JP2017150620A - pulley - Google Patents

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JP2017150620A
JP2017150620A JP2016035457A JP2016035457A JP2017150620A JP 2017150620 A JP2017150620 A JP 2017150620A JP 2016035457 A JP2016035457 A JP 2016035457A JP 2016035457 A JP2016035457 A JP 2016035457A JP 2017150620 A JP2017150620 A JP 2017150620A
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pulley
cover
endless belt
engine
wall portion
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JP6734005B2 (en
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壮介 山崎
Sosuke Yamazaki
壮介 山崎
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a pulley which makes foreign objects such as water less likely to spill on a pivotally support part of a pulley body.SOLUTION: A pulley 1 includes: a pulley body 2 around which a belt (an endless belt 18) is wound and rotatably attached to an outer side of an engine 10 by a pivotally support part 3; and a cover 4 covering the pivotally support part 3 from the outside of the engine 10. The pulley body 2 has a wall part 22 which is formed so as to enclose at least a part of an outer periphery of the cover 4. The wall part 22 protrudes to the outer side of the cover 4.SELECTED DRAWING: Figure 1

Description

本発明は、エンジンの外側に配置されるプーリーに関する。特に、プーリー本体の軸支部に水などの異物がかかり難いプーリーに関する。   The present invention relates to a pulley disposed outside an engine. In particular, the present invention relates to a pulley in which foreign matter such as water is hardly applied to a shaft support portion of the pulley body.

自動車などの内燃機関の周囲には、内燃機関の動力を利用して駆動される補機、例えばウォーターポンプなどが配置される。補機の駆動は、例えば、内燃機関のクランクシャフトの先端に設けられたクランクプーリーとテンションプーリーとに掛け渡される無端ベルトと、補機に設けられるプーリーとを接触させて、無端ベルトを介して内燃機関の動力（クランクシャフトの回転力）を補機のプーリーに伝達することで行う。テンションプーリーは、無端ベルトに適正な張力を付与して、補機のプーリーに内燃機関の動力を伝達し易くする。このテンションプーリーは、アイドルプーリーが利用されることが多い。   Around an internal combustion engine such as an automobile, an auxiliary machine driven using the power of the internal combustion engine, such as a water pump, is disposed. The driving of the auxiliary machine is performed, for example, by contacting an endless belt spanned between a crank pulley and a tension pulley provided at the tip of the crankshaft of the internal combustion engine and a pulley provided in the auxiliary machine via the endless belt. This is done by transmitting the power of the internal combustion engine (the rotational force of the crankshaft) to the pulley of the auxiliary machine. The tension pulley applies appropriate tension to the endless belt to facilitate transmission of the power of the internal combustion engine to the pulley of the auxiliary machine. As this tension pulley, an idle pulley is often used.

アイドルプーリーは、エンジンの外側に取り付けられる軸部にベアリングを介して装着される。アイドルプーリーには、通常、路面から跳ね上がった水などがベアリングにかかることを防止するために、そのベアリングをエンジンの外側から覆うカバーが設けられる。しかし、アイドルプーリーにおけるカバーの外周に水滴が付着すれば、水滴がその表面を伝ってベアリングに流れる虞がある。   The idle pulley is attached to a shaft portion attached to the outside of the engine via a bearing. The idle pulley is usually provided with a cover that covers the bearing from the outside of the engine in order to prevent water splashed from the road surface from being applied to the bearing. However, if water droplets adhere to the outer periphery of the cover of the idle pulley, the water droplets may flow along the surface and flow to the bearing.

