JP7406318B2 - chain - Google Patents

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JP7406318B2
JP7406318B2 JP2019126268A JP2019126268A JP7406318B2 JP 7406318 B2 JP7406318 B2 JP 7406318B2 JP 2019126268 A JP2019126268 A JP 2019126268A JP 2019126268 A JP2019126268 A JP 2019126268A JP 7406318 B2 JP7406318 B2 JP 7406318B2
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pin
link
chain
plate
pin hole
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JP2021011919A (en
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俊和 大畠
章文 石王
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Daido Kogyo Co Ltd
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Daido Kogyo Co Ltd
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Priority to JP2019126268A priority Critical patent/JP7406318B2/en
Priority to KR1020200078322A priority patent/KR102313760B1/en
Priority to CN202010618759.1A priority patent/CN112178131B/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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/02—Driving-chains
    • F16G13/06—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes
    • F16G15/04—Quickly-detachable chain couplings; Shackles chain links with rapid junction means are classified according to the corresponding kind of chain
    • F16G15/06—Shackles designed for attachment by joint pins to chain elements, e.g. D-shackles so called harp links; the D-chain links are classified according to the corresponding kind of chain
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes
    • F16G15/12—Chain links
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
    • 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
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/24—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Description

本発明は、リンクプレートからなる第１及び第２リンクをピンにより交互に連結したチェーンに係り、特にベルト式無段変速装置（ＣＶＴ）に用いて好適なチェーンに関する。 The present invention relates to a chain in which first and second links consisting of link plates are alternately connected by pins, and particularly to a chain suitable for use in a belt-type continuously variable transmission (CVT).

一般に、チェーン１は、図１１に示すように、両端部に円形のピン孔２，２を有するリンクプレート３からなる第１及び第２リンク５，６をピンを介して交互に連結して無端状に形成されており、ピンの両端をＶプーリのシーブに当接して、ＣＶＴ用チェーンとして用いられる。第１及び第２リンク５，６の同列のリンクプレート３，３同士は、所定隙間を在して整列しており、このためリンクプレートの危険断面長さＡは、チェーンピッチＰからピン孔径Ｄを引いた距離の半分以下となる［Ａ＜（Ｐ－Ｄ）／２］。 Generally, as shown in FIG. 11, a chain 1 is made of an endless chain consisting of first and second links 5, 6, which are made up of link plates 3 having circular pin holes 2, 2 at both ends, and are alternately connected via pins. It is used as a CVT chain by having both ends of the pin contact the sheave of a V pulley. The link plates 3 and 3 in the same row of the first and second links 5 and 6 are aligned with a predetermined gap between them, and therefore the critical cross-section length A of the link plates is calculated from the chain pitch P to the pin hole diameter D. It is less than half the distance obtained by subtracting [A<(PD)/2].

ＣＶＴ用チェーンにあって、ピン（クレードル部材）の断面形状を左右非対称として、該ピンの転動面とリンクプレート（リンクエレメント）のピン孔の転動域とが転動可能に接触すると共に、上記ピンのシーブへの接触部がピンの中心からずれて形成されるチェーンが提案されている（特許文献１）。該チェーンは、左右のピン孔の転動域が内側面と外側面で異なるリンクプレートを有し、該リンクプレートの左右のピン孔に上記左右非対称のピンを嵌挿して、それぞれ隣接する２つの上記ピンの転動間隔及びピンのシーブとの接触点間の間隔を、３種の長さ（平均、長い、短い）にランダム化して、ピンがシーブに接触することによる騒音の周波数を分散して、低騒音を図っている。 In the CVT chain, the cross-sectional shape of the pin (cradle member) is asymmetrical, so that the rolling surface of the pin and the rolling area of the pin hole of the link plate (link element) are in rolling contact with each other, and A chain has been proposed in which the contact portion of the pin to the sheave is formed offset from the center of the pin (Patent Document 1). The chain has a link plate in which the rolling range of the left and right pin holes is different on the inner and outer surfaces, and the asymmetrical pins are inserted into the left and right pin holes of the link plate, and the two adjacent The rolling interval of the pin and the interval between the contact points of the pin with the sheave are randomized into three lengths (average, long, short) to disperse the frequency of noise caused by the pin contacting the sheave. The aim is to reduce noise.

特表２００９－５２０１６１号公報Special Publication No. 2009-520161

前記円形からなるピン孔を有するリンクプレートを備えたチェーン１は、前記危険断面長さＡがチェーン伝動能力に対応した値であり、従って該チェーン１のピッチＰは、所定値以上に規定される。 In the chain 1 equipped with link plates having circular pin holes, the critical cross-section length A has a value corresponding to the chain transmission capacity, and therefore the pitch P of the chain 1 is specified to be greater than a predetermined value. .

上記特許文献１のチェーンは、ピンとピン孔との転動面及び転動域の間隔が短いチェーンリンクがあるとしても、リンクプレートの両端部には転動域を有するピン孔が必要であり、リンクプレートの長さは、所定値に規定され、チェーンピッチの低減化には機能しない。 In the chain of Patent Document 1, even if there is a chain link with a short distance between the rolling surface and the rolling area between the pin and the pin hole, the pin hole with the rolling area is required at both ends of the link plate. The length of the link plate is defined to a predetermined value and does not function to reduce the chain pitch.

そこで、本発明は、チェーンの強度を損うことなくチェーンピッチの低減化を図り、もってチェーンの静音性を向上したチェーンを提供することを目的とするものである。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a chain in which the chain pitch is reduced without impairing the strength of the chain, thereby improving the quietness of the chain.

