Abstract: A drive apparatus, along with an XY drive apparatus on which it is equipped, is provided which, together with allowing highly accurate driving and positioning of a driven object by absorbing deflection in the radial direction of a nut, achieves reduced size of the apparatus and simplification of its structure.

Abstract: A spline bearing is described which contributes to reducing the size and cost of the apparatus, such as an industrial robot, in which it is incorporated, and moreover, has a high degree of reliability of relative positioning of a spline shaft and outer cylinder.The above-mentioned advantages are obtained by forming a detected portion along a track groove of the spline shaft, and providing a detection device which detects that detected portion on the outer cylinder.

Abstract: A small braking apparatus, which is able to completely and suddenly stop a moving portion such as a linear direct current motor at a desired location, is described, together with a drive unit equipped with the braking apparatus. The braking effect is obtained by providing a rotary member on a slider to move along a long guiding member, and providing a driving device which causes a braking member, which performs a braking action by engaging with said rotary member, to engage and move away from said rotary member.

Abstract: A direct current motor drive apparatus generating low levels of heat is described. A pulse width modulation signal, generated by a pulse width modulator corresponding to a torque command signal, is applied to a Hall effect element. The Hall effect element then generates an output corresponding to the number of lines of magnetic force of a field magnet on the moving side. After this output is amplified by an operational amplifier, waveform shaping is performed by first and second comparators. The resulting signals are then amplified by first and second power amplifiers and supplied to excitation coils.Since waveform shaping is performed on the signal applied to each of the power amplifiers mentioned above, the power amplifiers operate in a region of roughly complete switching, thereby suppressing the generation of heat.

Abstract: A linear encoder detects the position of relative motion of two objects by providing an electromagnetic conversion element on one of the objects opposing a magnetic circuit on the other object. The magnetic circuit is composed of a yoke in which a plurality of projections, each acting as a magnetic pole, are formed so as to be arranged in a row at prescribed intervals in the direction of relative motion of the two objects. A permanent magnet is joined to the yoke.

Abstract: A rolling guide unit in which the cross-section of a track rail is U-shaped wherein grinding processing of a track provided on the inside surface is facilitated. In addition, the thickness of the overall unit can be decreased by employing a self-traveling unit in which a motor is installed on a slider of a rolling guide unit. Grinding is facilitated by a split rail along one of the side walls of a track rail, and grinding can be performed with the split rail removed. In addition, since the entire outside surface of the side wall of the track rail can be used as a track for a rolling member, even if the track rail is flat, it is able to sufficiently transfer driving force, thereby allowing the thickness of the entire unit to be decreased.

Abstract: A linear motion rolling guide unit, together with allowing the rigidity of the overall unit to be increased in all directions when mounted on a frame, also attains a reduction in the dimension of height from the frame surface to the upper surface of the unit. This linear motion rolling guide unit offers the above advantages as a result of the points of intersection of matching lines of action of the force applied to rolling elements roughly coinciding with a plane that contains the mounting surfaces of a track rail for mounting that track rail to a frame.

Abstract: A ball screw that, together with contributing to reduction of the cost of the device wherein it is incorporated as a feed mechanism, eliminates the need for adjustment work performed to maintain the operation state of the object being operated, for example, an automatic door. The thread pitch of a threaded portion of a screw shaft is varied from one end to the other.

Abstract: The present invention relates to a compact guide unit and direct drive unit wherein, since plugs are arranged to cover the openings of insertion holes formed for insertion of fastening members in a track rail for one of either a detected element or detecting element that compose a position detection device for detecting the relative position of said track rail and a slider, the amount of space occupied by said position detection device can be made to be extremely small thereby allowing overall size of the unit to be reduced.

Abstract: The present invention provides a drive apparatus that is compact in size, low in cost, allows the attaining of a high degree of accuracy as well as high-speed driving, and suppresses the production of noise.The present invention is composed so that a drive roller rolls along a track rail as a result of providing a torque generation device on a slider guided by said track rail, and attaching the output shaft of said torque generation device to said drive roller.

Abstract: A direct current linear motor and direct drive unit that has a thin shape, is inexpensive and effectively dissipates heat from heat-generating electronic components.The above-mentioned advantages are obtained as a result of using a coil yoke as a circuit board by attaching electronic components and so on to said coil yoke equipped on a primary side.

Abstract: The present invention provides a drive apparatus comprising a track rail having a track formed along its axial direction, and a slider guided by the track. The slider has a rolling element circulating path, and a torque generating device, having an output shaft, is mounted on the slider. The apparatus also includes a plurality of drive rollers and at least one substantially spherical rolling element disposed in the rolling element circulating path. The torque generating device applies a torque to the drive rollers to cause the drive rollers to roll while engaging with the track rail to move the slider along the track, and the rolling elements contact the track rail and move along in the rolling element circulating path when the slider moves along the track. The apparatus further includes an oil film forming device which forms an oil film between the track rail and the drive rollers.

