JPH06331003A - Cam follower - Google Patents

Cam follower

Info

Publication number
JPH06331003A
JPH06331003A JP5142502A JP14250293A JPH06331003A JP H06331003 A JPH06331003 A JP H06331003A JP 5142502 A JP5142502 A JP 5142502A JP 14250293 A JP14250293 A JP 14250293A JP H06331003 A JPH06331003 A JP H06331003A
Authority
JP
Japan
Prior art keywords
roller
peripheral surface
rollers
support shaft
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5142502A
Other languages
Japanese (ja)
Inventor
Koichi Okuda
康一 奥田
Kazuhisa Kitamura
和久 北村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
Original Assignee
Koyo Seiko Co Ltd
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 Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP5142502A priority Critical patent/JPH06331003A/en
Publication of JPH06331003A publication Critical patent/JPH06331003A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)
  • Gears, Cams (AREA)

Abstract

PURPOSE:To smooth lubricating oil to supplying between a roller and a supporting shaft so as to ensure lubricating property by constituting a cam follower by fitting rotatably the roller divided into two parts at minute space in axial direction on the metal made supporting shaft of a driven member. CONSTITUTION:A roller which is brought in contact with a cam in an engine and which is a cam invertor for driving a valve supported between a pair of parallel rocker arms R and R by a supporting shaft 2, consists of rollers 1A and 1B which are divided into two parts in axial direction and which fit- supported rotatably on the supporting shaft 2. Suitable minute spaces 3 are formed between the outer side end surface of the rollers 1A, 1B and both side surface of a roller hole H, between both inner side end surfaces of the rollers 1A, 1B, and between the inner circumferential surface of the roller 1A, 1B and the outer circumferential surface of the supporting shaft 2. The roller 1A, 1B are made of ceramic, and a projection part for ensuring minute space is formed on at least one of the opposing end surface of a rotor.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、カム従動子、例えば
エンジンの弁駆動用のカム従動子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam follower, for example, a cam follower for driving a valve of an engine.

【０００２】[0002]

【従来の技術】図４に示すようなエンジンにおいてカム
Ｃに接するロッカーアームＲのローラ１は、従来の技術
においては、図５に示すようにロッカーアームＲに金属
製の支軸２で回転自在に支持されて構成されている。2. Description of the Related Art In an engine as shown in FIG. 4, a roller 1 of a rocker arm R contacting a cam C is freely rotatable on a rocker arm R by a metal support shaft 2 as shown in FIG. It is configured to be supported by.

【０００３】そして、支軸２の外周面とローラ１の内周
面との間の摩擦により両者の摩耗が激しいので、両者間
の潤滑性の向上を図るために、ローラ１の内周面ある程
度の制御された粗さを持たせて、例えばローレット加工
を施して、潤滑油が保持されるようにしている。更にロ
ーラ１の軽量化及び耐摩耗性、特にその内周面の耐焼付
性や耐摩耗性を向上させるためにローラ１をセラミック
ス製にすることもある。Since friction between the outer peripheral surface of the support shaft 2 and the inner peripheral surface of the roller 1 causes severe wear of both, in order to improve lubricity between the both, the inner peripheral surface of the roller 1 to some extent. With controlled roughness, the knurling process is performed to retain the lubricating oil. Further, in order to reduce the weight of the roller 1 and wear resistance thereof, particularly seizure resistance and wear resistance of the inner peripheral surface thereof, the roller 1 may be made of ceramics.

【０００４】[0004]

【発明が解決しようとする課題】上記のように、エンジ
ンの弁駆動用のロッカーアームのローラの内周面と支軸
の外周面との間が潤滑状態に関して最も劣化の問題が生
じ、この部分に焼付け等の不具合が発生する。As described above, the problem of the greatest deterioration occurs in the lubrication state between the inner peripheral surface of the roller of the rocker arm for driving the engine valve and the outer peripheral surface of the support shaft. Problems such as baking occur.

