JP2007285411A - Deformed sprocket - Google Patents

Deformed sprocket Download PDF

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JP2007285411A
JP2007285411A JP2006113481A JP2006113481A JP2007285411A JP 2007285411 A JP2007285411 A JP 2007285411A JP 2006113481 A JP2006113481 A JP 2006113481A JP 2006113481 A JP2006113481 A JP 2006113481A JP 2007285411 A JP2007285411 A JP 2007285411A
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sprocket
small
diameter portion
deformed
diameter
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Tadao Ikuhara
忠男 生原
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Denso Corp
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Denso Corp
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Priority to JP2006113481A priority Critical patent/JP2007285411A/en
Priority to DE102007000229.9A priority patent/DE102007000229B4/en
Publication of JP2007285411A publication Critical patent/JP2007285411A/en
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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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F16H55/171—Toothed belt pulleys
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H55/084—Non-circular rigid toothed member, e.g. elliptic gear
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/30—Chain-wheels

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deformed sprocket capable of discriminating a position of a large diameter part and a small diameter part, in the deformed sprocket having the large diameter part and the small diameter part in the circumferential direction. <P>SOLUTION: This deformed sprocket is composed of an annular boss part having a shaft hole 10, an annular rim part 3 integrally formed on the outer peripheral side of this boss part 1, and a tooth part 4 formed on the outer peripheral side of this rim part 3. For discriminating the large diameter part and the small diameter part, a large diameter part mark 5 and a small diameter part mark 6 are carved as a large projection part or recess part mark and a small projection part or recess part mark in the rim part 3 positioned in the large diameter part and the small diameter part. Thus, the large diameter part and the small diameter part can be easily discriminated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は内燃機関のクランクシャフトやカムシャフトあるいはタイミングベルト等に使用される径方向の長さが異なる大径部及び小径部を有する異形スプロケットに関するものである。   The present invention relates to a deformed sprocket having a large-diameter portion and a small-diameter portion having different radial lengths used for a crankshaft, a camshaft, a timing belt or the like of an internal combustion engine.

スプロケットは、チェーンまたはベルトにより駆動され、内燃機関のクランクシャフト駆動用やカムシャフト駆動用あるいはタイミングベルト駆動用等に用いられている。   The sprocket is driven by a chain or a belt, and is used for driving a crankshaft, a camshaft or a timing belt of an internal combustion engine.

スプロケットは一般的に径の等しい円形をしているが、チェーン、またはベルトの張力を低減したり長寿命化を図るため、あるいは発生する騒音を低減するために、円形でない円周方向に大径部及び小径部を有する径の異なる異形のスプロケットが使用されることがある。一般的には３気筒エンジンの場合には三角形状のもの、４気筒エンジンの場合には楕円形状のもの、５気筒エンジンの場合には５角形形状のものが採用される。前記円周方向に大径部及び小径部を有するスプロケットは最も径の大きい部分（以下大径部）と径の最も小さい部分（以下小径部）を備えている。これら大径部と小径部の差は、半径で最大２ｍｍ程度である。   Sprockets are generally circular with the same diameter, but they have a large diameter in the circumferential direction that is not circular in order to reduce chain or belt tension, increase the service life, or reduce generated noise. Different shapes of sprockets having different diameters and portions may be used. Generally, a three-cylinder engine has a triangular shape, a four-cylinder engine has an elliptical shape, and a five-cylinder engine has a pentagonal shape. The sprocket having a large diameter portion and a small diameter portion in the circumferential direction includes a portion with the largest diameter (hereinafter referred to as a large diameter portion) and a portion with the smallest diameter (hereinafter referred to as a small diameter portion). The difference between the large diameter portion and the small diameter portion is about 2 mm at the maximum in radius.

円周方向に大径部及び小径部を有するスプロケットを検査する場合、任意の歯底部に円形のローラーをセットし、対角に位置する歯底部にも円形のローラーをセットし、この両者のローラー間距離を測り（このローラー間距離のことをオーバピン径という）、その距離よりピッチを計算して求めることがある。ローラーは玉としてもよい。   When inspecting a sprocket having a large-diameter part and a small-diameter part in the circumferential direction, a circular roller is set on an arbitrary tooth bottom part, and a circular roller is also set on a diagonally located tooth bottom part. The distance between the rollers may be measured (this distance between the rollers is called the overpin diameter), and the pitch may be calculated from the distance. The roller may be a ball.

