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JP2008121861A - Ball housing member and linear motion guide device - Google Patents

Ball housing member and linear motion guide device Download PDF

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Publication number
JP2008121861A
JP2008121861A JP2006309318A JP2006309318A JP2008121861A JP 2008121861 A JP2008121861 A JP 2008121861A JP 2006309318 A JP2006309318 A JP 2006309318A JP 2006309318 A JP2006309318 A JP 2006309318A JP 2008121861 A JP2008121861 A JP 2008121861A
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Prior art keywords
ball
circulation path
rolling element
ball holding
balls
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JP2006309318A
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Japanese (ja)
Inventor
Kazushige Arai
和繁 新井
Yoshinori Mizumura
美典 水村
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NSK Ltd
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NSK Ltd
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Priority to JP2006309318A priority Critical patent/JP2008121861A/en
Publication of JP2008121861A publication Critical patent/JP2008121861A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3818—Ball cages formed of unconnected segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
    • F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
    • F16C29/0638—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls
    • F16C29/0642—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/37—Loose spacing bodies

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

【課題】玉保持部の連結腕部の曲げ量を低減すること。
【解決手段】１対の玉保持部１１の外側面の玉収容凹部１４を、その玉保持部１１の無限循環路９内周側端面に開放した。そのため、玉保持部１１の外側面の玉収容凹部の開放方向と反対方向（転動体循環路外周側）に玉保持部１１を摺動でき、隣接する玉４によって玉保持部１１の前記転動体循環路外周側への動きが制限されないので、玉収容部材５に収容されている玉４が無限循環路で方向転換するときに、玉保持部１１が無限循環路の外周側に動くことができ、玉保持部１１の外側面に玉４の曲面に対応する球面状凹部を形成する方法に比べ、連結腕部１２の曲げ量を低減することができる。
【選択図】 図２A bending amount of a connecting arm portion of a ball holding portion is reduced.
A ball receiving recess 14 on an outer side surface of a pair of ball holding portions 11 is opened to an inner peripheral side end surface of the endless circulation path 9 of the ball holding portion 11. Therefore, the ball holding part 11 can be slid in the direction opposite to the opening direction of the ball receiving recess on the outer side surface of the ball holding part 11 (the outer periphery side of the rolling element circulation path), and the rolling element of the ball holding part 11 by the adjacent ball 4. Since movement to the outer circumference side of the circulation path is not limited, the ball holding portion 11 can move to the outer circumference side of the infinite circulation path when the ball 4 accommodated in the ball housing member 5 changes direction in the infinite circulation path. Compared with the method of forming a spherical concave portion corresponding to the curved surface of the ball 4 on the outer surface of the ball holding portion 11, the bending amount of the connecting arm portion 12 can be reduced.
[Selection] Figure 2

Description

本発明は、直動装置に用いられる転動体である玉を回転自在に収容する玉収容部材、及び当該玉収容部材を備えた直動案内装置に関する。   The present invention relates to a ball housing member that rotatably accommodates a ball that is a rolling element used in a linear motion device, and a linear motion guide device that includes the ball housing member.

従来、この種の玉収容部としては、例えば、転動体である玉を挟んで配置される１対の厚肉保持部と、その厚肉保持部のみを連結する薄肉連結部とを備え、前記１対の玉保持部の互いに対向する内側面及びその内側面と反対側の外側面に玉の曲面に対応した球面状凹部が形成されたものがある（例えば、特許文献１参照）。
また、その特許文献１には、玉収容部に収容されている玉と玉収容部に収容されていない玉とを直動装置の転動体循環路に交互に配置することが記載されている。
特開２０００−２２０６３６号公報 Conventionally, as this type of ball housing portion, for example, provided with a pair of thick-walled holding portions arranged with a ball that is a rolling element, and a thin-walled connecting portion that connects only the thick-walled holding portion, There is one in which spherical recesses corresponding to the curved surface of the ball are formed on the inner side surface of the pair of ball holding portions facing each other and the outer side surface opposite to the inner side surface (see, for example, Patent Document 1).
Further, in Patent Document 1, it is described that the balls accommodated in the ball accommodating portion and the balls not accommodated in the ball accommodating portion are alternately arranged in the rolling element circulation path of the linear motion device.
JP 2000-220636 A

しかしながら、上記従来の技術にあっては、玉保持部の外側面にも玉の曲面に対応した球面状凹部が形成されているため、球面状凹部が隣接する玉に嵌り込むことで、隣接する玉によって玉保持部の動きが制限され、玉収容部に収容されている玉が転動体循環路で方向転換するときに、転動体循環路の曲率半径よりも小さい曲率半径で薄肉連結部が屈曲され、連結腕部の曲げ量が増大し、摺動抵抗が増大する恐れがあった。
本発明は、上記従来の技術に鑑みてなされたものであって、玉保持部の連結腕部の曲げ量を低減可能な玉収容部材及び直動案内装置を提供することを目的とする。 However, in the above conventional technique, since the spherical concave portion corresponding to the curved surface of the ball is formed on the outer surface of the ball holding portion, the spherical concave portion is adjacent to the ball by being fitted into the adjacent ball. The movement of the ball holding part is limited by the ball, and when the ball accommodated in the ball accommodating part changes direction in the rolling element circulation path, the thin-walled coupling part bends with a curvature radius smaller than the curvature radius of the rolling element circulation path. As a result, the bending amount of the connecting arm portion is increased, and the sliding resistance may be increased.
The present invention has been made in view of the above-described conventional technique, and an object thereof is to provide a ball housing member and a linear motion guide device capable of reducing the amount of bending of a connecting arm portion of a ball holding portion.