本発明は、それぞれ外プレート（２１）及び内プレート（２２）を有する第１リンク（１９）と第２リンク（２０）とを、前記外プレート（２１）及び内プレート（２２）に形成した１対のピン孔（２５，２６）にピン（２３）を貫通して交互にかつ無端状に連結してなるチェーン（１３）において、
前記ピン（２３）の断面形状は、転動面（２３ｂ）を有する非対称形状からなり、
前記第１リンク（１９）及び前記第２リンク（２０）は、前記外プレート（２１）を幅方向両端に配置し、複数枚の前記内プレート（２２）を前記外プレート（２１）の間に配置し、
前記第１リンク（１９）及び前記第２リンク（２０）における外プレート（２１）の一方のピン孔（２５）に前記ピン（２３）を固定すると共に内プレート（２２）の一方のピン孔（２７）に該ピン（２３）を一体に回転するように嵌挿し、
前記第１リンク（１９）及び前記第２リンク（２０）における外プレート（２１）及び内プレート（２２）の他方のピン孔（２６，２９）に前記ピン（２３）の転動面（２３ｂ）を転動自在に嵌挿し、
前記第１リンク（１９）及び前記第２リンク（２０）の外プレート（２１）は、同じ形状からなり、
前記第１リンク（１９）及び前記第２リンク（２０）の内プレート（２２）は、同じ形状からなり、
前記外プレート（２１）及び前記内プレート（２２）の他方のピン孔（２６）（２９）は、一方側（Ｅ）が円弧面からなり、他方側（Ｆ）が前記ピン（２３）の転動面（２３ｂ）に転動する転動域からなる概ね半円形状からなる、
ことを特徴とするチェーンにある。 The present invention provides a first link (19) and a second link (20) having an outer plate (21) and an inner plate (22), respectively, formed on the outer plate (21) and the inner plate (22). In a chain (13) formed by passing pins (23) through a pair of pin holes (25, 26) and connecting them alternately and endlessly,
The cross-sectional shape of the pin (23) is an asymmetrical shape having a rolling surface (23b),
The first link (19) and the second link (20) have the outer plate (21) disposed at both ends in the width direction, and a plurality of inner plates (22) between the outer plates (21). place,
The pin (23) is fixed to one pin hole (25) of the outer plate (21) of the first link (19) and the second link (20), and one pin hole (25) of the inner plate (22) is fixed to the first link (19) and the second link (20). 27) so that the pin (23) rotates integrally with the pin (23),
The rolling surface (23b) of the pin (23) is located in the other pin hole (26, 29) of the outer plate (21) and inner plate (22) in the first link (19) and the second link (20). Insert it so that it can roll freely,
The outer plates (21) of the first link (19) and the second link (20) have the same shape,
The inner plates (22) of the first link (19) and the second link (20) have the same shape,
The other pin holes (26) and (29) of the outer plate (21) and the inner plate (22) have one side (E) formed of an arcuate surface and the other side (F) formed of a circular arc surface. It has a roughly semicircular shape consisting of a rolling area that rolls on the moving surface (23b),
It's on a chain that features a lot of things.

例えば図１、図５を参照して、前記ピン（２３）の両端面は、無段変速装置（ＣＶＴ）（１０）のＶプーリ（１１，１２）のシーブ（１４，１５）（１６，１７）に当接する傾斜面（２３ｃ）からなる。 For example, with reference to FIGS. 1 and 5, both end surfaces of the pin (23) are connected to sheaves (14, 15) (16, 17) of V pulleys (11, 12) of a continuously variable transmission (CVT) (10). ).

例えば図５を参照して、前記ピン（２３）の断面形状は、一方側（２３ａ）が所定半径（Ｒ１）の円弧面であり、前記転動面である他方側（２３ｂ）が前記所定半径（Ｒ１）より大きな半径（Ｒ２）からなる円弧面である概ね半円形状からなり、
前記外プレート（２１）及び前記内プレート（２２）における他方のピン孔（２６）（２９）の前記転動域である他方側（Ｆ）が直線形状である。 For example, referring to FIG. 5, the cross-sectional shape of the pin (23) is such that one side (23a) is an arcuate surface with a predetermined radius (R1), and the other side (23b), which is the rolling surface, has the predetermined radius. (R1) consists of a generally semicircular shape that is an arcuate surface consisting of a larger radius (R2),
The other side (F), which is the rolling area, of the other pin holes (26) and (29) in the outer plate (21) and the inner plate (22) has a linear shape.

例えば図７、図８及び図９を参照して、前記外プレート（２１）及び前記内プレート（２２）における前記他方のピン孔（２６）（２９）の転動域である他方側（Ｆ）が、チェーンの外径方向に向って拡がるように傾斜してなり、
前記他方のピン孔（２６）（２９）の転動域である他方側（Ｆ）は、チェーンの直線状態におけるピン転動面との接触位置（ｄ）に対して前記チェーンの内径側（α）（Ｌ２）に比して外径側（β）（Ｌ３）が広い。 For example, with reference to FIGS. 7, 8 and 9, the other side (F) is the rolling area of the other pin holes (26) and (29) in the outer plate (21) and the inner plate (22). is inclined so as to expand toward the outer diameter of the chain,
The other side (F), which is the rolling area of the other pin holes (26) and (29), is located on the inner diameter side (α ) (L2), the outer diameter side (β) (L3) is wider.

例えば図９を参照して、前記外プレート（２１）及び前記内プレート（２２）の前記他方のピン孔（２６）（２９）側の危険断面長さは、前記チェーンの外径側（Ｌ５）に比して内径側（Ｌ４）が長い。 For example, with reference to FIG. 9, the critical cross-section length of the other pin holes (26) and (29) of the outer plate (21) and the inner plate (22) is on the outer diameter side (L5) of the chain. The inner diameter side (L4) is longer than that.

例えば図３、図４を参照して、前記第１リンク（１９）及び前記第２リンク（２０）における前記外プレート（２１）の一方のピン孔（２５）は、前記ピン（２３）を圧入して固定してなる。 For example, with reference to FIGS. 3 and 4, one pin hole (25) of the outer plate (21) in the first link (19) and the second link (20) is into which the pin (23) is press-fitted. It becomes fixed.

なお、上記カッコ内の符号は、図面と対照するためのものであるが、これにより特許請求の範囲の記載に何等影響を及ぼすものではない。 Note that the above reference numerals in parentheses are for contrast with the drawings, but do not affect the description of the claims in any way.

請求項１に係る本発明によると、第１リンク及び第２リンクの外プレート及び内プレートは、それぞれ一方のピン孔にはピンが固定又は一体に回転するように嵌挿し、他方のピン孔にピンの転動面が転動してチェーンを屈曲するので、チェーンの引張り応力を安定して確実に動力伝達し得ると共に、各リンクそれぞれ１個のピンに対して転動して、高い精度の転動によりチェーンを安定して屈曲して、正確なチェーン伝動を行うことができる。 According to the invention according to claim 1, the outer plate and the inner plate of the first link and the second link each have a pin fitted into one pin hole so as to be fixed or rotate together, and a pin fitted into the other pin hole. The rolling surfaces of the pins roll and bend the chain, making it possible to stably and reliably transmit the tensile stress of the chain, and each link rolling against one pin, resulting in highly accurate The rolling motion allows the chain to bend stably, allowing for accurate chain transmission.

