JP6079084B2 - Roller bearing - Google Patents

Roller bearing Download PDF

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JP6079084B2
JP6079084B2 JP2012205462A JP2012205462A JP6079084B2 JP 6079084 B2 JP6079084 B2 JP 6079084B2 JP 2012205462 A JP2012205462 A JP 2012205462A JP 2012205462 A JP2012205462 A JP 2012205462A JP 6079084 B2 JP6079084 B2 JP 6079084B2
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pin
elastic member
hollow
roller
hollow roller
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JP2014059033A (en
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信行 石橋
信行 石橋
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JTEKT Corp
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JTEKT Corp
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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
    • 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
    • F16C19/36—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 a single row of rollers
    • F16C19/364—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 a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/52—Cages for rollers or needles with no part entering between, or touching, the bearing surfaces of the rollers
    • F16C33/523—Cages for rollers or needles with no part entering between, or touching, the bearing surfaces of the rollers with pins extending into holes or bores on the axis of the rollers
    • F16C33/526—Cages for rollers or needles with no part entering between, or touching, the bearing surfaces of the rollers with pins extending into holes or bores on the axis of the rollers extending through the rollers and joining two lateral cage parts
    • 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)
  • Rolling Contact Bearings (AREA)

Description

本発明は、ピンタイプ保持器が使用されるころ軸受に関する。   The present invention relates to a roller bearing in which a pin type cage is used.

従来、ピンタイプ保持器としては、特許文献１に記載されているものがある。   Conventionally, as a pin type retainer, there is one described in Patent Document 1.

円すいころ軸受は、内輪と、その内輪の外側に配置された外輪と、内輪と外輪との間に転動自在に配された複数の中空ころと、各中空ころを円周方向等間隔に保持するピンタイプ保持器とで構成されている。このピンタイプ保持器は、第１環状側板と、第２環状側板と、第１環状側板および第２環状側板を連結する複数のピンとを備え、前記複数のピンは、第１環状側板の周方向に間隔をおいて配置されている。前記各ピンを中空ころのピン穴に挿入することにより、ピンに中空ころが回転自在に支持されている。   Tapered roller bearings have an inner ring, an outer ring arranged outside the inner ring, a plurality of hollow rollers arranged so as to be able to roll between the inner ring and the outer ring, and holding the hollow rollers at equal intervals in the circumferential direction. It consists of a pin type cage. The pin type retainer includes a first annular side plate, a second annular side plate, and a plurality of pins connecting the first annular side plate and the second annular side plate, and the plurality of pins are arranged in the circumferential direction of the first annular side plate. Are arranged at intervals. By inserting each pin into the pin hole of the hollow roller, the hollow roller is rotatably supported by the pin.

前記ピンに対して中空ころはすきまを持って、回転自在に支持されている。特許文献２では、中空ころとピンの摩擦を低減するため、ピンに表面処理したり潤滑のための円周溝を設けたものがある。
また、特許文献３では、側板内周面とピンの外周面に環状凹部を設け、該環状凹部にブッシュ配置により、側板とピンとの係合強度を持たしたものが開示されている。 The hollow roller is supported rotatably with a clearance with respect to the pin. In Patent Document 2, there is one in which a circumferential groove for lubrication or lubrication is provided on the pin in order to reduce friction between the hollow roller and the pin.
Japanese Patent Application Laid-Open No. H10-228707 discloses an annular recess provided on the inner peripheral surface of the side plate and the outer peripheral surface of the pin, and the annular recess having a bushing arrangement to provide engagement strength between the side plate and the pin.