Abstract: A linear motion rolling contact guide unit includes a rail extending over a desired length, a slider slidably mounted on the rail and a plurality of rolling members interposed between the rail and the slider. The rail has a pair of first and second opposite side surfaces. A pair of oppositely inclined guide channels for rollers is provided between the first side surface of the rail and a corresponding opposite surface of the slider and another guide channel for balls is provided between the second side surface of the rail and a corresponding opposite surface of the slider.

Abstract: A drive apparatus that is compact in size, low in cost, allows the attaining of a high degree of accuracy as well as high-speed driving, suppresses noise, and obtains both large thrust and braking force. The present invention is able to obtain the above-mentioned advantages of compact size, reduction of costs, high accuracy, high-speed driving and suppression of noise as a result of providing a torque generation device on a slider guided by a track rail, attaching a drive roller to which is torque is applied by an output shaft of the torque generation device, and that drive roller rolling along the track rail. In addition, the above-mentioned advantages of large thrust and braking force are obtained by forming indentations in at least one of either the track rail or drive roller with respect to the other track rail or drive roller.

Abstract: The present invention provides a drive apparatus that is compact in size, low in cost, allows the attaining of a high degree of accuracy as well as high-speed driving, suppresses the production of noise, and demonstrates favorable ease of assembly when incorporating within machine tools and so on. The present invention is able to obtain the effects of reduction of costs, high accuracy and high-speed driving as a result providing a torque generation device on a slider guided by a track rail, attaching a drive roller to the output shaft of the torque generation device, and said drive roller rolling along the track rail. In addition, the above-mentioned effect of improved ease of assembly is obtained by attaching the torque generation device facing horizontally on the side of the slider.

Abstract: A linear pulse motor includes a primary side unit and a secondary side unit. The primary side unit includes a permanent magnet and at least two electromagnets, each formed with at least one projecting magnetic pole portion. One of the electromagnets is fixedly mounted on a table while the other electromagnet is slidably mounted on the table. The primary side unit also includes a spacing adjusting element, such as a piezoelectric element, interposed between the two electromagnets so as to adjust the spacing between the two electromagnets. The secondary side unit includes a plurality of inductor teeth arranged in a row at a predetermined pitch.

Abstract: A drive apparatus and a XY drive apparatus on which it is equipped that accomplishes highly accurate driving and positioning of a driven object by absorbing deflection of a nut in the radial direction while employing a simple construction.Deflection of a nut is absorbed by deflection of flexible portions as a result of said nut being supported by an intermediate member having said flexible portions able to deflect in a radial direction perpendicular to the shaft center of a feed screw.

Abstract: A drive apparatus, able to perform positioning of a driven object to be driven with a high degree of accuracy, sufficiently obtain the desired thrust even when using the low output of a driving source such as a motor, and allow the speed of movement of the driven object to be set as desired, is provided. This drive device, wherein a first belt-shaped member, to which driving force is applied with a driving source such as a motor, is engaged with a driven object to move said driven object, is equipped with a speed reduction function that functions by mounting a rotating body having a large diameter portion and a small diameter portion onto said driven object, engaging this large diameter portion with a belt-shaped member, stretching another belt-shaped member parallel to said belt-shaped member, engaging this belt-shaped member with the above-mentioned small diameter portion, and setting the ratio of the diameters of the above-mentioned large diameter and small diameter portions as desired.

Abstract: A linear motor drive unit includes a rail, a slider, a plurality of rolling members interposed between the rail and the slider to provide a rolling contact between the slider and the rail, a pair of permanent bar magnets fixedly attached to the rail to provide a fixed magnetic flux along the longitudinal axis of the rail and a moving coil mounted on the slider. The moving coil extends around the slider, and it encloses a part of the rail and also a part of the magnets in a circumferential direction with a predetermined gap therebetween. The current flow through the moving coil is controlled to control the movement of the slider relative to the rail.

Abstract: An X-Y drive apparatus includes an X drive unit mounted on a stationary base and a Y drive unit mounted on an X table of the X drive unit. The X drive unit includes a first motor operatively coupled to the X table and a second motor operatively coupled to a splined shaft. A worm gear is mounted on the splined shaft such that the worm gear may move along the splined shaft slidably, but it does not rotate around the splined shaft. The Y drive unit includes a Y table and a ball screw which is operatively coupled to the Y table and which has a worm wheel in mesh with the worm gear.