例えば、特許文献１の内燃機関用プーリーは、ベアリングを介して中心軸が嵌まる内輪と、ベルトが巻き掛けられる外輪と、内輪と外輪とを繋ぐリング状の円板部とを有し、ベアリング及び内輪の外側（エンジンと反対側）の面が中心軸に設けたカバーで覆われている。カバーは、プーリーの外側面よりも外側に位置している。プーリーの外側には、内輪と外輪と円板部とで外向き環状溝が形成されており、プーリーの内側（エンジン側）には、内輪と外輪と円板部とで内向き環状溝が形成されている。円板部の内周部（内輪側）には、外向き環状溝と内向き環状溝とに連通する連通穴が形成されている。内向き環状溝には、プーリーの回転時に内向き環状溝側から連通穴を通って外向き環状溝側に向かって空気を噴出させる内リブが設けられている。円板部に付着した水滴は、プーリーの回転中に連通穴から噴出される空気流に乗って外向き環状溝の外側に排出される。そうして、プーリーにおけるカバーの外周に付着した水滴がベアリングに進入することを防止している。   For example, a pulley for an internal combustion engine disclosed in Patent Document 1 includes an inner ring in which a central shaft is fitted via a bearing, an outer ring on which a belt is wound, and a ring-shaped disk portion that connects the inner ring and the outer ring. And the surface of the inner ring outside (opposite to the engine) is covered with a cover provided on the central axis. The cover is located outside the outer surface of the pulley. An outer annular groove is formed on the outer side of the pulley by the inner ring, outer ring, and disc part, and an inner annular groove is formed on the inner side (engine side) of the pulley by the inner ring, outer ring, and disc part. Has been. A communication hole communicating with the outward annular groove and the inward annular groove is formed in the inner peripheral portion (inner ring side) of the disc portion. The inward annular groove is provided with an inner rib that ejects air from the inward annular groove side through the communication hole toward the outward annular groove side when the pulley rotates. The water droplets adhering to the disc part are discharged to the outside of the outward annular groove on the air flow ejected from the communication hole during the rotation of the pulley. Thus, water droplets attached to the outer periphery of the cover in the pulley are prevented from entering the bearing.

特開２０１５−１６１３９４号公報Japanese Patent Laying-Open No. 2015-161394

悪路や未舗装路、雨量の多い地域など車両の走行する環境によっては、プーリーには、多くの水、泥、塵などの異物がかかったりする場合があり、連通穴が塞がる虞がある。そうすると、連通穴から空気を噴射できずに水がベアリングに流れることを防止できなくなる。   Depending on the environment in which the vehicle travels, such as bad roads, unpaved roads, and areas with heavy rainfall, the pulleys may be subject to a lot of foreign matter such as water, mud, and dust, and the communication holes may be blocked. If it does so, it will become impossible to prevent air from injecting from a communicating hole and flowing into a bearing.

本発明は、上記事情に鑑みてなされたもので、その目的の一つは、プーリー本体の軸支部に水などの異物がかかり難いプーリーを提供することにある。   The present invention has been made in view of the above circumstances, and one of its purposes is to provide a pulley in which foreign matter such as water is hardly applied to the shaft support portion of the pulley body.

本発明の一態様に係るプーリーは、ベルトが巻き掛けられると共に、エンジンの外側に軸支部で回転自在に装着されるプーリー本体と、エンジンの外側から軸支部を覆うカバーとを備える。プーリー本体は、カバーの外周の少なくとも一部を囲むように形成される壁部を有する。壁部は、カバーよりも外側に突出している。   A pulley according to an aspect of the present invention includes a pulley body that is wound around a belt and rotatably mounted on an outer side of an engine by a shaft support part, and a cover that covers the shaft support part from the outside of the engine. The pulley body has a wall portion formed so as to surround at least a part of the outer periphery of the cover. The wall part protrudes outside the cover.

上記プーリーは、プーリー本体の軸支部に水などの異物がかかり難い。カバーの外周の少なくとも一部を囲むプーリー本体の壁部が、カバーよりも外側に突出していることで、路面から跳ね上がった異物がプーリーの外周側からかかることを防ぐことができるからである。   In the pulley, foreign matter such as water is hardly applied to the shaft support portion of the pulley body. This is because the wall portion of the pulley main body that surrounds at least a part of the outer periphery of the cover protrudes outward from the cover, thereby preventing foreign matter jumping up from the road surface from being applied from the outer peripheral side of the pulley.

実施形態に係るプーリーの概略を示す正面図である。It is a front view showing the outline of the pulley concerning an embodiment. 実施形態に係るプーリーの概略を示す部分断面図である。It is a fragmentary sectional view showing the outline of the pulley concerning an embodiment.

