JPH0594521U - Retaining ring - Google Patents
Retaining ringInfo
- Publication number
- JPH0594521U JPH0594521U JP4861892U JP4861892U JPH0594521U JP H0594521 U JPH0594521 U JP H0594521U JP 4861892 U JP4861892 U JP 4861892U JP 4861892 U JP4861892 U JP 4861892U JP H0594521 U JPH0594521 U JP H0594521U
- Authority
- JP
- Japan
- Prior art keywords
- retaining ring
- cutouts
- opening
- peripheral edge
- shaped retaining
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 40
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000012447 hatching Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
(57)【要約】
【目的】 拡径又は縮径変形に伴って開離部の対称位置
の内周に生じる応力集中を効果的に緩和でき、広幅であ
っても十分な拡径又は縮径が可能であり、治具を用いた
能率的な装着を、確実になし得るようにする。
【構成】 円環の一部を適宜幅の開離部1aにより欠損さ
せてなり、平面視にてＣ型をなす環状部1bの外周縁に、
円弧状に切欠いてなる複数の外切欠き部10，10…を、開
離部1aを挾んだ両側に軸対称をなして形成する。また、
開離部1aと対称をなす位置の外周縁に、所定の中心角範
囲に亘って一定深さの外切欠き部11を形成する。更に、
互いに相隣する外切欠き部10，10間、及び外切欠き部11
とこれに相隣する外切欠き部10との間の夫々に、環状部
1bの内周縁を円弧状に切欠いてなる内切欠き部12，12…
を形成する。
(57) [Summary] [Purpose] Effectively relieving the stress concentration that occurs on the inner circumference of the symmetrical position of the separation part due to the diameter expansion or diameter reduction deformation, and sufficient diameter expansion or diameter reduction even with a wide width. It is possible to ensure efficient mounting using a jig. [Structure] A part of a circular ring is cut off by an opening 1a having an appropriate width, and an outer peripheral edge of a C-shaped annular portion 1b in plan view
A plurality of outer cutouts 10, 10 ... Which are cut out in an arc shape are formed in axial symmetry on both sides of the opening 1a. Also,
An outer notch 11 having a constant depth is formed in a predetermined central angle range on the outer peripheral edge at a position symmetrical with the opening 1a. Furthermore,
Between the outer notch parts 10 and 10 adjacent to each other, and the outer notch part 11
And the outer notch 10 adjacent to the
Inner cutouts 12, 12 formed by cutting the inner peripheral edge of 1b in an arc shape.
To form.
Description
【０００１】[0001]
本考案は、軸方向の位置決め用の機械要素として広く用いられている止め輪に 関する。 The present invention relates to a snap ring widely used as a mechanical element for axial positioning.
【０００２】[0002]
軸に外嵌された筒体、又は孔に内嵌された軸体を軸長方向に位置決めすべく用 いられる止め輪は、前記軸又は前記孔への後付けが可能であり、設計の自由度が 高いことから、各種の機械装置に広く用いられている。 The snap ring used to position the cylindrical body externally fitted to the shaft or the axial body fitted internally to the hole in the axial direction can be retrofitted to the shaft or the hole, and the degree of freedom in design can be increased. It is widely used in various mechanical devices due to its high cost.
【０００３】 図３は一般的な軸用Ｃ型止め輪の平面図である。図示の如くＣ型止め輪３は、 周方向に均一な矩形断面を有する円環を周方向に適宜の幅を有する開離部3aによ り欠損させ、平面視にてＣ型をなす環状部3bを備えてなる。前記開離部3aを挾ん で対向する前記環状部3bの両端縁には、半径方向外向きに張り出し部が設けてあ り、この張出し部には、開離部3aの後述する拡幅操作に用いる操作孔3c，3cが形 成してある。FIG. 3 is a plan view of a general C-shaped retaining ring for a shaft. As shown in the figure, the C-shaped retaining ring 3 has an annular portion having a uniform rectangular cross section in the circumferential direction, which is cut off by a separating portion 3a having an appropriate width in the circumferential direction to form a C-shaped annular portion in plan view. It is equipped with 3b. At both ends of the annular portion 3b that opposes the opening 3a, protrusions are provided outward in the radial direction, and the protrusions are used for widening operation of the opening 3a described later. The operation holes 3c, 3c to be used are formed.
