WO2022034820A1 - Belt transmission device - Google Patents

Belt transmission device Download PDF

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Publication number
WO2022034820A1
WO2022034820A1 PCT/JP2021/028550 JP2021028550W WO2022034820A1 WO 2022034820 A1 WO2022034820 A1 WO 2022034820A1 JP 2021028550 W JP2021028550 W JP 2021028550W WO 2022034820 A1 WO2022034820 A1 WO 2022034820A1
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WO
WIPO (PCT)
Prior art keywords
pulley
belt
tensioner
pulleys
auxiliary machine
Prior art date
Application number
PCT/JP2021/028550
Other languages
French (fr)
Japanese (ja)
Inventor
啓介 小村
輝展 蒲原
文民 勘解由
慎司 上野
翼 國丹
裕貴 徳丸
Original Assignee
三菱自動車工業株式会社
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 三菱自動車工業株式会社 filed Critical 三菱自動車工業株式会社
Priority to CN202180056035.5A priority Critical patent/CN116075656A/en
Priority to JP2022542806A priority patent/JP7338795B2/en
Publication of WO2022034820A1 publication Critical patent/WO2022034820A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley

Definitions

  • This disclosure relates to a belt transmission device.
  • Patent Document 1 includes a crank pulley fixed to a crank shaft of an internal combustion engine, an auxiliary machine pulley fixed to a rotating shaft of an auxiliary machine provided in parallel with the crank shaft, and a crank pulley and an auxiliary machine pulley.
  • a belt wound around a plurality of pulleys and a pair of tensioner pulleys that can swing around the rotation axis of the auxiliary pulley are arranged with the auxiliary pulley as a boundary in the circulation direction of the belt, and tension is applied to the belt.
  • a belt transmission device comprising a belt tensioner to be applied is disclosed.
  • the tensioner pulley is flipped by the belt when the belt is suddenly stretched due to the initial explosion of the internal combustion engine, and when the flipped tensioner pulley returns to the belt, it becomes the tensioner pulley. Produces a tapping sound.
  • the belt transmission device includes a crank pulley fixed to a crank shaft of an internal combustion engine, an auxiliary machine pulley fixed to a rotating shaft of an auxiliary machine provided in parallel with the crank shaft, and the crank. It is possible to swing around a belt wound around a plurality of pulleys including the pulley and the auxiliary machine pulley and a swing axis extending in parallel with the rotation axis of the auxiliary machine pulley, and in the circulation direction of the belt.
  • a pair of tensioner pulleys are arranged with the auxiliary machine pulley as a boundary, and a belt tensioner for applying tension to the belt is provided.
  • one of the pair of tensioner pulleys is bulleted by the belt.
  • the weight of one of the tensioner pulleys is set to be heavier than the weight of the other tensioner pulley so as to be difficult to crank.
  • the tensioner pulley is less likely to be flipped by the belt on either side.
  • the tapping sound generated in the tensioner pulley can be suppressed.
  • one of the tensioner pulleys is a tensioner pulley arranged on the downstream side of the auxiliary machine pulley in the circulation direction of the belt.
  • the belt on the downstream side of the auxiliary pulley in the circulation direction of the belt is easy to be stretched when the rotation speed of the internal combustion engine fluctuates greatly. According to the above configuration, even if the belt on the downstream side of the accessory pulley is suddenly stretched in the circulation direction of the belt, the tensioner pulley is less likely to be flipped by the belt on the downstream side of the accessory pulley, and the striking that occurs on the tensioner pulley. Sound can be suppressed.
  • the auxiliary machine is a starter in which the rotating shaft is driven by supplying electric power when the internal combustion engine is started.
  • the rotation shaft of the auxiliary machine (motor generator) is driven by supplying electric power when the internal combustion engine is started, and the belt on the upstream side of the auxiliary machine pulley (MG pulley) is stretched in the circulation direction of the belt, and the belt on the downstream side is stretched. Loosen. After that, the crank shaft starts to rotate due to the initial explosion of the internal combustion engine, and the belt on the downstream side of the auxiliary pulley (MG pulley) is suddenly stretched in the circulation direction of the belt, so that the tensioner pulley on the downstream side of the auxiliary pulley is bulleted. Easy to get rid of.
  • the belt on the downstream side of the auxiliary machine pulley (MG pulley) is stretched in the circulation direction of the belt and is on the upstream side.
  • the belt loosens.
  • the belt on the upstream side of the auxiliary machine pulley (MG pulley) is suddenly stretched in the circulation direction of the belt, so that the belt on the upstream side of the auxiliary machine pulley is stretched.
  • the tensioner pulley is easy to flip.
  • the pair of tensioner pulleys arranged with the motor generator as a boundary are easily flipped by the belt. According to the above configuration, the pair of tensioner pulleys tensioner pulleys arranged with the motor generator as a boundary are less likely to be flipped by the belt, and the tapping sound generated in the tensioner pulley can be suppressed.
  • the tensioner arranged on the downstream side of the accessory pulley in the circulation direction of the belt is arranged so that the tensioner pulley is less likely to be repelled by the belt.
  • the weight of the pulley is set to be heavier than the weight of the tensioner pulley arranged on the upstream side of the accessory pulley in the circulation direction of the belt.
  • the plurality of pulleys are provided on the upstream side pulley provided on the upstream side of the auxiliary machine pulley and on the downstream side of the auxiliary machine pulley in the circulation direction of the belt.
  • the length of the belt from the auxiliary pulley to the downstream pulley is longer than the length of the belt from the upstream pulley to the auxiliary pulley, and any of the above.
  • One tensioner pulley is arranged between the auxiliary machine pulley and the downstream pulley.
  • the length of the belt from the auxiliary pulley to the downstream pulley is longer than the length of the belt from the upstream pulley to the auxiliary pulley, so that it is downstream of the auxiliary pulley in the circulation direction of the belt.
  • the tensioner pulley arranged on the side is easier to be flipped than the tensioner pulley on the upstream side.
  • one of the tensioner pulleys which is heavier than the weight of the other tensioner pulley, is placed between the auxiliary pulley and the downstream pulley, so that the tensioner pulley is less likely to be flipped and the tensioner is not easily flipped.
  • the tapping sound generated in the pulley can be suppressed.
  • the belt tensioner is fixed to the internal combustion engine, the first arm and the second arm on which the pair of tensioner pulleys are supported, respectively, and the first arm and the second arm.
  • Each of the pair of tensioner pulleys includes a housing in which the arms are rotatably supported, a pulley body, a fastening member for attaching the pulley body to the first arm or the second arm, and the pulley body, respectively.
  • the one of the tensioners has a spacer provided between the and the fastening member, and the weight of the one of the tensioner pulleys is heavier than the weight of the tensioner pulley of the other of the above.
  • the thickness of the spacer of the pulley is set to be thicker than the thickness of the spacer of any one of the tensioner pulleys.
  • the thickness of the spacer of one of the tensioner pulleys is made thicker than the thickness of the spacer of either of the other tensioner pulleys, and the weight of either of the tensioner pulleys is the weight of either of the other tensioners. Since it can be heavier than the weight of the pulley, it is not necessary to change the weight of the pulley body, and parts can be shared.
  • FIG. 3 is a front view of the belt tensioner shown in FIG. 2 as viewed from the internal combustion engine side. It is an exploded perspective view which shows the housing and an arm assembly shown in FIG. It is an exploded perspective view of the arm assembly shown in FIG.
  • FIG. 3 is a sectional view taken along line VI-VI showing the structure of the tensioner pulley shown in FIG.
  • FIG. 3 is a sectional view taken along line VII-VII showing the structure of the tensioner pulley shown in FIG.
  • FIG. 1 is a front view schematically showing a belt transmission device 1 according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of the belt tensioner 5 according to the embodiment of the present invention as viewed from the internal combustion engine 21 side
  • FIG. 3 is a front view of the belt tensioner 5 shown in FIG. 2 as viewed from the internal combustion engine 21 side.
  • FIG. 4 is an exploded perspective view showing the arm assembly 54 and the housing 57 shown in FIG. 2
  • FIG. 5 is an exploded perspective view of the arm assembly 54 shown in FIG. 6 is a VI-VI line sectional view showing the structure of the tensioner pulley 51 shown in FIG. 3, and
  • FIG. 7 is a VII-VII line sectional view showing the structure of the tensioner pulley 52 shown in FIG.
  • the belt transmission device 1 includes a crank pulley 2, an auxiliary machine pulley 3, a belt 4, and a belt tensioner 5.
  • the crank pulley 2 is a pulley fixed to the crank shaft 211 of the internal combustion engine 21.
  • the crank shaft 211 is the main shaft of the internal combustion engine 21, and is arranged substantially in the center of the lower region of the internal combustion engine 21.
  • the crank pulley 2 is rotated by the rotation of the crank shaft 211.
  • the auxiliary machine pulley 3 is a pulley fixed to the rotating shaft 311 of the auxiliary machine 31 provided in parallel with the crank shaft 211 of the internal combustion engine 21.
  • the auxiliary machine 31 is a device driven by the internal combustion engine 21.
  • the auxiliary machine 31 is, for example, a motor generator 31A, but is not limited to this, and may be a water pump (not shown), a compressor 31C for an air conditioner, or the like.
  • the belt 4 is wound around a plurality of pulleys including the crank pulley 2 and the auxiliary machine pulley 3.
  • the plurality of pulleys include, for example, a water pump pulley 3B provided on the rotary shaft 311B of the water pump, and an air conditioner pulley 3C provided on the rotary shaft 311C of the compressor 31C for the air conditioner.
  • the idler pulley 6 the plurality of pulleys need not include all of these pulleys, and may have at least a crank pulley 2 and an auxiliary pulley 3. Further, as shown in FIG.
  • an idler pulley 7 for applying tension may be provided between the air conditioner pulley 3C and the crank pulley 2.
  • the rotational torque of the crank pulley 2 is transmitted to the auxiliary pulley 3 via the belt 4.
  • the rotational torque of the auxiliary machine pulley 3 is transmitted to the crank pulley 2 via the belt 4.
  • the belt tensioner 5 can swing around an axis parallel to the rotation shaft 311 of the auxiliary machine pulley 3, and a pair of tensioner pulleys 51 and 52 are arranged with the auxiliary machine pulley 3 as a boundary in the circulation direction of the belt 4. , Apply tension to the belt 4.