特開２００３−３４３５７４号公報JP 2003-343574 A 特開２０１１−７２８１号公報JP 2011-7281 A 特開２００９−２９９８３７号公報JP 2009-299837 A

前記従来のピンタイプ保持器によると、軸受の回転による中空ころの内周部とピンの外周部の摩擦低減の取り組みはあるが、中空ころの落下による打音防止の取り組みはない。詳細に説明すると、ピンタイプ保持器を使用したころ軸受において、内外輪の相対回転により中空ころが負荷圏から解放されたときに内外輪のラジアルすきまと、中空ころの内周部とピンの外周部にすきまが同時に発生する時、中空ころが自由落下してピンや内外輪の軌道との打音やピンや内外輪の軌道の損傷が発生する場合があった。そこで、本発明の課題は、中空ころとピンとのすきまによる打音や軌道の損傷を防止できるピンタイプ保持器のころ軸受を提供することにある。   According to the conventional pin type cage, there is an effort to reduce the friction between the inner peripheral portion of the hollow roller and the outer peripheral portion of the pin by rotating the bearing, but there is no attempt to prevent the hitting sound due to the fall of the hollow roller. In detail, in roller bearings using pin type cages, when the hollow rollers are released from the load zone by the relative rotation of the inner and outer rings, the radial clearance of the inner and outer rings, the inner periphery of the hollow rollers, and the outer periphery of the pin When the clearance is generated at the same time, the hollow roller may fall freely and hit the pin or inner / outer ring raceway or damage the pin or inner / outer raceway. SUMMARY OF THE INVENTION An object of the present invention is to provide a roller bearing for a pin type cage that can prevent hammering noise and raceway damage due to a clearance between a hollow roller and a pin.

前記課題を解決するため、請求項１に記載の発明は、外輪と、内輪と、前記外輪および前記内輪の間を転動しピン穴を有する複数の中空ころと、前記複数の中空ころを回転可能に支持する保持器とを備え、前記保持器は、第１環状側板と、第２環状側板と、前記第１環状側板および前記第２環状側板を連結する複数のピンとを有し、前記ピンを前記中空ころのピン穴に挿入することにより、前記ピンに前記中空ころが回転自在に支持されているころ軸受において、前記中空ころのピン穴および前記ピンの外周間に弾性部材を介挿し、この弾性部材によって前記中空ころを前記ピンに対して径方向に弾性支持したことを要旨としている。   In order to solve the above-mentioned problem, the invention according to claim 1 is directed to an outer ring, an inner ring, a plurality of hollow rollers rolling between the outer ring and the inner ring and having pin holes, and rotating the plurality of hollow rollers. A cage that supports the first annular side plate, a second annular side plate, and a plurality of pins that connect the first annular side plate and the second annular side plate; In the roller bearing in which the hollow roller is rotatably supported by the pin, an elastic member is inserted between the pin hole of the hollow roller and the outer periphery of the pin, The gist is that the hollow roller is elastically supported by the elastic member in the radial direction with respect to the pin.

本発明によれば、内外輪のラジアルすきまと、中空ころの内周部とピンの外周部にすきまが同時に発生する場合に、弾性部材により、ピンに対して中空ころが弾性支持されているため、中空ころとピンとのすきまにおける自由な移動を規制して、中空ころが自由落下しないため、ピンや内外輪の軌道との打音やピンや内外輪の軌道の損傷を防止したころ軸受を提供できる。   According to the present invention, when the radial clearance between the inner and outer rings and the clearance between the inner peripheral portion of the hollow roller and the outer peripheral portion of the pin are generated simultaneously, the hollow roller is elastically supported by the elastic member with respect to the pin. Roller bearings that restrict free movement in the clearance between the hollow roller and the pin and prevent the hollow roller from free-falling, thus preventing hitting with the pin and inner / outer ring raceway and damage to the pin and inner / outer ring raceway it can.

さらに、請求項１に記載の発明は、前記弾性部材は、前記ピン穴に接触する外径側係止部と、前記ピンに接触する内径側係止部とを有し、前記外径側係止部および前記内径側係止部は、互いに軸方向に離間して径方向に離間してこの間に弾性力を有することを要旨としている。そのため、外径側係止部および内径側係止部間の弾性力を有する部分の長さを大きくとることができ、この長さの製造上のばらつきがあっても弾性力が大きく変化することが無い利点がある。また、中空ころのピン穴および前記ピンの外周間の非常に狭い空間で弾性力を発生できる利点がある。しかも、中空ころとピンとのすきまにおける自由な移動を規制して、打音や損傷の発生を防止したころ軸受を提供できる。
Furthermore, the invention described in claim 1 is characterized in that the elastic member has an outer diameter side locking portion that contacts the pin hole and an inner diameter side locking portion that contacts the pin. The gist is that the stop portion and the inner diameter side locking portion are separated from each other in the axial direction and separated in the radial direction and have an elastic force therebetween. Therefore, it is possible to increase the length of the portion having the elastic force between the outer diameter side locking portion and the inner diameter side locking portion, and the elastic force changes greatly even if there is a manufacturing variation of this length. There is no advantage. Further, there is an advantage that elastic force can be generated in a very narrow space between the pin hole of the hollow roller and the outer periphery of the pin. In addition, it is possible to provide a roller bearing that restricts free movement in the clearance between the hollow roller and the pin and prevents occurrence of hitting sound and damage.