【０００４】 図４は、軸４に外嵌された筒体５を軸長方向に位置決めする際のＣ型止め輪３ の装着方法の説明図である。図示の如く軸４の外周には、Ｃ型止め輪３の厚さと 略等しい幅を有する係合溝40が周設してある。Ｃ型止め輪３の装着は、開離部3a を拡幅せしめて環状部3bを拡径変形させ、この状態で前記軸４の一側端部から嵌 挿した後、前記係合溝40に整合する位置にて前記変形を解除する手順により行わ れる。これによりＣ型止め輪３は、図示の如く、環状部3bの内周縁を係合溝40内 に係合させ、外周側を適幅突出させた状態で軸４に係着されたことになり、該軸 ４に外嵌された筒体５は、係合溝40から突出する環状部3bにその一側端面を突き 当てた態様にて位置決めされる。FIG. 4 is an explanatory diagram of a method of mounting the C-shaped retaining ring 3 when positioning the tubular body 5 fitted onto the shaft 4 in the axial direction. As shown in the drawing, an engaging groove 40 having a width substantially equal to the thickness of the C-shaped retaining ring 3 is provided around the outer periphery of the shaft 4. When mounting the C-shaped retaining ring 3, the opening 3a is widened and the annular portion 3b is expanded and deformed, and in this state, it is fitted from one end of the shaft 4 and then aligned with the engagement groove 40. It is carried out by the procedure of releasing the deformation at the position to be turned. As a result, the C-shaped retaining ring 3 is engaged with the shaft 4 in a state where the inner peripheral edge of the annular portion 3b is engaged with the engaging groove 40 and the outer peripheral side is projected with an appropriate width as shown in the figure. The cylindrical body 5 fitted onto the shaft 4 is positioned in such a manner that one end face of the cylindrical body 3b protruding from the engaging groove 40 is abutted.
【０００５】 さて、以上の如きＣ型止め輪３の装着に際しては、開離部3aを拡幅させ、この 状態を軸４への嵌挿の間に維持する必要があり、これらは一般的に、前記操作孔 3c，3cに作用端を差し込んだプライヤーの操作により行われるが、同一寸法を有 する多数の軸４，４…に対して各別のＣ型止め輪３，３…を装着することが要求 される製造ラインにおいては、装着作業の能率向上のため、図５に示す如き専用 の治具６が用いられることがある。When mounting the C-shaped retaining ring 3 as described above, it is necessary to widen the opening portion 3a and maintain this state during the insertion of the shaft 4. The operation is performed by operating the pliers with the working ends inserted in the operation holes 3c, 3c, but different C-shaped retaining rings 3, 3 ... Are attached to a large number of shafts 4, 4 ,. In a manufacturing line that requires the above, a dedicated jig 6 as shown in FIG. 5 may be used in order to improve the efficiency of mounting work.
【０００６】 治具６は、軸４への遊嵌が可能な円筒形をなす保持部6aの一側に、先端に向け て外径が縮径されたテーパ部6bを連設した構成となっており、この治具６を用い たＣ型止め輪の装着作業は、図５に示す如く、保持部6aに多数のＣ型止め輪３， ３…を保持させた状態でテーパ部6b側から軸４に遊嵌し、１つのＣ型止め輪３を テーパ部6b側に押出し、該テーパ部6bの傾斜に沿わせて滑動させて、先端縁に整 合する係合溝40内に落とし込む手順にて行われる。The jig 6 has a structure in which a taper portion 6b having an outer diameter reduced toward the tip is continuously provided on one side of a cylindrical holding portion 6a that can be loosely fitted on the shaft 4. As shown in FIG. 5, the mounting work of the C-shaped retaining ring using the jig 6 is performed from the taper portion 6b side with a large number of C-shaped retaining rings 3, 3 ... Procedure for loosely fitting the shaft 4 and pushing out one C-shaped retaining ring 3 to the taper portion 6b side, sliding it along the inclination of the taper portion 6b, and dropping it into the engagement groove 40 aligned with the tip edge. Will be held in.
【０００７】[0007]
ところが、前記治具６を用いたＣ型止め輪３の装着に際しては、正規の装着対 象となる軸４よりも大径の前記保持部6aにＣ型止め輪３を嵌挿しておく必要があ り、この嵌挿に際し環状部3bに多大の拡径変形を強いる結果、半径方向に開離部 3aと対称をなす環状部3bの内周側（図３中のＡ部）に応力集中が生じ、環状部3b が塑性変形して係合溝40への係合が確実に行われず、筒体５の確実な位置決めに 支障を来す場合があった。 However, when mounting the C-shaped retaining ring 3 using the jig 6, it is necessary to insert the C-shaped retaining ring 3 into the holding portion 6a having a diameter larger than that of the shaft 4 which is the regular mounting target. As a result of the large diameter expansion deformation of the annular portion 3b at the time of this insertion, stress concentration occurs on the inner peripheral side (A portion in FIG. 3) of the annular portion 3b which is symmetrical to the opening 3a in the radial direction. In some cases, the annular portion 3b is plastically deformed and is not reliably engaged with the engaging groove 40, which may hinder reliable positioning of the tubular body 5.
【０００８】 また、軸４との間に隙間を有して嵌合された筒体５を位置決めする場合等、内 外径差の大きい広幅のＣ型止め輪３を用いる必要があるが、この種のＣ型止め輪 ３においては、環状部3bの拡径に多大の力を要し、この拡径の程度が大きい前記 治具６の使用は難しく、装着作業の能率低下を招来する難点があった。In addition, when positioning the tubular body 5 fitted with a gap between it and the shaft 4, it is necessary to use a wide C-shaped retaining ring 3 having a large difference in inner and outer diameters. In the C-shaped retaining ring 3 of a kind, a large amount of force is required to expand the diameter of the annular portion 3b, and it is difficult to use the jig 6 having a large degree of the diameter expansion, and there is a drawback that the efficiency of mounting work is reduced. there were.