本発明のプーリーの実施形態を、図１、図２を参照しつつ以下に説明する。   Embodiment of the pulley of this invention is demonstrated below, referring FIG. 1, FIG.

《プーリー》
実施形態に係るプーリー１は、図１に示すように、無端ベルト１８が巻き掛けられると共に、エンジン１０の外側に軸支部３で回転自在に装着されるプーリー本体２と、エンジン１０の外側から軸支部３を覆うカバー４とを備える。このプーリー１の主たる特徴とするところは、プーリー本体２がカバー４の外周の少なくとも一部を囲む壁部２２を有し、その壁部２２が特定の高さを有する点にある。以下、プーリー１の詳細を説明する。ここでは、プーリー１は、エンジン１０のクランクシャフト１２の先端に取り付けられるクランクプーリー１４に掛け渡される無端ベルト１８に所定の張力を付与するテンションプーリー（アイドルプーリー）を構成する場合を例に説明する。クランクプーリー１４とテンションプーリー（プーリー１）とは、共通の無端ベルト１８が掛け渡されている。無端ベルト１８は、１本の連続するゴムベルトなどからなる。図２では説明の便宜上、プーリー１のみを示し、エンジン、クランクプーリー、無端ベルトなどを省略している。 "pulley"
As shown in FIG. 1, the pulley 1 according to the embodiment includes a pulley main body 2 around which an endless belt 18 is wound and rotatably mounted on the outside of the engine 10 by a shaft support portion 3, and a shaft from the outside of the engine 10. And a cover 4 that covers the branch 3. The main feature of the pulley 1 is that the pulley body 2 has a wall portion 22 that surrounds at least a part of the outer periphery of the cover 4, and the wall portion 22 has a specific height. Hereinafter, the details of the pulley 1 will be described. Here, the case where the pulley 1 constitutes a tension pulley (idle pulley) that applies a predetermined tension to the endless belt 18 that is stretched over the crank pulley 14 attached to the tip of the crankshaft 12 of the engine 10 will be described as an example. . A common endless belt 18 is stretched over the crank pulley 14 and the tension pulley (pulley 1). The endless belt 18 is composed of one continuous rubber belt or the like. In FIG. 2, only the pulley 1 is shown for convenience of explanation, and the engine, crank pulley, endless belt, and the like are omitted.

〔プーリー本体〕
プーリー本体２は、リング状に形成され、クランクプーリー１４の回転に伴って回転する無端ベルト１８によりクランクプーリー１４の回転に同期して回転する。このプーリー本体２（プーリー１）は、上述したように無端ベルト１８に所定の張力を付与するテンションプーリーとして機能する。無端ベルト１８の外周面は、クランクプーリー１４とプーリー１との間で、補機（ウォーターポンプ：図示略）のプーリー（ここではウォーターポンププーリー１６）と接触している。それにより、無端ベルト１８を介してエンジン１０の動力（クランクシャフト１２の回転力）がウォーターポンププーリー１６に伝達され、ウォーターポンプが駆動される。プーリー本体２により無端ベルト１８に張力を付与していることで、無端ベルト１８を介してウォーターポンププーリー１６に動力を伝達させ易い。無端ベルト１８の内周面は、複数の山型の突条部（図示略）が形成されている。各突条部の長手方向は、無端ベルト１８の周方向に沿っており、複数の突条部の並列方向は、無端ベルト１８の軸方向（幅方向）に沿っている。 [Pulley body]
The pulley body 2 is formed in a ring shape, and rotates in synchronization with the rotation of the crank pulley 14 by an endless belt 18 that rotates as the crank pulley 14 rotates. The pulley body 2 (pulley 1) functions as a tension pulley that applies a predetermined tension to the endless belt 18 as described above. The outer peripheral surface of the endless belt 18 is in contact with a pulley (water pump pulley 16 in this case) of an auxiliary machine (water pump: not shown) between the crank pulley 14 and the pulley 1. Thereby, the power of the engine 10 (rotational force of the crankshaft 12) is transmitted to the water pump pulley 16 via the endless belt 18, and the water pump is driven. By applying tension to the endless belt 18 by the pulley body 2, it is easy to transmit power to the water pump pulley 16 via the endless belt 18. On the inner peripheral surface of the endless belt 18, a plurality of mountain-shaped protrusions (not shown) are formed. The longitudinal direction of each protrusion is along the circumferential direction of the endless belt 18, and the parallel direction of the plurality of protrusions is along the axial direction (width direction) of the endless belt 18.

