JP2012017789A - Split cage of rolling bearing - Google Patents

Split cage of rolling bearing Download PDF

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Publication number
JP2012017789A
JP2012017789A JP2010154898A JP2010154898A JP2012017789A JP 2012017789 A JP2012017789 A JP 2012017789A JP 2010154898 A JP2010154898 A JP 2010154898A JP 2010154898 A JP2010154898 A JP 2010154898A JP 2012017789 A JP2012017789 A JP 2012017789A
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Prior art keywords
rolling bearing
camshaft
rolling
cage
split
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Japanese (ja)
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Kenichi Harada
健一 原田
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Toyota Motor Corp
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Toyota Motor 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
    • 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
    • F16C33/50—Cages for rollers or needles formed of interconnected members, e.g. chains
    • F16C33/502—Cages for rollers or needles formed of interconnected members, e.g. chains formed of arcuate segments retaining one or more rollers or needles
    • F16C33/504—Cages for rollers or needles formed of interconnected members, e.g. chains formed of arcuate segments retaining one or more rollers or needles with two segments, e.g. two semicircular 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
    • 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
    • F16C19/24—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 radial load mainly
    • F16C19/26—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 radial load mainly with a single row 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
    • F16C2360/00—Engines or pumps
    • F16C2360/18—Camshafts

Abstract

PROBLEM TO BE SOLVED: To provide a split cage of a rolling bearing, which can reduce increase in friction and probability of causing wear.SOLUTION: There is provided the split cage 10 of the rolling bearing in which a plurality of split piece bodies holding a rolling element are connected to form an annular cage. Projections 16 and recesses 18 are arranged on connection parts of the plurality of split piece bodies 12U, 12L, which are irregularly fitted to each other by movement in the axial direction of the split piece bodies 12U, 12L.

Description

本発明は、転がり軸受けの分割保持器、特に、エンジンのカムシャフト等を支持する転がり軸受け装置に用いられるのに好適な転がり軸受けの分割保持器に関する。   The present invention relates to a split cage for rolling bearings, and more particularly to a split cage for rolling bearings suitable for use in a rolling bearing device that supports a camshaft or the like of an engine.

従来から、転がり軸受けにおいて、分割された複数の分割片を互いに連結して環状に組み立てる分割保持器が知られている。例えば、特許文献１には、転動部材を保持する帯状分割片本体の長手方向の一端側に、凸状の連結部を該一端から突出させて形成すると共に、長手方向の他端側に凹状の連結部を該凸状の連結部と同形に形成し、これらの帯状分割片本体を互いに凹凸嵌合することによって、環状の保持器を形成するようにした転がり軸受けの分割保持器が記載されている。   2. Description of the Related Art Conventionally, in a rolling bearing, a split cage is known in which a plurality of divided pieces are connected to each other and assembled into an annular shape. For example, in Patent Document 1, a convex connecting portion is formed to protrude from one end side in the longitudinal direction of the strip-shaped split piece main body that holds the rolling member, and concave on the other end side in the longitudinal direction. A rolling bearing split cage is described in which the connecting portion is formed in the same shape as the convex connecting portion, and the belt-like split piece main bodies are engaged with each other to form an annular cage. ing.

特開２００３−１２０６８０号公報Japanese Patent Laid-Open No. 2003-120680

上述の特許文献１に記載の転がり軸受けの分割保持器においては、分割片本体の凹凸嵌合が、一の分割片本体の凸状の連結部を、他の分割片本体の凹状の連結部に対して環状の保持器の半径方向に嵌め込むことにより行われている。   In the split cage of the rolling bearing described in Patent Document 1 described above, the concave-convex fitting of the split piece main body changes the convex connecting portion of one split piece main body to the concave connecting portion of the other split piece main body. On the other hand, it is carried out by fitting in the radial direction of the annular cage.

しかしながら、この特許文献１に記載の分割片本体の凹凸嵌合技術では、凹凸嵌合された分割片本体が回転軸に直交する半径方向に移動可能であるので、回転による遠心力が作用すると環状の保持器の各分割片本体が外側に膨らむ方向に変位し、外輪に接触したり、転動体と偏当りしたりすることによるフリクションの増加や磨耗を発生させる恐れがあるものであった。   However, in the concave / convex fitting technology for the split piece main body described in Patent Document 1, the split piece main body fitted with the concave / convex is movable in the radial direction perpendicular to the rotation axis, and therefore, when a centrifugal force due to rotation acts, the ring piece main body is annular. Each of the split piece main bodies of the cage is displaced in the direction in which it bulges outward, and there is a risk of increasing friction and wear due to contact with the outer ring or being offset against the rolling elements.

