JP5991108B2 - Fixing method of taper snap ring - Google Patents

Fixing method of taper snap ring Download PDF

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JP5991108B2
JP5991108B2 JP2012207068A JP2012207068A JP5991108B2 JP 5991108 B2 JP5991108 B2 JP 5991108B2 JP 2012207068 A JP2012207068 A JP 2012207068A JP 2012207068 A JP2012207068 A JP 2012207068A JP 5991108 B2 JP5991108 B2 JP 5991108B2
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snap ring
taper
ring
housing
taper snap
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JP2014062573A (en
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賢吾 村上
賢吾 村上
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NSK Ltd
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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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
    • F16B21/183—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details internal, i.e. with spreading action
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Description

この発明は、転がり軸受等を軸またはハウジング等に固定するために用いるテーパスナップリングに関する。   The present invention relates to a taper snap ring used for fixing a rolling bearing or the like to a shaft or a housing.

スナップリングは、ハウジングに挿入された軸類、例えばシャフトやピンあるいは筒状体の上記ハウジングに対する位置決めや抜け止め用として多く用いられている。しかしながら、上記穴用スナップリングに穴の軸線方向の荷重が繰り返し加わった場合、上記軸類支持穴形成部材の穴の内周面に形成されたスナップリング嵌挿溝（以下「止め輪溝」と呼ぶ）の形状が変形し、穴用スナップリングの外径を小さくする方向に力が作用し、上記穴用スナップリングが緩み出し、抜けることがあった。   The snap ring is often used for positioning and retaining of shafts inserted into the housing, for example, shafts, pins, or cylindrical bodies with respect to the housing. However, when a load in the axial direction of the hole is repeatedly applied to the hole snap ring, a snap ring insertion groove (hereinafter referred to as a “retaining ring groove”) formed on the inner peripheral surface of the hole of the shaft support hole forming member. The shape of the ring snap ring is deformed, a force acts in a direction to reduce the outer diameter of the hole snap ring, and the hole snap ring loosens and sometimes comes off.

この部分の改善の先行技術としては、特許文献１にあるように針状転がり軸受の位置決めや抜け止め用として、軸受穴用スナップリングのフック部と略等しい巾及び上記スナップリングの厚さと略等しい厚さを有するロック部材を、止め輪溝に嵌装状態の上記スナップリングの上記フック部間に挿入し、ロック部材の脚部を外力により上記止め輪溝内にて拡開させ、上記スナップリングのフック部に圧着し得るようにした発明がある。また、特許文献２には本発明に類似するテーパ部を有するスナップリングが記載されている。   As a prior art for improving this part, as disclosed in Patent Document 1, it is substantially the same width as the hook portion of the bearing ring snap ring and the thickness of the snap ring for positioning and retaining the needle-shaped rolling bearing. A lock member having a thickness is inserted between the hook portions of the snap ring fitted in the retaining ring groove, and the leg portion of the locking member is expanded in the retaining ring groove by an external force, and the snap ring There is an invention that can be crimped to the hook portion. Patent Document 2 describes a snap ring having a tapered portion similar to the present invention.

実開平６−１４５２３号公報Japanese Utility Model Publication No. 6-14523 実開平７−２１７６２４号公報Japanese Utility Model Publication No. 7-217624

しかしながら、特許文献１に記載の発明はスナップリングの他にロック部材が必要な為、コストや組立工数が増加する虞がある。また、テーパスナップリングに軸方向の大きな過重（以下、「アキシャル荷重」と呼ぶ）が負荷されると、テーパ部に楔の作用が生じてスナップリングを縮径させようとする力が発生するが、特許文献２の発明はテーパ部が止め輪溝の溝肩よりもハウジングの内径側に延長されており、スナップリングを縮径させようとする力が作用した際に、それを阻止する機能がない。本発明は、上記課題に鑑みてなされたものであり、ハウジングから抜けにくく、かつ部品点数が増えないためコストの上昇や組立工数の増加を抑制したテーパスナップリングを提供することを目的とする。   However, since the invention described in Patent Document 1 requires a lock member in addition to the snap ring, there is a risk that the cost and assembly man-hours increase. Also, when a large axial load (hereinafter referred to as “axial load”) is applied to the taper snap ring, a wedge acts on the taper portion to generate a force to reduce the diameter of the snap ring. In the invention of Patent Document 2, the taper portion is extended to the inner diameter side of the housing from the groove shoulder of the retaining ring groove, and when a force for reducing the diameter of the snap ring is applied, the taper portion has a function of preventing it. Absent. The present invention has been made in view of the above problems, and an object of the present invention is to provide a taper snap ring which is difficult to be removed from the housing and does not increase the number of parts and suppresses an increase in cost and an increase in assembly man-hours.