  • the pair of tensioner pulleys 51 and 52 of the belt tensioner 5 can swing individually.
  • a plate-shaped spring 53 for connecting the pair of tensioner pulleys 51 and 52 to each other is provided between the pair of tensioner pulleys 51 and 52.
  • the stretched belt 4 pushes up one tensioner pulley 51 (52) and the other tensioner. Push down the pulley 52 (51) to remove the slack in the loosened belt 4.
  • the pair of tensioner pulleys 51 and 52 are provided so that their centers sandwich a line extending in the vertical direction passing through the swing axis of the belt tensioner 5.
  • the pair of tensioner pulleys 51 and 52 is one of the tensioner pulleys 51 so that one of the pair of tensioner pulleys 51 and 52 is less likely to be flipped by the belt 4.
  • the weight of (52) is made heavier than the weight of either tensioner pulley 52 (51).
  • one of the tensioner pulleys 51 (52) is heavy, so that it is difficult to be repelled by the belt 4, and it is possible to suppress the tapping sound generated when the tensioner pulley 51 (52) returns to the belt 4 side and collides with the belt 4 after being repelled.
  • the entire belt tensioner 5 tends to swing in the direction in which one tensioner pulley 51 (52) moves downward, so that the other tensioner pulley 52 (51) is flipped. At that time, the force to return to the belt 4 side is weakened, and the tapping sound generated when the belt 4 collides with the belt 4 can be suppressed.
  • the tensioner pulleys 51 and 52 collided with the belt 4 by making the weights of the pair of tensioner pulleys 51 and 52 different so that one of the tensioner pulleys 51 (52) is less likely to be flipped by the belt 4. It is possible to suppress the tapping sound generated at that time. At this time, the one tensioner pulley 51 (52) having a heavier weight has a higher tapping sound suppressing effect than the other tensioner pulley 52 (51).
  • the belt 4 on the downstream side of the auxiliary pulley 3 is suddenly stretched in the circulation direction of the belt 4, so that the tensioner pulley 51 is arranged on the downstream side of the auxiliary pulley 3 in the circulation direction of the belt 4.
  • the weight of the tensioner pulley 51 arranged on the downstream side is heavier than that of the auxiliary pulley 3 so that the tensioner pulley 51 arranged on the downstream side is less likely to be flipped by the belt 4.
  • the weight is heavier than the weight of the tensioner pulley 52 arranged on the upstream side.
  • the weight of the tensioner pulley 51 arranged on the downstream side of the auxiliary machine pulley 3 is, for example, about 90 g heavier than the weight of the tensioner pulley 52 arranged on the upstream side.
  • the belt 4 on the upstream side of the auxiliary pulley 3 is suddenly stretched in the circulation direction of the belt 4, so that the tensioner pulley 52 is arranged on the upstream side of the auxiliary pulley 3 in the circulation direction of the belt 4.
  • the weight of the tensioner pulley 52 arranged on the upstream side is heavier than that of the auxiliary pulley 3 so that the tensioner pulley 52 arranged on the upstream side is less likely to be flipped by the belt 4. It is preferable that the weight is heavier than the weight of the tensioner pulley 51 arranged on the downstream side.
  • the weight of the tensioner pulley 52 arranged on the upstream side of the auxiliary machine pulley 3 is, for example, about 90 g heavier than the weight of the tensioner pulley 51 arranged on the downstream side.
  • one of the above-mentioned tensioner pulleys 51 (52) is a tensioner pulley 51 arranged on the downstream side of the auxiliary pulley 3 in the circulation direction of the belt 4.
  • One of the tensioner pulleys 51 (52) described above is a pulley heavier than the weight of the other tensioner pulley 52 (51), and in the belt transmission device 1 according to the embodiment of the present invention, the tensioner pulley 51 (52) supplements in the circulation direction of the belt 4.
  • the weight of the tensioner pulley 51 arranged on the downstream side of the auxiliary machine pulley 3 is arranged on the upstream side so that the tensioner pulley 51 arranged on the downstream side of the machine pulley 3 is less likely to be flipped by the belt 4. It is set heavier than the weight of 52.
  • the tensioner pulley 51 arranged on the downstream side of the auxiliary machine pulley 3 is used. Easy to be flipped by the belt 4. According to the belt transmission device 1 according to the embodiment of the present invention described above, even if the belt 4 on the downstream side of the auxiliary pulley 3 is suddenly stretched in the circulation direction of the belt 4, the tensioner pulley is on the downstream side of the auxiliary pulley 3. The 51 is less likely to be flipped by the belt 4, and the tapping sound generated in the tensioner pulley 51 can be suppressed.
  • the auxiliary machine 31 is a motor generator 31A.
  • the rotary shaft 311A is driven by supplying power when the internal combustion engine 21 is started, and the rotary torque of the motor generator pulley 3A (hereinafter referred to as "MG pulley 3A") fixed to the rotary shaft 311A is a belt.
  • MG pulley 3A the motor generator pulley 3A
  • the crank pulley 2 via 4 it functions as a starter capable of rotating (cranking) the crank shaft 211 to which the crank pulley 2 is fixed.
  • the motor generator 31A also functions as a generator capable of rotating the rotation shaft 311A and generating electricity by transmitting the rotational torque of the crank pulley 2 to the MG pulley 3A via the belt 4.
  • the motor generator 31A may have a function of assisting the rotation of the crank pulley 2 (that is, the crank shaft 211) by supplying electric power during the operation of the internal combustion engine 21.
  • the rotating shaft 311A of the motor generator 31A is driven, and the belt 4 on the downstream side of the MG pulley 3A loosens in the circulation direction of the belt 4.
  • the crank shaft 211 starts to rotate due to the initial explosion of the internal combustion engine 21, and the belt 4 on the downstream side of the MG pulley 3A is suddenly stretched in the circulation direction of the belt 4, so that the tensioner pulley 51 on the downstream side of the MG pulley 3A becomes It is easy to be played.
  • the tensioner pulley 51 located on the downstream side in the circulation direction of the belt 4 of the motor generator 31A functioning as a starter is easily flipped by the belt 4.
  • the belt transmission device 1 it is possible to suppress the tapping sound generated when the tensioner pulleys 51 and 52 collide with the belt 4 even with such a configuration.
  • the motor generator 31A has a function of assisting the rotation of the crank pulley 2, the belt 4 on the upstream side of the MG pulley 3A loosens in the circulation direction of the belt 4 before the assist starts, and the belt 4 at the start of the assist. Since the belt 4 on the upstream side of the MG pulley 3A is stretched in the circulation direction of the above, the tensioner pulley 52 located on the upstream side in the circulation direction of the belt 4 of the motor generator 31A is easily flipped by the belt 4. Even in such a case, the belt transmission device 1 according to the embodiment of the present invention described above can suppress the tapping sound generated when the tensioner pulleys 51 and 52 collide with the belt 4.
  • the tensioner pulley 51 (hereinafter referred to as “power running side tensioner pulley 51”) is arranged on the downstream side of the MG pulley 3A in the circulation direction of the belt 4 at the time of the initial explosion of the internal combustion engine 21. ) Is arranged on the upstream side of the auxiliary pulley 3 in the circulation direction of the belt 4 so that the weight of the tensioner pulley 51 on the power running side is less likely to be repelled by the belt 4 (hereinafter, “regeneration side tensioner pulley 52””. Make it heavier than the weight of).
  • the tensioner pulley 51 on the power running side Is less likely to be flipped, and the tapping sound generated on the tensioner pulley 51 on the power running side can be suppressed.
  • the noise generated in the internal combustion engine 21 is smaller than that during the operation of the internal combustion engine 21, and the tapping sound generated when the tensioner pulleys 51 and 52 collide with the belt 4 is conspicuous. It is preferable to make the tensioner pulley 51 on the easy force running side heavier.
  • the plurality of pulleys are provided on the upstream side pulley 8 provided on the upstream side of the auxiliary machine pulley 3 in the circulation direction of the belt 4 and on the downstream side of the auxiliary machine pulley 3. Further includes the downstream pulley 9 provided.
  • the upstream pulley 8 provided on the upstream side of the auxiliary pulley 3 is an idler pulley 6, and the downstream pulley 9 provided on the downstream side of the auxiliary pulley 3 is an air conditioner pulley 3C.
  • the length of the belt 4 from the auxiliary pulley 3 to the downstream pulley 9 is longer than the length of the belt 4 from the upstream pulley 8 to the auxiliary pulley 3, and the length of the tensioner pulley 52 (51) of either one is longer.
  • One of the tensioner pulleys 51 (52), which is heavier than the weight, is arranged between the auxiliary machine pulley 3 and the downstream pulley 9.
  • the auxiliary pulley 3 is the MG pulley 3A
  • the downstream pulley 9 is the air conditioner pulley 3C
  • the upstream pulley 8 is the idler pulley 6
  • the length of the belt 4 from the MG pulley 3A to the air conditioner pulley 3C is the idler.
  • the power running side tensioner pulley 51 which is longer than the length of the belt 4 from the pulley 6 to the MG pulley 3A and heavier than the regenerative side tensioner pulley 52, is arranged between the MG pulley 3A and the air conditioner pulley 3C.
  • the length of the belt 4 from the auxiliary pulley 3 to the downstream pulley 9 is the length of the belt 4 from the upstream pulley 8 to the auxiliary pulley 3. Since it is longer than that, the tensioner pulley 51 arranged on the downstream side of the auxiliary pulley 3 in the circulation direction of the belt 4 is more likely to be flipped than the tensioner pulley 52 on the upstream side. Since one of the tensioner pulleys 51, which is heavier than the other tensioner pulley 52, is arranged between the auxiliary pulley 3 and the downstream pulley 9, the tensioner pulley 51 becomes difficult to be flipped and occurs in the tensioner pulley 51. The tapping sound can be suppressed.
  • the belt tensioner 5 includes a first arm 55, a second arm 56, and a housing 57.
  • the first arm 55 and the second arm 56 are components on which the pair of tensioner pulleys 51 and 52 described above are supported, respectively.
  • the first arm 55 and the second arm 56 are combined to form one arm assembly 54, and as shown in FIG. 5, they can swing independently of each other.
