WO2017164123A1 - Dispositif de transmission de chaîne énergétique - Google Patents

Dispositif de transmission de chaîne énergétique Download PDF

Info

Publication number
WO2017164123A1
WO2017164123A1 PCT/JP2017/010938 JP2017010938W WO2017164123A1 WO 2017164123 A1 WO2017164123 A1 WO 2017164123A1 JP 2017010938 W JP2017010938 W JP 2017010938W WO 2017164123 A1 WO2017164123 A1 WO 2017164123A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain
guide
rollers
chain guide
roller
Prior art date
Application number
PCT/JP2017/010938
Other languages
English (en)
Japanese (ja)
Inventor
聞倬 馬
Original Assignee
Ntn株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2017164123A1 publication Critical patent/WO2017164123A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains

Definitions

  • the present invention mainly relates to a chain transmission that transmits rotation of a crankshaft of an automobile engine to a camshaft.
  • a timing chain hereinafter simply referred to as “chain”
  • chain a timing chain
  • a swingable chain guide extending along the running direction of the chain is provided on one side of the chain, and the timing chain is tensioned by applying an adjustment force of the chain tensioner to the swing side end of the chain guide.
  • a chain guide is provided in the chain on the tension side of the chain so that the chain is fixed, and the chain travel is guided by the fixed chain guide to suppress fluttering.
  • both ends of a plurality of roller shafts arranged in a curved shape are supported by a synthetic resin guide base extending long in the running direction of the chain.
  • a chain guide has been proposed in which a roller comprising a roller bearing is rotatably supported by each of the plurality of roller shafts, and the chain is guided to run freely by the plurality of rollers.
  • the chain is guided by rolling of a plurality of rollers.
  • the guide by the rolling of the roller has the characteristics that the running resistance of the chain is small and the torque transmission loss is small.
  • the chain guide described in Patent Document 2 can reduce noise during running of the chain.
  • the winding angle of the chain on the outer periphery of the roller closest to the crank sprocket may not be 170 ° or more. It was.
  • the noise during running of the chain affects not only the bending angle of the chain with respect to the roller closest to the chain sprocket of the chain guide but also the bending angle of the chain with respect to all rollers. It has been found that it is proportional to the maximum bending angle among the bending angles of all the rollers.
  • the bending angle of the chain with respect to the roller is the common of the two rollers 12 adjacent on the crank sprocket 2 side between the three rollers 12 arranged in the running direction of the chain 5, as shown in FIG.
  • the bending angle of the chain with respect to the roller closest to the crank sprocket 2 is the common tangent of the roller 12 closest to the crank sprocket 2 and the adjacent roller to the common tangent of the crank sprocket 2 and the roller 12 closest thereto.
  • the bending angle of the chain with respect to the roller closest to the cam sprocket 4 is the common tangent of the cam sprocket 4 and the roller 12 closest thereto with respect to the common tangent of the roller closest to the cam sprocket 4 and the roller adjacent thereto. The angle to make.
  • An object of the present invention is to reduce noise generated by running of a chain in a chain transmission device that rolls and guides the chain with a plurality of guide rollers provided in the chain guide.
  • the present invention provides a chain spanned between a crank sprocket provided on a crankshaft and a cam sprocket provided on a camshaft, and an outer side of a slack side chain of the chain.
  • a chain guide provided so as to be able to swing around one end, and applying an adjustment force of the chain tensioner to the swing side end of the chain guide to urge the chain guide toward the chain.
  • the chain transmission device that rolls and guides the chain by each of a plurality of rotatable rollers provided in the chain guide, a configuration is adopted in which the bending angles of the chain with respect to the plurality of rollers are equal to each other. can do.