そこで、本発明の目的は、フリクションの増加や磨耗を発生させる恐れを低減することが可能な転がり軸受けの分割保持器を提供することにある。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rolling bearing split cage that can reduce the risk of increased friction and wear.

上記目的を達成する本発明の一形態の転がり軸受けの分割保持器は、転動体を保持する分割片本体を複数個連結して環状の保持器を形成するようにした転がり軸受けの分割保持器であって、前記複数個の分割片本体のそれぞれの連結部に、互いの分割片本体の軸方向移動でもって凹凸嵌合する連結手段を設けたことを特徴とする。   A rolling bearing split cage according to an embodiment of the present invention that achieves the above object is a rolling bearing split cage in which a plurality of split piece main bodies that hold rolling elements are connected to form an annular cage. In addition, each of the plurality of divided piece main bodies is provided with connecting means for engaging with the concave and convex portions by axial movement of the respective divided piece main bodies.

上記目的を達成する本発明の一形態によれば、回転軸が回転すると、環状に形成された分割保持器も回転軸の回転に伴って回転し、遠心力によって分割片本体が半径方向外方に膨らむように変位しようとする。しかしながら、各分割片本体は、それぞれの連結部に設けられた、互いの分割片本体の軸方向移動でもって凹凸嵌合する連結手段によって連結されているので、その半径方向外方に膨らむような変位が抑制される。したがって、環状に形成された分割保持器が外輪に接触したり、転動体と偏当りしたりすることが抑制され、フリクションの増加や磨耗を発生させるのを低減することが可能な転がり軸受けの分割保持器を得ることができるという効果を奏する。   According to one aspect of the present invention that achieves the above object, when the rotating shaft rotates, the annularly formed divided cage also rotates with the rotation of the rotating shaft, and the divided piece main body is radially outward by centrifugal force. Try to displace to swell. However, since each divided piece main body is connected by a connecting means provided in each connecting portion, which is concavo-convexly fitted by movement of each divided piece main body in the axial direction, it swells outward in the radial direction. Displacement is suppressed. Therefore, it is possible to suppress the ring-shaped split cage from coming into contact with the outer ring or from being in contact with the rolling elements, and to reduce the increase in friction and the occurrence of wear. There is an effect that a cage can be obtained.

本発明に係る転がり軸受けの分割保持器の一実施形態を示す斜視図である。It is a perspective view which shows one Embodiment of the division holder of the rolling bearing which concerns on this invention. 本発明に係る分割保持器を含む転がり軸受けの使用状態を示す側断面図である。It is a sectional side view which shows the use condition of the rolling bearing containing the division | segmentation holder | retainer which concerns on this invention. 本発明に係る分割保持器を含む転がり軸受けをエンジンのカムシャフトに用いた一実施形態の側面図であり、（Ａ）は組立前、（Ｂ）は組立後を示す。It is a side view of one Embodiment which used the rolling bearing containing the division | segmentation holder | retainer concerning this invention for the cam shaft of an engine, (A) shows before an assembly, (B) shows after an assembly. 本発明に係る分割保持器を含む転がり軸受けをエンジンのカムシャフトに用いた他の実施形態を示す側面図である。It is a side view which shows other embodiment which used the rolling bearing containing the division | segmentation holder | retainer concerning this invention for the camshaft of an engine.

以下に、本発明の実施の形態を、添付図面を参照しつつ詳細に説明する。   Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

まず、図１及び図２を参照して、本発明に係る転がり軸受けの分割保持器１０及びそれを含む転がり軸受け２０を説明する。   First, a rolling bearing split cage 10 and a rolling bearing 20 including the same according to the present invention will be described with reference to FIGS. 1 and 2.

