JPH0639143Y2 - Structural structure of direction change path of small infinite linear motion ball bearing. - Google Patents

Description

【考案の詳細な説明】 産業上の利用分野 本考案は、断面矩形状のトラックレールと、該トラック
レールの両側面にボールを介して跨架嵌合されるスライ
ドユニツトとが相対的に無限直線運動を行う転がり軸受
に関し、より小形（例えば、トラツクレールの幅が20mm
以下、従ってボール径3.5mmφ以下）の軸受にも好適な
スライドユニツトの方向転換路の構成構造を提供するも
のである。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention In the present invention, a track rail having a rectangular cross section and a slide unit which is fitted over both sides of the track rail via balls are relatively infinitely straight lines. For rolling bearings in motion, smaller size (for example, track rail width of 20 mm
Accordingly, the present invention provides a slide unit direction change path suitable for a bearing having a ball diameter of 3.5 mmφ or less).

従来の技術 従来のこの種の直線運動用玉軸受の方向転換路は、側板
内に形成されている。即ち、直線状の負荷路とリターン
路との間を連結するために、側板内に半円弧状の凹溝が
凹接されており、方向転換路の外側壁面を形成する。方
向転換路の内側壁面は、略蒲鉾形の半円筒状のチツプに
より形成され、該チツプが前記半円弧状の凹溝に橋渡し
をする状態に嵌合凹溝に嵌合されて、内外両壁面が完備
された方向転換が完成される。2. Description of the Related Art The conventional diversion path of this type of linear motion ball bearing is formed in the side plate. That is, in order to connect between the linear load path and the return path, a semi-circular arc shaped groove is formed in the side plate so as to form an outer wall surface of the direction change path. The inner wall surface of the direction change path is formed by a semi-cylindrical chip having a substantially semi-cylindrical shape, and the chip is fitted into the fitting groove so as to bridge the semi-circular groove, and the inner and outer wall surfaces are formed. A complete turning direction is completed.

前記従来例の構成のものは、中形以上の直線運動用玉軸
受であれば、方向転換路も大形となり、従つてチツプの
寸法も大きく、側板にチツプを嵌め込む組立作業も容易
に行われ、組立作業上問題はない。ところが小形の直線
運動用玉軸受では、チツプも小形となり、方向転換路を
完成するためには、ピンセツトで小形のチツプを摘み上
げ、側板の嵌合凹溝内に嵌合するという作業も必要とす
るため、嵌合不充分となることもあり、作業性が極端に
悪くなり、生産性及び精度の向上策が望まれていた。ま
た、側板とケーシングとの正確な組立位置がセツトでき
ないため、側板の方向転換路とケーシングのリターン路
とが境界面で連絡位置のずれを生じ、このため方向転換
路とリターン路との間を転動するボールの円滑な転動が
妨げられ、チツプの嵌合不充分と相俟つて無限循環路内
のボールの移動が妨げられるため、小形無限直線運動用
玉軸受の直線運動の抵抗増を招来していた。In the case of the ball bearing for linear motion of medium or larger size, the conventional structure has a large direction change path, and therefore the size of the chip is large, and the assembly work for fitting the chip into the side plate can be easily performed. There is no problem in assembly work. However, with small ball bearings for linear motion, the chip is also small, and in order to complete the direction change path, it is also necessary to pick up the small chip with a pin set and fit it into the fitting groove of the side plate. Therefore, the fitting may be insufficient and the workability is extremely deteriorated, and a measure for improving productivity and accuracy has been desired. In addition, since the correct assembly position of the side plate and the casing cannot be set, the direction change path of the side plate and the return path of the casing cause a shift in the connecting position at the boundary surface, which causes the direction change path and the return path to be separated. The smooth rolling of the rolling balls is hindered, and the movement of the balls in the infinite circulation path is hindered due to the insufficient fitting of the chip, which increases the resistance of the linear motion of the small infinite linear motion ball bearing. I was invited.

考案が解決しようとする問題点 本考案は、チツプを連設したスペーサを側板の嵌合凹溝
内に取付け嵌合する作業を、小形の軸受にあつても容易
に且つ正確に行うことができると共に、側板に形成され
た方向転換路とケーシングに形成された軌道溝およびリ
ターン路との位置合わせを正確に合わせることができる
小形無限直線運動用玉軸受を提供せんとするものであ
る。DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention According to the present invention, it is possible to easily and accurately perform the work of mounting and fitting the spacer in which the chips are continuously arranged in the fitting groove of the side plate even with a small bearing. At the same time, it is an object of the present invention to provide a small infinite linear motion ball bearing capable of accurately aligning the direction changing passage formed in the side plate with the raceway groove and the return passage formed in the casing.