  • the present invention provides a chain spanned between a crank sprocket provided on the crankshaft and a cam sprocket provided on the camshaft, and an outer side of the slack side chain of the chain.
  • a chain guide provided so as to be capable of swinging around one end, and applying an adjustment force of the chain tensioner to the swing side end of the chain guide to urge the chain guide toward the chain,
  • the number of the rollers provided on the chain guide is n, and the crank sprocket travels from the chain guide to the chain guide.
  • Each of the bending angles ⁇ i is defined based on a value obtained by dividing the total bending angle ⁇ a by the number n of rollers, and the variation thereof becomes small. For this reason, it is possible to suppress noise during chain running that increases in proportion to the maximum bending angle.
  • each of the bending angles ⁇ i is defined based on the total bending angle ⁇ a and the number n of rollers. For this reason, the noise at the time of chain travel can be suppressed irrespective of the size of the winding angle of the chain on the outer periphery of the roller closest to the crank sprocket.
  • This invention can suppress the noise during chain running by eliminating or reducing the variation in the bending angle of the chain with respect to all the rollers.
  • the chain transmission for driving the camshaft includes a crank sprocket 2 provided at the shaft end portion of the crankshaft 1 and a cam sprocket provided at each of the shaft end portions of the two camshafts 3.
  • a chain guide 6 provided on the outer side of the slack side chain 5a of the timing chain 5 so as to be able to swing around one end portion, and a crankshaft
  • the rotation of 1 is transmitted to the cam shaft 3 to rotate the cam shaft 3.
  • the crankshaft 1 rotates in the direction indicated by the arrow in FIG. 1, and the timing chain 5 (hereinafter simply referred to as the chain) travels in the direction indicated by the arrow in FIG.
  • the portion of the chain 5 that travels upward is the slack side chain 5a, and the portion that travels downward is the tension side chain 5b.
  • the slack side chain 5a has a chain guide 6 for tension adjustment provided on the outside thereof, and the tension side chain 5b has a chain guide 7 for travel guidance provided on the outside thereof.
  • the chain guide 6 for tension adjustment includes a guide base 10 extending long in the traveling direction of the chain 5, a plurality of roller shafts 11 provided at intervals in the length direction of the guide base 10, and a plurality of roller shafts 11. It comprises a plurality of chain guide rollers 12 that are rotatably supported by each.
  • the guide base 10 has a curved shape, and a pair of guide protrusions 13 extending in the length direction of the guide base 10 are provided on both sides in the width direction of the convex surface facing the chain 5, and between the pair of guide protrusions 13. , A plurality of roller receiving recesses 14 are provided at intervals in the length direction of the guide base 10.
  • the guide base 10 has an insertion hole 16 formed at the upper end portion through which the fulcrum shaft 15 is inserted, and is excellent in oil resistance, weather resistance and strength of polyamide 46 (PA46) and polyamide 66 (PA66). It consists of a molded product of synthetic resin.
  • the shaft end portion of the roller shaft 11 is fixed between the inner wall surface portions 17 and 17 opposed in the width direction.
  • the roller shaft 11 is made of SUJ2 or SC material, and is heat-treated to increase the hardness in order to improve wear resistance.
  • bright quenching is employed as the heat treatment, but induction quenching or carburizing quenching may be performed. Alternatively, carbonitriding may be performed.
  • the roller 12 is made of a roller bearing, and has a shell-shaped outer ring 18 formed by drawing a metal plate such as SPC or SCM, and a retainer 20 that holds a plurality of rollers 19 and 19 incorporated therein.
  • the chain guide 6 is supported by a fulcrum shaft 15 projecting from an engine block (not shown) in a state along the traveling direction of the slack side chain 5a, and swings around the fulcrum shaft 15. It is possible to move.
  • the chain guide 6 is urged toward the slack side chain 5a by the adjustment force of the chain tensioner 21 being applied to the lower swing side end.