【０００９】 そこで特公昭55-25288号公報には、広幅であっても十分な拡径が可能であり、 また拡径時における応力集中の程度を緩和して、一般的なＣ型止め輪３における 前述した難点の解消を図ったＣ型止め輪が開示されている。図６は、このＣ型止 め輪の平面図である。In view of this, Japanese Patent Publication No. 55-25288 discloses a general C-type snap ring 3 which allows a sufficient diameter expansion even if the width is wide, and relaxes the degree of stress concentration during the diameter expansion. A C-shaped retaining ring that solves the above-mentioned difficulties is disclosed. FIG. 6 is a plan view of this C-type retaining ring.
【００１０】 図示の如くこのＣ型止め輪２は、図３に示す一般的なＣ型止め輪３と同様、周 方向に均一な矩形断面を有する円環を周方向に適宜の幅を有する開離部2aにより 欠損させ、平面視にてＣ型をなす環状部2bを備え、また開離部2aを挾んで対向す る環状部2bの両端縁近傍に夫々操作孔2c，2cを備えると共に、環状部2bの外周縁 に、内周側を所定幅残して円弧状に切欠く複数の切欠き部20，20…を、前記開離 部2aを挾んだ両側に軸対称をなして形成し、更に、前記開離部2aと対称をなす位 置の外周縁に略一定の深さを有する切欠き部21を形成してなる。As shown in the figure, this C-shaped retaining ring 2 is, like the general C-shaped retaining ring 3 shown in FIG. 3, an annular ring having a uniform rectangular cross section in the circumferential direction and having an appropriate width in the circumferential direction. The annular portion 2b, which is cut off by the separating portion 2a and has a C-shape in plan view, is provided, and the operating holes 2c and 2c are provided in the vicinity of both end edges of the annular portion 2b facing each other across the separating portion 2a. A plurality of notches 20, 20 ... Notched in an arc shape are formed on the outer peripheral edge of the annular portion 2b while leaving a predetermined width on the inner peripheral side, and are formed in axial symmetry on both sides of the opening 2a. Further, a notch 21 having a substantially constant depth is formed on the outer peripheral edge of a position symmetrical with the opening 2a.
【００１１】 つまりこのＣ型止め輪２は、前記切欠き部20，20…及び前記切欠き部21の形成 により、環状部2bの周方向複数箇所に弱い部分を設け、これらの部分に環状部2b の拡径により発生する応力を分散させて、開離部2aと対称をなす位置の内周側、 即ち、図３中に示すＡ部への応力集中を緩和しようとするものである。That is, the C-shaped retaining ring 2 is provided with weak portions at a plurality of circumferential positions of the annular portion 2b due to the formation of the notched portions 20, 20, ... And the notched portion 21, and the annular portions are provided at these portions. The stress generated by the expansion of the diameter of 2b is dispersed so as to reduce the stress concentration on the inner peripheral side of the position symmetrical with the opening 2a, that is, the portion A shown in FIG.
【００１２】 このように特公昭55-25288号公報に開示されたＣ型止め輪２は、装着時の拡径 に伴う塑性変形の程度が小さく、前述した治具６を用いた能率的な装着が可能と なる優れたものであるが、最大主応力分布の線形ＦＥＭ（有限要素法）解析の結 果を示す図７に明らかな如く、応力集中の緩和は不十分である。As described above, the C-shaped retaining ring 2 disclosed in Japanese Examined Patent Publication No. 55-25288 has a small degree of plastic deformation due to the expansion of the diameter at the time of mounting, and thus the efficient mounting using the jig 6 described above. However, the relaxation of stress concentration is insufficient, as is clear from FIG. 7 showing the result of the linear FEM (finite element method) analysis of the maximum principal stress distribution.
【００１３】 なお、解析に用いたＣ型止め輪２は、環状部2bの内径（Ｄ1 ）が17.6mm、外径 （Ｄ2 ）が24.6mmであり、共に半径（Ｒ1 ）が３mmの円弧により外周縁を切欠い て形成された６つの切欠き部20，20…を備え、これらの内、開離部2aの中心から 両側に各50°の位置にある２つは内周側に 1.6mmなる幅を残すように、またこれ らから各35°の位置にある２つは内周側に 1.8mmなる幅を残すように、更にこれ らから各35°の位置にある２つは内周側に 2.4mmなる幅を残すように順次深さを 減じてある。また、前記開離部2aの幅（＝Ｗ）は３mmであり、この開離部2aと対 称をなす位置の外周縁には、両側夫々30°の中心角範囲に亘り、１mmの深さを有 して切欠き部21が形成してある。なお、以上の説明におけるＤ1 ，Ｄ2 ，Ｒ1 及 びＷは、図６に示してある。The C-shaped retaining ring 2 used in the analysis has an inner diameter (D 1 ) of the annular portion 2b of 17.6 mm, an outer diameter (D 2 ) of 24.6 mm, and a radius (R 1 ) of 3 mm. It is equipped with six notch parts 20, 20 ... Formed by notching the outer peripheral edge by an arc. Of these, two at the position of 50 ° on both sides from the center of the opening 2a are on the inner peripheral side. To leave a width of 1.6mm, and to leave the width of 1.8mm on the inner circumference side, the two that are at 35 ° from each other, and to leave the width of 35 ° from each of these, The depth is gradually reduced to leave a width of 2.4 mm on the inner peripheral side. The width (= W) of the opening 2a is 3 mm, and the outer edge of the position opposite to the opening 2a has a depth of 1 mm over the center angle range of 30 ° on both sides. The notch 21 is formed. Incidentally, D 1 , D 2 , R 1 and W in the above explanation are shown in FIG.
