JP2008157405A - Power transmission device - Google Patents

Power transmission device Download PDF

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JP2008157405A
JP2008157405A JP2006349506A JP2006349506A JP2008157405A JP 2008157405 A JP2008157405 A JP 2008157405A JP 2006349506 A JP2006349506 A JP 2006349506A JP 2006349506 A JP2006349506 A JP 2006349506A JP 2008157405 A JP2008157405 A JP 2008157405A
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inner hub
power
transmission device
power transmission
shaft
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JP2006349506A
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JP4803022B2 (en
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Yoshiki Tada
世史紀 多田
Michiyasu Nosaka
倫保 野坂
Yasuo Tabuchi
泰生 田渕
Takayuki Suzuki
孝行 鈴木
Keiji Ishikawa
恵次 石川
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved limiter-type power transmission device utilizing thread fastening, having inexpensive construction for preventing the rotation of an inner hub and a power cut-off member. <P>SOLUTION: The power transmission device 1 comprises the inner hub 4 to be rotated integrally with a pulley 2, and the power cut-off member 5 fitted to a cylindrical portion 4041 of the inner hub 4 and threaded to a shaft 3 of a driven device. A rotation preventing means 11 is formed on at least one of the cylindrical portion 4041 of the inner hub 4 and the power cut-off member 5 with plastic work for preventing the rotation thereof. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、動力伝達装置に関するもので、特に、エンジン等の外部動力源から、ベルト等を介して運転されるカーエアコン用の圧縮機に用いて有効な、動力伝達装置に関するものである。   The present invention relates to a power transmission device, and more particularly to a power transmission device effective for use in a compressor for a car air conditioner that is operated from an external power source such as an engine via a belt or the like.

従来、圧縮機に動力を伝達する動力伝達装置として、圧縮機が焼き付きを起こした際に動力伝達のためのベルト切れ等の不具合を回避する動力伝達装置が知られている（例えば特許文献１）。
特開２００３−３０７２６５号 2. Description of the Related Art Conventionally, as a power transmission device that transmits power to a compressor, a power transmission device that avoids problems such as belt breakage for power transmission when the compressor burns in is known (for example, Patent Document 1). .
JP 2003-307265 A

上記特許文献１における動力伝達装置は、過大なトルクが加わった場合、螺子面とシャフト先端の座面が滑り、螺子が増し締めされた結果、螺子面が設けられた部位を軸方向に引っ張る力（以下、軸力）が高くなり、シャフト先端の座面と接触するフランジ部と螺子面が設けられた部位との間に位置する狭径部を破断させるものである。   In the power transmission device in Patent Document 1 described above, when excessive torque is applied, the screw surface and the seat surface of the shaft tip slip, and the screw is tightened. As a result, the force that pulls the portion provided with the screw surface in the axial direction (Hereinafter, the axial force) is increased, and the narrow-diameter portion located between the flange portion in contact with the seating surface at the tip of the shaft and the portion provided with the screw surface is broken.

また、特許文献２には、インナーハブと動力遮断部材を多角形状でインロー嵌合させて回り止めした動力伝達装置が記載されている。
特開２００６−２６６３７６号 Patent Document 2 describes a power transmission device in which an inner hub and a power cut-off member are fitted in a polygonal shape with an inlay to prevent rotation.
JP 2006-266376 A

上記特許文献１及び２に記載の動力遮断部材では、インナーハブと動力伝達部材とが、一体となって回転する必要があり、上記特許文献２のように、インナーハブと動力遮断部材を多角形状でインロー嵌合させて回り止めをする構成では、インナーハブの嵌合部を多角形に加工する必要があり、製造コストが高騰するという課題がある。   In the power shut-off members described in Patent Documents 1 and 2, the inner hub and the power transmission member need to rotate integrally. As in Patent Document 2, the inner hub and the power shut-off member are polygonal. In the configuration in which the spigot fitting is performed to prevent the rotation, it is necessary to process the fitting portion of the inner hub into a polygon, and there is a problem that the manufacturing cost increases.

本発明はこのような課題を改善するために提案されたものであって、螺子締結を利用したリミッタ方式の動力伝達装置において、インナーハブと動力遮断部材とを安価な構成で回り止めする動力伝達装置を提供することを目的とする。   The present invention has been proposed in order to improve such a problem, and in a limiter-type power transmission device using screw fastening, the power transmission for preventing the inner hub and the power shut-off member from rotating with an inexpensive configuration. An object is to provide an apparatus.