本実施形態の分割保持器１０は、複数個（図示の例では２個）の分割片本体１２を有し、それぞれの分割片本体１２には、後述する転動体を転動自在に収容するポケット１４が形成されている。そして、図示の上側及び下側の分割片本体１２Ｕ及び１２Ｌ（以下、上側及び下側の分割片本体１２を区別する必要があるときは、添字「Ｕ」又は「Ｌ」を付し区別することにする）の連結部には連結手段が設けられている。この連結手段として、図１に示す実施形態では、上側の分割片本体１２Ｕの周方向端面から突出する形態で、断面逆凸形状の凸部１６が形成され、下側の分割片本体１２Ｌの周方向端面付近にはその軸方向端面に開口し、上記断面逆凸形状の凸部１６と補完する関係の断面溝形状の凹部１８が形成されている。これらの断面逆凸形状の凸部１６と断面溝形状の凹部１８とは、上側及び下側の分割片本体１２Ｕ及び１２Ｌを互いに軸方向移動させることでもって凹凸嵌合し、そして特に、上側及び下側の分割片本体１２Ｕ及び１２Ｌの相対的な径方向変位が生じないように形成されている。なお、図１に示す実施形態では、上側の分割片本体１２Ｕの周方向両端面に凸部１６を形成したが、分割片本体１２の周方向一端面に凸部１６を、周方向他端面に凹部１８を形成するようにしてもよい。このようにすると、上側及び下側を区別することなく、任意の分割片本体１２を連結することによって環状の保持器１０を形成することができる。   The divided cage 10 of the present embodiment has a plurality (two in the illustrated example) of divided piece main bodies 12, and each divided piece main body 12 has a pocket for freely rolling rolling elements described later. 14 is formed. And the upper and lower divided piece main bodies 12U and 12L shown in the figure (hereinafter, when it is necessary to distinguish the upper and lower divided piece main bodies 12 from each other, the subscripts “U” or “L” are attached and distinguished. The connecting means is provided with connecting means. As the connecting means, in the embodiment shown in FIG. 1, a convex portion 16 having an inverted convex cross section is formed in a form protruding from the circumferential end surface of the upper divided piece body 12U, and the circumference of the lower divided piece body 12L is formed. In the vicinity of the direction end face, there is formed a recess 18 having a groove shape in a cross-section that opens to the end face in the axial direction and complements the convex part 16 having the reverse convex cross section. The convex portion 16 having a reverse convex shape in section and the concave portion 18 having a groove shape in cross section are engaged with each other by moving the upper and lower divided piece bodies 12U and 12L in the axial direction relative to each other. The lower split piece main bodies 12U and 12L are formed so as not to cause relative radial displacement. In the embodiment shown in FIG. 1, the convex portions 16 are formed on both end surfaces in the circumferential direction of the upper divided piece main body 12 </ b> U, but the convex portions 16 are formed on one end surface in the circumferential direction of the divided piece main body 12. The recess 18 may be formed. If it does in this way, the cyclic | annular holder | retainer 10 can be formed by connecting arbitrary division | segmentation piece main bodies 12, without distinguishing an upper side and a lower side.

上述の分割保持器１０を含む転がり軸受け２０は、図２に示すように、例えば、カムシャフト３０の軸受けとして用いられる。   As shown in FIG. 2, the rolling bearing 20 including the above-described split cage 10 is used as a bearing for the camshaft 30, for example.

４０は軸受ハウジングであり、本実施形態では、不図示のシリンダーヘッドに一体に形成されるか、又は別体に形成されてシリンダーヘッドに組み付けられるカムハウジングと、該カムハウジングに固定されるキャップとから構成されている。カムハウジング及びキャップは、それぞれ、半円柱状の凹部を備えて形成され、両者が合体されたとき、円柱状の軸受ハウジング収容部が形成される。軸受ハウジング収容部に収容される転がり軸受け２０は、外輪２２と、カムシャフト３０（内輪を有する場合は内輪）の外周面と外輪２２との間に配置されて保持器１０のポケット１４に保持された複数個の転動体２４とを備えている。   Reference numeral 40 denotes a bearing housing. In this embodiment, a cam housing that is formed integrally with a cylinder head (not shown) or formed separately and assembled to the cylinder head, and a cap that is fixed to the cam housing. It is composed of Each of the cam housing and the cap is formed with a semi-cylindrical recess, and when both are combined, a cylindrical bearing housing accommodating portion is formed. The rolling bearing 20 accommodated in the bearing housing accommodating portion is disposed between the outer ring 22 and the outer peripheral surface of the camshaft 30 (inner ring in the case of having an inner ring) and the outer ring 22 and is held in the pocket 14 of the cage 10. And a plurality of rolling elements 24.