【００１４】 図７は、前述した寸法を有するＣ型止め輪２を前記内径Ｄ1 が20.5mmとなるま で拡径させた状態での最大主応力分布を示しており、図中のハッチングの密度が 応力の大小（所定の基準応力に対する相対値）に対応させてある。本図に明らか な如く、６つの切欠き部20，20…夫々の内周側には応力が高い部分が生じており 、周方向の応力分散が図られることがわかるが、開離部3aとの対称位置の内周側 には、前記各部分よりも高い応力状態にある応力集中部（図中の黒塗り部分）が 生じており、応力集中の緩和が十分に果たされているとは言えない。FIG. 7 shows the maximum principal stress distribution in a state in which the C-shaped retaining ring 2 having the above-described dimensions is expanded until the inner diameter D 1 becomes 20.5 mm. Density corresponds to the magnitude of stress (relative value to a predetermined standard stress). As is apparent from this figure, there are high stress portions on the inner peripheral side of each of the six cutouts 20, 20, ... It can be seen that the stress is distributed in the circumferential direction. On the inner peripheral side of the symmetrical position of, there is a stress concentration part (black part in the figure) that is in a higher stress state than the above parts, and it is said that the stress concentration is sufficiently relaxed. I can not say.
【００１５】 なお以上の如き問題は、縮径変形せしめた状態で円孔に内挿され、該円孔に内 嵌された軸体の位置決めのために内周面に周設された係合溝に係着して用いられ る穴用Ｃ型止め輪においても全く同様に生じるものである。The above-mentioned problems are caused by the engagement groove which is inserted into the circular hole in the state of being reduced in diameter and deformed, and which is provided around the inner peripheral surface for positioning the shaft body fitted in the circular hole. The same applies to the C-type retaining ring for holes that is used by attaching to.
【００１６】 本考案は斯かる事情に鑑みてなされたものであり、装着時における拡径又は縮 径変形に伴って開離部の対称位置に生じる応力集中を効果的に緩和でき、広幅で あっても十分な拡径又は縮径が可能であり、治具を用いた能率的な装着をなし得 るＣ型止め輪を提供することを目的とする。The present invention has been made in view of such circumstances, and it is possible to effectively alleviate the stress concentration generated at the symmetrical position of the separation portion due to the diameter expansion or the diameter reduction deformation at the time of mounting, and it is wide. However, it is an object of the present invention to provide a C-shaped retaining ring that can be sufficiently expanded or reduced in diameter and can be mounted efficiently using a jig.
【００１７】[0017]
本考案に係る止め輪は、周方向に適宜幅に亘る開離部により円環の一部を欠損 させた環状部を備え、該環状部を前記開離部の拡幅又は縮幅を伴って変形させ、 円形断面を有する軸の外側又は孔の内側に挿入して、夫々の周面に係着せしめて 用いる止め輪において、前記開離部の両側に軸対称をなして並設され、前記環状 部の外周縁を切欠く複数の外切欠き部と、周方向に相隣する外切欠き部間に夫々 位置し、前記環状部の内周縁を切欠く複数の内切欠き部とを具備することを特徴 とする。 A retaining ring according to the present invention comprises an annular portion in which a part of an annulus is cut off by an opening portion having an appropriate width in the circumferential direction, and the annular portion is deformed with the expansion or contraction of the opening portion. Then, in a retaining ring that is used by being inserted into the outside of a shaft having a circular cross section or inside the hole and being fixed to each peripheral surface, the retaining rings are arranged side by side with axial symmetry on both sides of the opening, A plurality of outer cutouts that cut out the outer peripheral edge of the ring portion, and a plurality of inner cutouts that are located between the outer cutouts that are adjacent to each other in the circumferential direction and that cut out the inner peripheral edge of the annular portion. It is characterized by
【００１８】[0018]
【作用】 本考案においては、外周縁を切欠いて形成された複数の外切欠き部に加え、こ れらの外切欠き部の中間位置、即ち、外切欠き部により幅が減じられていない部 分に内周縁を切欠く内切欠き部を形成して、外切欠き部の形成位置の内周側及び 内切欠き部の形成位置への応力分散を図り、開離部の対称位置に生じる応力集中 をより効果的に緩和する。In the present invention, in addition to the plurality of outer cutouts formed by cutting out the outer peripheral edge, the width is not reduced by the middle position of these outer cutouts, that is, the outer cutouts. By forming an inner cutout that cuts the inner peripheral edge in each part, the stress is distributed to the inner peripheral side of the formation position of the outer cutout part and the formation position of the inner cutout part, and at the symmetrical position of the opening part. Relieves the stress concentration that occurs more effectively.