  • the housing 57 is fixed to the auxiliary machine 31 (motor generator 31A), and the first arm 55 and the second arm 56 are supported so as to be swingable.
  • the pair of tensioner pulleys 51 and 52 have a pulley body 511,521, bolts 512,522 and spacers 513,523, respectively.
  • the bolts 512 and 522 are fastening members that rotatably attach the pulley bodies 511,521 to the first arm 55 or the second arm 56.
  • Spacers 513 and 523 are provided between the pulley main body 511 and 521 and the bolts 512 and 522.
  • FIGS. 6 and 7 the shapes of the first arm 55 and the second arm 56 are simplified and described. In the example shown in FIGS.
  • bearings 514 and 524 are provided between the shaft members 551 and 561 provided on the first arm 55 or the second arm 56 and the pulley main bodies 511, 521, and the bearings 514 and 514 are provided. Spacers 513 and 523 are fitted to the 524. Then, the bearings 514 and 524 are fixed between the spacers 513 and 523 and the shaft members 551 and 561 by the bolts 512 and 522 penetrating the spacers 513 and 523.
  • the spacers 513 and 523 are used to prevent foreign matter from entering the tensioner pulleys 51 and 52 through the gap between the pulley bodies 51 and 521 and the bolts 512 and 522, thereby hindering the rotation of the tensioner pulleys 51 and 52.
  • the members are made of the same material for both spacers 513 and 523, for example, a metal plate.
  • the spacer 513 (523) of one of the tensioner pulleys 51 (52) is heavier than the weight of either of the tensioner pulleys 52 (51).
  • the heavier tensioner pulley 51 (52) is made heavier than the other tensioner pulley 52 (51).
  • the thickness of the spacer 513 (523) of one of the tensioner pulleys 51 (52) is larger than the weight of the other tensioner pulley 52 (51).
  • the weight of either one of the tensioner pulleys 51 (52) can be made heavier than the weight of either of the other tensioner pulleys 52. Therefore, even if the pair of pulley bodies 511,521 are formed of the same material and shape, the weights of the pair of tensioner pulleys 51, 52 can be different. Therefore, it is necessary to make the manufacturing method different for each pulley body 511,521. There is no such thing, and the cost can be reduced.
  • the present invention is not limited to the above-described embodiment, and includes a modification of the above-mentioned embodiment and a combination of these embodiments as appropriate.

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

Abstract

A belt transmission device according to the present invention comprises: a crank pulley; an accessory pulley; a belt which is wound on a plurality of pulleys; and a belt tensioner which imparts tension to the belt, which can swing about a swinging axis that extends parallel to the rotational axis of the accessory pulley, and in which a pair of tensioner pulleys are disposed on opposite sides of the accessory pulley in the circulation direction of the belt. One of the pair of tensioner pulleys is set to be heavier than the other of the pair of tensioner pulleys so that the one of the pair of tensioner pulleys is less likely to be pushed away by the belt.

Description

ベルト伝動装置Belt transmission device
　本開示は、ベルト伝動装置に関する。 This disclosure relates to a belt transmission device.
　特許文献１には、内燃機関のクランク軸に固定されたクランクプーリと、クランク軸と平行に設けられた補機の回転軸に固定された補機プーリと、クランクプーリと補機プーリとを含む複数のプーリに巻き掛けられたベルトと、補機プーリの回転軸を中心として揺動可能であって、ベルトの循環方向において補機プーリを境に一対のテンショナプーリが配置され、ベルトに張力を付与するベルトテンショナと、を備えるベルト伝動装置が開示されている。 Patent Document 1 includes a crank pulley fixed to a crank shaft of an internal combustion engine, an auxiliary machine pulley fixed to a rotating shaft of an auxiliary machine provided in parallel with the crank shaft, and a crank pulley and an auxiliary machine pulley. A belt wound around a plurality of pulleys and a pair of tensioner pulleys that can swing around the rotation axis of the auxiliary pulley are arranged with the auxiliary pulley as a boundary in the circulation direction of the belt, and tension is applied to the belt. A belt transmission device comprising a belt tensioner to be applied is disclosed.
日本国特開２０１５－２２４６１３号公報Japanese Patent Application Laid-Open No. 2015-224613
　特許文献１に開示されたベルト伝動装置では、内燃機関の初爆等によりベルトが急激に張ることで、テンショナプーリがベルトに弾かれ、弾かれたテンショナプーリがベルトに復帰する際にテンショナプーリに打音を生じる。 In the belt transmission device disclosed in Patent Document 1, the tensioner pulley is flipped by the belt when the belt is suddenly stretched due to the initial explosion of the internal combustion engine, and when the flipped tensioner pulley returns to the belt, it becomes the tensioner pulley. Produces a tapping sound.
　上述の事情に鑑みて、本発明の実施形態は、テンショナプーリに生じる打音を抑制できるベルト伝動装置を提供することを目的とする。 In view of the above circumstances, it is an object of the present invention to provide a belt transmission device capable of suppressing the tapping sound generated in the tensioner pulley.
　本発明の実施形態に係るベルト伝動装置は、内燃機関のクランク軸に固定されたクランクプーリと、前記クランク軸と平行に設けられた補機の回転軸に固定された補機プーリと、前記クランクプーリと前記補機プーリとを含む複数のプーリに巻き掛けられたベルトと、前記補機プーリの回転軸と平行に延びる揺動軸を中心として揺動可能であって、前記ベルトの循環方向において前記補機プーリを境に一対のテンショナプーリが配置され、前記ベルトに張力を付与するベルトテンショナと、を備え、前記一対のテンショナプーリは、前記一対のテンショナプーリのいずれか一方が前記ベルトによって弾かれ難くなるように、当該いずれか一方のテンショナプーリの重さがいずれか他方のテンショナプーリの重さよりも重く設定される。 The belt transmission device according to the embodiment of the present invention includes a crank pulley fixed to a crank shaft of an internal combustion engine, an auxiliary machine pulley fixed to a rotating shaft of an auxiliary machine provided in parallel with the crank shaft, and the crank. It is possible to swing around a belt wound around a plurality of pulleys including the pulley and the auxiliary machine pulley and a swing axis extending in parallel with the rotation axis of the auxiliary machine pulley, and in the circulation direction of the belt. A pair of tensioner pulleys are arranged with the auxiliary machine pulley as a boundary, and a belt tensioner for applying tension to the belt is provided. In the pair of tensioner pulleys, one of the pair of tensioner pulleys is bulleted by the belt. The weight of one of the tensioner pulleys is set to be heavier than the weight of the other tensioner pulley so as to be difficult to crank.
　上記の構成によれば、ベルトの循環方向において補機プーリよりも下流側又は上流側のいずれか一方でベルトが急激に張っても、当該いずれか一方でテンショナプーリがベルトによって弾かれ難くなり、当該テンショナプーリに生じる打音を抑制できる。 According to the above configuration, even if the belt is suddenly stretched on either the downstream side or the upstream side of the auxiliary pulley in the circulation direction of the belt, the tensioner pulley is less likely to be flipped by the belt on either side. The tapping sound generated in the tensioner pulley can be suppressed.
　本発明の実施形態では、上記の構成において、前記いずれか一方のテンショナプーリは、前記ベルトの循環方向において前記補機プーリの下流側に配置されるテンショナプーリである。 In the embodiment of the present invention, in the above configuration, one of the tensioner pulleys is a tensioner pulley arranged on the downstream side of the auxiliary machine pulley in the circulation direction of the belt.
　ベルトの循環方向において補機プーリの下流側のベルトは、内燃機関の回転数が大きく変動する際に張りやすい。上記の構成によれば、ベルトの循環方向において補機プーリの下流側のベルトが急激に張っても、補機プーリの下流側でテンショナプーリがベルトによって弾かれ難くなり、当該テンショナプーリに生じる打音を抑制できる。 The belt on the downstream side of the auxiliary pulley in the circulation direction of the belt is easy to be stretched when the rotation speed of the internal combustion engine fluctuates greatly. According to the above configuration, even if the belt on the downstream side of the accessory pulley is suddenly stretched in the circulation direction of the belt, the tensioner pulley is less likely to be flipped by the belt on the downstream side of the accessory pulley, and the striking that occurs on the tensioner pulley. Sound can be suppressed.
　本発明の実施形態では、上記の構成において、前記補機は、前記内燃機関の始動時に電力が供給されることにより前記回転軸が駆動されるスタータである。 In the embodiment of the present invention, in the above configuration, the auxiliary machine is a starter in which the rotating shaft is driven by supplying electric power when the internal combustion engine is started.
　内燃機関の始動時に電力が供給されることにより補機（モータジェネレータ）の回転軸が駆動され、ベルトの循環方向において補機プーリ（ＭＧプーリ）の上流側のベルトが張られ下流側のベルトが緩む。その後、内燃機関の初爆によってクランク軸が回転を始め、ベルトの循環方向において補機プーリ（ＭＧプーリ）の下流側のベルトが急激に張られるため、補機プーリの下流側のテンショナプーリは弾かれやすい。また、クランクプーリの回転トルクがベルトを介して補機プーリ（ＭＧプーリ）に伝達されている状態では、ベルトの循環方向において補機プーリ（ＭＧプーリ）の下流側のベルトが張られ上流側のベルトが緩む。その後、補機（モータジェネレータ）によりクランクプーリの回転をアシストする場合は、ベルトの循環方向において補機プーリ（ＭＧプーリ）の上流側のベルトが急激に張られるため、補機プーリの上流側のテンショナプーリは弾かれやすい。すなわち、モータジェネレータを境に配置される一対のテンショナプーリは、ベルトによって弾かれやすくなっている。上記の構成によれば、モータジェネレータを境に配置される一対のテンショナプーリテンショナプーリがベルトによって弾かれ難くなり、当該テンショナプーリに生じる打音を抑制できる。 The rotation shaft of the auxiliary machine (motor generator) is driven by supplying electric power when the internal combustion engine is started, and the belt on the upstream side of the auxiliary machine pulley (MG pulley) is stretched in the circulation direction of the belt, and the belt on the downstream side is stretched. Loosen. After that, the crank shaft starts to rotate due to the initial explosion of the internal combustion engine, and the belt on the downstream side of the auxiliary pulley (MG pulley) is suddenly stretched in the circulation direction of the belt, so that the tensioner pulley on the downstream side of the auxiliary pulley is bulleted. Easy to get rid of. Further, in a state where the rotational torque of the crank pulley is transmitted to the auxiliary machine pulley (MG pulley) via the belt, the belt on the downstream side of the auxiliary machine pulley (MG pulley) is stretched in the circulation direction of the belt and is on the upstream side. The belt loosens. After that, when the rotation of the crank pulley is assisted by the auxiliary machine (motor generator), the belt on the upstream side of the auxiliary machine pulley (MG pulley) is suddenly stretched in the circulation direction of the belt, so that the belt on the upstream side of the auxiliary machine pulley is stretched. The tensioner pulley is easy to flip. That is, the pair of tensioner pulleys arranged with the motor generator as a boundary are easily flipped by the belt. According to the above configuration, the pair of tensioner pulleys tensioner pulleys arranged with the motor generator as a boundary are less likely to be flipped by the belt, and the tapping sound generated in the tensioner pulley can be suppressed.
