WO2017051880A1 - Anti-friction bearing - Google Patents

Anti-friction bearing Download PDF

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Publication number
WO2017051880A1
WO2017051880A1 PCT/JP2016/078038 JP2016078038W WO2017051880A1 WO 2017051880 A1 WO2017051880 A1 WO 2017051880A1 JP 2016078038 W JP2016078038 W JP 2016078038W WO 2017051880 A1 WO2017051880 A1 WO 2017051880A1
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WO
WIPO (PCT)
Prior art keywords
retaining ring
ring
groove
fitted
tapered surface
Prior art date
Application number
PCT/JP2016/078038
Other languages
French (fr)
Japanese (ja)
Inventor
幹隆 佐波
Original Assignee
Ntn株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2017051880A1 publication Critical patent/WO2017051880A1/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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/74—Positive connections with complementary interlocking parts with snap-fit, e.g. by clips
    • 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
    • F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip

Definitions

  • This invention relates to a rolling bearing capable of fixing an annular protective member such as a seal or shield to a race ring with a retaining ring.
  • an annular protective member is attached to a raceway ring using a retaining ring.
  • the protective member has a peripheral edge that can be fitted to the raceway from the axial direction.
  • the raceway ring has a stepped fitting portion that receives the peripheral edge portion of the protection member from the radial direction and the raceway surface side, and a retaining ring groove.
  • the retaining ring fitted in the retaining ring groove prevents the protective member fitted in the fitting portion of the raceway ring from coming off from the outside in the axial direction (for example, Patent Document 1 below).
  • this type of rolling bearing after measuring the internal clearance of the rolling bearing incorporated between the shaft and the housing, the inside of the bearing can be protected by mounting a protective member and a retaining ring.
  • the portion of the inner surface of the groove that forms the retaining ring groove that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width closer to the groove bottom.
  • a radial gap is set between the groove bottom of the groove inner surface and the retaining ring. The retaining ring is fitted into the retaining ring groove so as to be interposed between the peripheral portion of the protective member and the tapered surface in a reduced diameter state from the natural state.
  • the protective member may not be properly fixed by the retaining ring fitted in the retaining ring groove.
  • the cause of this improper fixing was investigated.
  • the retaining ring interposed between the protective member and the peripheral edge of the protective member becomes an improper posture in which the retaining ring warps along the tapered surface.
  • the axial component force due to the tension of the retaining ring is weakened.
  • the contact area becomes smaller, the friction between the retaining ring and the protective member becomes weaker, and the protective member cannot be fixed by the retaining ring.
  • the problem to be solved by the present invention is to prevent improper fixing of the annular protective member to the raceway ring by devising the stop ring itself.
  • a first invention includes a bearing ring, a protection member having a peripheral edge that can be fitted to the race ring from an axial direction, and the protection member fitted to the race ring.
  • the portion of the groove inner surface forming the retaining ring groove that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width toward the groove bottom.
  • the retaining ring is around the edge of the retaining ring that contacts the tapered surface.
  • a configuration in which the protective member is formed in advance in a shape warped toward the peripheral edge side is adopted.
  • the retaining ring since the retaining ring that is formed in advance around the edge of the retaining ring that is brought into contact with the tapered surface is warped toward the periphery of the protective member, the retaining ring is employed.
  • the retaining ring When the retaining ring is fitted in this way, the retaining ring having the above-described warp exerts a spring action that presses the peripheral edge portion of the protection member against the fitting portion of the raceway ring in the axial direction.
  • This spring action improves the friction between the retaining ring and the protective member, and the friction between the protective member and the fitting part of the raceway ring, and the retaining ring is bent in an improper posture along the tapered surface due to an impact or the like. It is prevented. Therefore, according to the first aspect of the present invention, it is possible to prevent improper fixing of the annular protective member to the raceway ring by devising the retaining ring itself.
  • the second invention includes a race ring, a protection member having a peripheral edge that can be fitted to the race ring from an axial direction, and the protection member fitted to the race ring.
  • the portion of the groove inner surface forming the retaining ring groove that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width toward the groove bottom.
  • the retaining ring has a slip stopper at least in the contact part with the tapered surface and the contact part with the peripheral part of the protective member, so that the retaining ring is stopped by vibration or impact. It becomes difficult to move and move deeply into the groove. For this reason, it is prevented that the retaining ring warps in an incorrect posture along the tapered surface. Therefore, the second invention can prevent improper fixing of the annular protective member to the raceway ring by the device of the retaining ring itself.
  • the first or second invention can prevent improper fixing of the annular protective member to the race ring by devising the stop ring itself to warp or prevent the slip ring in advance.
  • Sectional drawing which shows the snap ring vicinity which concerns on 1st embodiment of this invention
  • Sectional drawing which shows the rolling bearing which concerns on 1st embodiment of this invention
  • the side view which shows the mark part vicinity of the retaining ring which concerns on 1st embodiment of this invention
  • the side view which shows the mark part vicinity of the retaining ring which concerns on 2nd embodiment of this invention
  • the side view which shows the mark part vicinity of the retaining ring which concerns on 3rd embodiment of this invention
  • the side view which shows the mark part of the retaining ring which concerns on 4th embodiment of this invention Side view opposite to FIG.
  • the rolling bearing shown in FIGS. 1 and 2 includes an inner race ring (inner ring) 1, an outer race ring (outer ring) 2, a rolling element 3 interposed between the inner and outer race rings 1, 2, A cage 4 that holds the moving body 3, an annular protective member 5 that seals the inside of the bearing with respect to the outside, and a retaining ring 6 that fixes the protective member 5 to the raceway ring 2 are provided.
  • axial direction the direction along the bearing central axis of the rolling bearing
  • radial direction the direction perpendicular to the bearing central axis
  • the circumferential direction is simply referred to as “circumferential direction”.
  • the protective member 5 is a seal having a peripheral edge 7 that can be fitted to the race 2 in the axial direction.
  • the protective member 5 can be a non-contact seal or shield.
  • the side surfaces on both axial sides of the peripheral edge portion 7 are flat surfaces along the radial direction.
  • the rolling bearing of the illustrated example is a self-aligning roller bearing with a seal
  • it can be a radial bearing of an appropriate type such as a cylindrical roller bearing, a tapered roller bearing, or a ball bearing.
  • the race ring 2 includes a stepped fitting portion 8 that receives the peripheral portion 7 of the protective member 5 from the radial direction and the raceway surface side, and a retaining ring groove 9 into which the retaining ring 6 can be fitted.
  • the side surface of the fitting portion 8 that receives the peripheral edge portion 7 in the axial direction is a flat surface along the radial direction.
  • the peripheral surface of the fitting portion 8 that receives the peripheral portion 7 in the radial direction is a cylindrical surface extending over the entire circumference.
  • the portion that receives the retaining ring 6 from the outside in the axial direction is a tapered surface 10 that is inclined so as to narrow the groove width closer to the groove bottom.
  • the portion facing the taper surface 10 in the axial direction is a flat surface 11 along the radial direction.
  • the groove bottom 12 that connects the tapered surface 10 and the flat surface 11 is substantially cylindrical over the entire circumference.
  • the axially outer side surface of the peripheral edge portion 7 fitted to the fitting portion 8 protrudes from the flat surface 11 outward in the axial direction. This is to prevent the flat surface 11 from obstructing the contact between the retaining ring 6 and the peripheral edge portion 7.
