JPS628649B2 - - Google Patents
Info
- Publication number
- JPS628649B2 JPS628649B2 JP56162037A JP16203781A JPS628649B2 JP S628649 B2 JPS628649 B2 JP S628649B2 JP 56162037 A JP56162037 A JP 56162037A JP 16203781 A JP16203781 A JP 16203781A JP S628649 B2 JPS628649 B2 JP S628649B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- ball guide
- groove
- cylinder
- grooves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 210000002105 tongue Anatomy 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 210000005182 tip of the tongue Anatomy 0.000 description 1
Classifications
-
- 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
- F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
- F16C29/0692—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a guide rail or track of non-circular cross-section, e.g. with grooves or protrusions, i.e. the linear bearing is suited to transmit torque
- F16C29/0695—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a guide rail or track of non-circular cross-section, e.g. with grooves or protrusions, i.e. the linear bearing is suited to transmit torque with balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
Description
【発明の詳細な説明】
この発明は軸方向運動とトルク伝達の回転運動
とを単独又は同時に行い得るボールスプライン軸
受に関し、特に前記運動により摩耗等を生じた場
合にスプライン軸の挿入角度位置を変えて使用寿
命を倍加し得るボールスプライン軸受の構造に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball spline bearing that can perform axial movement and rotational movement for transmitting torque, either singly or simultaneously, and in particular, when the movement causes wear etc., the insertion angular position of the spline shaft can be changed. The present invention relates to the structure of a ball spline bearing that can double its service life.
第１図は従来のボールスプライン軸受の断面構
造を示し、円筒１の内壁に、軸心方向に延長する
Ｕ字形断面のトルク伝達用負荷ボール案内溝２
と、該案内溝２より深い無負荷ボール案内溝３と
を円周方向に交互に形成し、各案内溝２，３内に
２列に挿入したボール４をリテーナ５により円筒
１から脱落させないで軸方向に転動可能に支持す
る。但しリテーナ５の案内溝２に相対する部分に
おいては、リテーナ５がボール４を案内溝２の両
側転走面６に接せしめるよう軸方向の案内溝内に
保持すると共に、該案内溝内に設けた長孔からボ
ール４の一部をリテーナ５の内側に露出させ、リ
テーナ５の内側に挿入したスプライン軸７には前
記露出した各１対のボール４に対する転送面８を
両側に形成した突条９を設け、転走面６，８とそ
の間のボール４を介してスプライン軸７と円筒１
間にトルク伝達を行うのである。案内溝２内の１
列のボール４ａとこれと相隣る案内溝３内の１列
のボール４ｂは、案内溝２，３の両端において円
筒１の内壁とリテーナ５の外面とによつて形成さ
れた図示しない連絡路によつて互に移動可能であ
り、スプライン軸７の軸方向運動に従つてボール
４は自由に軸方向に転動移動する。 Fig. 1 shows the cross-sectional structure of a conventional ball spline bearing, in which a load ball guide groove 2 for torque transmission with a U-shaped cross section extending in the axial direction is formed on the inner wall of a cylinder 1.
and unloaded ball guide grooves 3 deeper than the guide grooves 2 are formed alternately in the circumferential direction, and the balls 4 inserted in two rows in each guide groove 2 and 3 are prevented from falling out of the cylinder 1 by a retainer 5. It is supported so that it can roll in the axial direction. However, in the portion of the retainer 5 facing the guide groove 2, the retainer 5 holds the balls 4 in the axial guide groove so as to contact the rolling surfaces 6 on both sides of the guide groove 2, and the retainer 5 also holds the balls 4 in the guide groove in the axial direction. A part of the balls 4 is exposed inside the retainer 5 through the elongated hole, and the spline shaft 7 inserted into the inside of the retainer 5 has a protrusion formed on both sides with transfer surfaces 8 for each pair of exposed balls 4. 9 is provided, and the spline shaft 7 and the cylinder 1 are connected via the raceway surfaces 6 and 8 and the ball 4 between them.