　本発明の実施形態では、上記の構成において、前記ベルトの循環方向において前記補機プーリの下流側に配置されるテンショナプーリが前記ベルトから弾かれ難くなるように、前記下流側に配置されるテンショナプーリの重さが前記ベルトの循環方向において前記補機プーリの上流側に配置されるテンショナプーリの重さよりも重く設定される。 In the embodiment of the present invention, in the above configuration, the tensioner arranged on the downstream side of the accessory pulley in the circulation direction of the belt is arranged so that the tensioner pulley is less likely to be repelled by the belt. The weight of the pulley is set to be heavier than the weight of the tensioner pulley arranged on the upstream side of the accessory pulley in the circulation direction of the belt.
　上記の構成によれば、内燃機関の初爆によりベルトの循環方向において補機プーリの下流側のベルトが急激に張っても、ベルトの循環方向において補機プーリの下流側のテンショナプーリがベルトによって弾かれ難くなり、当該下流側のテンショナプーリに生じる打音を抑制できる。 According to the above configuration, even if the belt on the downstream side of the auxiliary pulley is suddenly stretched in the circulation direction of the belt due to the initial explosion of the internal combustion engine, the tensioner pulley on the downstream side of the auxiliary pulley is pulled by the belt in the circulation direction of the belt. It becomes difficult to be repelled, and the tapping sound generated in the tensioner pulley on the downstream side can be suppressed.
　本発明の実施形態では、上記の構成において、前記複数のプーリは、前記ベルトの循環方向において前記補機プーリの上流側に設けられた上流側プーリと、前記補機プーリの下流側に設けられた下流側プーリと、をさらに含み、前記補機プーリから前記下流側プーリまでの前記ベルトの長さは、前記上流側プーリから前記補機プーリまでの前記ベルトの長さよりも長く、前記いずれか一方のテンショナプーリは、前記補機プーリから前記下流側プーリまでの間に配置される。 In the embodiment of the present invention, in the above configuration, the plurality of pulleys are provided on the upstream side pulley provided on the upstream side of the auxiliary machine pulley and on the downstream side of the auxiliary machine pulley in the circulation direction of the belt. The length of the belt from the auxiliary pulley to the downstream pulley is longer than the length of the belt from the upstream pulley to the auxiliary pulley, and any of the above. One tensioner pulley is arranged between the auxiliary machine pulley and the downstream pulley.
　上記の構成によれば、補機プーリから下流側プーリまでのベルトの長さは、上流側プーリから補機プーリまでのベルトの長さよりも長いので、ベルトの循環方向において補機プーリよりも下流側に配置されたテンショナプーリのほうが上流側のテンショナプーリよりも弾かれ易い。これにより、いずれか他方のテンショナプーリの重さよりも重さが重いいずれか一方のテンショナプーリを補機プーリから下流側プーリまでの間に配置されたので、テンショナプーリが弾かれ難くなり、当該テンショナプーリに生じる打音を抑制できる。 According to the above configuration, the length of the belt from the auxiliary pulley to the downstream pulley is longer than the length of the belt from the upstream pulley to the auxiliary pulley, so that it is downstream of the auxiliary pulley in the circulation direction of the belt. The tensioner pulley arranged on the side is easier to be flipped than the tensioner pulley on the upstream side. As a result, one of the tensioner pulleys, which is heavier than the weight of the other tensioner pulley, is placed between the auxiliary pulley and the downstream pulley, so that the tensioner pulley is less likely to be flipped and the tensioner is not easily flipped. The tapping sound generated in the pulley can be suppressed.
　本発明の実施形態では、上記の構成において、前記ベルトテンショナは、前記一対のテンショナプーリがそれぞれ支持される第１アーム及び第２アームと、前記内燃機関に固定され、前記第１アーム及び第２アームがそれぞれ回転可能に支持されるハウジングと、を含み、前記一対のテンショナプーリは、それぞれ、プーリ本体と、前記プーリ本体を前記第１アーム又は前記第２アームに取り付ける締結部材と、前記プーリ本体と前記締結部材との間に設けられるスペーサと、を有し、前記いずれか一方のテンショナプーリの重さが前記いずれか他方のテンショナプーリの重さよりも重くなるように、前記いずれか一方のテンショナプーリの前記スペーサの厚みを前記いずれか他方のテンショナプーリの前記スペーサの厚みよりも厚く設定する。 In the embodiment of the present invention, in the above configuration, the belt tensioner is fixed to the internal combustion engine, the first arm and the second arm on which the pair of tensioner pulleys are supported, respectively, and the first arm and the second arm. Each of the pair of tensioner pulleys includes a housing in which the arms are rotatably supported, a pulley body, a fastening member for attaching the pulley body to the first arm or the second arm, and the pulley body, respectively. The one of the tensioners has a spacer provided between the and the fastening member, and the weight of the one of the tensioner pulleys is heavier than the weight of the tensioner pulley of the other of the above. The thickness of the spacer of the pulley is set to be thicker than the thickness of the spacer of any one of the tensioner pulleys.
　上記の構成によれば、いずれか一方のテンショナプーリのスペーサの厚みをいずれか他方のテンショナプーリのスペーサの厚みよりも厚くするだけで、いずれか一方のテンショナプーリの重さがいずれか他方のテンショナプーリの重さよりも重くすることができるため、プーリ本体の重さをそれぞれ変更する必要がなく、部品を共用化できる。 According to the above configuration, only the thickness of the spacer of one of the tensioner pulleys is made thicker than the thickness of the spacer of either of the other tensioner pulleys, and the weight of either of the tensioner pulleys is the weight of either of the other tensioners. Since it can be heavier than the weight of the pulley, it is not necessary to change the weight of the pulley body, and parts can be shared.
　本発明の実施形態によれば、内燃機関の初爆等によりベルトが急激に張っても一対のテンショナプーリのいずれか一方がベルトによって弾かれ難くなり、当該いずれか一方のテンショナプーリに生じる打音を抑制できる。 According to the embodiment of the present invention, even if the belt is suddenly stretched due to the initial explosion of an internal combustion engine or the like, it becomes difficult for one of the pair of tensioner pulleys to be flipped by the belt, and the tapping sound generated in the one of the tensioner pulleys. Can be suppressed.
本発明の実施形態に係るベルト伝動装置を概略的に示す正面図である。It is a front view schematically showing the belt transmission device which concerns on embodiment of this invention. 本発明の実施形態に係るベルトテンショナを内燃機関側から視た斜視図である。It is a perspective view which looked at the belt tensioner which concerns on embodiment of this invention from the internal combustion engine side. 図２に示したベルトテンショナを内燃機関側から視た正面図である。FIG. 3 is a front view of the belt tensioner shown in FIG. 2 as viewed from the internal combustion engine side. 図２に示したハウジングとアーム組立体とを示す分解斜視図である。It is an exploded perspective view which shows the housing and an arm assembly shown in FIG. 図４に示したアーム組立体の分解斜視図である。It is an exploded perspective view of the arm assembly shown in FIG. 図３に示したテンショナプーリの構造を示すＶＩ－ＶＩ線断面図である。FIG. 3 is a sectional view taken along line VI-VI showing the structure of the tensioner pulley shown in FIG. 図３に示したテンショナプーリの構造を示すＶＩＩ－ＶＩＩ線断面図である。FIG. 3 is a sectional view taken along line VII-VII showing the structure of the tensioner pulley shown in FIG.
　以下、添付図面を参照して本発明の実施形態について説明する。ただし、実施形態として記載されている又は図面に示されている構成部品の寸法、材質、形状、その相対的配置等は、本発明の範囲をこれに限定する趣旨ではなく、単なる説明例にすぎない。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, but are merely explanatory examples. do not have.
　図１は、本発明の実施形態に係るベルト伝動装置１を概略的に示す正面図である。図２は、本発明の実施形態に係るベルトテンショナ５を内燃機関２１側から視た斜視図であり、図３は、図２に示したベルトテンショナ５を内燃機関２１側から視た正面図である。図４は、図２に示したアーム組立体５４とハウジング５７とを示す分解斜視図であり、図５は、図４に示したアーム組立体５４の分解斜視図である。図６は、図３に示したテンショナプーリ５１の構造を示すＶＩ－ＶＩ線断面図であり、図７は、図３に示したテンショナプーリ５２の構造を示すＶＩＩ－ＶＩＩ線断面図である。 FIG. 1 is a front view schematically showing a belt transmission device 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the belt tensioner 5 according to the embodiment of the present invention as viewed from the internal combustion engine 21 side, and FIG. 3 is a front view of the belt tensioner 5 shown in FIG. 2 as viewed from the internal combustion engine 21 side. be. FIG. 4 is an exploded perspective view showing the arm assembly 54 and the housing 57 shown in FIG. 2, and FIG. 5 is an exploded perspective view of the arm assembly 54 shown in FIG. 6 is a VI-VI line sectional view showing the structure of the tensioner pulley 51 shown in FIG. 3, and FIG. 7 is a VII-VII line sectional view showing the structure of the tensioner pulley 52 shown in FIG.
