A linear guide apparatus may include a guide rail, a carriage block, at least two recirculating tubes, and two end covers. The carriage block has an axial sliding channel formed at a middle portion of a bottom surface thereof, and the carriage block is slidably coupled on the guide rail through the sliding channel. Each of two sides of the sliding channel has at least a sliding groove formed between the carriage block and guide rail. Each sliding groove comprises a plurality of rolling balls installed therein so as to enable the carriage block to slide forward and backward on the guide rail. Each of the sliding grooves is cooperated with a recirculating channel axially penetrating through the carriage block. Each of the recirculating tubes comprises a plurality of spiral threads to enable the rolling balls to have lateral roll at a specific angle when passing therethrough.

A motion guide device includes: a track member including a rolling member rolling surface; a movable member including a loaded rolling member rolling surface, and a rolling member return passage; a pair of cap members including a direction change passage connecting the loaded rolling member rolling surface and the rolling member return passage; and a plurality of rolling members arrayed in a rollable manner on a loaded rolling member rolling passage, the rolling member return passage, and a pair of the direction change passages, the loaded rolling member rolling passage being made up of the rolling member rolling surface and the loaded rolling member rolling surface. A gap between the rolling member and the direction change passage at a boundary portion X is formed so as to become smaller than a gap between the rolling member and the rolling member rolling surface at the boundary portion.

Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision. In this linear motion device, a linearly moving element 2 that moves linearly relative to a rail element 1 is provided, load paths 4 through which rolling elements 3 move are provided between the rail element 1 and the linearly moving element 2, and endless rolling element circulation paths are formed in which the load paths 4 are made to communicate via return paths 5 with no-load paths 6, wherein the rolling elements 3 are cylinders of which the length is at least three times the diameter, the rolling elements 3 are configured so as to circulate through the endless rolling element circulation paths while being rotatably held by rolling element holders 10 configured by spacers 8 provided between adjacent rolling elements 3 and belt-shaped linking elements 9 that link spacers 8 together at both ends, the no-load paths 6 are formed by placing no-load path-constituting members 12 in linear holes 11 formed in the linearly moving element 2, and the no-load path-constituting members 12 are configured such that the end surfaces of the rolling elements 3 are opened on the outward sides and the linking elements 9 of the rolling element holders 10 are exposed.

A linear guideway is characterized in that it is capable of determining whether there is abnormal displacement of the return member based on the open or close of the circuit, and can output the abnormal signal immediately when the circuit is open. Compared with the conventional structure, since the present invention can be disposed only at one end of the slide block, both the number of components and assembly time can be reduced, and the diagnosis with precision and immediacy can be performed without high-deep algorithm, which can play a role of instant reminding before the linear guideway completely loses function. Therefore, the service life of the linear guideway can be known early to avoid the loss caused by the shutdown.

A micro linear slide rail assembly and a slider are disclosed. The slider straddles a slide rail. A rolling member is disposed between the slide rail and the slider. The slider is linearly displaced on the slide rail by rolling of the rolling member. The slider includes a main body, a frame coupled to the main body, and two end caps connected to two opposite ends of the main body. The slider has a first unloaded track surface. The first unloaded track surface surrounds an accommodating area. A first engaging portion extends from a lower edge of the accommodating area. The frame has a second unloaded track surface. The frame is mounted to the main body through a second engaging portion to be engaged with the first engaging portion. The first unloaded track surface and the second unloaded track surface are combined to form an unloaded path.

Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision. In this linear motion device, a linearly moving element 2 that moves linearly relative to a rail element 1 is provided, load paths 4 through which rolling elements 3 move are provided between the rail element 1 and the linearly moving element 2, and endless rolling element circulation paths are formed in which the load paths 4 are made to communicate via return paths 5 with no-load paths 6, wherein the rolling elements 3 are cylinders of which the length is at least three times the diameter, the rolling elements 3 are configured so as to circulate through the endless rolling element circulation paths while being rotatably held by rolling element holders 10 configured by spacers 8 provided between adjacent rolling elements 3 and belt-shaped linking elements 9 that link spacers 8 together at both ends, the no-load paths 6 are formed by placing no-load path-constituting members 12 in linear holes 11 formed in the linearly moving element 2, and the no-load path-constituting members 12 are configured such that the end surfaces of the rolling elements 3 are opened on the outward sides and the linking elements 9 of the rolling element holders 10 are exposed.

A rolling device includes: an inner member that has a raceway face; an outer member that has a raceway face facing the raceway face; and rolling elements that are disposed between both raceway faces in a rollable manner, wherein at least one of the inner member and the outer member has a space formed therein. Further, a method for manufacturing a rolling device including an inner member that has a raceway face, an outer member that has a raceway face facing the raceway face, rolling elements that are disposed between both raceway faces in a rollable manner, and a space that is formed inside at least one of the inner member and the outer member by a 3D printer.

A linear motion guide unit restrains fluctuations in sliding friction and generation of heat by correcting the postures of rollers having been inclined in a no-load area such that their axes become orthogonal to a guide surface of a carriage to thereby introduce the rollers in proper postures into a load area. A retainer plate of the guide unit has a guide surface for guiding end surfaces of the rollers and has protrusions protruding from the guide surface at its opposite end portions facing crownings of the carriage. The rollers rolling from a turnaround passage to a load-carrying race are pressed by the protrusions toward the guide surface of the carriage so as to be arrayed in such a posture that the axes of the rollers become orthogonal to the guide surface on the inlet side of the crowning of the carriage, whereby the occurrence of roller skew is prevented.

This rolling device 10 includes an inner member 11 provided with a rolling element rolling groove 11a, and an outer member 21 attached to the inner member 11 to be relatively movable via a plurality of rolling elements 12. The outer member 21 includes an outer member main body portion 22 including a loaded rolling element rolling groove 25 forming a loaded rolling element rolling raceway in cooperation with the rolling element rolling groove 11a and a non-loaded rolling element rolling raceway 33 arranged to correspond to the loaded rolling element rolling groove 25, and a pair of lids 24 attached to both end surfaces of the outer member main body portion 22 in a relatively-moving direction and having at least a part of a direction changing raceway 35 connecting one end of the loaded rolling element rolling raceway to one end of the non-loaded rolling element rolling raceway 33. Each of the lids 24 is provided with a projection portion 24b including at least the part of the direction changing raceway 35. Also, the projection portion 24b is provided with a lubricant supply path 38. With this configuration, this rolling device 10 can circulate the plurality of rolling elements smoothly in an endless circulation raceway.

The present application relates to a field of bearing technology and relates to a recirculating roller bearing, including a front cover plate, a rear cover plate, an inner supporter, a sealing covering and a plurality of rolling carriers and at least one connector, in which the front cover plate and the rear cover plate are detachable connected on two sides of the inner supporter respectively; a circulating guiding path is defined by the front cover plate, the rear cover plate, the inner supporter and the sealing covering, the circulating guiding path includes a sealing portion and an opened load-bearing portion; the rolling carriers are filled in the circulating guiding path, each of the rolling carriers forms a rolling fit with the inner supporter, and each of the rolling carrier forms a rolling fit with a retractable fork when passing the opened load-bearing portion of the circulating guiding path.