【０００５】それへの対応として、従来の技術のエンジ
ンの弁駆動用のロッカーアームのローラは、ローラの内
周面と支軸の外周面との間の潤滑性の向上を図るため
に、ローラの内周面にローレット加工等の粗面加工を施
して、潤滑油が保持されるようにしているが、全面に亘
る潤滑油の供給も十分でない上、粗面加工も手数が掛
る。In response to this, a roller of a rocker arm for driving a valve of an engine of the prior art is a roller for improving lubricity between an inner peripheral surface of the roller and an outer peripheral surface of a support shaft. The inner peripheral surface is roughened such as knurling so that the lubricating oil is retained, but the supply of the lubricating oil over the entire surface is not sufficient and the roughening is troublesome.

【０００６】又、ローラをセラミックス製にした場合に
は、ローラ側の耐焼付性や耐摩耗性はよいが、支軸側の
摩耗は、一層問題になり、しかもセラミックス材では、
ローラの内周面にローレット加工等の粗面加工を施こす
こともかなわない。When the roller is made of ceramics, seizure resistance and wear resistance on the roller side are good, but wear on the support shaft side becomes more problematic.
It is not possible to apply rough surface processing such as knurling to the inner surface of the roller.

【０００７】この発明は、カム従動子、例えばエンジン
の弁駆動用のカム従動子におけるローラと支軸との上記
のような潤滑問題を解決することを目的としている。An object of the present invention is to solve the above-mentioned lubrication problem of a roller and a support shaft in a cam follower, for example, a cam follower for driving a valve of an engine.

【０００７】[0007]

【課題を解決するための手段】この発明のカム従動子
は、従動部材（例えばロッカーアーム）の金属製の支軸
に軸線方向において微小隙間を形成し得るように複数に
分割され、且つカムに係合するローラが回転自在に嵌合
支承されており、好ましくは、ローラの対向端面の少な
くとも一方に突起部が形成されている。The cam follower of the present invention is divided into a plurality of parts so that a minute gap can be formed in the axial direction on the metal support shaft of the follower member (eg rocker arm), and the cam follower is The engaging roller is rotatably fitted and supported, and preferably, a protrusion is formed on at least one of the opposite end surfaces of the roller.

【０００８】又、前記ローラがセラミックス製であって
もよく、その場合は、ローラの外周面にカムに係合する
金属製のスリーブを回転自在に嵌合するのが好ましい。Further, the roller may be made of ceramics. In that case, it is preferable to rotatably fit a metal sleeve engaging with a cam to the outer peripheral surface of the roller.

【０００９】[0009]

【作用】上記のカム従動子は、カムの回転に伴ってロー
ラ、即ちカム従動子が押圧されて変位することにより、
従動部材が変位する。その際、ローラは、支軸を中心に
回転する。そして、ローラの回転において、ローラに対
する加工がなくても、潤滑油は、ローラの外側端面との
間の微小隙間は勿論のこと、ローラ間の、即ち各ローラ
の対向端面同士の間の微小隙間に供給保持され、そこか
らも潤滑油がローラの内周面と支軸の外周面との間に供
給されるので、両者間の潤滑は十分に行われる。従っ
て、ローラ及び支軸、特に支軸の摩損は抑止される。In the cam follower described above, the roller, that is, the cam follower is pressed and displaced as the cam rotates,
The driven member is displaced. At that time, the roller rotates around the support shaft. When the rollers are rotated, even if the rollers are not processed, the lubricating oil is not only a minute gap between the rollers and the outer end surface of the rollers, but also a minute gap between the rollers, that is, between the opposite end surfaces of the rollers. The lubricating oil is also supplied to and held between the inner peripheral surface of the roller and the outer peripheral surface of the support shaft, so that lubrication between the both is sufficiently performed. Therefore, wear of the roller and the support shaft, especially the support shaft, is suppressed.

【００１０】更にローラの対向端面に突起部が形成され
ていると、ローラの対向端面同士の間の微小隙間は確実
に維持される。従ってその微小隙間からローラの内周面
と支軸の外周面との間への潤滑油の供給が確保され、即
ちローラ及び支軸、特に支軸の摩損の抑止が確実なもの
となる。Further, when the protrusions are formed on the opposite end faces of the roller, the minute gap between the opposite end faces of the roller is surely maintained. Therefore, the supply of the lubricating oil from the minute gap between the inner peripheral surface of the roller and the outer peripheral surface of the support shaft is ensured, that is, the wear of the roller and the support shaft, particularly the support shaft, is surely suppressed.

