JP2008045585A - Transmission belt block and transmission belt - Google Patents

Transmission belt block and transmission belt Download PDF

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JP2008045585A
JP2008045585A JP2006219264A JP2006219264A JP2008045585A JP 2008045585 A JP2008045585 A JP 2008045585A JP 2006219264 A JP2006219264 A JP 2006219264A JP 2006219264 A JP2006219264 A JP 2006219264A JP 2008045585 A JP2008045585 A JP 2008045585A
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block
transmission belt
power transmission
transmission
end portion
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JP4934370B2 (en
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Hidehiko Aihara
英彦 相原
Masatoshi Haneda
雅敏 羽田
Mitsuhiko Takahashi
光彦 高橋
Ryuichi Kido
隆一 城戸
Hiroyuki Sakanaka
宏行 坂中
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Bando Chemical Industries Ltd
Aichi Machine Industry Co Ltd
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Bando Chemical Industries Ltd
Aichi Machine Industry Co Ltd
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Priority to JP2006219264A priority Critical patent/JP4934370B2/en
Priority to DE112007001858T priority patent/DE112007001858T5/en
Priority to PCT/JP2007/065550 priority patent/WO2008018514A1/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
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
    • F16G5/166—V-belts, i.e. belts of tapered cross-section consisting of several parts with non-metallic rings

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission belt block for maintaining good transmitting capability, and to provide a transmission belt using the same. <P>SOLUTION: Both friction contact faces 224 of the block 220 are each positioned so that a front end (a) of a front side face portion 224a is deviated by a predetermined distance α from a plate-thickness-direction center P of a block body 220a to the cross-direction inside of the block body 220a and a rear end (b) of a rear side face portion 224b is deviated by a predetermined distance β from the plate-thickness-direction center P of the block body 220a to the cross-direction outside of the bock body 220a. In this way, both friction contact faces 224 are each formed ranging from the front end (a) of the front side face portion 224a to the rear end (b) of the rear side face portion 224b so as to be curved into a gently concave shape as tending from the outward side toward the breadthwise inside of the block body 220a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車用無段変速機その他各種の無段変速機の伝動装置に採用される伝動ベルト用ブロック及びこのブロックを用いた伝動ベルトに関する。   The present invention relates to a transmission belt block employed in a transmission for an automobile continuously variable transmission and other various continuously variable transmissions, and a transmission belt using the block.

従来、ベルト式無段変速機の伝動装置において、下記特許文献１にて示すように、ブロックが、プーリ間に噛み込まれる時およびプーリ間から解離する時には、応力がブロックの角部に集中する。この応力集中を緩和するため、ブロックのプーリとの接触面に、ブロックの厚み方向に凸のクラウニングを形成する技術が提案されている。
特開２０００−３１０２９４号公報 2. Description of the Related Art Conventionally, in a transmission device for a belt-type continuously variable transmission, as shown in Patent Document 1 below, when a block is engaged between pulleys and dissociated from between pulleys, stress concentrates on the corners of the block. . In order to alleviate this stress concentration, a technique has been proposed in which a crowning convex in the thickness direction of the block is formed on the contact surface of the block with the pulley.
JP 2000-310294 A

しかしながら、上述の技術において、ブロックが、プーリからの挟持力に伴い、幅方向内側に向けてつぶれるように変形すると、プーリの間隔はブロックの変形分さらに狭くなる。   However, in the above-described technique, when the block is deformed so as to be crushed toward the inner side in the width direction with the clamping force from the pulley, the interval between the pulleys is further narrowed by the deformation of the block.

従って、当該ブロックがその設計時にプーリに噛み込まれる位置としていた想定位置（以下、基準噛み込み位置ともいう）に対してベルト進行方向手前の位置にて前傾した状態でプーリに噛み込まれる。その結果、プーリが円錐形状であることから、ブロックの動力伝動面での面圧が不均一となり、伝動ベルトの耐久性や伝動能力に影響を及ぼす。   Therefore, the block is caught in the pulley in a state where it is tilted forward at a position in front of the belt traveling direction with respect to an assumed position (hereinafter also referred to as a reference biting position) which is a position where the block is bitten by the design. As a result, since the pulley has a conical shape, the surface pressure on the power transmission surface of the block becomes non-uniform, which affects the durability and transmission capability of the transmission belt.

そこで、本発明は、良好な伝動能力を維持するようにした伝動ベルト用ブロック及びこのブロックを用いた伝動ベルトを提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission belt block that maintains a good transmission capability and a transmission belt using the block.

上記課題の解決にあたり、本発明に係る伝動ベルト用ブロックは、請求項１の記載によれば、
互いに同軸的に位置する両プーリ部材（１１０、１２０）の両円錐状対向面に対し両動力伝動面（２２４、２２５、２２６）として対向する幅方向両端面を備える。 In solving the above-described problems, the transmission belt block according to the present invention is as described in claim 1.
Both end faces in the width direction are opposed as both power transmission surfaces (224, 225, 226) to both conical facing surfaces of both pulley members (110, 120) positioned coaxially.

さらに、当該伝動ベルト用ブロックにおいて、上記両動力伝動面は、伝動ベルト進行方向の一端部（ａ、ｃ、ｅ）から他端部（ｂ、ｄ、ｆ）にかけて、上記両円錐状対向面との間にて面圧を均一に発生可能な形状に形成されていることを特徴とする。   Further, in the transmission belt block, the two power transmission surfaces are formed from the two conical opposing surfaces from one end (a, c, e) to the other end (b, d, f) in the transmission belt traveling direction. It is formed in the shape which can generate | occur | produce a surface pressure uniformly between.

この特徴を有することにより、上述のようにブロックが基準噛み込み位置よりもベルト進行方向手前の位置にて噛み込まれる場合であっても、ブロックの両動力伝動面に生ずる面圧が局所的に増大することがない。その結果、各ブロックの耐久性が向上するとともに、当該伝動ベルトとしての伝動能力を良好に維持し得る。   By having this feature, even when the block is bitten at a position before the reference biting position before the belt biting direction as described above, the surface pressure generated on both power transmission surfaces of the block is locally increased. There is no increase. As a result, the durability of each block is improved, and the transmission capability as the transmission belt can be well maintained.

また、本発明に係る伝動ベルト用ブロックは、請求項２の記載によれば、
互いに同軸的に位置する両プーリ部材（１１０、１２０）の両円錐状対向面に対し対向する幅方向両端面を有する板状ブロック本体（２２０ａ）と、
このブロック本体の少なくとも上記両幅方向端面を被覆するように樹脂材料でもって形成し、その両幅方向端面を上記両円錐状対向面に対し摩擦接触可能に対向する両動力伝動面（２２４、２２５、２２６）として有する被覆部材（２２０ｂ）とを備える。 Moreover, according to the description of claim 2, the transmission belt block according to the present invention,
A plate-like block body (220a) having both end faces in the width direction opposed to both conical opposing faces of both pulley members (110, 120) positioned coaxially;
Both power transmission surfaces (224, 225) are formed of a resin material so as to cover at least the both widthwise end surfaces of the block body, and both widthwise end surfaces are opposed to the both conical facing surfaces so as to be in frictional contact. 226) as a covering member (220b).

さらに、当該伝動ベルト用ブロックにおいて、被覆部材は、上記両動力伝動面の伝動ベルト進行方向の一端部（ａ、ｃ、ｅ）から他端部（ｂ、ｄ、ｆ）にかけて、上記両円錐状対向面との間にて面圧を均一に発生可能な形状に形成されていることを特徴とする。   Further, in the transmission belt block, the covering member is formed in the shape of both the cones from one end (a, c, e) to the other end (b, d, f) in the transmission belt traveling direction of the both power transmission surfaces. It is formed in the shape which can generate | occur | produce a surface pressure uniformly between opposing surfaces.

このように、板状ブロック本体の上記両幅方向端面を被覆部材でもって被覆し、この被覆部材の両幅方向端面を、請求項１に記載する両動力伝動面として形成するようにしても、請求項１に記載の発明と同様の作用効果が達成され得る。   Thus, the both width direction end faces of the plate-like block body are covered with the covering member, and both width direction end faces of the covering member are formed as the both power transmission surfaces described in claim 1. The same effect as that of the first aspect of the invention can be achieved.

また、本発明は、請求項３の記載によれば、請求項１または２に記載の伝動ベルト用ブロックにおいて、上記両動力伝動面は、伝動ベルト進行方向の一端部にて、上記両円錐状対向面との間にて面圧を均一に発生するに適した距離（α＋β、γ、δ）だけ、他端部よりも、ブロック中心側またはその反対側にずれて位置することを特徴とする。   According to a third aspect of the present invention, there is provided the transmission belt block according to the first or second aspect, wherein the two power transmission surfaces are formed in the conical shape at one end in the transmission belt traveling direction. It is characterized by being shifted from the other end to the block center side or the opposite side by a distance (α + β, γ, δ) suitable for uniformly generating a surface pressure between the opposing surfaces. .