【００１９】[0019]
以下本考案をその実施例を示す図面に基づいて詳述する。図１は本考案に係る Ｃ型止め輪の平面図である。図示の如くこのＣ型止め輪１は、図３に示すＣ型止 め輪３、及び図６に示すＣ型止め輪２と同様、周方向に均一な矩形断面を有する 円環を周方向に適宜の幅を有する開離部1aにより欠損させ、平面視にてＣ型をな す環状部1bを備え、また開離部1aを挾んで対向する環状部1bの両端縁近傍に夫々 操作孔1c，1cを備えている。 Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment thereof. FIG. 1 is a plan view of a C-shaped retaining ring according to the present invention. As shown in the figure, this C-shaped snap ring 1 is, like the C-shaped snap ring 3 shown in FIG. 3 and the C-shaped snap ring 2 shown in FIG. 6, a circular ring having a uniform rectangular cross section in the circumferential direction. It is provided with an annular portion 1b which is C-shaped in plan view and which is cut off by an opening portion 1a having an appropriate width, and operation holes 1c are provided in the vicinity of both end edges of the annular portion 1b facing each other across the opening portion 1a. , 1c.
【００２０】 前記環状部1bの外周縁には、前記開離部1aを挾んだ両側に軸対称をなし、内周 側に所定幅を残して円弧状に切欠いてなる複数（本実施例においては６つ）の外 切欠き部10，10…が形成され、また、前記開離部1aと対称をなす位置の両側に所 定の中心角範囲に亘って、一定の深さを有する外切欠き部11が形成されていると 共に、本考案に係るＣ型止め輪１は、環状部1bの内周縁にもまた複数の内切欠き 部12，12…を備えている。A plurality of arc-shaped cutouts (in the present embodiment) are formed on the outer peripheral edge of the annular portion 1b so as to have axial symmetry on both sides of the opening 1a and leave a predetermined width on the inner peripheral side. 6) outer cutouts 10, 10 ... Are formed, and the outer cutouts have a constant depth on both sides of a position symmetrical to the opening 1a over a predetermined central angle range. Along with the notch 11, the C-shaped retaining ring 1 according to the present invention also has a plurality of inner notches 12, 12 at the inner peripheral edge of the annular portion 1b.
【００２１】 図示の如く内切欠き部12，12…は、外周縁に形成された外切欠き部10，10…及 び外切欠き部11の内、互いに相隣するものの略中央に位置し、内周側に所定幅を 残して円弧状に切欠いて、環状部1bの周方向に複数（本実施例においては６つ） 形成されている。As shown in the figure, the inner cutouts 12, 12 ... Are located in the approximate center of the outer cutouts 10, 10 ... A plurality of (six in this embodiment) are formed in the circumferential direction of the annular portion 1b by cutting out in an arc shape while leaving a predetermined width on the inner circumferential side.
【００２２】 つまり本考案に係るＣ型止め輪１は、図６に示すＣ型止め輪２の内周縁側に複 数の内切欠き部12，12…を追加したものに相当し、装着時の拡径に伴って環状部 1bに生じる応力を、前記内切欠き部12，12…の形成部位と、外周縁側における外 切欠き部10，10…の形成部位の内周側とに分散させて、開離部1aと対称をなす部 分（図３中のＡ部）における応力集中を緩和しようとするものである。従って、 外切欠き部10，10…と同じ周方向位置に内切欠き部12，12…を形成することは無 意味であり、内切欠き部12，12…は、互いに相隣する外切欠き部10，10間、又は 外切欠き部11とこれに相隣する外切欠き部10との間に形成され、更に、夫々の間 の中央に形成されてもよい。In other words, the C-shaped retaining ring 1 according to the present invention corresponds to the C-shaped retaining ring 2 shown in FIG. 6 in which a plurality of inner cutouts 12, 12, ... The stress generated in the annular portion 1b due to the expansion of the diameter is dispersed in the formation portion of the inner cutout portions 12, 12 ... And the inner peripheral side of the formation portion of the outer cutout portions 10, 10 ... Then, the stress concentration in the portion symmetrical with the open portion 1a (A portion in FIG. 3) is to be alleviated. Therefore, it is meaningless to form the inner cutouts 12, 12 ... At the same circumferential position as the outer cutouts 10, 10 ... The inner cutouts 12, 12 ... It may be formed between the notches 10 or 10, or between the outer notch 11 and the outer notch 10 adjacent to the outer notch 11, and further may be formed at the center between the respective notches.
