Abstract: A linear motion guide unit includes a pair of guide members each formed with a guide groove and provided to be relatively movable parallel with a longitudinal axis of the unit. A plurality of rolling members are provided in rolling contact with the guide grooves of the guide members. A retainer assembly, including a retainer plate formed with a plurality of windows and at least one grooved wheel mounted at one end of the retainer plate, is disposed in a space defined between the guide grooves. A wire is passed around the grooved wheel and fixedly attached to the guide members. The total length of the retainer assembly is shorter than either of the guide members.

Abstract: A linear motion guide unit includes a pair of guide members each formed with a guide groove and provided to be relatively movable parallel with a longitudinal axis of the unit. A plurality of rolling members are provided in rolling contact with the guide grooves of the guide members. A retainer assembly, including a retainer plate formed with a plurality of windows and at least one grooved wheel mounted at one end of the retainer plate, is disposed in a space defined between the guide grooves. A wire is passed around the grooved wheel and fixedly attached to the guide members. The total length of the retainer assembly is shorter than either of the guide members.

Abstract: A linear motion rolling contact guide unit generally includes a rail, a slider and a plurality of rolling members interposed between the rail and the slider. The rail is elongated in shape and generally U-shaped in cross section. The rail is provided with at least one slot for releasing a stress which may be produced when the rail is subjected to heat treatment during its manufacture.

Abstract: A small-sized linear motion guide assembly includes a bed having a U-shaped cross section, a sliding table having a U-shaped cross section and a plurality of rolling members interposed between the bed and the sliding table to thereby provide a relative motion between the bed and the sliding table. A drive pulley is provided at one end of the bed and an idle pulley is provided at the other end with an endless timing belt extended between the drive and idle pulleys. The drive pulley is operatively coupled to a stepping motor so that when the motor is driven, the sliding table is caused to move relative to the bed.

Abstract: There is provided a thin finite linear motion rolling guide unit having an apparatus for preventing a positional deviation of a holder. The guide unit comprises a U-shaped bed member, an inverse U-shaped table member, and a M-shaped holder sandwiched between the bed member and the table member. Holding holes are formed horizontally in a line at regular intervals in a pair of outside opposite walls so as to rotatably hold the balls between the opposite track grooves formed on the bed member and the table member. Circular holes are formed in the central portions in the lognitudinal direction of the inside opposite walls of the holder. A pin is pressure inserted and fixed into the holes. A single type inside belt and a double-single type outside belt are wrapped to the central portion of the pin by a half rotation in the opposite directions so that the outside belt comes into contact with outer edges of the inside belt.

Abstract: The present invention provides a finite linear motion rolling guide unit comprising: a track member; and a link mechanism for holding ball rolling members which is arranged between vertically depending track portions of a sliding member which rides over the track member through the ball rolling members so as to be finitely linearly slidable. The link mechanism is simply constructed by two or more link arm members. In the relative reciprocating motion at any speed of the track member and the sliding member, a deviation movement thereof from the normal position of the ball linear moving members is prevented and, at the same time, the smooth and stable linear motion rolling guiding operation of the balls is assured.

Abstract: A thin-walled rectilinear motion rolling guide unit comprising a bed member, a table member slidably movable relative to said bed member in the longitudinal direction, and a ball retainer interposed between said two members.According to the present invention, a rack and pinion mechanism is provided between said table member and ball retainer, with the use of a different teeth-meshing ratio between the table member and the ball retainer such that the speed in rectilinear motion of the former is greater than that of the latter such as a value of 2:1 for example, so that by decreasing the relative velocity of the ball retainer with the table member, the displacement of the former with the latter in operation can be prevented under any stress applied vertically onto the unit, insuring a high precision operation with less sliding resistance.