上記課題を解決するために、本発明に係る玉収容部材は、転動体循環路を転動する玉を挟んで配置される１対の玉保持部と、前記１対の玉保持部を連結する連結腕部と、を備え、前記１対の玉保持部の互いに対向する内側面及び当該内側面と反対側の外側面には、玉を収容する玉収容凹部が形成されており、前記１対の玉保持部の前記外側面の前記玉収容凹部は、その玉保持部の前記転動体循環路内周側端面に開放されていることを特徴とする。   In order to solve the above-described problem, a ball housing member according to the present invention connects a pair of ball holding portions arranged with a ball rolling on a rolling element circulation path and the pair of ball holding portions. A ball receiving recess for receiving a ball is formed on the inner side surface of the pair of ball holding portions facing each other and on the outer side surface opposite to the inner side surface. The ball accommodating recess on the outer side surface of the ball holding portion is open to the end surface on the inner peripheral side of the rolling element circulation path of the ball holding portion.

このような構成によれば、玉保持部の外側面の玉収容凹部の開放方向と反対方向（転動体循環路外周側）に玉保持部を摺動でき、隣接する玉によって玉保持部の前記転動体循環路外周側への動きが制限されないので、玉収容部材に収容されている玉が転動体循環路で方向転換するときに、玉保持部が転動体循環路の外周側に動くことができ、玉保持部の外側面に玉の曲面に対応する球面状凹部を形成する方法に比べ、連結腕部に作用する曲げ力を低減することができる。   According to such a configuration, the ball holding portion can be slid in the direction opposite to the opening direction of the ball receiving recess on the outer side surface of the ball holding portion (the outer periphery side of the rolling element circulation path), and the ball holding portion can be slid by the adjacent ball. Since the movement to the outer circumference side of the rolling element circulation path is not limited, the ball holding part may move to the outer circumference side of the rolling element circulation path when the ball accommodated in the ball accommodation member changes direction in the rolling element circulation path. The bending force acting on the connecting arm portion can be reduced as compared with the method of forming the spherical concave portion corresponding to the curved surface of the ball on the outer surface of the ball holding portion.

また、前記１対の玉保持部の前記内側面の前記玉収容凹部は、その玉保持部の前記転動体循環路内周側端面及び外周側端面のうちいずれか一方に前記玉を挿通可能な開口部を有するものであってもよい。
このような構成によれば、玉を挿通可能な開口部がないものに比べ、組み立て時に、玉収容凹部に玉を収容して転動体循環路に配置する作業を容易に行うことができる。 Moreover, the said ball | bowl accommodation recessed part of the said inner surface of a pair of said ball | bowl holding | maintenance part can insert the said ball | bowl in either one of the said rolling element circulation path inner peripheral side end surface and outer peripheral side end surface of the ball | bowl holding part. It may have an opening.
According to such a configuration, it is possible to easily perform the operation of housing the ball in the ball housing recess and arranging it in the rolling element circulation path during assembly, as compared with the case where there is no opening through which the ball can be inserted.

さらに、前記１対の玉保持部の前記内側面の前記玉収容凹部は、その玉保持部の前記転動体循環路内周側端面及び外周側端面の両方に前記玉を挿通可能な開口部を有するものであってもよい。
このような構成によれば、玉を挿通可能な開口部がないものに比べ、組み立て時に、玉収容凹部に玉を収容して転動体循環路に配置する作業を容易に行うことができる。 Further, the ball receiving recess on the inner side surface of the pair of ball holding portions has an opening through which the ball can be inserted into both the inner end surface and the outer end surface of the rolling element circulation path of the ball holding portion. You may have.
According to such a configuration, it is possible to easily perform the operation of housing the ball in the ball housing recess and arranging it in the rolling element circulation path during assembly, as compared with the case where there is no opening through which the ball can be inserted.

また、前記連結腕部の前記玉循環方向の長さは、前記玉の直径より長くしてもよい。
このような構成によれば、転動体循環路内に形成される案内溝に連結腕部を摺動可能に嵌め込んだときに、案内溝によって拘束される長さを長くすることができ、転動体収容部材をより安定して案内し、連結腕部が案内溝から脱落することを防止できる。
さらに、前記連結部は、前記転動体循環路外周側に凸状に曲がっていてもよい。 The length of the connecting arm portion in the ball circulation direction may be longer than the diameter of the ball.
According to such a configuration, when the connecting arm portion is slidably fitted into the guide groove formed in the rolling element circulation path, the length restrained by the guide groove can be increased. The moving body housing member can be guided more stably, and the connecting arm portion can be prevented from falling off from the guide groove.
Furthermore, the said connection part may be bent in the convex shape to the said rolling-element circulation path outer peripheral side.

このような構成によれば、連結腕部が予め曲がっているため、玉収容部材に収容されている玉が転動体循環路で方向転換するときに、連結腕部の曲げ量の増大を抑制できる。
一方、本発明に係る直動案内装置は、転動体転送面を有する案内レールと、前記転動体転送面に対向する負荷転送面を含む転動体循環路を有し前記案内レールに相対運動自在に組み付けられたスライダー部と、前記転動体循環路内に配置され前記案内レールに対する前記スライダー部の相対運動に併せて循環する転動体である複数の玉と、前記複数の玉を回転摺動自在に収容する前記請求項１から５のいずれか１項に記載の複数の玉収容部材と、を備えたことを特徴とする。 According to such a configuration, since the connecting arm portion is bent in advance, an increase in the bending amount of the connecting arm portion can be suppressed when the ball accommodated in the ball accommodating member changes direction in the rolling element circulation path. .
On the other hand, the linear motion guide device according to the present invention has a rolling element circulation path including a guide rail having a rolling element transfer surface and a load transfer surface facing the rolling element transfer surface, and is relatively movable with respect to the guide rail. An assembled slider part, a plurality of balls that are arranged in the rolling element circulation path and circulate in accordance with the relative movement of the slider part with respect to the guide rail, and the plurality of balls are freely slidable A plurality of ball housing members according to any one of claims 1 to 5 for housing.

