JPH05231500A - Chain sprocket - Google Patents

Chain sprocket

Info

Publication number
JPH05231500A
JPH05231500A JP4036335A JP3633592A JPH05231500A JP H05231500 A JPH05231500 A JP H05231500A JP 4036335 A JP4036335 A JP 4036335A JP 3633592 A JP3633592 A JP 3633592A JP H05231500 A JPH05231500 A JP H05231500A
Authority
JP
Japan
Prior art keywords
chain
roller
tooth
circular arc
radius
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.)
Granted
Application number
JP4036335A
Other languages
Japanese (ja)
Other versions
JP2890955B2 (en
Inventor
Sadao Miki
貞雄 三木
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP3633592A priority Critical patent/JP2890955B2/en
Publication of JPH05231500A publication Critical patent/JPH05231500A/en
Application granted granted Critical
Publication of JP2890955B2 publication Critical patent/JP2890955B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To prevent hammering noise between a chain and a sprocket by forming circular arc parts, curved in circular arc shape around the center of adjacent tooth bottom parts as the center, at tooth faces positioned on the wound-in side of the chain, and setting the radius-of-curvature of this curcular arc part into the value obtained by deducting the radius-of-gyration of a roller from the pitch of the chain. CONSTITUTION:A circular arc part 4 of the same circular arc as the locus of a roller 11 is formed at the tooth 2 of a sprocket 1, and the roller 11 rolls in contact on this circular arc part 4 in the process of the roller 11 of a chain 10 being accommodated into a tooth bottom part 3. That is, the circular arc part 4 is formed along the circular arc shape of radius R4 around the center O of the tooth bottom part 3 as the center. This radius of curvature R4 is to be of the value obtained by deducting the radius-of- gyration R3 of the roller 11 from the pitch P10 of the chain 10. The circular arc part 4 is formed within a range of an angle theta around the center O of the adjacent tooth bottom part 3 with the tooth 2 in between. Since the radius-of-oscillation of a roller 11b and the radius-of-curvature of the circular arc part 4 coincide with each other, the roller 11b is accommodated into the tooth bottom part 3 while rolling in contact with the circular arc part 4 so as to ease a shock.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は、チェーン用スプロケッ
ト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 improved chain sprocket.

【０００２】[0002]

【従来の技術】チェーンがスプロケットと噛合うときに
発生する打音を低減するため、従来例えば実開平２−６
７１４６号公報に開示されたものでは、スプロケットの
ピッチをチェーンのピッチよりわずかに短く形成し、ス
プロケットのチェーン巻き込み側でチェーンのローラが
歯底部より上方の歯面に係合するようになっている。2. Description of the Related Art In order to reduce a hitting sound generated when a chain is engaged with a sprocket, a conventional method, for example, an actual flat blade 2-6.
In the one disclosed in Japanese Patent No. 7146, the pitch of the sprocket is formed slightly shorter than the pitch of the chain, and the roller of the chain engages with the tooth surface above the tooth bottom on the winding side of the chain of the sprocket. ..

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな従来装置にあっては、スプロケットのピッチとチェ
ーンのピッチが異なるため、チェーンの噛合い状態にお
いて、スプロケットの歯底部に収まったチェーンのロー
ラが安定せず、偏磨耗の原因になる可能性があった。However, in such a conventional device, since the pitch of the sprocket and the pitch of the chain are different, when the chain is engaged, the roller of the chain fitted in the bottom of the teeth of the sprocket is It was not stable and could cause uneven wear.

【０００４】本発明は上記の問題点に着目し、チェーン
がスプロケットと噛合うときに発生する打音をスプロケ
ットの歯形を改良することにより低減することを目的と
する。The present invention has been made in view of the above problems, and it is an object of the present invention to reduce the hitting sound generated when a chain meshes with a sprocket by improving the tooth profile of the sprocket.