　図１に示すように、本発明の実施形態に係るベルト伝動装置１は、クランクプーリ２、補機プーリ３、ベルト４及びベルトテンショナ５を備える。 As shown in FIG. 1, the belt transmission device 1 according to the embodiment of the present invention includes a crank pulley 2, an auxiliary machine pulley 3, a belt 4, and a belt tensioner 5.
　クランクプーリ２は、内燃機関２１のクランク軸２１１に固定されたプーリである。クランク軸２１１は、内燃機関２１の主軸であり、内燃機関２１の下方域略中央に配置されている。クランクプーリ２は、クランク軸２１１の回転によって回転する。内燃機関２１の始動時には、クランクプーリ２の回転によってクランク軸２１１が回転し、内燃機関２１の運転時には、クランク軸２１１の回転によってクランクプーリ２が回転する。 The crank pulley 2 is a pulley fixed to the crank shaft 211 of the internal combustion engine 21. The crank shaft 211 is the main shaft of the internal combustion engine 21, and is arranged substantially in the center of the lower region of the internal combustion engine 21. The crank pulley 2 is rotated by the rotation of the crank shaft 211. When the internal combustion engine 21 is started, the crank shaft 211 is rotated by the rotation of the crank pulley 2, and when the internal combustion engine 21 is operated, the crank pulley 2 is rotated by the rotation of the crank shaft 211.
　補機プーリ３は、内燃機関２１のクランク軸２１１と平行に設けられた補機３１の回転軸３１１に固定されたプーリである。補機３１は、内燃機関２１によって駆動される機器である。補機３１は、例えば、モータジェネレータ３１Ａであるが、これに限られるものではなく、ウォータポンプ（図示せず）又はエアコン用のコンプレッサ３１Ｃなどであってもよい。 The auxiliary machine pulley 3 is a pulley fixed to the rotating shaft 311 of the auxiliary machine 31 provided in parallel with the crank shaft 211 of the internal combustion engine 21. The auxiliary machine 31 is a device driven by the internal combustion engine 21. The auxiliary machine 31 is, for example, a motor generator 31A, but is not limited to this, and may be a water pump (not shown), a compressor 31C for an air conditioner, or the like.
　ベルト４は、クランクプーリ２と補機プーリ３とを含む複数のプーリに巻き掛けられている。複数のプーリは、クランクプーリ２、補機プーリ３のほか、例えば、ウォータポンプの回転軸３１１Ｂに設けられたウォータポンププーリ３Ｂ、エアコン用のコンプレッサ３１Ｃの回転軸３１１Ｃに設けられたエアコンプーリ３Ｃ、又はアイドラプーリ６である。しかしながら、複数のプーリは、これらのプーリ全てを含む必要はなく、少なくともクランクプーリ２と補機プーリ３を有するものであればよい。また、図１に示すように、エアコンプーリ３Ｃとクランクプーリ２との間に張力を付与するアイドラプーリ７を設けてもよい。このように、ベルト４がクランクプーリ２と補機プーリ３とを含む複数のプーリに巻き掛けられていることによって、クランクプーリ２の回転トルクがベルト４を介して補機プーリ３に伝達され、補機プーリ３の回転トルクがベルト４を介してクランクプーリ２に伝達される。 The belt 4 is wound around a plurality of pulleys including the crank pulley 2 and the auxiliary machine pulley 3. In addition to the crank pulley 2 and the auxiliary pulley 3, the plurality of pulleys include, for example, a water pump pulley 3B provided on the rotary shaft 311B of the water pump, and an air conditioner pulley 3C provided on the rotary shaft 311C of the compressor 31C for the air conditioner. Or the idler pulley 6. However, the plurality of pulleys need not include all of these pulleys, and may have at least a crank pulley 2 and an auxiliary pulley 3. Further, as shown in FIG. 1, an idler pulley 7 for applying tension may be provided between the air conditioner pulley 3C and the crank pulley 2. By winding the belt 4 around a plurality of pulleys including the crank pulley 2 and the auxiliary pulley 3, the rotational torque of the crank pulley 2 is transmitted to the auxiliary pulley 3 via the belt 4. The rotational torque of the auxiliary machine pulley 3 is transmitted to the crank pulley 2 via the belt 4.
　ベルトテンショナ５は、補機プーリ３の回転軸３１１と平行な軸を中心として揺動可能であって、ベルト４の循環方向において補機プーリ３を境に一対のテンショナプーリ５１，５２が配置され、ベルト４に張力を付与する。ベルトテンショナ５の一対のテンショナプーリ５１，５２は、個別に揺動可能である。図２及び図３に示すように、一対のテンショナプーリ５１，５２の間には、一対のテンショナプーリ５１，５２を相互に繋ぐ板状のスプリング５３が設けられている。よって、ベルト４の循環方向において補機プーリ３を境に一方のベルト４が張り他方のベルト４が弛むと、張った方のベルト４が一方のテンショナプーリ５１（５２）を押し上げるとともに他方のテンショナプーリ５２（５１）を押し下げて、弛んだ方のベルト４の弛みを取り除く。本実施形態では、一対のテンショナプーリ５１，５２は、その中心がベルトテンショナ５の揺動軸を通る鉛直方向に延びた線を挟むように設けられる。 The belt tensioner 5 can swing around an axis parallel to the rotation shaft 311 of the auxiliary machine pulley 3, and a pair of tensioner pulleys 51 and 52 are arranged with the auxiliary machine pulley 3 as a boundary in the circulation direction of the belt 4. , Apply tension to the belt 4. The pair of tensioner pulleys 51 and 52 of the belt tensioner 5 can swing individually. As shown in FIGS. 2 and 3, a plate-shaped spring 53 for connecting the pair of tensioner pulleys 51 and 52 to each other is provided between the pair of tensioner pulleys 51 and 52. Therefore, when one belt 4 is stretched with the auxiliary pulley 3 as a boundary and the other belt 4 is loosened in the circulation direction of the belt 4, the stretched belt 4 pushes up one tensioner pulley 51 (52) and the other tensioner. Push down the pulley 52 (51) to remove the slack in the loosened belt 4. In the present embodiment, the pair of tensioner pulleys 51 and 52 are provided so that their centers sandwich a line extending in the vertical direction passing through the swing axis of the belt tensioner 5.
　本発明の実施形態に係るベルトテンショナ５では、一対のテンショナプーリ５１，５２は、一対のテンショナプーリ５１，５２のいずれか一方がベルト４によって弾かれ難くなるように、いずれか一方のテンショナプーリ５１（５２）の重さをいずれか他方のテンショナプーリ５２（５１）の重さより重くする。 In the belt tensioner 5 according to the embodiment of the present invention, the pair of tensioner pulleys 51 and 52 is one of the tensioner pulleys 51 so that one of the pair of tensioner pulleys 51 and 52 is less likely to be flipped by the belt 4. The weight of (52) is made heavier than the weight of either tensioner pulley 52 (51).
　これにより、一方のテンショナプーリ５１（５２）は、重さが重いため、ベルト４によって弾かれ難くなり、弾かれた後にベルト４側に戻りベルト４に衝突した際に生じる打音を抑制できる。また、他方のテンショナプーリ５２（５１）は、ベルトテンショナ５全体が一方のテンショナプーリ５１（５２）が下方に移動する方向に揺動しようとするため、他方のテンショナプーリ５２（５１）が弾かれた際にベルト４側に戻ろうとする力が弱まり、ベルト４に衝突した際に生じる打音を抑制できる。このように、一方のテンショナプーリ５１（５２）がベルト４によって弾かれ難くなるように、一対のテンショナプーリ５１、５２の重さを異ならせることにより、テンショナプーリ５１、５２がベルト４に衝突した際に生じる打音を抑制することができる。なお、このとき、重さを重くした一方のテンショナプーリ５１（５２）の方が、他方のテンショナプーリ５２（５１）に比べ打音抑制効果が高くなる。 As a result, one of the tensioner pulleys 51 (52) is heavy, so that it is difficult to be repelled by the belt 4, and it is possible to suppress the tapping sound generated when the tensioner pulley 51 (52) returns to the belt 4 side and collides with the belt 4 after being repelled. Further, in the other tensioner pulley 52 (51), the entire belt tensioner 5 tends to swing in the direction in which one tensioner pulley 51 (52) moves downward, so that the other tensioner pulley 52 (51) is flipped. At that time, the force to return to the belt 4 side is weakened, and the tapping sound generated when the belt 4 collides with the belt 4 can be suppressed. In this way, the tensioner pulleys 51 and 52 collided with the belt 4 by making the weights of the pair of tensioner pulleys 51 and 52 different so that one of the tensioner pulleys 51 (52) is less likely to be flipped by the belt 4. It is possible to suppress the tapping sound generated at that time. At this time, the one tensioner pulley 51 (52) having a heavier weight has a higher tapping sound suppressing effect than the other tensioner pulley 52 (51).
　そのため、例えば、ベルト４の循環方向において補機プーリ３よりも下流側のベルト４が急激に張ることでベルト４の循環方向において補機プーリ３よりも下流側に配置されたテンショナプーリ５１に生じる打音が顕著な場合には、当該下流側に配置されたテンショナプーリ５１がベルト４によって弾かれ難くなるように、当該下流側に配置されたテンショナプーリ５１の重さを補機プーリ３よりも上流側に配置されたテンショナプーリ５２の重さよりも重くすることが好ましい。補機プーリ３よりも下流側に配置されたテンショナプーリ５１の重さは、上流側に配置されたテンショナプーリ５２の重さよりも例えば９０ｇ程度重くする。 Therefore, for example, the belt 4 on the downstream side of the auxiliary pulley 3 is suddenly stretched in the circulation direction of the belt 4, so that the tensioner pulley 51 is arranged on the downstream side of the auxiliary pulley 3 in the circulation direction of the belt 4. When the tapping sound is remarkable, the weight of the tensioner pulley 51 arranged on the downstream side is heavier than that of the auxiliary pulley 3 so that the tensioner pulley 51 arranged on the downstream side is less likely to be flipped by the belt 4. It is preferable that the weight is heavier than the weight of the tensioner pulley 52 arranged on the upstream side. The weight of the tensioner pulley 51 arranged on the downstream side of the auxiliary machine pulley 3 is, for example, about 90 g heavier than the weight of the tensioner pulley 52 arranged on the upstream side.