問題点を解決するための手段 本考案は、長手方向にレール軌道溝が凹設されている断
面矩形状のトラックレールと、該トラックレールと対峙
する内側面に前記レール軌道溝に対峙しうる内側軌道溝
が長手方向に凹設されかつ該内側軌道溝のそれぞれに平
行してリターン路が形成されているケーシングと、該ケ
ーシングの進行方向の両端に取付け固着可能とされ、か
つ前記対峙する両軌道溝よりなる負荷路と前記リターン
路とを連絡する略半円弧状の方向転換路が形成されてい
る側板と、前記負荷路、リターン路および側板の両方向
転換路よりなる無限循環路中に無限循環可能に配列、保
持される多数のボールとよりなり、前記トラックレール
上に前記負荷路中のボールを介して前記ケーシングが摺
動自在に跨架嵌合された無限直線運動用玉軸受に関する
ものであって、前記レール軌道溝はトラックレールの左
右両側面にのみ各１条列凹設され、前記ケーシングの内
側軌道溝も内側面の左右両側面にのみ各１条列凹設さ
れ、前記両軌道溝が直接相対峙して前記トラックレール
とケーシングとの相対する左右の両側面にのみ各１条列
の負荷路が形成され、ケーシングの左右両側の前記負荷
路より外側のより低い位置にリターン路が各１条列形成
され、前記負荷路とリターン路とを連絡する略半円弧状
の左右の方向転換路はそれぞれ外側に向けて低く傾斜し
て両側板内に形成され、前記断面矩形状のトラックレー
ルに跨架される前記両側板には、スペーサ挟着凹部が凹
設されまたそのコ字状垂下部にはそれぞれ前記外側下方
に傾斜した方向転換路の外側壁面を形成する方向転換路
凹溝および該方向転換路凹溝に直交して上端が外方に傾
斜した突出部端部嵌合凹溝が凹設され、前記方向転換路
凹溝の内端は、前記負荷路内を転動するボールの方向転
換路へのすくい部とされ、組立てられたとき前記レール
軌道溝内へ突出され、前記ケーシングと側板のスペーサ
挟着凹部との間には前記方向転換路凹溝に達しない短い
薄板コ字状のスペーサが挟着可能とされ、該スペーサの
垂下部下端には前記方向転換路の内側壁面を形成する従
来のチツプに相当する短円柱状の方向転換路突出部が、
組立てられたとき、前記傾斜した突出部端部嵌合凹溝と
合致する位置に上端が外側に傾斜して左右一体に突設さ
れ、前記スペーサの両方向転換路突出部の上下両端部は
前記側板の突出部端部嵌合凹溝にそれぞれ嵌入可能とさ
れており、前記側板の方向転換路凹溝の近傍にはケーシ
ング側に面して位置決め突出部が突設され、前記スペー
サおよびケーシングにはそれぞれ位置決め孔が穿設さ
れ、前記位置決め突出部が前記スペーサおよびケーシン
グの位置決め孔に嵌入可能とされ、前記位置決め突出部
の位置決め孔への嵌入により前記ケーシング、スペーサ
および側板の位置決め固定が可能とされ、かつ方向転換
路が正確に形成される構成により前述の問題点を解決し
得たものである。Means for Solving the Problems The present invention relates to a track rail having a rectangular rail track groove in the longitudinal direction, and an inner surface facing the track rail, the inner surface facing the track track groove. A casing in which raceway grooves are provided in the longitudinal direction and return paths are formed in parallel with each of the inner raceway grooves, and both raceways which can be fixedly attached to both ends of the casing in the traveling direction and which face each other. An endless circulation in an endless circulation path composed of a side plate formed with a substantially semi-circular direction change path connecting the load path formed of a groove and the return path, and both of the load path, the return path and the side plate A ball shaft for infinite linear movement, which is composed of a large number of balls arranged and held as much as possible, and in which the casing is slidably fitted on the track rail via the balls in the load path. The rail track groove is recessed in one row only on both left and right side surfaces of the track rail, and the inner track groove of the casing is recessed in one row only on both left and right inner surface sides. , The two track grooves are directly opposed to each other, and a single row of load paths is formed only on the opposite left and right side surfaces of the track rail and the casing. Each of the return paths is formed in one row at the position, and the substantially semi-circular left and right direction change paths that connect the load path and the return path are formed in both side plates with a low inclination toward the outside. Spacers holding recesses are provided in the both side plates straddling the track rails having a rectangular cross section, and the U-shaped hanging parts are formed with the outer wall surfaces of the direction change paths inclined downward toward the outside. Direction change groove and A projecting end end fitting concave groove having an upper end inclined outwardly orthogonal to the direction changing path concave groove is provided, and an inner end of the direction changing path concave groove is a ball rolling in the load path. Is a scoop part to the direction change path, and when assembled, protrudes into the rail track groove, and between the casing and the spacer sandwiching recess of the side plate, a short thin plate coke that does not reach the direction change path groove. A letter-shaped spacer can be sandwiched, and at the lower end of the hanging portion of the spacer, there is formed a short columnar direction change path protrusion corresponding to a conventional chip forming an inner wall surface of the direction change path.
When assembled, the upper end is inclined outwardly at a position that coincides with the slanted projection end fitting groove, and the left and right ends of the bidirectional conversion path projection of the spacer are provided at the side plate. Each of the protrusions is fitted into a corresponding end groove, and a positioning protrusion is provided in the vicinity of the direction change path groove of the side plate so as to face the casing. Positioning holes are provided respectively, and the positioning protrusions can be fitted into the positioning holes of the spacer and the casing, and the casing, the spacer, and the side plate can be positioned and fixed by fitting the positioning protrusions into the positioning holes. In addition, the above-mentioned problems can be solved by the structure in which the turning path is accurately formed.