通常の円形スプロケットにおいてはオーバピン径計測時、対角の位置のみを決めれば、即座にオーバピン径は計測でき、かつその理論値はどこを測定しても同一である。ところが円周方向に大径部及び小径部を有する異形スプロケットの場合、オーバピン径は計測する部分により異なる。そのため、円周方向に大径部及び小径部を有する異形スプロケットの場合、オーバピン計測時にどの部分を計測しているのかが判別困難で、誤計測が発生する。誤計測すると理論値との差が大きくなり、再度計測による時間ロスあるいは正規品として使用できないという問題がある。   With an ordinary circular sprocket, if only the diagonal position is determined when measuring the overpin diameter, the overpin diameter can be measured immediately, and the theoretical value is the same no matter where it is measured. However, in the case of a deformed sprocket having a large-diameter portion and a small-diameter portion in the circumferential direction, the overpin diameter varies depending on the portion to be measured. Therefore, in the case of a deformed sprocket having a large-diameter portion and a small-diameter portion in the circumferential direction, it is difficult to determine which portion is being measured during overpin measurement, and erroneous measurement occurs. If it is measured incorrectly, the difference from the theoretical value becomes large, and there is a problem that it cannot be used as a regular product or time loss due to measurement again.

本発明は内燃機関のクランクシャフトやカムシャフトあるいはタイミングベルトを駆動する等の為の異形スプロケットであって、大径部及び小径部の位置が分かる異形スプロケットを提供することを目的とするものである。   An object of the present invention is to provide a deformed sprocket for driving a crankshaft, a camshaft or a timing belt of an internal combustion engine, and the like, which can recognize the positions of a large diameter portion and a small diameter portion. .

本発明の異形スプロケットは、円周方向に大径部及び小径部を有する異形スプロケットであって、該大径部及び該小径部に位置する該スプロケットの側面上の歯先あるいは歯底と該スプロケットの中心とを結ぶ線上に位置する大径部印及び小径部印を備えることを特徴とする。   The deformed sprocket of the present invention is a deformed sprocket having a large-diameter portion and a small-diameter portion in the circumferential direction, and a tooth tip or a tooth bottom on the side surface of the sprocket located at the large-diameter portion and the small-diameter portion and the sprocket. A large-diameter portion mark and a small-diameter portion mark that are located on a line connecting the center of the small-diameter portion are provided.

本発明の異形スプロケットではその側面の大形部及び小径部に位置する所に大径部印及び小径部印が付されているため、径の測定位置が明確となり径の測定が容易となる。また、異形スプロケットの組付けが容易に正確にできる利点がある。   In the modified sprocket of the present invention, since the large diameter part mark and the small diameter part mark are attached to the large part and small diameter part on the side surface, the measurement position of the diameter becomes clear and the diameter can be easily measured. Further, there is an advantage that the irregular sprocket can be assembled easily and accurately.

大径部印及び小径部印は、大きい凹部あるいは大きい凸部及び小さい凹部あるいは小さい凸部とすることができる。凸部とか凹部は形状が単純で異形スプロケットの側面への印の形成が容易となる。   The large-diameter portion mark and the small-diameter portion mark can be a large concave portion or a large convex portion and a small concave portion or a small convex portion. The convex portion or the concave portion has a simple shape, and it becomes easy to form a mark on the side surface of the sprocket.

本発明の異形スプロケットは鋳造あるいは粉末冶金により製作することができる。この場合大径部印及び小径部印は成形用の鋳型あるいは押圧型に予め凸部、凹部を設けることにより大径部印及び小径部印の付いた異形スプロケットが得られる。   The modified sprocket of the present invention can be manufactured by casting or powder metallurgy. In this case, the large-diameter part mark and the small-diameter part mark can be obtained by forming a convex part and a concave part in a molding mold or a pressing die in advance to obtain a deformed sprocket with the large-diameter part mark and the small-diameter part mark.