ピンは、転動面を有する非対称形状からなり、各リンクに一方のピンが転動しかつ他方のピンは固定又は一体に回転するように連結するので、外プレート及び内プレートの長さを短くすることができ、チェーンの強度を損うことなくチェーンピッチの低減化を図ることができ、チェーンの静音性を向上することが可能となる。
また、外プレート及び内プレートは、第１リンク及び第２リンクにあって共通した形態で足り、外プレート及び内プレートの他方のピン孔は、概ね半円形状からなり、チェーンピッチの短縮化を図り、比較的簡単な構成でチェーンの静音化を図ることができる。 The pins have an asymmetrical shape with rolling surfaces, and are connected to each link so that one pin rolls and the other pin is fixed or rotates together, so the lengths of the outer and inner plates can be shortened. Therefore, the chain pitch can be reduced without reducing the strength of the chain, and the quietness of the chain can be improved.
In addition, the outer plate and the inner plate need only have a common shape for the first link and the second link, and the pin holes on the other side of the outer plate and the inner plate have a generally semicircular shape to shorten the chain pitch. Therefore, the chain can be made quieter with a relatively simple structure.

請求項２に係る本発明によると、本チェーンを無段変速装置（ＣＶＴ）に適用して、伝動容量を保持しつつ、無段変速装置の静音化に寄与することができる。 According to the second aspect of the present invention, the present chain can be applied to a continuously variable transmission (CVT), thereby contributing to noise reduction of the continuously variable transmission while maintaining transmission capacity.

請求項３に係る本発明によると、ピンは、半径の異なる円弧面により概ね半円形状からなり、該ピンの大きな半径の円弧面からなる転動面と、直線形状からなるピン孔の転動域とで、比較的簡単な構成で正確で安定した転動を可能とすることができる。 According to the present invention according to claim 3 , the pin has a generally semicircular shape with arcuate surfaces having different radii, and the rolling surface of the pin is made of an arcuate surface with a large radius, and the rolling surface of the pin hole has a linear shape. With this, accurate and stable rolling can be achieved with a relatively simple configuration.

請求項４に係る本発明によると、他方のピン孔の転動域が、チェーンの外径方向に向って拡がるように傾斜して、チェーン直線状態におけるピン転動面との接触位置に対してチェーンの外径側が内側に比して広くしたので、チェーンは、全体の屈曲面を所定範囲に抑えて、チェーンの引張り強度を保持しつつ、チェーン巻掛け（内径）方向に対して必要屈曲角にて屈曲して、チェーン、特に無段変速装置（ＣＶＴ）用チェーンとしての機能を得ることができる。 According to the present invention according to claim 4 , the rolling area of the other pin hole is inclined so as to expand in the outer diameter direction of the chain, and the rolling area of the other pin hole is inclined with respect to the contact position with the pin rolling surface when the chain is in a straight state. Since the outside diameter side of the chain is wider than the inside diameter side, the chain can be bent at the necessary bending angle in the chain wrapping (inner diameter) direction while keeping the overall bending surface within a specified range and maintaining the chain's tensile strength. By bending the chain, it can function as a chain, especially a chain for a continuously variable transmission (CVT).

請求項５に係る本発明によると、他方のピン側の危険断面長さを、チェーンの内径側を外径側に比して長くしたので、チェーンの引張り力が最も作用するチェーンの直線状態において、上述したピン孔の転動域を斜めに形成したことによるプレート端部の応力の差異を上記危険断面長さの相違で吸収して、外及び内プレートの引張り強度を確保することができる。 According to the present invention as claimed in claim 5 , the length of the critical cross section on the other pin side is made longer on the inner diameter side of the chain than on the outer diameter side, so that in the straight state of the chain where the tensile force of the chain is most applied. The difference in stress at the end of the plate due to the oblique formation of the rolling region of the pin hole described above can be absorbed by the difference in critical section length, thereby ensuring the tensile strength of the outer and inner plates.

請求項６に係る本発明によると、第１及び第２リンクの外プレートの一方のピン孔にピンを圧入して固定するので、比較的簡単な構造でもって、チェーンの各プレートの列を整然と保持することができる。 According to the present invention according to claim 6 , since the pin is press-fitted into the pin hole of one of the outer plates of the first and second links and fixed, the rows of each plate of the chain can be arranged in an orderly manner with a relatively simple structure. can be retained.

本発明に係るチェーンを用いた無段変速装置（ＣＶＴ）を示す概略斜視図。1 is a schematic perspective view showing a continuously variable transmission (CVT) using a chain according to the present invention. 本発明の実施の形態に係るチェーンを示す斜視図。FIG. 1 is a perspective view showing a chain according to an embodiment of the present invention. 上記チェーンの第１リンクを示す分解斜視図。FIG. 3 is an exploded perspective view showing the first link of the chain. 上記チェーンの第２リンクを示す分解斜視図。The exploded perspective view which shows the 2nd link of the said chain. 上記チェーンのピンを示し、（ａ）は正面図、（ｂ）は側面図。The pin of the said chain is shown, (a) is a front view, (b) is a side view. （ａ）は上記チェーンの外プレートを示す側面図、（ｂ）は内プレートを示す側面図。(a) is a side view showing the outer plate of the chain, and (b) is a side view showing the inner plate. （ａ）は直線状態にある上記チェーンの側面断面図、（ｂ）はピン及びピン孔部分を示す側面断面図。(a) is a side cross-sectional view of the chain in a straight state, and (b) is a side cross-sectional view showing a pin and a pin hole portion. （ａ）は上記チェーンの屈曲状態を示す側面断面図、（ｂ）はその状態のピン及びピン孔部分を示す側面断面図。(a) is a side cross-sectional view showing the bent state of the chain, and (b) is a side cross-sectional view showing the pin and pin hole portion in that state. 上記チェーンのリンクプレートの端部分を示す側面断面図。FIG. 3 is a side sectional view showing an end portion of a link plate of the chain. 本発明に係るチェーンと従来技術によるチェーンを比較した側面図。FIG. 2 is a side view comparing a chain according to the present invention and a chain according to the prior art. 従来の技術によるチェーンを示す斜視図。FIG. 1 is a perspective view showing a chain according to a conventional technique.