なお、外輪２２は、環状に一体に形成されるか、通常の上下の半割りで環状に形成されるか、又は上述の環状の保持器１０と同じように、軸方向移動によって凹凸嵌合される分割片で環状に形成される形態のものであってもよい。   The outer ring 22 is integrally formed in an annular shape, is formed in an annular shape with a normal upper and lower halves, or is concavo-convexly fitted by axial movement in the same manner as the annular retainer 10 described above. The thing of the form formed cyclically | annularly by the divided piece which may be sufficient.

かくて、上記の構成になる実施形態によれば、カムシャフト３０が回転すると、環状に形成された分割保持器１０もカムシャフト３０の回転に伴って回転し、遠心力によって分割片本体１２が半径方向外方に膨らむように変位しようとする。しかしながら、各分割片本体１２は、それぞれの連結部に設けられた、互いの分割片本体１２の軸方向移動でもって凹凸嵌合する凸部１６と凹部１８とによって連結されているので、その半径方向外方に膨らむような変位が抑制される。したがって、環状に形成された分割保持器１０が外輪２２に接触したり、転動体２４と偏当りしたりすることが抑制され、フリクションの増加や磨耗の発生が低減される。   Thus, according to the embodiment having the above-described configuration, when the camshaft 30 rotates, the split cage 10 formed in an annular shape also rotates with the rotation of the camshaft 30, and the split piece main body 12 is rotated by centrifugal force. Trying to displace radially outward. However, since each divided piece main body 12 is connected by the convex part 16 and the concave part 18 which are provided in the respective connecting parts and which are engaged with each other by the axial movement of the respective divided piece main bodies 12, the radius thereof Displacement that swells outward in the direction is suppressed. Therefore, it is suppressed that the split cage 10 formed in an annular shape comes into contact with the outer ring 22 or strikes against the rolling elements 24, and the increase in friction and the occurrence of wear are reduced.

次に、上述の分割保持器１０を含む転がり軸受け２０を複数個、エンジンのカムシャフト３０に使用するに際しての、好適な一実施形態を、図３を参照して説明する。   Next, a preferred embodiment when a plurality of rolling bearings 20 including the above-described split cage 10 are used for the camshaft 30 of the engine will be described with reference to FIG.

この実施形態におけるカムシャフト３０は、４気筒往復動エンジンのカムシャフト３０であり、その最前端にカムシャフト３０へ回転力を入力するためのチェーンスプロケット３２が取付けられている。そして、カムシャフト３０は、気筒当り２個ずつ設けられた吸気弁又は排気弁を開閉駆動するために、気筒当り２個のカムローブ３０Ｃ（以下、第１乃至第４気筒に対応する２個ずつのカムローブを、順に、第１乃至第４カムローブと称し、３０Ｃ＃１乃至３０Ｃ＃４と表す）を有している。さらに、カムシャフト３０は、チェーンスプロケット３２が取付けられた前端側、すなわち、チェーンスプロケット３２と第１カムローブ３０Ｃ＃１との間に第１ジャーナル部＃１Ｊを備えると共に、第１及び第２のカムローブ３０Ｃ＃１及び３０Ｃ＃２の間、第２及び第３のカムローブ３０Ｃ＃２及び３０Ｃ＃３の間、及び第３及び第４のカムローブ３０Ｃ＃３及び３０Ｃ＃４の間に、順に、第２、第３及び第４のジャーナル部＃２Ｊ、＃３Ｊ、及び＃４Ｊを備えている。そして、最後に、第４のカムローブ３０Ｃ＃４とカムシャフト３０の後端との間に第５のジャーナル部＃５Ｊを備えている。   The camshaft 30 in this embodiment is a camshaft 30 of a four-cylinder reciprocating engine, and a chain sprocket 32 for inputting rotational force to the camshaft 30 is attached to the front end thereof. The camshaft 30 has two cam lobes 30C (hereinafter, two corresponding to the first to fourth cylinders) in order to open and close the intake valves or the exhaust valves provided by two per cylinder. The cam lobes are sequentially referred to as first to fourth cam lobes and represented as 30C # 1 to 30C # 4). Further, the camshaft 30 includes a first journal portion # 1J at the front end side where the chain sprocket 32 is attached, that is, between the chain sprocket 32 and the first cam lobe 30C # 1, and the first and second cam lobes. 30C # 1 and 30C # 2, between the second and third cam lobes 30C # 2 and 30C # 3, and between the third and fourth cam lobes 30C # 3 and 30C # 4, in order. , Third and fourth journal portions # 2J, # 3J, and # 4J. Finally, a fifth journal portion # 5J is provided between the fourth cam lobe 30C # 4 and the rear end of the camshaft 30.