本発明の異形スプロケットは、大径部及び小径部をそれぞれ２箇所有する楕円形状、大径部及び小径部をそれぞれ３箇所有する三角形状、大径部及び小径部をそれぞれ５箇所有する五角形状とすることができる。また、本発明の異形スプロケットは内燃機関用スプロケットとすることができる。具体的には、クランクシャフト駆動用、カムシャフト駆動用、タイミングベルト駆動用の異形スプロケットとすることができる。   The deformed sprocket of the present invention has an elliptical shape having two large diameter portions and two small diameter portions, a triangular shape having three large diameter portions and three small diameter portions, and a pentagon shape having five large diameter portions and five small diameter portions, respectively. be able to. The deformed sprocket of the present invention can be a sprocket for an internal combustion engine. Specifically, it can be a modified sprocket for driving a crankshaft, driving a camshaft, or driving a timing belt.

大径部印及び小径部印は、必ずしも大きい凸部あるいは凹部印、小さい凸部あるいは凹部印に限られるものではなく、例えば大や小の文字や、大きいあるいは小さい○や×の記号などとしてもよい。   The large-diameter part mark and the small-diameter part mark are not necessarily limited to the large convex part or concave part mark, the small convex part or concave part mark, and may be, for example, large or small letters, large or small symbols such as ○ and x, etc. Good.

大径部印及び小径部印を備えることにより、異形スプロケットの円周方向における大径部及び小径部を一目で判別できる。このためオーバピン径計測時に計測場所を、正確にかつ迅速にきめることができる。また、異形スプロケットの組付け時における組付け方向が容易となる。   By providing the large diameter portion mark and the small diameter portion mark, the large diameter portion and the small diameter portion in the circumferential direction of the deformed sprocket can be discriminated at a glance. For this reason, the measurement location can be determined accurately and quickly when measuring the overpin diameter. Moreover, the assembly direction at the time of assembling the irregular sprocket is facilitated.

本発明を実施するための最良の形態を以下に示す。   The best mode for carrying out the present invention will be described below.

本発明の実施例１の異形スプロケットを図１に示す。この異形スプロケットは、軸孔１０をもつ環状のボス部１とこのボス部１の外周側に一体的に形成された環状のリム部３と、このリム部３の外周側に等間隔に３０個形成された断面山状の歯部４とからなる。３０個の歯部４は、大径部となる最も遠心方向に突出した第１番目の歯部４の１から周方向に第２番目、第３番目と順次突出量が少なくなり、第５番目の歯部４の６が最も突出量が少なくなる。第７番目、第８番目と順次突出量が多くなり、第１１番目の歯部４の１１が第１番目の歯部４の１と同じ最も突出量の多いものとなる。この異形スプロケットは、第１番目の歯部４の１、第１１番目の歯部４の１１、第２１番目の歯部４の２１が最も遠心方向に突出量の大きい歯部となり、第６番目の歯部４の６、第１６番目の歯部４の１６、第２６番目の歯部４の２６が最も突出量の少ない歯部となる僅かに三角形状の異形となっている。   FIG. 1 shows a modified sprocket according to the first embodiment of the present invention. The deformed sprocket includes an annular boss 1 having a shaft hole 10, an annular rim 3 integrally formed on the outer peripheral side of the boss 1, and 30 at equal intervals on the outer peripheral side of the rim 3. It consists of the formed tooth part 4 with a cross-sectional mountain shape. The thirty tooth portions 4 have a projecting amount that decreases sequentially from the first tooth portion 4 that protrudes in the most centrifugal direction, which is the largest diameter portion, to the second and third in the circumferential direction. No. 6 of the tooth portion 4 has the least amount of protrusion. The amount of protrusion increases sequentially with the seventh and eighth, and 11 of the eleventh tooth portion 4 becomes the same as 1 of the first tooth portion 4 with the largest amount of protrusion. In this deformed sprocket, 1 of the first tooth portion 4, 11 of the 11th tooth portion 4 and 21 of the 21st tooth portion 4 are tooth portions having the largest protruding amount in the centrifugal direction, 6 of the tooth part 4, 16 of the 16th tooth part 4, and 26 of the 26th tooth part 4 are slightly triangularly shaped to become the tooth part with the least amount of protrusion.