以下、図面に沿って本発明の実施の形態について説明する。無段変速装置（ＣＶＴ）１０は、図１に示すように、原動プーリ１１、従動プーリ１２及びチェーン１３を備える。原動プーリ１１は、対向する円錐形状からなる可動シーブ１４及び固定シーブ１５からなり、従動プーリ１２も可動シーブ１６及び固定シーブ１７からなり、これら両プーリ１１，１２の間にチェーン１３が巻掛けられる。原動プーリ１１の可動シーブ１４を移動することにより、原動プーリ１１のチェーン巻掛け半径が調節され、それに応じて従動プーリ１２のチェーン巻掛け半径が移動して、原動プーリ１１の回転が従動プーリ１２に無段に変速して伝達される。 Embodiments of the present invention will be described below along with the drawings. The continuously variable transmission (CVT) 10 includes a driving pulley 11, a driven pulley 12, and a chain 13, as shown in FIG. The driving pulley 11 is made up of a movable sheave 14 and a fixed sheave 15, each having a conical shape that faces each other, and the driven pulley 12 is also made up of a movable sheave 16 and a fixed sheave 17, and a chain 13 is wound between these two pulleys 11 and 12. . By moving the movable sheave 14 of the driving pulley 11, the chain wrapping radius of the driving pulley 11 is adjusted, and the chain wrapping radius of the driven pulley 12 is moved accordingly, so that the rotation of the driving pulley 11 is controlled by the driven pulley 12. The transmission speed is continuously variable.

上記チェーン１３は、図２に示すように、第１（外）リンク１９と第２（内）リンク２０とがピン２３により交互に連結されて、無端状に形成されている。第１リンク１９は、図３に示すように、外プレート２１及び内プレート２２を有し、ピン２３により連結されている。外プレート２１は、ピンの軸方向（チェーン幅方向）両端に位置し、これら両外プレート２１の間に複数枚の内プレート２２が配置される。外プレート２１は、１対の概ね半円形状のピン孔２５，２６を有しており、内プレート２２は、左右に円形状のピン孔２７と概ね半円形状のピン孔２９とを有している。ピン２３は、外プレートの一方のピン孔２５に圧入・固定されており、かつ内プレート２２の円形状のピン孔２７を貫通して延び出ている。 As shown in FIG. 2, the chain 13 is formed into an endless shape with first (outer) links 19 and second (inner) links 20 alternately connected by pins 23. As shown in FIG. 3, the first link 19 has an outer plate 21 and an inner plate 22, which are connected by a pin 23. The outer plates 21 are located at both ends of the pin in the axial direction (chain width direction), and a plurality of inner plates 22 are arranged between these outer plates 21 . The outer plate 21 has a pair of generally semicircular pin holes 25 and 26, and the inner plate 22 has a circular pin hole 27 and a generally semicircular pin hole 29 on the left and right sides. ing. The pin 23 is press-fitted and fixed into one pin hole 25 of the outer plate, and extends through a circular pin hole 27 of the inner plate 22.

第２リンク２０は、図４に示すように、外リンク１９と同様に、外プレート２１、内プレート２２及びピン２３を有し、外プレート２１は、ピン２３の軸方向（チェーン幅方向）両端に位置し、その一方のピン孔２５にピン２３が圧入・固定され、内プレート２２は、両外プレート２１の間において円形状のピン孔２７にピン２３を貫通して配置されている。第２（内）リンク２０の内プレート２２は、外リンク１９の内プレート２２より１枚少なく、従って第１（外）リンク１９の外プレート２１がチェーン１３の幅方向最両端に配置される。 As shown in FIG. 4, like the outer link 19, the second link 20 has an outer plate 21, an inner plate 22, and a pin 23, and the outer plate 21 is located at both ends of the pin 23 in the axial direction (chain width direction). A pin 23 is press-fitted and fixed into one of the pin holes 25 , and the inner plate 22 is disposed between both outer plates 21 with the pin 23 passing through a circular pin hole 27 . The number of inner plates 22 of the second (inner) link 20 is one less than the number of inner plates 22 of the outer link 19, so the outer plate 21 of the first (outer) link 19 is disposed at the extreme ends of the chain 13 in the width direction.

第１リンク１９は、一方のピン２３が外プレート２１の一方（前方）のピン孔２５に圧入・固定され、該ピン２３が多数枚の内プレート２２のピン孔２７を軸方向に移動可能に嵌挿するが、該内プレート２２の一方のピン孔２７の外側面にピン２３の円弧面が密着して伝動引張力を担持すると共に、ピン２３と回転方向一体に連結する。第２リンク２０も上記外リンク１９と同様に、一方のピン２３が外プレート２１の一方のピン孔２５に圧入・固定され、かつ該ピン２３が内プレート２２の一方のピン孔２７に伝動引張力を担持すべく回転方向一体に連結すると共に軸方向移動可能に嵌合する。 In the first link 19, one pin 23 is press-fitted and fixed into one (front) pin hole 25 of the outer plate 21, and the pin 23 is movable in the axial direction through the pin holes 27 of a large number of inner plates 22. When inserted, the arcuate surface of the pin 23 is in close contact with the outer surface of one pin hole 27 of the inner plate 22 to carry a transmitted tensile force and to be integrally connected to the pin 23 in the rotational direction. Similarly to the outer link 19, one pin 23 of the second link 20 is press-fitted and fixed into one pin hole 25 of the outer plate 21, and the pin 23 is inserted into one pin hole 27 of the inner plate 22 by transmission tension. They are connected integrally in the rotational direction to carry a force and are fitted together so as to be movable in the axial direction.