ここで、上記第１乃至第５のジャーナル部＃１Ｊ乃至＃５Ｊには、それぞれ、転がり軸受けが装着されている。図示の実施形態は、上記の第１及び第５のジャーナル部＃１Ｊ及び＃５Ｊに対して、通常の転がり軸受け２０Ａ（すなわち、分割保持器を含まない一体型の転がり軸受）を用い、各気筒に対応するカムローブ３０Ｃの間のジャーナル部、すなわち、第２、第３及び第４のジャーナル部＃２Ｊ、＃３Ｊ及び＃４Ｊに対しては、上述の分割保持器１０を含む転がり軸受け２０が用いられている。これは、転がり軸受けを装着するに際し、カムシャフト３０の第１及び第５のジャーナル部＃１Ｊ及び＃５Ｊに対しては、カムローブ３０Ｃの存在に邪魔されずに、カムシャフト３０の前端又は後端から装着することが可能であるが、第２、第３及び第４のジャーナル部＃２Ｊ、＃３Ｊ及び＃４Ｊに対しては、カムローブ３０Ｃが邪魔する（カムローブが焼嵌めなどで取付けられる組立式カムシャフトの場合を除き）ので、分割保持器を含まない一体型の転がり軸受を装着するのが困難であるからである。もちろん、第１及び第５のジャーナル部＃１Ｊ及び＃５Ｊに対しても分割保持器１０を含む転がり軸受け２０を用いてもよい。   Here, rolling bearings are attached to the first to fifth journal portions # 1J to # 5J, respectively. In the illustrated embodiment, a normal rolling bearing 20A (that is, an integrated rolling bearing not including a split cage) is used for each of the cylinders for the first and fifth journal portions # 1J and # 5J. For the journal portion between the cam lobes 30C corresponding to the above, that is, the second, third and fourth journal portions # 2J, # 3J and # 4J, the rolling bearing 20 including the above-described divided holder 10 is used. It has been. This is because the front and rear ends of the camshaft 30 are not obstructed by the presence of the cam lobe 30C for the first and fifth journal portions # 1J and # 5J of the camshaft 30 when the rolling bearing is mounted. However, the cam lobe 30C interferes with the second, third and fourth journal portions # 2J, # 3J and # 4J (the assembly type in which the cam lobe is attached by shrink fitting or the like). This is because it is difficult to mount an integrated rolling bearing that does not include a split cage. Of course, the rolling bearing 20 including the split cage 10 may be used for the first and fifth journal portions # 1J and # 5J.

そこで、かかる分割保持器１０を含む転がり軸受け２０を第２、第３及び第４のジャーナル部＃２Ｊ、＃３Ｊ及び＃４Ｊに対して装着するには、まず、上側及び下側の分割片本体１２Ｕ及び１２Ｌのそれぞれのポケット１４に転動体２４を収容する。そして、この転動体２４が収容された下側の分割片本体１２Ｌを、図３（Ａ）に示すように、カムシャフト３０への回転力入力側、すなわち、チェーンスプロケット３２が取付けられた前端に近い側のカムローブ３０Ｃに寄せて配置する。換言すると、例えば、第２のジャーナル部＃２Ｊに対して装着するときは、第１カムローブ３０Ｃ＃１に寄せて配置するのである。さらに、転動体２４が収容された上側の分割片本体１２Ｕを、例えば、第２のジャーナル部＃２Ｊに対して装着するときは、第２カムローブ３０Ｃ＃２に寄せて配置し、図３（Ａ）に矢印で示すように、下側の分割片本体１２Ｌに対して軸方向に移動させることによって、上述のように凸部１６と凹部１８とを凹凸嵌合させ、上側の分割片本体１２Ｕを下側の分割片本体１２Ｌに連結させる。その後、上側の分割片本体１２Ｕと下側の分割片本体１２Ｌとが連結されて環状に形成され、転動体２４を収容している分割保持器１０に対し、例えば、上下に半割りされた外輪２２がそれぞれ装着される。   Therefore, in order to mount the rolling bearing 20 including the split cage 10 on the second, third and fourth journal portions # 2J, # 3J and # 4J, first, the upper and lower split piece main bodies are used. The rolling elements 24 are accommodated in the pockets 14 of 12U and 12L. Then, as shown in FIG. 3A, the lower divided piece main body 12L in which the rolling elements 24 are accommodated is placed on the rotational force input side to the camshaft 30, that is, the front end to which the chain sprocket 32 is attached. It arrange | positions near the cam lobe 30C of the near side. In other words, for example, when being mounted on the second journal portion # 2J, it is arranged close to the first cam lobe 30C # 1. Further, for example, when the upper divided piece main body 12U in which the rolling elements 24 are accommodated is attached to the second journal portion # 2J, the upper divided piece main body 12U is disposed close to the second cam lobe 30C # 2, as shown in FIG. ), The convex portion 16 and the concave portion 18 are concavo-convexly engaged with each other by moving in the axial direction with respect to the lower divided piece main body 12L, and the upper divided piece main body 12U is The lower split piece main body 12L is connected. Thereafter, the upper divided piece main body 12U and the lower divided piece main body 12L are connected to each other and formed into an annular shape. 22 are respectively mounted.