Torque is transmitted between them. 1 in guide groove 2
A row of balls 4a and a row of balls 4b in the adjacent guide groove 3 are connected to a communication path (not shown) formed by the inner wall of the cylinder 1 and the outer surface of the retainer 5 at both ends of the guide grooves 2 and 3. According to the axial movement of the spline shaft 7, the balls 4 freely roll and move in the axial direction.
以上のように、従来のボールスプライン軸受
は、案内溝３が案内溝２より深いため円筒１の外
径が大となる上に、案内溝２，３の加工が甚だ面
倒であり、更に、転走面６に疲労剥離を生ずれば
使用不能になる欠点がある。 As described above, in the conventional ball spline bearing, the guide groove 3 is deeper than the guide groove 2, so the outer diameter of the cylinder 1 is large, and the machining of the guide grooves 2 and 3 is extremely troublesome. There is a drawback that if fatigue peeling occurs on the running surface 6, it becomes unusable.
本発明の目的は従来の上記欠点を除去し、トル
ク伝達を行う転走面が疲労剥離したときは、スプ
ライン軸の挿入角度位置を変えて使用寿命を倍加
し得るボールスプライン軸受を提供するにある。 An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional ball spline bearing, and to provide a ball spline bearing that can double the service life by changing the insertion angle position of the spline shaft when the raceway surface that transmits torque peels off due to fatigue. .
以下本発明の実施例を図面を参照して説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
軸受のアウターレースとなる円筒１０は円周方
向に同一深さで等間隔に形成した4n個（本実施
例では12個）のほぼ半円形のボール案内溝１１を
有し、これらの案内溝１１の両端は円筒１０の両
端部に案内溝１１より僅か深く形成した環状溝１
２に円錐面１３を介して連通する。 The cylinder 10 serving as the outer race of the bearing has 4n (12 in this embodiment) approximately semicircular ball guide grooves 11 formed at equal intervals and at the same depth in the circumferential direction. An annular groove 1 is formed at both ends of the cylinder 10 to be slightly deeper than the guide groove 11.
2 through a conical surface 13.
円筒１０内に嵌入固定されるリテーナ１４は、
一体又はＮ個に分割され、その外周面１５のうち
案内溝１１に面する部分にｎ個の厚肉部１６とそ
の中間のｎ個の薄肉部１７とを有し、厚肉部１６
の外周面に案内溝１１と共にボール１８の通路を
形成する中央部の２個のボール案内支持溝１９と
両端のボール案内支持溝２０とを有する。案内溝
２０の薄肉部１７に面する一半にボール１８を案
内支持溝２０外に一部分露出させて保持する長孔
２１を設ける。リテーナ外周面１５に、相隣る各
１対の案内支持溝１９，２０の端を連絡するほぼ
半円形断面の案内溝２２を形成し、案内溝２２と
環状溝１２とによつて案内支持溝２０内のボール
１８を案内支持溝１９内へ導出入させるほぼ半円
形状の通路２３を形成する。 The retainer 14 that is fitted and fixed into the cylinder 10 is
It is integrated or divided into N parts, and has n thick parts 16 on the part facing the guide groove 11 of the outer circumferential surface 15 and n thin parts 17 in between.
It has two ball guide and support grooves 19 at the center and ball guide and support grooves 20 at both ends, which together with the guide groove 11 form a passage for the ball 18 on the outer peripheral surface of the ball. A long hole 21 is provided in one half of the guide groove 20 facing the thin wall part 17 to hold the ball 18 with a part thereof exposed outside the guide support groove 20. A guide groove 22 having a substantially semicircular cross section is formed on the outer circumferential surface 15 of the retainer to connect the ends of each pair of adjacent guide support grooves 19 and 20, and the guide groove 22 and the annular groove 12 form a guide groove 22. A substantially semicircular passage 23 is formed through which the ball 18 in the groove 20 is guided into and out of the guide support groove 19.
