JP2001227621A - Bearing structure of transmission - Google Patents

Bearing structure of transmission

Info

Publication number
JP2001227621A
JP2001227621A JP2000035487A JP2000035487A JP2001227621A JP 2001227621 A JP2001227621 A JP 2001227621A JP 2000035487 A JP2000035487 A JP 2000035487A JP 2000035487 A JP2000035487 A JP 2000035487A JP 2001227621 A JP2001227621 A JP 2001227621A
Authority
JP
Japan
Prior art keywords
transmission
input shaft
roller
rotation
bearing structure
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
JP2000035487A
Other languages
Japanese (ja)
Inventor
Makoto Yamoto
真 矢本
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.)
UD Trucks Corp
Original Assignee
UD Trucks Corp
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 UD Trucks Corp filed Critical UD Trucks Corp
Priority to JP2000035487A priority Critical patent/JP2001227621A/en
Publication of JP2001227621A publication Critical patent/JP2001227621A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • 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
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
    • 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
    • F16C33/58—Raceways; Race rings
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To heighten lubricity of a pilot bearing in a bearing structure of a transmission. SOLUTION: In the bearing structure of the transmission including an input shaft to which rotation is inputted from an engine, a main shaft 4 to which rotation of the input shaft 1 is transmitted through a transmission gear, and the pilot bearing 10 rotatably supporting the end of the input shaft 2 at the end of the main shaft 4, a surface layer 18 for retaining a lubricating oil film is formed on at least one of an end face 16 of a roller 12 constituting the pilot bearing 10 and a collar surface 17 brought into sliding contact with the end face.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、変速機の軸受構造
の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a bearing structure of a transmission.

【０００２】[0002]

【従来の技術】一般に、車両に搭載される変速機は、エ
ンジンからの回転が入力されるインプットシャフトと、
インプットシャフトの回転が変速ギヤを介して伝えられ
るメインシャフトとが同軸上に配置され、インプットシ
ャフトの端部をメインシャフトの端部に回転可能に支持
するパイロットベアリングを備える。2. Description of the Related Art Generally, a transmission mounted on a vehicle includes an input shaft to which rotation from an engine is input,
A main shaft to which rotation of the input shaft is transmitted via a transmission gear is coaxially arranged, and a pilot bearing rotatably supports an end of the input shaft to an end of the main shaft.

【０００３】従来、この種の軸受構造として、例えば英
国特許ＧＢ２１２１１２０Ｂ号、特開平８−３３６６４
９号公報に開示されたものがある。Conventionally, as this type of bearing structure, for example, British Patent No. GB2121120B, Japanese Patent Application Laid-Open No. 8-33664.
There is one disclosed in Japanese Patent Application Laid-Open Publication No. 9-No.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の変速機に備えられるパイロットベアリングに
あっては、無負荷遊転時に各コロの端面が内輪のつば面
に不安定な接触状態で摺接するため、この摺接部に潤滑
油膜を保持することが難しいという問題点があった。However, in the pilot bearing provided in such a conventional transmission, the end face of each roller slides in an unstable contact state with the flange face of the inner ring during no-load idle rotation. Therefore, there is a problem that it is difficult to hold a lubricating oil film on the sliding contact portion.

【０００５】本発明は上記の問題点を鑑みてなされたも
のであり、変速機の軸受構造において、パイロットベア
リングの潤滑性を高めることを目的とする。The present invention has been made in view of the above problems, and has as its object to improve the lubricity of a pilot bearing in a transmission bearing structure.

【０００６】[0006]

【課題を解決するための手段】第１の発明は、原動機か
らの回転が入力されるインプットシャフトと、インプッ
トシャフトの回転が変速ギヤを介して伝えられるメイン
シャフトと、インプットシャフトの端部をメインシャフ
トの端部に回転可能に支持するパイロットベアリングと
を備える変速機の軸受構造に適用する。According to a first aspect of the present invention, an input shaft to which rotation from a prime mover is input, a main shaft to which rotation of the input shaft is transmitted via a transmission gear, and an end of the input shaft are mainly used. The present invention is applied to a bearing structure of a transmission including a pilot bearing rotatably supported at an end of a shaft.

【０００７】そして、パイロットベアリングを構成する
コロの端面とこれに摺接するつば面の少なくとも一方に
潤滑油膜を保持する表面層を形成するものとした。[0007] A surface layer for holding a lubricating oil film is formed on at least one of the end surface of the roller constituting the pilot bearing and the flange surface in sliding contact with the end surface.

【０００８】第２の発明は、第１の発明において、表面
層としてコロの表面にリン酸塩皮膜処理を施ものとし
た。According to a second aspect, in the first aspect, the surface of the roller is subjected to a phosphate film treatment as a surface layer.

【０００９】[0009]

【発明の作用および効果】第１の発明において、コロの
端面とつば面の摺接部は表面層を介して潤滑油膜が保持
される。これにより、パイロットベアリングは無負荷遊
転時に各コロの端面がつば面に不安定な接触状態で摺接
する運転状態でも、焼き付き等が生じることを防止でき
る。According to the first aspect of the present invention, the lubricating oil film is held at the sliding portion between the end surface of the roller and the flange surface via the surface layer. Thereby, even when the pilot bearing is in an operation state in which the end face of each roller slides on the collar surface in an unstable contact state during idle rotation with no load, seizure or the like can be prevented from occurring.

