JP2007192334A - Power transmission mechanism - Google Patents

Power transmission mechanism Download PDF

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Publication number
JP2007192334A
JP2007192334A JP2006011776A JP2006011776A JP2007192334A JP 2007192334 A JP2007192334 A JP 2007192334A JP 2006011776 A JP2006011776 A JP 2006011776A JP 2006011776 A JP2006011776 A JP 2006011776A JP 2007192334 A JP2007192334 A JP 2007192334A
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Prior art keywords
pulley
power transmission
transmission mechanism
bearing
torque
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JP2006011776A
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Japanese (ja)
Inventor
Atsushi Ozawa
篤史 小澤
Isamu Shirai
勇 白井
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Sanden Corp
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Sanden Corp
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Priority to JP2006011776A priority Critical patent/JP2007192334A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a power transmission mechanism for reducing the number of part items of a driven rotary member, for easily radiating heat of from a bearing compared to a power transmission mechanism of a patent document 1. <P>SOLUTION: This power transmission mechanism has a resin pulley rotatably supported by a housing of a rotary apparatus via the bearing and connected to an external driving source via an endless belt, and the driven rotary member joined to the pulley and a main shaft of the rotary apparatus and transmitting rotation of the pulley to the main shaft of the rotary apparatus. The pulley has a driven rotary member joining part and a bearing locking part. The driven rotary member joining part and the bearing locking part are a metallic integral part. The driven rotary member joining part has a torque cutoff mechanism of cutting off the transmission of torque when the torque transmitted to the driven rotary member from the pulley exceeds a predetermined value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、動力伝達機構に関するものである。   The present invention relates to a power transmission mechanism.

回転機器のハウジングに軸受を介して回転可能に支持され無端ベルトを介して外部駆動源に接続された樹脂製プーリーと、プーリーと回転機器の主軸とに結合されてプーリーの回転を回転機器の主軸に伝達する従動回転部材とを備え、インサート成形により軸受の外輪とプーリーとが一体成形され、従動回転部材はプーリーから従動回転部材に伝達されるトルクが所定値を越えるとトルク伝達を遮断するトルク遮断機構を有している動力伝達機構が、特許文献１に開示されている。
特開２００３−０３５３２１号公報 The pulley of the rotating device is supported by a housing of the rotating device through a bearing and rotatably connected to an external driving source through an endless belt, and the pulley and the rotating device main shaft are coupled to the rotation of the pulley. The outer ring of the bearing and the pulley are integrally formed by insert molding, and the driven rotating member is a torque that interrupts the torque transmission when the torque transmitted from the pulley to the driven rotating member exceeds a predetermined value. A power transmission mechanism having a shut-off mechanism is disclosed in Patent Document 1.
JP 2003-035321 A

特許文献１の動力伝達機構には以下の問題点がある。
１．軸受と樹脂製のプーリーとを一体成形すると、樹脂の熱伝導率が金属に比べて小さいため、軸受の発熱を放熱し難く、軸受の耐久性を低下させる。
２．従動回転部材にトルク遮断機構を配設しているので従動回転部材の部品点数が多く製造コストが高い。
本発明は上記問題に鑑みてなされたものであり、特許文献１の動力伝達機構に比べて軸受の発熱を放熱し易く、従動回転部材の部品点数が少ない動力伝達機構を提供することを目的とする。 The power transmission mechanism of Patent Document 1 has the following problems.
1. When the bearing and the resin pulley are integrally formed, the heat conductivity of the resin is smaller than that of the metal, so that it is difficult to dissipate the heat generated by the bearing, and the durability of the bearing is reduced.
2. Since the torque cut-off mechanism is disposed on the driven rotating member, the number of parts of the driven rotating member is large and the manufacturing cost is high.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a power transmission mechanism in which heat generation from a bearing is easily radiated and the number of parts of a driven rotating member is small compared to the power transmission mechanism of Patent Document 1. To do.