作用 前述の構成とすることにより、小形の無限直線運動用玉
軸受であるにも拘わず、側板とスペーサとにより方向転
換路が正確に形成され、且つ方向転換路とリターン路と
の継合が正確に行われ、組立の作業性が向上し、ボール
群の無限循環路内の円滑な転動を来す。Action With the above-mentioned configuration, the direction change path is accurately formed by the side plate and the spacer, and the connection between the direction change path and the return path is achieved despite the fact that the ball bearing is for a small infinite linear motion. Is accurately performed, assembly workability is improved, and smooth rolling of the balls in the infinite circulation path is achieved.

実施例 以下本考案の構成を第１図〜第４図および第13図〜第15
図に示す実施例により説明する。本考案は、両側面1,1
の長手方向にのみレール軌道溝2,2がそれぞれ凹設され
ている断面矩形状のトラックレール３と、該トラツクレ
ール３の両側面1,1と対峙するコ字状の内側面４に前記
両レール軌道溝2,2にそれぞれ対峙しうる内側軌道溝５
が長手方向に凹設されかつ該内側軌道溝５のそれぞれの
外側に平行してリターン路6,6が形成されているケーシ
ング７と、該ケーシング７の進行方向双矢印Ａ方向の両
端面8,8に取付固着可能とされ、かつ前記対峙するレー
ル軌道溝２と内側軌道溝５とよりなる負荷路９と前記リ
ターン路６とを連絡する略半円弧状の方向転換路10が形
成されている側晩11と、前記負荷路９、リターン路６お
よび側板11の両方向転換路10,10よりなる無限循環路中
に無限循環可能に配列保持される多数のボール12,12と
よりなり、前記トラツクレール３上に前記負荷路９中の
ボール12を介して前記ケーシング７が摺動自在に跨架嵌
合された無限直線運動用玉軸受であり、前記レール軌道
溝２はトラックレール３の左右両側面1,1にのみ各１条
列凹設され、前記ケーシング７の内側軌道溝５も内側面
４の左右両内壁側面17,17にのみ各１条列凹設され、前
記両軌道溝2,5が直接相対峙して前記トラックレール３
とケーシング７との相対する左右両側面1,1および４に
のみ各１条列の負荷路９が形成され、ケーシング７の左
右両側の前記負荷路９より外側のより低い位置にリター
ン路６が各１条列形成され、前記負荷路９とリターン路
６とを連絡する略半円弧状の左右の方向転換路10,10は
それぞれ外側に向けて低く傾斜して両側板11,11内に形
成され、前記断面矩形状のトラックレール３に跨架され
る前記両側板11,11には、スペーサ挟着凹部31が凹設さ
れまたその進行方向左右のコ字状をなす垂下部13,13に
それぞれ前記外側下方に傾斜した方向転換路10の半円弧
状外側壁面を形成する方向転換路凹溝14,14が、また該
方向転換路凹溝14の中央に直交して上端が外方に傾斜し
た突出部端部嵌合凹溝15,15が凹設され、前記方向転換
路凹溝14の内端は、前記負荷路９内を転動するボール1
2,12の方向転換路10へのすくい部30とされ、組立てられ
たとき前記レール軌道溝２内へ突出し、前記ケーシング
７と側板11,11のスペーサ挟着凹部31,31との間には前記
側板11の垂下部13より短く前記方向転換路凹溝14に達し
ない長さの薄板コ字状のスペーサ16,16が挟着可能とさ
れ、該スペーサ16のコ字状垂下部の下端には前記方向転
換路10の内壁側面17を形成する短半円柱状の方向転換路
突出部18,18が左右に一体に突設され、また該両方向転
換路突出部18,18間を連結するコ字状の薄肉部19が形成
されており、前記スペーサ16の両方向転換路突出部18,1
8の上下の端部20,20は前記側板11の突出部嵌合凹溝15,1
5にそれぞれ嵌入可能とされており、また前記側板11の
垂下部13,13の方向転換路凹溝14,14の近傍にはケーシン
グ７側に面して短円柱状の位置決め突出部21,21が突設
され、前記スペーサ16およびケーシング７の挾着端面に
はそれぞれ位置決め孔22,23が穿設され、組立に際し前
記位置決め突出部21が前記スペーサ16の位置決め孔22お
よびケーシング７の位置決め孔23に嵌入可能とされ、前
記位置決め突出部21の位置決め孔22,23への嵌入によ
り、前記ケーシング７、スペーサ16および側板11の位置
決め固定が可能とされ、前記側板11およびスペーサ16の
位置決めにより、第13図、第14図の組立部分拡大断面図
に示すごとく、側板11の方向転換路凹溝14とスペーサ16
の方向転換路突出部18とによる方向転換路10が正確に形
成され、また同時に側板11、スペーサ16およびケーシン
グ７の位置決めにより方向転換路10とリターン路６との
継合が正確に行われる。位置決め後の側板11、スペーサ
16のケーシング７への固定は、側板11の取付孔27および
スペーサ16の取付孔25を挿通するボルト26による螺着で
で行われる。第13図は負荷路９、方向転換路10およびリ
ターン路６中を転動するボール12,12群のボール芯転動
軌跡32を含む面、従って第14図中半円柱状の方向転換路
突出部18の軸心と直角なXIII-XIII線断面で示す部分拡
大組立断面図であり、第14図は第13図中半円柱状の方向
転換路突出部18の軸心を含むXIV-XIV線断面で示す部分
拡大組立断面図であり、同図中31は方向転換路10を転動
するボール12のボール芯を示す。Embodiments The construction of the present invention will be described below with reference to FIGS. 1 to 4 and 13 to 15.
This will be described with reference to the embodiment shown in the figure. The present invention is designed on both sides 1,1
The track rail 3 having a rectangular cross section in which the rail track grooves 2 and 2 are respectively provided only in the longitudinal direction of the track rail 3 and the U-shaped inner side surface 4 facing both side surfaces 1 and 1 of the track rail 3 are both described above. Inner track groove 5 that can face the rail track grooves 2 and 2, respectively
And a casing 7 in which return passages 6 are formed in parallel with the outer sides of the inner raceway groove 5, respectively, and both end surfaces 8 in the direction of the double arrow A in the traveling direction of the casing 7. A semi-circular turning path 10 is formed which can be fixedly attached to the vehicle 8, and which connects the return path 6 and the load path 9 composed of the rail track groove 2 and the inner track groove 5 facing each other. The track 11 comprises a side wall 11 and a large number of balls 12 and 12 arranged and held in an infinite circulation path in the endless circulation path consisting of the load path 9, the return path 6 and the direction changing paths 10 and 10 of the side plate 11. An infinite linear motion ball bearing in which the casing 7 is slidably fitted over the rail 3 via the balls 12 in the load path 9, and the rail track groove 2 is provided on both left and right sides of the track rail 3. Only one surface is provided on each of the surfaces 1 and 1, and the casing 7 Are each 1 rows of recessed only in the left and right inner walls sides 17, 17 of the side raceway groove 5 even inner surface 4, wherein both raceway grooves 2 and 5 to face directly phase track rail 3