【００１０】第２の発明において、表面層はリン酸塩皮
膜によって表面粗さが適度に確保され、つば面との摺接
部に潤滑油膜を保持し、焼き付き等が生じることを防止
できる。In the second aspect of the present invention, the surface layer has an appropriate surface roughness by a phosphate film, and a lubricating oil film is held in a portion in sliding contact with the flange surface, so that seizure or the like can be prevented.

【００１１】[0011]

【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基づいて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.

【００１２】図１に示すように、車両に搭載される変速
機１は、インプットシャフト２とメインシャフト４が同
軸上に設けられる。図示しないエンジン（原動機）の回
転がインプットシャフト２の後端のメインドライブギヤ
５からカウンタシャフト３に伝えられ、カウンタシャフ
ト３からメインシャフト４上を空転する１速〜６速の各
変速ギヤに伝えられる。各変速ギヤの回転がシンクロメ
ッシュ機構を介して選択的にメインシャフト４に伝えら
れると、メインシャフト４の回転が図示しないプロペラ
シャフト等を介して車輪へと伝えられる。As shown in FIG. 1, a transmission 1 mounted on a vehicle has an input shaft 2 and a main shaft 4 provided coaxially. The rotation of an engine (motor) (not shown) is transmitted from the main drive gear 5 at the rear end of the input shaft 2 to the counter shaft 3, and transmitted from the counter shaft 3 to each of first to sixth speed gears that idle on the main shaft 4. Can be When the rotation of each transmission gear is selectively transmitted to the main shaft 4 via the synchromesh mechanism, the rotation of the main shaft 4 is transmitted to the wheels via a not-shown propeller shaft or the like.

【００１３】メインシャフト４はトランスミッションケ
ース５に対して一対の各ベアリング６，７，８を介して
支持される。The main shaft 4 is supported on the transmission case 5 via a pair of bearings 6, 7, 8.

【００１４】インプットシャフト２はトランスミッショ
ンケース５に対してベアリング９を介して支持されると
ともに、メインシャフト４に対してパイロットベアリン
グ１０を介して支持される。パイロットベアリング１０
はインプットシャフト２が後方（図１において左方向）
に移動しようとするスラスト力を支持する。The input shaft 2 is supported on the transmission case 5 via a bearing 9 and is supported on the main shaft 4 via a pilot bearing 10. Pilot bearing 10
Is the rear of the input shaft 2 (left direction in FIG. 1)
Support the thrust force trying to move.

【００１５】パイロットベアリング１０はメインシャフ
ト４の前端部に取り付けられる内輪１１と、インプット
シャフト２の後端部に一体形成される外輪１３と、内輪
１１と外輪１３の間で転動する多数の円錐コロ１２とを
備える。The pilot bearing 10 includes an inner race 11 attached to the front end of the main shaft 4, an outer race 13 integrally formed at the rear end of the input shaft 2, and a number of cones rolling between the inner race 11 and the outer race 13. And a roller 12.

【００１６】図２に示すように、各コロ１２はそれぞれ
の軸芯が共通の円錐面上に配置される。内輪１１は各コ
ロ１２の外周面１４に転接する円錐面状の軌道面１５
と、各コロ１２の端面１６に摺接する環状の大側部つば
面１７を有する。As shown in FIG. 2, each roller 12 has its axis centered on a common conical surface. The inner race 11 has a conical raceway surface 15 that rolls on the outer peripheral surface 14 of each roller 12.
And an annular large side flange surface 17 slidably in contact with the end surface 16 of each roller 12.

【００１７】ところで、パイロットベアリング１０は無
負荷遊転時に各コロ１２の端面１６が内輪１１のつば面
１７に対して押し付け力が弱いあるいは無いレベルの不
安定な接触状態となるため、この摺接部に潤滑油膜を保
持することが難しいという問題点があった。The pilot bearing 10 is in an unstable contact state in which the end face 16 of each roller 12 has a weak or no pressing force against the flange face 17 of the inner ring 11 during no-load idle rotation. There is a problem that it is difficult to hold the lubricating oil film in the portion.

【００１８】これに対処して、本発明は各コロ１２の端
面１６に潤滑油膜を保持する表面層１８を形成する。具
体的には、表面層１８としてコロ１２の全体にリン酸塩
皮膜処理を施す。In response to this, the present invention forms a surface layer 18 holding a lubricating oil film on the end face 16 of each roller 12. Specifically, the entire surface of the roller 12 as the surface layer 18 is subjected to a phosphate film treatment.