上記の課題を解決するために、請求項１に記載の発明は、動力源と動力的に結合してなるプーリ（２）と、プーリ（２）に接続されて、プーリ（２）と一体で回転するインナーハブ（４）と、インナーハブ（４）に嵌合され、被駆動装置のシャフト（３）と螺子結合する動力遮断部材（５）とを有し、プーリ（２）から前記被駆動装置のシャフト（３）へ、インナーハブ（４）を介して回転動力を伝達する動力伝達装置（１）であって、インナーハブ（４）は、円筒部を備え、動力遮断部材（５）は、円筒部に嵌合され、プーリ（２）からの回転力により過度にねじ込まれることで生じる、過大軸力によって分断する破断部（５０４）を備え、インナーハブ（４）と前記動力遮断部材（５）とは、インナーハブ（４）の円筒部または動力遮断部材（５）の少なくとも一方に塑性加工により形成された回り止め手段（１１）により回り止めされていることを特徴とする。
これにより、インナーハブ（４）の動力遮断部材（５）との嵌合部を、多角形に加工する必要がなくなり、製造コストを低く抑えることができる。 In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a pulley (2) formed by power coupling with a power source, and connected to the pulley (2) and integrated with the pulley (2). A rotating inner hub (4) and a power shut-off member (5) fitted to the inner hub (4) and screw-coupled to the shaft (3) of the driven device are included. A power transmission device (1) for transmitting rotational power to the shaft (3) of the device via an inner hub (4), the inner hub (4) having a cylindrical portion, and a power cutoff member (5) And a breakage portion (504) that is cut off by an excessive axial force that is generated by being excessively screwed by the rotational force from the pulley (2), and is fitted to the cylindrical portion, and includes the inner hub (4) and the power cutoff member ( 5) means the cylindrical part of the inner hub (4) or power shut off Characterized in that it is prevented from rotating by the wood detent means formed by plastic working at least one of (5) (11).
Thereby, it is not necessary to process a fitting part with the power cutoff member (5) of the inner hub (4) into a polygon, and the manufacturing cost can be kept low.

またより具体的には、請求項２、３に記載の発明のように、回り止め手段（１１）を、インナーハブ（４）と動力遮断部材（５）との嵌合箇所において、インナーハブ（４）と動力遮断部材（５）いずれか一方にかしめ加工により突出形成した回り止め（４０２）と、他方に形成した突状の逃がし部（５０４）とにより構成することができる。   More specifically, as in the inventions according to claims 2 and 3, the rotation preventing means (11) is provided at the position where the inner hub (4) and the power shut-off member (5) are fitted with the inner hub ( 4) and the power cut-off member (5) can be configured by a rotation stopper (402) formed by caulking on one of them and a protruding relief portion (504) formed on the other.

また請求項４に記載の発明は、請求項１ないし３のいずれか一つに記載の発明において、シャフト（３）は、インナーハブ（４）が接触する座面を備え、動力遮断部材（５）は、螺刻した前記シャフト（３）の外周部に螺着する螺子部（５０１）と、インナーハブ（４）の円筒部に嵌合し、螺子部（５０１）がねじ込まれるとインナーハブに圧接するフランジ部（５０２）とを有し、動力遮断部材（５）は、フランジ部（５０２）によってインナーハブをシャフト（３）の座面に圧接させることでプーリ（３）からの回転動力をシャフト（３）に伝達し、破断部（５０４）は、螺子部（５０１）とフランジ部（５０２）との間に位置していることを特徴とする。
これにより、被駆動装置のシャフト（３）が回転不能となったとき、螺子部（５０１）は、さらにシャフト（３）に沿ってねじ込まれが、フランジ部（５０２）は、円筒部に嵌合した状態で保持されている。よって、螺子部（５０１）とフランジ部（５０２）との間に、過大な軸力がかかり、動力遮断部材（５）は、フランジ部（５０２）と螺子部（５０１）との間の破断部（５０４）において、分断される。 According to a fourth aspect of the present invention, in the first aspect of the present invention, the shaft (3) includes a seating surface with which the inner hub (4) contacts, and the power cutoff member (5). ) Is fitted into a threaded portion (501) to be screwed onto the outer peripheral portion of the threaded shaft (3) and a cylindrical portion of the inner hub (4), and when the threaded portion (501) is screwed into the inner hub, The power shut-off member (5) has a flange portion (502) that is press-contacted, and the rotational force from the pulley (3) is generated by pressing the inner hub against the seat surface of the shaft (3) by the flange portion (502). It transmits to a shaft (3) and the fracture | rupture part (504) is located between a screw part (501) and a flange part (502), It is characterized by the above-mentioned.
As a result, when the shaft (3) of the driven device becomes non-rotatable, the screw portion (501) is further screwed along the shaft (3), but the flange portion (502) is fitted into the cylindrical portion. It is held in the state. Therefore, an excessive axial force is applied between the screw portion (501) and the flange portion (502), and the power cut-off member (5) is a fracture portion between the flange portion (502) and the screw portion (501). In (504), it is divided.