  • fitting part 8 and the retaining ring groove 9 are located only between the raceway surface of the raceway ring 2 and the side surface that defines the width of the raceway ring 2. This is because if the fitting portion 8 and the retaining ring groove 9 are extended to a position overlapping the raceway surface in the radial direction, the bearing rigidity when receiving a heavy load on the raceway surface is reduced.
  • the retaining ring 6 is fitted in the retaining ring groove 9 so as to be interposed between the peripheral edge portion 7 of the protective member 5 and the tapered surface 10 in a state where the diameter of the retaining ring 6 is reduced from the natural state.
  • the retaining ring 6 fitted in the retaining ring groove 9 fixes the protective member 5 to the bearing ring 2 in a state where the peripheral edge portion 7 is fitted to the fitting portion 8 of the bearing ring 2.
  • a radial gap 13 is set between the groove bottom 12 and the retaining ring 6.
  • the clearance 13 allows elastic repulsion of the retaining ring 6 when the retaining ring 6 is in contact with the tapered surface 10 and the axially outer side surface of the peripheral edge portion 7, and the tapered surface 10 generates an axial component force. It is a space for doing so.
  • the retaining ring 6 has a rectangular cross section, and at the diagonal position of the rectangular cross section, an edge portion 14 that is in contact with the tapered surface 10 and an edge portion 15 that is in contact with the side surface on the outer side in the axial direction of the peripheral edge portion 7.
  • the retaining ring 6 is formed in advance in a shape that warps toward the peripheral edge 7 of the protective member 5 around the edge 14 that is brought into contact with the tapered surface 10.
  • the retaining ring 6 shown in FIG. 2 is fitted in the retaining ring groove 9 on the right side in the figure, the entire retaining ring 6 is warped in the clockwise direction around the edge portion 14 in advance. It has a different shape.
  • the warp preliminarily applied to the retaining ring 6 does not disappear even when fitted in the retaining ring groove 9, and the shaft is between the axially outer side surface of the peripheral edge portion 7 and the tapered surface 10. Has a spring action in the direction.
  • the retaining ring 6 has a mark portion 16 indicating the direction of the retaining ring 6 fitted in the retaining ring groove 9.
  • the mark part 16 is provided by making the both ends of the circumferential direction of the retaining ring 6 into a different shape.
  • the mark portion 16 has a tapered end face inclined with respect to the radial direction. Considering the line of sight of an operator located outside the bearing, when the retaining ring 6 is oriented so that the mark portion 16 is located on the right side in the figure, the regular portion 14 can be brought into contact with the tapered surface 10. The direction of the retaining ring 6 is indicated.
  • the rolling bearing according to the first embodiment is as described above, and has a shape that warps in advance to the peripheral edge side of the protective member around the edge 14 of the retaining ring 6 that contacts the tapered surface 10 of the retaining ring groove 9. Since the retaining ring 6 formed in advance is adopted, when the retaining ring 6 is fitted in such a manner, the retaining ring 6 having the above-described warpage is connected to the peripheral portion 7 of the protection member 5 with respect to the raceway ring 2. There is a spring action of pressing the fitting portion 8 in the axial direction.
  • This spring action improves the friction between the retaining ring 6 and the protective member 5 and between the protective member 5 and the fitting portion 8 of the raceway ring 2 so that the retaining ring 6 follows the tapered surface 10 due to impact or the like. It is possible to prevent a warped and incorrect posture. Therefore, this rolling bearing can prevent improper fixing of the annular protective member 5 to the raceway ring 2 by devising the retaining ring 6 itself.
  • this rolling bearing has a mark portion 16 indicating the direction of the retaining ring 6 fitted in the retaining ring groove 9, the retaining ring 6 that exerts the above-described spring action on an operator who fits the retaining ring 6. It is possible to prevent the poor fitting by informing the direction.
  • the second embodiment is shown in FIG.
  • the mark portion 20 is changed from the first embodiment. That is, the mark part 20 consists of a through-hole part formed only at one end part of the retaining ring. Considering the line of sight of an operator located outside the bearing, when the mark portion 20 is in the direction of the retaining ring located on the left side in the drawing, it indicates that the direction is the normal retaining ring.
  • FIG. 5 shows a third embodiment.
  • the mark portion 30 is changed from the first embodiment. That is, the mark portion 30 is composed of one or more groove streaks formed only at one end portion of the side surface 31 to be directed outward in the axial direction.
  • the mark portion 30 in the illustrated example is a plurality of parallel groove portions in order to improve visibility. Considering the line of sight of an operator located outside the bearing, when the mark portion 30 is in the direction of the retaining ring located on the left side in the drawing, it indicates that it is in the normal retaining ring direction.
  • the fourth embodiment is shown in FIGS. 6A and 6B.
  • 4th embodiment changes the aspect of the mark part 40 from 1st embodiment.
  • the mark portion 40 is provided by making the both side surfaces of the retaining ring different from each other.
  • the mark part 40 of the example of illustration consists of the side surface of the axial direction outer side of the colored retaining ring.
  • the side surface 41 to be directed inward in the axial direction is made of a surface of a metal material that forms a rectangular cross section of the retaining ring.
  • the mark portion 40 is a coating film having a color that is clearly different from the surface of the metal material. Considering the line of sight of the worker located outside the bearing, when the mark portion 40 is in the direction of the retaining ring facing the worker, it indicates that it is in the normal retaining ring direction.
  • FIG. 7 shows the fifth embodiment.
  • the edge 51 to be brought into contact with the tapered surface 10 and the edge 52 to be brought into contact with the peripheral edge 7 of the protection member 5 are the axes of the tapered surface 10 or the peripheral portion 7 that are contact partners. It has a shape along the side surface on the outside in the direction. If it does in this way, the contact area of the edge part 51 and the taper surface 10 and the contact area of the edge part 52 and the peripheral part 7 will each expand rather than 1st embodiment. For this reason, in the fifth embodiment, the protection member 5 can be firmly fixed to the track ring 2.
  • both the edges 51 and 52 are shaped along the contact partner, but only one of the edges 51 and 52 may be shaped along the contact partner depending on the required fixing strength.
  • the tapered edge 51 also serves as a mark. That is, when the retaining ring is oriented such that the edge 51 is located on the outer diameter side, it indicates that the edge 51 is in the proper retaining ring orientation.
  • FIG. 8 shows the sixth embodiment.
  • the sixth embodiment corresponds to the second invention described above.
  • the retaining ring 60 according to the sixth embodiment does not warp the retaining ring 60 in advance, and at least the contact portion with the tapered surface 10 and the protective member 5 of the retaining ring 60.
  • the first embodiment is different from the first embodiment in that the contact portions with the peripheral edge portion 7 have anti-slip members 61 and 62.
  • the slip stoppers 61 and 62 are formed of a surface portion having a static friction coefficient increased with respect to the surface of the metal material forming the rectangular cross section of the retaining ring 60, and are axially outer sides of the tapered surface 10 of the contact partner and the peripheral edge portion 7.
  • the retaining ring 60 is prevented from shifting in the radial direction with respect to the side surface.
  • the slip stoppers 61 and 62 are made of an elastic material attached to the surface of a metal material that forms a rectangular cross section of the retaining ring 60.
  • the elastic material include rubber.
  • the slip stoppers 61 and 62 are provided in series so as to straddle the outer diameter of the retaining ring 60 in order to easily attach them. However, they may be provided separately.
  • the contact portion with the tapered surface 10 and the contact portion with the peripheral portion 7 of the protective member 5 are provided with the slip stoppers 61 and 62 in the retaining ring 60.