ボール１８の通路２３内への移動を容易ならし
めるため、長孔２１の両端に、ボール１８を掬い
上げる舌片２４を突設する。舌片２４は先端が円
錐面１３とほぼ平行する斜面をもつてナイフエツ
ジ状に形成される。 In order to facilitate the movement of the ball 18 into the passage 23, tongues 24 for scooping up the ball 18 are protrudingly provided at both ends of the elongated hole 21. The tip of the tongue piece 24 is formed into a knife edge shape with an inclined surface substantially parallel to the conical surface 13.
２５はリテーナ外周面１５の両端に形成した回
り止め突起で、これを円筒１０の内面に形成した
溝内に嵌入させ、リテーナ１４の両端を止め輪２
６（第２図）により円筒１０に固定したとき、相
隣る各１対のボール案内支持溝１９，２０と１対
のボール案内溝１１と通路２３とは2n個のボー
ル循環通路２７を形成する。 Reference numeral 25 denotes anti-rotation protrusions formed at both ends of the outer circumferential surface 15 of the retainer, which are fitted into grooves formed on the inner surface of the cylinder 10, and both ends of the retainer 14 are connected to the retaining ring 2.
6 (FIG. 2), each pair of adjacent ball guide support grooves 19, 20 and a pair of ball guide grooves 11 and passages 23 form 2n ball circulation passages 27. do.
リテーナ１４は一体に形成しても、分割型に形
成してもよく、材料としては合成樹脂、鋼板、ダ
イキヤスト、焼結材、含油材等を用いることがで
きる。 The retainer 14 may be formed integrally or in a split type, and may be made of synthetic resin, steel plate, die cast, sintered material, oil-impregnated material, or the like.
リテーナ１４を円筒１０内に挿入しつつ循環通
路２７内にボール１８を充填して、上記の如く円
筒１０に止め輪２６で固定したのち、リテーナ１
４内にスプライン軸２８を挿入する。スプライン
軸２８は軸方向のｎ個の突条２９を有し、その両
側面は薄肉部１７の両側において長孔２１から露
出するボール１８に接する湾曲した転走面３０と
なつてスプライン軸２８を円筒１０と同心に保持
してスプライン軸２８の軸方向運動を案内すると
共に、転走面３０は該ボール１８を介してボール
案内溝１１の一半の内面にトルクを伝達する作用
をなす。 After inserting the retainer 14 into the cylinder 10, filling the circulation passage 27 with balls 18, and fixing it to the cylinder 10 with the retaining ring 26 as described above, the retainer 14 is inserted into the cylinder 10.
4. Insert the spline shaft 28 into the shaft 4. The spline shaft 28 has n protrusions 29 in the axial direction, and both side surfaces of the spline shaft 28 form curved rolling surfaces 30 that contact the balls 18 exposed from the long holes 21 on both sides of the thin wall portion 17. The raceway surface 30 is held concentrically with the cylinder 10 and guides the axial movement of the spline shaft 28, and also functions to transmit torque to the inner surface of one half of the ball guide groove 11 via the ball 18.
スプライン軸２８の軸方向運動に伴い、転走面
３０に接するボール１８は軸方向に転動し、舌片
２４は該ボール１８を掬い上げて通路２３内への
移動を容易ならしめる。したがつて、環状溝１２
はボール案内溝１１より舌片２４の厚さ程度に僅
か深く形成すればよく、環状溝１２を形成しても
円筒１０の外径を特に大ならしめる必要は生じな
い。 As the spline shaft 28 moves in the axial direction, the balls 18 in contact with the raceway surface 30 roll in the axial direction, and the tongues 24 scoop up the balls 18 to facilitate their movement into the passage 23. Therefore, the annular groove 12
need only be formed slightly deeper than the ball guide groove 11 by the thickness of the tongue piece 24, and even if the annular groove 12 is formed, there is no need to particularly increase the outer diameter of the cylinder 10.