Abstract: A linear motion rolling contact bearing assembly includes a rail having a U-shaped transverse cross section and a pair of guide grooves defined on the opposite side walls of the rail and a slider which is received in the U-shaped rail to travel along the rail. The slider is preferably provided with a pair of endless circulation paths located side-by-side each of which is provided with a plurality of rolling members. A part of each of the endless circulation paths is defined as a load path section which is located opposite to the corresponding one of the pair of guide grooves and where the plurality of rolling members are partly exposed to come into engagement with the pair of guide grooves of the rail to provide a rolling contact between the slider and the rail. The slider is also provided with a feed-in port for each of the pair of endless circulation paths, and thus the rolling members may be fed into the endless circulation paths through the feed-in ports.

Abstract: There is provided a thin linear motion rolling guide unit comprising: a rail made of a long member having a U-shaped cross section in which first track grooves are respectively formed on the inside surfaces of both side walls in the longitudinal direction of the long member; a table which is slidably combined with the rail and has a pair of track members, second track grooves being formed on the outside surfaces of the track members at the positions which face the first track grooves of the rail and endless circulating passages for balls being also formed by the track members; the balls which are inserted between the first track groove of the rail and the second track groove of the table which faces the rail; flat plate shaped upper and lower lids attached in the upper and lower portions of the table so as to sandwich the track members which are symmetrically arranged with respect to an axial direction of the table; the track members forming loop inside wall surfaces of the endless circulating passages for th

Abstract: A linear motion rolling contact guide unit assembly includes a U-shaped guide rail which extends straight over a desired length and which is formed with a pair of guide grooves. The assembly also includes a slider unit which is mounted in the guide rail so as to be movable relative to the guide rail along a longitudinal axis of the rail. The slider unit is formed with a pair of endless circulation paths each of which includes a load path section, a return path section and a pair of connecting path sections which connect the corresponding ends of the load and return path sections. A plurality of rolling members are provided in each of the endless circulation paths. A window is formed in the side of the slider unit at the load path section and the rolling members are partly exposed at the load path section and partly received in the corresponding guide groove of the guide rail.

Abstract: A holding device of a rectilinear motion rolling guide unit comprises: a long rail; first track grooves formed on both side wall surfaces in the longitudinal direction of the rail; a saddle-shaped slide unit formed with an inner concave portion and slidably mounted on the rail; second track grooves formed on the surface of the inner concave portion at the positions opposite to the first track grooves; and balls inserted between the first and second track grooves, thereby enabling the slide unit to be slidably moved on the rail therealong through the rolling of the balls. A holding portion to hold the balls is formed at the edge surface on the bottom surface side of the inner concave portion of each second track groove so as to be projected to the side of the rail by exceeding a perpendicular passing through the center of the ball.

Abstract: A sheet metal-type endless rectilinear motion rolling guide unit is provided, which unlike the prior art like unit, the structure is simple and compact, yet giving rise to high load resisting capacity and less slide resistance with markedly prolonged operation life. Such an advantage is derived from the employment of ball circulation passageforming spacer member to be assembled with the sliding table, which has a unique configuration and construction.

Abstract: A mounting structure for mounting a linear motion rolling contact bearing assembly using a bolt extending through a mounting hole provided in a guide rail and/or a slider member of the bearing assembly includes a mounting area which is defined by a slit, an outwardly projecting stepped section or a combination thereof so as to confine any deformation or error in size therein and prevent it from being transmitted to other sections when the bolt is tightened for fixedly mounting the bearing assembly to a supporting member.

Abstract: A linear motion rolling contact bearing assembly including a rail, a slider and a plurality of rolling members interposed between the rail and the slider for providing a rolling contact therebetween is provided. The rail includes a bottom wall and a pair of side walls extending upward from the opposite sides of the bottom wall, so that the rail has a U-shaped cross section. The slider includes a frame which is comprised of a top wall and a pair of side walls depending from the opposite sides of the top wall, so that the frame has a U-shaped cross section. Each of the side walls is provided with a guide groove so that the rolling members are interposed between the rail and the slider as partly fitted in a pair of associated guide grooves.