The load passages 9 of one row are formed only on the opposite left and right side surfaces 1, 1 and 4 of the casing 7 and the return passage 6 at a lower position outside the load passages 9 on the left and right sides of the casing 7. The left and right direction change paths 10, 10 each having a single row and each connecting the load path 9 and the return path 6 and each having a substantially semi-circular shape are formed in both side plates 11, 11 with a low inclination toward the outside. Spacer holding recesses 31 are provided in the side plates 11, 11 spanning the track rail 3 having a rectangular cross section, and the spacer holding recesses 31 are formed in the U-shaped hanging parts 13, 13 on the left and right in the traveling direction. Each of the direction-changing-path concave grooves 14, 14 forming a semi-circular outer wall surface of the direction-changing path 10 which is inclined downwardly toward the outside, and the upper end of the direction-changing path concave groove 14, which is orthogonal to the center of the direction-changing path concave groove 14, is inclined outward. The protruding end end fitting recessed grooves 15, 15 are provided as recesses, and the inner end of the direction change passage recessed groove 14 rolls in the load passage 9. Ball 1
It is a scooping part 30 for the direction change path 10 of 2, 2 and protrudes into the rail track groove 2 when assembled, and between the casing 7 and the spacer holding recesses 31, 31 of the side plates 11, 11. Thin plate U-shaped spacers 16, 16 having a length shorter than the hanging part 13 of the side plate 11 and not reaching the direction change path concave groove 14 can be sandwiched, and the lower end of the U-shaped hanging part of the spacer 16 can be sandwiched. Is a short semi-cylindrical direction change path projecting portion 18, 18 forming an inner wall side surface 17 of the direction change path 10 integrally projecting to the left and right, and a joint connecting the two direction change path projecting portions 18, 18. A letter-shaped thin portion 19 is formed, and the bidirectional direction change path protruding portions 18, 1 of the spacer 16 are formed.
The upper and lower end portions 20, 20 of 8 are the projection fitting recessed grooves 15, 1 of the side plate 11.
5 and the positioning protrusions 21, 21 in the shape of a short cylinder facing the casing 7 in the vicinity of the direction change path concave grooves 14, 14 of the hanging parts 13, 13 of the side plate 11. And positioning holes 22 and 23 are formed in the sandwiching end surfaces of the spacer 16 and the casing 7, respectively, and the positioning protrusion 21 is positioned by the positioning hole 22 of the spacer 16 and the positioning hole 23 of the casing 7 during assembly. The casing 7, the spacer 16 and the side plate 11 can be positioned and fixed by inserting the positioning protrusion 21 into the positioning holes 22 and 23, and the positioning of the side plate 11 and the spacer 16 As shown in the enlarged cross-sectional views of the assembled portion of FIGS. 13 and 14, the direction changing groove 14 and the spacer 16 of the side plate 11 are shown.
The direction changing path 10 is accurately formed by the direction changing path protruding portion 18, and at the same time, the direction changing path 10 and the return path 6 are accurately joined by the positioning of the side plate 11, the spacer 16 and the casing 7. Side plate 11 after positioning, spacer
The fixing of 16 to the casing 7 is carried out by screwing with a bolt 26 which is inserted through the mounting hole 27 of the side plate 11 and the mounting hole 25 of the spacer 16. FIG. 13 shows the surface including the ball core rolling locus 32 of the balls 12, 12 rolling in the load path 9, the direction changing path 10 and the return path 6, and therefore the semi-cylindrical direction changing path protrusion in FIG. FIG. 14 is a partially enlarged assembly cross-sectional view taken along a line XIII-XIII taken at a right angle to the axis of the portion 18, and FIG. 14 is a XIV-XIV line including the axis of the semi-cylindrical direction change path protruding portion 18 in FIG. 13. FIG. 3 is a partially enlarged sectional view showing a cross section, in which 31 denotes a ball core of a ball 12 rolling in the direction changing path 10.