また、請求項２に記載の発明は、前記弾性部材は、前記外径側係止部が軸方向中央にあり、前記内径側係止部が両端にある樽状コイルばねであることを要旨としている。そのため、弾性部材の構造が簡単で安価となり、中空ころのピン穴および前記ピンの外周間の非常に狭い空間で弾性力を発生できる利点がある。しかも、中空ころとピンとのすきまにおける自由な移動を規制して、打音や損傷の発生を防止したころ軸受を提供できる。
The gist of the invention according to claim 2 is that the elastic member is a barrel-shaped coil spring in which the outer diameter side locking portion is in the center in the axial direction and the inner diameter side locking portion is at both ends. Yes. Therefore, the structure of the elastic member is simple and inexpensive, and there is an advantage that an elastic force can be generated in a very narrow space between the pin hole of the hollow roller and the outer periphery of the pin. In addition, it is possible to provide a roller bearing that restricts free movement in the clearance between the hollow roller and the pin and prevents occurrence of hitting sound and damage.

さらに、請求項３に記載の発明は、前記中空ころのピン穴の内周およびピンの外周の少なくとも一方に環状溝および接触面を互いに軸方向にずらして形成し、前記中空ころのピン穴の内周およびピンの外周の少なくとも他方と、前記環状溝との間に弾性部材を介挿し、前記弾性部材を径方向に偏心移動させ、径方向に変形させたときに、前記中空ころのピン穴の内周およびピンの外周の少なくとも一方と、前記接触面とが接触することを要旨としている。そのため、中空ころに大きな力が作用した場合に、中空ころがピンと接触することで、保持器を介して他の中空ころに前記大きな力を伝えることができる。中空ころに大きな力が作用しないときは、中空ころとピンとのすきまにおける自由な移動を規制して、打音や損傷の発生を防止したころ軸受を提供できる。
Furthermore, the invention according to claim 3 is characterized in that at least one of the inner periphery of the pin hole of the hollow roller and the outer periphery of the pin is formed by shifting the annular groove and the contact surface in the axial direction relative to each other. When an elastic member is inserted between at least the other of the inner periphery and the outer periphery of the pin and the annular groove, the elastic member is moved eccentrically in the radial direction and deformed in the radial direction. The gist is that at least one of the inner periphery and the outer periphery of the pin is in contact with the contact surface. Therefore, when a large force acts on the hollow rollers, the hollow rollers come into contact with the pins, so that the large force can be transmitted to the other hollow rollers via the cage. When a large force does not act on the hollow roller, it is possible to provide a roller bearing that restricts free movement in the clearance between the hollow roller and the pin and prevents occurrence of hitting sound and damage.

本発明のピンタイプ保持器によれば、中空ころの弾性支持によって、中空ころとピンとのすきまにおける自由な移動を規制できるため、打音や軌道の損傷を防止したころ軸受を提供できる。
弾性部材は、ピン穴に接触する外径側係止部と、ピンに接触する内径側係止部とを有し、外径側係止部および内径側係止部は、互いに軸方向に離間して径方向に離間してこの間に弾性力を有することによって、外径側係止部および内径側係止部間の弾性力を有する部分の長さを大きくとることができ、この長さの製造上のばらつきがあっても弾性力が大きく変化することが無い利点がある。また、中空ころのピン穴および前記ピンの外周間の非常に狭い空間で弾性力を発生できる利点がある。
According to the pin type cage of the present invention, since elastic movement of the hollow roller can restrict free movement in the clearance between the hollow roller and the pin, it is possible to provide a roller bearing that prevents the hitting sound and the raceway from being damaged.
The elastic member has an outer diameter side locking portion that contacts the pin hole and an inner diameter side locking portion that contacts the pin, and the outer diameter side locking portion and the inner diameter side locking portion are separated from each other in the axial direction. Thus, by separating in the radial direction and having an elastic force therebetween, the length of the portion having the elastic force between the outer diameter side locking portion and the inner diameter side locking portion can be increased. There is an advantage that the elastic force does not change greatly even if there are variations in manufacturing. Further, there is an advantage that elastic force can be generated in a very narrow space between the pin hole of the hollow roller and the outer periphery of the pin.