　また、例えば、ベルト４の循環方向において補機プーリ３よりも上流側のベルト４が急激に張ることでベルト４の循環方向において補機プーリ３よりも上流側に配置されたテンショナプーリ５２に生じる打音が顕著な場合には、当該上流側に配置されたテンショナプーリ５２がベルト４によって弾かれ難くなるように、当該上流側に配置されたテンショナプーリ５２の重さを補機プーリ３よりも下流側に配置されたテンショナプーリ５１の重さよりも重くすることが好ましい。補機プーリ３よりも上流側に配置されたテンショナプーリ５２の重さは、下流側に配置されたテンショナプーリ５１の重さよりも例えば９０ｇ程度重くする。 Further, for example, the belt 4 on the upstream side of the auxiliary pulley 3 is suddenly stretched in the circulation direction of the belt 4, so that the tensioner pulley 52 is arranged on the upstream side of the auxiliary pulley 3 in the circulation direction of the belt 4. When the tapping sound is remarkable, the weight of the tensioner pulley 52 arranged on the upstream side is heavier than that of the auxiliary pulley 3 so that the tensioner pulley 52 arranged on the upstream side is less likely to be flipped by the belt 4. It is preferable that the weight is heavier than the weight of the tensioner pulley 51 arranged on the downstream side. The weight of the tensioner pulley 52 arranged on the upstream side of the auxiliary machine pulley 3 is, for example, about 90 g heavier than the weight of the tensioner pulley 51 arranged on the downstream side.
　本発明の実施形態に係るベルト伝動装置１では、上述したいずれか一方のテンショナプーリ５１（５２）は、ベルト４の循環方向において補機プーリ３の下流側に配置されるテンショナプーリ５１である。上述したいずれか一方のテンショナプーリ５１（５２）は、他方のテンショナプーリ５２（５１）の重さよりも重いプーリであり、本発明の実施形態係るベルト伝動装置１では、ベルト４の循環方向において補機プーリ３の下流側に配置されたテンショナプーリ５１がベルト４によって弾かれ難くなるように、補機プーリ３の下流側に配置されたテンショナプーリ５１の重さが上流側に配置されたテンショナプーリ５２の重さよりも重く設定される。 In the belt transmission device 1 according to the embodiment of the present invention, one of the above-mentioned tensioner pulleys 51 (52) is a tensioner pulley 51 arranged on the downstream side of the auxiliary pulley 3 in the circulation direction of the belt 4. One of the tensioner pulleys 51 (52) described above is a pulley heavier than the weight of the other tensioner pulley 52 (51), and in the belt transmission device 1 according to the embodiment of the present invention, the tensioner pulley 51 (52) supplements in the circulation direction of the belt 4. The weight of the tensioner pulley 51 arranged on the downstream side of the auxiliary machine pulley 3 is arranged on the upstream side so that the tensioner pulley 51 arranged on the downstream side of the machine pulley 3 is less likely to be flipped by the belt 4. It is set heavier than the weight of 52.
　補機プーリ３の下流側は、内燃機関２１の始動時など、内燃機関２１の回転数が大きく変動する際にベルト４が張るため、補機プーリ３の下流側に配置されたテンショナプーリ５１はベルト４によって弾かれ易い。上述した本発明の実施形態に係るベルト伝動装置１によれば、ベルト４の循環方向において補機プーリ３の下流側のベルト４が急激に張っても、補機プーリ３の下流側でテンショナプーリ５１がベルト４によって弾かれ難くなり、当該テンショナプーリ５１に生じる打音を抑制できる。 Since the belt 4 is stretched on the downstream side of the auxiliary machine pulley 3 when the rotation speed of the internal combustion engine 21 fluctuates greatly, such as when the internal combustion engine 21 is started, the tensioner pulley 51 arranged on the downstream side of the auxiliary machine pulley 3 is used. Easy to be flipped by the belt 4. According to the belt transmission device 1 according to the embodiment of the present invention described above, even if the belt 4 on the downstream side of the auxiliary pulley 3 is suddenly stretched in the circulation direction of the belt 4, the tensioner pulley is on the downstream side of the auxiliary pulley 3. The 51 is less likely to be flipped by the belt 4, and the tapping sound generated in the tensioner pulley 51 can be suppressed.
　本発明の実施形態に係るベルト伝動装置１では、補機３１は、モータジェネレータ３１Ａである。モータジェネレータ３１Ａは、内燃機関２１の始動時に電力が供給されることにより回転軸３１１Ａが駆動され、回転軸３１１Ａに固定されたモータジェネレータプーリ３Ａ（以下「ＭＧプーリ３Ａ」という）の回転トルクがベルト４を介してクランクプーリ２に伝達されることで、クランクプーリ２が固定されたクランク軸２１１を回転させる（クランキング）ことが可能なスタータとして機能する。また、モータジェネレータ３１Ａは、クランクプーリ２の回転トルクがベルト４を介してＭＧプーリ３Ａに伝達されることで回転軸３１１Ａが回転され発電することが可能な発電機としても機能する。なお、モータジェネレータ３１Ａは、内燃機関２１の運転中に電力が供給されることにより、クランクプーリ２（すなわちクランク軸２１１）の回転をアシストする機能を有していてもよい。 In the belt transmission device 1 according to the embodiment of the present invention, the auxiliary machine 31 is a motor generator 31A. In the motor generator 31A, the rotary shaft 311A is driven by supplying power when the internal combustion engine 21 is started, and the rotary torque of the motor generator pulley 3A (hereinafter referred to as "MG pulley 3A") fixed to the rotary shaft 311A is a belt. By being transmitted to the crank pulley 2 via 4, it functions as a starter capable of rotating (cranking) the crank shaft 211 to which the crank pulley 2 is fixed. Further, the motor generator 31A also functions as a generator capable of rotating the rotation shaft 311A and generating electricity by transmitting the rotational torque of the crank pulley 2 to the MG pulley 3A via the belt 4. The motor generator 31A may have a function of assisting the rotation of the crank pulley 2 (that is, the crank shaft 211) by supplying electric power during the operation of the internal combustion engine 21.
　内燃機関２１の始動時に電力が供給されることによりモータジェネレータ３１Ａの回転軸３１１Ａが駆動され、ベルト４の循環方向においてＭＧプーリ３Ａの下流側のベルト４が緩む。その後、内燃機関２１の初爆によってクランク軸２１１が回転を始め、ベルト４の循環方向においてＭＧプーリ３Ａの下流側のベルト４が急激に張られるため、ＭＧプーリ３Ａの下流側のテンショナプーリ５１が弾かれ易くなっている。このように、スタータとして機能するモータジェネレータ３１Ａの、ベルト４の循環方向において下流側に位置するテンショナプーリ５１は、ベルト４により弾かれ易い。上述した本発明の実施形態に係るベルト伝動装置１によれば、このような構成でもテンショナプーリ５１、５２がベルト４に衝突した際に生じる打音を抑制することができる。なお、モータジェネレータ３１Ａがクランクプーリ２の回転をアシストする機能を有している場合は、アシスト開始前はベルト４の循環方向においてＭＧプーリ３Ａの上流側のベルト４が緩み、アシスト開始時にはベルト４の循環方向においてＭＧプーリ３Ａの上流側のベルト４が張られるため、モータジェネレータ３１Ａの、ベルト４の循環方向において上流側に位置するテンショナプーリ５２がベルト４により弾かれ易くなる。このような場合にも上述した本発明の実施形態に係るベルト伝動装置１によりテンショナプーリ５１、５２がベルト４に衝突した際に生じる打音を抑制することができる。 By supplying electric power when the internal combustion engine 21 is started, the rotating shaft 311A of the motor generator 31A is driven, and the belt 4 on the downstream side of the MG pulley 3A loosens in the circulation direction of the belt 4. After that, the crank shaft 211 starts to rotate due to the initial explosion of the internal combustion engine 21, and the belt 4 on the downstream side of the MG pulley 3A is suddenly stretched in the circulation direction of the belt 4, so that the tensioner pulley 51 on the downstream side of the MG pulley 3A becomes It is easy to be played. As described above, the tensioner pulley 51 located on the downstream side in the circulation direction of the belt 4 of the motor generator 31A functioning as a starter is easily flipped by the belt 4. According to the belt transmission device 1 according to the embodiment of the present invention described above, it is possible to suppress the tapping sound generated when the tensioner pulleys 51 and 52 collide with the belt 4 even with such a configuration. If the motor generator 31A has a function of assisting the rotation of the crank pulley 2, the belt 4 on the upstream side of the MG pulley 3A loosens in the circulation direction of the belt 4 before the assist starts, and the belt 4 at the start of the assist. Since the belt 4 on the upstream side of the MG pulley 3A is stretched in the circulation direction of the above, the tensioner pulley 52 located on the upstream side in the circulation direction of the belt 4 of the motor generator 31A is easily flipped by the belt 4. Even in such a case, the belt transmission device 1 according to the embodiment of the present invention described above can suppress the tapping sound generated when the tensioner pulleys 51 and 52 collide with the belt 4.
　本発明の実施形態に係るベルト伝動装置１では、内燃機関２１の初爆時に、ベルト４の循環方向においてＭＧプーリ３Ａの下流側に配置されるテンショナプーリ５１（以下「力行側テンショナプーリ５１」という）がベルト４から弾かれ難くなるように、力行側テンショナプーリ５１の重さをベルト４の循環方向において補機プーリ３の上流側に配置されるテンショナプーリ５２（以下「回生側テンショナプーリ５２」という）の重さよりも重くする。 In the belt transmission device 1 according to the embodiment of the present invention, the tensioner pulley 51 (hereinafter referred to as “power running side tensioner pulley 51”) is arranged on the downstream side of the MG pulley 3A in the circulation direction of the belt 4 at the time of the initial explosion of the internal combustion engine 21. ) Is arranged on the upstream side of the auxiliary pulley 3 in the circulation direction of the belt 4 so that the weight of the tensioner pulley 51 on the power running side is less likely to be repelled by the belt 4 (hereinafter, “regeneration side tensioner pulley 52””. Make it heavier than the weight of).