【００２３】 以上の如く構成された本考案に係るＣ型止め輪１における応力分布のＦＥＭ解 析の結果を図２に示す。本図は、図７に示す従来のＣ型止め輪２と同寸、即ち、 環状部1bの内径（Ｄ1 ）が17.6mm、外径（Ｄ2 ）が24.6mmであり、また開離部1a の幅（＝Ｗ）を３mmとしたＣ型止め輪１に対し、同一の解析条件下、即ち、内径 Ｄ1 が20.5mmとなるまで拡径させた条件下での最大主応力分布を解析した結果を 示しており、図中のハッチングの密度が応力の大小（所定の基準応力に対する相 対値）に対応させてある。FIG. 2 shows the result of FEM analysis of the stress distribution in the C-shaped retaining ring 1 according to the present invention configured as described above. This figure shows the same size as the conventional C type retaining ring 2 shown in FIG. 7, that is, the inner diameter (D 1 ) of the annular portion 1b is 17.6 mm, the outer diameter (D 2 ) is 24.6 mm, and Analyze the maximum principal stress distribution under the same analysis conditions, ie, under the condition that the inner diameter D 1 was expanded to 20.5 mm for the C-shaped retaining ring 1 with the width (= W) of 1a of 3 mm. The results are shown, and the hatching density in the figure corresponds to the magnitude of the stress (corresponding value for a given standard stress).
【００２４】 Ｃ型止め輪１の外周縁側の６つの外切欠き部10，10…は、Ｃ型止め輪２におけ る切欠き部20，20…と同じく、共に半径（Ｒ1 ）が３mmの円弧により切欠いて形 成されており、これらの内、開離部1aの中心から両側に各50°の位置にある２つ は内周側に 1.6mmなる幅を残すように、またこれらから各35°の位置にある２つ は内周側に 1.7mmなる幅を残すように、更にこれらから各35°の位置にある２つ は内周側に 2.1mmなる幅を残すように順次深さを減じてある。また、前記開離部 1aと対称をなす位置の外周縁には、両側夫々30°の中心角範囲に亘り、１mmの深 さを有して外切欠き部11が形成してある。The six outer cutouts 10, 10, ... On the outer peripheral side of the C-shaped retaining ring 1 have a radius (R 1 ) of 3 mm, like the cutouts 20, 20, ... In the C-shaped retaining ring 2. It is formed by notching by the arc of, and two of these are located at 50 ° on each side from the center of the opening 1a so that a width of 1.6 mm is left on the inner side and The two at the 35 ° position each have a width of 1.7 mm on the inner circumference side, and the two at each 35 ° position have a depth of 2.1 mm on the inner circumference side. Is reduced. Further, an outer cutout 11 having a depth of 1 mm is formed on the outer peripheral edge at a position symmetrical to the opening 1a over the center angle range of 30 ° on both sides.
【００２５】 一方、Ｃ型止め輪１の内切欠き部12，12…は、互いに相隣する外切欠き部10， 10間の中央、又は外切欠き部10と外切欠き部11との間の中央において、共に半径 （Ｒ2 ）が２mmの円弧により内周縁を切欠いてなり、これらの内、開離部1aに近 い位置にある２つは外周側に 2.7mmなる幅を残し、他の４つは外周側に 2.9mmな る幅を残して夫々形成されている。なお、以上の説明におけるＤ1 ，Ｄ2 ，Ｒ1 ，Ｒ2 及びＷは、図１に示してある。On the other hand, the inner cutouts 12, 12, ... Of the C-shaped retaining ring 1 are located at the center between the outer cutouts 10, 10 adjacent to each other or between the outer cutout 10 and the outer cutout 11. In the center of the space, the inner peripheral edge is cut out by an arc having a radius (R 2 ) of 2 mm, and two of these are located close to the opening 1a, leaving a width of 2.7 mm on the outer peripheral side. The other four are formed with a width of 2.9 mm on the outer peripheral side. Note that D 1 , D 2 , R 1 , R 2 and W in the above description are shown in FIG.
【００２６】 図２に明らかな如く、本考案に係るＣ型止め輪１においては、６つの外切欠き 部10，10…夫々の内周側と、６つの内切欠き部12，12…の中央部とに応力が高い 部分が生じており、周方向の応力分散が実現されていると共に、外切欠き部11の 両側に位置する内切欠き部12，12の中央、更に、これらの他側に位置する外切欠 き部10，10の内周側には、外切欠き部11の内周側、即ち、開離部3aと対称をなす 位置の内周側と同等の応力状態にある応力集中部（図中の黒塗り部分）が生じて おり、図７に示すＣ型止め輪２の結果と比較した場合、より有効に応力集中の緩 和がなされていることがわかる。As is apparent from FIG. 2, in the C-shaped retaining ring 1 according to the present invention, the six outer cutouts 10, 10 ... Each of the inner peripheral sides and the six inner cutouts 12, 12 ,. There is a high stress in the center and the stress is distributed in the circumferential direction, and at the center of the inner notches 12 and 12 located on both sides of the outer notch 11, as well as these other parts. The inner peripheral side of the outer cutouts 10, 10 located on the side is in the same stress state as the inner peripheral side of the outer cutout 11, that is, the inner peripheral side of the position symmetrical with the opening 3a. A stress concentration portion (black-painted portion in the figure) has occurred, and it can be seen that the stress concentration is relaxed more effectively when compared with the result of the C-shaped retaining ring 2 shown in FIG. 7.