これによれば、ブロックが基準噛み込み位置よりもベルト進行方向手前の位置で噛み込まれても、両動力伝動面はその全面に亘り上記両円錐状対向面と接触するので、両動力伝動面にて上記両円錐状対向面から受ける面圧がより一層、均一になる。その結果、請求項１または２に記載の発明の作用効果がより一層向上され得る。   According to this, even if the block is bitten at a position before the reference biting position in the belt traveling direction, both power transmission surfaces are in contact with the both conical facing surfaces over the entire surface, so both power transmission surfaces are The surface pressure received from the two conical opposing surfaces becomes even more uniform. As a result, the operational effect of the invention according to claim 1 or 2 can be further improved.

また、本発明は、請求項４の記載によれば、請求項１〜３のいずれか１つに記載の伝動ベルト用ブロックにおいて、上記両動力伝動面は、伝動ベルト進行方向で凹形状に形成されていることを特徴とする。   According to a fourth aspect of the present invention, in the transmission belt block according to any one of the first to third aspects, the both power transmission surfaces are formed in a concave shape in the traveling direction of the transmission belt. It is characterized by being.

これによれば、両動力伝動面を上述のように凹形状とすることで、両動力伝動面にて上記両円錐状対向面から受ける面圧がより一層、均一になる。その結果、請求項１〜３のいずれか１つに記載の発明の作用効果がより一層向上され得る。   According to this, by making the both power transmission surfaces concave as described above, the surface pressure received from the both conical opposing surfaces at both power transmission surfaces becomes even more uniform. As a result, the operational effects of the invention according to any one of claims 1 to 3 can be further improved.

また、本発明は、請求項５の記載によれば、請求項３に記載の伝動ベルト用ブロックにおいて、上記両動力伝動面は、伝動ベルト進行方向の一端部から他端部にかけて、上記両動力伝動面の外側に向け遠ざかるような段差形状に形成されていることを特徴とする。   According to a fifth aspect of the present invention, in the transmission belt block according to the third aspect, the both power transmission surfaces extend from one end portion to the other end portion in the transmission belt traveling direction. It is formed in the level | step difference shape which goes away toward the outer side of a transmission surface.

これによれば、両動力伝動面を段差形状とすることで、両動力伝動面にて上記両円錐状対向面から受ける面圧がより一層、均一になる。その結果、請求項３に記載の発明の作用効果がより一層向上する。更に、両動力伝動面が上述のような段差形状に形成されていることで、ブロックの製造が容易となる効果を奏する。   According to this, by making both the power transmission surfaces into a stepped shape, the surface pressure received from the both conical opposing surfaces at the both power transmission surfaces becomes even more uniform. As a result, the effect of the invention of claim 3 is further improved. Furthermore, since both the power transmission surfaces are formed in the stepped shape as described above, there is an effect that the manufacture of the block becomes easy.

また、本発明は、請求項６の記載によれば、請求項３に記載の伝動ベルト用ブロックにおいて、上記両動力伝動面は、伝動ベルト進行方向の一端部から他端部にかけて、テーパ形状に形成されていることを特徴とする。   According to a sixth aspect of the present invention, in the transmission belt block according to the third aspect, the power transmission surfaces are tapered from one end to the other end in the transmission belt traveling direction. It is formed.

これによれば、両動力伝動面をテーパ形状とすることで、両動力伝動面にて上記両円錐状対向面から受ける面圧がより一層、均一になる。その結果、請求項３に記載の発明の作用効果がより一層向上し得る。更に、両動力伝動面が上述のようなテーパ形状という単純な傾斜形状に形成されていることで、ブロックの製造が容易となる効果を奏する。   According to this, by making both the power transmission surfaces into a tapered shape, the surface pressure received from the both conical opposing surfaces at the both power transmission surfaces becomes even more uniform. As a result, the function and effect of the invention of claim 3 can be further improved. Furthermore, since both the power transmission surfaces are formed in a simple inclined shape such as a taper shape as described above, there is an effect that the manufacture of the block becomes easy.

また、本発明は、請求項７の記載によれば、請求項１〜６のいずれか１つに記載の伝動ベルト用ブロックにおいて、上記両動力伝動面は、伝動ベルト進行方向の一端部及び他端部の少なくとも一方にて、凸な湾曲形状に形成されていることを特徴とする。   According to a seventh aspect of the present invention, in the transmission belt block according to any one of the first to sixth aspects, the two power transmission surfaces include one end of the transmission belt traveling direction and the other. At least one of the end portions is formed in a convex curved shape.

これによれば、両動力伝動面が、伝動ベルト進行方向の一端部にて凸な湾曲形状に形成されていれば、ブロックが両プーリ部材に噛み込まれる際、当該ブロックは、上記両動力伝動面の各一端部によって、上記両円錐状対向面との間で応力集中を緩和しつつ円滑に接触する。その結果、請求項１〜６に記載の発明の作用効果がより一層向上され得る。   According to this, if the both power transmission surfaces are formed in a convex curved shape at one end portion in the transmission belt traveling direction, when the block is engaged with both pulley members, the block Each end of the surface makes smooth contact with the conical facing surfaces while relaxing stress concentration. As a result, the operational effects of the inventions according to claims 1 to 6 can be further improved.

また、上述のように両動力伝動面が、伝動ベルト進行方向の他端部にて凸な湾曲形状に形成されていれば、ブロックが上記両円錐状対向面から解離する際、当該ブロックは、上記両動力伝動面の各他端部により、上記両円錐状対向面との間で応力集中を緩和しつつ円滑に接触しながら当該両円錐状対向面から解離する。その結果、請求項１〜６に記載の発明の作用効果がより一層向上され得る。   Further, as described above, if both power transmission surfaces are formed in a convex curved shape at the other end portion in the transmission belt traveling direction, when the block dissociates from the both conical opposing surfaces, The other end portions of the two power transmission surfaces are dissociated from the conical facing surfaces while smoothly contacting the two conical facing surfaces while relaxing the stress concentration. As a result, the operational effects of the inventions according to claims 1 to 6 can be further improved.

なお、上述した「両動力伝動面は、伝動ベルト進行方向の一端部及び他端部の少なくとも一方にて、凸な湾曲形状に形成されている」との記載において、例えば、「両動力伝動面は、伝動ベルト進行方向の一端部にて、凸な湾曲形状に形成されている」とは、当該両動力伝動面とブロックの上記一端部側の幅方向端面とが凸な湾曲形状で接続されていることをいう。   In the above description, “both power transmission surfaces are formed in a convex curved shape at at least one of the one end and the other end in the direction of travel of the transmission belt”, for example, “both power transmission surfaces `` Is formed in a convex curved shape at one end in the transmission belt traveling direction '' means that both the power transmission surfaces are connected in a convex curved shape to the end surface in the width direction on the one end side of the block. It means that

また、本発明に係る伝動ベルトは、請求項８の記載によれば、無端状帯（２１０）と、請求項１〜７のいずれか１つに記載の複数の伝動ベルト用ブロック（２２０）を備える。   According to the description of claim 8, the transmission belt according to the present invention includes an endless belt (210) and a plurality of transmission belt blocks (220) according to any one of claims 1 to 7. Prepare.

ここで、当該複数のブロックは、それぞれ、両動力伝動面の伝動ベルト進行方向の一端部を他端部よりも無端状帯の進行方向側に位置させるように当該無端状帯に係止してなる。   Here, each of the plurality of blocks is engaged with the endless belt so that one end portion of both power transmission surfaces in the traveling direction of the transmission belt is positioned on the traveling direction side of the endless belt with respect to the other end portion. Become.

これによれば、請求項１〜７のいずれか１つに記載の発明の作用効果を達成し得る伝動ベルトの提供が可能となる。   According to this, it is possible to provide a transmission belt that can achieve the function and effect of the invention according to any one of claims 1 to 7.

なお、上記各手段の括弧内の符号は、後述する各実施形態に記載の具体的手段との対応関係を示す。   In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means as described in each embodiment mentioned later.

以下、本発明の各実施形態を図面により説明する。
（第１実施形態）
図１は、本発明が自動車用無段変速機の伝動装置Ｔに適用される第１実施形態を示している。当該伝動装置Ｔは、駆動プーリ１００及び従動プーリ（図示しない）に亘りＶベルト２００を巻装して構成されている。 Hereinafter, each embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a first embodiment in which the present invention is applied to a transmission T of a continuously variable transmission for an automobile. The transmission device T is configured by winding a V-belt 200 over a drive pulley 100 and a driven pulley (not shown).

図１にて示すごとく、駆動プーリ１００は、固定プーリ部材１１０及び可動プーリ部材１２０を備えている。可動プーリ部材１２０は、固定プーリ部材１１０の駆動軸１３０に軸動可能にかつ相対回転不能に支持されており、当該可動プーリ部材１２０は、その内面（対向面）にて、固定プーリ部材１１０の内面（対向面）に対向するように位置する。なお、固定プーリ部材１１０及び可動プーリ部材１２０の両対向面は、無段変速機の無段変速機能に対応するように、共に、円錐状に形成されている。   As shown in FIG. 1, the drive pulley 100 includes a fixed pulley member 110 and a movable pulley member 120. The movable pulley member 120 is supported by the drive shaft 130 of the fixed pulley member 110 so as to be axially movable and relatively non-rotatable. The movable pulley member 120 has an inner surface (opposing surface) of the fixed pulley member 110. It is located so as to face the inner surface (opposing surface). Both opposing surfaces of the fixed pulley member 110 and the movable pulley member 120 are formed in a conical shape so as to correspond to the continuously variable transmission function of the continuously variable transmission.

