摘要:
There are provided a rail (10) in which a rolling member rolling surface (11) is formed along the longitudinal direction, a block (20) in which a loaded rolling member rolling surface (27) is formed in an opening (25) comprising a through hole, a plurality of balls (70) disposed and housed between the rolling member rolling surface (11) and the loaded rolling member rolling surface (27) which circulate according to the relative motion of the rail (10) and the block (20). A sectional shape at right angles to the longitudinal direction of the rail (10) and a sectional shape of the opening (25) are formed into a mutually geometrically similar longitudinal shape. The block (20) is a box type with high rigidity. A contact angle of the ball (70) can be optionally changed by changing the positions alone of the rolling member rolling surface 11 and the loaded rolling member rolling surface (27) to be machined on one type of the block (20) and the rail (10).
摘要:
A linear motor system for a driving apparatus comprises a first linear motor having a primary side to which either one of first and second movable elements which are relatively movable with respect to each other, and a secondary linear motor having a secondary side mounted to this one of first and second movable elements so as to extend in the relatively movable direction to be continuous to the primary side of the first linear motor. The second linear motor has a primary side mounted to another one of the first and second movable elements, and the first linear motor also has a secondary side mounted to the another one of the first and second movable elements so as to extend in the relatively movable direction to be continuous to the primary side of the second linear motor.
摘要:
A relative linear motion apparatus comprising: a first structure having at least a pair of inner wall surfaces opposing to each other; a second structure arranged between the pair of inner wall surfaces, the second structure being movable in linear motion relative to the first structure; at least two rectilinear guides arranged between the first structure and the second structure; and a displacement absorbing device arranged on at least one of the first structure and the second structure so as to allow at least one of the two rectilinear guides to move in a intersecting direction against the wall surfaces.
摘要:
A method of producing a screw device, having high productivity and capable of achieving sufficient strength of a nut. The method of producing a screw device has a groove forming step for previously forming a load ball rolling groove in a flat plate, which step is followed by a nut forming step for forming a nut by bending the flat plate into a ring. Since the method has, after the groove forming step in which the load rolling groove is formed in the flat plate, the nut forming step in which the flat plate is bent into a ring, sufficient strength of the nut can be easily achieved, and in addition, high compression stress is left in the load ball rolling groove in the inner diameter surface of the nut.
摘要:
A screw device manufacturing method ensures high productivity and adequate nut strength. The disclosed screw shaft manufacturing method includes: a groove forming step of forming a loaded ball rolling groove in a flat plate; and a nut forming step of bending the flat plate into a ring to form a nut. As the groove forming step of forming of the loaded ball rolling in the flat plate is followed by the nut forming step of bending the flat plate into a ring, sufficient strength of the nut can be easily achieved. Besides, a high compression stress is left in the loaded ball rolling groove in the inner surface of the nut.
摘要:
A ball screw device having a novel ball circulation structure suitable for a screw shaft with a large lead, optimum for downsizing and weight saving of a nut member, capable of being manufactured at low cost, and capable of exhibiting high reliability even under severe use conditions. In a ball screw device where a screw shaft and a nut member are screwed to each other through an intermediation of a large number of balls, a no-load ball path which forms an infinite circulation path for the balls is constituted by a no-load ball groove spirally formed in an inner peripheral surface of a through-hole of the nut member and by a pair of direction change grooves which communicatively couple a load rolling groove and the no-load ball groove to each other so as to complete the infinite circulation path as a closed loop.
摘要:
The present invention provides a roller connector rotatably retaining a plurality of rollers arranged in a line and capable of being incorporated into an endless roller-circulation path of an endless sliding type linear guide unit and it also provides an improved linear guide unit using such roller connector. The roller connector comprises a plurality of rollers arranged in a row with the axes of rotation of the rollers being held parallel with one another, a plurality of spacers interposed between a plurality of rollers and each provided with a pair of concave seats with which each of the rollers comes into sliding contact and an elongate flexible connecting portion adapted to connect the spacers together and characterized in that the connecting portion is connected to the spacers at a position at which the outer peripheral surface of each of the rollers is divided into two substantially equal parts in the axial direction and that the connecting portion is provided only one side of the line of rollers.
摘要:
A reciprocating device has a construction, in which a slider is formed by fixing a table member to a bearing casing which is movable inside a track bed having a C-shaped section in a longitudinal direction thereof, and a continuous drive is disposed along the track bed for reciprocating the slider. A weight and sizes of the device can be reduced, and reciprocating motion without a pitching motion can be achieved. Accordingly, the invention can prevent generation of uncomfortable noises during a movement of the slider, and also can prevent reduction of durability of the device which may be caused by irregular wear of a bearing for guiding the slider.
摘要:
A linear actuator unit has a slide plate which is allowed to freely move along the outer rail while causing a cover to retreat. The linear actuator unit includes: an outer rail, which is formed into a cylindrical shape, and includes the slit-opening portion formed along an axial direction thereof; the slide plate (3), which is coupled to an inner block in the hollow portion through the slit-opening portion; a cover belt, which is tensioned between both ends in a longitudinal direction of the outer rail so as to cover the slit-opening portion; a belt-guiding member, which separates the cover belt from the outer rail correspondingly to movement of the slide plate; and a seal member, which seals between the belt-guiding member and the cover belt and between the belt-guiding member and the outer rail.