  • the ring 60 becomes difficult to move so as to enter the retaining ring groove 9 deeply. For this reason, it is possible to prevent the retaining ring 60 from taking an illegal posture along the tapered surface 10. Therefore, the sixth embodiment can prevent improper fixing of the annular protection member 5 to the raceway ring 2 by devising the retaining ring 60 itself.
  • the seventh embodiment is shown in FIGS. 9A and 9B.
  • the seventh embodiment is a further modification of the sixth embodiment.
  • the slip stopper 71 at the contact portion with the tapered surface 10 and the slip stoppers 71 and 72 at the contact portion with the peripheral edge portion 7 each form a rectangular cross section of the retaining ring 70. It consists of a large number of groove streaks formed on the surface of the metal material.
  • These slip stoppers 71 and 72 are formed by a twill knurling process in which two grooving portions that are inclined with respect to the axial direction and the radial direction intersect.
  • the slip stoppers 71 and 72 are formed on the entire both side surfaces of the retaining ring 70, but may be at least at the contact portion with the tapered surface 10 and the contact portion with the peripheral portion 7 of the protection member 5.
  • the embodiment disclosed this time should be considered as illustrative in all points and not restrictive.
  • the warp as in the first embodiment is performed. All you have to do is use a pre-set retaining ring.
  • the example in which the retaining ring is attached to the outer race ring has been shown.
  • the first invention and the second invention are similarly applied. It is possible to apply this invention.
  • the scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

A retaining ring (6) is formed in advance into a shape that curves toward a peripheral part (7) of a protecting member (5) around an edge part (14) brought into contact with a tapered surface (10) of a groove inner surface that forms a retaining ring groove (9). The retaining ring (6), fitted into the retaining ring groove (9), exhibits a spring action for pushing the peripheral part (7) of the protecting member (5) in an axial direction toward a fitting part (8) of a bearing race (2).

Description

転がり軸受Rolling bearing
　この発明は、シール、シールドのような環状の保護部材を止め輪で軌道輪に固定可能な転がり軸受に関する。 This invention relates to a rolling bearing capable of fixing an annular protective member such as a seal or shield to a race ring with a retaining ring.
　従来、止め輪を利用して軌道輪に環状の保護部材を装着することが行われている。その保護部材は、軌道輪に軸方向から嵌合可能な周縁部をもっている。一方、軌道輪は、保護部材の周縁部を径方向及び軌道面側から受ける段差状の嵌合部と、止め輪溝とを有する。止め輪溝に嵌着された止め輪は、軌道輪の嵌合部に嵌合された保護部材を軸方向外側から抜け止めする（例えば、下記特許文献１）。この種の転がり軸受によれば、軸とハウジング間に組み込んだ転がり軸受の軸受内部すきまの測定後、保護部材、止め輪を装着して軸受内部を保護することができる。 Conventionally, an annular protective member is attached to a raceway ring using a retaining ring. The protective member has a peripheral edge that can be fitted to the raceway from the axial direction. On the other hand, the raceway ring has a stepped fitting portion that receives the peripheral edge portion of the protection member from the radial direction and the raceway surface side, and a retaining ring groove. The retaining ring fitted in the retaining ring groove prevents the protective member fitted in the fitting portion of the raceway ring from coming off from the outside in the axial direction (for example, Patent Document 1 below). According to this type of rolling bearing, after measuring the internal clearance of the rolling bearing incorporated between the shaft and the housing, the inside of the bearing can be protected by mounting a protective member and a retaining ring.
　この種の転がり軸受の中には、保護部材を軌道輪により強固に固定するため、止め輪の張力を利用して保護部材の周縁部を軌道輪の嵌合部に押し付けるものがある。このような転がり軸受の場合、止め輪溝を形成する溝内面のうち、止め輪を軸方向外側から受ける部分は、溝底に近くなる程に溝幅を狭くするように傾斜したテーパ面になっており、その溝内面の溝底部と止め輪との間に径方向の隙間が設定されている。止め輪は、自然状態から縮径状態で保護部材の周縁部とテーパ面間に介在するように止め輪溝に嵌着される。この嵌着状態において止め輪と溝内面の溝底部との間に隙間があるため、止め輪は、張力によって弾性回復しようとし続け、その張力を受ける溝内面のテーパ面は、軸方向の分力を生み出す。この分力は、保護部材の周縁部に与えられ、その周縁部を軌道輪の嵌合部に向かって軸方向に押し付ける外力として作用する。 Some of these types of rolling bearings use the tension of the retaining ring to press the periphery of the protective member against the fitting part of the race ring in order to firmly fix the protection member with the race ring. In the case of such a rolling bearing, the portion of the inner surface of the groove that forms the retaining ring groove that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width closer to the groove bottom. A radial gap is set between the groove bottom of the groove inner surface and the retaining ring. The retaining ring is fitted into the retaining ring groove so as to be interposed between the peripheral portion of the protective member and the tapered surface in a reduced diameter state from the natural state. In this fitted state, since there is a gap between the retaining ring and the groove bottom of the groove inner surface, the retaining ring keeps trying to recover elastically by the tension, and the taper surface of the groove inner surface receiving the tension has an axial component force. Produce. This component force is applied to the peripheral portion of the protective member, and acts as an external force that presses the peripheral portion in the axial direction toward the fitting portion of the raceway ring.
特開２００７－２３９７７４号公報（要約書）JP 2007-239774 A (Abstract)
　しかしながら、止め輪溝に嵌着された止め輪によって保護部材を適切に固定できない場合があった。この固定不良の原因を検討したところ、止め輪の嵌着不良、嵌着状態の止め輪に加えられた振動や衝撃で止め輪が止め輪溝へ深く入り込む等の理由により、溝内面のテーパ面と保護部材の周縁部との間に介在する止め輪がテーパ面に沿うように反った不正な姿勢となり、その結果、止め輪の張力による軸方向の分力が弱まったり、止め輪と保護部材の接触面積が小さくなって止め輪と保護部材間の摩擦が弱まったりし、止め輪で保護部材を固定できなくなることであった。 However, the protective member may not be properly fixed by the retaining ring fitted in the retaining ring groove. The cause of this improper fixing was investigated. The taper surface on the inner surface of the groove due to poor fitting of the retaining ring or because the retaining ring penetrates deeply into the retaining ring groove due to vibration or impact applied to the retaining ring. The retaining ring interposed between the protective member and the peripheral edge of the protective member becomes an improper posture in which the retaining ring warps along the tapered surface. As a result, the axial component force due to the tension of the retaining ring is weakened. The contact area becomes smaller, the friction between the retaining ring and the protective member becomes weaker, and the protective member cannot be fixed by the retaining ring.
　上述の背景に鑑み、この発明が解決しようとする課題は、軌道輪に対する環状の保護部材の固定不良を止め輪自体の工夫で防止することにある。 In view of the above-mentioned background, the problem to be solved by the present invention is to prevent improper fixing of the annular protective member to the raceway ring by devising the stop ring itself.