【００２７】 また、応力の大小を示すハッチングの密度の面から本考案に係るＣ型止め輪１ と従来のＣ型止め輪２とを比較した場合、図２に示すＣ型止め輪１においては、 図７に示すＣ型止め輪２におけるよりも全般的に高密度となっているが、前述の 如く、ハッチングの密度は所定の基準応力に対する相対値を示すものであり、高 密度の部分が多いＣ型止め輪１においては、応力分散が良好に行われていること を示している。この分散の結果、本考案に係るＣ型止め輪１の前述した条件下に おける最大主応力の最大値は、従来のＣ型止め輪２のそれに対して約29％の減少 が達成されている。Further, when comparing the C-shaped retaining ring 1 according to the present invention with the conventional C-shaped retaining ring 2 in terms of the density of hatching showing the magnitude of stress, in the C-shaped retaining ring 1 shown in FIG. Although the density is generally higher than that of the C-shaped retaining ring 2 shown in FIG. 7, as described above, the hatching density indicates a relative value with respect to a predetermined reference stress, and the high-density portion In many C-shaped retaining rings 1, it is shown that the stress distribution is well performed. As a result of this dispersion, the maximum value of the maximum principal stress of the C-shaped snap ring 1 according to the present invention under the above-mentioned conditions is reduced by about 29% with respect to that of the conventional C-shaped snap ring 2. .
【００２８】 また、前述した拡径の解除後における内径寸法Ｄ1 を調べた結果、従来のＣ型 止め輪２においては、Ｄ1 ＝18.60 mmであったのに対し、本考案に係るＣ型止め 輪１においては、Ｄ1 ＝18.27 mmであり、変形量が約33％減少することが確かめ られた。このことは、本考案に係るＣ型止め輪１においては、拡径解除後の塑性 変形量が小さく保たれ、前述した如き治具６の使用による能率的な装着を確実に 行い得ることを示している。Further, as a result of examining the inner diameter dimension D 1 after releasing the above-mentioned expansion, the conventional C-shaped retaining ring 2 has D 1 = 18.60 mm, whereas the C-shaped according to the present invention. In the snap ring 1, D 1 = 18.27 mm, and it was confirmed that the deformation amount was reduced by about 33%. This shows that in the C-shaped retaining ring 1 according to the present invention, the amount of plastic deformation after the expansion is released can be kept small, and the jig 6 as described above can be reliably mounted efficiently. ing.
【００２９】 なお、外切欠き部10，10…及び内切欠き部12，12…の形状は、本実施例中に示 す円弧形に限らず、また夫々の数及び周上の形成位置も本実施例に示すものに限 らない。また本実施例においては、軸用Ｃ型止め輪について説明したが、本考案 は、穴用Ｃ型止め輪においても同様に適用可能であることは言うまでもない。更 に、平面視においてＣ型をなすＣ型止め輪に限らず、他の平面形状を有する止め 輪にも適用できる。The shapes of the outer cutouts 10, 10, ... And the inner cutouts 12, 12, ... Are not limited to the circular arc shapes shown in the present embodiment, and the respective numbers and the formation positions on the circumference are not limited. Is not limited to that shown in this embodiment. Further, although the C-shaped retaining ring for the shaft has been described in the present embodiment, it goes without saying that the present invention can be similarly applied to the C-shaped retaining ring for the hole. Furthermore, the present invention is not limited to the C-shaped retaining ring that is C-shaped in a plan view, but can be applied to retaining rings having other planar shapes.
【００３０】[0030]
以上詳述した如く本考案に係る止め輪においては、外周縁を切欠いて形成され た複数の外切欠き部と、これらの間にて内周縁を切欠いて形成された内切欠き部 とを備え、両切欠き部の形成位置への応力分散が良好になされ、装着時における 拡径又は縮径変形に伴って開離部の対称位置に生じる応力集中が有効に緩和され るから、広幅であっても十分な拡径又は縮径が可能であり、治具を用いた能率的 な装着を確実になし得る等、本考案は優れた効果を奏する。 As described above in detail, the retaining ring according to the present invention includes a plurality of outer cutouts formed by cutting out the outer peripheral edge and an inner cutout formed by cutting out the inner peripheral edge between them. The stress is well dispersed to the positions where both notches are formed, and the stress concentration that occurs at the symmetrical position of the opening due to the expansion or contraction deformation during mounting is effectively mitigated, so it is wide. However, the present invention has an excellent effect such that the diameter can be sufficiently expanded or reduced, and efficient mounting using a jig can be surely achieved.
【図１】本考案に係るＣ型止め輪の平面図である。FIG. 1 is a plan view of a C-type retaining ring according to the present invention.
【図２】本考案に係るＣ型止め輪における最大主応力分
布の解析結果を示す図である。FIG. 2 is a diagram showing an analysis result of a maximum principal stress distribution in a C-shaped retaining ring according to the present invention.