なお前記側板11,11の外端面にはそれぞれシール27,27が
装着され、無限循環路内への異物の浸入を阻止する。ト
ラツクレール３にはレール取付孔28がケーシング７には
ケーシング取付孔29が突設されている。また側板11の方
向転換路凹溝14の内端部は負荷路９上のボール12を方向
転換路10にすくい上げるすくい部30が負荷路９へ突設さ
れている。前記諸部材の組立の関係は第１図，第２図で
も明らかであるが、第15図の分解斜視図により、より明
らかにされている。第５図〜第12図に示す第２の実施例
は、第８図、第10図に明示する如く、方向転換路のケー
シング進行方向への投影も下方へ凹の円弧状をなすもの
について示している。Seals 27, 27 are attached to the outer end surfaces of the side plates 11, 11 respectively to prevent foreign matter from entering the infinite circulation path. The track rail 3 is provided with a rail mounting hole 28, and the casing 7 is provided with a casing mounting hole 29. Further, a scoop portion 30 for scooping up the balls 12 on the load path 9 to the direction change path 10 is provided at the inner end of the direction change path concave groove 14 of the side plate 11 so as to project to the load path 9. The relationship of assembly of the above-mentioned members is clear from FIGS. 1 and 2, but is more clear from the exploded perspective view of FIG. The second embodiment shown in FIGS. 5 to 12 shows a case in which the projection of the direction change path in the casing traveling direction also has an arc shape which is concave downward, as clearly shown in FIGS. 8 and 10. ing.

本実施例では側板11aに凹設される方向転換路凹溝14aお
よびスペーサ16aの方向転換路突出部18aの内壁側面17a
が、いずれも前記下方へ凹の円弧状の方向転換路に合致
する形状とされている。なお本実施例においても、側板
11a、スペーサ16aおよびケーシング７の組立状態での方
向転換路付近の断面図は、第13図および第14図と略同じ
である。In this embodiment, the side wall 11a is formed with the direction change passage groove 14a and the spacer 16a, and the inner wall side surface 17a of the direction change passage protrusion 18a of the spacer 16a.
However, each of them has a shape that matches the downward concave arc-shaped direction changing path. In this embodiment also, the side plate
A cross-sectional view of the vicinity of the direction change path in the assembled state of 11a, the spacer 16a, and the casing 7 is substantially the same as that in FIGS. 13 and 14.