  • the chain guide 6 rolls and guides the slack side chain 5a by each of the plurality of rollers 12 that come into contact with the slack side chain 5a.
  • the travel guide chain guide 7 is the same as the chain guide 6 for tension adjustment except that the shape of the guide base is different from the guide base 10 in the chain guide 6 for tension adjustment. It is configured. For this reason, the same components as those of the chain guide 6 for tension adjustment are denoted by the same reference numerals and description thereof is omitted.
  • the chain guide 7 for traveling guide is fixed by tightening bolts 22 screwed into an engine block (not shown) at both upper and lower ends in a state along the traveling direction of the tension side chain 5b. The travel of the chain 5 is guided.
  • the chain 5 guided by each of the plurality of rollers 12 of the chain guide 6 for tension adjustment and the chain guide 7 for travel guidance is linear between adjacent rollers 12 and is in each of the positions in contact with the rollers 12. It bends and collides with the outer periphery of the roller 12 to generate noise.
  • the bending angles ⁇ of the chains 5 with respect to all the rollers 12 shown in FIG. 3 are made equal. For this reason, there is no variation in the respective bending angles ⁇ , and the noise during chain running caused by the maximum bending angle can be reduced.
  • the chain rolling device of this embodiment can be applied to the crankshaft of any engine such as an automobile or a motorcycle.
  • the number of cylinders of the engine may be single cylinder or multi-cylinder. For example, by applying to a crankshaft for a four-cycle multi-cylinder engine, an effect of reducing noise during chain running can be expected. .
  • the bending angle of the chain 5 with respect to all the rollers 12 is the total of the trajectory of the chain 5 traveling from the crank sprocket 2 to the chain guide 6 and the trajectory of the chain 5 traveling from the chain guide 6 to the cam sprocket 4. It differs from the first embodiment described above in that it is defined based on the bending angle.
  • the other structure is considered to be the same as that of the first embodiment, and the same reference numerals are given and description thereof is omitted.
  • the bending angles of the chains 5 with respect to all the rollers 12 are set as follows.
  • the number of rollers 12 provided on the chain guide 6 is n, and the total bend formed by the track of the chain 5 traveling from the crank sprocket 2 to the chain guide 6 and the track of the chain 5 traveling from the chain guide 6 to the cam sprocket 4.
  • the angle is ⁇ a
  • the bending angle ⁇ i of the chain 5 with respect to the i-th roller 12 in the traveling direction of the chain 5 from the crank sprocket 2 side is expressed by ( ⁇ a / n) ⁇ 0.95 ⁇ ⁇ i ⁇ ( ⁇ a / n) ⁇ 1.05 (n: integer) (1) It is prescribed to satisfy.
  • the number of rollers 12 provided in the chain guide 6 shown in FIG. 4 is five. For this reason, for example, as the bending angle ⁇ 1 of the chain 5 with respect to the first roller 12, the following equation (2) ( ⁇ a / 5) ⁇ 0.95 ⁇ ⁇ 1 ⁇ ( ⁇ a / 5) ⁇ 1.05 (2) It is prescribed to satisfy.
  • the bending angles ⁇ 2 to ⁇ 5 of the chain 5 with respect to the second to fifth rollers 12 are defined so as to satisfy the above formula (1), similarly to the bending angle ⁇ 1.
  • the bending angles ⁇ 1 to ⁇ 5 thus defined are defined within a range of ⁇ 5% with respect to a value obtained by dividing the total bending angle ⁇ a by the number n of the rollers 12. Therefore, variations in the bending angles ⁇ 1 to ⁇ 5 can be suppressed, and noise during chain running that increases in proportion to the maximum bending angle can be suppressed.
  • the chain winding angle at the outer periphery of the roller closest to the crank sprocket is changed as in the chain guide of Patent Document 2. In some cases, the angle cannot be set to 170 ° or more.
  • each of the bending angles ⁇ 1 to ⁇ 5 of the chain 5 with respect to all the rollers 12 is defined based on the total bending angle ⁇ a and the number n of the rollers 12. For this reason, the noise at the time of chain travel can be suppressed irrespective of the size of the winding angle of the chain on the outer periphery of the roller closest to the crank sprocket.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

