Nsk Corporation

Nsk Precision Co., Ltd.

Masaru Akiyama

Soichiro Kato

Nobuhide Kurachi

Jun Matsumoto

Shiroji Yabe

Kunio Kawashima

Shinya Nakamura

Xu Wei

Hidenori Kawai

Toshio Yoshida

Toshiaki Yamaguchi

Wei Xu

A slider has a slider main body which has a circulation sleeve whose inner portion forms a rolling element passage by being inserted into a hole penetrating in an axial direction, an end cap which has an outer peripheral track face of a direction changing passage in a curved shape for communicating a load track between two rolling element rolling grooves and the rolling element passage, and is fixed to an axial end portion of the slider main body, and an inner peripheral track member which has an inner peripheral track face of the direction changing passage, and is fitted to the end cap. An end portion of the circulation sleeve is provided with a plurality of positioning projected portions, and the end cap and the inner peripheral track member are provided with recess portions fitted with the positioning projected portions.

Linear guide

A linear guide device has a retaining piece () between two adjacent rollers (). The retaining piece () has a retaining piece body () having left side-face section and a right side-face section that are parallel to the end face sections of the rollers (), a first arm section () extending from the left side-face section of the retaining piece body () toward the end face sections of the two adjacent rollers () and fitting in a first guide groove () formed in one wall surface section of a circulation path (), and a second arm section () provided on the right side-face section of the retaining piece body () so as to be parallel to the first arm section () and fitting in a second guide groove () formed in the other wall surface section of the circulation path (). The heights of the retaining piece body () and the arm sections () satisfy the conditional expression of (H&#x2212;H)/2&#x3c;(Dw&#x2212;W)/2, where His the height of the retaining piece body (), in the direction perpendicular to the axial direction of a roller; Hthe height of the arm sections () in the direction perpendicular to the axial direction of the roller; W the width of the guide grooves () in the direction perpendicular to the axial direction of the roller; and Dw the diameter of the roller ().

Linear guide device

A linear guide device has a guide rail, a slider body, an end cap, a large number of rolling bodies, and separators. The slider bodyhas a slider side rolling body raceway surface opposed to a rail side rolling body raceway surfaceformed on the guide rail. The end caphas a rolling body direction switching pathcommunicating with a rolling body load rolling pathformed between both rolling body raceway surfaces of the guide railand the slider bodyand also communicating with a rolling body return pathformed in a penetrating manner in the slider body, along the longitudinal direction of the guide rail. In conjunction with relative linear movement of a sliderconstituted of the slider bodyand the end cap, the rolling bodiesroll in the rolling body load rolling path, the rolling body return path, and a rolling body direction switching path. The separatorsare arranged between every two adjacent rolling bodies. The end caphas a throughholefor assembling the rolling bodiesand the separatorsfrom the outside of the sliderinto the rolling body return pathand also has a cap memberremovably fitted in the through-hole. The cap memberforms part of the rolling body direction switching path

A separator for use in a linear guide apparatus including a guide rail, a slider, and a plurality of rollers which circulate along an endless circulation passage provided in the guide rail and the slider and having guide grooves. The separator includes a separator body interposed between the rollers and having a pair of roller contact surfaces respectively opposing outer peripheral surfaces of the adjacent rollers, and a pair of arm portions which are guided by the guide grooves. A surface of each of the arm portions opposing the guide groove is formed such that an opposition distance with respect to the guide groove becomes wider from a fixed end side of the arm portion toward a free end thereof.

Separator and linear guide apparatus

A linear guide apparatus is provided with two (upper and lower) tracks of rolling element race tracks formed on a guide rail and of rolling element race tracks formed on a slider main body so as to oppose the rolling element race tracks on the respective sides, i.e., four tracks of race tracks in total. A recess is provided below the lower rolling element race track on the slider main body and the end cap fixed to an end face of the slider main body is provided with a projection that engages with the recess so as to determine a position of the end cap.