この異形スプロケットのリム部３の一端側の端面の、第１番目の歯部４の１、第１１番目の歯部４の１１、第２１番目の歯部４の２１の最も突出した頂点と軸孔１０の中心とを結ぶ線上に径方向に長く、周方向に短い凹部からなる大径部印５がそれぞれ設けられている。また、同じ端面の、最も突出量が少ない第６番目の歯部４の６、第１６番目の歯部４の１６、第２６番目の歯部４の２６の頂点と軸孔１０の中心とを結ぶ線上に小さい丸い凹部からなる小径部印６がそれぞれ設けられている。なお、大径部印５及び小径部印６を含む部分の断面をそれぞれ図２，図３に示す。これら大径部印５及び小径部印６によりそれらの円周方向側にある歯部が最も遠心方向に突出量が多い歯部４の１、歯部４の１１、歯部４の２１であることが一見して明らかになる。   The most projecting vertex and axis of the first tooth portion 4, the eleventh tooth portion 4 11, and the twenty-first tooth portion 4 21 on the end surface of the rim portion 3 of the deformed sprocket. Large-diameter portion marks 5 each including a concave portion that is long in the radial direction and short in the circumferential direction are provided on a line connecting the center of the hole 10. In addition, on the same end face, the 6th tooth part 4 with the least amount of protrusion 6, the 16th tooth part 4 16, the 26th tooth part 4 26 vertices and the center of the shaft hole 10 Small-diameter portion marks 6 each having a small round recess are provided on the connecting line. 2 and 3 show the cross sections of the portions including the large diameter portion mark 5 and the small diameter portion mark 6, respectively. With these large diameter part mark 5 and small diameter part mark 6, the tooth parts on the circumferential direction side thereof are 1 of the tooth part 4, 11 of the tooth part 4, and 21 of the tooth part 4 having the largest protruding amount in the centrifugal direction. It becomes clear at a glance.

この異形スプロケットは、鋳鉄製である。このスプロケットは、その鋳型の型面に大径部印５、小径部印６の形状と型対象の、径方向に長く周方向に短い凸部及び小さい円形の凸部をもつ。この鋳型を用いることにより、本実施例のスプロケットを製造することができる。   This deformed sprocket is made of cast iron. This sprocket has the shape of the large diameter part mark 5 and the small diameter part mark 6 on the mold surface of the mold and the object of the mold, which has a long convex part in the radial direction and a short convex part in the circumferential direction, and a small circular convex part. By using this mold, the sprocket of this embodiment can be manufactured.

異形スプロケットの形状が設計寸法通り製作されているか検査する時、大径部に位置する前記異形スプロケットの歯部４の１の先端と軸孔１０の中心までの距離を測定し、設計寸法との比較により検査することができる。同様に小径部に位置する前記異形スプロケットの歯部４の６の先端と軸孔１０の中心までの距離を測定し、設計寸法との比較により検査することができる。また大径部、小径部以外の歯部についても、同様の方法で検査することができる。   When inspecting whether the shape of the deformed sprocket is manufactured as designed, the distance from the tip of one of the deformed sprocket teeth 4 located at the large diameter portion to the center of the shaft hole 10 is measured, It can be inspected by comparison. Similarly, the distance from the tip of the tooth portion 4 of the deformed sprocket located at the small diameter portion 6 to the center of the shaft hole 10 can be measured and inspected by comparison with the design dimension. Further, tooth portions other than the large diameter portion and the small diameter portion can be inspected by the same method.

従来は印がないため、大径部と小径部歯部の突出量の差がわずかな場合、大径部と小径部の判別が困難で誤計測や、判別のため、あるいは誤計測時の再測定による時間ロスが発生していた。   Since there is no mark in the past, if the difference in protrusion between the large-diameter portion and the small-diameter portion tooth is small, it is difficult to distinguish between the large-diameter portion and the small-diameter portion. A time loss due to measurement occurred.

本発明である大径部印及び小径部印を備えることにより大径部、小径部を容易に判別でき誤計測や、判別のため、あるいは誤計測時の再測定による時間ロスが無くなる。かつコストダウにもなる。さらに本発明は大径部印、小径部印を鋳型の型面に刻むため、製造工程が増えることもない。   By providing the large-diameter part mark and the small-diameter part mark according to the present invention, the large-diameter part and the small-diameter part can be easily discriminated, and there is no time loss due to erroneous measurement, discrimination, or remeasurement at the time of erroneous measurement. And it will also cost down. Furthermore, since the present invention engraves the large diameter mark and the small diameter mark on the mold surface, the manufacturing process does not increase.