La présente invention concerne un dispositif de transmission de chaîne énergétique dans lequel la force de réglage d'un tendeur de chaîne (21) est appliquée à une chaîne (5) montée entre un pignon de manivelle (2) placé sur un vilebrequin (1) et un pignon de came (4) placé sur un arbre à cames (3), et est également appliquée à l'extrémité côté oscillation d'un guide de chaîne (6) placé à l'extérieur de la chaîne côté mou (5a) de la chaîne (5) de façon à pouvoir osciller autour d'une extrémité du guide de chaîne (6), pressant ainsi le guide de chaîne (6) vers la chaîne (5) pour amener chaque rouleau rotatif d'une pluralité de rouleaux rotatifs (12) placés sur le guide de chaîne (6) à guider la chaîne (5) pendant le roulement. Les angles de flexion de la chaîne (5) par rapport à la pluralité de rouleaux (12) sont égalisés pour réduire le bruit.
PCT/JP2017/010938 2016-03-23 2017-03-17 Dispositif de transmission de chaîne énergétique WO2017164123A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016058476A JP6190484B1 (ja) 2016-03-23 2016-03-23 チェーン伝動装置
JP2016-058476 2016-03-23

Publications (1)

Publication Number Publication Date
WO2017164123A1 true WO2017164123A1 (fr) 2017-09-28

Family

ID=59720417

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/010938 WO2017164123A1 (fr) 2016-03-23 2017-03-17 Dispositif de transmission de chaîne énergétique

Country Status (2)

Country Link
JP (1) JP6190484B1 (fr)
WO (1) WO2017164123A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001187948A (ja) * 1999-12-28 2001-07-10 Unitta Co Ltd 駆動伝達装置
JP2013072500A (ja) * 2011-09-28 2013-04-22 Ntn Corp チェーンガイドおよびチェーン伝動装置
JP2015152119A (ja) * 2014-02-17 2015-08-24 Ntn株式会社 カム軸駆動用チェーン伝動装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001187948A (ja) * 1999-12-28 2001-07-10 Unitta Co Ltd 駆動伝達装置
JP2013072500A (ja) * 2011-09-28 2013-04-22 Ntn Corp チェーンガイドおよびチェーン伝動装置
JP2015152119A (ja) * 2014-02-17 2015-08-24 Ntn株式会社 カム軸駆動用チェーン伝動装置

Also Published As

Publication number Publication date
JP6190484B1 (ja) 2017-08-30
JP2017172672A (ja) 2017-09-28

Similar Documents

Publication Publication Date Title
JP5706261B2 (ja) カム軸駆動用のチェーン伝動装置
US20140087903A1 (en) Chain tensioner lever
JP6205291B2 (ja) カム軸駆動用チェーン伝動装置
US7014585B2 (en) Blade-type chain tensioner system
JP6190484B1 (ja) チェーン伝動装置
JP5897345B2 (ja) タイミングチェーン駆動装置
US9879763B2 (en) Chain guide and chain transmission device
US9593750B2 (en) Chain guide and chain transmission device
WO2013011916A1 (fr) Guide-chaîne et pignon d'entraînement de chaîne
JP6034566B2 (ja) チェーンガイドおよびチェーン伝動装置
JP5933349B2 (ja) チェーンガイドおよびチェーン伝動装置
JP6059586B2 (ja) チェーンガイドおよびチェーン伝動装置
WO2015080208A1 (fr) Guide-chaîne et dispositif d'entraînement à chaîne
JP6034567B2 (ja) チェーンガイドおよびチェーン伝動装置
JP5706260B2 (ja) チェーンガイドおよびチェーン伝動装置
JP2016148395A (ja) ベルトテンショナおよびベルト伝動装置
JP5706259B2 (ja) チェーンガイドおよびチェーン伝動装置
JP2015068353A (ja) チェーンガイドおよびチェーン伝動装置
JP2014001821A (ja) チェーンガイドおよびチェーン伝動装置

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17770165

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17770165

Country of ref document: EP

Kind code of ref document: A1