上記課題を解決するために、本発明においては、回転機器のハウジングに軸受を介して回転可能に支持され無端ベルトを介して外部駆動源に接続された樹脂製プーリーと、プーリーと回転機器の主軸とに結合されてプーリーの回転を回転機器の主軸に伝達する従動回転部材とを備え、前記プーリーは従動回転部材結合部と軸受係止部とを有し、従動回転部材結合部と軸受係止部とは金属製一体部品であり、従動回転部材結合部はプーリーから従動回転部材に伝達されるトルクが所定値を越えるとトルク伝達を遮断するトルク遮断機構を有していることを特徴とする動力伝達機構を提供する。
本発明に係る動力伝達機構においては、軸受は金属製の軸受係止部を介して樹脂製プーリーに係止しているので、軸受の発熱を金属製の軸受係止部を介して放熱することができる。従って軸受の耐久性は低下しない。トルク遮断機構はプーリーが有する従動回転部材結合部に配設されているので、従動回転部材は部品点数が少なく製造コストが低い。従動回転部材結合部と軸受係止部とを一体部品とすることにより、両者を別部品とする場合に比べて部品点数が低減する。 In order to solve the above-mentioned problem, in the present invention, a resin pulley that is rotatably supported by a housing of a rotating device via a bearing and connected to an external drive source via an endless belt, a pulley, and a main shaft of the rotating device And a driven rotation member that transmits rotation of the pulley to the main shaft of the rotating device, and the pulley has a driven rotation member coupling portion and a bearing locking portion, and the driven rotation member coupling portion and the bearing locking The part is a metal integrated part, and the driven rotary member coupling part has a torque cutoff mechanism that cuts off torque transmission when the torque transmitted from the pulley to the driven rotary member exceeds a predetermined value. A power transmission mechanism is provided.
In the power transmission mechanism according to the present invention, since the bearing is locked to the resin pulley via the metal bearing locking portion, the heat generated in the bearing is radiated through the metal bearing locking portion. Can do. Therefore, the durability of the bearing does not decrease. Since the torque shut-off mechanism is disposed in the driven rotary member coupling portion of the pulley, the driven rotary member has a small number of parts and a low manufacturing cost. By making the driven rotating member coupling part and the bearing locking part as an integral part, the number of parts can be reduced as compared with the case where both parts are separate parts.

本発明の好ましい態様においては、樹脂製プーリーと前記金属製一体部品とがインサート成形により一体成形されている。
従動回転部材結合部と軸受係止部とからなる金属製一体部品と樹脂製プーリーとがインサート成形により一体成形されることにより、前記金属製一体部品を強固に樹脂製プーリーに結合することができる。 In a preferred embodiment of the present invention, the resin pulley and the metal integrated part are integrally formed by insert molding.
The metal integrated part and the resin pulley formed of the driven rotating member coupling part and the bearing locking part are integrally formed by insert molding, so that the metal integrated part can be firmly coupled to the resin pulley. .

本発明の好ましい態様においては、軸受係止部の樹脂製プーリーとの接触部に凹部又は凸部が形成されている。
軸受係止部の樹脂製プーリーとの接触部に凹部又は凸部を形成することにより、インサート成形後の樹脂製プーリーと金属製一体部品との結合が更に強固になる。この結果、トルク遮断機構が作動する前に樹脂製プーリーと金属製一体部品との結合が破綻して、金属製一体部品と樹脂製プリーリーとの間に滑りが発生しトルク伝達が遮断されてしまう事態の発生が防止され、トルク遮断機構によるトルク遮断が確保される。 In a preferred embodiment of the present invention, a concave portion or a convex portion is formed in a contact portion between the bearing locking portion and the resin pulley.
By forming the concave portion or the convex portion in the contact portion of the bearing locking portion with the resin pulley, the connection between the resin pulley after the insert molding and the metal integrated part is further strengthened. As a result, the coupling between the resin pulley and the metal integral part breaks before the torque shut-off mechanism is activated, and a slip occurs between the metal integral part and the resin pulley and the torque transmission is interrupted. Occurrence of the situation is prevented, and torque interruption by the torque interruption mechanism is ensured.

本発明の好ましい態様においては、トルク遮断機構は従動回転部材結合部に形成された脆弱部である。
トルク遮断機構を従動回転部材結合部に形成された脆弱部とすることにより、トルク遮断機構の構成を簡素化することができる。 In a preferred aspect of the present invention, the torque interrupting mechanism is a fragile portion formed in the driven rotating member coupling portion.
By using the torque interrupting mechanism as a weak part formed in the driven rotating member coupling part, the configuration of the torque interrupting mechanism can be simplified.

本発明の好ましい態様においては、前記金属製一体部品は焼結金属製である。
金属製一体部品を焼結金属で作成することにより、複雑な形状でも製造コストを低減できる。 In a preferred embodiment of the present invention, the metal integral part is made of sintered metal.
By manufacturing the metal integral part with sintered metal, the manufacturing cost can be reduced even with a complicated shape.