また、異形スプロケットをクランクシャフトに挿通固定する時、大径部印及び小径部印を利用しタイミング位置決めが容易に正確にできる。   Further, when the deformed sprocket is inserted and fixed to the crankshaft, the timing positioning can be easily and accurately performed using the large diameter portion mark and the small diameter portion mark.

本発明の実施例２の異形スプロケットを図４に示す。この異形スプロケットは、軸孔２０をもつ環状のボス部１１とこのボス部１１の外周側に一体的に形成された環状のリム部１３と、このリム部１３の外周側に等間隔に３０個形成された断面山状の歯部１４とからなる。３０個の歯部１４は、大径部となる最も遠心方向に突出した第１番目の歯部１４の１から周方向に第２番目、第３番目と順次突出量が少なくなり、第８番目と第９番目の歯部１４の８と１４の９が最も突出量が少なくなる。第１０番目、第１１番目と順次突出量が多くなり、第１６番目の歯部１４の１６が第１番目の歯部１４の１と同じ最も突出量の多いものとなる。この異形スプロケットは、第１番目の歯部１４の１、第１６番目の歯部１４の１６が最も遠心方向に突出量の大きい歯部となり、第８番目と第９番目の歯部１４の８と１４の９、第２３番目と第２４番目の歯部１４の２３と１４の２４が最も突出量の少ない歯部となる僅かに楕円形状の異形となっている。   FIG. 4 shows a modified sprocket according to the second embodiment of the present invention. The deformed sprocket includes an annular boss portion 11 having a shaft hole 20, an annular rim portion 13 integrally formed on the outer peripheral side of the boss portion 11, and 30 pieces at regular intervals on the outer peripheral side of the rim portion 13. It consists of the formed tooth portion 14 having a mountain-shaped cross section. The thirty tooth portions 14 have a projecting amount that decreases in order from the first tooth portion 14 that protrudes in the most centrifugal direction, which is the largest diameter portion, to the second and third in the circumferential direction. And the 9th tooth portion 14 8 and 14 9 have the least amount of protrusion. The tenth and eleventh protrusions increase sequentially, and the 16th tooth portion 14 has the same maximum protrusion amount as 1 of the first tooth portion 14. In this modified sprocket, 1 of the first tooth portion 14 and 16 of the 16th tooth portion 14 are tooth portions having the largest protruding amount in the centrifugal direction, and 8th of the eighth and ninth tooth portions 14. 9 and 14, and 23 and 14 of the 23rd and 24th tooth portions 14 are slightly oval shaped to be the tooth portions with the least amount of protrusion.

この異形スプロケットのリム部１３の一端側の端面の、第１番目の歯部１４の１、第１６番目の歯部１４の１６の最も突出した頂点と軸孔２０の中心とを結ぶ線上に径方向に長く、周方向に短い凸部からなる大径部印１５がそれぞれ設けられている。また、同じ端面の、最も突出量が少ない第８番目と第９番目の歯部の間の歯底部１１、第２３番目と第２４番目の歯部の間の歯底部１１と軸孔２０の中心とを結ぶ線上に小さい丸い凸部からなる小径部印１６がそれぞれ設けられている。なお、大径部印１５及び小径部印１６を含む部分の断面をそれぞれ図５、図６に示す。これら大径部印１５及び小径部印１６によりそれらの円周方向側にある歯部が最も遠心方向に突出量が多い歯部１４の１、歯部４の１６であることが一見して明らかになる。   The diameter of the end face on one end side of the rim portion 13 of this deformed sprocket is on a line connecting 1 of the first tooth portion 14 and 16 most protruding vertices of the 16th tooth portion 14 and the center of the shaft hole 20. Large-diameter portion marks 15 each having a convex portion that is long in the direction and short in the circumferential direction are provided. Also, the center of the shaft hole 20 and the tooth bottom portion 11 between the eighth and ninth tooth portions, the tooth bottom portion 11 between the twenty-third and twenty-fourth tooth portions, and the shaft hole 20 of the same end face with the least amount of protrusion. A small-diameter portion mark 16 made of a small round convex portion is provided on each line connecting the two. 5 and 6 show cross sections of portions including the large diameter portion mark 15 and the small diameter portion mark 16, respectively. At first glance, it is obvious from the large-diameter portion mark 15 and the small-diameter portion mark 16 that the tooth portions on the circumferential side are 1 of the tooth portions 14 and 16 of the tooth portions 4 having the largest protruding amount in the centrifugal direction. become.

