JPS61193229U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は第１の実施例の横断面図、第２図はス
プライン軸の実施例の端面図、第３図は同上斜視
図、第４図は第１の実施例でスプライン軸を取外
した軸心縦断面図、第５図は同上負荷路部分縦断
面図、第６図は同上外筒のみの軸心縦断面図、第
７図は応用例の横断面図、第８図は第２の実施例
の横断面図、第９図は同上部分拡大横断面図、第
１０図は第８図中外筒のみの―線断面図、第
１１図は同上外筒内周面側無限循環路部分立面図
、第１２図、第１３図はそれぞれ従来例の横断面
図である。 １，２３：外筒、２，２４：負荷路、３，２５
：リターン路、４：ボール、５，２６：方向転換
路、６，２７：スプライン軸、７：截頭頂面、８
：側面、９：転動軌道、１０，２８：負荷軌道、
１１：負荷溝、１２：無負荷溝、１３：保持器、
１４：保持器内周面、１５：スプライン軸外側面
、３０：側筒。 Figure 1 is a cross-sectional view of the first embodiment, Figure 2 is an end view of the spline shaft embodiment, Figure 3 is a perspective view of the same as above, and Figure 4 is the first embodiment with the spline shaft removed. 5 is a partial vertical sectional view of the load path, FIG. 6 is a longitudinal sectional view of the axial center of the outer cylinder only, FIG. 7 is a cross-sectional view of an application example, and FIG. FIG. 9 is an enlarged cross-sectional view of the same part, FIG. 10 is a cross-sectional view of only the outer cylinder in FIG. The elevation view, FIGS. 12 and 13 are cross-sectional views of the conventional example. 1, 23: Outer cylinder, 2, 24: Load path, 3, 25
: return path, 4: ball, 5, 26: direction change path, 6, 27: spline shaft, 7: truncated top surface, 8
: Side surface, 9: Rolling raceway, 10, 28: Load raceway,
11: Load groove, 12: No-load groove, 13: Cage,
14: Inner peripheral surface of cage, 15: Outer surface of spline shaft, 30: Side cylinder.

Claims (1)

【実用新案登録請求の範囲】 １ 外筒内に、負荷路とリターン路との両直線路
および該両直線路の両端を連結してボール群を無
限循環せしめうる方向転換路よりなる無限循環路
が複数組形成され、前記外筒が、内装されるボー
ル群を介して、回動することなく軸方向に走行自
在に、スプライン軸に装架されてなるボールスプ
ライン軸受において、スプライン軸は、軸と直角
断面が略截頭正三角形で截頭頂面幅の大きな柱体
とされ、該柱体の３側面の両側縁に軸方向にそれ
ぞれ転動軌道が凹設され、外筒の内周面に、前記
転動軌道と正対して負荷軌道が凹設され、該負荷
軌道と前記転動軌道によりそれぞれボール群を転
動可能に挾持する６本の負荷路が等間隔に近く形
成され、また前記外筒には、前記スプライン軸の
各側面と対峙する位置で、前記両負荷軌道の中間
にボール群のリターン路が軸方向に２本宛隣接形
成されていることを特徴とするボールスプライン
軸受。 ２ 外筒の内周面に３本の浅いＵ字状の幅の広い
負荷溝がそれぞれスプライン軸の截頭頂面および
該頂面の両サイドの転動軌道にわたつて対峙する
幅に凹設され、前記負荷溝の両側縁に前記スプラ
イン軸の転動軌道と正対する負荷軌道が凹設され
、また外筒の内周面の前記３本の負荷溝の間に、
前記負荷溝より幅狭で且つより深くないＵ字状の
無負荷溝が前記スプライン軸の各側面に対峙して
凹設され、前記外筒の内周面に前記各負荷溝およ
び各無負荷溝にわたり保持器が嵌着され、該保持
器の内周面はスプライン軸の全外側面と間隔を存
して略同形孔とされ、前記無負荷溝内の保持器に
はリターン路が凹設され、また方向転換路も該保
持器に凹設されている実用新案登録請求の範囲第
１項記載のボールスプライン軸受。 ３ 負荷軌道およびリターン路の両直線路が外筒
内周面に直接凹設され、外筒の進行方向の両端に
各方向転換路が穿設されている側筒が取付けられ
ている実用新案登録請求の範囲第１項記載のボー
ルスプライン軸受。[Scope of Claim for Utility Model Registration] 1. An endless circulation path in the outer cylinder, consisting of both straight paths, a load path and a return path, and a direction change path that connects both ends of the straight paths to allow a group of balls to circulate endlessly. In a ball spline bearing, the outer cylinder is mounted on a spline shaft so as to be freely movable in the axial direction without rotation via a group of balls contained therein. The columnar body has a substantially truncated regular triangular cross section and a large truncated top surface width, and rolling tracks are recessed in the axial direction on both edges of three sides of the columnar body, and on the inner circumferential surface of the outer cylinder. , a load track is recessed directly opposite the rolling track, and the load track and the rolling track form six load paths, each of which holds a group of balls in a rolling manner, at nearly equal intervals; A ball spline bearing characterized in that two return paths for a group of balls are formed adjacent to each other in the axial direction in the middle of both load tracks in the outer cylinder at positions facing each side surface of the spline shaft. 2. Three shallow U-shaped wide load grooves are recessed in the inner circumferential surface of the outer cylinder, each extending across the truncated top surface of the spline shaft and the rolling raceway on both sides of the top surface, and having a width that faces each other. , a load track that directly faces the rolling track of the spline shaft is recessed on both side edges of the load groove, and between the three load grooves on the inner circumferential surface of the outer cylinder,
U-shaped non-load grooves that are narrower and less deep than the load grooves are recessed facing each side surface of the spline shaft, and each of the load grooves and each non-load groove is formed on the inner circumferential surface of the outer cylinder. A retainer is fitted over the entire length of the retainer, the inner peripheral surface of the retainer is formed into a hole of approximately the same shape as the entire outer surface of the spline shaft with a gap therebetween, and a return path is recessed in the retainer in the no-load groove. The ball spline bearing according to claim 1, wherein the direction change path is also recessed in the retainer. 3 Utility model registration in which both the load track and the return path are directly recessed into the inner circumferential surface of the outer cylinder, and a side cylinder is installed with direction change paths bored at both ends of the outer cylinder in the direction of travel. A ball spline bearing according to claim 1.