本発明の好ましい態様においては、前記金属製一体部品は、インサート成形前に表面処理されている。
インサート成形前に、金属製一体部品に亜鉛メッキ、クロムメッキ、ニッケルメッキ等の金属メッキ処理、カチオン塗装、アニオン塗装等の塗装処理等を施して当該部品を表面処理することにより、金属製一体部品の耐食性を向上させることができる。 In a preferred aspect of the present invention, the metal integral part is surface-treated before insert molding.
Before insert molding, the metal integrated part is subjected to metal plating treatment such as galvanization, chrome plating, nickel plating, etc., coating treatment such as cation painting, anion painting, etc. Corrosion resistance can be improved.

本発明の好ましい態様においては、軸受係止部の端面が外部へ露出している。
軸受係止部の端面を外部へ露出させることにより、軸受の発熱が効果的に外部に放熱され、軸受の耐久性が向上する。 In the preferable aspect of this invention, the end surface of the bearing latching | locking part is exposed outside.
By exposing the end face of the bearing locking portion to the outside, the heat generated in the bearing is effectively radiated to the outside, and the durability of the bearing is improved.

本発明の好ましい態様においては、従動回転部材のプーリーとの結合部は板バネである。
従動回転部材のプーリーとの結合部が板バネであれば、従動回転部材結合部に形成した脆弱部が破断してトルク伝達が遮断された時に、板バネに結合した結合部の破断片が板バネの復帰に伴ってプーリーに結合した結合部の破断片から速やかに離れるので、両破断片の干渉による異音の発生や不快なトルクショックの発生を回避できる。 In a preferred embodiment of the present invention, the coupling portion between the driven rotating member and the pulley is a leaf spring.
If the coupling portion of the driven rotating member with the pulley is a leaf spring, when the fragile portion formed in the driven rotating member coupling portion is broken and the torque transmission is interrupted, the broken piece of the coupling portion coupled to the leaf spring is the plate. As the spring returns, it is quickly separated from the broken piece of the coupling portion connected to the pulley, so that it is possible to avoid the generation of abnormal noise and the occurrence of unpleasant torque shock due to the interference of both broken pieces.

本発明の好ましい態様においては、トルク伝達遮断時に、板バネが回転機器の主軸に沿って従動回転部材方向へ戻り、プーリーから離れる。
従動回転部材結合部に形成した脆弱部が破断してトルク伝達が遮断された時に、板バネが回転機器の主軸に沿って従動回転部材方向へ戻り、プーリーから離れることにより、板バネに結合した結合部の破断片とプーリーに結合した結合部の破断片との干渉を確実に回避することができる。 In a preferred aspect of the present invention, when the torque transmission is interrupted, the leaf spring returns toward the driven rotating member along the main shaft of the rotating device and leaves the pulley.
When the weakened portion formed in the driven rotating member coupling portion is broken and the torque transmission is interrupted, the leaf spring returns to the driven rotating member direction along the main axis of the rotating device, and is coupled to the leaf spring by moving away from the pulley. It is possible to reliably avoid interference between the broken part of the coupling part and the broken part of the coupling part coupled to the pulley.

本発明に係る動力伝達機構においては、軸受は金属製の軸受係止部を介して樹脂製プーリーに係止しているので、軸受の発熱を金属製の軸受係止部を介して放熱することができる。従って軸受の耐久性は低下しない。トルク遮断機構はプーリーが有する従動回転部材結合部に配設されているので、従動回転部材は部品点数が少なく製造コストが低い。従動回転部材結合部と軸受係止部とを一体部品とすることにより、両者を別部品とする場合に比べて部品点数が低減する。 In the power transmission mechanism according to the present invention, since the bearing is locked to the resin pulley via the metal bearing locking portion, the heat generated in the bearing is radiated through the metal bearing locking portion. Can do. Therefore, the durability of the bearing does not decrease. Since the torque shut-off mechanism is disposed in the driven rotary member coupling portion of the pulley, the driven rotary member has a small number of parts and a low manufacturing cost. By making the driven rotating member coupling part and the bearing locking part as an integral part, the number of parts can be reduced as compared with the case where both parts are separate parts.