上記目的を達成するため、本発明は、軸受等をハウジングに固定する為のテーパスナップリングにおいて、スナップリング側のテーパ部がハウジングの止め輪溝に完全に入り込み、テーパ面がハウジングの溝肩に接触しないことを特徴としている。具体的には、テーパスナップリングをハウジングに装着した状態おいて、テーパスナップリングのテーパ部におけるエッジ部の直径がハウジングの内径より大きいことを特徴とする。   In order to achieve the above object, according to the present invention, in a taper snap ring for fixing a bearing or the like to a housing, the taper portion on the snap ring side completely enters the retaining ring groove of the housing, and the taper surface is in the groove shoulder of the housing. It is characterized by not touching. Specifically, in a state where the taper snap ring is attached to the housing, the diameter of the edge portion of the taper portion of the taper snap ring is larger than the inner diameter of the housing.

軸受からのアキシャル荷重によりテーパスナップリングが抜ける原因として、アキシャル荷重が負荷されることでテーパスナップリングがハウジングの溝肩を押圧して塑性変形させ、スナップリングが傾くためであると考えられる。本発明におけるテーパスナップリングは、テーパ部が止め輪溝に完全に入り込むことにより、ハウジング溝肩と接触しない構成となっている。このため、ハウジングの溝肩において塑性変形は生じず、テーパスナップリングは傾き難くなる。   It is considered that the taper snap ring comes off due to the axial load from the bearing because the taper snap ring presses the groove shoulder of the housing and plastically deforms due to the axial load being applied, and the snap ring tilts. The taper snap ring according to the present invention has a configuration in which the taper portion completely enters the retaining ring groove so that it does not contact the housing groove shoulder. For this reason, plastic deformation does not occur in the groove shoulder of the housing, and the taper snap ring is difficult to tilt.

一方、上記のような大きなアキシャル荷重が負荷された場合、止め輪溝のテーパ部に塑性変形が生じる可能性があるが、この場合には塑性変形によって生じたテーパ部の段差にテーパスナップリングのエッジ部が引っ掛かるため、エッジ部がストッパーとなってテーパスナップリングは逆に抜け難くなる。これらの作用により軸受のアキシャル荷重の負荷能力を増大させることができる。また本発明では、部品点数が増えないのでコストの上昇や組立工数の増加を抑制することができる。   On the other hand, when a large axial load as described above is applied, plastic deformation may occur in the taper portion of the retaining ring groove. In this case, the taper snap ring may be stepped on the step of the taper portion caused by plastic deformation. Since the edge portion is caught, the edge portion serves as a stopper and the taper snap ring is difficult to come off. By these actions, the load capacity of the axial load of the bearing can be increased. In the present invention, since the number of parts does not increase, an increase in cost and an increase in the number of assembly steps can be suppressed.

図１（ａ）は本発明に係るテーパスナップリングの正面図を示している。図１（ｂ）はＡ−Ａ断面における断面図を示している。Fig.1 (a) has shown the front view of the taper snap ring which concerns on this invention. FIG.1 (b) has shown sectional drawing in the AA cross section. 本発明に係るテーパスナップリングをハウジングに取り付けた状態を模式的に示す断面図である。It is sectional drawing which shows typically the state which attached the taper snap ring which concerns on this invention to the housing. 本発明に係るテーパスナップリングをハウジングに取り付けた状態におけるエッジ部とハウジング内径の位置関係を模式的に示す断面図である。It is sectional drawing which shows typically the positional relationship of the edge part and housing internal diameter in the state which attached the taper snap ring which concerns on this invention to the housing. 本発明に係るスナップリングがアキシャル荷重によって傾いた状態を模式的に示す断面図である。It is sectional drawing which shows typically the state which the snap ring which concerns on this invention inclines with the axial load. 従来のテーパスナップリングをハウジングに取り付けた状態を模式的に示す断面図である。It is sectional drawing which shows typically the state which attached the conventional taper snap ring to the housing.

以下、本発明に係るテーパスナップリング１について図面を参照しつつ説明する。   Hereinafter, the taper snap ring 1 according to the present invention will be described with reference to the drawings.

図１（ａ）は、本発明に係るテーパスナップリング１の正面図を、図１（ｂ）はそのＡ−Ａ断面における断面図を示している。テーパスナップリング１をハウジング３に取り付ける場合は、まず専用工具等を用いて外径を縮小させた状態にした上でハウジング３に挿入する。テーパスナップリング１がハウジング３に設けられた止め輪溝４の位置に達すると外径を拡大させて工具を外す。図２は本発明に係るテーパスナップリング１をハウジング３に装着した状態を示している。   1A is a front view of the taper snap ring 1 according to the present invention, and FIG. 1B is a cross-sectional view taken along the line AA. When attaching the taper snap ring 1 to the housing 3, the outer diameter is first reduced using a dedicated tool or the like, and then inserted into the housing 3. When the taper snap ring 1 reaches the position of the retaining ring groove 4 provided in the housing 3, the outer diameter is enlarged and the tool is removed. FIG. 2 shows a state in which the taper snap ring 1 according to the present invention is mounted on the housing 3.