このような構成によれば、玉保持部の外側面の玉収容凹部の開放方向と反対方向（転動体循環路外周側）に玉保持部を摺動でき、隣接する玉によって玉保持部の前記転動体循環路外周側への動きが制限されないので、玉収容部材に収容されている玉が転動体循環路で方向転換するときに、玉保持部が転動体循環路の外周側に動くことができ、玉保持部の外側面に玉の曲面に対応する球面状凹部を形成する方法に比べ、連結腕部に作用する曲げ力を低減することができる。   According to such a configuration, the ball holding portion can be slid in the direction opposite to the opening direction of the ball receiving recess on the outer side surface of the ball holding portion (the outer periphery side of the rolling element circulation path), and the ball holding portion can be slid by the adjacent ball. Since the movement to the outer circumference side of the rolling element circulation path is not limited, the ball holding part may move to the outer circumference side of the rolling element circulation path when the ball accommodated in the ball accommodation member changes direction in the rolling element circulation path. The bending force acting on the connecting arm portion can be reduced as compared with the method of forming the spherical concave portion corresponding to the curved surface of the ball on the outer surface of the ball holding portion.

また、前記転動体循環路には、前記玉収容部材の前記１対の玉保持部の前記内側面の前記玉収容凹部に収容されている玉と前記内側面の前記玉収容凹部に収容されていない玉とを交互に配置するようにしてもよい。
このような構成によれば、転動体循環路に配置される玉の数を増大し、直動案内装置の負荷容量を大きくすることができる。 Further, the rolling element circulation path is accommodated in the balls accommodated in the ball accommodating recesses on the inner surface of the pair of ball holding portions of the ball accommodating member and the ball accommodating recesses on the inner surface. You may make it arrange | position with the ball which is not alternately.
According to such a configuration, the number of balls arranged in the rolling element circulation path can be increased, and the load capacity of the linear motion guide device can be increased.

さらに、前記転動体循環路内には、前記玉循環方向に沿って前記連結腕部の厚みよりも溝幅が広い案内溝が形成されており、前記連結腕部は、前記案内溝に摺動自在に嵌め込まれていてもよい。
このような構成によれば、案内溝に連結腕部を摺動可能に嵌め込むことで、連結腕部が案内溝から脱落することを防止でき、また、玉収容部材に収容された玉が転動体循環路内で蛇行することなく整然と循環させることができる。 Further, a guide groove having a groove width wider than the thickness of the connecting arm portion is formed along the ball circulation direction in the rolling element circulation path, and the connecting arm portion slides on the guide groove. It may be fitted freely.
According to such a configuration, the connecting arm portion can be slidably fitted into the guide groove, so that the connecting arm portion can be prevented from falling off the guide groove, and the ball accommodated in the ball accommodating member can be rolled. It can be circulated in an orderly manner without meandering in the moving body circulation path.

以下、本発明の実施形態を図面に基づいて説明する。
本発明の玉収容部材をベッド又はサドル等の固定部上でテーブル等の可動体を案内する直動案内装置に適用した実施形態を図面に基づいて説明する。
＜構成＞
図１は、本実施形態の直動案内装置１の構成を示す斜視図である。
この直動案内装置１は、図１に示すように、案内レール２、スライダー部３、複数の玉４及び複数の玉収容部材５を含んで構成される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An embodiment in which the ball housing member of the present invention is applied to a linear motion guide device that guides a movable body such as a table on a fixed portion such as a bed or a saddle will be described with reference to the drawings.
<Configuration>
FIG. 1 is a perspective view showing a configuration of a linear motion guide device 1 of the present embodiment.
As shown in FIG. 1, the linear motion guide device 1 includes a guide rail 2, a slider portion 3, a plurality of balls 4, and a plurality of ball housing members 5.

案内レール２は、細長く延ばされて断面略四角形状をなし、左右両側面には、長手方向の全長にわたって玉４が転動する際に軌道となる転動体転送面（ボール転走溝２ａ）が２条ずつ（合計４条）形成されている。
スライダー部３は、案内レール２に跨架されて（相対運動自在に組み付けられて）断面略コ字状をなし、両袖部の内面には、案内レール２の各ボール転走溝２ａに対向する４条の負荷転送面（負荷転走溝３ａ、ボール転走溝２ａとの組み合わせにより、案内レール２とスライダー部３との間に４本の負荷転走路６を形成する溝）が形成されている。 The guide rail 2 is elongated and has a substantially square shape in cross section, and on both the left and right sides, a rolling element transfer surface (ball rolling groove 2a) that becomes a track when the balls 4 roll over the entire length in the longitudinal direction. Are formed in two (four in total).
The slider portion 3 is straddled over the guide rail 2 (assembled so as to be relatively movable) and has a substantially U-shaped cross section, and the inner surfaces of both sleeve portions face each ball rolling groove 2a of the guide rail 2. 4 load transfer surfaces (grooves that form four load rolling paths 6 between the guide rail 2 and the slider portion 3 by the combination of the load rolling groove 3a and the ball rolling groove 2a) are formed. ing.