このように構成した駆動プーリ１００においては、可動プーリ部材１２０は、固定プーリ部材１１０に向かう推力を受けて、固定プーリ部材１１０側へ軸動することにより、固定プーリ部材１１０及び可動プーリ部材１２０の両対向面の間隔（以下、対向面間隔ともいう）を減少させる。また、可動プーリ部材１２０は、上記推力の減衰に伴い、固定プーリ部材１１０とは逆方向に軸動することにより、上記対向面間隔を増大させる。   In the drive pulley 100 configured as described above, the movable pulley member 120 receives a thrust force toward the fixed pulley member 110 and axially moves toward the fixed pulley member 110, whereby the fixed pulley member 110 and the movable pulley member 120 are moved. The interval between the opposing surfaces (hereinafter also referred to as the opposing surface interval) is reduced. Further, the movable pulley member 120 is axially moved in the direction opposite to that of the fixed pulley member 110 as the thrust is attenuated, thereby increasing the interval between the opposed surfaces.

上述した従動プーリは、駆動プーリ１００と同様の構成及び機能を有しており、当該従動プーリの固定プーリ部材は、その従動軸にて、駆動プーリ１００の駆動軸１３０に平行に位置する。なお、駆動プーリ１００の固定プーリ部材１１０及び可動プーリ部材１２０の円錐状対向面の半径は、１４７（ｍｍ）であり、上記従動プーリの固定プーリ部材及び可動プーリ部材の円錐状対向面の半径は、１４３（ｍｍ）である。また、シーブ角は、駆動プーリ１００及び従動プーリに共通で、１３°である。   The driven pulley described above has the same configuration and function as the drive pulley 100, and the fixed pulley member of the driven pulley is positioned parallel to the drive shaft 130 of the drive pulley 100 at the driven shaft. The radius of the conical opposing surfaces of the fixed pulley member 110 and the movable pulley member 120 of the driving pulley 100 is 147 (mm), and the radius of the conical opposing surfaces of the fixed pulley member and the movable pulley member of the driven pulley is as follows. , 143 (mm). Further, the sheave angle is 13 ° common to the drive pulley 100 and the driven pulley.

図１から分かるように、Ｖベルト２００は、駆動プーリ１００及び上記従動プーリに亘り巻装されているもので、当該Ｖベルト２００は、一対の無端状張力帯２１０と、これら一対の張力帯２１０に対しその長手方向に係止してなる複数のブロック２２０とを備えている（図１〜図５参照）。   As can be seen from FIG. 1, the V-belt 200 is wound around the drive pulley 100 and the driven pulley, and the V-belt 200 includes a pair of endless tension bands 210 and the pair of tension bands 210. Are provided with a plurality of blocks 220 that are locked in the longitudinal direction (see FIGS. 1 to 5).

図２及び図３にて示すごとく、一対の張力帯２１０は、それぞれ、複数の並列状のアラミド樹脂製芯線２１１を、硬質ゴム材料からなる被覆部材２１２でもって、図示断面を有するように被覆して無端状に形成されている。   As shown in FIGS. 2 and 3, each of the pair of tension bands 210 covers a plurality of parallel aramid resin core wires 211 with a covering member 212 made of a hard rubber material so as to have the illustrated cross section. And endless.

図２及び図３にて示すように、複数のブロック２２０は、それぞれ、逆エの字型板形状に構成されている。これに伴い、これら各ブロック２２０は、逆エの字型板形状のブロック本体２２０ａと、被覆部材２２０ｂとを備えている。   As shown in FIG. 2 and FIG. 3, the plurality of blocks 220 are each configured in an inverted square plate shape. Accordingly, each of these blocks 220 includes a reverse-shaped plate-shaped block main body 220a and a covering member 220b.

ブロック本体２２０ａは、アルミニウム合金を用いて、上下両側ビーム２２１、２２２をピラー２２３でもって逆エの字型板形状となるように連結形成して構成されている。但し、上側ビーム２２１の両端面は、下側ビーム２２２の両端面とともに、固定プーリ部材１１０及び可動プーリ部材１２０の両対向面に沿い傾斜してＶ字状をなすように形成されている。   The block main body 220a is formed by connecting and forming upper and lower side beams 221 and 222 with pillars 223 so as to form an inverted square plate shape using an aluminum alloy. However, both end surfaces of the upper beam 221 are formed so as to be inclined along the opposing surfaces of the fixed pulley member 110 and the movable pulley member 120 together with both end surfaces of the lower beam 222 so as to form a V shape.

被覆部材２２０ｂは、硬質樹脂材料でもって、ブロック本体２２０ａの外表面を層状に被覆して形成されており、当該被覆部材２２０ｂのうちブロック本体２２０ａの上側ビーム２２１の両端面の被覆部位及び下側ビーム２２２の両端面の被覆部位が、両摩擦接触面２２４（本発明の両動力伝動面に相当）を形成している。なお、被覆部材２２０ｂは、上側ビーム２２１の上面中央の両側部と、下側ビーム２２２の下面中央の両側部とが外方に露呈するように形成されている（図２〜図５参照）。   The covering member 220b is made of a hard resin material and is formed by covering the outer surface of the block main body 220a in a layered manner. Of the covering member 220b, the covering portion and the lower side of both end surfaces of the upper beam 221 of the block main body 220a are formed. Covered portions on both end surfaces of the beam 222 form both frictional contact surfaces 224 (corresponding to both power transmission surfaces of the present invention). Note that the covering member 220b is formed such that both sides of the upper surface center of the upper beam 221 and both sides of the lower surface center of the lower beam 222 are exposed to the outside (see FIGS. 2 to 5).

このように構成した各ブロック２２０は、図１〜図３にて示すごとく、ブロック本体２２０ａの上下両側ビーム２２１、２２２の間にその両側から一対の張力帯２１０を挿入することで、当該一対の張力帯２１０に係止されている。ここで、各ブロック２２０は、前側面部位２２４ａ（後述する）を後側面部位２２４ｂ（後述する）よりもベルト進行方向側に位置させるように一対の張力帯２１０に係止されている。また、一対の張力帯２１０は、その上下両面にて、被覆部材２２０ｂのうち上下両側ビーム２２１、２２２の両対向面に沿う各被覆部位と当接している（図３及び図４参照）。   As shown in FIGS. 1 to 3, each block 220 configured in this way is inserted into a pair of tension bands 210 between the upper and lower side beams 221 and 222 of the block main body 220 a, so that Locked to the tension band 210. Here, each block 220 is locked to the pair of tension bands 210 so that the front side surface portion 224a (described later) is positioned on the belt traveling direction side of the rear side surface portion 224b (described later). Further, the pair of tension bands 210 are in contact with the respective covering portions along the opposing surfaces of the upper and lower side beams 221 and 222 on the upper and lower surfaces of the covering member 220b (see FIGS. 3 and 4).

次に、本発明の要部の構成につき詳細に説明する。本第１実施形態においては、各ブロック２２０の両摩擦接触面２２４は、図３及び図５にて示すごとく、それぞれ、以下のような形状となるように互いに対称的に形成されている。   Next, the configuration of the main part of the present invention will be described in detail. In the first embodiment, as shown in FIGS. 3 and 5, the two friction contact surfaces 224 of each block 220 are formed symmetrically with each other so as to have the following shapes.

被覆部材２２０ｂの両摩擦接触面２２４のうち、図６にて示す一側摩擦接触面２２４を例にとれば、当該一側摩擦接触面２２４は、その前側面部位２２４ａの前端部ａにて、ブロック２２０の板厚方向中心Ｐからブロック本体２２０ａの幅方向内側へ所定距離αだけずれて位置するように位置決め形成されている。   Of the two frictional contact surfaces 224 of the covering member 220b, if the one-side frictional contact surface 224 shown in FIG. 6 is taken as an example, the one-side frictional contact surface 224 is at the front end portion a of the front side surface portion 224a. The block 220 is positioned and formed so as to be shifted from the center P in the plate thickness direction by a predetermined distance α inward in the width direction of the block main body 220a.

また、当該一側摩擦接触面２２４は、その後側面部位２２４ｂの後端部ｂにて、ブロック２２０の板厚方向中心Ｐからブロック本体２２０ａの幅方向外側へ所定距離βだけずれて位置するように位置決め形成されている。但し、本実施形態において、ブロック２２０の板厚ｔを３（ｍｍ）としたとき、所定距離α及び所定距離βは、それぞれ、４（μｍ）及び１６（μｍ）である。なお、当該一側摩擦接触面２２４において、前側面部位２２４ａと後側面部位２２４ｂとは、板厚方向中心Ｐを境界とする。   Further, the one side frictional contact surface 224 is located at the rear end b of the rear side surface portion 224b so as to be shifted from the center P in the thickness direction of the block 220 to the outside in the width direction of the block main body 220a by a predetermined distance β. Positioning is formed. However, in this embodiment, when the plate thickness t of the block 220 is 3 (mm), the predetermined distance α and the predetermined distance β are 4 (μm) and 16 (μm), respectively. In the one-side frictional contact surface 224, the front side surface portion 224a and the rear side surface portion 224b have a plate thickness direction center P as a boundary.