プーリー本体２の内周面には、エンジン１０の外側（図１紙面手前側、図２紙面下側）に設けられる軸支部３が装着される。軸支部３は、エンジン１０に固定されて回転しない中心軸部３１と、中心軸部３１とプーリー本体２との間に介在されてプーリー本体２を回転自在に装着させるベアリング３２とを備える（図２）。プーリー本体２の外周面は、無端ベルト１８が掛け渡される（図１）。プーリー本体２の外周面には、無端ベルト１８（図１）における複数の山型の突条部が嵌め込まれる複数のＶ字状の溝部２１が形成されている（図２）。無端ベルト１８の突条部とプーリー本体２の溝部２１との嵌合により、無端ベルト１８とプーリー本体２とを位置決めして、無端ベルト１８のずれを抑制している。各溝部２１の長手方向は、プーリー本体２の周方向に沿っており、複数の溝部２１の並列方向は、プーリー本体２の軸方向に沿っている。プーリー本体２の外側面（エンジン１０と反対側面）には、後述するカバー４の外周の少なくとも一部を囲むように壁部２２が形成されている。   On the inner peripheral surface of the pulley body 2, a shaft support portion 3 provided on the outside of the engine 10 (the front side in FIG. 1 and the lower side in FIG. 2) is mounted. The shaft support portion 3 includes a center shaft portion 31 that is fixed to the engine 10 and does not rotate, and a bearing 32 that is interposed between the center shaft portion 31 and the pulley body 2 and rotatably mounts the pulley body 2 (see FIG. 2). An endless belt 18 is stretched over the outer peripheral surface of the pulley body 2 (FIG. 1). On the outer peripheral surface of the pulley body 2, a plurality of V-shaped grooves 21 into which a plurality of mountain-shaped protrusions in the endless belt 18 (FIG. 1) are fitted are formed (FIG. 2). By fitting the protruding portion of the endless belt 18 and the groove portion 21 of the pulley body 2, the endless belt 18 and the pulley body 2 are positioned to suppress the deviation of the endless belt 18. The longitudinal direction of each groove portion 21 is along the circumferential direction of the pulley body 2, and the parallel direction of the plurality of groove portions 21 is along the axial direction of the pulley body 2. A wall portion 22 is formed on the outer side surface of the pulley body 2 (the side surface opposite to the engine 10) so as to surround at least a part of the outer periphery of the cover 4 described later.

［壁部］
壁部２２は、カバー４の外側面よりも外側に突出している。即ち、壁部２２の端面は、カバー４の外側面のうちエンジン１０から最も離れた位置よりも外側に位置している。それにより、走行中などで路面から跳ね上がった水、泥、塵などの異物がプーリー本体２の外周側から軸支部３（特にベアリング３２）にかかることを抑制する。 [Wall]
The wall portion 22 projects outward from the outer surface of the cover 4. That is, the end surface of the wall portion 22 is located on the outer side of the outer surface of the cover 4 farthest from the engine 10. Thereby, foreign matters such as water, mud, and dust splashed from the road surface during traveling are prevented from being applied to the shaft support portion 3 (particularly the bearing 32) from the outer peripheral side of the pulley body 2.