【００１１】又、ローラがセラミックス製の場合には、
ローラの耐摩耗性が向上し、従動部材が軽量化されるの
で、応答性が向上する。そして、スリーブが外嵌された
場合には、スリーブによりセラミックス製のローラの破
損が抑止され、ローラが破損する事故が生じた場合で
も、スリーブによりその破片の散乱が防止される。If the roller is made of ceramics,
Since the wear resistance of the roller is improved and the driven member is reduced in weight, the responsiveness is improved. When the sleeve is fitted over the sleeve, the sleeve prevents the ceramic roller from being damaged, and the sleeve prevents scattering of the broken pieces even when the roller is damaged.

【００１２】そして、温度変化があっても、即ち金属製
の支軸及びスリーブとセラミックス製のローラとに膨張
差があっても、ローラ及びスリーブの回転において、支
軸の外周面とローラの内周面との間の微小隙間及びロー
ラの外周面とスリーブの内周面との間の微小隙間の和が
一定量に維持され得る。従って、それらの微小隙間にお
ける潤滑油の流通保持、即ち支軸の外周面・ローラの内
周面間の潤滑及びローラの外周面・スリーブの内周面間
の潤滑が維持される。Even if there is a temperature change, that is, even if there is a difference in expansion between the metal support shaft / sleeve and the ceramic roller, when the roller / sleeve rotates, the outer peripheral surface of the support shaft and the roller The sum of the minute gap between the peripheral surface and the minute gap between the outer peripheral surface of the roller and the inner peripheral surface of the sleeve can be maintained at a constant amount. Therefore, the lubricating oil is kept flowing in these minute gaps, that is, the lubrication between the outer peripheral surface of the support shaft and the inner peripheral surface of the roller and the lubrication between the outer peripheral surface of the roller and the inner peripheral surface of the sleeve are maintained.

【００１３】[0013]

【実施例】この発明の実施例におけるカム従動子を図面
に従って説明する。カム従動子としては、図４に示すエ
ンジンにおいてカムＣに接するロッカーアームＲのロー
ラ１を例示して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A cam follower according to an embodiment of the present invention will be described with reference to the drawings. As the cam follower, the roller 1 of the rocker arm R that contacts the cam C in the engine shown in FIG. 4 will be described as an example.

【００１４】図４において、金属からなるロッカーアー
ムＲの一端（右端）は、球面支点Ｐにより支承され、他
端（左端）には、タペット弁Ｖが取付けられている。そ
して、ロッカーアームＲの中央域には、カムＣと係合す
るローラ１を嵌装するローラ孔Ｈが形成され、ローラ孔
Ｈの両側のアーム部にかしめ等で両端支持されて取付け
られた金属製の支軸２には、ローラ１が回転自在に支持
されている。支軸２の滑動面は焼入れ等の熱処理が施さ
れている。In FIG. 4, one end (right end) of a rocker arm R made of metal is supported by a spherical fulcrum P, and a tappet valve V is attached to the other end (left end). A roller hole H into which the roller 1 that engages with the cam C is fitted is formed in the central region of the rocker arm R, and the metal is attached to both arm portions of the roller hole H while being supported at both ends by caulking or the like. A roller 1 is rotatably supported on a manufactured support shaft 2. The sliding surface of the support shaft 2 is subjected to heat treatment such as quenching.