このような前提のもとに、当該一側摩擦接触面２２４は、その前側面部位２２４ａの前端部ａから後側面部位２２４ｂの後端部ｂにかけて、外方からブロック本体２２０ａの幅方向内側に向けて凹な緩やかな湾曲形状（例えば、円弧形状）となるように、大きな曲率半径でもって形成されている。   Under such a premise, the one-side frictional contact surface 224 extends from the outside toward the inner side in the width direction of the block main body 220a from the front end portion a of the front side surface portion 224a to the rear end portion b of the rear side surface portion 224b. It is formed with a large radius of curvature so as to have a gently curved shape (for example, an arc shape) that is concave toward the surface.

従って、当該一側摩擦接触面２２４の曲面の中心は、図６にて板厚方向中心Ｐよりも図示斜め右上側に位置する。このため、当該一側摩擦接触面２２４は、その前側面部位２２４ａから後側面部位２２４ｂにかけて、ブロック本体２２０ａの幅方向外側へ緩やかに遠ざかるように位置する。   Therefore, the center of the curved surface of the one-side frictional contact surface 224 is located on the diagonal upper right side in the drawing with respect to the center P in the thickness direction in FIG. Therefore, the one-side frictional contact surface 224 is positioned so as to gradually move away from the front side surface portion 224a to the rear side surface portion 224b toward the outside in the width direction of the block main body 220a.

また、当該一側摩擦接触面２２４は、その前側面部位２２４ａの前端部ａ及び後側面部位２２４ｂの後端部ｂにて、それぞれ、外側に向けて凸な湾曲形状（例えば、円弧形状）となるように小さな曲率半径でもって形成されている。   Further, the one-side frictional contact surface 224 has a curved shape (for example, an arc shape) convex outward at the front end portion a of the front side surface portion 224a and the rear end portion b of the rear side surface portion 224b, respectively. It is formed with a small radius of curvature.

本実施形態において、上述のようにブロック２２０の両摩擦接触面２２４の形状を構成したのは以下の理由に基づく。従来のブロックが駆動プーリから解離するときに当該従来のブロックの両摩擦接触面に作用する面圧をシミュレーションによる数値解析を行ってみたところ、当該面圧は、従来のブロックの両摩擦接触面の各前側面部位では、少なくともその前端部にて、４（μｍ）に対応する値だけ増大することが分かった。一方、当該従来のブロックの両摩擦接触面の各後側面部位には、少なくともその後端部にて、１６（μｍ）の隙間が、固定プーリ部材及び可動プーリ部材の各対向面との間に形成されることが分かった。このようなことから、従来のブロックの両摩擦接触面ではその各前側面部位の面圧が集中的に増大していることが分かる。なお、上記数値解析における駆動条件には、伝動装置の作動頻度が高いプーリ比０．５付近が採用されている。   In the present embodiment, the shape of the two friction contact surfaces 224 of the block 220 is configured as described above based on the following reason. When the surface pressure acting on both frictional contact surfaces of the conventional block when the conventional block dissociates from the driving pulley is analyzed by simulation, the surface pressure is determined by the frictional contact surfaces of the conventional block. It was found that each front side region increased by a value corresponding to 4 (μm) at least at its front end. On the other hand, a gap of 16 (μm) is formed between the opposing surfaces of the fixed pulley member and the movable pulley member at least at the rear end of each rear side surface portion of both frictional contact surfaces of the conventional block. I found out that From this, it can be seen that the surface pressure of each front side portion of the conventional frictional contact surface of the conventional block is intensively increased. Note that, as a driving condition in the numerical analysis, a pulley ratio of around 0.5 where the operating frequency of the transmission is high is employed.

そこで、本実施形態では、上述のような各前側面部位の面圧の集中を解消するため、ブロック２２０の両摩擦接触面２２４の形状が上述のように構成されている。   Therefore, in the present embodiment, the shape of both frictional contact surfaces 224 of the block 220 is configured as described above in order to eliminate the concentration of surface pressure at each front side surface portion as described above.

以上のように構成した本第１実施形態において、駆動プーリ１００が、その駆動軸１３０を介し動力を受けて回転すると、この動力はＶベルト２００の駆動プーリ１００との摩擦接触により上記従動プーリに伝動される。   In the first embodiment configured as described above, when the drive pulley 100 is rotated by receiving power through the drive shaft 130, this power is applied to the driven pulley by frictional contact with the drive pulley 100 of the V-belt 200. Be transmitted.

このような状態においては、固定プーリ部材１１０及び可動プーリ部材１２０の間に順次進入して噛み込まれるブロック２２０毎に、当該ブロック２２０は、両摩擦接触面２２４にて、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面と摩擦接触しながら、上記駆動プーリ１００と共に回転し、然る後、当該駆動プーリ１００から解離して上記従動プーリに向けて移動する。   In such a state, for each block 220 that sequentially enters and bites between the fixed pulley member 110 and the movable pulley member 120, the block 220 is connected to the fixed pulley member 110 and the movable pulley at both frictional contact surfaces 224. The roller member 120 rotates with the driving pulley 100 while making frictional contact with both conical opposing surfaces of the pulley member 120, and then dissociates from the driving pulley 100 and moves toward the driven pulley.

ここで、可動プーリ部材１２０に作用する推力がブロック２２０をその幅方向に変形させる程の大きさであって固定プーリ部材１１０及び可動プーリ部材１２０の間の上記対向面間隔が、例えば、狭くなる過程或いは一定の場合においては、上述のようにブロック２２０が噛み込まれるとき、図７に示すように、当該ブロック２２０は、本明細書の発明の解決課題の欄にて述べた上記基準噛み込み位置よりも後側（ベルト進行方向手前側）、即ち、符号２２０ｇで示すブロックの位置に位置する。   Here, the thrust acting on the movable pulley member 120 is large enough to cause the block 220 to deform in the width direction, and the above-described spacing between the fixed pulley member 110 and the movable pulley member 120 becomes narrow, for example. In the process or in a fixed case, when the block 220 is bitten as described above, as shown in FIG. 7, the block 220 is the above-mentioned reference bite described in the “Solution problem” section of the present invention. It is located behind the position (front side in the belt traveling direction), that is, at the position of the block indicated by reference numeral 220g.

このとき、固定プーリ部材１１０及び可動プーリ部材１２０の両対向面が上述のごとく円錐状であることから、図７に示すように、当該ブロック２２０は、符号２２０ｈで示すブロックのように当該両対向面上の半径線に対し前傾した姿勢となり、その後、上記基準噛み込み位置に達したときにも、そのまま、前傾姿勢を維持する。   At this time, since both opposing surfaces of the fixed pulley member 110 and the movable pulley member 120 are conical as described above, as shown in FIG. 7, the block 220 is opposite to the both sides like a block denoted by reference numeral 220h. The posture is inclined forward with respect to the radial line on the surface, and the forward inclined posture is maintained as it is even when the reference biting position is reached.

これに対し、ブロック２２０の両摩擦接触面２２４は、上述のごとく、前側面部位２２４ａの前端部ａにて、所定距離α（＝４（μｍ））だけ、ブロック本体２２０ａの幅方向内側に位置し、後側面部位２２４ｂの後端部ｂにて、所定距離β（＝１６（μｍ））だけ、ブロック本体２２０ａの幅方向外側に位置するように、外方からブロック２２０の幅方向内側に向けて凹な緩やかな湾曲形状でもって形成されている。このことは、ブロック２２０の両摩擦接触面２２４は、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面に対し均一に接触可能な形状を有することを意味する。   On the other hand, the two friction contact surfaces 224 of the block 220 are positioned at the inner side in the width direction of the block main body 220a by the predetermined distance α (= 4 (μm)) at the front end portion a of the front side surface portion 224a as described above. Then, at the rear end portion b of the rear side surface portion 224b, from the outside toward the inner side in the width direction of the block 220 so as to be located on the outer side in the width direction of the block body 220a by a predetermined distance β (= 16 (μm)). It is formed with a concave and gently curved shape. This means that both frictional contact surfaces 224 of the block 220 have a shape that can uniformly contact both conical opposing surfaces of the fixed pulley member 110 and the movable pulley member 120.

従って、上述のように推力がブロック２２０をその幅方向に変形させる程の大きさであって固定プーリ部材１１０及び可動プーリ部材１２０の間の上記対向面間隔が、例えば、狭くなる過程或いは一定の場合において、当該ブロック２２０は、上述のような前傾姿勢にあっても、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面と接触不均一となることなく、両摩擦接触面２２４にて、それぞれ、前側面部位２２４ａだけでなく後側面部位２２４ｂをも含め全面に亘り、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面と均一に摩擦接触し得る。   Therefore, as described above, the thrust is large enough to deform the block 220 in the width direction, and the distance between the opposed surfaces between the fixed pulley member 110 and the movable pulley member 120 is, for example, a process of narrowing or constant. In this case, even if the block 220 is in the forward inclined posture as described above, the frictional contact surfaces 224 are not unevenly contacted with the conical opposing surfaces of the fixed pulley member 110 and the movable pulley member 120. Thus, the entire surface including not only the front side surface portion 224a but also the rear side surface portion 224b can be brought into uniform frictional contact with both conical opposing surfaces of the fixed pulley member 110 and the movable pulley member 120.