壁部２２のプーリー本体２の径方向に沿った形成箇所は、カバー４の外周縁よりも外側であれば特に限定されず適宜選択できる。壁部２２の上記形成箇所は、プーリー本体２の外周縁としてもよいし、プーリー本体２の外周縁とカバー４の外周縁との間としてもよい。ここでは、壁部２２の上記形成箇所は、プーリー本体２の外周縁としている。壁部２２の外周面は、プーリー本体２の溝部２１よりも外周側に位置している。そのため、エンジン組立時に無端ベルト１８をプーリー本体２に掛け渡す際に、掛け渡す位置がプーリー本体２の溝部２１ではなく壁部２２の外周面となるような無端ベルト１８の掛けずれが生じても、プーリー本体２の回転に伴ってそのずれを是正できる。壁部２２から壁部２２に隣接する溝部２１に向かって段差が形成されるため、プーリー本体２の回転に伴って無端ベルト１８が壁部２２の外周面からプーリー本体２の溝部２１にスライド移動して無端ベルト１８の突条部を嵌め込むことができるからである。   The formation location of the wall portion 22 along the radial direction of the pulley body 2 is not particularly limited as long as it is outside the outer peripheral edge of the cover 4 and can be appropriately selected. The formation location of the wall portion 22 may be the outer peripheral edge of the pulley main body 2 or may be between the outer peripheral edge of the pulley main body 2 and the outer peripheral edge of the cover 4. Here, the said formation location of the wall part 22 is made into the outer periphery of the pulley main body 2. FIG. The outer peripheral surface of the wall portion 22 is located on the outer peripheral side of the groove portion 21 of the pulley body 2. Therefore, when the endless belt 18 is hung on the pulley body 2 when the engine is assembled, even if the endless belt 18 is displaced so that the hung position is not the groove 21 of the pulley body 2 but the outer peripheral surface of the wall 22. The deviation can be corrected as the pulley body 2 rotates. Since a step is formed from the wall portion 22 toward the groove portion 21 adjacent to the wall portion 22, the endless belt 18 slides from the outer peripheral surface of the wall portion 22 to the groove portion 21 of the pulley body 2 as the pulley body 2 rotates. This is because the protruding portion of the endless belt 18 can be fitted.

壁部２２のプーリー本体２の周方向に沿った形成領域（長さ）は、周方向の少なくとも一部とすることができる。壁部２２の上記長さにもよるが、プーリー本体２は走行中に回転しているため、壁部２２の上記形成領域が全周に亘っておらず、部分的に壁部２２の形成されない隙間が形成されていても、その隙間を通って内周側に水が浸入し難いからである。壁部２２の上記形成領域は、周長の１／３以上に亘る領域が好ましく、更に、周長の１／２以上に亘る領域が好ましく、特に、周長の２／３以上に亘る領域が好ましい。壁部２２の数は複数でもよく、壁部２２の数を複数とする場合には、壁部２２の上記形成領域は壁部２２の合計した領域とする。壁部２２の数を複数とする場合、壁部２２は、互いのプーリー本体２の周方向に沿った距離が等間隔となるように形成することが挙げられる。壁部２２の上記形成領域は、全周に亘ることが好ましい。ここでは、壁部２２の上記形成領域は、全周に亘っている。   The formation region (length) of the wall portion 22 along the circumferential direction of the pulley body 2 can be at least part of the circumferential direction. Although depending on the length of the wall portion 22, the pulley body 2 rotates during traveling, so the formation region of the wall portion 22 does not extend over the entire circumference, and the wall portion 22 is not partially formed. This is because even if a gap is formed, it is difficult for water to enter the inner peripheral side through the gap. The region where the wall portion 22 is formed is preferably a region extending over 1/3 of the circumferential length, more preferably a region extending over 1/2 of the circumferential length, and particularly a region extending over 2/3 of the circumferential length. preferable. The number of the wall portions 22 may be plural, and when the number of the wall portions 22 is plural, the formation region of the wall portion 22 is a total region of the wall portions 22. In the case where the number of the wall portions 22 is plural, the wall portions 22 may be formed such that the distances along the circumferential direction of the pulley bodies 2 are equal. It is preferable that the formation region of the wall portion 22 extends over the entire circumference. Here, the formation region of the wall portion 22 extends over the entire circumference.

