WO1985000864A1 - Cam shaft - Google Patents

Cam shaft Download PDF

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Publication number
WO1985000864A1
WO1985000864A1 PCT/JP1984/000124 JP8400124W WO8500864A1 WO 1985000864 A1 WO1985000864 A1 WO 1985000864A1 JP 8400124 W JP8400124 W JP 8400124W WO 8500864 A1 WO8500864 A1 WO 8500864A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
cam
shaft
oil hole
cam lobe
Prior art date
Application number
PCT/JP1984/000124
Other languages
French (fr)
Japanese (ja)
Inventor
Masaaki Yamaji
Osamu Hirakawa
Shunsuke Takeguchi
Original Assignee
Nippon Piston Ring 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 Nippon Piston Ring Co., Ltd. filed Critical Nippon Piston Ring Co., Ltd.
Priority to GB08506985A priority Critical patent/GB2153477A/en
Publication of WO1985000864A1 publication Critical patent/WO1985000864A1/en

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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
    • F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02—Single-track cams for single-revolution cycles; Camshafts with such cams
    • F16H53/025—Single-track cams for single-revolution cycles; Camshafts with such cams characterised by their construction, e.g. assembling or manufacturing features
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0475—Hollow camshafts

Definitions

  • Camshaft In the present invention, components such as cam lobes, journals, and gears are separately manufactured using materials suitable for each application, and thus, they are made of steel pipe.
  • the present invention relates to the improvement of a built-in camshaft for an internal combustion engine, which is assembled to a shaft member. Background art
  • the desired oil amount is supplied to the surface of the component without blocking the oil hole.
  • Takishiaki is a member of the ⁇
  • one of the diameter of the oil hole of the steel pipe member and the diameter of the oil hole of the components such as cam lobes, journals, and gears is smaller than the other. Due to the large size, even if there is a slight error in the fitting of the projection and groove when positioning the components and the shaft member in the rotational direction, the two oil holes will not be dislocated and disconnected. In addition, a predetermined lubricating oil can be supplied to the component parts, and there is an excellent effect that the assemblability and productivity of the component parts can be improved.
  • Fig. 1 is a front view of the camshaft according to one embodiment of the present invention, in which main parts of the camshaft are cut away.
  • Fig. 2 is a cross-sectional view of the center.
  • the camshaft 10 is a stem 11 made of a penalty pipe and a sintered material fitted to the stem 11. It can not be formed together with the cam ⁇ -p 12.
  • a groove 11a is formed in the outer peripheral surface of this stem 11 in the axial direction, and the cam opening 12 is positioned on the inner peripheral surface of the cam lop 12 with respect to the stem 11 in position.
  • the protrusions 1 2 a to be inserted into ⁇ thin 1 1 a of this is Ru is formed.
  • the inner diameter is determined so that it fits into the stage 11 with some clearance in anticipation of the contraction of 2. Also, in the stem 11 and the cam lobe 12, oil holes 13 and 14 are drilled in the groove 11 a so that the lubrication holes 13 and 14 communicate with each other with the projection 12 a inserted into the groove 11 a. It is done. The diameter of the oil hole 14 of the force rod 12 is adjusted so that the lubricating oil circulating in the stem 11 passes through the oil hole 13 of the stem 11 and the diameter of the force hole 12 It is decided to lubricate the surface appropriately.
  • a special configuration of the present invention is the oil hole of the Stem 11
  • the diameter of 13 is larger than the diameter of the oil hole 14 of the cam rob 12.
  • the oil holes 13 of the stem 11 correspond to the oil holes 13 of the cam holes 12 of the cam lobes 12 generated after sintering due to the clearance. It is drilled as large as the deviation amount.
  • the camshaft 10 having such a configuration is provided with a cam Q
  • groove 11a serving as the reference for item 11
  • the intended oil hole 14 of the cam rob 12 is formed by the outer peripheral surface of the stem 11. It penetrates completely without being blocked and can supply an appropriate amount of lubricating oil to the surface of the cam lobe 12 during use.
  • the oil hole of the stem is larger than the oil hole of the cam opening, but the oil hole of the cam rob is larger than the oil hole of the stem. May be larger.
  • the oil hole should be bigger than the usual oil hole. Also, an example was shown in which a cam rob was fitted to a pendulum pipe stem, but not limited to a cam rob, such as journals and gears that require oil holes. The present invention can be similarly applied to the above.
  • a groove is formed on the stem and a protrusion is formed on the cam lobe.
  • a protrusion is formed on the stem and a groove is formed on the cam lobe.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Gears, Cams (AREA)