これにより、可動プーリ部材１２０に作用する推力がブロック２２０をその幅方向に変形させる程に大きいときに、固定プーリ部材１１０及び可動プーリ部材１２０の間隔を、例えば、狭くし或いは一定に維持するような頻度が高くても、両摩擦接触面２２４に生ずる各面圧が局所的に増大することがなく、その結果、Ｖベルト２００の伝動能力を良好に維持し得る。   Accordingly, when the thrust acting on the movable pulley member 120 is large enough to deform the block 220 in the width direction, the interval between the fixed pulley member 110 and the movable pulley member 120 is, for example, narrowed or maintained constant. Even if the frequency is high, each surface pressure generated on both frictional contact surfaces 224 does not increase locally, and as a result, the transmission capability of the V-belt 200 can be maintained well.

ここで、ブロック２２０の両摩擦接触面２２４は、前側面部位２２４ａの前端部ａにて、上述したごとく、外側に向けて凸な湾曲形状となるように、小さな曲率半径でもって形成されている。従って、ブロック２２０が固定プーリ部材１１０及び可動プーリ部材１２０に噛み込まれる際、ブロック２２０は、両摩擦接触面２２４により、前側面部位２２４ａの前端部ａにて、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面との間で応力集中を緩和しつつ円滑に接触する。その結果、Ｖベルト２００の伝動能力を良好に維持し得る。   Here, both frictional contact surfaces 224 of the block 220 are formed with a small radius of curvature so as to have a curved shape convex outward as described above at the front end portion a of the front side surface portion 224a. . Therefore, when the block 220 is engaged with the fixed pulley member 110 and the movable pulley member 120, the block 220 is fixed to the fixed pulley member 110 and the movable pulley member at the front end portion a of the front side surface portion 224 a by the two friction contact surfaces 224. Smooth contact is achieved while relaxing stress concentration between the two conical opposing surfaces of 120. As a result, the transmission capability of the V-belt 200 can be maintained well.

また、ブロック２２０の両摩擦接触面２２４は、後側面部位２２４ｂの後端部ｂにて、上述したごとく、外側に向けて凸な湾曲形状となるように小さな曲率半径でもって形成されている。従って、ブロック２２０が固定プーリ部材１１０と可動プーリ部材１２０から解離する際、両摩擦接触面２２４は、後側面部位２２４ｂの後端部ｂにて、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面との間で応力集中を緩和しつつ円滑に接触しながら当該両円錐状対向面から解離する。その結果、Ｖベルト２００の伝動能力を良好に維持し得る。   Further, both frictional contact surfaces 224 of the block 220 are formed with a small radius of curvature so as to be curved outward toward the outer side at the rear end portion b of the rear side surface portion 224b as described above. Accordingly, when the block 220 is disengaged from the fixed pulley member 110 and the movable pulley member 120, the two friction contact surfaces 224 are formed at both rear cones b of the fixed pulley member 110 and the movable pulley member 120 at the rear end portion b of the rear side surface portion 224b. And dissociate from both conical opposing surfaces while making smooth contact while relaxing the stress concentration between the opposing surfaces. As a result, the transmission capability of the V-belt 200 can be maintained well.

また、本第１実施形態では、上述したごとく、ブロック２２０の各摩擦接触面２２４は、板厚方向中心Ｐを基準として、前側面部位２２４ａの前端部ａにて、所定距離αだけ、ブロック本体２２０ａの幅方向内側に位置し、後側面部位２２４ｂの後端部ｂにて、所定距離βだけ、ブロック本体２２０ａの幅方向外側に位置するように形成されているが、これに限ることなく、各摩擦接触面２２４の前端部ａと後端部ｂとの間の距離が、板厚方向中心Ｐとはかかわりなく、上記各所定距離の和（α＋β）となっていれば、本第１実施形態にて述べたと同様の作用効果が達成され得る。
（第２実施形態）
図８〜図１０は、本発明の第２実施形態の要部を示している。この第２実施形態では、上記第１実施形態にて述べたブロック２２０において、ブロック本体２２０ａを被覆する被覆部材２２０ｂは、両摩擦接触面２２４に代えて、図８にて示すごとく、両摩擦接触面２２５（本発明の両動力伝動面に相当）を備えている。 Further, in the first embodiment, as described above, each friction contact surface 224 of the block 220 has the block main body by a predetermined distance α at the front end portion a of the front side surface portion 224a with reference to the center P in the thickness direction. 220a is located on the inner side in the width direction, and is formed so as to be located on the outer side in the width direction of the block main body 220a by a predetermined distance β at the rear end b of the rear side surface portion 224b. If the distance between the front end portion a and the rear end portion b of each friction contact surface 224 is the sum (α + β) of the predetermined distances irrespective of the plate thickness direction center P, the first embodiment The same effects as described in the embodiment can be achieved.
(Second Embodiment)
8-10 has shown the principal part of 2nd Embodiment of this invention. In the second embodiment, in the block 220 described in the first embodiment, the covering member 220b covering the block main body 220a is replaced with both frictional contact surfaces 224 as shown in FIG. A surface 225 (corresponding to both power transmission surfaces of the present invention) is provided.

ここで、当該両摩擦接触面２２５は、それぞれ、その前側面部位２２５ａの前端部ｃから後側面部位２２５ｂの後端部ｄにかけて、ブロック本体２２０ａの幅方向外側に向けて階段状に遠ざかるような段差形状にて、互いに対称的に形成されている。   Here, both the friction contact surfaces 225 are stepped away from the front end portion c of the front side surface portion 225a to the rear end portion d of the rear side surface portion 225b toward the outside in the width direction of the block main body 220a. The steps are symmetrical with each other.

但し、当該両摩擦接触面２２５が、それぞれ、その段差形状でもって、前側面部位２２５ａと後側面部位２２５ｂとの境界に形成する段差２２５ｃは、ブロック２２０の板厚方向中心Ｐに位置し、かつ、所定距離γ（図９参照）で与えられる。また、当該所定距離γは、上記第１実施形態にて述べた両所定距離α、βの和である２０（μｍ）に相当する。   However, both the friction contact surfaces 225 have the step shape, and the step 225c formed at the boundary between the front side surface portion 225a and the rear side surface portion 225b is located at the center P in the plate thickness direction of the block 220, and , Given by a predetermined distance γ (see FIG. 9). The predetermined distance γ corresponds to 20 (μm), which is the sum of both the predetermined distances α and β described in the first embodiment.

また、当該両摩擦接触面２２５は、その前側面部位２２５ａの前端部ｃ及び後側面部位２２５ｂの後端部ｄにて、上記第１実施形態にて述べた両摩擦接触面２２４の前側面部位２２４ａの前端部ａ及び後側面部位２２４ｂの後端部ｂと同様に、外側に向けて凸な湾曲形状（例えば、円弧形状）となるように、小さな曲率半径でもって形成されている。その他の構成は、上記第１実施形態と同様である。   Further, the two friction contact surfaces 225 are formed at the front end portion c of the front side surface portion 225a and the rear end portion d of the rear side surface portion 225b, and the front side surface portions of the two friction contact surfaces 224 described in the first embodiment. Similarly to the front end portion a of the 224a and the rear end portion b of the rear side surface portion 224b, it is formed with a small radius of curvature so as to have a curved shape convex toward the outside (for example, an arc shape). Other configurations are the same as those in the first embodiment.

このように構成した本第２実施形態において、上述のように構成したブロック２２０は、インサート成形により次のようにして製造される。   In the second embodiment configured as described above, the block 220 configured as described above is manufactured by insert molding as follows.

この製造にあたり採用される金型３００は、図１０にて示すごとく、上型３１０及び下型３２０でもって構成されており、これら上型３１０及び下型３２０は、本第２実施形態のブロック２２０の外形形状を考慮して、共に、逆エの字形状に開口する開口部３１１、３２１をそれぞれ有している。   As shown in FIG. 10, the mold 300 employed in the manufacture is configured with an upper mold 310 and a lower mold 320, and the upper mold 310 and the lower mold 320 are blocks 220 according to the second embodiment. Both have openings 311 and 321 that open in an inverted U shape.

しかして、上型３１０は、その逆エの字形状開口部３１１にて、図１０にて示すごとく、下型３２０の逆エの字形状開口部３２１に係合されることで、当該下型３２０に組み付けられる。これにより、上型３１０と下型３２０との間に、本実施形態のブロック２２０を製造するための内部空所が形成される。   Thus, the upper mold 310 is engaged with the reverse-shaped opening 321 of the lower mold 320 at its inverted-shaped opening 311 as shown in FIG. 320 is assembled. Thereby, an internal space for manufacturing the block 220 of the present embodiment is formed between the upper mold 310 and the lower mold 320.

ここで、上型３１０の内壁は、本第２実施形態のブロック２２０の前側部位の外形形状と合致するように形成されており、一方、下型３２０の内壁は、本実施形態のブロック２２０の後側部位の外形形状と合致するように形成されている。   Here, the inner wall of the upper mold 310 is formed to match the outer shape of the front part of the block 220 of the second embodiment, while the inner wall of the lower mold 320 is the block 220 of the present embodiment. It is formed to match the outer shape of the rear part.