【００１９】表面層１８はリン酸塩皮膜によって表面粗
さが適度に確保され、内輪１１のつば面１７との摺接部
に潤滑油膜を保持する。これにより、パイロットベアリ
ング１０は無負荷遊転時に各コロ１２の端面１６が内輪
１１のつば面１７に不安定な接触状態で摺接する運転状
態でも、コロ１２の端面１６の摩擦係数を低く保って発
熱を抑えられ、焼き付き等が生じることを防止できる。The surface layer 18 has an appropriate surface roughness by a phosphate film, and holds a lubricating oil film at a portion in sliding contact with the flange surface 17 of the inner ring 11. As a result, the friction coefficient of the end face 16 of the roller 12 can be kept low even in an operation state in which the end face 16 of each roller 12 slides in an unstable contact state with the flange face 17 of the inner ring 11 during idle running with no load. Heat generation can be suppressed, and the occurrence of burn-in and the like can be prevented.

【００２０】他の実施の形態として、内輪１１のつば面
１７に潤滑油膜を保持する表面層として、リン酸塩皮膜
処理を施してもよい。この場合、内輪１１のつば面１７
の摩擦係数を低く保って発熱を抑えられ、焼き付き等が
生じることを防止できる。As another embodiment, a phosphate coating may be applied to the flange surface 17 of the inner race 11 as a surface layer for holding a lubricating oil film. In this case, the flange surface 17 of the inner ring 11
, The heat generation is suppressed, and the occurrence of seizure or the like can be prevented.

【００２１】本発明は上記の実施の形態に限定されず
に、その技術的な思想の範囲内において種々の変更がな
しうることは明白である。It is apparent that the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the technical idea.

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

【図１】本発明の実施の形態を示す変速機の断面図。FIG. 1 is a sectional view of a transmission showing an embodiment of the present invention.

【図２】同じくパイロットベアリングの断面図。FIG. 2 is a sectional view of the pilot bearing.

【図３】同じくパイロットベアリングの正面図。FIG. 3 is a front view of the pilot bearing.

【符号の説明】[Explanation of symbols]

１ 変速機 ２ インプットシャフト ４ メインシャフト １０ パイロットベアリング １１ 内輪 １２ コロ １６ 端面 １７ つば面 １８ 表面層 DESCRIPTION OF SYMBOLS 1 Transmission 2 Input shaft 4 Main shaft 10 Pilot bearing 11 Inner ring 12 Roller 16 End face 17 Collar face 18 Surface layer

フロントページの続き Ｆターム(参考） 3J063 AA01 AB02 AC06 BA01 BA10 BA11 CA01 CB41 CB43 CB60 CD02 CD03 XA33 XC10 XD03 XD73 3J101 AA16 AA25 AA54 AA62 BA05 BA10 BA57 BA70 CA15 EA78 FA32 FA33 GA11 Continued on the front page F term (reference) 3J063 AA01 AB02 AC06 BA01 BA10 BA11 CA01 CB41 CB43 CB60 CD02 CD03 XA33 XC10 XD03 XD73 3J101 AA16 AA25 AA54 AA62 BA05 BA10 BA57 BA70 CA15 EA78 FA32 FA33 GA11

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】原動機からの回転が入力されるインプット
シャフトと、 前記インプットシャフトの回転が変速ギヤを介して伝え
られるメインシャフトと、 前記インプットシャフトの端部を前記メインシャフトの
端部に回転可能に支持するパイロットベアリングと、 を備える変速機の軸受構造において、 前記パイロットベアリングを構成するコロの端面とこれ
に摺接するつば面の少なくとも一方に潤滑油膜を保持す
る表面層を形成したことを特徴とする変速機の軸受構
造。An input shaft to which rotation from a motor is input; a main shaft to which rotation of the input shaft is transmitted via a transmission gear; and an end of the input shaft rotatable to an end of the main shaft. And a bearing structure for a transmission, comprising: a surface layer that holds a lubricating oil film on at least one of an end surface of a roller constituting the pilot bearing and a flange surface that slides on the end surface of the roller. Transmission bearing structure. 【請求項２】前記表面層として前記コロの表面にリン酸
塩皮膜処理を施したことを特徴とする請求項１に記載の
変速機の軸受構造。2. The bearing structure for a transmission according to claim 1, wherein a phosphate coating is applied to the surface of the roller as the surface layer.
JP2000035487A 2000-02-14 2000-02-14 Bearing structure of transmission Pending JP2001227621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000035487A JP2001227621A (en) 2000-02-14 2000-02-14 Bearing structure of transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000035487A JP2001227621A (en) 2000-02-14 2000-02-14 Bearing structure of transmission

Publications (1)

Publication Number Publication Date
JP2001227621A true JP2001227621A (en) 2001-08-24

Family

ID=18559678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000035487A Pending JP2001227621A (en) 2000-02-14 2000-02-14 Bearing structure of transmission

Country Status (1)

Country Link
JP (1) JP2001227621A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008069133A1 (en) * 2006-12-04 2008-06-12 Ntn Corporation Rolling member and method of processing of rolling contact surface
JP2013213577A (en) * 2012-03-09 2013-10-17 Nsk Ltd Sliding member, needle roller bearing and metal surface treatment method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008069133A1 (en) * 2006-12-04 2008-06-12 Ntn Corporation Rolling member and method of processing of rolling contact surface
JP2013213577A (en) * 2012-03-09 2013-10-17 Nsk Ltd Sliding member, needle roller bearing and metal surface treatment method

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