また、スライダー部３の両袖部の内部には、各負荷転走路６と対応づけられて平行に延びている４本の戻し通路７、及び互いに対応する戻し通路７と負荷転走路６とを結ぶ方向転換路８が形成されている。
そして、スライダー部３は、負荷転走路６、戻し通路７、それらを結ぶ一対の方向転換路８によって無限循環路９を構成している。
無限循環路９の内面には、玉４循環方向に沿って連結腕部１２（後述）の厚みよりも若干広い案内溝１０（玉収容部材５を案内するための溝）が形成されている。 Further, inside the sleeve portions of the slider portion 3, there are four return passages 7 corresponding to the load rolling paths 6 and extending in parallel, and a return path 7 and a load rolling path 6 corresponding to each other. A direction change path 8 to be connected is formed.
And the slider part 3 comprises the endless circulation path 9 by the load rolling path 6, the return path 7, and a pair of direction change path 8 which connects them.
On the inner surface of the endless circulation path 9, a guide groove 10 (a groove for guiding the ball housing member 5) slightly wider than the thickness of the connecting arm portion 12 (described later) is formed along the ball 4 circulation direction.

玉４は、無限循環路９内に配置され、案内レール２に対するスライダー部３の相対運動に併せて無限循環路９内を循環する。
玉収容部材５は、図２に示すように、曲げ変位が容易な合成樹脂で一体成形された玉保持部１１及び連結腕部１２を含んで構成される。
玉保持部１１は、玉４の直径よりも外径が小さい略角柱状に形成され、互いに隣り合う玉４の中心を結ぶ線上に軸線が位置するようにそれら玉４間に配置されている（１対の玉保持部１１で玉４を挟むように配置されている）。 The ball 4 is arranged in the endless circuit 9 and circulates in the endless circuit 9 in accordance with the relative movement of the slider part 3 with respect to the guide rail 2.
As shown in FIG. 2, the ball housing member 5 includes a ball holding portion 11 and a connecting arm portion 12 that are integrally formed of a synthetic resin that can be easily bent and displaced.
The ball holding portion 11 is formed in a substantially prismatic shape having an outer diameter smaller than the diameter of the ball 4 and is arranged between the balls 4 so that the axis is positioned on a line connecting the centers of the adjacent balls 4 ( It arrange | positions so that the ball 4 may be pinched | interposed by the pair of ball | bowl holding | maintenance part 11).

１対の玉保持部１１の互いに対向する内側面及び当該内側面と反対側の外側面には、玉４を収容する玉収容凹部１３、１４が形成されている。
玉保持部１１の内側面の玉収容凹部１３（球面状凹部１３）は、玉４の半径と略等しい曲率半径の球面状に形成されている（玉保持部１１の内面全体が玉４と接触している）。
玉保持部１１の外側面（１対の玉保持部１１の軸線方向の両端面）の玉収容凹部１４（Ｕ字状凹部１４）は、玉保持部１１の転動体循環路９内周側端面に開放されている。 Ball accommodating recesses 13 and 14 for accommodating the balls 4 are formed on the inner surface of the pair of ball holding portions 11 facing each other and on the outer surface opposite to the inner surface.
The ball receiving recess 13 (spherical recess 13) on the inner surface of the ball holding portion 11 is formed in a spherical shape having a radius of curvature substantially equal to the radius of the ball 4 (the entire inner surface of the ball holding portion 11 is in contact with the ball 4). is doing).
The ball receiving recess 14 (U-shaped recess 14) on the outer surface of the ball holding portion 11 (both end surfaces in the axial direction of the pair of ball holding portions 11) is the inner circumferential side end surface of the rolling element circulation path 9 of the ball holding portion 11. It is open to.

連結腕部１２は、厚みが一定の薄い帯状（平らなシート状（側面視で直線状）であり、玉４循環方向の長さが玉４の直径よりも長い帯状）に形成され、玉４の両側面（互いに隣り合う玉４の中心を結ぶ線を挟んだ両側）に同一平面上に位置するように配置され、玉４を挟んで配置されている一対の玉保持部１１の両側面にそれぞれ接続されている（１対の玉保持部１１を連結する）。   The connecting arm portion 12 is formed in a thin strip shape having a constant thickness (a flat sheet shape (straight shape in a side view), and a strip shape in which the length in the circulation direction of the balls 4 is longer than the diameter of the balls 4). On both side surfaces of the pair of ball holding portions 11 arranged so as to be located on the same plane on both side surfaces (both sides sandwiching a line connecting the centers of the adjacent balls 4). They are connected to each other (couple a pair of ball holding portions 11).

なお、連結腕部１２の接続位置は、側面視で玉４の中心を通る位置としてもよく、図３及び図４に示すように、玉４の中心からずれた位置としてもよい。
そして、玉収容部材５は、玉保持部１１の間に玉４を回転自在に組み込み、玉４と玉収容部材５とで一組のユニット１５を構成する。
ユニット１５は、玉収容部材５の連結腕部１２が無限循環路９の案内溝１０に摺動自在に嵌め合わされ、図５に示すように、そのままの玉４と交互に無限循環路９に収容されている（無限循環路９内には、玉収容部材５に収容されている玉４と玉収容部材５に収容されていない玉４とが交互に配置されている）。 The connection position of the connecting arm portion 12 may be a position passing through the center of the ball 4 in a side view, or may be a position shifted from the center of the ball 4 as shown in FIGS. 3 and 4.
Then, the ball housing member 5 rotatably incorporates the ball 4 between the ball holding portions 11, and the ball 4 and the ball housing member 5 constitute a set of units 15.
In the unit 15, the connecting arm portion 12 of the ball housing member 5 is slidably fitted in the guide groove 10 of the endless circulation path 9 and is accommodated in the endless circulation path 9 alternately with the balls 4 as shown in FIG. (In the infinite circulation path 9, the balls 4 accommodated in the ball accommodating member 5 and the balls 4 not accommodated in the ball accommodating member 5 are alternately arranged).