但し、図１０において、上型３１０の内壁のうち図示左右両側内壁部は、被覆部材２２０ｂの両摩擦接触面２２５の各前側面部位２２５ａに対応し、一方、下型３２０の内壁のうち図示左右両側内壁部は、被覆部材２２０ｂの両摩擦接触面２２５の各後側面部位２２５ｂに対応する。また、図１０において、上型３１０の内壁のうち図示上側内壁部は、当該ブロック２２０の前面に対応し、下型３２０の内壁のうち図示下側内壁部は、当該ブロック２２０の後面に対応する。   However, in FIG. 10, the left and right inner walls shown in the inner wall of the upper mold 310 correspond to the front side portions 225a of the two friction contact surfaces 225 of the covering member 220b, while The both side inner wall portions correspond to the respective rear side surface portions 225b of the two friction contact surfaces 225 of the covering member 220b. In FIG. 10, the illustrated upper inner wall portion of the inner wall of the upper mold 310 corresponds to the front surface of the block 220, and the illustrated lower inner wall portion of the inner wall of the lower mold 320 corresponds to the rear surface of the block 220. .

また、本第２実施形態では、上型３１０は、その開口部３１１にて、下型３２０の開口部３２１に対し、ブロック２２０の板厚方向中心Ｐに対応する位置にて係合するように形成されている。従って、両開口部３１１、３２１の各係合面は、被覆部材２２０ｂの両摩擦接触面２２５の段差２２５ｃと同一面内に位置する。   In the second embodiment, the upper mold 310 is engaged with the opening 321 of the lower mold 320 at the opening 311 at a position corresponding to the center P in the plate thickness direction of the block 220. Is formed. Therefore, the engagement surfaces of both openings 311 and 321 are located in the same plane as the step 225c of both friction contact surfaces 225 of the covering member 220b.

また、上型３１０の内壁は、図１０にて示すごとく、その左側内壁部にて、下型３２０の内壁の左側内壁部よりも、上記所定距離γ（＝２０（μｍ））だけ図示右側に位置しており、上型３１０の内壁は、その右側内壁部にて、下型３２０の内壁の右側内壁部よりも、上記所定距離γ（＝２０（μｍ））だけ図示左側に位置している。   Further, as shown in FIG. 10, the inner wall of the upper mold 310 is on the right side in the drawing by the predetermined distance γ (= 20 (μm)) at the left inner wall portion thereof than the left inner wall portion of the inner wall of the lower mold 320. The inner wall of the upper mold 310 is located on the left side in the figure by the predetermined distance γ (= 20 (μm)) from the right inner wall of the lower mold 320 at the right inner wall. .

しかして、予め準備したブロック本体２２０ａを、上述のように構成した金型３００の内部空所内にインサートし、然る後、被覆部材２２０ｂの形成材料を液状にてブロック本体２２０ａの周りに注入して凝固させる。これにより、被覆部材２２０ｂが、上述のごとく、ブロック本体２２０ａを被覆するように成形される。このようにして、ブロック２２０が、本第２実施形態における上記構成を有するように、インサート成形でもって製造される。   Then, the block main body 220a prepared in advance is inserted into the internal space of the mold 300 configured as described above, and thereafter, the forming material of the covering member 220b is injected around the block main body 220a in liquid form. To solidify. Thereby, the covering member 220b is molded so as to cover the block main body 220a as described above. Thus, the block 220 is manufactured by insert molding so as to have the above-described configuration in the second embodiment.

以上のような製造方法によれば、ブロック２２０の両摩擦接触面２２５は、上述のごとく、上記第１実施形態にて述べた両摩擦接触面２２４とは異なり、段差形状という簡単な形状を有するから、金型３００の構成も簡単であって、当該ブロック２２０の加工工数が低減してその製造が非常に容易である。   According to the manufacturing method as described above, both the friction contact surfaces 225 of the block 220 have a simple shape called a step shape unlike the both friction contact surfaces 224 described in the first embodiment as described above. Therefore, the configuration of the mold 300 is also simple, and the number of processing steps for the block 220 is reduced, and its manufacture is very easy.

以上のように構成した本第２実施形態において、可動プーリ部材１２０に作用する推力がブロック２２０を幅方向に変形させる程に大きいときに固定プーリ部材１１０と可動プーリ部材１２０との間隔が、例えば、狭くなる過程或いは一定に維持される過程では、本第２実施形態のブロック２２０は、上記第１実施形態と同様の前傾姿勢のもと、上記第１実施形態にて述べた両摩擦接触面２２４と同様に、前側面部位２２５ａ及び後側面部位２２５ｂの全面に亘り、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面にほぼ均一に摩擦接触し得る。その結果、本第２実施形態によっても、上記第１実施形態と実質的に同様の作用効果が達成され得る。   In the second embodiment configured as described above, when the thrust acting on the movable pulley member 120 is large enough to deform the block 220 in the width direction, the distance between the fixed pulley member 110 and the movable pulley member 120 is, for example, In the process of narrowing or being maintained constant, the block 220 of the second embodiment has both the frictional contact described in the first embodiment under the forward leaning posture similar to that of the first embodiment. Similar to the surface 224, the entire surface of the front side surface portion 225 a and the rear side surface portion 225 b can be brought into friction contact with the conical opposing surfaces of the fixed pulley member 110 and the movable pulley member 120 almost uniformly. As a result, also according to the second embodiment, substantially the same operational effects as those of the first embodiment can be achieved.

なお、本第２実施形態では、上述したごとく、ブロック２２０の各摩擦接触面２２５の段差２２５ｃは、板厚方向中心Ｐに位置し、かつ、所定距離γで与えられるが、当該段差２２５ｃは、板厚方向中心Ｐからずれて位置していてもよく、また、段差２２５ｃが上記所定距離γで与えられていることに限らず、各摩擦接触面２２５の前側面部位２２５ａの前端部ｃと後側面部位２２５ｂの後端部ｄとの間の距離が、上記所定距離γであればよい。
（第３実施形態）
図１１は、本発明の第３実施形態の要部を示している。この第３実施形態では、上記第１実施形態にて述べたブロック２２０において、ブロック本体２２０ａを被覆する被覆部材２２０ｂは、両摩擦接触面２２４に代えて、図１１にて示すごとく、両摩擦接触面２２６（本発明の両動力伝動面に相当）を備えている。なお、図１１では、一方の摩擦接触面２２６のみが示されている。 In the second embodiment, as described above, the step 225c of each frictional contact surface 225 of the block 220 is located at the center P in the plate thickness direction and given by a predetermined distance γ, but the step 225c is The step 225c may be positioned away from the center P in the thickness direction, and the front end c and the rear of the front side portion 225a of each frictional contact surface 225 are not limited to the given distance γ. The distance from the rear end portion d of the side surface portion 225b may be the predetermined distance γ.
(Third embodiment)
FIG. 11 shows the main part of the third embodiment of the present invention. In the third embodiment, in the block 220 described in the first embodiment, the covering member 220b covering the block main body 220a is replaced with both frictional contact surfaces 224 as shown in FIG. A surface 226 (corresponding to both power transmission surfaces of the present invention) is provided. In FIG. 11, only one friction contact surface 226 is shown.

ここで、当該両摩擦接触面２２６は、図１１にて例示するごとく、それぞれ、その前側面部位２２６ａの前端部ｅから後側面部位２２６ｂの後端部ｆにかけて、ブロック本体２２０ａの幅方向外側に向けて遠ざかるようなテーパ形状にて、互いに対称的に形成されている。   Here, as illustrated in FIG. 11, the friction contact surfaces 226 are respectively formed on the outer side in the width direction of the block main body 220a from the front end portion e of the front side surface portion 226a to the rear end portion f of the rear side surface portion 226b. They are formed symmetrically with each other in a taper shape that moves away from each other.

但し、当該両摩擦接触面２２６において、後側面部位２２６ｂは、その後端部ｆにて、前側面部位２２６ａの前端部ｅよりも、ブロック本体２２０ａの幅方向外側へ、所定距離δだけ遠ざかるように形成されている。また、当該所定距離δは、上記第１実施形態にて述べた両所定距離α、βの和である２０（μｍ）に相当する。   However, in both the frictional contact surfaces 226, the rear side surface portion 226b is at a rear end portion f so as to be away from the front end portion e of the front side surface portion 226a by a predetermined distance δ to the outside in the width direction of the block body 220a. Is formed. The predetermined distance δ corresponds to 20 (μm) which is the sum of both the predetermined distances α and β described in the first embodiment.

また、当該両摩擦接触面２２６は、その前側面部位２２６ａの前端部ｅ及び後側面部位２２６ｂの後端部ｆにて、上記第１実施形態にて述べた両摩擦接触面２２４の前側面部位２２４ａの前端部ａ及び後側面部位２２４ｂの後端部ｂと同様に、外側に向けて凸な湾曲形状（例えば、円弧形状）となるように、小さな曲率半径でもって形成されている。その他の構成は、上記第１実施形態と同様である。   Further, the two friction contact surfaces 226 are formed at the front end portion e of the front side surface portion 226a and the rear end portion f of the rear side surface portion 226b, and the front side surface portions of the two friction contact surfaces 224 described in the first embodiment. Similarly to the front end portion a of the 224a and the rear end portion b of the rear side surface portion 224b, it is formed with a small radius of curvature so as to have a curved shape convex toward the outside (for example, an arc shape). Other configurations are the same as those in the first embodiment.