壁部２２におけるカバー４の外側面のエンジン１０から最も離れた位置からの突出長さＬ（図２）は、壁部２２の端面ａ（図２中の矢羽根で示す）とカバー４のエンジン側端面ｂ（矢羽根で示す）とを結ぶ仮想線の延長線（二点鎖線で示す）がベアリング３２と交差せずプーリー本体２と交差する程度、即ち、ベアリング３２とプーリー本体２との境界に達しない程度とすることが好ましい。そうすれば、水などの異物がプーリー本体２の外周側からベアリング３２にかかることを抑制し易い。壁部２２の上記突出量Ｌは、長いほどベアリング３２への水かかりを抑制し易いが、他の部材との位置関係から他の部材に干渉することなく過度に長すぎない程度とすることが挙げられる。   The protrusion length L (FIG. 2) of the outer side surface of the cover 4 at the wall portion 22 from the position farthest from the engine 10 is the end surface a of the wall portion 22 (shown by the arrow blades in FIG. The extent to which the extension line (indicated by a two-dot chain line) connecting the side end face b (indicated by an arrow blade) intersects the pulley body 2 without intersecting the bearing 32, that is, the boundary between the bearing 32 and the pulley body 2. It is preferable to set it to a level that does not reach. If it does so, it will be easy to suppress that foreign materials, such as water, will apply to the bearing 32 from the outer peripheral side of the pulley main body 2. FIG. The longer the protrusion L of the wall portion 22 is, the easier it is to prevent water from being applied to the bearing 32, but it should be set to an extent that is not excessively long without interfering with other members due to the positional relationship with other members. Can be mentioned.

〔カバー〕
カバー４は、エンジン１０の外側から軸支部３を覆う。それにより、水などの異物がプーリー１の外側から軸支部３にかかることを抑制する。カバー４の形状は、円板状であり、その直径は、ベアリング３２よりも大きく、プーリー本体２よりも小さい。即ち、プーリー本体２における壁部２２とカバー４の外周縁との間には、環状の凹部が形成される。この凹部には、プーリー本体２に無端ベルト１８を掛け渡すときに、プーリー１を保持する筒状の治具を嵌め込むことができる。そのため、プーリー本体２に無端ベルト１８を掛け渡すときに、プーリー本体２の溝部２１を治具で把持しなくてもよいため、把持に伴う溝部２１の損傷を防止できる。カバー４の外周縁は、プーリー本体２側に折り曲げられている。それにより、水などの異物がプーリー本体２の外周側から軸支部３（ベアリング３２）にかかることをより一層抑制し易い。カバー４の軸支部３への固定は、ナット４１で締め付けることで行える。 〔cover〕
The cover 4 covers the shaft support 3 from the outside of the engine 10. Thereby, foreign matter such as water is prevented from being applied to the shaft support portion 3 from the outside of the pulley 1. The shape of the cover 4 is a disk shape, and its diameter is larger than the bearing 32 and smaller than the pulley body 2. That is, an annular recess is formed between the wall portion 22 in the pulley body 2 and the outer peripheral edge of the cover 4. A cylindrical jig for holding the pulley 1 can be fitted into the recess when the endless belt 18 is wound around the pulley body 2. Therefore, when the endless belt 18 is hung on the pulley body 2, it is not necessary to grip the groove portion 21 of the pulley body 2 with a jig. Therefore, damage to the groove portion 21 due to gripping can be prevented. The outer peripheral edge of the cover 4 is bent toward the pulley body 2 side. Thereby, it is easier to further suppress foreign matters such as water from being applied to the shaft support portion 3 (bearing 32) from the outer peripheral side of the pulley body 2. The cover 4 can be fixed to the shaft support portion 3 by tightening with a nut 41.

〔作用効果〕
以上説明した実施形態に係るプーリー１は、以下の効果を奏することができる。 [Function and effect]
The pulley 1 according to the embodiment described above can achieve the following effects.

（１）プーリー本体２の外周縁の全周に形成されてカバー４の外周全周を囲む壁部２２が、カバー４よりも外側に突出していることで、路面から跳ね上がった水などの異物がプーリー１の外周側から軸支部３（ベアリング３２）にかかることを防ぐことができる。   (1) Since the wall portion 22 that is formed on the entire outer periphery of the pulley body 2 and surrounds the entire outer periphery of the cover 4 protrudes outward from the cover 4, foreign matters such as water splashed from the road surface It is possible to prevent the shaft support 3 (bearing 32) from being applied from the outer peripheral side of the pulley 1.