【０００５】[0005]

【課題を解決するための手段】本発明は、スプロケット
の歯のピッチをチェーンのピッチと略同一に設定し、歯
の間にチェーンのローラが収まる歯底部を形成したチェ
ーン用スプロケットにおいて、少なくともチェーンの巻
き込み側に位置する歯面に、隣り合う歯底部の中心点を
中心とする円弧形に湾曲する円弧部を形成し、この円弧
部の曲率半径をチェーンのピッチからローラの回転半径
を差し引いた値とする。SUMMARY OF THE INVENTION The present invention is directed to a chain sprocket in which the tooth pitch of the sprocket is set to be substantially the same as the chain pitch, and tooth bottoms for accommodating the chain rollers are formed between the teeth. On the tooth surface located on the winding side of, form an arcuate part that curves in an arcuate shape centered on the center point of the adjacent tooth bottom part, and subtract the radius of curvature of this arcuate part from the chain radius Value.

【０００６】また、円弧部と歯底部とは段差なく滑らか
に連続させる。Further, the arcuate portion and the tooth bottom portion are smoothly connected without a step.

【０００７】[0007]

【作用】スプロケットの回転時、先行するローラが歯底
部に収まるのに伴って、次に噛合うローラが歯底部の中
心点を中心として揺動し、このときローラの揺動半径と
円弧部の曲率半径が一致しているため、ローラは円弧部
に転接しながら歯底部に収まる。ローラを転がり接触さ
せずにいきなり歯底部に衝突させるものに比べて、ロー
ラが円弧部に転接する過程でローラの運動エネルギーが
緩められることにより、ローラが歯底部に収まるときに
生じる衝撃を緩和し、スプロケットとチェーンの間で打
音が発生することを防止する。When the sprocket rotates, the next meshing roller oscillates around the center point of the tooth bottom as the preceding roller fits in the tooth bottom. Since the radii of curvature are the same, the roller fits on the bottom of the tooth while rolling on the arc portion. Compared to a roller that collides with the root of the tooth suddenly without rolling contact, the kinetic energy of the roller is relaxed in the process of rolling contact with the circular arc, which reduces the impact that occurs when the roller fits into the root of the tooth. , Prevents hammering between the sprocket and chain.

【０００８】また、円弧部と歯底部とは段差なく滑らか
に連続させることにより、ローラが円弧部から歯底部に
円滑に案内され、振動や衝撃の発生を防げる。Further, by smoothly connecting the arcuate portion and the tooth bottom portion without a step, the roller is smoothly guided from the arcuate portion to the tooth bottom portion, and vibration and impact can be prevented.

【０００９】[0009]

【実施例】以下、本発明の実施例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.

【００１０】図１に示すように、スプロケット１は歯２
がピッチ円に沿って所定のピッチＰ1で並び、歯２の間
に歯底部３が形成されている。一方、スプロケット１に
噛合うチェーン１０はピン結合される各プレート１２間
に筒形の各ローラ１１を回転自在に備え、このローラ１
１がスプロケット１の歯底部３に収まるようになってい
る。なお、チェーン１０のピッチＰ10とスプロケット１
のピッチＰ1と同一値で形成される。As shown in FIG. 1, the sprocket 1 has teeth 2
Are arranged at a predetermined pitch P 1 along the pitch circle, and a tooth bottom portion 3 is formed between the teeth 2. On the other hand, the chain 10 that meshes with the sprocket 1 is provided with cylindrical rollers 11 rotatably between the plates 12 that are pin-connected.
1 is set in the tooth bottom portion 3 of the sprocket 1. The pitch P 10 of the chain 10 and the sprocket 1
Is formed with the same value as the pitch P 1 .

【００１１】スプロケット１の歯２にはローラ１１の軌
跡と同一の円弧で形成される円弧部４が形成され、チェ
ーン１０のローラ１１が歯底部３に収まる過程でローラ
１１がこの円弧部４上を転接するようになっている。The teeth 2 of the sprocket 1 are formed with an arcuate portion 4 formed in the same arc as the locus of the roller 11, and the roller 11 is placed on the arcuate portion 4 while the roller 11 of the chain 10 fits in the tooth bottom portion 3. Is to be transferred.