かくて、図３（Ｂ）に示すように、第１乃至第４気筒用の第１乃至第４のカムローブ３０Ｃ＃１乃至３０Ｃ＃４のそれぞれの間、第２乃至第４のジャーナル部＃２Ｊ乃至＃４Ｊに配置された転がり軸受け２０が、それぞれ、カムシャフト３０への回転力入力側、すなわち、チェーンスプロケット３２が取付けられた前端に近い側のカムローブに寄せて配置されたカムシャフトの転がり軸受け装置が得られる。   Thus, as shown in FIG. 3B, the second to fourth journal portions # 2J are provided between the first to fourth cam lobes 30C # 1 to 30C # 4 for the first to fourth cylinders. Rolling bearings 20 arranged in # 4J to # 4J are camshaft rolling bearings arranged close to the cam lobe on the side where the rotational force is input to the camshaft 30, that is, on the side close to the front end to which the chain sprocket 32 is attached. A device is obtained.

この形態では、カムシャフト３０がチェーンスプロケット３２に噛み合わされた不図示のチェーンを介して不図示のクランクシャフトにより回転駆動されるとき、第１のジャーナル部＃１Ｊにおける転がり軸受け２０Ａに対しては、チェーン張力Ｔによって荷重Ｘが負荷される。そこで、チェーンスプロケット３２から、第２のジャーナル部＃２Ｊに配置される転がり軸受け２０において、チェーンスプロケット３２が取付けられた前端に近い側のカムローブ、すなわち、第１のカムローブ３０Ｃ＃１に寄せて配置された転がり軸受け２０までの距離をｄとすると、この距離ｄは、転がり軸受け２０を第２のカムローブ３０Ｃ＃２に寄せて配置する場合の距離Ｄに比べて短くなる。この結果、上述の荷重Ｘの最大値を低減することができる。また、吸気弁又は排気弁のバルブリフト時には、第１のカムローブ３０Ｃ＃１に作用する張力Ｔと逆方向の半力Ｒにより、第１のジャーナル部＃１Ｊにおける転がり軸受け２０Ａ及び第２のジャーナル部＃２Ｊにおける転がり軸受け２０に対して、荷重Ｘと逆方向の荷重Ｙが負荷される。これらの荷重Ｙは、転がり軸受け２０がより短い距離ｄで、第１のカムローブ３０Ｃ＃１に寄せて配置されていることから、ほぼ等しい大きさである。したがって、図３（Ｂ）に示す形態によれば、第１のジャーナル部＃１Ｊにおける転がり軸受け２０Ａに対する最大軸受け荷重を低減することができると共に、バルブリフト時における軸受け荷重の変動幅を小さくすることができる。   In this embodiment, when the camshaft 30 is rotationally driven by a crankshaft (not shown) via a chain (not shown) meshed with the chain sprocket 32, the rolling bearing 20A in the first journal portion # 1J is A load X is applied by the chain tension T. Therefore, in the rolling bearing 20 disposed in the second journal portion # 2J from the chain sprocket 32, the cam sprocket is disposed near the cam lobe near the front end to which the chain sprocket 32 is attached, that is, the first cam lobe 30C # 1. Assuming that the distance to the rolling bearing 20 is d, this distance d is shorter than the distance D when the rolling bearing 20 is arranged close to the second cam lobe 30C # 2. As a result, the maximum value of the load X described above can be reduced. Further, during the valve lift of the intake valve or the exhaust valve, the rolling bearing 20A and the second journal part in the first journal part # 1J are caused by the half force R in the direction opposite to the tension T acting on the first cam lobe 30C # 1. A load Y in a direction opposite to the load X is applied to the rolling bearing 20 in # 2J. These loads Y are approximately equal in magnitude since the rolling bearing 20 is disposed closer to the first cam lobe 30C # 1 at a shorter distance d. Therefore, according to the embodiment shown in FIG. 3B, the maximum bearing load on the rolling bearing 20A in the first journal portion # 1J can be reduced, and the fluctuation range of the bearing load at the time of valve lift can be reduced. Can do.