また請求項５に記載の発明は、請求項１ないし４のいずれか一つに記載の発明において、破断部（５０４）に切込溝（ｐ）を形成することを特徴とする。
これにより、動力遮断部材を破断部（５０４）において、確実に分断することができる。 The invention according to claim 5 is characterized in that, in the invention according to any one of claims 1 to 4, a notch groove (p) is formed in the fracture portion (504).
Thereby, a power interruption member can be parted reliably in a fracture | rupture part (504).

また請求項６に記載の発明は、請求項１ないし５のいずれか一つに記載の発明において、インナーハブ（４）の動力遮断部材（５）との嵌合箇所において、動力遮断部材（５）の脱落防止用の抜け止め手段（４０３）を設けたことで、動力遮断部材（５）が分断しても、フランジ部（５０２）が脱落することはない。   According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the power cut-off member (5 ) Is provided to prevent the flange portion (502) from falling off even if the power cut-off member (5) is divided.

より具体的には、請求項７に記載の発明のように、抜け止め手段（４０３）を、円筒部の周縁部に、かしめ加工によって形成することができる。
なお、上記各手段、並びに以下に記載する各手段に付した括弧内の参照符号は、後述する実施形態記載の具体的手段との対応関係を示す一例である。 More specifically, as in the invention described in claim 7, the retaining means (403) can be formed on the peripheral edge of the cylindrical portion by caulking.
In addition, the reference numerals in parentheses attached to each of the above means and each means described below are an example showing a correspondence relationship with specific means described in the embodiment described later.

図１、図２は、エンジン等の動力源の動力を、エアコンを構成する圧縮機などの被駆動装置（図示省略）に伝達する動力伝達装置1を示す図である。
この動力伝達装置１は、動力源から圧縮機のシャフト３へ、回転動力を伝達するものであり、動力源とベルトにより機械的に連結し、回転動力が伝達されるプーリ２と、プーリ２と一体で回転するインナーハブ４と、インナーハブ４に嵌合され、圧縮機のシャフト３と螺子結合する動力遮断部材５とを備えている。 FIG. 1 and FIG. 2 are diagrams showing a power transmission device 1 that transmits the power of a power source such as an engine to a driven device (not shown) such as a compressor constituting an air conditioner.
The power transmission device 1 transmits rotational power from a power source to a shaft 3 of a compressor. The power transmission device 1 is mechanically connected to the power source and a belt to transmit the rotational power. An inner hub 4 that rotates integrally, and a power shut-off member 5 that is fitted to the inner hub 4 and screw-coupled to the compressor shaft 3 are provided.

プーリ２は、被駆動装置のハウジング６に、軸受７を介して回転可能に保持されている。軸受７は、被駆動装置のシャフト３と同軸に配置されており、被駆動装置のボス部外周に挿入され、環８、リング部材９によって抜け留めされている。
また、プーリ２の、シャフト３先端に向いた側の外周近傍の凹凸部２０１に、インナーハブ４が、弾性部材よりなる嵌合凸部４０１を介して一体的に嵌合している。 The pulley 2 is rotatably held by a housing 6 of the driven device via a bearing 7. The bearing 7 is disposed coaxially with the shaft 3 of the driven device, is inserted into the outer periphery of the boss portion of the driven device, and is retained by the ring 8 and the ring member 9.
Further, the inner hub 4 is integrally fitted to the concave and convex portion 201 near the outer periphery of the pulley 2 on the side facing the tip of the shaft 3 via a fitting convex portion 401 made of an elastic member.

シャフト３は、被駆動装置に図示しないベアリングを介して回転可能に保持されており、ボス部の内側において、径が拡大する座面Ｓを備えている。
座面Ｓは、動力遮断部材５とシャフト３の螺子結合によって発生する軸力で、ワッシャ１０と摩擦接触し、インナーハブ４からワッシャ１０を介して回転動力が伝達される部位である。 The shaft 3 is rotatably held by a driven device via a bearing (not shown), and includes a seat surface S whose diameter is increased inside the boss portion.
The seat surface S is an axial force generated by screw connection between the power cut-off member 5 and the shaft 3, and is a portion that frictionally contacts the washer 10, and rotational power is transmitted from the inner hub 4 through the washer 10.