【００１２】歯底部３はピッチ円上に位置するとともに
隣り合う歯２間の中央に位置する点Ｏを中心とし、ロー
ラ１１と同一半径Ｒ3の円弧に沿って形成される。な
お、歯底部３の断面形は円弧形に限られることなく、歯
底部３に収まったローラ１１の軸芯がピッチ円上に位置
するような凹形状に形成すれば良い。The tooth bottom portion 3 is formed along a circular arc having the same radius R 3 as that of the roller 11, centered on a point O located on the pitch circle and between the adjacent teeth 2. The cross-sectional shape of the tooth bottom portion 3 is not limited to the arc shape, and may be formed in a concave shape so that the axis of the roller 11 accommodated in the tooth bottom portion 3 is located on the pitch circle.

【００１３】円弧部４は歯底部３の中心点Ｏを中心と
し、半径Ｒ4の円弧形に沿って形成される。この曲率半
径Ｒ4はチェーン１０のピッチＰ10からローラ１１の回
転半径Ｒ3を差し引いた値とする。すなわち、Ｒ4＝Ｐ10
−Ｒ3の関係となっている。The arcuate portion 4 is formed along an arcuate shape having a radius R 4 with the center point O of the tooth bottom portion 3 as the center. The radius of curvature R 4 is a value obtained by subtracting the radius of rotation R 3 of the roller 11 from the pitch P 10 of the chain 10. That is, R 4 = P 10
-R 3 relationship.

【００１４】円弧部４はその歯２を挟んで隣りの歯底部
３の中心点Ｏを中心として角度θの範囲で形成され、円
弧部４と歯底部３は段差なく連続している。すなわち、
円弧部４と歯底部３は互いの交点で同一接線を持ってい
る。The circular arc portion 4 is formed within the range of an angle θ about the center point O of the adjacent tooth bottom portion 3 with the tooth 2 interposed therebetween, and the circular arc portion 4 and the tooth bottom portion 3 are continuous without a step. That is,
The arcuate portion 4 and the tooth bottom portion 3 have the same tangent line at their intersections.

【００１５】この実施例では、チェーン１０の巻き込み
側に位置する歯表と外れ側に位置する歯裏は対称的に形
成されているが、スプロケット１が常時同一回転方向に
回転するならば、円弧部４はチェーン１０の差し込み側
のみに形成しても良い。In this embodiment, the tooth surface located on the winding side of the chain 10 and the tooth back located on the disengagement side are formed symmetrically, but if the sprocket 1 always rotates in the same rotation direction, an arc is formed. The portion 4 may be formed only on the insertion side of the chain 10.

【００１６】また、図２にも示すように、実際には歯２
の先端角部には円弧部４から連続する面取り部５が所定
の曲率半径で形成されている。Further, as shown in FIG. 2, the tooth 2 is actually
A chamfered portion 5 continuous from the circular arc portion 4 is formed at a corner portion of the tip with a predetermined radius of curvature.

【００１７】次に、作用について説明する。Next, the operation will be described.

【００１８】スプロケット１がチェーン１０と噛合いな
がら図中反時計回り方向に回転するとき、図１におい
て、先行するローラ１１ａが歯底部３ａに収まるのに伴
って、次に噛合うローラ１１ｂは既に歯底部３ａに収ま
ったローラ１１ａを中心、すなわち歯底部３ａの中心点
Ｏを中心として揺動する。このとき、ローラ１１ｂの揺
動半径と円弧部４の曲率半径は一致しているため、ロー
ラ１１ｂは円弧部４に転接しながら歯底部３に収まる。
つまり、ローラ１１ｂが円弧部４に対して角度θの範囲
にわたり転がり接触する過程でローラ１１ｂの運動エネ
ルギーが緩められることにより、転がり接触せずにいき
なりローラ１１が歯底部３に衝突するものに比べ、ロー
ラ１１ｂが歯底部３に収まるときに生じる衝撃を緩和
し、スプロケット１とチェーン１０の間で打音が発生す
ることを防止する。When the sprocket 1 rotates counterclockwise in the drawing while meshing with the chain 10, as the preceding roller 11a fits in the tooth bottom portion 3a in FIG. The roller 11a set in the tooth bottom portion 3a is swung about, that is, the center point O of the tooth bottom portion 3a is swung. At this time, since the swinging radius of the roller 11b and the radius of curvature of the arc portion 4 are the same, the roller 11b is set in the tooth bottom portion 3 while rollingly contacting the arc portion 4.
That is, the kinetic energy of the roller 11b is relaxed in the process in which the roller 11b makes rolling contact with the arc portion 4 over an angle θ range, so that the roller 11 suddenly collides with the tooth bottom portion 3 without making rolling contact. , The impact generated when the roller 11b fits in the tooth bottom portion 3 is mitigated, and the hammering sound between the sprocket 1 and the chain 10 is prevented.