この異形スプロケットは、焼結高強度鋼を粉末冶金によって製作する。このスプロケットは、その押圧型の型面に大径部印１５、小径部印１６の形状と型対象の、径方向に長く周方向に短い凹部及び小さい円形の凹部をもつ。この型を用いることにより、本実施例のスプロケットを製造することができる。   This deformed sprocket is made of sintered high-strength steel by powder metallurgy. This sprocket has a large-diameter mark 15 and a small-diameter mark 16 on the die surface of the pressing die and a die object having a concave portion that is long in the radial direction and short in the circumferential direction and a small circular concave portion. By using this mold, the sprocket of this embodiment can be manufactured.

異形スプロケットの形状が設計寸法通り製作されているか検査する時、大径部に位置する前記異形スプロケットの歯先１横の歯底部１１、つまり歯部１４の１と歯部１４の２の間の歯底部１１に円形のローラーをセットし、異形スプロケット中心とを結ぶ線上に位置する対角の歯底部１１、つまり歯部１４の１６と歯部１４の１７の間の歯底部１１にも円形のローラーをセットし、以下オーバピン径を測り、その距離よりピッチを計算して求め、設計寸法通り製作されているか検査する。また大径部、小径部以外の歯部についても、同様の方法で検査することができる。   When inspecting whether the shape of the deformed sprocket is manufactured according to the design dimensions, the bottom 11 of the deformed sprocket located next to the tooth tip 1 of the deformed sprocket located at the large diameter portion, that is, between the tooth portion 14 1 and the tooth portion 2 2. A circular roller is set on the root portion 11, and the diagonal bottom portion 11 located on the line connecting the deformed sprocket center, that is, the bottom portion 11 between the tooth portion 14 16 and the tooth portion 17 17 is also circular. Set the roller, measure the overpin diameter, calculate the pitch from the distance, and inspect whether it is manufactured as designed. Further, tooth portions other than the large diameter portion and the small diameter portion can be inspected by the same method.

従来は印がないため、大径部と小径部歯部の突出量の差がわずかな場合、大径部と小径部の判別が困難で誤計測や、判別のため、あるいは誤計測時の再測定による時間ロスが発生していた。   Since there is no mark in the past, if the difference in protrusion between the large-diameter portion and the small-diameter portion tooth is small, it is difficult to distinguish between the large-diameter portion and the small-diameter portion. A time loss due to measurement occurred.

本発明である大径部印及び小径部印を備えることにより大径部、小径部を容易に判別でき誤計測や、判別のため、あるいは誤計測時の再測定による時間ロスが無くなる。かつコストダウにもなる。さらに本発明は大径部印、小径部印を押圧型の型面に刻むため、製造工程が増えることもない。   By providing the large-diameter part mark and the small-diameter part mark according to the present invention, the large-diameter part and the small-diameter part can be easily discriminated, and there is no time loss due to erroneous measurement, discrimination, or remeasurement at the time of erroneous measurement. And it will also cost down. Furthermore, since the present invention engraves the large-diameter part mark and the small-diameter part mark on the pressing mold surface, the manufacturing process does not increase.

また、異形スプロケットをカムシャフトに挿通固定する時、大径部印及び小径部印を利用しタイミング位置決めが容易に正確にできる。   Further, when the irregular sprocket is inserted and fixed to the camshaft, the timing positioning can be easily and accurately performed using the large diameter portion mark and the small diameter portion mark.

円周方向に大径部及び小径部を有する異形スプロケットで、円周方向に大径部及び小径部をそれぞれ３箇所有する三角形状のスプロケットの正面図である。FIG. 3 is a front view of a triangular sprocket having three large-diameter portions and three small-diameter portions in the circumferential direction, which is a deformed sprocket having a large-diameter portion and a small-diameter portion in the circumferential direction. 図１のＡ線断面図で大径部印凹である。It is a large diameter part indentation in the A line sectional view of FIG. 図１のＢ線断面図で小径部印凹である。It is a small diameter part impression in the B line sectional view of FIG. 円周方向に大径部及び小径部を有する異形スプロケットで、円周方向に大径部及び小径部をそれぞれ２箇所有する楕円形状のスプロケットの正面図である。FIG. 3 is a front view of an elliptical sprocket having two large-diameter portions and two small-diameter portions in the circumferential direction, which is a deformed sprocket having a large-diameter portion and a small-diameter portion in the circumferential direction. 図４のＡ線断面図で大径部印凸である。In the cross-sectional view taken along line A in FIG. 図４のＢ線断面図で小径部印凸である。It is a small-diameter part stamp convexity in B line sectional drawing of FIG.