以上のように構成した本第３実施形態において、可動プーリ部材１２０に作用する推力がブロックを幅方向に変形させる程に大きいときに固定プーリ部材１１０と可動プーリ部材１２０との間隔が、例えば、狭くなる過程或いは一定に維持される過程では、本第３実施形態のブロック２２０は、上記第１実施形態と同様の前傾姿勢のもと、前側面部位２２６ａ及び後側面部位２２６ｂの全面にて、固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面に摩擦接触する。その結果、本第３実施形態によっても、上記第１実施形態と実質的に同様の作用効果が達成され得る。   In the third embodiment configured as described above, when the thrust acting on the movable pulley member 120 is large enough to deform the block in the width direction, the distance between the fixed pulley member 110 and the movable pulley member 120 is, for example, In the process of being narrowed or kept constant, the block 220 of the third embodiment is applied to the entire front side surface part 226a and the rear side surface part 226b under the forward tilting posture similar to the first embodiment. Then, both the conical opposing surfaces of the fixed pulley member 110 and the movable pulley member 120 are in frictional contact. As a result, according to the third embodiment, substantially the same function and effect as those of the first embodiment can be achieved.

また、本第３実施形態のブロック２２０では、上述のごとく、被覆部材２２０ｂの両摩擦接触面２２６がテーパ形状という単純な傾斜形状であることから、上記第１或いは第２の実施形態にて述べた被覆部材２２０ｂの両摩擦接触面２２４、２２５の湾曲形状或いは段差形状に比べて、当該ブロック２２０の製造がより一層容易になる。   Further, in the block 220 of the third embodiment, as described above, since both the friction contact surfaces 226 of the covering member 220b have a simple inclined shape such as a taper shape, they are described in the first or second embodiment. Compared to the curved shape or the step shape of the two friction contact surfaces 224 and 225 of the covering member 220b, the block 220 can be manufactured more easily.

なお、本発明の実施にあたり、上記各実施形態に限ることなく、次のような種々の変形例が挙げられる。
（１）ブロック２２０の両摩擦接触面である被覆部材２２０ｂの両摩擦接触面は、上記第１、第２或いは第３の実施形態にて述べた形状に限ることなく、その前側面部位の前端部から後側面部位の後端部にかけて固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面とほぼ均一な面圧でもって摩擦接触可能な形状であれば、どのような形状にて形成されていてもよい。
（２）上記第２実施形態にて述べた金型３００における上型３１０の開口部３１１と下型３２０の開口部３２１との間の係合面は、ブロック２２０の板厚方向中心Ｐに限ることなく、当該板厚方向中心Ｐよりもブロック２２０の板厚方向の前側或いは後側に位置するように形成してもよい。
（３）上記第１、第２或いは第３の実施形態にて述べたブロック２２０の両両摩擦接触面の形状は、駆動プーリ或いは従動プーリの固定プーリ部材１１０及び可動プーリ部材１２０の両円錐状対向面との当該両摩擦接触面の摩擦接触を均一にするに必要な駆動条件に基づき決定するようにしてもよい。 In carrying out the present invention, the following various modifications are possible without being limited to the above embodiments.
(1) The two frictional contact surfaces of the covering member 220b, which are the two frictional contact surfaces of the block 220, are not limited to the shapes described in the first, second, or third embodiment, and the front end of the front side surface portion thereof. Any shape can be used as long as it can be brought into frictional contact with the conical opposed surfaces of the fixed pulley member 110 and the movable pulley member 120 with substantially uniform surface pressure from the rear portion to the rear end portion of the rear side surface portion. It may be.
(2) The engagement surface between the opening 311 of the upper mold 310 and the opening 321 of the lower mold 320 in the mold 300 described in the second embodiment is limited to the center P in the plate thickness direction of the block 220. Instead, it may be formed so as to be located on the front side or the rear side in the plate thickness direction of the block 220 with respect to the plate thickness direction center P.
(3) Both the frictional contact surfaces of the block 220 described in the first, second or third embodiment are shaped like both cones of the fixed pulley member 110 and the movable pulley member 120 of the driving pulley or the driven pulley. You may make it determine based on the driving conditions required in order to make the frictional contact of the both frictional contact surfaces with an opposing surface uniform.

これによれば、駆動プーリ或いは従動プーリの固定プーリ部材１１０及び可動プーリ部材１２０に対するブロック２２０の両摩擦接触面の形状を、上記駆動条件に合わせて、変更することで、これらのプーリ部材との間のブロック２２０の不均一な摩擦接触を改善するに必要な幅広い対応が可能となる。   According to this, by changing the shape of both frictional contact surfaces of the block 220 with respect to the fixed pulley member 110 and the movable pulley member 120 of the driving pulley or the driven pulley according to the above driving conditions, The wide range of responses necessary to improve the non-uniform frictional contact between the blocks 220 in between is possible.

ここで、上記駆動条件としては、例えば、伝動装置Ｔの作動頻度が高い条件（駆動プーリの従動プーリとのプーリ比が０．５付近であること）、伝動装置Ｔの負荷が高い条件或いはＶベルトのスリップが発生し易い条件（上記プーリ比が２．０〜１．５付近であること）または伝動装置Ｔのノイズが大きい条件（上記プーリ比が１．５〜１の範囲であって、駆動プーリに作用する回転トルクが２０（Ｎｍ）〜４０（Ｎｍ）であること）が挙げられる。なお、上述のプーリ比と回転トルクの範囲は無段変速機の機種によって変わる。
（４）上記第１、第２或いは第３の実施形態にて述べた複数のブロック２２０は、一対の張力帯２１０に係止されることに限らず、１本のロープ状張力帯に係止されてもよい。この場合、各ブロック２２０は、その中央穴部に上記１本の張力帯を挿通するような構成とする。
（５）本発明は、上記第１、第２或いは第３の実施形態にて述べた伝動装置、即ち乾式の伝動装置の伝動ベルトに代えて、湿式の伝動装置の伝動ベルトに適用してもよい。この場合、湿式の伝動ベルトのブロックは、ブロック２２０とは異なり、被覆部材を有しない構造（つまり、ブロック本体２２０ａと同様の構造）となっている。そこで、湿式の伝動ベルトのブロックの両幅方向端面を、上記各実施形態のいずれかにて述べた両摩擦接触面と同様の形状に構成するようにしてもよい。これにより、湿式の伝動ベルト及びそのブロックにおいても、上記各実施形態と同様の作用効果が達成され得る。
（６）上記第１、第２或いは第３の実施形態にて述べた駆動プーリ１００或いは従動プーリは、固定プーリ部材及び可動プーリ部材で構成することに代えて、両可動プーリ部材で構成してもよい。
（７）本発明は、自動車用無段変速機の伝動装置に限ることなく、農業機械や土木建設機械用無段変速機の伝動装置その他各種産業機械用無段変速機の伝動装置に適用してもよい。 Here, as the drive condition, for example, a condition in which the operating frequency of the transmission device T is high (the pulley ratio of the drive pulley to the driven pulley is near 0.5), a condition in which the load of the transmission device T is high, or V Conditions where belt slip is likely to occur (the pulley ratio is in the vicinity of 2.0 to 1.5) or conditions where the noise of the transmission device T is large (the pulley ratio is in the range of 1.5 to 1, The rotational torque acting on the drive pulley is 20 (Nm) to 40 (Nm). The pulley ratio and the range of rotational torque described above vary depending on the type of continuously variable transmission.
(4) The plurality of blocks 220 described in the first, second, or third embodiment are not limited to being locked to the pair of tension bands 210, but are locked to one rope-like tension band. May be. In this case, each block 220 is configured such that the one tension band is inserted through the central hole.
(5) The present invention may be applied to a transmission belt of a wet transmission device in place of the transmission device described in the first, second or third embodiment, that is, a transmission belt of a dry transmission device. Good. In this case, unlike the block 220, the wet transmission belt block has a structure without a covering member (that is, a structure similar to the block main body 220a). Accordingly, both end faces in the width direction of the block of the wet transmission belt may be configured in the same shape as the both friction contact surfaces described in any of the above embodiments. Thereby, also in a wet transmission belt and its block, the effect similar to each said embodiment can be achieved.
(6) The driving pulley 100 or the driven pulley described in the first, second, or third embodiment is configured by both movable pulley members instead of the fixed pulley member and the movable pulley member. Also good.
(7) The present invention is not limited to transmission devices for continuously variable transmissions for automobiles, but is also applied to transmission devices for continuously variable transmissions for agricultural machinery and civil engineering machinery and other continuously variable transmissions for various industrial machines. May be.