前記止め輪溝４に嵌挿された前記テーパスナップリング１は、バネ力が径方向外側に働いて自分自身を拡径しようとする。その際、前記テーパスナップリング１のテーパ部１ａと前記止め輪溝４のテーパ部６の間に発生する楔の作用により前記テーパスナップリング１を軸受外輪２側に押圧し、軸受を軸方向に隙間無く固定する。   The taper snap ring 1 inserted in the retaining ring groove 4 tries to expand itself by a spring force acting radially outward. At that time, the taper snap ring 1 is pressed toward the bearing outer ring 2 by the action of a wedge generated between the taper portion 1a of the taper snap ring 1 and the taper portion 6 of the retaining ring groove 4, and the bearing is moved in the axial direction. Fix without gaps.

本発明に係るテーパスナップリング１は、止め輪溝４に嵌挿された状態ではテーパ部１ａがハウジング３の内径面９よりも径方向外側に完全に入り込むことを特徴とする。具体的には、前記テーパスナップリング１をハウジング３に装着した状態おいて、前記テーパスナップリング１のテーパ部１ａにおけるエッジ部８の直径Ｄ１がハウジング３の内径ｄより大きいことを特徴とする。この特徴がもたらす効果を以下、説明する。   The taper snap ring 1 according to the present invention is characterized in that the taper portion 1 a completely enters the radially outer side of the inner diameter surface 9 of the housing 3 in a state of being inserted into the retaining ring groove 4. Specifically, in a state where the taper snap ring 1 is mounted on the housing 3, the diameter D1 of the edge portion 8 in the taper portion 1a of the taper snap ring 1 is larger than the inner diameter d of the housing 3. The effects brought about by this feature will be described below.

図５に従来のテーパスナップリング７を用いて軸受外輪２をハウジング３に固定した状態の断面図を示す。軸受外輪２からアキシャル荷重Ｆが負荷されると、テーパスナップリング７がハウジング３の溝肩５を支点として図４上で反時計回りにわずかに傾くことによりハウジング３の溝肩５と線接触する（図４の破線は傾いた状態を示している）。このため、溝肩５での接触面圧が高くなり、溝肩５に塑性変形が生じることによりテーパスナップリング７が更に傾く。この影響によって大きなアキシャル荷重Ｆが負荷された場合には、従来のテーパスナップリング７は抜ける虞がある。   FIG. 5 is a sectional view showing a state in which the bearing outer ring 2 is fixed to the housing 3 using a conventional taper snap ring 7. When an axial load F is applied from the bearing outer ring 2, the taper snap ring 7 makes a line contact with the groove shoulder 5 of the housing 3 by slightly tilting counterclockwise on the groove shoulder 5 of the housing 3 in FIG. (The broken line in FIG. 4 shows a tilted state). For this reason, the contact surface pressure at the groove shoulder 5 is increased, and the taper snap ring 7 is further tilted by plastic deformation of the groove shoulder 5. When a large axial load F is applied due to this influence, the conventional taper snap ring 7 may come off.

しかし、本発明にかかるテーパスナップリング１は、テーパ部１ａがハウジング３の内径面９から径方向外側に完全に入り込む構成のため、前記テーパ部１ａはハウジング３の溝肩５と接触しない。このため、上記のような溝肩５の塑性変形は生じず、前記テーパスナップリング１は大きく傾くことがない。この結果、アキシャル荷重Ｆによって前記テーパスナップリング１が抜ける可能性は従来の製品よりも低くなる。   However, since the taper snap ring 1 according to the present invention is configured such that the taper portion 1 a completely enters the radially outer side from the inner diameter surface 9 of the housing 3, the taper portion 1 a does not contact the groove shoulder 5 of the housing 3. For this reason, the plastic deformation of the groove shoulder 5 as described above does not occur, and the taper snap ring 1 does not tilt significantly. As a result, the possibility that the taper snap ring 1 comes off due to the axial load F is lower than that of the conventional product.