（２）壁部２２の外周面に無端ベルト１８が掛け渡されるような無端ベルト１８の掛けずれが生じても、その掛けずれを是正できる。壁部２２の外周面がプーリー本体２の溝部２１よりも外周側に位置していることで、壁部２２から壁部２２に隣接する溝部２１に向かって段差が形成されるため、プーリー本体２の回転に伴って無端ベルト１８が壁部２２の外周面からプーリー本体２の溝部２１にスライド移動して無端ベルト１８の突条部を嵌め込むことができるからである。   (2) Even when the endless belt 18 is displaced such that the endless belt 18 is stretched around the outer peripheral surface of the wall portion 22, the engagement can be corrected. Since the outer peripheral surface of the wall portion 22 is positioned on the outer peripheral side with respect to the groove portion 21 of the pulley main body 2, a step is formed from the wall portion 22 toward the groove portion 21 adjacent to the wall portion 22. This is because the endless belt 18 slides from the outer peripheral surface of the wall portion 22 to the groove portion 21 of the pulley body 2 with the rotation of the endless belt 18 so that the protruding portion of the endless belt 18 can be fitted.

本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   The present invention is not limited to these exemplifications, but is defined by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

本発明のプーリーは、内燃機関のテンションプーリー（アイドルプーリー）に好適に利用できる。本発明のプーリーは、悪路や未舗装路、雨量の多い地域などを走行する自動車に好適に利用できる。   The pulley of the present invention can be suitably used as a tension pulley (idle pulley) of an internal combustion engine. The pulley of the present invention can be suitably used for automobiles traveling on rough roads, unpaved roads, areas with a lot of rainfall, and the like.

１ プーリー
２ プーリー本体
２１ 溝部 ２２ 壁部
３ 軸支部
３１ 中心軸部 ３２ ベアリング
４ カバー ４１ ナット
１０ エンジン
１２ クランクシャフト １４ クランクプーリー
１６ ウォーターポンププーリー
１８ 無端ベルト DESCRIPTION OF SYMBOLS 1 Pulley 2 Pulley main body 21 Groove part 22 Wall part 3 Shaft support part 31 Center shaft part 32 Bearing 4 Cover 41 Nut 10 Engine 12 Crankshaft 14 Crank pulley 16 Water pump pulley 18 Endless belt

Claims (1)

ベルトが巻き掛けられると共に、エンジンの外側に軸支部で回転自在に装着されるプーリー本体と、
前記エンジンの外側から前記軸支部を覆うカバーとを備えるプーリーであって、
前記プーリー本体は、前記カバーの外周の少なくとも一部を囲むように形成される壁部を有し、
前記壁部は、前記カバーよりも外側に突出しているプーリー。 A pulley body that is wound around the belt and rotatably mounted on the outside of the engine with a shaft support,
A pulley comprising a cover that covers the shaft support portion from the outside of the engine,
The pulley body has a wall portion formed so as to surround at least a part of the outer periphery of the cover,
The wall portion is a pulley protruding outward from the cover.
JP2016035457A 2016-02-26 2016-02-26 pulley Active JP6734005B2 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003232434A (en) * 2002-02-07 2003-08-22 Nsk Ltd Pulley device with built-in one-way clutch
JP2006234008A (en) * 2005-02-22 2006-09-07 Nsk Ltd Pulley device with built-in one-way clutch
JP2007292161A (en) * 2006-04-24 2007-11-08 Toyota Motor Corp Rotor supporting structure and idler pulley supporting structure as well as rotor supporting unit
JP2009174683A (en) * 2008-01-28 2009-08-06 Ntn Corp Bearing with resin pulley
JP2010270882A (en) * 2009-05-25 2010-12-02 Ntn Corp Bearing with pulley, and dust cover used for the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003232434A (en) * 2002-02-07 2003-08-22 Nsk Ltd Pulley device with built-in one-way clutch
JP2006234008A (en) * 2005-02-22 2006-09-07 Nsk Ltd Pulley device with built-in one-way clutch
JP2007292161A (en) * 2006-04-24 2007-11-08 Toyota Motor Corp Rotor supporting structure and idler pulley supporting structure as well as rotor supporting unit
JP2009174683A (en) * 2008-01-28 2009-08-06 Ntn Corp Bearing with resin pulley
JP2010270882A (en) * 2009-05-25 2010-12-02 Ntn Corp Bearing with pulley, and dust cover used for the same

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