＜動作＞
そして、本実施形態の直動案内装置１にあっては、スライダー部３が案内レール２に沿って移動すると、玉４は、スライダー部３からの負荷を受けつつ負荷転走路６の一端から他端まで転動し、方向転換路８に掬い上げられて戻し通路７へ導かれ、反対側の方向転換路８を介して前記負荷転走路６の一端に戻される。
また、その際、玉収容部材５の連結腕部１２が案内溝１０によって規定された一定の軌道に沿って無限循環路９を移動するので、玉収容部材５に保持された玉４は、無限循環路９内で蛇行することなく整然と循環する。 <Operation>
And in the linear motion guide device 1 of this embodiment, when the slider part 3 moves along the guide rail 2, the ball | bowl 4 is the other from one end of the load rolling path 6 receiving the load from the slider part 3. It rolls to the end, is rolled up on the direction change path 8 and guided to the return path 7, and is returned to one end of the load rolling path 6 via the opposite direction change path 8.
At that time, the connecting arm portion 12 of the ball housing member 5 moves along the endless circulation path 9 along a fixed path defined by the guide groove 10, so that the balls 4 held by the ball housing member 5 are infinite. It circulates orderly without meandering in the circulation path 9.

＜作用・効果＞
（１）このように、本実施形態の玉収容部材５にあっては、１対の玉保持部１１の外側面の玉収容凹部１４を、その玉保持部１１の無限循環路９内周側端面に開放した。そのため、玉保持部１１の外側面の玉収容凹部１４の開放方向と反対方向（転動体循環路外周側）に玉保持部１１を摺動でき、隣接する玉４によって玉保持部１１の前記転動体循環路外周側への動きが制限されないので、玉収容部材５に収容されている玉４が無限循環路９で方向転換するときに、玉保持部１１が無限循環路９の外周側に動くことができ、玉保持部１１の外側面に玉４の曲面に対応する球面状凹部を形成する方法に比べ、連結腕部１２の曲げ量を低減することができ、摺動抵抗の増大を防止することができる。 <Action and effect>
(1) As described above, in the ball housing member 5 of the present embodiment, the ball housing concave portion 14 on the outer surface of the pair of ball holding portions 11 is connected to the inner circumferential side of the endless circulation path 9 of the ball holding portion 11. Opened to the end face. Therefore, the ball holding portion 11 can be slid in the direction opposite to the opening direction of the ball receiving recess 14 on the outer side surface of the ball holding portion 11 (the rolling element circulation path outer peripheral side), and the ball holding portion 11 is rotated by the adjacent ball 4. Since the movement to the outer periphery side of the moving body circulation path is not limited, the ball holding portion 11 moves to the outer periphery side of the endless circulation path 9 when the ball 4 accommodated in the ball accommodating member 5 changes direction in the endless circulation path 9. Compared with the method of forming a spherical concave portion corresponding to the curved surface of the ball 4 on the outer surface of the ball holding portion 11, the bending amount of the connecting arm portion 12 can be reduced, and an increase in sliding resistance can be prevented. can do.

また、連結腕部１２の曲げ量が低減することで、方向転換路８を通過するたびに連結腕部１２が屈曲状態となることによって生じる連結腕部１２の繰り返し曲げ疲労に対する耐久性を向上することができる。
さらに、玉保持部１１の外側面に形成したＵ字状凹部１４に隣接する玉４を嵌め込むことで、各玉４間の距離を短くすることができ、無限循環路９に配置される玉４の数を増大し、直動案内装置１の負荷容量を大きくすることができる。
ちなみに、玉保持部１１の外側面に凹部が形成されておらず、全ての玉４が玉収容部材５に収容されて直動案内装置１の無限循環路９内に配置されているものにあっては、各玉４の間の距離が長くなってしまい、負荷を支持する玉４の数が制限されることになり、直動案内装置１の負荷容量が低下する恐れがある。 Further, by reducing the amount of bending of the connecting arm portion 12, the durability against repeated bending fatigue of the connecting arm portion 12 caused by the connecting arm portion 12 being bent every time it passes through the direction change path 8 is improved. be able to.
Furthermore, the distance between each ball | bowl 4 can be shortened by inserting the ball | bowl 4 adjacent to the U-shaped recessed part 14 formed in the outer surface of the ball | bowl holding | maintenance part 11, and the ball | bowl arrange | positioned in the infinite circulation path 9 The number of 4 can be increased and the load capacity of the linear motion guide device 1 can be increased.
Incidentally, there is no recess formed on the outer surface of the ball holding portion 11, and all the balls 4 are accommodated in the ball accommodating member 5 and arranged in the infinite circulation path 9 of the linear motion guide device 1. As a result, the distance between the balls 4 becomes longer, the number of balls 4 supporting the load is limited, and the load capacity of the linear guide device 1 may be reduced.

（２）なお、本実施形態では、玉保持部１１の内側面に球面状凹部１３を形成し、玉保持部１１の内側面の全体が玉４と接触する構成としたが、例えば、球面状凹部１３としては、図６及び図７に示すように、玉保持部１１の無限循環路９内周側端面及び外周側端面のうちいずれか一方に玉４を挿通可能な開口部１６を有するものであってもよい（玉保持部１１の無限循環路内周側又は外周側のいずれか一方が玉４と接触する構成でもよい）。そのようにすれば、玉４を挿通可能な開口部１６がないものに比べ、直動案内装置１の組み立て時に、玉収容凹部１４に玉４を収容して無限循環路９に配置する作業を容易に行うことができる。 (2) In the present embodiment, the spherical concave portion 13 is formed on the inner side surface of the ball holding portion 11 so that the entire inner side surface of the ball holding portion 11 is in contact with the ball 4. As shown in FIG. 6 and FIG. 7, the recess 13 has an opening 16 through which the ball 4 can be inserted into either the inner peripheral side end face or the outer peripheral side end face of the endless circulation path 9 of the ball holding part 11. (It may be configured such that either the inner circumferential side or the outer circumferential side of the endless circulation path of the ball holding portion 11 is in contact with the ball 4). If it does so, compared with what does not have the opening part 16 which can penetrate the ball | bowl 4, the operation | work which accommodates the ball | bowl 4 in the ball | bowl accommodation recessed part 14, and arrange | positions it in the infinite circulation path 9 at the time of the assembly of the linear motion guide apparatus 1. It can be done easily.