さらに、上述の分割保持器１０を含む転がり軸受け２０を複数個、エンジンのカムシャフト３０に使用するに際しての、他の実施形態を、図４を参照して説明する。この実施形態は、図３に示した実施形態にさらに転がり軸受けを追加したものであり、基本的な構造は同じであるので、同一部品には同一符号を付し重複説明を避ける。   Furthermore, another embodiment when using a plurality of rolling bearings 20 including the above-described split cage 10 for the camshaft 30 of the engine will be described with reference to FIG. In this embodiment, a rolling bearing is further added to the embodiment shown in FIG. 3, and the basic structure is the same.

すなわち、図４に示す実施形態では、第１及び第２のカムローブ３０Ｃ＃１及び３０Ｃ＃２の間、第２及び第３のカムローブ３０Ｃ＃２及び３０Ｃ＃３の間、及び第３及び第４のカムローブ３０Ｃ＃３及び３０Ｃ＃４の間の第２、第３及び第４のジャーナル部＃２Ｊ、＃３Ｊ、及び＃４Ｊに、それぞれ、２つの転がり軸受け２０がそれぞれのカムローブに近接させて配置されている。   That is, in the embodiment shown in FIG. 4, between the first and second cam lobes 30C # 1 and 30C # 2, between the second and third cam lobes 30C # 2 and 30C # 3, and between the third and fourth cam lobes. Two rolling bearings 20 are arranged close to the respective cam lobes in the second, third and fourth journal portions # 2J, # 3J and # 4J between the cam lobes 30C # 3 and 30C # 4, respectively. Has been.

この形態によれば、２つの転がり軸受け２０がそれぞれのカムローブ３０Ｃに近接させて配置されている、例えば、第３のジャーナル部＃３Ｊにおいては左側の転がり軸受け２０が第２のカムローブ３０Ｃ＃２に、右側の転がり軸受け２０が第３のカムローブ３０Ｃ＃３に近接させて配置されているので、それぞれの間の距離が短く、バルブリフト時において軸受けに作用するモーメントを低減することができる。   According to this embodiment, the two rolling bearings 20 are arranged close to the respective cam lobes 30C. For example, in the third journal portion # 3J, the left rolling bearing 20 is connected to the second cam lobe 30C # 2. Since the right-side rolling bearing 20 is disposed close to the third cam lobe 30C # 3, the distance between them is short, and the moment acting on the bearing during valve lift can be reduced.

１０ 分割保持器
１２ 分割片本体
１２Ｕ 上側の分割片本体
１２Ｌ 下側の分割片本体
１４ ポケット
１６ 凸部
１８ 凹部
２０ 転がり軸受け
２２ 外輪
２４ 転動体
３０ カムシャフト
３０Ｃ カムローブ
３２ チェーンスプロケット
４０ 軸受ハウジング DESCRIPTION OF SYMBOLS 10 Divided cage 12 Divided piece main body 12U Upper divided piece main body 12L Lower divided piece main body 14 Pocket 16 Convex part 18 Concave part 20 Rolling bearing 22 Outer ring 24 Rolling body 30 Camshaft 30C Cam lobe 32 Chain sprocket 40 Bearing housing

Claims (4)