前述のスペーサ16,16a、側板11,11aは通常の使用条件の
ものは、いずれも合成樹脂材料のインジエクシヨンモー
ルド等によつて形成され、複雑な形状も正確に同時に成
形可能である。The spacers 16 and 16a and the side plates 11 and 11a under the normal use conditions are all formed by an injection molding or the like of a synthetic resin material, and a complicated shape can be accurately molded at the same time.

本考案は、ケーシング、スペーサ、側板、シールよりな
るスライドユニツトの負荷路に対するリターン路の関係
位置等については図示実施例に限られず、従来公知の小
形無限直線運動用玉軸受のいずれの形状のものの方向転
換路の構成構造にも実施可能である。The present invention is not limited to the illustrated embodiment with respect to the relative position of the return path to the load path of the slide unit consisting of the casing, spacers, side plates, and seals, and any of the conventionally known small infinite linear motion ball bearings can be used. It is also possible to implement the structure of the turning path.

考案の効果 本考案は、断面矩形状のトラックレールの両側面にのみ
各１条列の無限循環路の負荷路を有し、ケーシングに形
成されるリターン路は負荷路の斜外下方に形成され、従
って方向転換路も外側に低く傾斜して側板内に形成され
て、小形無限直線運動用玉軸受のより小形化を図ること
ができたものであり、また従来の構成の小形無限直線運
動用玉軸受にあっては、組立に際し方向転換路を完成す
るため、極く小形化あれた部品をピンセット作業により
行うため作業性が悪く組立精度も劣り、また側板の方向
転換路とケーシングのリターン路とが側板とケーシング
との境界当接面でずれを生じ前記両路間でのボールの円
滑な転動が妨げられ、小形無限直線運動用玉軸受として
の抵抗増を招来していたが、本考案においてはケーシン
グと側板との間に薄板コ字状のスペーサを挟着せしめ、
該スペーサに短半円柱状の方向転換路突出部が一体に突
設され、該突出部の上下端は、側板に凹設される突出部
端部嵌合凹溝に嵌入可能とされ、前記側板の方向転換路
凹溝の近傍にはケーシング側に面して位置決め突出部が
突設され、該位置決め突出部がスペーサおよびケーシン
グの位置決め孔に嵌入可能とされているので、側板内に
方向転換路を形成することが正確かつ容易に行われ、ス
ペーサの方向転換路突出部と側板の方向転換路凹溝との
位置決め、およびケーシングのリターン路ならびに負荷
路と方向転換路との位置決めが、スライドユニツトの組
立に際し、方向転換路の近傍に形成された位置決め突出
部と位置決め孔との嵌合により正確且つ容易にセツト可
能であり、一つのスペーサの両側に小さな方向転換路突
出部が連設されているため従来のピンセツト作業を省
き、前述の位置決め嵌合と相俟つて方向転換路の組立形
成作業を極めて簡単迅速に行うことが可能となり、負荷
路内へのすくい部の突出形成と相俟って、小形無限直線
運動用玉軸受の直線運動抵抗の低下をもたらし、しかも
軸受として安価に製作可能である各種の効果を奏する。Effect of the Invention According to the present invention, the load path of the infinite circulation path of each one row is provided only on both side surfaces of the track rail having a rectangular cross section, and the return path formed in the casing is formed obliquely below the load path. Therefore, the direction change path is also formed in the side plate with a low inclination to the outside, which makes it possible to further reduce the size of the ball bearing for small infinite linear motion. In the case of ball bearings, the direction change path is completed at the time of assembly, so the workability is poor and the assembly accuracy is poor because extremely small parts are done by tweezers work, and the direction change path of the side plate and the return path of the casing. And were deviated at the boundary contact surface between the side plate and the casing, which hindered smooth rolling of the balls between the two paths, leading to an increase in resistance as a small infinite linear motion ball bearing. Invented casing and side Insert a thin U-shaped spacer between the plate and
A short semi-cylindrical direction change path projecting portion is integrally provided on the spacer, and upper and lower ends of the projecting portion can be fitted into a projecting portion end fitting recessed groove that is recessed in the side plate. In the vicinity of the direction change path concave groove, a positioning protrusion is provided so as to face the casing side, and the positioning protrusion can be fitted into the spacer and the positioning hole of the casing. Is formed accurately and easily, and the positioning of the protruding portion of the direction change path of the spacer and the groove of the direction change path of the side plate and the positioning of the return path of the casing and the load path and the direction change path are performed by the slide unit. When assembling, it is possible to set accurately and easily by fitting the positioning projection formed in the vicinity of the direction change path and the positioning hole, and small direction change path projections are continuously provided on both sides of one spacer. Therefore, the conventional pin-settling work can be omitted, and in combination with the above-mentioned positioning and fitting, the assembly work of the direction change path can be performed very easily and quickly, and the rake part can be projected into the load path. As a result, the linear motion resistance of the small infinite linear motion ball bearing is reduced, and various effects can be obtained that the bearing can be manufactured at low cost.