（３）また、球面状凹部１３としては、図８に示すように、玉保持部１１の無限循環路９内周側端面及び外周側端面の両方に玉４を挿通可能な開口部１７を有するものであってもよい。そのようにすれば、玉４を挿通可能な開口部１６がないものに比べ、直動案内装置１の組み立て時に、玉収容凹部１４に玉４を収容して無限循環路９に配置する作業を容易に行うことができる。
（４）さらに、連結腕部１２の玉４循環方向の長さは、玉４の直径より長くした。そのため、無限循環路９内に形成される案内溝１０に連結腕部１２を摺動可能に嵌め込んだときに、案内溝１０によって拘束される長さを長くすることができ、玉収容部材５をより安定して案内し、連結腕部１２が案内溝１０から脱落することを防止できる。 (3) Moreover, as the spherical recessed part 13, as shown in FIG. 8, it has the opening part 17 which can penetrate the ball | bowl 4 in both the inner peripheral side end surface and the outer peripheral side end surface of the infinite circulation path 9 of the ball | bowl holding | maintenance part 11. It may be a thing. If it does so, compared with what does not have the opening part 16 which can penetrate the ball | bowl 4, the operation | work which accommodates the ball | bowl 4 in the ball | bowl accommodation recessed part 14, and arrange | positions it in the infinite circulation path 9 at the time of the assembly of the linear motion guide apparatus 1. It can be done easily.
(4) Further, the length of the connecting arm 12 in the circulation direction of the balls 4 is longer than the diameter of the balls 4. Therefore, when the connecting arm portion 12 is slidably fitted into the guide groove 10 formed in the endless circulation path 9, the length restrained by the guide groove 10 can be increased, and the ball housing member 5 Can be more stably guided, and the connecting arm portion 12 can be prevented from falling out of the guide groove 10.

（５）なお、本実施形態では、連結腕部１２として、平らなシート状のものを用いる例を示したが、これに限られるものではない。例えば、図９及び図１０に示すように、無限循環路９外周側に凸状に曲がっているものを用いてもよい。そのようにすれば、連結腕部１２が予め凸状に曲がっているため、玉収容部材５に収容されている玉４が無限循環路９で方向転換するときに、連結腕部１２の曲げ量の増大を抑制し、摺動抵抗の増大を防止することができる。
また、玉保収容部材５の連結腕部１２を玉４の両側面に配置する例を示したが、これに限られるものではない。例えば、図１１に示すように、玉４の一方の側面にのみ配置するようにしてもよい。そのようにすれば、連結腕部１２を玉４の両側面に配置する方法に比べ、方向転換路８で曲がりやすくなり、方向転換路８での動きがより柔軟になる。 (5) In the present embodiment, an example in which a flat sheet-like member is used as the connecting arm portion 12 has been described. However, the present invention is not limited to this. For example, as shown in FIG.9 and FIG.10, you may use what is curving convexly in the endless circulation path 9 outer peripheral side. By doing so, since the connecting arm portion 12 is bent in a convex shape in advance, the bending amount of the connecting arm portion 12 when the ball 4 housed in the ball housing member 5 changes direction in the endless circulation path 9. Can be suppressed, and an increase in sliding resistance can be prevented.
Moreover, although the example which arrange | positions the connection arm part 12 of the ball holding accommodation member 5 on the both sides | surfaces of the ball 4 was shown, it is not restricted to this. For example, as shown in FIG. 11, the ball 4 may be disposed only on one side surface. If it does so, compared with the method of arrange | positioning the connection arm part 12 on the both sides | surfaces of the ball 4, it will become easy to bend | curve in the direction change path 8, and the movement in the direction change path 8 becomes more flexible.

（６）さらに、本発明に係る直動案内装置は、１対の玉保持部１１の外側面の玉収容凹部１４を、その玉保持部１１の無限循環路９内周側端面に開放した。そのため、玉保持部１１の外側面の玉収容凹部１４の開放方向と反対方向（転動体循環路外周側）に玉保持部１１を摺動でき、隣接する玉４によって玉保持部１１の前記転動体循環路外周側への動きが制限されないので、玉収容部材５に収容されている玉４が無限循環路９で方向転換するときに、玉保持部１１が無限循環路９の外周側に動くことができ、玉保持部１１の外側面に玉４の曲面に対応する球面状凹部を形成する方法に比べ、連結腕部１２の曲げ量を低減することができ、摺動抵抗の増大を防止することができる。 (6) Furthermore, the linear motion guide device according to the present invention opens the ball receiving recesses 14 on the outer side surfaces of the pair of ball holding portions 11 to the end surface on the inner peripheral side of the endless circulation path 9 of the ball holding portion 11. Therefore, the ball holding portion 11 can be slid in the direction opposite to the opening direction of the ball receiving recess 14 on the outer side surface of the ball holding portion 11 (the rolling element circulation path outer peripheral side), and the ball holding portion 11 is rotated by the adjacent ball 4. Since the movement to the outer periphery side of the moving body circulation path is not limited, the ball holding portion 11 moves to the outer periphery side of the endless circulation path 9 when the ball 4 accommodated in the ball accommodating member 5 changes direction in the endless circulation path 9. Compared with the method of forming a spherical concave portion corresponding to the curved surface of the ball 4 on the outer surface of the ball holding portion 11, the bending amount of the connecting arm portion 12 can be reduced, and an increase in sliding resistance can be prevented. can do.