本発明の第１実施形態のころ軸受の円周方向断面図FIG. 1 is a circumferential sectional view of a roller bearing according to a first embodiment of the present invention. 第１実施形態のピンタイプ保持器ところの円周方向断面図Circumferential sectional view of the pin type cage of the first embodiment 第２実施形態のピンタイプ保持器ところの円周方向断面図Circumferential sectional view of the pin type cage of the second embodiment

以下、本発明を図示の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the drawings.

図１は、本発明の第１実施形態のころ軸受の円周方向断面図を示し、図２は第１実施形態のピンタイプ保持器ところの円周方向断面図を示す。
この第一の実施形態のころ軸受は、外径面に内側転走面７ａが形成された内輪７と、その内輪７の外側に配置され、内径面に外側転走面６ａが形成された外輪６と、内輪７と外輪６との間に転動自在に配された複数の中空ころ４と、各中空ころ４を円周方向等間隔に保持するピンタイプ保持器８とで構成されている。 FIG. 1 shows a circumferential sectional view of a roller bearing according to a first embodiment of the present invention, and FIG. 2 shows a circumferential sectional view of a pin type cage according to the first embodiment.
The roller bearing according to the first embodiment includes an inner ring 7 having an inner rolling surface 7a formed on the outer diameter surface, and an outer ring disposed outside the inner ring 7 and having an outer rolling surface 6a formed on the inner diameter surface. 6, a plurality of hollow rollers 4 that are rotatably arranged between the inner ring 7 and the outer ring 6, and a pin type retainer 8 that holds the hollow rollers 4 at equal intervals in the circumferential direction. .

各中空ころ４は、その軸中心に貫通孔４ａが形成されている。また、ピンタイプ保持器８は、各中空ころ４を挟んで対向する一対の環状側板１，２と、各中空ころ４の貫通孔４ａに挿通されて中空ころ４を転動自在に支持するピン３とで構成されている。ピン３の一端部３aはねじで大径側の側板１のねじ部１aに固定され、その他端部３ｂは図略のブッシュの嵌め込みによって小径側の側板２の穴２aに圧入固定されている。   Each hollow roller 4 has a through hole 4a at the center of the shaft. The pin type retainer 8 is a pin that is inserted into the pair of annular side plates 1 and 2 facing each other with the hollow rollers 4 interposed therebetween and the through-hole 4a of each hollow roller 4 and supports the hollow rollers 4 in a rollable manner. 3. One end portion 3a of the pin 3 is fixed to the screw portion 1a of the large-diameter side plate 1 by a screw, and the other end portion 3b is press-fitted and fixed to the hole 2a of the small-diameter side plate 2 by fitting a bush (not shown).

前記中空ころ４のピン穴４aと前記ピン３の外周面３e間に弾性部材５が介挿されている。前記弾性部材５は、係止部５a、５ｂ、５ｃを有し、前記係止部５aは、樽状に径方向に広がって、弾性部材５の内周面５ｂ、５ｃはピン３の両端部の外周面３ｃ、３ｄと接し、弾性部材５の外周面５aは中空ころ４のピン穴４aの軸方向中央部で中空ころ４と接触して係止部を形成している。   An elastic member 5 is inserted between the pin hole 4 a of the hollow roller 4 and the outer peripheral surface 3 e of the pin 3. The elastic member 5 has locking portions 5 a, 5 b, and 5 c, the locking portion 5 a extends in a radial shape in a barrel shape, and the inner peripheral surfaces 5 b and 5 c of the elastic member 5 are both end portions of the pin 3. The outer peripheral surface 5a of the elastic member 5 is in contact with the hollow roller 4 at the axial center of the pin hole 4a of the hollow roller 4 to form a locking portion.