　上記の課題を達成するため、第一の発明は、軌道輪と、前記軌道輪に軸方向から嵌合可能な周縁部を有する保護部材と、前記軌道輪に嵌合された前記保護部材を前記軌道輪に固定する止め輪とを備え、前記軌道輪が、前記保護部材の周縁部を径方向及び軌道面側から受ける段差状の嵌合部と、前記止め輪を嵌着可能な止め輪溝とを有し、前記止め輪溝を形成する溝内面のうち、前記止め輪を軸方向外側から受ける部分が、溝底に近くなる程に溝幅を狭くするように傾斜したテーパ面になっており、前記溝内面の溝底部と前記止め輪との間に、径方向の隙間が設定されている転がり軸受において、前記止め輪が、前記テーパ面に接触させる当該止め輪の縁部回りに前記保護部材の周縁部側へ反った形状に予め形成されている、という構成を採用したものである。 In order to achieve the above object, a first invention includes a bearing ring, a protection member having a peripheral edge that can be fitted to the race ring from an axial direction, and the protection member fitted to the race ring. A retaining ring fixed to the bearing ring, wherein the bearing ring receives a peripheral edge of the protection member from the radial direction and the raceway surface side, and a retaining ring groove into which the retaining ring can be fitted. The portion of the groove inner surface forming the retaining ring groove that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width toward the groove bottom. In a rolling bearing in which a radial gap is set between the groove bottom of the groove inner surface and the retaining ring, the retaining ring is around the edge of the retaining ring that contacts the tapered surface. A configuration in which the protective member is formed in advance in a shape warped toward the peripheral edge side is adopted. One in which the.
　上記第一の発明に係る構成によれば、テーパ面に接触させる止め輪の縁部回りに保護部材の周縁部側へ反った形状に予め形成されている止め輪を採用しているので、そのように止め輪を嵌着すると、前述の反りを予めもっている止め輪は、保護部材の周縁部を軌道輪の嵌合部へ軸方向に押し付けるスプリング作用を奏する。このスプリング作用により、止め輪と保護部材間、保護部材と軌道輪の嵌合部間の摩擦が向上させられ、また、衝撃等で止め輪がテーパ面に沿うように反った不正な姿勢になることが防止される。したがって、第一の発明は、軌道輪に対する環状の保護部材の固定不良を止め輪自体の工夫で防止することができる。 According to the first aspect of the present invention, since the retaining ring that is formed in advance around the edge of the retaining ring that is brought into contact with the tapered surface is warped toward the periphery of the protective member, the retaining ring is employed. When the retaining ring is fitted in this way, the retaining ring having the above-described warp exerts a spring action that presses the peripheral edge portion of the protection member against the fitting portion of the raceway ring in the axial direction. This spring action improves the friction between the retaining ring and the protective member, and the friction between the protective member and the fitting part of the raceway ring, and the retaining ring is bent in an improper posture along the tapered surface due to an impact or the like. It is prevented. Therefore, according to the first aspect of the present invention, it is possible to prevent improper fixing of the annular protective member to the raceway ring by devising the retaining ring itself.
　上記の課題を達成するため、第二の発明は、軌道輪と、前記軌道輪に軸方向から嵌合可能な周縁部を有する保護部材と、前記軌道輪に嵌合された前記保護部材を前記軌道輪に固定する止め輪とを備え、前記軌道輪が、前記保護部材の周縁部を径方向及び軌道面側から受ける段差状の嵌合部と、前記止め輪を嵌着可能な止め輪溝とを有し、前記止め輪溝を形成する溝内面のうち、前記止め輪を軸方向外側から受ける部分が、溝底に近くなる程に溝幅を狭くするように傾斜したテーパ面になっており、前記溝内面の溝底部と前記止め輪との間に、径方向の隙間が設定されている転がり軸受において、前記止め輪のうち、少なくとも前記テーパ面との接触部及び前記保護部材の周縁部との接触部に滑り止めを有する、という構成を採用したものである。 In order to achieve the above object, the second invention includes a race ring, a protection member having a peripheral edge that can be fitted to the race ring from an axial direction, and the protection member fitted to the race ring. A retaining ring fixed to the bearing ring, wherein the bearing ring receives a peripheral edge of the protection member from the radial direction and the raceway surface side, and a retaining ring groove into which the retaining ring can be fitted. The portion of the groove inner surface forming the retaining ring groove that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width toward the groove bottom. In a rolling bearing in which a radial gap is set between the groove bottom portion of the groove inner surface and the retaining ring, at least the contact portion of the retaining ring with the tapered surface and the peripheral edge of the protective member It has a structure that has a non-slip in the contact part with the part That.
　上記第二の発明に係る構成によれば、止め輪のうち、少なくともテーパ面との接触部及び保護部材の周縁部との接触部に滑り止めを有するので、振動や衝撃で止め輪が止め輪溝へ深く入り込むようにずれ動きにくくなる。このため、止め輪がテーパ面に沿うように反った不正な姿勢になることが防止される。したがって、第二の発明は、軌道輪に対する環状の保護部材の固定不良を止め輪自体の工夫で防止することができる。 According to the configuration according to the second aspect of the present invention, the retaining ring has a slip stopper at least in the contact part with the tapered surface and the contact part with the peripheral part of the protective member, so that the retaining ring is stopped by vibration or impact. It becomes difficult to move and move deeply into the groove. For this reason, it is prevented that the retaining ring warps in an incorrect posture along the tapered surface. Therefore, the second invention can prevent improper fixing of the annular protective member to the raceway ring by the device of the retaining ring itself.
　上述のように、第一又は第二の発明は、止め輪に予め反り又は滑り止めをもたせる、という止め輪自体の工夫により、軌道輪に対する環状の保護部材の固定不良を防止することができる。 As described above, the first or second invention can prevent improper fixing of the annular protective member to the race ring by devising the stop ring itself to warp or prevent the slip ring in advance.
この発明の第一実施形態に係る止め輪付近を示す断面図Sectional drawing which shows the snap ring vicinity which concerns on 1st embodiment of this invention この発明の第一実施形態に係る転がり軸受を示す断面図Sectional drawing which shows the rolling bearing which concerns on 1st embodiment of this invention この発明の第一実施形態に係る止め輪の目印部付近を示す側面図The side view which shows the mark part vicinity of the retaining ring which concerns on 1st embodiment of this invention この発明の第二実施形態に係る止め輪の目印部付近を示す側面図The side view which shows the mark part vicinity of the retaining ring which concerns on 2nd embodiment of this invention この発明の第三実施形態に係る止め輪の目印部付近を示す側面図The side view which shows the mark part vicinity of the retaining ring which concerns on 3rd embodiment of this invention この発明の第四実施形態に係る止め輪の目印部を示す側面図The side view which shows the mark part of the retaining ring which concerns on 4th embodiment of this invention 図６Ａと反対側の側面図Side view opposite to FIG. 6A この発明の第五実施形態に係る止め輪付近を示す断面図Sectional drawing which shows the snap ring vicinity which concerns on 5th embodiment of this invention この発明の第六実施形態に係る止め輪付近を示す断面図Sectional drawing which shows the snap ring vicinity which concerns on 6th embodiment of this invention この発明の第七実施形態に係る止め輪付近を示す断面図Sectional drawing which shows the retaining ring vicinity which concerns on 7th embodiment of this invention 第七実施形態に係る滑り止めを示す側面図Side view showing the anti-slip according to the seventh embodiment
　以下、この発明の第一実施形態を図１～図３に基づいて説明する。第一実施形態は、上述の第一の発明に対応するものである。図１、図２に示す転がり軸受は、内方の軌道輪（内輪）１と、外方の軌道輪（外輪）２と、内外の軌道輪１，２間に介在する転動体３と、転動体３を保持する保持器４と、軸受内部を外部に対して密封する環状の保護部材５と、保護部材５を軌道輪２に固定する止め輪６とを備える。以下、この転がり軸受の軸受中心軸に沿った方向のことを単に「軸方向」といい、その軸受中心軸に直角な方向のことを単に「径方向」といい、その軸受中心軸周りの円周方向のことを単に「周方向」という。 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The first embodiment corresponds to the first invention described above. The rolling bearing shown in FIGS. 1 and 2 includes an inner race ring (inner ring) 1, an outer race ring (outer ring) 2, a rolling element 3 interposed between the inner and outer race rings 1, 2, A cage 4 that holds the moving body 3, an annular protective member 5 that seals the inside of the bearing with respect to the outside, and a retaining ring 6 that fixes the protective member 5 to the raceway ring 2 are provided. Hereinafter, the direction along the bearing central axis of the rolling bearing is simply referred to as “axial direction”, and the direction perpendicular to the bearing central axis is simply referred to as “radial direction”. The circumferential direction is simply referred to as “circumferential direction”.