　上述した本発明の実施形態に係るベルト伝動装置１によれば、内燃機関２１の初爆によりベルト４の循環方向においてＭＧプーリ３Ａの下流側のプーリが急激に張っても、力行側テンショナプーリ５１が弾かれ難くなり、当該力行側テンショナプーリ５１に生じる打音を抑制できる。内燃機関２１始動時は、内燃機関２１運転中に比べ内燃機関２１に発生する音が小さくテンショナプーリ５１、５２がベルト４に衝突した際に生じる打音が目立つため、内燃機関２１始動時に弾かれ易い力行側テンショナプーリ５１を重くすることが好ましい。 According to the belt transmission device 1 according to the embodiment of the present invention described above, even if the pulley on the downstream side of the MG pulley 3A is suddenly stretched in the circulation direction of the belt 4 due to the initial explosion of the internal combustion engine 21, the tensioner pulley 51 on the power running side Is less likely to be flipped, and the tapping sound generated on the tensioner pulley 51 on the power running side can be suppressed. When the internal combustion engine 21 is started, the noise generated in the internal combustion engine 21 is smaller than that during the operation of the internal combustion engine 21, and the tapping sound generated when the tensioner pulleys 51 and 52 collide with the belt 4 is conspicuous. It is preferable to make the tensioner pulley 51 on the easy force running side heavier.
　本発明の実施形態に係るベルト伝動装置１では、複数のプーリは、ベルト４の循環方向において補機プーリ３の上流側に設けられた上流側プーリ８と、補機プーリ３の下流側に設けられた下流側プーリ９と、を更に含む。例えば、補機プーリ３の上流側に設けられた上流側プーリ８は、アイドラプーリ６であり、補機プーリ３の下流側に設けられた下流側プーリ９は、エアコンプーリ３Ｃである。 In the belt transmission device 1 according to the embodiment of the present invention, the plurality of pulleys are provided on the upstream side pulley 8 provided on the upstream side of the auxiliary machine pulley 3 in the circulation direction of the belt 4 and on the downstream side of the auxiliary machine pulley 3. Further includes the downstream pulley 9 provided. For example, the upstream pulley 8 provided on the upstream side of the auxiliary pulley 3 is an idler pulley 6, and the downstream pulley 9 provided on the downstream side of the auxiliary pulley 3 is an air conditioner pulley 3C.
　そして、補機プーリ３から下流側プーリ９までのベルト４の長さは、上流側プーリ８から補機プーリ３までのベルト４の長さよりも長く、いずれか他方のテンショナプーリ５２（５１）の重さよりも重いいずれか一方のテンショナプーリ５１（５２）は、補機プーリ３から下流側プーリ９までの間に配置する。例えば、補機プーリ３がＭＧプーリ３Ａ、下流側プーリ９がエアコンプーリ３Ｃ、上流側プーリ８がアイドラプーリ６である場合に、ＭＧプーリ３Ａからエアコンプーリ３Ｃまでのベルト４の長さは、アイドラプーリ６からＭＧプーリ３Ａまでのベルト４の長さよりも長く、回生側テンショナプーリ５２よりも重い力行側テンショナプーリ５１は、ＭＧプーリ３Ａからエアコンプーリ３Ｃまでの間に配置する。 The length of the belt 4 from the auxiliary pulley 3 to the downstream pulley 9 is longer than the length of the belt 4 from the upstream pulley 8 to the auxiliary pulley 3, and the length of the tensioner pulley 52 (51) of either one is longer. One of the tensioner pulleys 51 (52), which is heavier than the weight, is arranged between the auxiliary machine pulley 3 and the downstream pulley 9. For example, when the auxiliary pulley 3 is the MG pulley 3A, the downstream pulley 9 is the air conditioner pulley 3C, and the upstream pulley 8 is the idler pulley 6, the length of the belt 4 from the MG pulley 3A to the air conditioner pulley 3C is the idler. The power running side tensioner pulley 51, which is longer than the length of the belt 4 from the pulley 6 to the MG pulley 3A and heavier than the regenerative side tensioner pulley 52, is arranged between the MG pulley 3A and the air conditioner pulley 3C.
　上述した本発明の実施形態に係るベルト伝動装置１によれば、補機プーリ３から下流側プーリ９までのベルト４の長さは、上流側プーリ８から補機プーリ３までのベルト４の長さよりも長いので、ベルト４の循環方向において補機プーリ３よりも下流側に配置されたテンショナプーリ５１のほうが上流側のテンショナプーリ５２よりも弾かれ易い。いずれか他方のテンショナプーリ５２よりも重いいずれか一方のテンショナプーリ５１を補機プーリ３から下流側プーリ９までの間に配置したので、テンショナプーリ５１は弾かれ難くなり、当該テンショナプーリ５１に生じる打音を抑制できる。 According to the belt transmission device 1 according to the embodiment of the present invention described above, the length of the belt 4 from the auxiliary pulley 3 to the downstream pulley 9 is the length of the belt 4 from the upstream pulley 8 to the auxiliary pulley 3. Since it is longer than that, the tensioner pulley 51 arranged on the downstream side of the auxiliary pulley 3 in the circulation direction of the belt 4 is more likely to be flipped than the tensioner pulley 52 on the upstream side. Since one of the tensioner pulleys 51, which is heavier than the other tensioner pulley 52, is arranged between the auxiliary pulley 3 and the downstream pulley 9, the tensioner pulley 51 becomes difficult to be flipped and occurs in the tensioner pulley 51. The tapping sound can be suppressed.
　図４に示すように、本発明の実施形態に係るベルトテンショナ５は、第１アーム５５及び第２アーム５６と、ハウジング５７と、を含む。第１アーム５５及び第２アーム５６は、上述した一対のテンショナプーリ５１，５２がそれぞれ支持される部品である。第１アーム５５と第２アーム５６は、組み合わされて一つのアーム組立体５４を構成し、図５に示すように、相互に独立して揺動可能である。ハウジング５７は、補機３１（モータジェネレータ３１Ａ）に固定され、第１アーム５５及び第２アーム５６がそれぞれ揺動可能に支持される。 As shown in FIG. 4, the belt tensioner 5 according to the embodiment of the present invention includes a first arm 55, a second arm 56, and a housing 57. The first arm 55 and the second arm 56 are components on which the pair of tensioner pulleys 51 and 52 described above are supported, respectively. The first arm 55 and the second arm 56 are combined to form one arm assembly 54, and as shown in FIG. 5, they can swing independently of each other. The housing 57 is fixed to the auxiliary machine 31 (motor generator 31A), and the first arm 55 and the second arm 56 are supported so as to be swingable.
　図６及び図７に示すように、一対のテンショナプーリ５１，５２は、それぞれ、プーリ本体５１１，５２１、ボルト５１２，５２２及びスペーサ５１３，５２３を有する。ボルト５１２，５２２は、プーリ本体５１１，５２１を第１アーム５５又は第２アーム５６に回転可能に取り付ける締結部材である。スペーサ５１３，５２３は、プーリ本体５１１，５２１とボルト５１２，５２２との間に設けられる。なお、図６及び図７において、第１アーム５５及び第２アーム５６の形状は簡略化して記載されている。図６及び図７に示す例では、第１アーム５５又は第２アーム５６に設けられた軸部材５５１，５６１とプーリ本体５１１，５２１との間にベアリング５１４，５２４が設けられ、該ベアリング５１４，５２４にスペーサ５１３，５２３が嵌合される。そして、該スペーサ５１３，５２３を貫通するボルト５１２，５２２によって、スペーサ５１３，５２３と軸部材５５１，５６１との間にベアリング５１４，５２４が固定される。なお、スペーサ５１３，５２３は、プーリ本体５１１，５２１とボルト５１２，５２２との間の隙間からテンショナプーリ５１，５２内に異物が入り込み、テンショナプーリ５１，５２の回転を阻害することを抑制するための部材で、例えば金属板など、両スペーサ５１３，５２３同一の材料で形成される。 As shown in FIGS. 6 and 7, the pair of tensioner pulleys 51 and 52 have a pulley body 511,521, bolts 512,522 and spacers 513,523, respectively. The bolts 512 and 522 are fastening members that rotatably attach the pulley bodies 511,521 to the first arm 55 or the second arm 56. Spacers 513 and 523 are provided between the pulley main body 511 and 521 and the bolts 512 and 522. In addition, in FIGS. 6 and 7, the shapes of the first arm 55 and the second arm 56 are simplified and described. In the example shown in FIGS. 6 and 7, bearings 514 and 524 are provided between the shaft members 551 and 561 provided on the first arm 55 or the second arm 56 and the pulley main bodies 511, 521, and the bearings 514 and 514 are provided. Spacers 513 and 523 are fitted to the 524. Then, the bearings 514 and 524 are fixed between the spacers 513 and 523 and the shaft members 551 and 561 by the bolts 512 and 522 penetrating the spacers 513 and 523. The spacers 513 and 523 are used to prevent foreign matter from entering the tensioner pulleys 51 and 52 through the gap between the pulley bodies 51 and 521 and the bolts 512 and 522, thereby hindering the rotation of the tensioner pulleys 51 and 52. The members are made of the same material for both spacers 513 and 523, for example, a metal plate.
　そして、いずれか一方のテンショナプーリ５１（５２）の重さがいずれか他方のテンショナプーリ５２（５１）の重さよりも重くなるように、いずれか一方のテンショナプーリ５１（５２）のスペーサ５１３（５２３）の厚みをいずれか他方のスペーサ５２３（５１３）の厚みよりも厚く設定する。すなわち、一対のテンショナプーリ５１，５２のうち、重くする方のテンショナプーリ５１（５２）のスペーサ５１３（５２３）の厚みを他方のテンショナプーリ５２のスペーサ５２３（５１３）の厚みよりも厚くすることで、重くする方のテンショナプーリ５１（５２）を他方のテンショナプーリ５２（５１）よりも重くする。 Then, the spacer 513 (523) of one of the tensioner pulleys 51 (52) is heavier than the weight of either of the tensioner pulleys 52 (51). ) Is set to be thicker than the thickness of either spacer 523 (513). That is, the thickness of the spacer 513 (523) of the tensioner pulley 51 (52) to be heavier among the pair of tensioner pulleys 51 and 52 is made thicker than the thickness of the spacer 523 (513) of the other tensioner pulley 52. The heavier tensioner pulley 51 (52) is made heavier than the other tensioner pulley 52 (51).