一方、図４に示すように軸受外輪２から過大なアキシャル荷重Ｆが負荷された際に前記テーパスナップリング１に傾きが生じるため、止め輪溝４のテーパ部６に塑性変形が発生する。この場合には、前記テーパスナップリング１のエッジ部８が前記テーパ部６にめり込むため、前記エッジ部８と前記止め輪溝４の前記テーパ部６がストッパーの役割を果たし、前記テーパスナップリング１の縮径を阻害する。この結果、前記止め輪溝４の塑性変形が増大するほど前記テーパスナップリング１の抜けを防止する効果が生じる。上記の抜け止め効果により、軸受のアキシャル荷重負荷能力を増大させることができる。   On the other hand, as shown in FIG. 4, when the excessive axial load F is applied from the bearing outer ring 2, the taper snap ring 1 is inclined, so that the taper portion 6 of the retaining ring groove 4 is plastically deformed. In this case, since the edge portion 8 of the taper snap ring 1 is recessed into the taper portion 6, the edge portion 8 and the taper portion 6 of the retaining ring groove 4 serve as a stopper, and the taper snap ring 1. Inhibits diameter reduction. As a result, the effect of preventing the taper snap ring 1 from coming off increases as the plastic deformation of the retaining ring groove 4 increases. Due to the above retaining effect, the axial load capacity of the bearing can be increased.

前記テーパスナップリング１は、特に限定しないが、プレス加工や切削加工、または研磨加工にて製造することができる。また、前記の製造方法の中では、コストや加工時間の面ではプレス加工が好ましい。これにより、部品点数を増やさずにテーパスナップリング１を抜け難くすることができ、コストや組立工数が増加することを抑制する効果がある。   The taper snap ring 1 is not particularly limited, but can be manufactured by pressing, cutting, or polishing. Moreover, in the said manufacturing method, press work is preferable in terms of cost or processing time. Thereby, it is possible to make it difficult to remove the taper snap ring 1 without increasing the number of parts, and there is an effect of suppressing an increase in cost and assembly man-hours.

１ 本発明に係るテーパスナップリング
１ａ テーパ部
２ 軸受外輪
３ ハウジング
４ 止め輪溝
５ 溝肩
６ テーパ部
７ 従来のテーパスナップリング
８ エッジ部
９ 内径面
Ｆ アキシャル荷重 DESCRIPTION OF SYMBOLS 1 Tapered snap ring which concerns on this invention 1a Tapered part 2 Bearing outer ring 3 Housing 4 Retaining ring groove 5 Groove shoulder 6 Tapered part 7 Conventional taper snap ring 8 Edge part 9 Inner diameter surface F Axial load

Claims (1)

ハウジングの内周面に設けられた凹状の止め輪溝に嵌挿されることで軸受を軸方向に固定するテーパスナップリングの固定方法であって、
前記軸受を前記ハウジングの所定位置に配置し、
前記テーパスナップリングの外径を縮小した状態で前記ハウジングに挿入し、前記止め輪溝の軸方向位置で前記テーパスナップリングの外径を拡大させて前記テーパスナップリングを前記止め輪溝に嵌挿した状態おいて、前記テーパスナップリングのテーパ部におけるエッジ部の直径が前記ハウジングの内径及び前記軸受の外輪の外径より大きくなり、
前記止め輪溝に嵌挿された前記テーパスナップリングのバネ力が径方向外側に働き、前記テーパスナップリングのテーパ部と前記止め輪溝のテーパ部の間に発生する楔の作用により前記テーパスナップリングを前記軸受の外輪側に軸方向に押圧し、
前記軸受の外輪から軸方向に働くアキシャル荷重によって前記止め輪溝のテーパ部に前記テーパスナップリングの前記エッジ部がめり込み、前記止め輪部の前記テーパ部を塑性変形させることで、前記軸受の外輪を軸方向に固定する、
テーパスナップリングの固定方法。 A fixing method of the tapered snap ring for fixing the bearings in the axial direction by being inserted into the retaining ring groove of the concave provided on the inner peripheral surface of Haujin grayed,
Placing the bearing in place on the housing;
The taper snap ring is inserted into the housing with the outer diameter of the taper snap ring reduced, and the taper snap ring is inserted into the retaining ring groove by increasing the outer diameter of the taper snap ring at the axial position of the retaining ring groove. keep state, the tapered snap ring larger than the inner diameter and the outer diameter of the outer ring of the bearing of the diameter of the edge portion housing the tapered portion of the no longer,
The taper snap ring inserted into the retaining ring groove has a spring force acting radially outward, and the taper snap is caused by the action of a wedge generated between the tapered portion of the tapered snap ring and the tapered portion of the retaining ring groove. Pressing the ring axially against the outer ring side of the bearing,
By the axial load acting in the axial direction from the outer ring of the bearing, the edge part of the taper snap ring is recessed into the tapered part of the retaining ring groove, and the tapered part of the retaining ring part is plastically deformed, thereby Fixed in the axial direction,
Fixing method of taper snap ring.
JP2012207068A 2012-09-20 2012-09-20 Fixing method of taper snap ring Expired - Fee Related JP5991108B2 (en)

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