【００１９】そして、円弧部４と歯底部３の連続部は同
一接線上にあり、滑らかに連続しているため、ローラ１
１の移動はスムーズに行われ、振動や衝撃の発生を防げ
る。The continuous portion of the arc portion 4 and the tooth bottom portion 3 are on the same tangent line and are smoothly continuous, so that the roller 1
The movement of 1 is performed smoothly and it is possible to prevent the occurrence of vibration and shock.

【００２０】また、チェーン１０のピッチＰ10とスプロ
ケット１のピッチＰ1とは同一値で形成されているた
め、噛合い状態にあるスプロケット１の歯底部３に収ま
ったチェーン１０のローラ１１が安定し、偏磨耗を防止
する。Further, since the pitch P 1 of the pitch P 10 and the sprocket 1 of the chain 10 are formed of the same value, the roller 11 of the chain 10 which fits to the tooth bottom portion 3 of the sprocket 1 in a meshing state is stabilized To prevent uneven wear.

【００２１】[0021]

【発明の効果】以上説明したように本発明は、チェーン
用スプロケットの歯形において、隣り合う歯底部の中心
点を中心とする円弧形に湾曲する円弧部を形成し、この
円弧部の曲率半径をチェーンのピッチからローラの回転
半径を差し引いた値としたため、チェーンの巻き込み時
にチェーンのローラがスプロケットの円弧部に転接する
ことにより、ローラの運動エネルギーを減速し、ローラ
が歯底部に衝突する速度を緩和し、チェーンとスプロケ
ットの間で打音が発生することを防止できる。As described above, according to the present invention, in the tooth profile of the chain sprocket, an arc portion curved in an arc shape centering on the center point of the adjacent tooth bottom is formed, and the radius of curvature of this arc portion is formed. Is the value obtained by subtracting the radius of gyration of the roller from the pitch of the chain.Therefore, when the chain roller rolls into contact with the arc part of the sprocket, the kinetic energy of the roller is decelerated and the speed at which the roller collides with the tooth bottom. Can be mitigated, and a tapping noise can be prevented from being generated between the chain and the sprocket.

【００２２】また、円弧部と歯底部とは段差なく滑らか
に連続させることにより、ローラが円弧部から歯底部に
円滑に案内され、振動や衝撃の発生を防げる。Further, by smoothly connecting the arcuate portion and the tooth bottom portion without a step, the roller is smoothly guided from the arcuate portion to the tooth root portion, and vibration and impact can be prevented.

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

【図１】本発明の実施例を示す要部正面図である。FIG. 1 is a front view of an essential part showing an embodiment of the present invention.

【図２】同じく正面図である。FIG. 2 is a front view of the same.

【符号の説明】[Explanation of symbols]

１ スプロケット ２ 歯 ３ 歯底部 ４ 円弧部 １０ チェーン １１ ローラ 1 Sprocket 2 Teeth 3 Bottom part 4 Arc part 10 Chain 11 Roller