　上述した本発明の実施形態に係るベルト伝動装置１によれば、いずれか一方のテンショナプーリ５１（５２）のスペーサ５１３（５２３）の厚みをいずれか他方のテンショナプーリ５２（５１）の重さよりも重くすることで、いずれか一方のテンショナプーリ５１（５２）の重さがいずれか他方のテンショナプーリ５２の重さよりも重くすることができる。したがって、一対のプーリ本体５１１，５２１を同一の材料、形状で形成しても一対のテンショナプーリ５１，５２の重さを異ならせることができるので、各プーリ本体５１１，５２１で製法を異ならせる必要がなく、コストを削減することができる。なお、スペーサ５１３，５２３の重さを異ならせるにあたり、厚みを異ならせるのではなく材料を異ならせる等の手段をとることも可能だが、厚みを異ならせることによりどちらのスペーサ５１３，５２３が重いのかが把握し易くなるため、誤組防止にもつながる。 According to the belt transmission device 1 according to the embodiment of the present invention described above, the thickness of the spacer 513 (523) of one of the tensioner pulleys 51 (52) is larger than the weight of the other tensioner pulley 52 (51). By making it heavier, the weight of either one of the tensioner pulleys 51 (52) can be made heavier than the weight of either of the other tensioner pulleys 52. Therefore, even if the pair of pulley bodies 511,521 are formed of the same material and shape, the weights of the pair of tensioner pulleys 51, 52 can be different. Therefore, it is necessary to make the manufacturing method different for each pulley body 511,521. There is no such thing, and the cost can be reduced. In addition, when making the weights of the spacers 513 and 523 different, it is possible to take measures such as making different materials instead of making different thicknesses, but which spacers 513 and 523 are heavier by making different thicknesses? This makes it easier to understand, which also helps prevent misassembly.
　本発明は上述した実施形態に限定されることはなく、上述した実施形態に変形を加えた形態や、これらの形態を適宜組み合わせた形態も含む。 The present invention is not limited to the above-described embodiment, and includes a modification of the above-mentioned embodiment and a combination of these embodiments as appropriate.
　本出願は、２０２０年８月１１日出願の日本特許出願２０２０－１３５５１６に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on Japanese patent application 2020-135516 filed on August 11, 2020, the contents of which are incorporated herein by reference.
１　　ベルト伝動装置
２　　クランクプーリ
２１　　内燃機関
２１１　　クランク軸
３　　補機プーリ
３Ａ　　ＭＧプーリ（モータジェネレータプーリ）
３１　　補機
３１Ａ　　モータジェネレータ
３１１　　回転軸
３１１Ａ　　回転軸
３Ｂ　　ウォータポンププーリ
３１１Ｂ　　回転軸
３Ｃ　　エアコンプーリ
３１Ｃ　　エアコン用のコンプレッサ
３１１Ｃ　　回転軸
４　　ベルト
５　　ベルトテンショナ
５１　　テンショナプーリ
５１１　　プーリ本体
５１２　　ボルト
５１３　　スペーサ
５１４　　ベアリング
５２　　テンショナプーリ
５２１　　プーリ本体
５２２　　ボルト
５２３　　スペーサ
５２４　　ベアリング
５３　　スプリング
５４　　アーム組立体
５５　　第１アーム
５５１　　軸部材
５６　　第２アーム
５６１　　軸部材
５７　　ハウジング
６　　アイドラプーリ
７　　アイドラプーリ
８　　上流側プーリ
９　　下流側プーリ 1 Belt transmission device 2 Crank pulley 21 Internal combustion engine 211 Crank shaft 3 Auxiliary machine pulley 3A MG pulley (motor generator pulley)
31 Auxiliary machine 31A Motor generator 311 Rotating shaft 311A Rotating shaft 3B Water pump pulley 311B Rotating shaft 3C Air conditioner pulley 31C Air conditioner compressor 311C Rotating shaft 4 Belt 5 Belt tensioner 51 Tensioner pulley 511 Pulley body 512 Bolt 513 Spacer 514 Bearing 52 Tensioner pulley 521 Pulley body 522 Bolt 523 Spacer 524 Bearing 53 Spring 54 Arm assembly 55 First arm 551 Shaft member 56 Second arm 561 Shaft member 57 Housing 6 Idler pulley 7 Idler pulley 8 Upstream side pulley 9 Downstream side pulley

Claims (6)

  1. 　内燃機関のクランク軸に固定されたクランクプーリと、
    　前記クランク軸と平行に設けられた補機の回転軸に固定された補機プーリと、
    　前記クランクプーリと前記補機プーリとを含む複数のプーリに巻き掛けられるベルトと、
    　前記補機プーリの回転軸と平行に延びる揺動軸を中心として揺動可能であって、前記ベルトの循環方向において前記補機プーリを境に一対のテンショナプーリが配置され、前記ベルトに張力を付与するベルトテンショナと、
    　を備え、
    　前記一対のテンショナプーリは、前記一対のテンショナプーリのいずれか一方が前記ベルトによって弾かれ難くなるように、当該いずれか一方のテンショナプーリの重さがいずれか他方のテンショナプーリの重さよりも重く設定される、
    　ベルト伝動装置。     A crank pulley fixed to the crank shaft of an internal combustion engine,
    An auxiliary machine pulley fixed to the rotating shaft of the auxiliary machine provided in parallel with the crank shaft, and
    A belt wound around a plurality of pulleys including the crank pulley and the auxiliary machine pulley,
    A pair of tensioner pulleys are arranged with the auxiliary machine pulley as a boundary in the circulation direction of the belt so as to be able to swing around the swinging shaft extending in parallel with the rotation axis of the auxiliary machine pulley, and tension is applied to the belt. The belt tensioner to be given and
    Equipped with
    The pair of tensioner pulleys is set so that the weight of one of the tensioner pulleys is heavier than the weight of the other tensioner pulley so that one of the pair of tensioner pulleys is less likely to be flipped by the belt. Be done,
    Belt transmission device.
  2. 　前記いずれか一方のテンショナプーリは、前記ベルトの循環方向において前記補機プーリの下流側に配置されるテンショナプーリである、
    　請求項１に記載のベルト伝動装置。     One of the tensioner pulleys is a tensioner pulley arranged on the downstream side of the auxiliary machine pulley in the circulation direction of the belt.
    The belt transmission device according to claim 1.
  3. 　前記補機は、前記内燃機関の始動時に電力が供給されることにより前記回転軸が駆動されるスタータである、
    　請求項１又は２に記載のベルト伝動装置。     The auxiliary machine is a starter in which the rotating shaft is driven by supplying electric power when the internal combustion engine is started.
    The belt transmission device according to claim 1 or 2.
  4. 　前記ベルトの循環方向において前記補機プーリの下流側に配置されるテンショナプーリが前記ベルトから弾かれ難くなるように、前記下流側に配置されるテンショナプーリの重さが前記ベルトの循環方向において前記補機プーリの上流側に配置されるテンショナプーリの重さよりも重く設定される、
    　請求項１から３のいずれか一項に記載のベルト伝動装置。     The weight of the tensioner pulley arranged on the downstream side is the weight of the tensioner pulley arranged on the downstream side in the circulation direction of the belt so that the tensioner pulley arranged on the downstream side of the accessory pulley is less likely to be repelled from the belt in the circulation direction of the belt. It is set heavier than the weight of the tensioner pulley located on the upstream side of the auxiliary machine pulley.
    The belt transmission device according to any one of claims 1 to 3.
  5. 　前記複数のプーリは、前記ベルトの循環方向において前記補機プーリの上流側に設けられた上流側プーリと、前記補機プーリの下流側に設けられた下流側プーリと、をさらに含み、
    　前記補機プーリから前記下流側プーリまでの前記ベルトの長さは、前記上流側プーリから前記補機プーリまでの前記ベルトの長さよりも長く、
    　前記いずれか一方のテンショナプーリは、前記補機プーリから前記下流側プーリまでの間に配置される、
    　請求項１から４のいずれか一項に記載のベルト伝動装置。     The plurality of pulleys further include an upstream pulley provided on the upstream side of the auxiliary machine pulley in the circulation direction of the belt and a downstream side pulley provided on the downstream side of the auxiliary machine pulley.
    The length of the belt from the auxiliary pulley to the downstream pulley is longer than the length of the belt from the upstream pulley to the auxiliary pulley.
    One of the tensioner pulleys is arranged between the auxiliary machine pulley and the downstream pulley.
    The belt transmission device according to any one of claims 1 to 4.
  6. 　前記ベルトテンショナは、
    　前記一対のテンショナプーリがそれぞれ支持される第１アーム及び第２アームと、
    　前記内燃機関に固定され、前記第１アーム及び第２アームがそれぞれ回転可能に支持されるハウジングと、
    　を含み、
    　前記一対のテンショナプーリは、それぞれ、
    　プーリ本体と、
    　前記プーリ本体を前記第１アーム又は前記第２アームに取り付ける締結部材と、
    　前記プーリ本体と前記締結部材との間に設けられるスペーサと、
    　を有し、
    　前記いずれか一方のテンショナプーリの重さが前記いずれか他方のテンショナプーリの重さよりも重くなるように、前記いずれか一方のテンショナプーリの前記スペーサの厚みは前記いずれか他方のテンショナプーリの前記スペーサの厚みよりも厚く設定される、
    請求項１から５のいずれか一項に記載のベルト伝動装置。     The belt tensioner is
    A first arm and a second arm on which the pair of tensioner pulleys are supported, respectively.
    A housing fixed to the internal combustion engine and rotatably supported by the first arm and the second arm, respectively.
    Including
    Each of the pair of tensioner pulleys
    With the pulley body
    With a fastening member that attaches the pulley body to the first arm or the second arm,
    A spacer provided between the pulley body and the fastening member,
    Have,
    The thickness of the spacer of either one of the tensioner pulleys is the spacer of the other tensioner pulley so that the weight of the one of the tensioner pulleys is heavier than the weight of the other of the tensioner pulleys. Is set thicker than the thickness of
    The belt transmission device according to any one of claims 1 to 5.
PCT/JP2021/028550 2020-08-11 2021-08-02 Belt transmission device WO2022034820A1 (en)

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