【図面の簡単な説明】[Brief description of drawings]

第１図は第１の実施例の一部切断斜視図、第２図は同上
右半部は側板を取外し、かつトラツクレールをレール取
付孔心で切断して示した拡大立面図、第３図は同上スペ
ーサ拡大斜視図、第４図は同上側板のケーシング側拡大
立面図、第５図は第２の実施例のスペーサの側板側立面
図、第６図は同上スペーサの側面図、第７図は第５図中
矢視VII方向部分拡大底面図、第８図は同上側板のスペ
ーサ側立面図、第９図は第８図中IX-IX線断面図、第10
図は同上側板の部分拡大立面図、第11図は第10図中矢視
XI方向部分拡大上面図、第12図は第10図中XII-XII線部
分拡大断面図、第13図は第１の実施例の、第14図中XIII
-XIII線部分拡大断面図、第14図は同上第13図中XIV-XIV
線部分拡大断面図、第15図は同上分解斜視図である。 1:側面、2:レール軌道溝、3:トラツクレール、4:内側
面、5:内側軌道溝、6:リターン路、7:ケーシング、8:端
面、9:負荷路、10:方向転換路、11,11a:側板、12:ボー
ル、13:垂下部、14,14a:方向転換路凹溝、15:突出部端
部嵌合凹溝、16,16a:スペーサ、17,17a:内壁側面、18,1
8a:方向転換路突出部、19:薄肉部、20:端部、21:位置決
め突出部、22,23:位置決め孔、30:すくい部、31:スペー
サ挟着凹部。FIG. 1 is a partially cutaway perspective view of the first embodiment, and FIG. 2 is an enlarged elevational view showing a right half of the same with a side plate removed and a track rail cut at a rail mounting hole center. FIG. 4 is an enlarged perspective view of the same spacer, FIG. 4 is an enlarged elevational view of the upper plate on the casing side, FIG. 5 is a side elevational view of the spacer of the second embodiment, and FIG. 6 is a side view of the same spacer. FIG. 7 is a partially enlarged bottom view in the direction of arrow VII in FIG. 5, FIG. 8 is a spacer side elevational view of the upper plate, and FIG. 9 is a sectional view taken along line IX-IX in FIG.
The figure shows a partially enlarged elevational view of the upper plate, and Fig. 11 is the arrow in Fig. 10.
A partially enlarged top view in the XI direction, FIG. 12 is a partially enlarged sectional view taken along line XII-XII in FIG. 10, and FIG. 13 is XIII in FIG. 14 of the first embodiment.
-XIII Partial enlarged sectional view, Fig. 14 is the same as Fig. 13 XIV-XIV
FIG. 15 is an exploded perspective view of the same as FIG. 1: side surface, 2: rail track groove, 3: track rail, 4: inner side surface, 5: inner track groove, 6: return path, 7: casing, 8: end surface, 9: load path, 10: direction change path, 11, 11a: Side plate, 12: Ball, 13: Hanging part, 14, 14a: Direction change path concave groove, 15: Projection end end fitting concave groove, 16, 16a: Spacer, 17, 17a: Inner wall side surface, 18 , 1
8a: direction change path protruding portion, 19: thin portion, 20: end portion, 21: positioning protruding portion, 22 and 23: positioning hole, 30: scoop portion, 31: spacer holding recessed portion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】長手方向にレール軌道溝が凹設されている
断面矩形状のトラックレールと、該トラックレールと対
峙する内側面に前記レール軌道溝に対峙しうる内側軌道
溝が長手方向に凹設されかつ該内側軌道溝のそれぞれに
平行してリターン路が形成されているケーシングと、該
ケーシングの進行方向の両端に取付け固着可能とされ、
かつ前記対峙する両軌道溝よりなる負荷路と前記リター
ン路とを連絡する略半円弧状の方向転換路が形成されて
いる側板と、前記負荷路、リターン路および側板の両方
向転換路よりなる無限循環路中に無限循環可能に配列保
持される多数のボールとよりなり、前記トラックレール
上に前記負荷路中のボールを介して前記ケーシングが摺
動自在に跨架嵌合された無限直線運動用玉軸受におい
て、前記レール軌道溝はトラックレールの左右両側面に
のみ各１条列凹設され、前記ケーシングの内側軌道溝も
内側面の左右両側面にのみ各１条列凹設され、前記両軌
道溝が直接相対峙して前記トラックレールとケーシング
との相対する左右両側面にのみ各１条列の負荷路が形成
され、ケーシングの左右両側の前記負荷路より外側のよ
り低い位置にリターン路が各１条列形成され、前記負荷
路とリターン路とを連絡する略半円弧状の左右の方向転
換路はそれぞれ外側に向けて低く傾斜して両側板内に形
成され、前記断面矩形状のトラックレールに跨架される
前記両側板には、スペーサ挟着凹部が凹設され、またそ
のコ字状垂下部にはそれぞれ前記外側下方に傾斜した方
向転換路の外側壁面を形成する方向転換路凹溝および該
方向転換路凹溝に直交して上端が外方に傾斜した突出部
端部嵌合凹溝が凹設され、前記方向転換路凹溝の内端
は、前記負荷路内を転動するボールの方向転換路へのす
くい部とされ、組立てられたとき前記レール軌道溝内へ
突出され、前記ケーシングと側板のスペーサ挟着凹部と
の間には薄板コ字状のスペーサが挟着可能とされ、該ス
ペーサには前記側板の垂下部より短く前記方向転換路凹
溝に達しない長さのコ字状の薄肉部が形成され、また該
薄肉部のコ字状垂下部の下端には前記方向転換路の内側
壁面を形成する短半円柱状の方向転換路突出部が組立て
られたとき前記傾斜した突出部端部嵌合凹溝と合致する
位置に上端が外側に傾斜して左右に一体に突設され、前
記スペーサの両方向転換路突出部の上下両端部は前記側
板の突出部端部嵌合凹溝にそれぞれ嵌入可能とされてお
り、前記側板の方向転換路凹溝の近傍にはケーシング側
に面して位置決め突出部が突設され、前記スペーサおよ
びケーシングにはそれぞれ位置決め孔が穿設され、前記
位置決め突出部が前記スペーサおよびケーシングの位置
決め孔に嵌入可能とされ、前記位置決め突出部の位置決
め孔への嵌入により前記ケーシング、スペーサおよび側
板の位置決め固定が可能とされ、かつ方向転換路が正確
に形成されることを特徴とする小形無限直線運動用玉軸