Abstract: There is a track groove of a ball bearing for a rectilinear motion comprising a track member, a slide member arranged to sandwich the track member and adapted to be rectilinearly slidable along the track member, track grooves formed in both side portions of the track member and of the slide members so as to face one another, and a number of balls rotatably inserted between the track grooves which face each other. The contact portion of the track groove with the ball is formed by two or more kinds of arcs having different radii. The ball comes into contact with a single arc under a light load and with a plurality of arcs under a heavy load. The radius of the arc near the contact center with the ball may be slightly larger than the radius of the ball and the other arcs may be larger than the central arc. Or, the large arc may be formed at a location near the contact center with the ball and the arcs smaller than this central arc may be formed at locations other than the contact center.

Abstract: A linear motion rolling-contact bearing assembly includes a trough-shaped rail extending straight over a length and provided with outer guide grooves, a slider member provided with inner guide grooves each opposite to the corresponding one of the outer guide grooves and including an endless circulating path comprised of a load path section and non-load path section, a plurality of balls arranged in the endless circulating path which are brought into rolling contact with the corresponding pair of the inner and outer guide grooves at the load path section, and a retainer plate for retaining the balls in the endless circulating path while rolling along its load section. In accordance with the present invention, the slider member, received in the rail, includes a saddle-shaped table and a pair of upper and lower wall sections, which define therein at least the non-load path section of the endless circulating path and which are fixedly attached to the table by a fixing means, such as rivets.

Abstract: A cross roller bearing includes an inner ring, an outer ring and a plurality of generally cylindrically shaped rollers placed in a channel defined between the inner and outer rings as being alternately crossed with any two adjacent rollers having their axes of rotation directed perpendicular to each other. Both of the inner and outer rings are unitary in structure. In one form of the invention, the outer ring is provided with a radial hole extending therethrough radially, through which the rollers may be inserted in the channel defined between the inner and outer rings. An insert is also provided to be fixedly fitted into the radial hole so as to close the radial hole after insertion of the rollers into the channel.

Abstract: A ball-circulated ball bearing assembly for infinite linear motion includes a track or guide rail extending straight and provided with a pair of guide grooves and a table sub-assembly which is provided with a pair of endless circulating paths, along each of which a plurality of balls are moved in circulation, thereby allowing the table sub-assembly to move along the guide rail however long it may be. In the preferred embodiment, the table sub-assembly includes a table, a three-part block member defining part of the endless circulating path, a retainer for retaining the block member to the table and a plurality of balls located in the endless circulating path. The retainer is preferably comprised of a shaped plate having a generally U-shaped cross section and having a pair of inwardly curved top edges which come into engagement with the table when assembled to keep the entire table sub-assembly resiliently integrated.

Abstract: A roller bearing for linear movement of the type wherein the rollers circulate endlessly is provided. A direction changing path is provided in the shape of a circular curve reversing relative to the direction of movement of the bearing, a connecting load track and return hole at each end, for circulating the rollers. The shape of such direction changing path is obtained in such a manner that the projection of the path onto a plane perpendicular to the direction of movement of the bearing is also a circular curve. As a result, width and height of the bearing unit are made optimum so as to achieve an overall most compact bearing unit. Also a preload device and grease are arranged. The compact endless linear movement roller bearing thus obtained is made without any decrease in the bearing load capacity of prior art apparatus the same size.

Abstract: A linear motion guide unit includes a pair of guide members each formed with a guide groove and provided to be relatively movable parallel with a longitudinal axis of the unit. A plurality of rolling members are provided in rolling contact with the guide grooves of the guide members. A retainer assembly, including a retainer plate formed with a plurality of windows and at least one grooved wheel mounted at one end of the retainer plate, is disposed in a space defined between the guide grooves. A wire is passed around the grooved wheel and fixedly attached to the guide members. The total length of the retainer assembly is shorter than either of the guide members.