Nippon Thompson Co., Ltd.

Isao Ochiai

Yoshitaka Ogawa

Takehiko Hara

Osamu Satou

The track roller bearing with stud according to the present invention is to provide a track roller bearing with stud that has a low production cost and offers easy handling in which lubrication work can be performed from either end surface of the stud and can be easily attached and removed from a machine tool and so forth. Lubricant supply port 21m continuing from the above hexagonal hole 21j is formed in addition to lubricant supply port 21n on the side of threaded portion 21e of stud 21 for the lubricant supply ports connected to lubricating paths 21g and 21h for supplying lubricant to rolling elements 24 and so forth, and lubricant supply plugs 31 are disposed in these lubricant supply ports.

Track roller bearing with stud

An object is to provide a small-sized track roller bearing with stud in which the lubrication feed can be performed after the bearing has been incorporated in a device or the like. In the end surface of a stud 1, a hexagon socket 1r to which a fastening tool can be engaged, is formed, and the hexagon socket 1r and a supply hole 1g of a lubricating passage are connected to each other, and in the hexagon socket 1r, an lubrication plug with an empty hole portion into which a pointed tip of a lubricating device such as an injector can be inserted so as to feed lubrication, is installed.

Track roller bearing with stud and lubrication plug

This ball spline consists of a spline shaft provided with first raceway grooves, and a cylindrical casing mounted on the spline shaft so that the cylindrical casing can be moved slidingly on and relatively to the spline shaft. The cylindrical casing has a cylindrical casing body, end caps fixed to both ends of the cylindrical casing body, end seals attached to end surfaces of the end caps, and balls rolling between the spline shaft and cylindrical casing body. The cylindrical casing body consisting of a cylindrical casing member provided with return passages and formed out of a metal or synthetic resin material, and a liner member fitted in the cylindrical casing member and provided with second raceway grooves in which the balls roll.

Ball spline with liner member

The under seal of this linear rolling guide unit comprises a pair of L-shaped under seal members that are bent and engaged together. The under seal members can be positioned relative to each other by engaging the engagement projections and the engagement recesses. Because the under seal members can be moved relative to each other in the longitudinal direction, if there are dimensional errors in the overall length of the slider in the longitudinal direction, they can be offset by adjusting the overall length of the under seal. In this way, the elongation and contraction due to thermal expansion and external forces are accommodated. The under seal is secured to the end surfaces of the end caps, not the underside of the slider, so that even when the dimension H.sub.1 between the base on which the track rail is installed and the slider's underside is small, the under seal can be easily and firmly fixed.

Growing community of inventors

Gifu, Japan

Isao Ochiai