【００１５】図１に示す第１実施例においては、中空の
ローラ１は、支軸２に回転自在に嵌合支承されて軸線方
向で二分割された分割ローラ１Ａ，１Ｂ、即ち隣接した
２個の分割ローラ１Ａ，１Ｂから構成され、そして、分
割ローラ１Ａ，１Ｂがローラ孔Ｈにおいて軸線方向に適
宜の遊びがあるようになっている。従って、ローラ孔Ｈ
の両側面と分割ローラ１Ａ，１Ｂの外側端面との間、分
割ローラ１Ａ，１Ｂの内側端面同士の間及び分割ローラ
１Ａ，１Ｂの内周面と支軸２の外周面との間には、適宜
の微小隙間３が形成され得る。In the first embodiment shown in FIG. 1, a hollow roller 1 is rotatably fitted and supported on a support shaft 2 and divided into two axially divided rollers 1A and 1B, that is, two adjacent rollers. The divided rollers 1A and 1B are provided so that the divided rollers 1A and 1B have an appropriate play in the roller hole H in the axial direction. Therefore, the roller hole H
Between the both side surfaces of the divided rollers 1A and 1B, the outer end surfaces of the divided rollers 1A and 1B, the inner end surfaces of the divided rollers 1A and 1B, and the inner peripheral surface of the divided rollers 1A and 1B and the outer peripheral surface of the support shaft 2. An appropriate minute gap 3 can be formed.

【００１６】分割ローラ１Ａ，１Ｂの材料は一般に金属
であるが、場合によっては、セラミックス材でもよい。
更に分割ローラ１Ａ，１Ｂの外周面及び内周面の両端縁
を面取りするか、円弧面に形成することが好ましい。そ
うすることにより、支軸２に対する摩耗影響が減少する
と共に、分割ローラ１Ａ，１Ｂの傾きにも対応し得る。The material of the split rollers 1A and 1B is generally metal, but in some cases, it may be a ceramic material.
Further, it is preferable to chamfer both end edges of the outer peripheral surface and the inner peripheral surface of the split rollers 1A and 1B, or to form them into an arc surface. By doing so, the influence of wear on the support shaft 2 is reduced, and the inclination of the split rollers 1A and 1B can be dealt with.

【００１７】図２に示す第２実施例においては、第１実
施例における２分割ローラ１Ａ，１Ｂの少なくとも一方
の分割ローラ１Ａ（１Ｂ）における他方の分割ローラ１
Ｂ（１Ａ）に対向する端面に適宜数の小突起４が形成さ
れている。図示の例においては、３個の小突起４，４，
４が円周等配に形成されている。そして、小突起４は、
対向する他方のローラの端面に当接し得て、両者の対向
端面同士の接触を抑止し、両分割ローラ１Ａ，１Ｂ間の
微小隙間３を維持する。In the second embodiment shown in FIG. 2, at least one of the two split rollers 1A and 1B in the first embodiment is divided into the other split roller 1A (1B).
An appropriate number of small protrusions 4 are formed on the end surface facing B (1A). In the illustrated example, the three small protrusions 4, 4,
4 are formed at equal intervals on the circumference. And the small protrusion 4 is
It can come into contact with the end faces of the other opposing roller to prevent contact between the opposing end faces of both rollers, and maintain the minute gap 3 between the split rollers 1A and 1B.

【００１８】図３に示す第３実施例においては、第１実
施例のローラ及び第２実施例のローラ１（分割ローラ１
Ａ，１Ｂ）がセラミックス製の場合であり、分割ローラ
１Ａ，１Ｂに跨って、それらの外周面に金属製の円筒形
スリーブ５が回転自在に嵌合支承され、そのスリーブ５
の外周面がカムＣに係合するように構成されている。そ
して、ローラ１の外周面とスリーブ５の内周面との間に
は適宜の微小隙間６が形成され得る。スリーブ５の少な
くとも内外周の滑動表面は、焼入れ等の硬化処理が施さ
れている。スリーブ５の厚さは、軽量化の点から強度を
損わない範囲で、ローラ１の厚さより薄い方が好まし
い。又、セラミックス製の分割ローラ１Ａ，１Ｂの両端
面は、潤滑油の保持を目的として焼結仕上げのままの粗
面としてもよい。In the third embodiment shown in FIG. 3, the roller of the first embodiment and the roller 1 of the second embodiment (split roller 1
A, 1B) is made of ceramics, and a cylindrical sleeve 5 made of metal is rotatably fitted and supported on the outer peripheral surfaces of the split rollers 1A, 1B.
The outer peripheral surface of is engaged with the cam C. An appropriate minute gap 6 may be formed between the outer peripheral surface of the roller 1 and the inner peripheral surface of the sleeve 5. At least the inner and outer peripheral sliding surfaces of the sleeve 5 are subjected to hardening treatment such as quenching. The thickness of the sleeve 5 is preferably thinner than that of the roller 1 within a range that does not impair strength in terms of weight reduction. Further, both end surfaces of the ceramic split rollers 1A and 1B may be roughened surfaces that have been sintered and finished for the purpose of retaining lubricating oil.

