Thk Co., Ltd.

Akihiro Teramachi

Takeki Shirai

Kaoru Hoshide

Hidekazu Michioka

Hiroshi Niwa

Hiroyuki Kimura

Yoshinobu Tanaka

Tetsuhiro Nishide

Toshiyuki Aso

Shinya Saito

Takuya Horie

Shiro Nakamura

Akimasa Yoshida

Takeshi Shimamura

Kentaro Nishimura

Tadashi Hirokawa

Hiroshi Kaneshige

Mitsumasa Wada

Ayako Miyajima

Masakazu Uesugi

Teruaki Ooka

Marie Horikawa

Kentaro Eto

Yuji Tachikake

Yuanjun Xu

Passenger car

A rolling guide device is capable of facilitating smooth circulation of rolling elements in an endless circulation path, and enhancing the accuracy of motion of a moving member relative to a track member. The moving member includes: a main body member having load rolling surfaces and return paths for the rolling elements; direction change pipes incorporating inner direction change paths and having inner peripheral guide surfaces of outer direction change paths, respectively; and lid members each being mounted on the main body member and having outer peripheral guide surfaces of the outer direction change paths. The main body member has position reference holes formed therein so as to serve as position references for the direction change pipes, respectively, whereas the direction change pipes have positioning protrusions formed thereon so as to be press-fitted into the position reference holes, respectively. Further, the direction change pipes include rotation restriction protruding portions.

Rolling guide device

A roller screw is provided having a structure suitable for circulating rollers. The roller screw has a screw shaftwith a spiral roller rolling grooveformed on an outer peripheral surface thereof; a nutwith a spiral roller rolling grooveopposed to the roller rolling groove of the screw shaft and formed on an inner peripheral surface thereof; and a plurality of rollersarranged in a load roller rolling pathbetween the roller rolling grooveof the screw shaftand the roller rolling grooveof the nut. Inside the nutis provided a roller return pathextending linearly in parallel with an axis line of the nut. To opposite end faces in an axis line direction of the nutare attached direction change path forming membersin which direction change pathsto connect the load roller rolling pathand the roller return pathare formed. The roller return pathis twisted to rotate an attitude of each of the rollerswhile the rollersmove in the roller return path

Roller screw

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.

Screw device manufacturing method and screw device

There is provided a roller screw comprising a screw shafthaving an outer peripheral surface in which a spiral roller rolling grooveis formed, a nut memberhaving an inner peripheral surface in which a spiral loaded roller rolling grooveis formed so as to oppose to the roller rolling groove of the screw shaft, a return pipein which a roller return passageis formed so as to connect one and another ends of a loaded roller rolling passagebetween the roller rolling grooveof the screw shaftand the loaded roller rolling grooveof the nut member, a number of rollersdisposed in the loaded roller rolling passageand the roller return passage, wherein the roller return passageis twisted so that an attitude of the rollerchanges as the roller moves in an axial direction of the return pipe. Such roller screw enables to provide an easy assembling and compact structure and to realize smooth circulation of the roller.

A track rail is formed in a channel-like configuration while having a guide passage for sliders. A table structure that moves within the guide passage includes: a pair of sliders that move forwards and backwards within the guide passage; and a connecting top board connecting those sliders to each other with a predetermined interval therebetween and provided with a mounting surface for a movable member. An armature constituting a linear motor is received between the pair of sliders, and field magnets constituting the linear motor are arranged in the track rail so as to face the guide passage. The armature and the field magnets, which constitute the linear motor, are completely integrated with the table structure and the track rail, which constitute a linear guide, and are entirely contained inside the linear guide.

Linear motor actuator

A wall-mounting structure allowing an object to be supported such as furniture or an electrical appliance to freely move on the wall surface and capable of preventing the aesthetic appearance of the wall surface from being impaired, including a mounting plate to which the object to be supported is fixed and slide support members for movably supporting the mounting plate on the wall surface, in which each of the slide support members is composed of a track rail which has a substantially rectangular section and ball rolling surfaces on the both side surfaces thereof, and moving blocks assembled with the track rail through a large number of balls.

Wall-mounting device

There are provided a rail () in which a rolling member rolling surface () is formed along the longitudinal direction, a block () in which a loaded rolling member rolling surface () is formed in an opening () comprising a through hole, a plurality of balls () disposed and housed between the rolling member rolling surface () and the loaded rolling member rolling surface () which circulate according to the relative motion of the rail () and the block (). A sectional shape at right angles to the longitudinal direction of the rail () and a sectional shape of the opening () are formed into a mutually geometrically similar longitudinal shape. The block () is a box type with high rigidity. A contact angle of the ball () can be optionally changed by changing the positions alone of the rolling member rolling surfaceand the loaded rolling member rolling surface () to be machined on one type of the block () and the rail ().

Rolling guide device and manufacturing method thereof, and driving device including the rolling guide device

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.

Linear motor system and driving apparatus driven by same

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.

Growing community of inventors

Tokyo, Japan

Akihiro Teramachi