Abstract

A cam shaft (10) is composed of components such as a hollow shaft (11) and a cam lobe (12) or other component made of a sintered alloy. The hollow part of the shaft (11) defines a lubricating oil passage, and lubricating oils is supplied to the peripheral surface of the cam lobe (12) through radial oil holes (13), (14) provided in the shaft (11) and the cam lobe (12), respectively. Either the oil hole (13) in the shaft (11) or the oil hole (14) in the cam lobe (12) is formed so that it is larger than the other hole, to ensure that the oil holes (13), (14) will not be blocked even if there is a slight positioning error when the cam lobe (12), or other component, is secured directly to the shaft (11) by liquid-phase sintering.

Description

明 細 カ ム シ ャ フ ト 本発明は カ ム ロ ブ、 ジ ャ ー ナ ル、 ギア等の構成 部品が それぞれの用途 に適 した材料で別途製作 さ れ、 つ い でそれ ら が鋼管製の軸部材に組付け ら れ てな る 内燃璣閟用組立式カ ム シ ャ フ ト の 改良 に 関 す る 。 背景技術  Detailed Description Camshaft In the present invention, components such as cam lobes, journals, and gears are separately manufactured using materials suitable for each application, and thus, they are made of steel pipe. The present invention relates to the improvement of a built-in camshaft for an internal combustion engine, which is assembled to a shaft member. Background art
従来 、 こ.の 種 の カ ム シ ャ フ ト に お い て 、 カ ム 口 ブ、 ジ ャ ー ナ ル 、 ギ ア等の構成部品を鐧パ イ プ製 の軸部材に組付け る 場合には、 構成部品 の铀部材 に対す る 回転方向 の位置決めの手段 と し て、 轴部 材の外周面 に溝 ま た は突起を轴方向 に形成 し 、 構 成部品の内周 に前記溝 または突起に嵌挿す る 突起 ま たは溝を設けて組付けてい るが、 こ の場合 に構 成部品が焼結材であ る と 、 焼結時に構成部品に収 縮現象が発生 す る た め 、 組付け位置がずれ る 。 こ の た め軸部材及び構成部品に互いに連通す る 油穴を それぞれ穿設 し 、 軸部材内に潤滑油を循環 Conventionally, in the case of this type of camshaft, when a component such as a cam port, a journal, and a gear is assembled to a pipe shaft member. As a means for positioning the component in the rotational direction with respect to the member, a groove or a protrusion is formed in the outer surface of the member in the direction of the arrow, and the groove or the protrusion is formed in the inner periphery of the component. The projections or grooves are inserted and inserted into the components.However, in this case, if the components are made of a sintered material, the components will shrink during sintering. The mounting position is shifted. For this purpose, oil holes communicating with each other are formed in the shaft member and component parts, and lubricating oil is circulated in the shaft member.
し —し 構成 ¾0 ΠΠの表面 に上記油穴から潤滑油を供紿 Supply lubricating oil from the above oil hole to the surface of structure ¾0ΠΠ
する 場合に は、 軸部材の油穴の位置 と構成部品の If necessary, the position of the oil hole in the shaft member and the
由穴 の位置 と が正確 に 一致 し な けれ ばな ら な い  The position of the hole must exactly match
が、 焼結後に油穴位置が相互にずれて油穴が塞が However, after sintering, the oil holes are shifted from each other and the oil holes are closed.
ォレ 、 構成 ¾> απの表面 に所望の油量が得 られない お それが あ っ た。 こ の解決策と し て、 日 本公開特許 There was a possibility that the desired oil amount could not be obtained on the surface of the structure ¾> απ. The solution to this problem is a Japanese patent
公報昭 5 7 - 4 3 0 5 1 号に構成要件の油穴 と 轴 In the official gazette No. 57-4430501, oil holes and の
部材の油穴に ス プ リ ン グ ビンを挿入 し て焼結する こ と が提案 されてい る が、 轴部材に嵌合 し た多数 It has been proposed to insert a spring bottle into the oil hole of the member and sinter it.
の構成部品一つ一つの油穴に ビ ンを通すの -に手間 が掛か り すぎ る と い う 問題があ っ た。 There was a problem that it took too much time to pass a bin through each oil hole of each component.