循環通路２７を構成する１対のボール案内溝１
１の一方のボール案内溝１１Ａ１，１１Ｂ１，１
１Ｃ１，１１Ｄ１，１１Ｅ１，１１Ｆ１等（第７
図）はトルク伝達に関与するが、他方のボール案
内溝１１Ａ２，１１Ｂ２，１１Ｃ２，１１Ｄ２，
１１Ｅ２，１１Ｆ２等は単にボール１８の案内作
用のみをなし、トルク伝達には関与しない。した
がつてトルク伝達によりボール案内溝１１Ａ１〜
１１Ｆ１等の前記一半の内面に疲労剥離を生ずる
ことがある。この場合はスプライン軸２８を抜き
出してリテーナ１４を円筒１０内から取外し、リ
テーナ１４をボール案内溝１１の２ピツチ分だけ
左又は右に回動して再度円筒１０内に嵌入固定し
（第８図）、ついでスプライン軸２８を挿入する。
しかるときはボール案内溝１１Ａ１〜１１Ｆ１等
に代つてボール案内溝１１Ａ２〜１１Ｆ２等がト
ルク伝達を行うから、スプライン軸受としての寿
命は倍加される。 A pair of ball guide grooves 1 forming the circulation passage 27
One ball guide groove 11A1, 11B1, 1 of 1
1C1, 11D1, 11E1, 11F1, etc. (7th
Fig.) is involved in torque transmission, but the other ball guide groove 11A2, 11B2, 11C2, 11D2,
11E2, 11F2, etc. only serve to guide the ball 18 and are not involved in torque transmission. Therefore, due to torque transmission, the ball guide groove 11A1~
Fatigue peeling may occur on the inner surface of the one half such as 11F1. In this case, pull out the spline shaft 28, remove the retainer 14 from inside the cylinder 10, rotate the retainer 14 to the left or right by two pitches of the ball guide groove 11, and fit it again into the cylinder 10 and fix it (see Fig. 8). ), then insert the spline shaft 28.
In such a case, the ball guide grooves 11A2 to 11F2 and the like transmit torque instead of the ball guide grooves 11A1 to 11F1, so that the life of the spline bearing is doubled.
上記実施例では、ボール案内溝１１を円筒内面
に等間隔、同一深さに設けたが、上記のようにリ
テーナ１４を回動して再嵌入固定が可能なために
は、循環通路２７を構成する１対のボール案内溝
１１Ｂ１と１１Ａ２，１１Ｂ２と１１ｃ１等の間
隔を一定にし、これら１対のボール案内溝よりな
るボール案内溝対１１ａ，１１ｂ……１１ｆ（第
９図）を等間隔に設ければよい。この場合は、リ
テーナの再挿入時の回動角はボール案内溝対１１
ａ，１１ｂ……１１ｆ等のピツチとなる。 In the above embodiment, the ball guide grooves 11 are provided on the inner surface of the cylinder at equal intervals and at the same depth. However, in order to be able to rotate the retainer 14 and refit and fix it as described above, the circulation passage 27 must be configured. The distances between the pairs of ball guide grooves 11B1 and 11A2, 11B2 and 11c1, etc. are kept constant, and ball guide groove pairs 11a, 11b...11f (Fig. 9) consisting of these pairs of ball guide grooves are provided at equal intervals. That's fine. In this case, the rotation angle when re-inserting the retainer is the ball guide groove pair 11.
The pitches are a, 11b...11f, etc.
また突条２９はｎ個（ｎは２以上の整数）であ
り、その場合ボール案内溝の全数は4n個とな
る。 Further, there are n protrusions 29 (n is an integer of 2 or more), and in that case, the total number of ball guide grooves is 4n.