転動体を保持する分割片本体を複数個連結して環状の保持器を形成するようにした転がり軸受けの分割保持器であって、
前記複数個の分割片本体のそれぞれの連結部に、互いの分割片本体の軸方向移動でもって凹凸嵌合する連結手段を設けたことを特徴とする転がり軸受けの分割保持器。 A rolling cage split cage in which a plurality of split piece main bodies for holding rolling elements are connected to form an annular cage,
A rolling cage split cage, wherein each of the plurality of split piece main bodies is provided with connecting means for engaging with each other by axial movement of the respective split piece main bodies. 請求項１に記載の分割保持器に保持された転動体と少なくとも外輪とからなる転がり軸受けを備えるカムシャフトの転がり軸受け装置であって、異なる気筒用のカムローブ間に配置される前記転がり軸受けは、それぞれ、カムシャフトへの回転力入力側に近いカムローブに寄せて配置されていることを特徴とするカムシャフトの転がり軸受け装置。   A rolling bearing device for a camshaft comprising a rolling bearing comprising at least an outer ring and a rolling element held by the split cage according to claim 1, wherein the rolling bearing disposed between cam lobes for different cylinders includes: A rolling bearing device for a camshaft, characterized in that each of the camshaft rolling bearing devices is arranged close to a cam lobe close to a rotational force input side to the camshaft. 請求項１に記載の分割保持器に保持された転動体と少なくとも外輪とからなる転がり軸受けを備えるカムシャフトの転がり軸受け装置であって、異なる気筒用のカムローブ間でそれぞれのカムローブに近接させて前記転がり軸受けが配置されていることを特徴とするカムシャフトの転がり軸受け装置。   A rolling bearing device for a camshaft comprising a rolling bearing comprising at least an outer ring and a rolling element held by the split cage according to claim 1, wherein the cam lobes are arranged close to each cam lobe for different cylinders. A rolling bearing device for a camshaft comprising a rolling bearing. 保持器に保持された転動体と少なくとも外輪とからなる転がり軸受けを備えるカムシャフトの転がり軸受け装置であって、異なる気筒用のカムローブ間に配置される前記転がり軸受けは、それぞれ、カムシャフトへの回転力入力側に近いカムローブに寄せて配置されていることを特徴とするカムシャフトの転がり軸受け装置。   A rolling bearing device for a camshaft comprising a rolling bearing comprised of a rolling element held at a cage and at least an outer ring, wherein each of the rolling bearings disposed between cam lobes for different cylinders rotates to the camshaft. A camshaft rolling bearing device, wherein the camshaft rolling bearing device is arranged close to a cam lobe close to a force input side.
JP2010154898A 2010-07-07 2010-07-07 Split cage of rolling bearing Pending JP2012017789A (en)

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Publication number Priority date Publication date Assignee Title
CN105134785A (en) * 2015-09-18 2015-12-09 宁波中和汽配有限公司 Bearing rolling needle holder
DE102014222096A1 (en) * 2014-10-29 2016-05-04 Aktiebolaget Skf Crankshaft or connecting rod bearings of an internal combustion engine or a compressor
CN111536156A (en) * 2019-02-07 2020-08-14 斯凯孚公司 Bearing cage segment comprising alignment elements

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JP2008002334A (en) * 2006-06-21 2008-01-10 Toyota Motor Corp Cylinder head unit of internal-combustion engine and spacer provided in cylinder head unit
JP2008215158A (en) * 2007-03-02 2008-09-18 Jtekt Corp Rolling bearing device

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Publication number Priority date Publication date Assignee Title
JPS54101241U (en) * 1977-12-28 1979-07-17
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JP2008002334A (en) * 2006-06-21 2008-01-10 Toyota Motor Corp Cylinder head unit of internal-combustion engine and spacer provided in cylinder head unit
JP2008215158A (en) * 2007-03-02 2008-09-18 Jtekt Corp Rolling bearing device

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Publication number Priority date Publication date Assignee Title
DE102014222096A1 (en) * 2014-10-29 2016-05-04 Aktiebolaget Skf Crankshaft or connecting rod bearings of an internal combustion engine or a compressor
US9638250B2 (en) 2014-10-29 2017-05-02 Aktiebolaget Skf Cage for a crankshaft bearing or connecting-rod bearing of an internal combustion engine or of a compressor
DE102014222096B4 (en) * 2014-10-29 2019-04-25 Aktiebolaget Skf Crankshaft or connecting rod bearings of an internal combustion engine or a compressor
CN105134785A (en) * 2015-09-18 2015-12-09 宁波中和汽配有限公司 Bearing rolling needle holder
CN111536156A (en) * 2019-02-07 2020-08-14 斯凯孚公司 Bearing cage segment comprising alignment elements

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