インナーハブ４には、インナーハブ４をプーリ２と共にシャフト３に装着した際に、シャフト３の中心軸と中心軸が一致する嵌入口ｈを設けている。
またインナーハブ４の表面側には、動力遮断部材５を受け入れると共に嵌合させるための動力遮断部材５の外形（ここでは円筒形）と同形状の円筒部４０４１を形成し、円筒部４０４１の底部に、動力遮断部材５のフランジ部（後述）を押圧状態で当接させるようにしている。
さらにインナーハブ４は、圧縮機のシャフト３寄りの部位において、シャフト３との結合部位周囲に形成した適宜な素材のワッシャ１０と当接している。 When the inner hub 4 is mounted on the shaft 3 together with the pulley 2, the inner hub 4 is provided with a fitting opening h in which the central axis of the shaft 3 coincides with the central axis.
A cylindrical portion 4041 having the same shape as the outer shape (here, cylindrical) of the power cutoff member 5 for receiving and fitting the power cutoff member 5 is formed on the surface side of the inner hub 4, and the bottom of the cylindrical portion 4041 is formed. In addition, a flange portion (described later) of the power cut-off member 5 is brought into contact in a pressed state.
Further, the inner hub 4 is in contact with a washer 10 made of an appropriate material formed around the coupling portion with the shaft 3 at a portion near the shaft 3 of the compressor.

そして動力遮断部材５は、外周部を螺刻したシャフト３に螺入していくことで、インナーハブ４の嵌入口ｈに嵌入させる螺子部５０１と、インナーハブ４表面の円筒部４０４１に嵌合し、螺子部５０１がねじ込まれるとインナーハブ４に圧接するフランジ部５０２とを有している。フランジ部５０２の外形は、インナーハブ４表面の円筒部４０４１と同形状（ここでは円形）の嵌合部５０３としている。
また、螺子部５０１とフランジ部５０２との間には破断部５０４が設けられ、破断部５０４には、微小な切込溝ｐが形成されている。 Then, the power shut-off member 5 is fitted into the screw portion 501 to be fitted into the fitting opening h of the inner hub 4 and the cylindrical portion 4041 on the surface of the inner hub 4 by being screwed into the shaft 3 whose outer peripheral portion is threaded. When the screw portion 501 is screwed in, the flange portion 502 press-contacts the inner hub 4. The outer shape of the flange portion 502 is a fitting portion 503 having the same shape (here, circular) as the cylindrical portion 4041 on the surface of the inner hub 4.
Further, a breakage portion 504 is provided between the screw portion 501 and the flange portion 502, and a minute cut groove p is formed in the breakage portion 504.

このような動力遮断部材５を、シャフト３にねじ込むと、インナーハブ４の嵌入口ｈに螺子部５０１を嵌入し、インナーハブ４表面の円筒部４０４１に嵌合させて圧接状態となる。
これにより、シャフト３の座面Ｓが、動力遮断部材５とシャフト３の螺子結合によって発生する軸力で、ワッシャ１０と摩擦接触し、インナーハブ４とシャフト３とがワッシャ１０を介して圧接し、プーリ２からの所定の回転動力が、インナーハブ４からワッシャ１０を介してシャフト３に伝達可能となる構成である（図３参照）。 When such a power shut-off member 5 is screwed into the shaft 3, the screw portion 501 is fitted into the fitting opening h of the inner hub 4 and is fitted into the cylindrical portion 4041 on the surface of the inner hub 4 to be in a pressure contact state.
As a result, the seat surface S of the shaft 3 is brought into frictional contact with the washer 10 by the axial force generated by the screw connection between the power cutoff member 5 and the shaft 3, and the inner hub 4 and the shaft 3 are pressed against each other via the washer 10. The predetermined rotational power from the pulley 2 can be transmitted from the inner hub 4 to the shaft 3 via the washer 10 (see FIG. 3).