そして、第２リンク２０における外プレート２１の他方（後方）のピン孔２６の幅方向外側に、第１リンク１９の一方（前方）のピン孔２５が重なるように位置して、第２リンク２０の内プレート２２と第１リンク１９の内プレート２２を交互に配置して、第１リンク１９と第２リンク２０とが１ピッチずれてピン２３により連結される。第１リンク１９における外プレート２１の一方（前方）のピン孔２５及び内プレート２２の一方（前方）のピン孔２７に回転方向一体のピン２３は、第２リンク２０における外プレート２１の他方（後方）のピン孔２６及び内プレート２２の他方（後方）のピン孔２９に所定量転動可能に嵌合し、同様に第２リンク２０における外プレート２１の一方（前方）のピン孔２５及び内プレート２２の一方（前方）のピン孔２７に回転方向一体のピン２３は、第１リンク１９における外プレート２１の他方（後方）のピン孔２６及び内プレート２２の他方（後方）のピン孔２９に所定量転動可能に嵌合する。これにより、第１リンク１９と第２リンク２０とは、それぞれ他方（後方）のピン孔２６，２９とピン２３との転動により、所定量屈曲可能となる。 One (front) pin hole 25 of the first link 19 is positioned so as to overlap the other (rear) pin hole 26 of the outer plate 21 of the second link 20 in the width direction, and the second link 20 The inner plates 22 of the first links 19 and the inner plates 22 of the first links 19 are arranged alternately, and the first links 19 and the second links 20 are connected by pins 23 with a one pitch shift. A pin 23 that is integral in the rotational direction with a pin hole 25 on one (front) side of the outer plate 21 of the first link 19 and a pin hole 27 on one side (front side) of the inner plate 22 is connected to the pin hole 23 on the other side (the front side) of the outer plate 21 on the second link 20 . The second link 20 is fitted into the pin hole 26 (rear) and the other (rear) pin hole 29 of the inner plate 22 so as to be rotatable by a predetermined amount, and similarly, the pin hole 25 and the other (front) pin hole 25 of the outer plate 21 in the second link 20 The pin 23, which is rotationally integral with one (front) pin hole 27 of the inner plate 22, is connected to the other (rear) pin hole 26 of the outer plate 21 in the first link 19 and the other (rear) pin hole of the inner plate 22. 29 so that it can roll by a predetermined amount. Thereby, the first link 19 and the second link 20 can be bent by a predetermined amount by rolling of the pin 23 and the other (rear) pin holes 26 and 29, respectively.

前記ピン２３は、図５（ａ）に示すように、所定長さＬを有し、左右の両端は、前記無段変速装置（ＣＶＴ）１０の各シーブ１４，１５，１６，１７に当接するように所定角θの傾斜面２３ｃからなる。該ピン２３の断面形状は、図５（ｂ）に示すように、左右非対称からなり、一方面（側）２３ａは、従来の円形ピンと同様な半径Ｒ１からなる円弧面からなり、他方面（側）２３ｂは、ピン孔２６，２９の転動域に転動して接する比較的大きな半径Ｒ２からなる円弧面からなる。なお、一方面２３ａは、内プレート２２の一方のピン孔２７の端側円弧面Ｇ（図６（ｂ）参照）に密接し得る円弧面からなるが、該ピン２３は、内プレート２２（及び圧入される外プレート２１）に対して回転方向一体になるので、単一半径Ｒ１でなくてもよく、強度要件に合わせ複合Ｒ形状、連続して変化する半径からなる徐変Ｒ形状、Ｒ形状と直線とが混在する形状、楕円等の二次曲線形状等の他の形状でもよい。また、上記ピン２３の他方面２３ｂは、ピン孔２６，２７の転動域と転動する転動面を構成し、単一半径Ｒ２の円弧面に限らず、複合Ｒ形状、徐変Ｒ形状、Ｒ形状と直線とが混在する形状、二次曲線形状等の他の形状でもよい。 The pin 23 has a predetermined length L, as shown in FIG. It consists of an inclined surface 23c having a predetermined angle θ. The cross-sectional shape of the pin 23 is asymmetrical as shown in FIG. ) 23b is an arcuate surface having a relatively large radius R2 that rolls into contact with the rolling area of the pin holes 26 and 29. Note that the one surface 23a is an arcuate surface that can be brought into close contact with the end-side arcuate surface G (see FIG. 6(b)) of one pin hole 27 of the inner plate 22; Since it is integrated in the rotational direction with the outer plate 21) that is press-fitted, it does not need to have a single radius R1, but can be formed into a composite R shape according to strength requirements, a gradually changing R shape consisting of a continuously changing radius, or an R shape. Other shapes such as a shape in which a straight line and a straight line are mixed, a quadratic curve shape such as an ellipse, etc., may also be used. The other surface 23b of the pin 23 constitutes a rolling surface that rolls with the rolling region of the pin holes 26 and 27, and is not limited to a circular arc surface with a single radius R2, but also has a compound R shape and a gradually changing R shape. , a shape in which a rounded shape and a straight line coexist, a quadratic curve shape, and other shapes may be used.

前記第１リンク１９及び第２リンク２０の外プレート２１は、図６（ａ）に示すように、一方（前方）のピン孔２５及び他方（後方）のピン孔２６を有する。一方のピン孔２５は、上記ピン２３を圧入して固定するものであり、ピン２３の断面形状より僅かに小さい相似形状からなる。なお。該一方のピン孔２５は、ピン２３を圧入して固定するためにピン断面と同形状としたが、ピン２３は、圧入以外にも溶接等の他の方法で固定することも可能であり、この場合、該一方のピン孔２５は、他の形状でもよい。他方のピン孔２６は、ピン２３と転動し得る形状からなり、内プレート２２の他方のピン孔２９も同形状からなる。該他方のピン孔２６，２９の内側面（一方側）Ｅは、ピン２３との転動を妨げない形状であればよく、ピン２３の一方面２３ａの半径Ｒ１より僅かに大きい半径Ｒ３の円弧面が好ましい。なお、該内側面Ｅは、どのような形状でもよく、一方のピン孔２５，２７と繋がる形状でもよい。 The outer plates 21 of the first link 19 and the second link 20 have one (front) pin hole 25 and the other (rear) pin hole 26, as shown in FIG. 6(a). One pin hole 25 is for press-fitting and fixing the pin 23, and has a similar shape that is slightly smaller than the cross-sectional shape of the pin 23. In addition. The one pin hole 25 was made to have the same shape as the pin cross section in order to press fit and fix the pin 23, but the pin 23 can also be fixed by other methods such as welding other than press fitting. In this case, the one pin hole 25 may have another shape. The other pin hole 26 has a shape that can roll with the pin 23, and the other pin hole 29 of the inner plate 22 also has the same shape. The inner surface (one side) E of the other pin holes 26 and 29 may have any shape as long as it does not prevent rolling with the pin 23, and may be an arc with a radius R3 slightly larger than the radius R1 of the one surface 23a of the pin 23. A surface is preferred. Note that the inner surface E may have any shape, and may be connected to one of the pin holes 25 and 27.

