with the rail and the slider. The slider has a lubricating oil supply device provided at least at one end face thereof. The lubricating oil supply device includes a lubricating member that retains lubricating oil and abuts against a raceway surface of the rail to supply the lubricating oil to the rail, a housing having front, rear, and bottom surfaces covering front, rear, and bottom surfaces of the lubricating member, with an upper surface of the housing being left open, and a cover that covers at least an upper surface of the lubricating member. The housing is fixed to the slider with a first fixing member. The cover is fixed to the housing with a second fixing member, without being fixed with the first fixing member.

This hollow shaft member 10 includes paired diameter-reduced sections 11 respectively formed at both shaft ends of a hollow shaft-like tubular material by performing swaging processing on both the shaft ends, and an intermediate section 12 located between the paired diameter-reduced sections, and having an outer diameter larger than an outer diameter of the paired diameter-reduced sections. Shapes of connection boundaries between the intermediate section 12 and the diameter-reduced sections 11 are formed as perpendicular step-shaped sections 13 stepped substantially perpendicular to an axial direction, and the perpendicular step-shaped sections 13 are formed by the swaging processing. With such a configuration, a hollow shaft member for a rolling device in which a weight reduction has been achieved can be provided.

This hollow shaft member 10 includes paired diameter-reduced sections 11 respectively formed at both shaft ends of a hollow shaft-like tubular material by performing swaging processing on both the shaft ends, and an intermediate section 12 located between the paired diameter-reduced sections, and having an outer diameter larger than an outer diameter of the paired diameter-reduced sections. Shapes of connection boundaries between the intermediate section 12 and the diameter-reduced sections 11 are formed as perpendicular step-shaped sections 13 stepped substantially perpendicular to an axial direction, and the perpendicular step-shaped sections 13 are formed by the swaging processing. With such a configuration, a hollow shaft member for a rolling device in which a weight reduction has been achieved can be provided.