　保護部材５は、軌道輪２に軸方向から嵌合可能な周縁部７を有するシールになっている。保護部材５は、非接触シール、シールドにすることも可能である。周縁部７の軸方向両側の側面は、それぞれ径方向に沿った平坦面になっている。 The protective member 5 is a seal having a peripheral edge 7 that can be fitted to the race 2 in the axial direction. The protective member 5 can be a non-contact seal or shield. The side surfaces on both axial sides of the peripheral edge portion 7 are flat surfaces along the radial direction.
　図示例の転がり軸受は、シール付き自動調心ころ軸受としたが、円筒ころ軸受、円すいころ軸受、玉軸受等、適宜の形式のラジアル軸受にすることが可能である。 Although the rolling bearing of the illustrated example is a self-aligning roller bearing with a seal, it can be a radial bearing of an appropriate type such as a cylindrical roller bearing, a tapered roller bearing, or a ball bearing.
　図２に示すように、軌道輪２は、保護部材５の周縁部７を径方向及び軌道面側から受ける段差状の嵌合部８と、止め輪６を嵌着可能な止め輪溝９とを有する。 As shown in FIG. 2, the race ring 2 includes a stepped fitting portion 8 that receives the peripheral portion 7 of the protective member 5 from the radial direction and the raceway surface side, and a retaining ring groove 9 into which the retaining ring 6 can be fitted. Have
　周縁部７を軸方向に受ける嵌合部８の側面は、径方向に沿った平坦面になっている。周縁部７を径方向に受ける嵌合部８の周面は、周方向全周に亘る円筒面になっている。 The side surface of the fitting portion 8 that receives the peripheral edge portion 7 in the axial direction is a flat surface along the radial direction. The peripheral surface of the fitting portion 8 that receives the peripheral portion 7 in the radial direction is a cylindrical surface extending over the entire circumference.
　止め輪溝９を形成する溝内面のうち、止め輪６を軸方向外側から受ける部分は、溝底に近くなる程に溝幅を狭くするように傾斜したテーパ面１０になっている。その溝内面のうち、テーパ面１０と軸方向に面する部分は、径方向に沿った平坦面１１になっている。その溝内面のうち、テーパ面１０と平坦面１１を繋ぐ溝底部１２は、周方向全周に亘って概ね円筒面になっている。 Of the inner surface of the groove that forms the retaining ring groove 9, the portion that receives the retaining ring 6 from the outside in the axial direction is a tapered surface 10 that is inclined so as to narrow the groove width closer to the groove bottom. Of the inner surface of the groove, the portion facing the taper surface 10 in the axial direction is a flat surface 11 along the radial direction. Of the inner surface of the groove, the groove bottom 12 that connects the tapered surface 10 and the flat surface 11 is substantially cylindrical over the entire circumference.
　嵌合部８に嵌合された周縁部７の軸方向外側の側面は、その平坦面１１から軸方向外側に食み出るようになっている。これは、止め輪６と周縁部７との接触を平坦面１１によって阻害しないようにするためである。 The axially outer side surface of the peripheral edge portion 7 fitted to the fitting portion 8 protrudes from the flat surface 11 outward in the axial direction. This is to prevent the flat surface 11 from obstructing the contact between the retaining ring 6 and the peripheral edge portion 7.
　なお、嵌合部８及び止め輪溝９は、軌道輪２の軌道面と、軌道輪２の幅を規定する側面との間のみに位置している。これは、嵌合部８や止め輪溝９を軌道面と径方向に重なる位置に及ばせると、軌道面で重荷重を受けるときの軸受剛性が低下するためである。 In addition, the fitting part 8 and the retaining ring groove 9 are located only between the raceway surface of the raceway ring 2 and the side surface that defines the width of the raceway ring 2. This is because if the fitting portion 8 and the retaining ring groove 9 are extended to a position overlapping the raceway surface in the radial direction, the bearing rigidity when receiving a heavy load on the raceway surface is reduced.
　止め輪６は、止め輪６の自然状態から縮径させられた状態で保護部材５の周縁部７とテーパ面１０との間に介在するように止め輪溝９に嵌着される。止め輪溝９に嵌着された止め輪６は、軌道輪２の嵌合部８に周縁部７が嵌合された状態で保護部材５を軌道輪２に固定する。 The retaining ring 6 is fitted in the retaining ring groove 9 so as to be interposed between the peripheral edge portion 7 of the protective member 5 and the tapered surface 10 in a state where the diameter of the retaining ring 6 is reduced from the natural state. The retaining ring 6 fitted in the retaining ring groove 9 fixes the protective member 5 to the bearing ring 2 in a state where the peripheral edge portion 7 is fitted to the fitting portion 8 of the bearing ring 2.
　その溝底部１２と止め輪６との間に、径方向の隙間１３が設定されている。隙間１３は、止め輪６がテーパ面１０及び周縁部７の軸方向外側の側面と接触しているときに、止め輪６の弾性反発を許容し、テーパ面１０が軸方向の分力を生み出すようにするための空間である。 A radial gap 13 is set between the groove bottom 12 and the retaining ring 6. The clearance 13 allows elastic repulsion of the retaining ring 6 when the retaining ring 6 is in contact with the tapered surface 10 and the axially outer side surface of the peripheral edge portion 7, and the tapered surface 10 generates an axial component force. It is a space for doing so.
　止め輪６は、矩形状の断面をもち、その断面矩形状の対角の位置に、テーパ面１０に接触させる縁部１４と、周縁部７の軸方向外側の側面に接触させる縁部１５とを有する。止め輪６は、テーパ面１０に接触させる縁部１４回りに保護部材５の周縁部７側へ反った形状に予め形成されている。ここで、図２に示す止め輪６は、図中右側の止め輪溝９に嵌着されるものなので、縁部１４を中心とした時計回りの方向の反りを止め輪６の全体に予めもたせた形状となっている。一方、図１中左側の止め輪６は、逆に反時計回りの反りを止め輪６の全体に予めもたせた形状となっている。止め輪６に予めもたせた反りは、図２に示すように、止め輪溝９に嵌着された状態でも消失せず、周縁部７の軸方向外側の側面とテーパ面１０との間で軸方向のスプリング作用を奏する。 The retaining ring 6 has a rectangular cross section, and at the diagonal position of the rectangular cross section, an edge portion 14 that is in contact with the tapered surface 10 and an edge portion 15 that is in contact with the side surface on the outer side in the axial direction of the peripheral edge portion 7. Have The retaining ring 6 is formed in advance in a shape that warps toward the peripheral edge 7 of the protective member 5 around the edge 14 that is brought into contact with the tapered surface 10. Here, since the retaining ring 6 shown in FIG. 2 is fitted in the retaining ring groove 9 on the right side in the figure, the entire retaining ring 6 is warped in the clockwise direction around the edge portion 14 in advance. It has a different shape. On the other hand, the retaining ring 6 on the left side in FIG. 1 has a shape in which counterclockwise warping is provided over the entire retaining ring 6 in advance. As shown in FIG. 2, the warp preliminarily applied to the retaining ring 6 does not disappear even when fitted in the retaining ring groove 9, and the shaft is between the axially outer side surface of the peripheral edge portion 7 and the tapered surface 10. Has a spring action in the direction.