Linear guide apparatus

Rolling element holding members have two holding window for holding rolling elements in rolling element running channels formed between both track faces of a rail and a slider. Further, the rolling element holding members are held between two end caps fixed opposite end surfaces of the slider by engagement of four retaining grooves formed on the end caps and opposite end portions of the rolling element holding members.

A friction applying apparatus and a linear guide apparatus having the same, according to the present invention can uniformly contact allover contacting faces of sliding members to the contacted members so as to reduce abrasion in the sliding members and the contacted members, and may maintain appropriate frictional force and precision. In the friction applying apparatus forcing the sliding members moving along guide rails for generating friction, the sliding member is made of a material having elastic modulus being 5000 MPa or less and Vickers hardness being 400 or more.

Friction applying apparatus and linear guide apparatus having the same

A linear guide bearing apparatusincludes a guide railand a sliderriding over the guide railmovably relative thereto, the sliderincludes a slider main bodyand end capsrespectively joined to both end faces in an axial direction of the slider main body, and the end capincludes an end cap main bodyformed with a middle guide faceand an outer peripheral guide faceof an inner side direction change pathas well as an inner peripheral guide faceand a middle guide faceof an outer side direction change path, a return guideformed with an inner peripheral guide faceof the inner side direction change path, and a lid memberformed with an outer peripheral guide faceof the outer side direction change path

Linear guide bearing apparatus

A separator for use in a linear guide having a guide rail, a slider disposed on the guide rail so as to move relatively each other, and a plurality of roller-shaped rolling elements incorporated in the slider, the separator has a separator main body having, on both sides in a front and rear direction thereof, recessed surface sections which contact circumferential sections of the rolling elements; and at least a pair of arm sections provided parallel to each other on both sides of the separator main body while being oriented in the same direction, wherein a length of the arm section is equal or shorter than a distance between centers of two adjacent rolling elements with the separator main body sandwiched therebetween, with respect to a lateral direction of the separator main-body.

Separator, linear guide using the separator and linear motion apparatus

The top portion of a material for a rail of a linear guide is formed in a convex shape. In this convex shape, portions protruding to the side of a top surface are removed beforehand by rolling raceway grooves in side portions of a member of rectangular section, the top surface of which is flat. A rail made from this material by rolling raceway grooves in side portions have a flat top surface.

Material for rail of linear guide, rail for linear guide, process of manufacturing rail of linear guide, and linear guide

A process of manufacturing a rail of a linear guide is described. The process includes preparing a material for a rail wherein the material has a surface formed in a convex shap and two side surface. The method includes a rolling process of forming raceway grooves in the side surfaces of the material and a process for making a mounting hole after the rolling process in such a manner that the mounting hole opens to at least either surface.

The linear guide apparatus includes a guide railincluding a rolling body rolling grooveand a friction apply unitassembled to the guide rail. The friction apply unitincludes a unit main body, a brake member, an oil pressure cylinderand a plate spring. The brake memberis disposed so as to face the side surfaceof the guide railand can be contacted with the other portions of the side surfacethan the rolling body rolling groovethereof. The oil pressure cylinderincludes a piston memberwhich is structured to be driven in a positive direction to thereby press the brake memberagainst the side surfaceof the guide railand also the piston membercan be driven in the opposite direction to thereby remove the pressure of the brake memberfrom the side surface

The linear guide apparatus includes a guide rail including a rolling body rolling groove and a friction apply unit assembled to the guide rail . The friction apply unit includes a unit main body , a brake member , an oil pressure cylinder and a plate spring . The brake member is disposed so as to face the side surface of the guide rail and can be contacted with the other portions of the side surface than the rolling body rolling groove thereof. The oil pressure cylinder includes a piston member which is structured to be driven in a positive direction to thereby press the brake member against the side surface of the guide rail and also the piston member can be driven in the opposite direction to thereby remove the pressure of the brake member from the side surface

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Maebashi, Japan

Masaru Akiyama