太発明は、 上記問題点を解決する も の で 、 焼結  The invention of the present invention solves the above problems,
時に構成部品の位置が多少ずれても 、 油穴が塞が らずに 、 所望の油量が構成部品の表面に供紿 され Sometimes, even if the position of the component is slightly displaced, the desired oil amount is supplied to the surface of the component without blocking the oil hole.
る カ ム シ ャ フ ト を提供 し ょ う とする も の であ る 。 発明 の開示 This is an attempt to provide a camshaft. DISCLOSURE OF THE INVENTION
太癸明は、 鐧パ イ ブ製の铀部材と の铀部材  Takishiaki is a member of the 铀
Ο ΡΙ と は別 に形成 された カ ム ロ ブ、 ジ ャ ー ナ ル 、 ギ ア 等の構成部品 と に互い に連通する油穴が それぞれ 穿設 さ れた カ ム シ ャ フ ト におい て、 上記轴部材 に 穿設 された油穴 と 上記構成部品に穿設された油穴 の いずれか一方が他方 よ り も大き く 形成 された こ と を特镦 と す る 。 Ο ΡΙ In a camshaft in which oil holes communicating with components such as cam lobes, journals, gears, etc. formed separately from each other are formed, It is characterized in that either one of the oil hole drilled in the member and the oil hole drilled in the above-mentioned component is formed larger than the other.
本発明 に よれば、 鋼パ イ プ製の轴部材の油穴の 径 と カ ム ロ ブ、 ジ ャ ー ナル、 ギア等の構成部品 の 油穴 の 径 の い ずれ か一方 が他方 よ リ も 大 き いか ら 、 構成部品 と 軸部材の回転方向の位置決め時の 突起及び溝の嵌合性に 多少の誤差が生 じ て も 、 双 方の油穴がずれて不通に なる こ とがな く 、 所定の 潤滑油 を構成部品に給油可能であ り 、 し か も構成 部品の組付性、 生産性 も 向上 し得る優れた効果が あ る 。 図面の簡単な説明  According to the present invention, one of the diameter of the oil hole of the steel pipe member and the diameter of the oil hole of the components such as cam lobes, journals, and gears is smaller than the other. Due to the large size, even if there is a slight error in the fitting of the projection and groove when positioning the components and the shaft member in the rotational direction, the two oil holes will not be dislocated and disconnected. In addition, a predetermined lubricating oil can be supplied to the component parts, and there is an excellent effect that the assemblability and productivity of the component parts can be improved. BRIEF DESCRIPTION OF THE FIGURES
第 1 図は本考案の一実施例の カ ム シ ャ フ ト の 要 部を切欠い て示す正面図、  Fig. 1 is a front view of the camshaft according to one embodiment of the present invention, in which main parts of the camshaft are cut away.
第 2 図は そ の中央側断面図であ る。  Fig. 2 is a cross-sectional view of the center.
OMPI 発明 を実施する ための最良の形態 OMPI BEST MODE FOR CARRYING OUT THE INVENTION
次に *考案の一実施例を図面に基づい て説明す る  Next, an embodiment of the invention will be described with reference to the drawings.
図及び第 2 図 に お い て 、 カ ム シ ャ フ ト 1 0 は、 錮パ イ ブ製 の ス テ ム 1 1 と 、 こ の ス テ ム 1 1 に嵌合する焼結材で あ る カ ム π プ 1 2 と に ょ リ 耩 成 ざれ る。 こ の ス テ ム 1 1 の外周面には溝 1 1 a が軸方向 に形成 され 、 カ ム ロ プ 1 2 の内周面に ほ カ ム 口 ブ 1 2 の ステ ム 1 1 に対する位置決めの た め に 、 こ の ί薄 1 1 a に挿入する突起 1 2 a が形成 され る 。 カ ム α ブ 1 2 は、 焼結に よ る カ ム ロ ブ 1In FIG. 2 and FIG. 2, the camshaft 10 is a stem 11 made of a penalty pipe and a sintered material fitted to the stem 11. It can not be formed together with the cam π-p 12. A groove 11a is formed in the outer peripheral surface of this stem 11 in the axial direction, and the cam opening 12 is positioned on the inner peripheral surface of the cam lop 12 with respect to the stem 11 in position. in order, the protrusions 1 2 a to be inserted into ί thin 1 1 a of this is Ru is formed. Cam α 1 2