さらに、前記ピン穴４aに接触する弾性部材５の外径側係止部５aと、前記ピン３の外周面３aに接触する接触する弾性部材５の内径側係止部５ｂ、５ｃは、互いに軸方向に離間して径方向に離間しており、弾性部材５の支持部と荷重の作用部を径方向および、軸方向に離間して弾性力を発生することにより、中空ころ４のピン穴４a及び前記ピン３の外周面３e間の非常に狭い空間で弾性力を発生できるように構成している。   Further, the outer diameter side locking portion 5a of the elastic member 5 that contacts the pin hole 4a and the inner diameter side locking portions 5b and 5c of the elastic member 5 that contact the outer peripheral surface 3a of the pin 3 are mutually connected to each other. Pin holes 4a of the hollow rollers 4 by generating elastic force by separating the supporting portion of the elastic member 5 and the acting portion of the load in the radial direction and the axial direction. The elastic force can be generated in a very narrow space between the outer peripheral surfaces 3e of the pins 3.

前記弾性部材５は、線材をコイル状にして、軸方向中央に最大外径５aを有し、両端を内径５ｂ、５ｃを絞った樽状形状を有している。材質は変形可能な弾性力を有する金属材料からなっている。詳しくは、前記弾性部材５は、一般的にステンレス線やピアノ線等の材料であって、必要により、耐食材の使用や表面処理がなされていてもよい。   The elastic member 5 has a barrel shape in which the wire is coiled, has a maximum outer diameter 5a at the center in the axial direction, and narrows both ends at the inner diameters 5b and 5c. The material is made of a metal material having a deformable elastic force. Specifically, the elastic member 5 is generally made of a material such as a stainless steel wire or a piano wire, and may be subjected to the use of a corrosion resistant material or a surface treatment if necessary.

前記第１実施形態によれば、弾性部材５の前記外径側係止部５a及び前記内径側係止部５ｂ，５ｃが、互いに軸方向に離間して径方向に離間してこの間に弾性力を有しているため、外径側係止部５aおよび内径側係止部５ｂ，５ｃ間の弾性力を有する部分の長さを大きくとることができ、この長さの製造上のばらつきがあっても弾性力が大きく変化することが無い利点がある。また、中空ころのピン穴および前記ピンの外周間の非常に狭い空間で弾性力を発生できる利点がある。
さらに、前記内径側係止部が両端にある樽状コイルばねであるのため、弾性部材の構造が簡単で安価となり、中空ころのピン穴および前記ピンの外周間の非常に狭い空間で弾性力を発生できる利点がある。 According to the first embodiment, the outer diameter side locking portion 5a and the inner diameter side locking portions 5b, 5c of the elastic member 5 are spaced apart from each other in the axial direction and separated in the radial direction, and elastic force therebetween. Therefore, the length of the portion having the elastic force between the outer diameter side locking portion 5a and the inner diameter side locking portions 5b and 5c can be increased, and there is a variation in manufacturing of this length. However, there is an advantage that the elastic force does not change greatly. Further, there is an advantage that elastic force can be generated in a very narrow space between the pin hole of the hollow roller and the outer periphery of the pin.
Further, since the inner diameter side locking portion is a barrel coil spring at both ends, the structure of the elastic member becomes simple and inexpensive, and the elastic force is generated in a very narrow space between the pin hole of the hollow roller and the outer periphery of the pin. There is an advantage that can be generated.

したがって、前記弾性部材５により、ピン３に対して中空ころ４が弾性支持されていることで、中空ころ４のピン穴４a及び前記ピン３の外周面３e間の非常に狭い空間で弾性力を発生できるため、中空ころ４とピン３とのすきまにおける自由な移動を規制して、保持器の打音や損傷の発生を防止したころ軸受を提供できる。   Therefore, since the hollow roller 4 is elastically supported by the elastic member 5 with respect to the pin 3, an elastic force is provided in a very narrow space between the pin hole 4a of the hollow roller 4 and the outer peripheral surface 3e of the pin 3. Therefore, it is possible to provide a roller bearing that restricts free movement in the clearance between the hollow roller 4 and the pin 3 and prevents occurrence of damage and damage to the cage.