【図３】一般的なＣ型止め輪の平面図である。FIG. 3 is a plan view of a general C type snap ring.
【図４】Ｃ型止め輪の装着方法の説明図である。FIG. 4 is an explanatory diagram of a method of mounting a C-type retaining ring.
【図５】治具を用いたＣ型止め輪の装着方法の説明図で
ある。FIG. 5 is an explanatory diagram of a method for mounting a C-shaped retaining ring using a jig.
【図６】装着時の変形に伴って生じる応力集中の緩和を
図った従来のＣ型止め輪の平面図である。FIG. 6 is a plan view of a conventional C-shaped retaining ring that alleviates stress concentration caused by deformation during mounting.
【図７】従来のＣ型止め輪における最大主応力分布の解
析結果を示す図である。FIG. 7 is a diagram showing an analysis result of a maximum principal stress distribution in a conventional C type snap ring.
１ Ｃ型止め輪 1a 開離部 1b 環状部 10 外切欠き部 11 外切欠き部 12 内切欠き部 1 C type snap ring 1a Opening part 1b Annular part 10 Outer notch part 11 Outer notch part 12 Inner notch part
Claims (1)
の一部を欠損させた環状部を備え、該環状部を前記開離
部の拡幅又は縮幅を伴って変形させ、円形断面を有する
軸の外側又は孔の内側に挿入して、夫々の周面に係着せ
しめて用いる止め輪において、前記開離部の両側に軸対
称をなして並設され、前記環状部の外周縁を切欠く複数
の外切欠き部と、周方向に相隣する外切欠き部間に夫々
位置し、前記環状部の内周縁を切欠く複数の内切欠き部
とを具備することを特徴とする止め輪。1. A circular portion, which is formed by cutting off a part of an annular ring by an opening portion having an appropriate width in the circumferential direction, the annular portion being deformed with the widening or contracting width of the opening portion, and a circular shape. In a retaining ring that is inserted into the outside of a shaft having a cross section or inside of a hole and is attached to each peripheral surface and used, the retaining rings are arranged side by side with axial symmetry on both sides of the opening portion, and outside the annular portion. A plurality of outer cutouts notched at the peripheral edge and a plurality of inner cutouts notched at the inner peripheral edge of the annular portion, which are respectively located between the outer notched portions adjacent to each other in the circumferential direction. And a snap ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4861892U JPH0594521U (en) | 1992-05-25 | 1992-05-25 | Retaining ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4861892U JPH0594521U (en) | 1992-05-25 | 1992-05-25 | Retaining ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0594521U true JPH0594521U (en) | 1993-12-24 |
Family
ID=12808403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4861892U Pending JPH0594521U (en) | 1992-05-25 | 1992-05-25 | Retaining ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0594521U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001208710A (en) * | 2000-01-26 | 2001-08-03 | Saginomiya Seisakusho Inc | Electric conductivity sensor |
| JP2007128756A (en) * | 2005-11-04 | 2007-05-24 | Toyota Industries Corp | Member fastening structure and electric compressor having its member fastening structure |
| JP2017525897A (en) * | 2014-06-25 | 2017-09-07 | ジーケーエヌ・ドライブライン・ノースアメリカ・インコーポレーテッド | Retainer for inner and outer shafts |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524943B1 (en) * | 1971-01-30 | 1977-02-08 | ||
| JPS5525288A (en) * | 1978-08-14 | 1980-02-22 | Sony Corp | Speaker |
| JPS6237612B2 (en) * | 1981-06-04 | 1987-08-13 | Mochida Pharm Co Ltd | |
| JPS6239012B2 (en) * | 1982-02-05 | 1987-08-20 | Hitachi Ltd |
-
1992
- 1992-05-25 JP JP4861892U patent/JPH0594521U/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524943B1 (en) * | 1971-01-30 | 1977-02-08 | ||
| JPS5525288A (en) * | 1978-08-14 | 1980-02-22 | Sony Corp | Speaker |
| JPS6237612B2 (en) * | 1981-06-04 | 1987-08-13 | Mochida Pharm Co Ltd | |
| JPS6239012B2 (en) * | 1982-02-05 | 1987-08-20 | Hitachi Ltd |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001208710A (en) * | 2000-01-26 | 2001-08-03 | Saginomiya Seisakusho Inc | Electric conductivity sensor |
| JP2007128756A (en) * | 2005-11-04 | 2007-05-24 | Toyota Industries Corp | Member fastening structure and electric compressor having its member fastening structure |
| US7959418B2 (en) | 2005-11-04 | 2011-06-14 | Kabushiki Kaisha Toyota Jidoshokki | Mounting structure and motor compressor having the same |
| JP2017525897A (en) * | 2014-06-25 | 2017-09-07 | ジーケーエヌ・ドライブライン・ノースアメリカ・インコーポレーテッド | Retainer for inner and outer shafts |
| US10634194B2 (en) | 2014-06-25 | 2020-04-28 | Gkn Driveline North America, Inc. | Retainer for inner and outer shafts |
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