本発明は上記構成を有し、リテーナの角度位置
を変えてトルク伝達に関与するボール案内溝を変
更しうるので、ボールスプライン軸受の使用寿命
を従来に比して倍加し得る上に、前記ボール案内
溝は一様深さを有するから、その加工が容易で且
つアウターレースの外径が最小となる効果があ
り、特にボールの循環通路を構成する１対のボー
ル案内溝間の間隔を大にすれば、該通路の端部の
半円形通路の半径が大となつてボールの旋回移動
摩擦力を低減することができる上に、ボール案内
溝間を連絡する環状溝がボール案内溝より僅か低
くても、舌片のボール掬い上げ作用によつてボー
ルを前記半円形通路内への送出を容易ならしめて
ボールの循環移動を容易ならしめ得る等のすぐれ
た効果がある。 The present invention has the above configuration, and the ball guide groove involved in torque transmission can be changed by changing the angular position of the retainer, so the service life of the ball spline bearing can be doubled compared to the conventional ball spline bearing. Since the guide grooves have a uniform depth, they are easy to process and have the effect of minimizing the outer diameter of the outer race.In particular, it is possible to increase the distance between the pair of ball guide grooves that constitute the ball circulation path. In this case, the radius of the semicircular passage at the end of the passage becomes large, which reduces the frictional force of the rotational movement of the ball, and the annular groove communicating between the ball guide grooves is slightly lower than the ball guide groove. Even if the ball is scooped up by the tongue, the ball can be easily delivered into the semicircular passage, and the ball can be easily circulated, which is an excellent effect.
第１図は従来装置の横断面図、第２図以下は本
発明の実施例を示し、第２図は縦断面図、第３図
はアウターレースの側面図、第４図はアウターレ
ースの部分斜視図、第５図はリテーナの横断面
図、第６図はリテーナの斜視図、第７図は横断面
図、第８図はリテーナ挿入位置を変えた場合の横
断面図、第９図は他の実施例の横断面図である。
１０……アウターレース、１１……ボール案内
溝、１１ａ〜１１ｆ……ボール案内溝対、１２…
…環状溝、１３……円錐面、１４……リテーナ、
１５……外周面、１６……厚肉部、１７……薄肉
部、１９と２０……ボール案内支持溝対、２１…
…長孔、２２……案内溝、２３……ボール通路、
２４……舌片、２９……突条、３０……転走面。
Fig. 1 is a cross-sectional view of a conventional device, Fig. 2 and subsequent figures show an embodiment of the present invention, Fig. 2 is a longitudinal sectional view, Fig. 3 is a side view of the outer race, and Fig. 4 is a portion of the outer race. FIG. 5 is a perspective view, FIG. 5 is a cross-sectional view of the retainer, FIG. 6 is a perspective view of the retainer, FIG. 7 is a cross-sectional view, FIG. 8 is a cross-sectional view when the retainer insertion position is changed, and FIG. 9 is a cross-sectional view of the retainer. FIG. 7 is a cross-sectional view of another embodiment. 10...Outer race, 11...Ball guide groove, 11a to 11f...Ball guide groove pair, 12...
... annular groove, 13 ... conical surface, 14 ... retainer,
15... Outer peripheral surface, 16... Thick wall portion, 17... Thin wall portion, 19 and 20... Ball guide support groove pair, 21...
...Elongated hole, 22...Guide groove, 23...Ball passage,
24...tongue piece, 29...projection, 30...rolling surface.