本発明の実施例に係る動力伝達機構を説明する。
図１〜３に示すように、動力伝達機構Ａは、回転機器のハウジング１００に軸受１０１を介して回転可能に支持され、図示しない無端ベルトを介して図示しない外部駆動源に接続された樹脂製プーリー１と、プーリー１と回転機器の主軸１０２とに結合されてプーリー１の回転を回転機器の主軸１０２に伝達する従動回転部材２とを備えている。 A power transmission mechanism according to an embodiment of the present invention will be described.
As shown in FIGS. 1 to 3, the power transmission mechanism A is made of a resin that is rotatably supported by a housing 100 of a rotating device via a bearing 101 and connected to an external drive source (not shown) via an endless belt (not shown). The pulley 1 and the driven rotating member 2 coupled to the pulley 1 and the main shaft 102 of the rotating device and transmitting the rotation of the pulley 1 to the main shaft 102 of the rotating device are provided.

プーリー１は従動回転部材結合部３と軸受係止部４とを有している。従動回転部材結合部３と軸受係止部４とは焼結金属製の一体部品である。樹脂製プーリー１と前記焼結金属製の一体部品とはインサート成形により一体形成されている。前記焼結金属製一体部品は、インサート成形前に、亜鉛メッキ、クロムメッキ、ニッケルメッキ等の金属メッキ処理、カチオン塗装、アニオン塗装等の塗装処理等が施されて表面処理されている。従動回転部材結合部３は、複数の雌螺子部３ａと、雌螺子部３ａを軸受係止部４に接続する放射腕状の脆弱部３ｂとを有している。軸受係止部４はリング状部材であり、軸受１０１の外輪が圧入固定されている。軸受係止部４の両端面は外部に露出している。
従動回転部材２は複数の板バネ５を有している。板バネ５は弾性変形した状態で一端が従動回転部材２にビス止めされ、他端が従動回転部材結合部３の雌螺子部３ａに螺子止めされている。 The pulley 1 has a driven rotating member coupling portion 3 and a bearing locking portion 4. The driven rotating member coupling portion 3 and the bearing locking portion 4 are an integral part made of sintered metal. The resin pulley 1 and the sintered metal integral part are integrally formed by insert molding. Prior to insert molding, the sintered metal integrated part is subjected to a surface treatment by applying a metal plating process such as galvanizing, chrome plating or nickel plating, or a coating process such as cation coating or anion coating. The driven rotation member coupling portion 3 includes a plurality of female screw portions 3 a and a radiating arm-shaped weak portion 3 b that connects the female screw portion 3 a to the bearing locking portion 4. The bearing locking portion 4 is a ring-shaped member, and the outer ring of the bearing 101 is press-fitted and fixed. Both end surfaces of the bearing locking portion 4 are exposed to the outside.
The driven rotating member 2 has a plurality of leaf springs 5. The leaf spring 5 is elastically deformed and has one end screwed to the driven rotating member 2 and the other end screwed to the female screw portion 3 a of the driven rotating member coupling portion 3.

動力伝達機構Ａは、外部駆動源の回転動力を、プーリー１と板バネ５と従動回転部材２とを介して、回転機器の主軸１０２に伝達する。
プーリー１から従動回転部材２に伝達されるトルクが所定値を越えると従動回転部材結合部３の脆弱部３ｂが破断し、プーリー１から従動回転部材２へのトルク伝達を遮断する。図４に示すように、従動回転部材結合部３に形成した脆弱部３ｂが破断してトルク伝達が遮断された時に、板バネ５が回転機器の主軸１０２に沿って従動回転部材２方向へ戻り、樹脂製プーリー１から離れる。 The power transmission mechanism A transmits the rotational power of the external drive source to the main shaft 102 of the rotating device via the pulley 1, the leaf spring 5, and the driven rotation member 2.
When the torque transmitted from the pulley 1 to the driven rotating member 2 exceeds a predetermined value, the fragile portion 3b of the driven rotating member coupling portion 3 is broken and the torque transmission from the pulley 1 to the driven rotating member 2 is interrupted. As shown in FIG. 4, when the weakened portion 3b formed in the driven rotating member coupling portion 3 is broken and the torque transmission is interrupted, the leaf spring 5 returns to the driven rotating member 2 along the main shaft 102 of the rotating device. Then, move away from the resin pulley 1.