符号の説明Explanation of symbols

１：ボス部 ３：リム部 ４：歯部 ５：大径部印 ６：小径部印 １０：軸孔 １１：歯底部
２０：ボス部 １３：リム部 １４：歯部 １５：大径部印 １６：小径部印 1: Boss portion 3: Rim portion 4: Tooth portion 5: Large diameter portion mark 6: Small diameter portion mark 10: Shaft hole 11: Tooth bottom portion 20: Boss portion 13: Rim portion 14: Tooth portion 15: Large diameter portion mark 16 : Small diameter part mark

Claims (10)

円周方向に大径部及び小径部を有する異形スプロケットであって、
前記大径部及び前記小径部に位置する前記スプロケットの側面上の歯先あるいは歯底と該スプロケットの中心とを結ぶ線上に位置する大径部印及び小径部印を備えることを特徴とする異形スプロケット。 A modified sprocket having a large diameter portion and a small diameter portion in the circumferential direction,
A variant having a large-diameter mark and a small-diameter mark positioned on a line connecting a tooth tip or a tooth bottom on the side surface of the sprocket located at the large-diameter portion and the small-diameter portion and the center of the sprocket. sprocket. 前記大径部印及び前記小径部印は、大きい凹部あるいは大きい凸部及び小さい凹部あるいは小さい凸部である請求項１に記載の異形スプロケット。   The deformed sprocket according to claim 1, wherein the large-diameter portion mark and the small-diameter portion mark are a large concave portion or a large convex portion and a small concave portion or a small convex portion. 前記異形スプロケットは鋳造されたものである請求項２に記載の異形スプロケット。   The deformed sprocket according to claim 2, wherein the deformed sprocket is cast. 前記異形スプロケットは、粉末冶金で製造されたものである請求項２に記載の異形スプロケット。   The deformed sprocket according to claim 2, wherein the deformed sprocket is manufactured by powder metallurgy. 前記異形スプロケットは前記大径部及び前記小径部をそれぞれ２箇所有する楕円形状である請求項１〜４に記載の異形スプロケット。   5. The deformed sprocket according to claim 1, wherein the deformed sprocket has an elliptical shape having two portions each having the large diameter portion and the small diameter portion. 前記異形スプロケットは前記大径部及び前記小径部をそれぞれ３箇所有する三角形状である請求項１〜４に記載の異形スプロケット。   5. The deformed sprocket according to claim 1, wherein the deformed sprocket has a triangular shape having three portions each having the large diameter portion and the small diameter portion. 前記異形スプロケットは前記大径部及び前記小径部をそれぞれ５箇所有する五角形状である請求項１〜４に記載の異形スプロケット。   5. The deformed sprocket according to claim 1, wherein the deformed sprocket has a pentagonal shape having five portions each having the large diameter portion and the small diameter portion. 前記異形スプロケットは、クランクシャフト駆動用である請求項１〜７に記載の異形スプロケット。   The deformed sprocket according to claim 1, wherein the deformed sprocket is for driving a crankshaft. 前記異形スプロケットは、カムシャフト駆動用である請求項１〜７に記載の異形スプロケット。   The deformed sprocket according to claim 1, wherein the deformed sprocket is for driving a camshaft. 前記異形スプロケットは、タイミングベルト駆動用である請求項１〜７に記載の異形スプロケット。   The deformed sprocket according to claim 1, wherein the deformed sprocket is for driving a timing belt.
JP2006113481A 2006-04-17 2006-04-17 Deformed sprocket Pending JP2007285411A (en)

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JPH10148242A (en) * 1996-11-20 1998-06-02 Honda Motor Co Ltd Gear transmission using silent chain
JP2001235183A (en) * 2000-02-18 2001-08-31 Daikin Ind Ltd Vibration-proof material mounting structure, and vibration-proof material, and outdoor unit base
JP2005510677A (en) * 2001-11-27 2005-04-21 リテンズ オートモーティヴ Synchronous drive device having non-circular drive element
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