【００１９】上記の実施例のロッカーアームＲにおい
て、カムＣの回転に伴ってローラ１が押圧されて変位す
ることにより、ロッカーアームＲが支点を中心に揺動
し、それに応じてタペット弁Ｖが開閉作動される。その
際、ローラ１は、支軸２を中心に回転する。In the rocker arm R of the above-described embodiment, the roller 1 is pressed and displaced in accordance with the rotation of the cam C, whereby the rocker arm R swings around the fulcrum, and the tappet valve V accordingly moves. It is opened and closed. At that time, the roller 1 rotates around the support shaft 2.

【００２０】ローラ１の回転において、ローラ１に対す
る加工がなくても、潤滑油は、ローラ孔Ｈの両側面と分
割ローラ１Ａ，１Ｂの外側端面との間の微小隙間３は勿
論のこと、ローラ１の中央部、即ち分割ローラ１Ａ，１
Ｂの対向端面同士の間の微小隙間３に供給保持され、そ
こからも潤滑油がローラ１の内周面と支軸２の外周面と
の間に供給されるので、両者間の潤滑は十分に行われ
る。従って、ローラ１及び支軸２、特に支軸２の摩損は
抑止される。In the rotation of the roller 1, even if the roller 1 is not processed, the lubricating oil is not limited to the minute gap 3 between the both side surfaces of the roller hole H and the outer end surfaces of the divided rollers 1A and 1B. 1 central part, that is, the split rollers 1A, 1
The lubricating oil is supplied and held in the minute gap 3 between the opposite end surfaces of B, and the lubricating oil is also supplied from there between the inner peripheral surface of the roller 1 and the outer peripheral surface of the support shaft 2, so that the lubrication between the two is sufficient. To be done. Therefore, wear of the roller 1 and the support shaft 2, especially the support shaft 2, is suppressed.

【００２１】更に第２実施例の場合のように分割ローラ
１Ｂ（１Ａ）に対向する端面に小突起４が形成されてい
ると、分割ローラ１Ａ，１Ｂの対向端面同士の間の微小
隙間３は確実に維持される。従ってその微小隙間３から
ローラ１の内周面と支軸２の外周面との間への潤滑油の
供給が確保され、即ちローラ１及び支軸２、特に支軸２
の摩損の抑止が確実なものとなる。Further, as in the case of the second embodiment, when the small projection 4 is formed on the end surface facing the split roller 1B (1A), the minute gap 3 between the facing end surfaces of the split rollers 1A, 1B becomes small. Will be maintained reliably. Therefore, the supply of the lubricating oil from the minute gap 3 between the inner peripheral surface of the roller 1 and the outer peripheral surface of the support shaft 2 is ensured, that is, the roller 1 and the support shaft 2, especially the support shaft 2
Deterrence of wear and tear on the will be ensured.

【００２２】又、分割ローラ１Ａ，１Ｂがセラミックス
製の場合には、ローラ１の耐摩耗性が向上し、タペット
弁のクリアランス調整が不用となる。そして、装置が軽
量化されるので、エンジンの応答性や燃料消費性能が向
上する。そして、第３実施例の場合には、外嵌されたス
リーブ４によりセラミックス製の分割ローラ１Ａ，１Ｂ
の破損が抑止され、分割ローラ１Ａ，１Ｂが破損する事
故が生じた場合でも、スリーブ４によりその破片散乱の
危険が防止される。When the split rollers 1A and 1B are made of ceramics, the wear resistance of the roller 1 is improved and the clearance adjustment of the tappet valve becomes unnecessary. Since the device is lightened, the responsiveness of the engine and the fuel consumption performance are improved. Further, in the case of the third embodiment, the divided rollers 1A and 1B made of ceramics by the sleeve 4 fitted on the outside.
Even if an accident occurs in which the split rollers 1A, 1B are damaged, the sleeve 4 prevents the risk of scattering the fragments.