シャフト３に所定の回転動力を伝達するためには、インナーハブ４と動力遮断部材５とが、一体となってずれなく回転することが必要であるが、そのために、フランジ部５０２の嵌合部５０３とインナーハブ４表面の円筒部４０４１とが回り止め手段１１を介して嵌合する構成としている。
回り止め手段１１として、例えばインナーハブ４側には、インナーハブ４の円筒部４０４１の表面周縁部に、かしめ加工によって、凸形状に形成した回り止め４０２を形成し、動力遮断部材５側には、フランジ部５０２の外縁部に、インナーハブ４の回り止め４０２と噛み合う凹形状の逃がし部５０５を設けている。 In order to transmit a predetermined rotational power to the shaft 3, it is necessary for the inner hub 4 and the power shut-off member 5 to rotate together without any deviation. 503 and the cylindrical portion 4041 on the surface of the inner hub 4 are configured to be fitted via the rotation preventing means 11.
As the anti-rotation means 11, for example, on the inner hub 4 side, a detent 402 formed in a convex shape by caulking is formed on the peripheral surface of the cylindrical portion 4041 of the inner hub 4, and on the power shut-off member 5 side. A concave relief portion 505 that engages with the rotation stopper 402 of the inner hub 4 is provided on the outer edge portion of the flange portion 502.

さらに、動力遮断部材５には、非常事態によって、螺子部５０１とフランジ部５０２とが分断した際に、フランジ部５０２が飛散しないようにするために、インナーハブ４の円筒部４０４１の周縁部に、かしめ加工によって、抜け止め手段４０３を設けている（図４参照）。   Further, the power shut-off member 5 is provided on the peripheral portion of the cylindrical portion 4041 of the inner hub 4 so that the flange portion 502 is not scattered when the screw portion 501 and the flange portion 502 are separated due to an emergency. The retaining means 403 is provided by caulking (see FIG. 4).

本発明にかかる動力伝達装置1は、以上のように構成されるものであり、次にその作用について説明する。
今、エンジン側から、動力伝達装置1におけるプーリ２に掛け渡されたベルト等の動力伝達部材を介し、回転力が伝えられると、この回転力は、前記プーリ２の凹凸部２０１と嵌合した、インナーハブ４の凹凸部４０１を介してインナーハブ４側に動力伝達される。 The power transmission device 1 according to the present invention is configured as described above, and the operation thereof will be described next.
Now, when the rotational force is transmitted from the engine side through a power transmission member such as a belt stretched around the pulley 2 in the power transmission device 1, the rotational force is engaged with the uneven portion 201 of the pulley 2. The power is transmitted to the inner hub 4 side through the uneven portion 401 of the inner hub 4.

インナーハブ４と動力遮断部材５とは、インナーハブ４側の円筒部４０４１の表面周縁部に形成した回り止め４０２と、動力遮断部材５におけるフランジ部５０２の外縁部の逃がし部５０５とが噛み合っている。
その際、動力遮断部材５とシャフト３の螺子結合によって発生する軸力で、シャフト３の座面Ｓがワッシャ１０と摩擦接触しているので、プーリ２からの所定の回転動力が、インナーハブ４、動力遮断部材５を通じて、シャフト３の座面Ｓを介し、エアコンの圧縮機のシャフト３に伝達することができ、エアコンを運転することができる。
圧縮機が正常に機能しているときは、所定のトルクで回転動作することができ、動力伝達装置1は、支障なく回転力を圧縮機に伝達することができる（図１参照）。 The inner hub 4 and the power cut-off member 5 are engaged with a rotation stopper 402 formed on the peripheral surface of the cylindrical portion 4041 on the inner hub 4 side and a relief portion 505 at the outer edge of the flange 502 in the power cut-off member 5. Yes.
At that time, since the seat surface S of the shaft 3 is in frictional contact with the washer 10 by the axial force generated by the screw coupling of the power cutoff member 5 and the shaft 3, the predetermined rotational power from the pulley 2 is applied to the inner hub 4. The power can be transmitted to the shaft 3 of the compressor of the air conditioner via the seating surface S of the shaft 3 through the power cut-off member 5, and the air conditioner can be operated.
When the compressor is functioning normally, it can rotate with a predetermined torque, and the power transmission device 1 can transmit the rotational force to the compressor without any trouble (see FIG. 1).