　図３に示すように、止め輪６は、止め輪溝９に嵌着する当該止め輪６の向きを示す目印部１６を有する。目印部１６は、止め輪６の周方向の両端部を互いに異形にすることによって設けられている。この目印部１６は、径方向に対して傾斜したテーパ状の端面を有する。軸受外部に位置する作業者の視線で考えると、目印部１６が図中右方に位置するような止め輪６の向きのとき、テーパ面１０に縁部１４を接触させることの可能な正規の止め輪６の向きにあることを示す。 As shown in FIG. 3, the retaining ring 6 has a mark portion 16 indicating the direction of the retaining ring 6 fitted in the retaining ring groove 9. The mark part 16 is provided by making the both ends of the circumferential direction of the retaining ring 6 into a different shape. The mark portion 16 has a tapered end face inclined with respect to the radial direction. Considering the line of sight of an operator located outside the bearing, when the retaining ring 6 is oriented so that the mark portion 16 is located on the right side in the figure, the regular portion 14 can be brought into contact with the tapered surface 10. The direction of the retaining ring 6 is indicated.
　第一実施形態に係る転がり軸受は、上述のようなものであり、止め輪溝９のテーパ面１０に接触させる止め輪６の縁部１４回りに保護部材の周縁部側へ予め反った形状に予め形成されている止め輪６を採用しているので、そのように止め輪６を嵌着すると、前述の反りを予めもっている止め輪６は、保護部材５の周縁部７を軌道輪２の嵌合部８へ軸方向に押し付けるスプリング作用を奏する。このスプリング作用により、止め輪６と保護部材５間、保護部材５と軌道輪２の嵌合部８間の摩擦が向上させられ、また、衝撃等で止め輪６がテーパ面１０に沿うように反った不正な姿勢になることが防止される。したがって、この転がり軸受は、軌道輪２に対する環状の保護部材５の固定不良を止め輪６自体の工夫で防止することができる。 The rolling bearing according to the first embodiment is as described above, and has a shape that warps in advance to the peripheral edge side of the protective member around the edge 14 of the retaining ring 6 that contacts the tapered surface 10 of the retaining ring groove 9. Since the retaining ring 6 formed in advance is adopted, when the retaining ring 6 is fitted in such a manner, the retaining ring 6 having the above-described warpage is connected to the peripheral portion 7 of the protection member 5 with respect to the raceway ring 2. There is a spring action of pressing the fitting portion 8 in the axial direction. This spring action improves the friction between the retaining ring 6 and the protective member 5 and between the protective member 5 and the fitting portion 8 of the raceway ring 2 so that the retaining ring 6 follows the tapered surface 10 due to impact or the like. It is possible to prevent a warped and incorrect posture. Therefore, this rolling bearing can prevent improper fixing of the annular protective member 5 to the raceway ring 2 by devising the retaining ring 6 itself.
　また、この転がり軸受は、止め輪溝９に嵌着する当該止め輪６の向きを示す目印部１６を有するので、止め輪６の嵌着を行う作業者に前述のスプリング作用を奏する止め輪６の向きを知らせて嵌着不良を防止することができる。 Further, since this rolling bearing has a mark portion 16 indicating the direction of the retaining ring 6 fitted in the retaining ring groove 9, the retaining ring 6 that exerts the above-described spring action on an operator who fits the retaining ring 6. It is possible to prevent the poor fitting by informing the direction.
　第二実施形態を図４に示す。なお、以下では、第一実施形態との相違点を述べるに留める。図４に示す第二実施形態は、目印部２０を第一実施形態から変更したものである。すなわち、その目印部２０は、止め輪の一方の端部にのみ形成された貫通孔部からなる。軸受外部に位置する作業者の視線で考えると、目印部２０が図中左方に位置するような止め輪の向きのとき、正規の止め輪の向きにあることを示す。 The second embodiment is shown in FIG. In the following, only differences from the first embodiment will be described. In the second embodiment shown in FIG. 4, the mark portion 20 is changed from the first embodiment. That is, the mark part 20 consists of a through-hole part formed only at one end part of the retaining ring. Considering the line of sight of an operator located outside the bearing, when the mark portion 20 is in the direction of the retaining ring located on the left side in the drawing, it indicates that the direction is the normal retaining ring.
　第三実施形態を図５に示す。第三実施形態は、目印部３０を第一実施形態から変更したものである。すなわち、その目印部３０は、軸方向外側に向けるべき側面３１の一方の端部にのみ形成された一本以上の溝筋部からなる。図示例の目印部３０は、視認性を良好にするため、平行な多数本の溝筋部になっている。軸受外部に位置する作業者の視線で考えると、目印部３０が図中左方に位置するような止め輪の向きのとき、正規の止め輪の向きにあることを示す。 FIG. 5 shows a third embodiment. In the third embodiment, the mark portion 30 is changed from the first embodiment. That is, the mark portion 30 is composed of one or more groove streaks formed only at one end portion of the side surface 31 to be directed outward in the axial direction. The mark portion 30 in the illustrated example is a plurality of parallel groove portions in order to improve visibility. Considering the line of sight of an operator located outside the bearing, when the mark portion 30 is in the direction of the retaining ring located on the left side in the drawing, it indicates that it is in the normal retaining ring direction.
　第四実施形態を図６Ａ、図６Ｂに示す。第四実施形態は、目印部４０の態様を第一実施形態から変更したものである。その目印部４０は、止め輪の両側面を互いに異色とすることによって設けられている。図示例の目印部４０は、着色された止め輪の軸方向外側の側面からなる。軸方向内側に向けるべき側面４１は、止め輪の断面矩形状を形成する金属材料の表面からなる。目印部４０は、その金属材料の表面と明瞭に異なる色の塗膜になっている。軸受外部に位置する作業者の視線で考えると、目印部４０が作業者に面するような止め輪の向きのとき、正規の止め輪の向きにあることを示す。 The fourth embodiment is shown in FIGS. 6A and 6B. 4th embodiment changes the aspect of the mark part 40 from 1st embodiment. The mark portion 40 is provided by making the both side surfaces of the retaining ring different from each other. The mark part 40 of the example of illustration consists of the side surface of the axial direction outer side of the colored retaining ring. The side surface 41 to be directed inward in the axial direction is made of a surface of a metal material that forms a rectangular cross section of the retaining ring. The mark portion 40 is a coating film having a color that is clearly different from the surface of the metal material. Considering the line of sight of the worker located outside the bearing, when the mark portion 40 is in the direction of the retaining ring facing the worker, it indicates that it is in the normal retaining ring direction.