2 の 収縮を見込んで多少の ク リ ア ラ ン ス を も っ て ス テ ム 1 1 に 嵌合す る よ う に その内径が定め ら れ て い る 。 ま た ス テ ム 1 1 及びカ ム ロ ブ 1 2 に は 、 前記溝 1 1 a に突起 1 2 aが挿入 した状態で油穴 1 3 及び 1 4 が互い に連通する よ ラ に それぞれ穿 設され る 。 こ の 力 ム ロ ブ 1 2 の油穴 1 4 の径は 、 ス テ ム 1 1 内 を循環する潤滑油がス テ ム 1 1 の油 穴 1 3 ¾通 っ て力 ム ロ ブ 1 2 の表面を適度に潤滑 する よ う に決め られ る 。 本考案 の 特徵 あ る 構成 は 、 ス テ ム 1 1 の油穴 The inner diameter is determined so that it fits into the stage 11 with some clearance in anticipation of the contraction of 2. Also, in the stem 11 and the cam lobe 12, oil holes 13 and 14 are drilled in the groove 11 a so that the lubrication holes 13 and 14 communicate with each other with the projection 12 a inserted into the groove 11 a. It is done. The diameter of the oil hole 14 of the force rod 12 is adjusted so that the lubricating oil circulating in the stem 11 passes through the oil hole 13 of the stem 11 and the diameter of the force hole 12 It is decided to lubricate the surface appropriately. A special configuration of the present invention is the oil hole of the Stem 11
1 3 の径が カ ム ロ ブ 1 2 の油穴 1 4 よ り 大 き い径 に穿設 された と こ ろ に あ る。 すなわ ち ス テ ム 1 1 の油穴 1 3 は 、 前記 ク リ ア ラ ン ス に起因 し て焼結 後に生 じ る カ ム ロ ブ 1 2 の油穴 1 4 の油穴 1 3 に 対する 偏 リ 量 の分だけ大 き く 穿設される 。  The diameter of 13 is larger than the diameter of the oil hole 14 of the cam rob 12. In other words, the oil holes 13 of the stem 11 correspond to the oil holes 13 of the cam holes 12 of the cam lobes 12 generated after sintering due to the clearance. It is drilled as large as the deviation amount.
こ の よ う な構成の カ ム シ ャ フ ト 1 0 は 、 カ ム Q  The camshaft 10 having such a configuration is provided with a cam Q
ブ 1 2 が ス テ ム 1 1 に嵌合 した後で、 前記 ク リ ア  After the sleeve 12 has been fitted to the stem 11, the clear
ラ ン ス に起因 し て カ ム ロ ブ 1 2 の突起 1 2 a が ス  The protrusions 12a of the cam lobe 12 due to the
テ ム 1 1 の基準 と な る溝 1 1 a に対 し て多少偏 つ Slightly deviated from groove 11a serving as the reference for item 11
た状態 で焼結 され組付け られて も 、 ス テ ム 1 1 の Even if it is sintered and assembled in the
油穴 1 3 が こ の偏 り 畺 を包含する だけ大 き く 形成 されて い る た め、 カ ム ロ ブ 1 2 の所期の油穴 1 4 は ス テ ム 1 1 の外周 面 に よ り 塞がれず完全 に貫通 し 、 使用時に カ ム ロ ブ 1 2 の表面に適量の潤滑油 を供紿する こ と がで き る。 Since the oil hole 13 is formed so large as to include this deviation は, the intended oil hole 14 of the cam rob 12 is formed by the outer peripheral surface of the stem 11. It penetrates completely without being blocked and can supply an appropriate amount of lubricating oil to the surface of the cam lobe 12 during use.
上記実施例 に おい ては、 ス テ ム の油穴 を カ ム 口 ブの油穴 よ り も 大 き く し たが、 逆に カ ム ロ ブ の油 穴をス テ ム の油穴 よ り も 大き く して も よ い。 要す る に構成部品 と 轴部材の油穴のいずれか一方が通  In the above embodiment, the oil hole of the stem is larger than the oil hole of the cam opening, but the oil hole of the cam rob is larger than the oil hole of the stem. May be larger. In short, either the component or the oil hole of the
_ O PI 常の油穴 よ リ も大き ければよい。 又、 錮パ イ プ製 の ステ ム に、 カ ム ロ ブを嵌合する例を示 し たが、 カ ム ロ ブ に限 ら ず油穴を要する ジ ャ ー ナ ル 、 ギア 等の構成部品 に も 同様に本発明を適用す る こ と が で き る 。 _ O PI The oil hole should be bigger than the usual oil hole. Also, an example was shown in which a cam rob was fitted to a pendulum pipe stem, but not limited to a cam rob, such as journals and gears that require oil holes. The present invention can be similarly applied to the above.
さ ら に 、 上記例 で は ステ ム に溝を 、 カ ム ロ ブ に 突起を それぞれ形成 した例を示 したが、 ステ ム に 突起 を 、 カ ム ロ ブ に 溝 を そ れぞれ形成 し て も よ  Further, in the above example, a groove is formed on the stem and a protrusion is formed on the cam lobe. However, a protrusion is formed on the stem and a groove is formed on the cam lobe. Well