【００２３】そして、エンジン内の温度変化があって
も、即ち支軸２、ローラ１及びスリーブ４の膨張差があ
っても、ローラ１及びスリーブ４の回転において、支軸
２の外周面・ローラ１の内周面間の微小隙間３とローラ
１の外周面・スリーブ５の内周面間の微小隙間６との和
が一定量に維持され得る。従って、微小隙間３及び微小
隙間６における潤滑油の流通保持、即ち支軸２の外周面
・ローラ１の内周面間の潤滑及びローラ１の外周面・ス
リーブ５の内周面間の潤滑が維持される。Even if there is a temperature change in the engine, that is, there is a difference in expansion between the support shaft 2, the roller 1 and the sleeve 4, when the roller 1 and the sleeve 4 rotate, the outer peripheral surface of the support shaft 2 and the roller 4 rotate. The sum of the minute gap 3 between the inner peripheral surfaces of the roller 1 and the minute gap 6 between the outer peripheral surface of the roller 1 and the inner peripheral surface of the sleeve 5 can be maintained at a constant amount. Therefore, the lubricating oil is kept flowing in the minute gaps 3 and 6, that is, the lubrication between the outer peripheral surface of the support shaft 2 and the inner peripheral surface of the roller 1 and the lubrication between the outer peripheral surface of the roller 1 and the inner peripheral surface of the sleeve 5. Maintained.

【００２４】[0024]

【発明の効果】この発明のカム従動子においては、ロー
ラを軸線方向で分割するだけで、面倒な粗面加工を施こ
す必要がない上、ローラの内周面と支軸の外周面との間
に対する潤滑油の十分な供給・保持を実現し、両者間の
潤滑は十分に行われ、延いては、両者、特に支軸の摩耗
が抑止される。According to the cam follower of the present invention, it is not necessary to perform a troublesome roughening process only by dividing the roller in the axial direction, and the inner peripheral surface of the roller and the outer peripheral surface of the support shaft are separated from each other. Sufficient supply / holding of the lubricating oil to / from the space is realized, the lubrication between the two is sufficiently performed, and the wear of both, especially the spindle is suppressed.

【００２５】しかも、格別の粗面加工が不要で、十分な
潤滑が行われるので、支軸の摩耗の心配もなく、ローラ
の耐摩耗性の向上によるカム従動子の精度維持や、ロー
ラの軽量化によるカム従動子の応答性の向上というよう
な多くの利点があるセラミックス製のローラを用いるこ
とができる。そして、スリーブの外嵌の場合には、更に
セラミックス製のローラの破損が抑止され、ローラの破
損事故時における破片散乱の危険が防止される。Moreover, since no special rough surface processing is required and sufficient lubrication is carried out, there is no fear of wear of the support shaft, the accuracy of the cam follower is maintained by improving the wear resistance of the roller, and the weight of the roller is light. It is possible to use a roller made of ceramics, which has many advantages such as improvement in responsiveness of the cam follower due to the use of a roller. When the sleeve is externally fitted, the ceramic roller is further prevented from being damaged, and the risk of scattering of debris when the roller is damaged is prevented.

【図面の簡単な説明】[Brief description of drawings]

【図１】この発明の第１実施例におけるエンジンのロッ
カーアームのローラの断面図である。FIG. 1 is a sectional view of a roller of a rocker arm of an engine according to a first embodiment of the present invention.

【図２】この発明の第２実施例におけるエンジンのロッ
カーアームのローラの断面図である。FIG. 2 is a sectional view of a roller of a rocker arm of an engine according to a second embodiment of the present invention.