該他方のピン孔２６，２９の外側面（他方側）Ｆは、ピン２３の転動面（他方面）２３ｂと転動する転動域となり、チェーン１３は、内径方向の屈曲が大きく、詳細は、後述するが、長手方向中心線Ｘ－Ｘに直交する下側（チェーン外径側）が拡がるように傾斜する直線形状からなる。該外側面（転動域）Ｆは、上記ピン２３の転動面（他方面）２３ｂと転動する形状であればよく、該ピン転動面２３ｂが半径Ｒ２の円弧面からなることにより直線形状としたが、ピン転動面２３ｂの形状に合せて、複合Ｒ形状、徐変Ｒ形状、Ｒ形状と直線とが混在する形状、二次曲線形状等の他の形状でもよい。 The outer surface (other side) F of the other pin holes 26, 29 becomes a rolling region that rolls with the rolling surface (other surface) 23b of the pin 23, and the chain 13 has a large bend in the inner radial direction, and As will be described later, the chain has a linear shape that is inclined so that the lower side (outer diameter side of the chain) perpendicular to the longitudinal center line XX is widened. The outer surface (rolling area) F has only to have a shape that rolls with the rolling surface (other surface) 23b of the pin 23, and since the pin rolling surface 23b is an arcuate surface with radius R2, it can be formed in a straight line. However, other shapes such as a compound R shape, a gradually changing R shape, a shape in which an R shape and a straight line are mixed, a quadratic curve shape, etc. may be used in accordance with the shape of the pin rolling surface 23b.

内プレート２２の一方（前方）のピン孔２７は、生産性の良好な円（丸）形状となっているが、該ピン孔２７の外側面Ｇは、ピン２３の一方面２３ａに整合して伝達引張力（荷重）を担持する部分であり、ピン一方面２３ａの半径Ｒ１と同等の半径からなる円弧面が好ましい。該ピン孔２７の内側面Ｈは、内プレート２２をピン２３に対して軸方向に摺動可能とする余裕を持たせればよく、ピン２３と接する（荷重を伝達する）ことがなく、例えばピン２３の他方面２３ｂの半径Ｒ２より僅かに大きい半径の円弧面、直線、その他どのような形状でもよい。 The pin hole 27 on one side (front side) of the inner plate 22 has a circular shape with good productivity, but the outer surface G of the pin hole 27 is aligned with the one side 23a of the pin 23. It is a portion that carries the transmitted tensile force (load), and is preferably an arcuate surface having a radius equivalent to the radius R1 of the pin one side 23a. The inner surface H of the pin hole 27 only needs to have a margin that allows the inner plate 22 to slide in the axial direction relative to the pin 23, and does not come into contact with the pin 23 (transmit load). It may be a circular arc surface with a radius slightly larger than the radius R2 of the other surface 23b of 23, a straight line, or any other shape.

図７は、直線状態にあるチェーン１３を示す図で、第１リンク１９と第２リンク２０とがピン２３で連結している。第１リンク１９（外、内プレート２１，２２及びピン２３）は、ハッチングで示されており、その外プレート２１（及び内プレート２２）の一方（前方）のピン孔２５（２７）にピン２３が回転不能に結合されている。第２リンク２０の外プレート２１（及び内プレート２２）の他方（後方）のピン孔２６（２９）に上記ピン２３が転動自在に嵌合している。他方のピン孔２６（２９）は、図７（ｂ）に示すように、上下（プレート幅）方向Ｙに対して下方が拡がる方向に傾斜した直線からなる転動域（外側面）Ｆからなり、ピン２３の転動面（他側面）２３ｂは、大きな半径Ｒ２の円弧面からなる。チェーン直線状態にあって、転動域（外側面）Ｆの上方側（チェーン内径側）位置ｄにてピン転動面２３ｂに接触している。上記転動域Ｆは、上記接触位置ｄから上方（チェーン内径側）が所定角αであり、上記接触位置ｄから下方（チェーン外径側）が所定角βであり、上記所定角の合計（α＋β）がチェーン１３の屈曲角γとなる。下方（外径側）の角βは、チェーン１３が巻掛け内径方向に屈曲する際の屈曲角となり、上方（内径側）の角αは、チェーンの巻掛け外径方向の屈曲角となる。上記接触位置ｄにおける上下方向線Ｙと、一方（前方）のピン２３の後端面における上下方向線Ｙとの間隔がチェーンピッチＰとなる（図６参照）。 FIG. 7 is a diagram showing the chain 13 in a straight state, in which the first link 19 and the second link 20 are connected by a pin 23. As shown in FIG. The first link 19 (outer and inner plates 21, 22 and pin 23) is shown by hatching, and the pin 23 is inserted into the pin hole 25 (27) in one (front) of the outer plate 21 (and inner plate 22). are non-rotatably connected. The pin 23 is rotatably fitted into the other (rear) pin hole 26 (29) of the outer plate 21 (and inner plate 22) of the second link 20. As shown in FIG. 7(b), the other pin hole 26 (29) consists of a rolling region (outer surface) F consisting of a straight line inclined in a direction in which the lower side widens with respect to the vertical (plate width) direction Y. The rolling surface (other side surface) 23b of the pin 23 is an arcuate surface with a large radius R2. The chain is in a straight state, and is in contact with the pin rolling surface 23b at a position d on the upper side (inner diameter side of the chain) of the rolling region (outer surface) F. The rolling area F has a predetermined angle α above the contact position d (on the inner diameter side of the chain), a predetermined angle β below the contact position d (on the outer diameter side of the chain), and the sum of the predetermined angles ( α+β) is the bending angle γ of the chain 13. The lower (outer diameter side) angle β is the bending angle when the chain 13 is bent in the inner diameter direction, and the upper (inner diameter side) angle α is the bending angle in the outer diameter direction of the chain. The distance between the vertical line Y at the contact position d and the vertical line Y at the rear end surface of one (front) pin 23 is the chain pitch P (see FIG. 6).

図８は、チェーン１３が巻掛け方向の内径側に屈曲した状態を示す。第１リンク１９の外及び内プレート２１，２２は、ピン２３と共に上方（反時計方向）に屈曲し、ピン２３は、その転動面２３ｂをピン孔２６，２９の転動域Ｆを転がりつつ接触点を下方向に移動し、第２リンク２０に対して第１リンク１９が上方に屈曲する。この際、図８（ｂ）に示すように、ピン２３の一方面２３ａの円弧面Ｒ１とピン孔２６，２９の円弧面Ｒ３からなる内側面Ｅとは、相対移動可能なようになっている。 FIG. 8 shows a state in which the chain 13 is bent toward the inner diameter side in the winding direction. The outer and inner plates 21 and 22 of the first link 19 are bent upward (counterclockwise) together with the pin 23, and the pin 23 is rolled on its rolling surface 23b in the rolling area F of the pin holes 26 and 29. The contact point is moved downward, and the first link 19 is bent upward with respect to the second link 20. At this time, as shown in FIG. 8(b), the arcuate surface R1 of one surface 23a of the pin 23 and the inner surface E consisting of the arcuate surface R3 of the pin holes 26 and 29 are movable relative to each other. .