図３は、第２実施形態のピンタイプ保持器ところの円周方向断面図である。
ころ軸受の内外輪は第１実施形態と同様であるので、説明を割愛する。 FIG. 3 is a circumferential cross-sectional view of the pin type cage according to the second embodiment.
Since the inner and outer rings of the roller bearing are the same as those in the first embodiment, description thereof is omitted.

図３に示すように、第２実施形態のピンタイプ保持器１８はピン１３の外周面１３ｃに深さDの環状溝１６を軸方向に複数有する。前記ピン１３の環状溝１６は、中空ころ１４のピン穴１４a内に配置されている。前記ピン１３の環状溝１６には、前記中空ころ１４のピン穴１４aの内周面１４ｂと前記ピン１３の環状溝１６の外周面１６a間に弾性部材１５が介挿されている。前記弾性部材１５は、係止部１５a、１５ｂ、１５ｃを有し、前記係止部１５aは、樽状に径方向に広がって、弾性部材１５の内周面１５ｂ、１５ｃはピン１３の環状溝１６の外周面の両端部１６ｂ、１６ｃと接し、弾性部材１５の外周面１５aは中空ころ１４のピン穴１４aでピン１３の環状溝１６に対応する軸方向中央部で中空ころ１４の内周面１４ｂと接触して係止部を形成している。   As shown in FIG. 3, the pin type retainer 18 of the second embodiment has a plurality of annular grooves 16 having a depth D on the outer peripheral surface 13 c of the pin 13 in the axial direction. The annular groove 16 of the pin 13 is disposed in the pin hole 14 a of the hollow roller 14. In the annular groove 16 of the pin 13, an elastic member 15 is inserted between the inner peripheral surface 14 b of the pin hole 14 a of the hollow roller 14 and the outer peripheral surface 16 a of the annular groove 16 of the pin 13. The elastic member 15 has locking portions 15 a, 15 b, 15 c, the locking portion 15 a extends in a radial shape in a barrel shape, and the inner peripheral surfaces 15 b, 15 c of the elastic member 15 are annular grooves of the pin 13. The outer peripheral surface 15a of the elastic member 15 is in contact with the both end portions 16b and 16c of the outer peripheral surface 16 and the inner peripheral surface of the hollow roller 14 is the pin hole 14a of the hollow roller 14 and the axial center portion corresponding to the annular groove 16 of the pin 13. 14b is formed and the latching | locking part is formed.

前記ピン穴１４aに接触する弾性部材１５の外形側係止部１５aと、前記ピン１３の環状溝１６の外周面１６aに接触する弾性部材１５の内形側係止部１５ｂ、１５ｃは、互いに軸方向に離間して径方向に離間しており、弾性部材１５の支持部と荷重の作用部を径方向および、軸方向に離間して弾性力を発生することにより、中空ころ１４のピン穴１４a及び前記ピン１３の環状溝１６の外周面１６a間の狭い空間で弾性力を発生できるように構成している。   The outer side locking portion 15a of the elastic member 15 in contact with the pin hole 14a and the inner side locking portions 15b and 15c of the elastic member 15 in contact with the outer peripheral surface 16a of the annular groove 16 of the pin 13 are mutually axial. Pin holes 14a of the hollow rollers 14 by generating elastic force by separating the supporting portion of the elastic member 15 and the acting portion of the load in the radial direction and the axial direction. In addition, the elastic force can be generated in a narrow space between the outer peripheral surfaces 16a of the annular grooves 16 of the pins 13.

さらに、前記弾性部材１５は、環状溝１６の溝深さDより小さい直径がｄの線材をコイル状にして、軸方向中央に最大外径１５aを有し、両端の内径１５ｂ、１５ｃを絞った樽状形状を有している。   Further, the elastic member 15 is formed by coiling a wire having a diameter d smaller than the groove depth D of the annular groove 16 and having a maximum outer diameter 15a at the center in the axial direction, and narrowing inner diameters 15b and 15c at both ends. It has a barrel shape.