ここで、圧縮機が何らかの故障（例えば焼き付き）で、シャフト３の回転が不能となったような場合、このような状況下でも、エンジン側から、動力伝達部材を介してプーリ２に回転力が伝わり、インナーハブ４と動力遮断部材５とは、インナーハブ４側の回り止め４０２と、動力遮断部材５における逃がし部５０５とが噛み合っているため、動力遮断部材５はインナーハブ４と共に回転し続けようとする。
そうすると、動力遮断部材５の螺子部５０１が、シャフト３に過度にねじ込まれることで、フランジ部５０２と螺子部５０１との間に過大な軸力がかかり、この過大な軸力により、破断部５０４の、微小な切込溝ｐにおいて確実に分断させることができる。
これによって、プーリ２から圧縮機への動力を遮断することができる（図５参照）。 Here, when the compressor 3 has some trouble (for example, seizure) and the shaft 3 cannot be rotated, the rotational force is applied to the pulley 2 from the engine side via the power transmission member even under such a situation. Since the inner hub 4 and the power shut-off member 5 are engaged with the rotation stopper 402 on the inner hub 4 side and the relief portion 505 of the power shut-off member 5, the power shut-off member 5 continues to rotate together with the inner hub 4. Try to.
Then, the screw portion 501 of the power cut-off member 5 is excessively screwed into the shaft 3, so that an excessive axial force is applied between the flange portion 502 and the screw portion 501. The excessive axial force causes the fracture portion 504. The minute cut groove p can be surely divided.
As a result, power from the pulley 2 to the compressor can be shut off (see FIG. 5).

動力遮断部材５におけるフランジ部５０２と螺子部５０１とが分断すると、フランジ部５０２はフリーとなり、抜け落ちようとするが、インナーハブ４における円筒部４０４１の表面周縁部に形成した抜け止め手段４０３によって、フランジ部５０２が脱落して、飛散するようなことはない。   When the flange portion 502 and the screw portion 501 in the power cut-off member 5 are divided, the flange portion 502 becomes free and tries to come off, but by the retaining means 403 formed on the surface peripheral portion of the cylindrical portion 4041 in the inner hub 4, The flange portion 502 is not dropped and scattered.

以上のように本発明にかかる動力伝達装置1では、インナーハブ４側には、インナーハブ４の円筒部４０４１の表面周縁部に、かしめ加工によって、凸形状に形成した回り止め４０２を形成し、動力遮断部材５側には、フランジ部５０２の外縁部に、インナーハブ４の回り止め４０２と噛み合う凹形状の逃がし部５０５を設けるようにした。
このような構成により、インナーハブ４と動力遮断部材５とが、一体となってずれなく回転することができ、動力遮断部材５における破断部５０４が破断する、限界トルクを、安定したものとすることができる。
しかも、動力遮断部材５が破断したときも、フランジ部５０２の脱落を防止するのを、上述のように、かしめ加工という簡単な加工によって実現させることができ、製造コストを抑制することができる。 As described above, in the power transmission device 1 according to the present invention, on the inner hub 4 side, the rotation stopper 402 formed in a convex shape by caulking is formed on the surface peripheral portion of the cylindrical portion 4041 of the inner hub 4. On the power shut-off member 5 side, a concave relief portion 505 that engages with the rotation stopper 402 of the inner hub 4 is provided at the outer edge portion of the flange portion 502.
With such a configuration, the inner hub 4 and the power cut-off member 5 can be rotated integrally without any deviation, and the limit torque at which the breaking portion 504 in the power cut-off member 5 breaks is stabilized. be able to.
In addition, even when the power shut-off member 5 is broken, preventing the flange portion 502 from falling off can be realized by a simple process such as caulking as described above, and the manufacturing cost can be suppressed.

本発明にかかる動力伝達装置1は、以下のように構成することもできる。なお、この動力伝達装置1において、前述の動力伝達装置１と実質的に同様の構成要素には、同符号を付して、その説明は省略するものとする。
すなわち、図６、図７に示すように、この動力伝達装置1では、インナーハブ４の円形凹形状の円筒部４０４１に、多角形（ここでは６角形）の動力遮断部材５を設けている。インナーハブ４側には、かしめによる回り止め４０２が形成され、動力遮断部材５の多角形の２面幅を構成する面と噛み合うことにより、回り止めを実現している。 The power transmission device 1 according to the present invention can also be configured as follows. In this power transmission device 1, components that are substantially the same as those of the power transmission device 1 described above are denoted by the same reference numerals, and description thereof is omitted.
That is, as shown in FIGS. 6 and 7, in the power transmission device 1, a polygonal (here, hexagonal) power cutoff member 5 is provided in the circular concave cylindrical portion 4041 of the inner hub 4. On the inner hub 4 side, an anti-rotation 402 by caulking is formed, and the anti-rotation is realized by meshing with the surface of the power cut-off member 5 that forms a polygonal two-surface width.