（７）また、無限循環路９には、玉収容部材５に収容されている玉４と玉収容部材５に収容されていない玉４とを交互に配置するようにした。そのため、無限循環路９に配置される玉４の数を増大し、直動案内装置１の負荷容量を大きくすることができる。また、玉４同士の相互接触を防止し、玉４の転動時の騒音及び摩擦を抑制することができる。
なお、玉４の配置状態としては、負荷容量の観点及び玉４同士の衝突による騒音の観点から交互に配置することが望ましいが、各種部品の寸法誤差や膨潤等により、無限循環路９の経路長を一定で且つ精度を抑えることは難しい。そのため、玉収容部材５に収容されている玉４と玉収容部材５に収容されていない玉４とを必ずしも全部交互に配置しなくてもよく、寸法誤差等との兼ね合いから、図１２及び図１３に示すように、部分的には、玉４同士が隣接したり、玉収容部材５に収容されている玉４同士が隣接したりしてもよい。そのようにすれば、玉収容部材５に収容されている玉４と玉収容部材５に収容されていない玉４とを交互に配置できるように無限循環路９の長さやスライダー部３の長さを調整する必要がなく、前記交互に配置する方法に比べ、精度を粗くすることができる。 (7) Further, in the endless circulation path 9, the balls 4 accommodated in the ball accommodating member 5 and the balls 4 not accommodated in the ball accommodating member 5 are alternately arranged. Therefore, the number of balls 4 arranged in the endless circulation path 9 can be increased, and the load capacity of the linear motion guide device 1 can be increased. Further, mutual contact between the balls 4 can be prevented, and noise and friction during rolling of the balls 4 can be suppressed.
As the arrangement state of the balls 4, it is desirable to arrange them alternately from the viewpoint of load capacity and the noise caused by the collision between the balls 4, but the path of the infinite circuit 9 due to dimensional errors and swelling of various parts. It is difficult to keep the length constant and accuracy. For this reason, the balls 4 accommodated in the ball accommodating member 5 and the balls 4 not accommodated in the ball accommodating member 5 do not necessarily have to be alternately arranged. As shown in FIG. 13, the balls 4 may be partially adjacent to each other, or the balls 4 accommodated in the ball accommodating member 5 may be adjacent to each other. If it does so, the length of the endless circulation path 9 and the length of the slider part 3 so that the ball 4 accommodated in the ball accommodating member 5 and the ball 4 not accommodated in the ball accommodating member 5 can be arranged alternately. There is no need to adjust the accuracy, and the accuracy can be roughened compared to the method of alternately arranging.

（８）さらに、無限循環路９内に、玉４循環方向に沿って連結腕部１２の厚みよりも溝幅が広い案内溝１０を形成し、その案内溝１０に連結腕部１２を摺動自在に嵌め込むようにした。そのため、案内溝１０に連結腕部１２を摺動可能に嵌め込むことで、連結腕部１２が案内溝１０から脱落することを防止でき、また、玉収容部材５に収容された玉４が無限循環路９内で蛇行することなく整然と循環させることができる。 (8) Furthermore, a guide groove 10 having a groove width wider than the thickness of the connecting arm portion 12 is formed in the endless circulation path 9 along the circulation direction of the ball 4, and the connecting arm portion 12 is slid in the guide groove 10. I tried to fit it freely. Therefore, by slidably fitting the connecting arm portion 12 into the guide groove 10, it is possible to prevent the connecting arm portion 12 from falling off the guide groove 10, and the balls 4 accommodated in the ball accommodating member 5 are infinite. It is possible to circulate orderly without meandering in the circulation path 9.

本実施形態の直動案内装置の構成を示す斜視図である。It is a perspective view which shows the structure of the linear motion guide apparatus of this embodiment. 玉保持部の構成を示す斜視図である。It is a perspective view which shows the structure of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す側面図である。It is a side view which shows the modification of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す側面図である。It is a side view which shows the modification of a ball | bowl holding | maintenance part. 玉の配置状態を説明するための説明図である。It is explanatory drawing for demonstrating the arrangement | positioning state of a ball | bowl. 玉保持部の変形例を示す側面図である。It is a side view which shows the modification of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す側面図である。It is a side view which shows the modification of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す平面図である。It is a top view which shows the modification of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す側面図である。It is a side view which shows the modification of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す側面図である。It is a side view which shows the modification of a ball | bowl holding | maintenance part. 玉保持部の変形例を示す平面図である。It is a top view which shows the modification of a ball | bowl holding | maintenance part. 玉の配置状態の変形例を説明するための説明図である。It is explanatory drawing for demonstrating the modification of the arrangement state of a ball | bowl. 玉の配置状態の変形例を説明するための説明図である。It is explanatory drawing for demonstrating the modification of the arrangement state of a ball | bowl.

符号の説明Explanation of symbols

１は直動案内装置、２は案内レール、２ａはボール転走溝、３はスライダー部、３ａは負荷転走溝、４は玉、５は玉収容部材、５は玉保収容部材、６は負荷転走路、７は戻し通路、８は方向転換路、９は無限循環路、１０は案内溝、１１は玉保持部、１２は連結腕部、１３は球面状凹部、１４はＵ字状凹部、１５はユニット、１６は開口部、１７は開口部 1 is a linear motion guide device, 2 is a guide rail, 2a is a ball rolling groove, 3 is a slider part, 3a is a load rolling groove, 4 is a ball, 5 is a ball housing member, 5 is a ball holding housing member, Load rolling path, 7 is a return path, 8 is a direction change path, 9 is an endless circulation path, 10 is a guide groove, 11 is a ball holding part, 12 is a connecting arm part, 13 is a spherical recess, and 14 is a U-shaped recess. , 15 is a unit, 16 is an opening, and 17 is an opening.