前記ピン１３の環状溝１６に内挿された前記弾性部材１５が中空ころ１４の内周面１４ｂおよび、ピン１３の環状溝１６の外周面１６aで中空ころ１４を係止している。   The elastic member 15 inserted in the annular groove 16 of the pin 13 locks the hollow roller 14 on the inner peripheral surface 14 b of the hollow roller 14 and the outer peripheral surface 16 a of the annular groove 16 of the pin 13.

前記ピン１３の外周面１３aに深さDの環状溝１６を形成して、前記弾性部材１５の線径ｄが深さDより小さくすることで、前記環状溝１６を除いた部分に前記対抗する面と接触可能な接触面１３ｃを有し、前記弾性部材１５を径方向に偏心移動、径方向に変形させたときに前記対抗する面１３ｃと前記接触可能な接触面１４ｂと接触するようになっている。   An annular groove 16 having a depth D is formed on the outer peripheral surface 13 a of the pin 13, and the wire diameter d of the elastic member 15 is made smaller than the depth D, thereby opposing the portion excluding the annular groove 16. A contact surface 13c that can contact the surface, and when the elastic member 15 is eccentrically moved in the radial direction and deformed in the radial direction, the opposing surface 13c comes into contact with the contact surface 14b that can be contacted. ing.

前記第２実施形態によれば、中空ころ１４に大きな力が作用した場合に、中空ころ１４がピン１３と接触することで、保持器１８を介して他の中空ころ１４に前記大きな力を伝えることができる。中空ころ１４に大きな力が作用しないときは、中空ころ１４とピン１３とのすきまにおける自由な移動を規制して、打音や損傷の発生を防止したころ軸受を提供できる。   According to the second embodiment, when a large force is applied to the hollow roller 14, the hollow roller 14 comes into contact with the pin 13, whereby the large force is transmitted to the other hollow roller 14 via the cage 18. be able to. When a large force does not act on the hollow roller 14, it is possible to provide a roller bearing that restricts free movement in the clearance between the hollow roller 14 and the pin 13 and prevents occurrence of hitting sound and damage.

本実施形態では、環状溝１６をピン１３の外周部に設けてその環状凹部１３に弾性部材１５を係合させているが、環状溝１６は、中空ころの内周面１４ｂに設けてもよく、また、ピン１３の外周部１３ｃと中空ころ１４の内周面１４ｂの両方に設けてもよい。   In the present embodiment, the annular groove 16 is provided on the outer peripheral portion of the pin 13 and the elastic member 15 is engaged with the annular recess 13. However, the annular groove 16 may be provided on the inner peripheral surface 14 b of the hollow roller. Moreover, you may provide in both the outer peripheral part 13c of the pin 13, and the internal peripheral surface 14b of the hollow roller 14. FIG.

この発明では、第１環状側板の外周面の外径が第２環状側板の外周面の外径よりも大きい、第１環状側板と第２環状側板が大径環状側板と小径環状側板とからなっているが、前記第１実施形態の保持器は、前記第１環状側板１の外周面の外径が第２環状側板２の外周面の外径と略同じであってもよく、小径環状側板を円錐中空ころ軸受の内輪の円錐軌道面の小径側に配置するものであっても良い。   In this invention, the outer diameter of the outer peripheral surface of the first annular side plate is larger than the outer diameter of the outer peripheral surface of the second annular side plate, and the first annular side plate and the second annular side plate are composed of a large diameter annular side plate and a small diameter annular side plate. However, in the cage of the first embodiment, the outer diameter of the outer peripheral surface of the first annular side plate 1 may be substantially the same as the outer diameter of the outer peripheral surface of the second annular side plate 2, and the small-diameter annular side plate May be arranged on the small diameter side of the conical raceway surface of the inner ring of the conical hollow roller bearing.