動力遮断部材５が、過大トルクによってシャフト３に過度にねじ込まれることで生じる、過大な軸力によって分断すると、フランジ部５０２が離脱するが、動力遮断部材５の多角形の頂点部に凹形状のかしめの逃がし部５０５を形成し、インナーハブ４をかしめにより凸形状とすることによって、抜け止め手段４０３としている。なお、動力遮断部材５は、図では、６角形としているが、勿論、６角形に限らない。また、図１、図２に示すように、円形でもよい。   When the power cut-off member 5 is divided by an excessive axial force generated by being excessively screwed into the shaft 3 by an excessive torque, the flange portion 502 is detached, but a concave shape is formed at the polygonal apex portion of the power cut-off member 5. A caulking relief portion 505 is formed, and the inner hub 4 is formed into a convex shape by caulking to form the retaining means 403. In addition, although the power interruption member 5 is hexagonal in the figure, of course, it is not restricted to hexagonal. Moreover, as shown in FIG. 1, FIG. 2, circular may be sufficient.

本発明にかかる動力伝達装置の一例を示す、断面説明図である。It is a section explanatory view showing an example of the power transmission device concerning the present invention. 図１に示す動力伝達装置の、正面説明図である。It is front explanatory drawing of the power transmission device shown in FIG. 図１に示す動力伝達装置の、拡大的要部断面説明図である。It is an expanded principal part cross-section explanatory drawing of the power transmission device shown in FIG. 図３に示す動力伝達装置の、要部正面説明図である。It is principal part front explanatory drawing of the power transmission device shown in FIG. 本発明にかかる動力伝達装置の動力遮断部材を作動した状態を示す、断面説明図である。It is a section explanatory view showing the state where the power interruption member of the power transmission device concerning the present invention was operated. 本発明にかかる動力伝達装置の別例を示す、拡大的要部断面説明図である。It is an expanded principal part sectional explanatory drawing which shows another example of the power transmission device concerning this invention. 図６に示す動力伝達装置の、要部正面説明図である。It is principal part front explanatory drawing of the power transmission device shown in FIG.

符号の説明Explanation of symbols

１ 動力伝達装置
２ プーリ
２０１ 凹凸部
３ シャフト
４ インナーハブ
４０１ 嵌合凸部
４０２ 回り止め
４０３ 抜け止めかしめ部
４０４ ハブ先端部
４０４１ 円筒部
５ 動力遮断部材
５０１ 螺子部
５０２ フランジ部
５０３ 破断部
５０４ 逃がし部
Ｓ 被駆動軸
ｈ 嵌入口
ｄ 段差部 DESCRIPTION OF SYMBOLS 1 Power transmission device 2 Pulley 201 Uneven part 3 Shaft 4 Inner hub 401 Fitting convex part 402 Anti-rotation 403 Retaining caulking part 404 Hub front-end | tip part 4041 Cylindrical part 5 Power interruption member 501 Screw part 502 Flange part 503 Breaking part 504 Relief part S Driven shaft h Insertion d Stepped part

Claims (7)

