Sliding device

摘要

A covering is easily mounted and/or demounted to envelop an overall sliding device with onboard moving-magnet linear motor. The covering helps improved propulsion, high velocity and response of a table even with small in dimension, compact in construction. End blocks are installed in opposite ends of a bed and a linear motor is placed between the bed and the table. The end blocks are made in solid bodies which are tightened to the bed together with a coil board. The end blocks have butting surfaces which can come into abutment against the ends of the table to protect the table from getting out of the bed. The end blocks have locking recesses which mate with locking jaws on the covering to fasten the covering to the end blocks.

主权项

1. A sliding device with a top surface and a bottom surface of an overall flat configuration, comprising:
a plate-like bed of quadrilateral shape, a quadrilateral plate-like table movable for reciprocation relative to the bed through a pair of linear motion guide units mounted on lengthwise side edges of the bed, and a moving-magnet linear motor built in between the table and the bed to extend lengthwise between the linear motion guide units and composed of a field magnet array and an armature assembly lying in opposition to the field magnet array; wherein the bed has a lengthwise recess extending in a moving direction of the table, an armature assembly comprising a coil board, the armature assembly fitting into the recess such that the coil board is disposed in contact with a bottom surface of the recess, and end blocks fit into the recess at the lengthwise opposite ends of the bed in adjacency to lengthwise opposite ends of the armature assembly, wherein a covering is mounted to the end blocks installed on lengthwise opposite ends of the bed, the covering being composed of a ceiling part having an opening in opposition to an upper surface of the table and enveloping from above the sliding device around the opening, and a peripheral part extending downwards from the ceiling part to surround around the lengthwise side edges and the lengthwise opposite ends of the bed; wherein an auxiliary table smaller in size than the table is fastened to the upper surface of the table through the opening in the covering, a member such as a work being mounted on the auxiliary table to be controlled in position, wherein the auxiliary table has a rectangular shape and is secured to a lengthwise middle of the table, a length of the auxiliary table in a moving direction being less than a length of the table subtracted by twice a stroke distance of the table, and wherein the opening in the covering is formed in a rectangular contour of a dimension which conceals lengthwise opposite ends of the table from view after the table has moved within a movable range, and wherein the end blocks each are a solid body defined with a top surface, widthwise opposite side surfaces and an outward rear surface to keep the covering in place, and the outward rear surface having thereon a locking recess, and the covering on interior end surfaces thereof has locking jaws extended above the interior end surfaces in opposition to the locking recesses of the end blocks, so that the locking jaws snap-fittingly engage with the locking recesses on the end blocks after the peripheral part around the locking jaws have suffered partially an elastic deformation.