Claims (8)

転動体循環路を転動する玉を挟んで配置される１対の玉保持部と、前記１対の玉保持部を連結する連結腕部と、を備え、
前記１対の玉保持部の互いに対向する内側面及び当該内側面と反対側の外側面には、玉を収容する玉収容凹部が形成されており、
前記１対の玉保持部の前記外側面の前記玉収容凹部は、その玉保持部の前記転動体循環路内周側端面に開放されていることを特徴とする玉収容部材。 A pair of ball holding portions arranged across a ball rolling on the rolling element circulation path, and a connecting arm portion connecting the pair of ball holding portions,
A ball housing recess for housing a ball is formed on the inner side surface and the outer side surface opposite to the inner side surface of the pair of ball holding portions,
The ball housing member, wherein the ball housing concave portion on the outer side surface of the pair of ball holding portions is open to the rolling element circulation path inner peripheral side end surface of the ball holding portion. 前記１対の玉保持部の前記内側面の前記玉収容凹部は、その玉保持部の前記転動体循環路内周側端面及び外周側端面のうちいずれか一方に前記玉を挿通可能な開口部を有することを特徴とする請求項１に記載の玉収容部材。   The ball receiving recess on the inner surface of the pair of ball holding portions is an opening through which the ball can be inserted into one of the rolling element circulation path inner peripheral side end surface and outer peripheral side end surface of the ball holding portion. The ball receiving member according to claim 1, comprising: 前記１対の玉保持部の前記内側面の前記玉収容凹部は、その玉保持部の前記転動体循環路内周側端面及び外周側端面の両方に前記玉を挿通可能な開口部を有することを特徴とする請求項１に記載の玉収容部材。   The ball receiving recesses on the inner side surfaces of the pair of ball holding portions have openings through which the balls can be inserted into both the inner circumferential side end surface and the outer circumferential side end surface of the rolling element circulation path of the ball holding portion. The ball receiving member according to claim 1. 前記連結腕部の前記玉循環方向の長さは、前記玉の直径より長いことを特徴とする請求項１から３のいずれか１項に記載の玉収容部材。   The ball receiving member according to any one of claims 1 to 3, wherein a length of the connecting arm portion in the ball circulation direction is longer than a diameter of the ball. 前記連結部は、前記転動体循環路外周側に凸状に曲がっていることを特徴とする請求項１から４のいずれか１項に記載の玉収容部材。   The ball receiving member according to any one of claims 1 to 4, wherein the connecting portion is bent in a convex shape toward an outer peripheral side of the rolling element circulation path. 転動体転送面を有する案内レールと、前記転動体転送面に対向する負荷転送面を含む転動体循環路を有し前記案内レールに相対運動自在に組み付けられたスライダー部と、前記転動体循環路内に配置され前記案内レールに対する前記スライダー部の相対運動に併せて循環する転動体である複数の玉と、前記複数の玉を回転摺動自在に収容する前記請求項１から５のいずれか１項に記載の複数の玉収容部材と、を備えたことを特徴とする直動案内装置。   A guide rail having a rolling element transfer surface; a slider part having a rolling element circulation path including a load transfer surface facing the rolling element transfer surface; and a slider portion assembled to the guide rail so as to be relatively movable; and the rolling element circulation path The ball according to any one of claims 1 to 5, wherein a plurality of balls that are rolling elements that are circulated in association with a relative motion of the slider portion with respect to the guide rail and the plurality of balls are rotatably slidably accommodated. A linear motion guide device comprising the plurality of ball housing members according to claim. 前記転動体循環路には、前記玉収容部材に収容されている玉と前記玉収容部材に収容されていない玉とが交互に配置されていることを特徴とする請求項６に記載の直動案内装置。   The linear motion according to claim 6, wherein the balls accommodated in the ball accommodating member and the balls not accommodated in the ball accommodating member are alternately arranged in the rolling element circulation path. Guide device. 前記転動体循環路内には、前記玉循環方向に沿って前記連結腕部の厚みよりも溝幅が広い案内溝が形成されており、
前記連結腕部は、前記案内溝に摺動自在に嵌め込まれていることを特徴とする請求項６又は７に記載の直動案内装置。 In the rolling element circulation path, a guide groove having a groove width wider than the thickness of the connecting arm portion is formed along the ball circulation direction,
The linear motion guide device according to claim 6 or 7, wherein the connecting arm portion is slidably fitted into the guide groove.
JP2006309318A 2006-11-15 2006-11-15 Ball housing member and linear motion guide device Pending JP2008121861A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518351A1 (en) * 2011-04-29 2012-10-31 Aktiebolaget SKF Holder for a roller body of a linear roller bearing
EP2518352A1 (en) * 2011-04-29 2012-10-31 Aktiebolaget SKF Linear roller bearing
CN105648705A (en) * 2014-11-25 2016-06-08 青岛海尔洗衣机有限公司 Washing machine balancing ring and washing machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518351A1 (en) * 2011-04-29 2012-10-31 Aktiebolaget SKF Holder for a roller body of a linear roller bearing
DE102011017760A1 (en) * 2011-04-29 2012-10-31 Aktiebolaget Skf Holder for a rolling element of a linear roller bearing
EP2518352A1 (en) * 2011-04-29 2012-10-31 Aktiebolaget SKF Linear roller bearing
DE102011017760B4 (en) * 2011-04-29 2013-04-25 Aktiebolaget Skf Holder for a rolling element of a linear roller bearing
CN105648705A (en) * 2014-11-25 2016-06-08 青岛海尔洗衣机有限公司 Washing machine balancing ring and washing machine

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