チェーン１３の内径方面（巻掛け方向）に大きく屈曲するように、上記他方（後方）のピン孔２６，２９の転動域（外方面）Ｆは、下方（外径側）角βが上方（内径側）角αより大きくなっている。上記角の合計（α＋β）がチェーンの屈曲角γである。該チェーンの屈曲面γが大きくなると、ピン２３の転動面２３ｂの半径Ｒ２が小さくなり、ピン転動面とピン孔転動域との接触面圧が増加し、チェーン強度が低下するため、ピン転動面２３ｂの半径Ｒ２は、大きい方が望ましい。チェーン１３は、原動側及び従動側プーリに巻付くため、巻掛け方向の屈曲角を、反対方向の屈曲角に比して大きくして、チェーン使用状態における必要屈曲角を保持しつつ、全体屈曲角γを可能な限り小さくして、下方（外径側）角βと上方（内径側）角αとを適切な割合としている。これにより、上記屈曲角β，αを適正に設定して、全体屈曲角γを最小限としてピン転動面２３ｂの半径Ｒ２を可能な限り大きくしてある。 The rolling area (outer side) F of the other (rear) pin holes 26, 29 has a lower (outer side) angle β such that the chain 13 is largely bent in the inner diameter direction (winding direction). (inner diameter side) is larger than the angle α. The sum of the above angles (α+β) is the bending angle γ of the chain. As the bending surface γ of the chain becomes larger, the radius R2 of the rolling surface 23b of the pin 23 becomes smaller, the contact pressure between the pin rolling surface and the pin hole rolling region increases, and the chain strength decreases. It is desirable that the radius R2 of the pin rolling surface 23b is larger. Since the chain 13 wraps around the driving side and driven side pulleys, the bending angle in the winding direction is made larger than the bending angle in the opposite direction, so that the chain 13 can be bent as a whole while maintaining the required bending angle when the chain is in use. The angle γ is made as small as possible, and the lower (outer diameter side) angle β and the upper (inner diameter side) angle α are set at an appropriate ratio. As a result, the bending angles β and α are appropriately set, the overall bending angle γ is minimized, and the radius R2 of the pin rolling surface 23b is made as large as possible.

なお、上記実施の形態では、プレートのピン孔２６，２９の転動域Ｆを幅方向線Ｙに対して角度を持たせたが、これは、ピン２３の転動面２３ｂに角度を持たせてもよい。また、上記実施の形態は、プレートのピン孔２６，２９の転動域を直線形状としているが、これは、チェーン直線状態でのピンと接する部分ｄを直線形状とし、チェーンが屈曲するに従いＲを径変させるような形状等の他の形状でもよい。 In the above embodiment, the rolling area F of the pin holes 26 and 29 of the plate is made to have an angle with respect to the width direction line Y, but this is because the rolling surface 23b of the pin 23 is given an angle You can. Further, in the above embodiment, the rolling range of the pin holes 26 and 29 of the plate is linear, but this means that the portion d in contact with the pin in a straight chain state is linear, and as the chain bends, the radius increases. Other shapes such as a shape that changes the diameter may also be used.

図９は、外及び内プレート２１，２２の他方（後方）のピン孔２６，２９部分の構造を示す。上述した通り、上記他方のピン孔２６，２９の外側面（他方側）である転動域Ｆは、幅方向線Ｙに対して傾斜している。チェーン１３は、直線状態にある場合、最も引張力が作用する。該引張力が直線状態の接触位置ｄに作用すると、上述したように外方角αと内方角βとが相違している（α＜β）ため、接触位置ｄからの転動域（外方面）Ｆの長さＬ２，Ｌ３が相違する。即ち、内径側の長さＬ２が外径側の長さＬ３より小さくなり（Ｌ２＜Ｌ３）、このためプレート端部の応力に差異が生じる。このため、本実施の形態では、プレート端部の危険断面長さを、内径側長さＬ４が外径側長さＬ５より大きくして（Ｌ４＞Ｌ５）、上述した応力の差異に対抗するように、内径側（Ｌ４）の引張り強度を外径側（Ｌ５）より大きくして、外プレート２１及び内プレート２２の引張り強度を保持する。 FIG. 9 shows the structure of the other (rear) pin holes 26, 29 of the outer and inner plates 21, 22. As described above, the rolling region F, which is the outer surface (the other side) of the other pin holes 26 and 29, is inclined with respect to the width direction line Y. The most tensile force acts on the chain 13 when it is in a straight line. When the tensile force acts on the contact position d in a straight line, the rolling range (outer side) from the contact position d is caused by the difference between the outer angle α and the inner angle β (α<β) as described above. The lengths L2 and L3 of F are different. That is, the length L2 on the inner diameter side is smaller than the length L3 on the outer diameter side (L2<L3), which causes a difference in stress at the end of the plate. For this reason, in this embodiment, the length of the dangerous section at the end of the plate is set so that the length L4 on the inner diameter side is larger than the length L5 on the outer diameter side (L4>L5) to counteract the above-mentioned difference in stress. In addition, the tensile strength of the inner diameter side (L4) is made larger than that of the outer diameter side (L5) to maintain the tensile strength of the outer plate 21 and the inner plate 22.

図１０に示すように、本実施の形態によるチェーン１３の外及び内プレート２１，２２は、他方（後方）のピン孔２６，２９が概ね半円形状からなり、従って図１１に示す従来のチェーン１のプレート３より、危険断面長さＡに相当する長さ分短くなる。これにより、所定引張り力を保持しつつ、チェーンピッチを短縮化し、チェーンの静粛化を可能とする。 As shown in FIG. 10, the outer and inner plates 21, 22 of the chain 13 according to the present embodiment have pin holes 26, 29 on the other side (rear side) having a generally semicircular shape. It is shorter than the plate 3 of No. 1 by a length corresponding to the critical section length A. This allows the chain pitch to be shortened while maintaining a predetermined tensile force, making it possible to make the chain quieter.