受の方向転換路の構成構造。1. A track rail having a rectangular cross section in which a rail track groove is provided in the longitudinal direction, and an inner track groove which can face the rail track groove is recessed in the longitudinal direction on an inner side surface facing the track rail. A casing having a return path formed in parallel with each of the inner raceway grooves, and can be fixedly attached to both ends of the casing in the traveling direction,
And a side plate on which a substantially semi-circular direction change path connecting the load path formed of the facing raceway grooves and the return path is formed, and an infinity formed of the load path, the return path, and the direction change path of both side plates. For infinite linear motion, which is composed of a large number of balls arranged in an infinitely circulatory manner in a circulation path and in which the casing is slidably fitted on the track rail via the balls in the load path. In the ball bearing, the rail raceway grooves are recessed in one row only on both left and right sides of the track rail, and the inner raceway grooves of the casing are recessed in one row only on both right and left sides of the inner side surface. The track grooves are directly opposed to each other to form a single row of load paths only on the opposite left and right side surfaces of the track rail and the casing, and the retarder is provided at a lower position outside the load paths on both the left and right sides of the casing. Each of the paths is formed in one line, and the substantially semi-circular left and right direction change paths that connect the load path and the return path are formed in both side plates with a low inclination toward the outside, respectively, and have the rectangular cross section. Spacer holding recesses are provided in the both side plates straddling the track rails, and the U-shaped hanging parts respectively form the outer wall surfaces of the outer wall surfaces of the direction diversion paths inclined downward toward the outer side. A projecting end end fitting concave groove having an upper end inclined outward orthogonally to the road concave groove and the direction changing groove is formed so that the inner end of the direction changing groove is inside the load path. It is a scoop part of the rolling ball to the direction change path, and when assembled, it projects into the rail track groove, and a thin plate U-shaped spacer is sandwiched between the casing and the spacer sandwiching recess of the side plate. It can be attached to the spacer and is shorter than the hanging part of the side plate. A U-shaped thin-walled portion having a length that does not reach the direction-changing path concave groove is formed, and a short semi-cylindrical shape forming an inner wall surface of the direction-changing path is formed at the lower end of the U-shaped hanging portion of the thin-walled section. When the direction change path protrusion is assembled, the upper end is inclined outwardly at a position corresponding to the inclined protrusion end fitting groove, and the left and right direction integrally protrudes from the spacer. The upper and lower end portions are respectively capable of being fitted into the projecting end end fitting concave grooves of the side plate, and the positioning protruding part is provided in the vicinity of the direction change path concave groove of the side plate so as to face the casing side, Positioning holes are formed in the spacer and the casing, respectively, and the positioning protrusions can be fitted into the positioning holes of the spacer and the casing. By fitting the positioning protrusions into the positioning holes, the casing, the spacer, and the side plate are inserted. A structure for forming a direction changing path of a small ball bearing for infinite linear motion, which is capable of positioning and fixing and is precisely formed.