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 スプロケットの歯のピッチをチェーンの
ピッチと略同一に設定し、歯の間にチェーンのローラが
収まる歯底部を形成したチェーン用スプロケットにおい
て、少なくともチェーンの巻き込み側に位置する歯面
に、隣り合う歯底部の中心点を中心とする円弧形に湾曲
する円弧部を形成し、この円弧部の曲率半径をチェーン
のピッチからローラの回転半径を差し引いた値としたこ
とを特徴とするチェーン用スプロケット。1. A sprocket for a chain in which a tooth pitch of the sprocket is set to be substantially equal to a pitch of the chain, and tooth bottoms for accommodating rollers of the chain are formed between the teeth, and a tooth surface located at least on a winding side of the chain. In addition, an arc portion curved in an arc shape centered on the center point of the adjacent tooth bottom is formed, and the radius of curvature of this arc portion is set to a value obtained by subtracting the rolling radius of the roller from the pitch of the chain. Sprockets for chains. 【請求項２】 円弧部と歯底部とは段差なく滑らかに連
続させることを特徴とする請求項１記載のチェーン用ス
プロケット。2. The sprocket for a chain according to claim 1, wherein the arcuate portion and the tooth bottom portion are smoothly continuous without a step.
JP3633592A 1992-02-24 1992-02-24 Sprocket for chain Expired - Fee Related JP2890955B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3633592A JP2890955B2 (en) 1992-02-24 1992-02-24 Sprocket for chain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3633592A JP2890955B2 (en) 1992-02-24 1992-02-24 Sprocket for chain

Publications (2)

Publication Number Publication Date
JPH05231500A true JPH05231500A (en) 1993-09-07
JP2890955B2 JP2890955B2 (en) 1999-05-17

Family

ID=12466963

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3633592A Expired - Fee Related JP2890955B2 (en) 1992-02-24 1992-02-24 Sprocket for chain

Country Status (1)

Country Link
JP (1) JP2890955B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818644A2 (en) * 1996-07-09 1998-01-14 Tsubakimoto Chain Co. Tooth profile for roller chain sprocket
EP0886085A1 (en) * 1997-06-18 1998-12-23 Morse Tec Europe S.p.A. Sprocket wheel with improved tooth profile for greater silentness
EP1033509A3 (en) * 1999-03-02 2001-12-05 Sankyo Oilless Industry, Inc. Roller chain sprocket
GB2419172A (en) * 2004-10-18 2006-04-19 Tsubakimoto Chain Co A conveyor system
JP2009545709A (en) * 2006-08-01 2009-12-24 シュタール クラーン システムス ゲゼルシャフト ミット ベシュレンクテル ハフツング Deflection roller with increased load resistance of chain

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818644A2 (en) * 1996-07-09 1998-01-14 Tsubakimoto Chain Co. Tooth profile for roller chain sprocket
EP0818644A3 (en) * 1996-07-09 1998-01-28 Tsubakimoto Chain Co. Tooth profile for roller chain sprocket
US5921877A (en) * 1996-07-09 1999-07-13 Tsubakimoto Chain Co. Tooth profile for roller chain sprocket
EP0886085A1 (en) * 1997-06-18 1998-12-23 Morse Tec Europe S.p.A. Sprocket wheel with improved tooth profile for greater silentness
US6036614A (en) * 1997-06-18 2000-03-14 Morse Tec Europe S.P.A. Sprocket tooth with complex profile joining proximal and distal tooth portions
EP1033509A3 (en) * 1999-03-02 2001-12-05 Sankyo Oilless Industry, Inc. Roller chain sprocket
GB2419172A (en) * 2004-10-18 2006-04-19 Tsubakimoto Chain Co A conveyor system
US7442139B2 (en) 2004-10-18 2008-10-28 Tsubakimoto Chain Co. Conveyance system
GB2419172B (en) * 2004-10-18 2009-03-18 Tsubakimoto Chain Co Conveyance system
JP2009545709A (en) * 2006-08-01 2009-12-24 シュタール クラーン システムス ゲゼルシャフト ミット ベシュレンクテル ハフツング Deflection roller with increased load resistance of chain
JP2013200040A (en) * 2006-08-01 2013-10-03 Konecranes Plc Deflection roller having effect of increasing withstand load of chain
KR101423993B1 (en) * 2006-08-01 2014-08-01 코네크레인스 피엘씨 Deflecting roller with increased chain utilization

Also Published As

Publication number Publication date
JP2890955B2 (en) 1999-05-17

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