本発明が適用される伝動装置の第１実施形態を示す部分概略斜視図である。It is a partial schematic perspective view which shows 1st Embodiment of the transmission device with which this invention is applied. 張力帯を組み付けてなる図１のブロックの斜視図である。It is a perspective view of the block of FIG. 1 formed by assembling a tension band. 図１にて３−３線に沿う断面図である。FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 図１のブロックの右側側面図である。It is a right side view of the block of FIG. 図１のブロックの平面図である。It is a top view of the block of FIG. 図５の要部拡大平面図である。It is a principal part enlarged plan view of FIG. 図１のブロックとプーリとの角度を示す概念図である。It is a conceptual diagram which shows the angle of the block and pulley of FIG. 本発明の第２実施形態の要部を示す平面図である。It is a top view which shows the principal part of 2nd Embodiment of this invention. 図８の要部拡大平面図である。It is a principal part enlarged plan view of FIG. 上記第２実施形態にて採用する金型を示す断面図である。It is sectional drawing which shows the metal mold | die employ | adopted in the said 2nd Embodiment. 本発明の第３実施形態の要部を示す平面図である。It is a top view which shows the principal part of 3rd Embodiment of this invention.

符号の説明Explanation of symbols

ａ、ｃ、ｅ…前端部、ｂ、ｄ、ｆ…後端部、Ｐ…板厚方向中心、
α、β、γ、δ…所定距離、１００…駆動プーリ、１１０…固定プーリ部材、
１２０…可動プーリ部材、２００…Ｖベルト、２１０…張力帯、２２０…ブロック、
２２０ａ…ブロック本体、２２０ｂ…被覆部材、
２２４、２２５、２２６…摩擦接触面（動力伝動面）、
２２４ａ、２２５ａ、２２６ａ…前側面部位、
２２４ｂ、２２５ｂ、２２６ｂ…後側面部位、２２５ｃ…段差。
a, c, e ... front end, b, d, f ... rear end, P ... thickness direction center,
α, β, γ, δ ... predetermined distance, 100 ... driving pulley, 110 ... fixed pulley member,
120 ... movable pulley member, 200 ... V belt, 210 ... tension band, 220 ... block,
220a ... Block body, 220b ... Coating member,
224, 225, 226 ... friction contact surface (power transmission surface),
224a, 225a, 226a ... front side surface part,
224b, 225b, 226b ... rear side surface portion, 225c ... step.

Claims (8)

互いに同軸的に位置する両プーリ部材の両円錐状対向面に対し両動力伝動面として対向する幅方向両端面を備えてなる伝動ベルト用ブロックにおいて、
前記両動力伝動面は、伝動ベルト進行方向の一端部から他端部にかけて、前記両円錐状対向面との間にて面圧を均一に発生可能な形状に形成されていることを特徴とする伝動ベルト用ブロック。 In a block for a transmission belt comprising both end faces in the width direction facing both conical opposing surfaces of both pulley members positioned coaxially as both power transmission surfaces,
Both the power transmission surfaces are formed in a shape capable of uniformly generating a surface pressure between the two conical opposing surfaces from one end portion to the other end portion in the transmission belt traveling direction. Transmission belt block. 互いに同軸的に位置する両プーリ部材の両円錐状対向面に対し対向する幅方向両端面を有する板状ブロック本体と、
このブロック本体の少なくとも前記両幅方向端面を被覆するように樹脂材料でもって形成し、その両幅方向端面を前記両円錐状対向面に対し摩擦接触可能に対向する両動力伝動面として有する被覆部材とを備える伝動ベルト用ブロックにおいて、
前記被覆部材は、前記両動力伝動面の伝動ベルト進行方向の一端部から他端部にかけて、前記両円錐状対向面との間にて面圧を均一に発生可能な形状に形成されていることを特徴とする伝動ベルト用ブロック。 A plate-like block main body having both end faces in the width direction opposed to both conical opposing faces of both pulley members positioned coaxially;
A covering member which is formed of a resin material so as to cover at least the both end surfaces in the width direction of the block main body and has both power direction end surfaces facing the both conical opposing surfaces so as to be in frictional contact. In a transmission belt block comprising:
The said covering member is formed in the shape which can generate | occur | produce a surface pressure uniformly between the said both conical opposing surfaces from the one end part of the transmission belt advancing direction of the said both power transmission surfaces to the other end part. Block for power transmission belt characterized by 前記両動力伝動面は、伝動ベルト進行方向の一端部にて、前記両円錐状対向面との間にて面圧を均一に発生するに適した距離だけ、他端部よりも、ブロック中心側またはその反対側にずれて位置することを特徴とする請求項１または２に記載の伝動ベルト用ブロック。   The two power transmission surfaces are located at one end of the transmission belt in the direction of travel of the transmission belt by a distance suitable for uniformly generating a surface pressure between the two conical facing surfaces and at the block center side from the other end. Alternatively, the transmission belt block according to claim 1, wherein the transmission belt block is shifted to the opposite side. 前記両動力伝動面は、伝動ベルト進行方向で凹形状に形成されていることを特徴とする請求項１〜３のいずれか１つに記載の伝動ベルト用ブロック。   The transmission belt block according to any one of claims 1 to 3, wherein the both power transmission surfaces are formed in a concave shape in the transmission belt traveling direction. 前記両動力伝動面は、伝動ベルト進行方向の一端部から他端部にかけて、前記両動力伝動面の外側に向け遠ざかるような段差形状に形成されていることを特徴とする請求項３に記載の伝動ベルト用ブロック。   The said both power transmission surface is formed in the level | step difference shape which goes away toward the outer side of said both power transmission surface from the one end part of a transmission belt advancing direction to the other end part. Transmission belt block. 前記両動力伝動面は、伝動ベルト進行方向の一端部から他端部にかけて、テーパ形状に形成されていることを特徴とする請求項３に記載の伝動ベルト用ブロック。   The transmission belt block according to claim 3, wherein the both power transmission surfaces are formed in a tapered shape from one end portion to the other end portion in the transmission belt traveling direction. 前記両動力伝動面は、伝動ベルト進行方向の一端部及び他端部の少なくとも一方にて、凸な湾曲形状に形成されていることを特徴とする請求項１〜６のいずれか１つに記載の伝動ベルト用ブロック。   Both the power transmission surfaces are formed in a convex curved shape at at least one of one end and the other end in the transmission belt traveling direction. Block for transmission belt. 無端状帯と、
請求項１〜７のいずれか１つに記載の複数の伝動ベルト用ブロックを備え、
当該複数のブロックは、それぞれ、前記両動力伝動面の伝動ベルト進行方向の一端部を他端部よりも前記無端状帯の進行方向側に位置させるように当該無端状帯に係止してなる伝動ベルト。
An endless strip,
A plurality of transmission belt blocks according to any one of claims 1 to 7,
Each of the plurality of blocks is engaged with the endless belt so that one end portion of the power transmission surfaces in the direction of travel of the transmission belt is positioned on the side of the endless belt in the travel direction of the other end portion. Transmission belt.
JP2006219264A 2006-08-11 2006-08-11 Transmission belt block and transmission belt Expired - Fee Related JP4934370B2 (en)

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JP2006219264A JP4934370B2 (en) 2006-08-11 2006-08-11 Transmission belt block and transmission belt
DE112007001858T DE112007001858T5 (en) 2006-08-11 2007-08-08 Block for drive belts and drive belts
PCT/JP2007/065550 WO2008018514A1 (en) 2006-08-11 2007-08-08 Block for power transmission belt and power transmission belt

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JPS5722441A (en) * 1980-07-16 1982-02-05 Nissan Motor Co Ltd Transmission v-belt
JPS58130151A (en) * 1982-01-27 1983-08-03 日本イトン工業株式会社 Manufacture of foamed concrete
JP2000104796A (en) * 1998-09-30 2000-04-11 Bando Chem Ind Ltd Manufacture of block to be used for v belt for high load transmission
JP2001090788A (en) * 1999-09-22 2001-04-03 Bando Chem Ind Ltd Heavy load transmission v belt
WO2005019684A1 (en) * 2003-08-26 2005-03-03 Fukuju Kogyo Kabushiki Kaisha Metallic belt and push block used therefor
JP2006010071A (en) * 2004-05-28 2006-01-12 Mitsuboshi Belting Ltd High load transmission belt
JP2006183850A (en) * 2004-12-28 2006-07-13 Toyota Motor Corp Block for belt and its forming method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130151U (en) * 1982-02-27 1983-09-02 トヨタ自動車株式会社 V block of drive belt for continuously variable transmission
JP2000310294A (en) 1999-04-23 2000-11-07 Daihatsu Motor Co Ltd V belt

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5722441A (en) * 1980-07-16 1982-02-05 Nissan Motor Co Ltd Transmission v-belt
JPS58130151A (en) * 1982-01-27 1983-08-03 日本イトン工業株式会社 Manufacture of foamed concrete
JP2000104796A (en) * 1998-09-30 2000-04-11 Bando Chem Ind Ltd Manufacture of block to be used for v belt for high load transmission
JP2001090788A (en) * 1999-09-22 2001-04-03 Bando Chem Ind Ltd Heavy load transmission v belt
WO2005019684A1 (en) * 2003-08-26 2005-03-03 Fukuju Kogyo Kabushiki Kaisha Metallic belt and push block used therefor
JP2006010071A (en) * 2004-05-28 2006-01-12 Mitsuboshi Belting Ltd High load transmission belt
JP2006183850A (en) * 2004-12-28 2006-07-13 Toyota Motor Corp Block for belt and its forming method

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