動力源と動力的に結合してなるプーリ（２）と、
前記プーリ（２）に接続されて、前記プーリ（２）と一体で回転するインナーハブ（４）と、
前記インナーハブ（４）に嵌合され、被駆動装置のシャフト（３）と螺子結合する動力遮断部材（５）とを有し、
前記プーリ（２）から前記被駆動装置のシャフト（３）へ、前記インナーハブ（４）を介して回転動力を伝達する動力伝達装置（１）であって、
前記インナーハブ（４）は、円筒部を備え、
前記動力遮断部材（５）は、前記円筒部に嵌合され、前記プーリ（２）からの回転力により過度にねじ込まれることで生じる、過大軸力によって分断する破断部（５０４）を備え、
前記インナーハブ（４）と前記動力遮断部材（５）とは、前記インナーハブ（４）の円筒部または前記動力遮断部材（５）の少なくとも一方に塑性加工により形成された回り止め手段（１１）により回り止めされていることを特徴とする動力伝達装置。 A pulley (2) operatively coupled to a power source;
An inner hub (4) connected to the pulley (2) and rotating integrally with the pulley (2);
A power shut-off member (5) fitted into the inner hub (4) and screwed to the shaft (3) of the driven device;
A power transmission device (1) for transmitting rotational power from the pulley (2) to the shaft (3) of the driven device via the inner hub (4),
The inner hub (4) includes a cylindrical portion,
The power shut-off member (5) includes a fracture portion (504) that is fitted to the cylindrical portion and is divided by an excessive axial force generated by being excessively screwed by the rotational force from the pulley (2).
The inner hub (4) and the power shut-off member (5) are anti-rotation means (11) formed by plastic working on at least one of the cylindrical portion of the inner hub (4) or the power shut-off member (5). A power transmission device characterized in that the power transmission device is prevented by rotation. 前記回り止め手段（１１）は、前記インナーハブ（４）と前記動力遮断部材（５）との嵌合箇所において、
前記インナーハブ（４）と前記動力遮断部材（５）いずれか一方に突出形成した回り止め（４０２）と、他方に形成した突状の逃がし部（５０４）とにより構成されることを特徴とする請求項１に記載の動力伝達装置。 The anti-rotation means (11) is at a fitting position between the inner hub (4) and the power cut-off member (5).
The inner hub (4) and the power shut-off member (5) are constituted by a rotation stopper (402) formed so as to protrude from one of the inner hub (4) and the power shut-off member (5), and a protruding relief portion (504) formed on the other. The power transmission device according to claim 1. 前記回り止め（４０２）は、かしめ加工より形成したものであることを特徴とする請求項２記載の動力伝達装置。   The power transmission device according to claim 2, wherein the detent (402) is formed by caulking. 前記シャフト（３）は、前記インナーハブ（４）が接触する座面を備え、
前記動力遮断部材（５）は、螺刻した前記シャフト（３）の外周部に螺着する螺子部（５０１）と、前記インナーハブ（４）の円筒部に嵌合し、前記螺子部（５０１）がねじ込まれると前記インナーハブ（４）に圧接するフランジ部（５０２）とを有し、
前記動力遮断部材（５）は、前記フランジ部（５０２）によって前記インナーハブ（４）を前記シャフト（３）の座面に圧接させることで前記プーリ（２）からの回転動力を前記シャフト（３）に伝達し、
前記破断部（５０４）は、前記螺子部（５０１）とフランジ部（５０２）との間に位置していることを特徴とする請求項１ないし３のいずれか一つに記載の動力伝達装置。 The shaft (3) includes a seating surface with which the inner hub (4) contacts,
The power shut-off member (5) is fitted into a screw part (501) that is screwed onto an outer peripheral part of the screwed shaft (3) and a cylindrical part of the inner hub (4), and the screw part (501) ) And a flange portion (502) that presses against the inner hub (4) when screwed in,
The power shut-off member (5) is configured to apply rotational power from the pulley (2) to the shaft (3) by pressing the inner hub (4) against the seating surface of the shaft (3) by the flange portion (502). ) And
The power transmission device according to any one of claims 1 to 3, wherein the breaking portion (504) is located between the screw portion (501) and the flange portion (502). 前記破断部（５０４）には、切込溝（ｐ）が形成されていることを特徴とする請求項１ないし４のいずれか一つに記載の動力伝達装置。   The power transmission device according to any one of claims 1 to 4, wherein a cut groove (p) is formed in the fracture portion (504). 前記円筒部の先端に、前記動力遮断部材（５）の脱落防止用の抜け止め手段（４０３）を設けたことを特徴とする請求項１ないし５のいずれか一つに記載の動力伝達装置。   The power transmission device according to any one of claims 1 to 5, wherein a retaining means (403) for preventing the power shut-off member (5) from falling off is provided at a tip of the cylindrical portion. 前記抜け止め手段（４０３）は、前記円筒部の表面周縁部に、かしめ加工によって形成した、かしめ抜け止め部であることを特徴とする請求項６記載の動力伝達装置。   The power transmission device according to claim 6, wherein the retaining means (403) is a caulking retaining portion formed by caulking on a peripheral surface portion of the cylindrical portion.
JP2006349506A 2006-12-26 2006-12-26 Power transmission device Expired - Fee Related JP4803022B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004183742A (en) * 2002-12-02 2004-07-02 Gates Unitta Asia Co Pulley with flange
JP2006226320A (en) * 2005-02-15 2006-08-31 Denso Corp Power transmitter
JP2006266376A (en) * 2005-03-23 2006-10-05 Denso Corp Power transmission device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004183742A (en) * 2002-12-02 2004-07-02 Gates Unitta Asia Co Pulley with flange
JP2006226320A (en) * 2005-02-15 2006-08-31 Denso Corp Power transmitter
JP2006266376A (en) * 2005-03-23 2006-10-05 Denso Corp Power transmission device

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