　第五実施形態を図７に示す。第五実施形態に係る止め輪５０は、テーパ面１０に接触させる縁部５１及び保護部材５の周縁部７に接触させる縁部５２が、その接触相手であるテーパ面１０又は周縁部７の軸方向外側の側面に沿った形状になっている。このようにすると、縁部５１とテーパ面１０の接触面積、縁部５２と周縁部７の接触面積は、それぞれ第一実施形態よりも拡大する。このため、第五実施形態は、保護部材５を軌道輪２により強固に固定することができる。なお、図示例は、縁部５１，５２の両方を接触相手に沿った形状にしたが、求める固定強度に応じて縁部５１，５２の一方のみを接触相手に沿った形状にしてもよい。 FIG. 7 shows the fifth embodiment. In the retaining ring 50 according to the fifth embodiment, the edge 51 to be brought into contact with the tapered surface 10 and the edge 52 to be brought into contact with the peripheral edge 7 of the protection member 5 are the axes of the tapered surface 10 or the peripheral portion 7 that are contact partners. It has a shape along the side surface on the outside in the direction. If it does in this way, the contact area of the edge part 51 and the taper surface 10 and the contact area of the edge part 52 and the peripheral part 7 will each expand rather than 1st embodiment. For this reason, in the fifth embodiment, the protection member 5 can be firmly fixed to the track ring 2. In the illustrated example, both the edges 51 and 52 are shaped along the contact partner, but only one of the edges 51 and 52 may be shaped along the contact partner depending on the required fixing strength.
　また、軸受外部に位置する作業者の視線で考えると、テーパ面状の縁部５１が目印部を兼ねることになる。すなわち、縁部５１が外径側に位置するような止め輪の向きのとき、正規の止め輪の向きにあることを示す。 Also, when considering from the line of sight of an operator located outside the bearing, the tapered edge 51 also serves as a mark. That is, when the retaining ring is oriented such that the edge 51 is located on the outer diameter side, it indicates that the edge 51 is in the proper retaining ring orientation.
　第六実施形態を図８に示す。第六実施形態は、上述の第二の発明に対応するものである。図８に示すように、第六実施形態に係る止め輪６０は、止め輪６０に予め反りをもたせておらず、その止め輪６０のうち、少なくともテーパ面１０との接触部及び保護部材５の周縁部７との接触部に、滑り止め６１，６２を有する点で第一実施形態と相違している。 FIG. 8 shows the sixth embodiment. The sixth embodiment corresponds to the second invention described above. As shown in FIG. 8, the retaining ring 60 according to the sixth embodiment does not warp the retaining ring 60 in advance, and at least the contact portion with the tapered surface 10 and the protective member 5 of the retaining ring 60. The first embodiment is different from the first embodiment in that the contact portions with the peripheral edge portion 7 have anti-slip members 61 and 62.
　滑り止め６１，６２は、止め輪６０の断面矩形状を形成する金属材料の表面に対して静止摩擦係数を大きくさせた表面部からなり、接触相手のテーパ面１０、周縁部７の軸方向外側の側面に対して止め輪６０が径方向にずれ動くことを抑える。 The slip stoppers 61 and 62 are formed of a surface portion having a static friction coefficient increased with respect to the surface of the metal material forming the rectangular cross section of the retaining ring 60, and are axially outer sides of the tapered surface 10 of the contact partner and the peripheral edge portion 7. The retaining ring 60 is prevented from shifting in the radial direction with respect to the side surface.
　滑り止め６１，６２は、止め輪６０の断面矩形状を形成する金属材料の表面に付着させられた弾性材料からなる。その弾性材料として、例えば、ゴムが挙げられる。図示例では、滑り止め６１，６２を簡単に付着させるため、止め輪６０の外径を跨ぐように一連に設けたが、別々に分離された態様で設けてもよい。 The slip stoppers 61 and 62 are made of an elastic material attached to the surface of a metal material that forms a rectangular cross section of the retaining ring 60. Examples of the elastic material include rubber. In the illustrated example, the slip stoppers 61 and 62 are provided in series so as to straddle the outer diameter of the retaining ring 60 in order to easily attach them. However, they may be provided separately.
　第六実施形態は、止め輪６０のうち、少なくともテーパ面１０との接触部及び保護部材５の周縁部７との接触部に滑り止め６１，６２が施されているので、振動や衝撃で止め輪６０が止め輪溝９へ深く入り込むようにずれ動きにくくなる。このため、止め輪６０がテーパ面１０に沿うように反った不正な姿勢になることが防止される。したがって、第六実施形態は、軌道輪２に対する環状の保護部材５の固定不良を止め輪６０自体の工夫で防止することができる。 In the sixth embodiment, at least the contact portion with the tapered surface 10 and the contact portion with the peripheral portion 7 of the protective member 5 are provided with the slip stoppers 61 and 62 in the retaining ring 60. The ring 60 becomes difficult to move so as to enter the retaining ring groove 9 deeply. For this reason, it is possible to prevent the retaining ring 60 from taking an illegal posture along the tapered surface 10. Therefore, the sixth embodiment can prevent improper fixing of the annular protection member 5 to the raceway ring 2 by devising the retaining ring 60 itself.
　第七実施形態を図９Ａ、図９Ｂに示す。第七実施形態は、第六実施形態からさらに変更したものである。第七実施形態に係る止め輪７０では、テーパ面１０との接触部にある滑り止め７１、周縁部７との接触部にある滑り止め７１，７２が、それぞれ止め輪７０の断面矩形状を形成する金属材料の表面に形成された多数の溝筋部からなる。これら滑り止め７１，７２は、軸方向及び径方向に対して傾斜した二方向の溝筋部が交差する綾目ローレット加工によって形成されている。なお、滑り止め７１，７２は、止め輪７０の両側面全体に形成されているが、少なくともテーパ面１０との接触部及び保護部材５の周縁部７との接触部にあればよい。 The seventh embodiment is shown in FIGS. 9A and 9B. The seventh embodiment is a further modification of the sixth embodiment. In the retaining ring 70 according to the seventh embodiment, the slip stopper 71 at the contact portion with the tapered surface 10 and the slip stoppers 71 and 72 at the contact portion with the peripheral edge portion 7 each form a rectangular cross section of the retaining ring 70. It consists of a large number of groove streaks formed on the surface of the metal material. These slip stoppers 71 and 72 are formed by a twill knurling process in which two grooving portions that are inclined with respect to the axial direction and the radial direction intersect. The slip stoppers 71 and 72 are formed on the entire both side surfaces of the retaining ring 70, but may be at least at the contact portion with the tapered surface 10 and the contact portion with the peripheral portion 7 of the protection member 5.
　今回開示された実施形態はすべての点で例示であって制限的なものではないと考えられるべきである。例えば、第一の発明と第二の発明を併用することも可能であり、この場合、第二の発明に対応の第六実施形態や第七実施形態において第一の実施形態のような反りを予めもたせた止め輪にすればよいだけのことである。また、上述の各実施形態では、外方の軌道輪に止め輪を装着する例を示したが、内方の軌道輪の外周に止め輪を装着する場合も同様に第一の発明や第二の発明を適用することが可能である。このように、本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. For example, it is also possible to use the first invention and the second invention in combination. In this case, in the sixth embodiment and the seventh embodiment corresponding to the second invention, the warp as in the first embodiment is performed. All you have to do is use a pre-set retaining ring. Further, in each of the above-described embodiments, the example in which the retaining ring is attached to the outer race ring has been shown. However, when the retaining ring is attached to the outer periphery of the inner race ring, the first invention and the second invention are similarly applied. It is possible to apply this invention. Thus, the scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.