尚、前記第１実施形態の保持器は、軸中心に沿った貫通穴を有する円すいころを保持するようになっていた。しかしながら、この発明の保持器は、軸中心に沿った貫通穴を有する円筒ころ、または、軸中心に沿った貫通穴を有する樽形ころ（凸面中空ころ）等、軸中心に沿った貫通穴を有する中空ころを保持できることは言うまでもない。   In addition, the holder | retainer of the said 1st Embodiment hold | maintained the tapered roller which has the through-hole along an axial center. However, the cage of the present invention has a through hole along the axial center, such as a cylindrical roller having a through hole along the axial center, or a barrel roller (convex hollow roller) having a through hole along the axial center. Needless to say, the hollow rollers can be held.

１…第１環状側板、 ２…第２環状側板、 ３…ピン、 ４…中空ころ、 ５…弾性部材、６…外輪、７…内輪   DESCRIPTION OF SYMBOLS 1 ... 1st cyclic | annular side plate, 2 ... 2nd cyclic | annular side plate, 3 ... Pin, 4 ... Hollow roller, 5 ... Elastic member, 6 ... Outer ring, 7 ... Inner ring

Claims (3)

外輪と、内輪と、前記外輪および前記内輪の間を転動しピン穴を有する複数の中空ころと、前記複数の中空ころを回転可能に支持する保持器とを備え、前記保持器は、第１環状側板と、第２環状側板と、前記第１環状側板および前記第２環状側板を連結する複数のピンとを有し、前記ピンを前記中空ころのピン穴に挿入することにより、前記ピンに前記中空ころが回転自在に支持されているころ軸受において、前記中空ころのピン穴および前記ピンの外周間に弾性部材を介挿し、前記弾性部材は、前記ピン穴に接触する外径側係止部と、前記ピンに接触する内径側係止部とを有し、前記外径側係止部および前記内径側係止部は、互いに軸方向に離間して径方向に離間してこの間に弾性力を有し、前記弾性部材によって前記中空ころを前記ピンに対して径方向に弾性支持したことを特徴とするころ軸受。 An outer ring, an inner ring, a plurality of hollow rollers that roll between the outer ring and the inner ring and have pin holes, and a cage that rotatably supports the plurality of hollow rollers. A first annular side plate, a second annular side plate, and a plurality of pins connecting the first annular side plate and the second annular side plate, and inserting the pins into pin holes of the hollow rollers, In the roller bearing in which the hollow roller is rotatably supported, an elastic member is inserted between the pin hole of the hollow roller and the outer periphery of the pin, and the elastic member is engaged with the outer diameter side in contact with the pin hole. And an inner diameter side latching portion that contacts the pin, and the outer diameter side latching portion and the inner diameter side latching portion are spaced apart from each other in the axial direction and elastically spaced therebetween. It has a force, the pin the hollow roller by the elastic member Roller bearing, characterized in that the elastically supported radially against. 前記弾性部材は、前記外径側係止部が軸方向中央にあり、前記内径側係止部が両端にある樽状コイルばねであることを特徴とする請求項１に記載のころ軸受。 2. The roller bearing according to claim 1 , wherein the elastic member is a barrel coil spring in which the outer diameter side locking portion is in the center in the axial direction and the inner diameter side locking portion is at both ends . 前記中空ころのピン穴の内周およびピンの外周の少なくとも一方に環状溝および接触面を互いに軸方向にずらして形成し、前記中空ころのピン穴の内周およびピンの外周の少なくとも他方と、前記環状溝との間に弾性部材を介挿し、前記弾性部材を径方向に偏心移動させ、径方向に変形させたときに、前記中空ころのピン穴の内周およびピンの外周の少なくとも一方と、前記接触面とが接触することを特徴とする請求項１から２のいずれか一項に記載のころ軸受。 At least one of the inner periphery of the pin hole of the hollow roller and the outer periphery of the pin is formed by shifting the annular groove and the contact surface in the axial direction relative to each other, and at least the other of the inner periphery of the pin hole of the hollow roller and the outer periphery of the pin, When an elastic member is inserted between the annular groove and the elastic member is eccentrically moved in the radial direction and deformed in the radial direction, at least one of the inner periphery of the pin hole and the outer periphery of the pin of the hollow roller The roller bearing according to claim 1, wherein the contact surface is in contact with the roller bearing.
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