【図３】この発明の第３実施例におけるエンジンのロッ
カーアームの分割ローラの斜視図である。FIG. 3 is a perspective view of a split roller of a rocker arm of an engine according to a third embodiment of the present invention.

【図４】エンジンのロッカーアームの部分断面図であ
る。FIG. 4 is a partial cross-sectional view of a rocker arm of the engine.

【図５】従来の技術におけるエンジンのロッカーアーム
のローラの断面図である。FIG. 5 is a sectional view of a roller of a rocker arm of an engine according to a conventional technique.

【符号の説明】[Explanation of symbols]

Ｒ ロッカーアーム Ｐ 球面支点 Ｖ タペット弁 Ｃ カム Ｈ ローラ孔 １ ローラ １Ａ，１Ｂ 分割ローラ ２ 支軸 ３，６ 微小隙間 ４ 小突起 ５ スリーブ R Rocker arm P Spherical fulcrum V Tappet valve C Cam H Roller hole 1 Roller 1A, 1B Divided roller 2 Support shaft 3,6 Micro gap 4 Small protrusion 5 Sleeve

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 従動部材の金属製の支軸に軸線方向にお
いて微小隙間を形成し得るように複数に分割され、且つ
カムに係合するローラが回転自在に嵌合支承されている
カム従動子。1. A cam follower in which a metal supporting shaft of a driven member is divided into a plurality of parts so as to form a minute gap in the axial direction, and a roller engaging with the cam is rotatably fitted and supported. . 【請求項２】 ローラの対向端面の少なくとも一方に突
起部が形成されている請求項１に記載のカム従動子。2. The cam follower according to claim 1, wherein a projection is formed on at least one of the opposing end faces of the roller. 【請求項３】 ローラがセラミックス製である請求項１
又は請求項２に記載のカム従動子。3. The roller is made of ceramics.
Alternatively, the cam follower according to claim 2. 【請求項４】 ローラの外周面にカムに係合する金属製
のスリーブが回転自在に嵌合されている請求項３に記載
のカム従動子。4. The cam follower according to claim 3, wherein a metal sleeve engaging with the cam is rotatably fitted to the outer peripheral surface of the roller.
JP5142502A 1993-05-24 1993-05-24 Cam follower Pending JPH06331003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5142502A JPH06331003A (en) 1993-05-24 1993-05-24 Cam follower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5142502A JPH06331003A (en) 1993-05-24 1993-05-24 Cam follower

Publications (1)

Publication Number Publication Date
JPH06331003A true JPH06331003A (en) 1994-11-29

Family

ID=15316837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5142502A Pending JPH06331003A (en) 1993-05-24 1993-05-24 Cam follower

Country Status (1)

Country Link
JP (1) JPH06331003A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011111418A1 (en) * 2010-03-12 2011-09-15 日本精工株式会社 Tappet roller bearing
WO2017028918A1 (en) * 2015-08-19 2017-02-23 Volvo Truck Corporation A variable valve actuation mechanism, an internal combustion engine, and a vehicle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011111418A1 (en) * 2010-03-12 2011-09-15 日本精工株式会社 Tappet roller bearing
EP2546480A1 (en) * 2010-03-12 2013-01-16 NSK Ltd. Tappet roller bearing
EP2546480A4 (en) * 2010-03-12 2014-06-25 Nsk Ltd Tappet roller bearing
WO2017028918A1 (en) * 2015-08-19 2017-02-23 Volvo Truck Corporation A variable valve actuation mechanism, an internal combustion engine, and a vehicle
CN107923268A (en) * 2015-08-19 2018-04-17 沃尔沃卡车集团 Variable valve actuation mechanism, explosive motor and vehicle
EP3337960B1 (en) 2015-08-19 2019-11-20 Volvo Truck Corporation A variable valve actuation mechanism, an internal combustion engine, and a vehicle
US10648377B2 (en) 2015-08-19 2020-05-12 Volvo Truck Corporation Variable valve actuation mechanism, an internal combustion engine, and a vehicle
CN107923268B (en) * 2015-08-19 2020-10-20 沃尔沃卡车集团 Variable valve actuating mechanism, internal combustion engine and vehicle

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