１，２　軌道輪
５　保護部材
６，５０，６０，７０　止め輪
７　周縁部
８　嵌合部
９　止め輪溝
１０　テーパ面
１２　溝底部
１３　隙間
１４，１５，５１，５２　縁部
１６，２０，３０，４０　目印部
６１，６２，７１，７２　滑り止め 1, 2, raceway 5 Protective member 6, 50, 60, 70 Snap ring 7 Peripheral part 8 Fitting part 9 Snap ring groove 10 Tapered surface 12 Groove bottom part 13 Clearance 14, 15, 51, 52 Edge part 16, 20, 30 , 40 Marking part 61, 62, 71, 72 Non-slip

Claims (4)

  1. 　軌道輪と、前記軌道輪に軸方向から嵌合可能な周縁部を有する保護部材と、前記軌道輪に嵌合された前記保護部材を前記軌道輪に固定する止め輪とを備え、
    　前記軌道輪が、前記保護部材の周縁部を径方向及び軌道面側から受ける段差状の嵌合部と、前記止め輪を嵌着可能な止め輪溝とを有し、
    　前記止め輪溝を形成する溝内面のうち、前記止め輪を軸方向外側から受ける部分が、溝底に近くなる程に溝幅を狭くするように傾斜したテーパ面になっており、
    　前記溝内面の溝底部と前記止め輪との間に、径方向の隙間が設定されている転がり軸受において、
    　前記止め輪が、前記テーパ面に接触させる当該止め輪の縁部回りに前記保護部材の周縁部側へ反った形状に予め形成されていることを特徴とする転がり軸受。     A bearing ring, a protection member having a peripheral edge that can be fitted to the race ring from the axial direction, and a retaining ring that fixes the protection member fitted to the race ring to the race ring,
    The track ring has a stepped fitting portion that receives the peripheral portion of the protection member from the radial direction and the track surface side, and a retaining ring groove into which the retaining ring can be fitted,
    Of the groove inner surface forming the retaining ring groove, the portion that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width toward the groove bottom,
    In a rolling bearing in which a radial gap is set between the groove bottom of the groove inner surface and the retaining ring,
    The rolling bearing according to claim 1, wherein the retaining ring is formed in advance in a shape that warps toward a peripheral edge side of the protective member around an edge of the retaining ring that is brought into contact with the tapered surface.
  2. 　前記止め輪のうち、前記テーパ面に接触させる縁部及び前記保護部材の周縁部に接触させる縁部のうち、少なくとも一方の縁部が、その接触相手であるテーパ面又は周縁部に沿った形状になっている請求項１に記載の転がり軸受。 Of the retaining ring, at least one edge of the edge to be brought into contact with the tapered surface and the edge to be brought into contact with the peripheral edge of the protective member is shaped along the tapered surface or the peripheral edge which is a contact partner. The rolling bearing according to claim 1, wherein
  3. 　前記止め輪が、前記止め輪溝に嵌着する当該止め輪の向きを示す目印部を有する請求項１又は２に記載の転がり軸受。 The rolling bearing according to claim 1 or 2, wherein the retaining ring has a mark portion indicating a direction of the retaining ring that fits into the retaining ring groove.
  4. 　軌道輪と、前記軌道輪に軸方向から嵌合可能な周縁部を有する保護部材と、前記軌道輪に嵌合された前記保護部材を前記軌道輪に固定する止め輪とを備え、
    　前記軌道輪が、前記保護部材の周縁部を径方向及び軌道面側から受ける段差状の嵌合部と、前記止め輪を嵌着可能な止め輪溝とを有し、
    　前記止め輪溝を形成する溝内面のうち、前記止め輪を軸方向外側から受ける部分が、溝底に近くなる程に溝幅を狭くするように傾斜したテーパ面になっており、
    　前記溝内面の溝底部と前記止め輪との間に、径方向の隙間が設定されている転がり軸受において、
    　前記止め輪のうち、少なくとも前記テーパ面との接触部及び前記保護部材の周縁部との接触部に、滑り止めを有することを特徴とする転がり軸受。     A bearing ring, a protection member having a peripheral edge that can be fitted to the race ring from the axial direction, and a retaining ring that fixes the protection member fitted to the race ring to the race ring,
    The track ring has a stepped fitting portion that receives the peripheral portion of the protection member from the radial direction and the track surface side, and a retaining ring groove into which the retaining ring can be fitted,
    Of the groove inner surface forming the retaining ring groove, the portion that receives the retaining ring from the outside in the axial direction is a tapered surface that is inclined so as to narrow the groove width toward the groove bottom,
    In a rolling bearing in which a radial gap is set between the groove bottom of the groove inner surface and the retaining ring,
    A rolling bearing having a slip stopper at least in a contact portion with the tapered surface and a contact portion with a peripheral portion of the protective member among the retaining rings.
PCT/JP2016/078038 2015-09-24 2016-09-23 Anti-friction bearing WO2017051880A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017213042A1 (en) * 2016-06-08 2017-12-14 Ntn株式会社 Rolling bearing
CN110094426A (en) * 2018-01-30 2019-08-06 舍弗勒技术股份两合公司 Single-row rolling bearing
US20230003258A1 (en) * 2021-06-30 2023-01-05 Aktiebolaget Skf Bearing unit with optimized anchoring of the sealing device
US20230046260A1 (en) * 2019-12-27 2023-02-16 Nsk Ltd. Rolling bearing for air turbine

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CN113898668B (en) * 2021-11-19 2024-04-26 洛阳轴承集团股份有限公司 Sealed aligning roller bearing

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JPS5624233A (en) * 1979-05-21 1981-03-07 Waldes Kohinoor Inc Spring holding ring
JP2002310120A (en) * 2001-04-09 2002-10-23 Nsk Ltd Retaining ring and rolling bearing using this ring
JP2006112532A (en) * 2004-10-15 2006-04-27 Ntn Corp Bearing for wheel
WO2014021313A1 (en) * 2012-07-30 2014-02-06 日本発條株式会社 Affixation structure and affixation method
WO2014168543A1 (en) * 2013-04-08 2014-10-16 Aktiebolaget Skf Large sealed self aligning rolling bearing with improved sealing

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JPS4426331Y1 (en) * 1965-02-06 1969-11-05
JPS5624233A (en) * 1979-05-21 1981-03-07 Waldes Kohinoor Inc Spring holding ring
JP2002310120A (en) * 2001-04-09 2002-10-23 Nsk Ltd Retaining ring and rolling bearing using this ring
JP2006112532A (en) * 2004-10-15 2006-04-27 Ntn Corp Bearing for wheel
WO2014021313A1 (en) * 2012-07-30 2014-02-06 日本発條株式会社 Affixation structure and affixation method
WO2014168543A1 (en) * 2013-04-08 2014-10-16 Aktiebolaget Skf Large sealed self aligning rolling bearing with improved sealing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017213042A1 (en) * 2016-06-08 2017-12-14 Ntn株式会社 Rolling bearing
CN110094426A (en) * 2018-01-30 2019-08-06 舍弗勒技术股份两合公司 Single-row rolling bearing
US20230046260A1 (en) * 2019-12-27 2023-02-16 Nsk Ltd. Rolling bearing for air turbine
US11965557B2 (en) * 2019-12-27 2024-04-23 Nsk Ltd. Rolling bearing for air turbine
US20230003258A1 (en) * 2021-06-30 2023-01-05 Aktiebolaget Skf Bearing unit with optimized anchoring of the sealing device
US11808298B2 (en) * 2021-06-30 2023-11-07 Aktiebolaget Skf Bearing unit with optimized anchoring of the sealing device

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