なお、上述した実施の形態は、無段変速装置（ＣＶＴ）用チェーンとして説明したが、これに限らず、本チェーンを他の装置に適用することも可能である。また、ピンの断面形状、外プレート及び内プレートのピン孔形状は、必ずしも実施の形態で説明した形状に限らず、他の形状でもよく、特に内プレート２２の一方のピン孔２７は、円形以外の形状、例えば内側面Ｈは、どのような形状でもよい。また、外プレート及び内プレートにおけるピンを固定又は一体に回転する一方のピン孔を前方のピン孔とし、転動域を有する他方のピン孔を後方のピン孔としたが、これは、後方のピン孔を、ピンを固定又は一体に回転する一方のピン孔とし、前方のピン孔を、転動域を有する他方のピン孔としてもよい。 In addition, although the embodiment mentioned above was demonstrated as a chain for continuously variable transmission (CVT), it is also possible to apply this chain not only to this but to other apparatuses. Further, the cross-sectional shape of the pin and the shape of the pin holes in the outer plate and the inner plate are not necessarily limited to the shapes described in the embodiment, but may be other shapes. In particular, one pin hole 27 of the inner plate 22 may have a shape other than circular For example, the shape of the inner surface H may be any shape. In addition, one of the pin holes in the outer plate and the inner plate where the pins are fixed or rotated together is the front pin hole, and the other pin hole that has a rolling area is the rear pin hole. The pin hole may be one pin hole in which the pin is fixed or rotated together, and the front pin hole may be the other pin hole having a rolling region.

１０ 無段変速装置（ＣＶＴ）
１１，１２ プーリ
１３ チェーン
１４，１５，１６，１７ シーブ
１９ 第１（外）リンク
２０ 第２（内）リンク
２１ 外プレート
２２ 内プレート
２３ ピン
２３ａ 一方側（Ｒ１円弧面）
２３ｂ 他方側（転動面）
２３ｃ 傾斜面
２５，２７ 一方のピン孔
２６，２９ 他方のピン孔
Ｅ 一方側（円弧面）
Ｆ 他方側（転動域）
ｄ 接触位置 10 Continuously variable transmission (CVT)
11, 12 Pulley 13 Chain 14, 15, 16, 17 Sheave 19 First (outer) link 20 Second (inner) link 21 Outer plate 22 Inner plate 23 Pin 23a One side (R1 arc surface)
23b Other side (rolling surface)
23c Inclined surfaces 25, 27 One pin hole 26, 29 Other pin hole E One side (arc surface)
F Other side (rolling area)
d Contact position

Claims (6)

それぞれ外プレート及び内プレートを有する第１リンクと第２リンクとを、前記外プレート及び内プレートに形成した１対のピン孔にピンを貫通して交互にかつ無端状に連結してなるチェーンにおいて、
前記ピンの断面形状は、転動面を有する非対称形状からなり、
前記第１リンク及び前記第２リンクは、前記外プレートを幅方向両端に配置し、複数枚の前記内プレートを前記外プレートの間に配置し、
前記第１リンク及び前記第２リンクにおける外プレートの一方のピン孔に前記ピンを固定すると共に内プレートの一方のピン孔に該ピンを一体に回転するように嵌挿し、
前記第１リンク及び前記第２リンクにおける外プレート及び内プレートの他方のピン孔に前記ピンの転動面を転動自在に嵌挿し、
前記第１リンク及び前記第２リンクの外プレートは、同じ形状からなり、
前記第１リンク及び前記第２リンクの内プレートは、同じ形状からなり、
前記外プレート及び前記内プレートの他方のピン孔は、一方側が円弧面からなり、他方側が前記ピンの転動面に転動する転動域からなる概ね半円形状からなる、
ことを特徴とするチェーン。 A chain in which a first link and a second link each having an outer plate and an inner plate are connected alternately and endlessly by passing pins through a pair of pin holes formed in the outer plate and the inner plate. ,
The cross-sectional shape of the pin is an asymmetrical shape having a rolling surface,
In the first link and the second link, the outer plate is arranged at both ends in the width direction, and a plurality of the inner plates are arranged between the outer plates,
fixing the pin in one pin hole of the outer plate of the first link and the second link, and fitting the pin into one pin hole of the inner plate so as to rotate together;
The rolling surface of the pin is rotatably inserted into the other pin hole of the outer plate and the inner plate in the first link and the second link ,
The outer plates of the first link and the second link have the same shape,
The inner plates of the first link and the second link have the same shape,
The other pin hole of the outer plate and the inner plate has a generally semicircular shape, with one side consisting of an arcuate surface and the other side consisting of a rolling area that rolls on the rolling surface of the pin.
A chain characterized by: 前記ピンの両端面は、無段変速装置のＶプーリのシーブに当接する傾斜面からなる、
請求項１記載のチェーン。 Both end surfaces of the pin are sloped surfaces that come into contact with a sheave of a V-pulley of a continuously variable transmission.
The chain according to claim 1. 前記ピンの断面形状は、一方側が所定半径の円弧面であり、前記転動面である他方側が前記所定半径より大きな半径からなる円弧面である概ね半円形状からなり、
前記外プレート及び前記内プレートにおける他方のピン孔の前記転動域である他方側が直線形状である、
請求項１又は２記載のチェーン。 The cross-sectional shape of the pin is approximately semicircular, with one side being an arcuate surface having a predetermined radius, and the other side, which is the rolling surface, being an arcuate surface having a radius larger than the predetermined radius;
The other side, which is the rolling area, of the other pin hole in the outer plate and the inner plate has a linear shape;
The chain according to claim 1 or 2 . 前記外プレート及び前記内プレートにおける前記他方のピン孔の転動域である他方側が、チェーンの外径方向に向って拡がるように傾斜してなり、
前記他方のピン孔の転動域である他方側は、チェーンの直線状態におけるピン転動面との接触位置に対して前記チェーンの内径側に比して外径側が広い、
請求項１乃至３のいずれか１項記載のチェーン。 The other side of the outer plate and the inner plate, which is the rolling area of the other pin hole, is inclined so as to expand in the outer radial direction of the chain,
The other side, which is the rolling area of the other pin hole, has a wider outer diameter side than the inner diameter side of the chain with respect to the contact position with the pin rolling surface when the chain is in a straight state.
A chain according to any one of claims 1 to 3. 前記外プレート及び前記内プレートの前記他方のピン孔側の危険断面長さは、前記チェーンの外径側に比して内径側が長い、
請求項４記載のチェーン。 The dangerous cross section length of the other pin hole side of the outer plate and the inner plate is longer on the inner diameter side than on the outer diameter side of the chain,
The chain according to claim 4 . 前記第１リンク及び前記第２リンクにおける前記外プレートの一方のピン孔は、前記ピンを圧入して固定してなる、
請求項１ないし５のいずれか１項記載のチェーン。 One pin hole of the outer plate of the first link and the second link is formed by press-fitting and fixing the pin,
A chain according to any one of claims 1 to 5 .
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