Claims (1)
（ｎは２以上の整数）のほぼ半円形で同一深さの
ボール案内溝を隣接する各ボール案内溝対が円周
方向に等間隔を有するように形成すると共に各ボ
ール案内溝の両端をそれぞれ円錐面を介して円周
方向に接続する、ボール案内溝より深い環状溝を
前記円筒内面に設けたアウターレースと、 前記円筒内面に嵌入固定され、外周面に2n対
のアウターレースボール案内溝に対応する2n対
のボール案内支持溝及び該各ボール案内支持溝対
ごとにボール案内支持溝の両端を連絡して環状溝
と共にほぼ半円形のボール通路を形成する案内溝
を具えた厚肉部と、厚肉部間の薄肉部と、薄肉部
に面するボール案内支持溝に設けたボール露出用
長孔と、長孔両端に突出し円錐面と共にボールを
ボール通路に導く舌片とを有するリテーナと、 薄肉部両側の長孔から露出するボールの転走面
を両側に形成した突条を有するスプライン軸と、
を有するボールスプライン軸受。[Scope of Claims] 1. 2n pairs (n is an integer of 2 or more) of approximately semicircular ball guide grooves of the same depth extending in the axial direction of the cylinder on the inner surface of the cylinder, each pair of adjacent ball guide grooves being circular. an outer race in which an annular groove deeper than the ball guide groove is provided on the inner surface of the cylinder, the groove being formed at equal intervals in the circumferential direction and connecting both ends of each ball guide groove in the circumferential direction via a conical surface; The inner surface of the cylinder is fitted and fixed, and the outer peripheral surface has 2n pairs of ball guide and support grooves corresponding to the 2n pairs of outer race ball guide grooves, and both ends of the ball guide and support grooves are connected for each pair of ball guide and support grooves to form an annular shape. A thick wall portion provided with a guide groove that forms an approximately semicircular ball passage together with the groove, a thin wall portion between the thick wall portions, a long hole for ball exposure provided in the ball guide support groove facing the thin wall portion, and a long hole for exposing the ball provided in the ball guide support groove facing the thin wall portion. a retainer having conical surfaces protruding from both ends of the hole and tongues guiding the balls into the ball passage; a spline shaft having protrusions on both sides forming ball rolling surfaces exposed from the elongated holes on both sides of the thin wall portion;
Ball spline bearing with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16203781A JPS5865320A (en) | 1981-10-13 | 1981-10-13 | Ball spline bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16203781A JPS5865320A (en) | 1981-10-13 | 1981-10-13 | Ball spline bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5865320A JPS5865320A (en) | 1983-04-19 |
| JPS628649B2 true JPS628649B2 (en) | 1987-02-24 |
Family
ID=15746874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16203781A Granted JPS5865320A (en) | 1981-10-13 | 1981-10-13 | Ball spline bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5865320A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0653325B2 (en) * | 1986-03-31 | 1994-07-20 | 株式会社ミヤノ | Tailstock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3673817A (en) * | 1970-09-23 | 1972-07-04 | Beaver Precision Prod | Ball spline assembly |
| JPS5321058A (en) * | 1976-08-11 | 1978-02-27 | Nippon Steel Corp | Method of detecting effective current in high frequency welding |
| JPS5322209A (en) * | 1976-08-10 | 1978-03-01 | Nippon Signal Co Ltd:The | Simplex ground devi ce for automatic train control |
| JPS5322208A (en) * | 1976-08-11 | 1978-03-01 | Toshiba Corp | Track for vehicle |
| JPS5597518A (en) * | 1979-01-20 | 1980-07-24 | Hiroshi Teramachi | Endless sliding ball spline bearing |
-
1981
- 1981-10-13 JP JP16203781A patent/JPS5865320A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3673817A (en) * | 1970-09-23 | 1972-07-04 | Beaver Precision Prod | Ball spline assembly |
| JPS5322209A (en) * | 1976-08-10 | 1978-03-01 | Nippon Signal Co Ltd:The | Simplex ground devi ce for automatic train control |
| JPS5321058A (en) * | 1976-08-11 | 1978-02-27 | Nippon Steel Corp | Method of detecting effective current in high frequency welding |
| JPS5322208A (en) * | 1976-08-11 | 1978-03-01 | Toshiba Corp | Track for vehicle |
| JPS5597518A (en) * | 1979-01-20 | 1980-07-24 | Hiroshi Teramachi | Endless sliding ball spline bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5865320A (en) | 1983-04-19 |
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