Claims

an 求 の 範 囲 range of request
1 ) 外周面 に溝 ま た は突起 （ 1 1 a ) が軸方向 に 形成 された鋼パ イ プ製の軸部材 （ 1 1 ) と 、 前記 軸部材 に嵌合 し上記溝または突起に嵌挿す る突起 ま たは溝 （ 1 2 a ) が内周面に形成 された構成部 品 （ 1 2 ) と を備え 、 上記铀部材及び上記構成部 品に互 い に連通す る 油穴 （ 1 3 , 1 4 ) がそれぞ れ半径方向 に 穿設 さ れた カ ム シ ャ フ 卜 に おい て 、 上記轴部材に穿設 さ れた油穴 （ 1 3 ) の径 と 上記 構成部品に穿設 され た油穴 （ 1 4 ) の径のいずれ か一方 を他方 よ り も 大 き く 形成 した こ と を特徴 と する カ ム シ ャ フ ト 。 1) A shaft member (11) made of a steel pipe having a groove or a protrusion (11a) formed on the outer peripheral surface in the axial direction, and fitted to the shaft member and fitted to the groove or the protrusion. And a component (12) in which a projection or groove (12a) formed on the inner peripheral surface is provided, and an oil hole (13) communicating with the above-mentioned member and the component is provided. , 14) are respectively drilled in the camshaft drilled in the radial direction, the diameter of the oil hole (13) drilled in the above-mentioned member, and the above-mentioned components. A camshaft characterized in that one of the diameters of the formed oil holes (14) is formed larger than the other.
PCT/JP1984/000124 1983-08-03 1984-03-23 Cam shaft WO1985000864A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08506985A GB2153477A (en) 1983-08-03 1984-03-23 Cam shaft

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58/120257U 1983-08-03
JP12025783U JPS6028651U (en) 1983-08-03 1983-08-03 camshaft

Publications (1)

Publication Number Publication Date
WO1985000864A1 true WO1985000864A1 (en) 1985-02-28

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Application Number Title Priority Date Filing Date
PCT/JP1984/000124 WO1985000864A1 (en) 1983-08-03 1984-03-23 Cam shaft

Country Status (4)

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JP (1) JPS6028651U (en)
DE (1) DE3490389T1 (en)
GB (1) GB2153477A (en)
WO (1) WO1985000864A1 (en)

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US7267088B2 (en) * 2002-12-05 2007-09-11 Toyota Jidosha Kabushiki Kaisha Valve-driving system of internal combustion engine
US11541487B2 (en) 2020-07-30 2023-01-03 Mahle International Gmbh Method for producing a channel in a shaft tube

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CH670137A5 (en) 1985-03-06 1989-05-12 Fischer Ag Georg METHOD FOR PRODUCING A COMPOSITE CAMSHAFT.
JP3163505B2 (en) * 1991-06-07 2001-05-08 日本ピストンリング株式会社 Mechanical element obtained by press-fitting a shaft into a fitting member and method for manufacturing the same
DE102013205129A1 (en) 2013-03-22 2014-09-25 Mahle International Gmbh Bearing frame or cylinder head cover of an internal combustion engine

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JPS4985445A (en) * 1972-12-21 1974-08-16
JPS5353782Y2 (en) * 1973-11-21 1978-12-22
JPS5610859A (en) * 1979-07-04 1981-02-03 Nippon Piston Ring Co Ltd Cam shaft
JPS5743051A (en) * 1980-08-27 1982-03-10 Toyota Motor Corp Manufacturing method for assembled cam shaft

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Publication number Priority date Publication date Assignee Title
JPS5353782U (en) * 1976-10-12 1978-05-09

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS4985445A (en) * 1972-12-21 1974-08-16
JPS5353782Y2 (en) * 1973-11-21 1978-12-22
JPS5610859A (en) * 1979-07-04 1981-02-03 Nippon Piston Ring Co Ltd Cam shaft
JPS5743051A (en) * 1980-08-27 1982-03-10 Toyota Motor Corp Manufacturing method for assembled cam shaft

Cited By (2)

* Cited by examiner, † Cited by third party
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US11541487B2 (en) 2020-07-30 2023-01-03 Mahle International Gmbh Method for producing a channel in a shaft tube

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DE3490389T1 (en) 1985-10-31
JPS6028651U (en) 1985-02-26
GB8506985D0 (en) 1985-04-24
GB2153477A (en) 1985-08-21

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