動力伝達機構Ａにおいては、軸受１０１は金属製の軸受係止部４を介して樹脂製プーリー１に係止しているので、軸受１０１の発熱を金属製の軸受係止部４を介して放熱することができる。従って軸受１０１の耐久性は低下しない。トルク遮断機構である脆弱部３ｂはプーリーが有する従動回転部材結合部３に配設されているので、従動回転部材２にはトルク遮断機構を設ける必要が無い。従って従動回転部材２は部品点数が少なく製造コストが低い。従動回転部材結合部３と軸受係止部４とを一体部品とすることにより、両者を別部品とする場合に比べて部品点数が減少している。 In the power transmission mechanism A, since the bearing 101 is locked to the resin pulley 1 via the metal bearing locking portion 4, the heat generated by the bearing 101 is radiated through the metal bearing locking portion 4. can do. Therefore, the durability of the bearing 101 is not lowered. Since the fragile portion 3b, which is a torque interruption mechanism, is disposed in the driven rotation member coupling portion 3 of the pulley, it is not necessary to provide the torque interruption mechanism in the driven rotation member 2. Therefore, the driven rotating member 2 has a small number of parts and a low manufacturing cost. By making the driven rotating member coupling part 3 and the bearing locking part 4 as an integral part, the number of parts is reduced as compared with the case where both parts are separate parts.

従動回転部材結合部３と軸受係止部４とからなる金属製一体部品と樹脂製プーリー１とがインサート成形により一体成形されることにより、前記金属製一体部品が強固に樹脂製プーリーに結合されている。
トルク遮断機構を従動回転部材結合部３に形成された脆弱部３ｂとすることにより、トルク遮断機構の構成が簡素化されている。
金属製一体部品を焼結金属で作成することにより、複雑な形状でも製造コストが低減している。
インサート成形前に金属製一体部品を表面処理することにより、金属製一体部品の耐食性が向上している。 The metal integrated part composed of the driven rotating member coupling part 3 and the bearing locking part 4 and the resin pulley 1 are integrally formed by insert molding, whereby the metal integral part is firmly coupled to the resin pulley. ing.
By using the weakening part 3b formed in the driven rotating member coupling part 3 as the torque interruption mechanism, the configuration of the torque interruption mechanism is simplified.
By making a metal integral part with sintered metal, the manufacturing cost is reduced even in a complicated shape.
By surface-treating the metal integrated part before insert molding, the corrosion resistance of the metal integrated part is improved.

軸受係止部４の端面を外部へ露出させることにより、軸受１０１の発熱が効果的に外部に放熱され、軸受１０１の耐久性が向上している。
従動回転部材２の樹脂製プーリー１との結合部が板バネ５なので、図４から分かるように、従動回転部材結合部３に形成した脆弱部３ｂが破断してトルク伝達が遮断された時に、板バネ５に結合した結合部３の破断片が板バネ５の復帰に伴って樹脂製プーリー１に結合した結合部３の破断片から速やかに離れる。この結果、両破断片の干渉による異音の発生や不快なトルクショックの発生を回避できる。
従動回転部材結合部３に形成した脆弱部３ｂが破断してトルク伝達が遮断された時に、板バネ５が回転機器の主軸１０２に沿って従動回転部材２方向へ戻り、樹脂製プーリー１から離れることにより、板バネ５に結合した結合部３の破断片と樹脂製プーリー１に結合した結合部３の破断片との干渉を確実に回避することができる。 By exposing the end face of the bearing locking portion 4 to the outside, the heat generated by the bearing 101 is effectively radiated to the outside, and the durability of the bearing 101 is improved.
Since the coupling portion of the driven rotating member 2 with the resin pulley 1 is a leaf spring 5, as can be seen from FIG. 4, when the fragile portion 3b formed in the driven rotating member coupling portion 3 is broken and the torque transmission is interrupted, The broken piece of the coupling portion 3 coupled to the leaf spring 5 is quickly separated from the broken piece of the coupling portion 3 coupled to the resin pulley 1 as the leaf spring 5 returns. As a result, it is possible to avoid the generation of abnormal noise and the occurrence of unpleasant torque shock due to the interference between both broken pieces.
When the fragile portion 3b formed in the driven rotating member coupling portion 3 is broken and the torque transmission is interrupted, the leaf spring 5 returns to the driven rotating member 2 along the main shaft 102 of the rotating device and separates from the resin pulley 1. Accordingly, it is possible to reliably avoid interference between the broken piece of the coupling portion 3 coupled to the leaf spring 5 and the broken fragment of the coupling portion 3 coupled to the resin pulley 1.

軸受係止部４の樹脂製プーリー１との接触部である軸受係止部４の外周面に、螺旋溝、軸方向に延在する単数又は複数の溝、単数又は複数の凹部、螺旋状突起、軸方向に延在する単数又は複数の突起、単数又は複数の凸部等を形成しても良い。
軸受係止部４の樹脂製プーリー１との接触部であるに軸受係止部４の外周面に凹部又は凸部を形成することにより、インサート成形後の従動回転部材結合部３と軸受係止部４とからなる金属製一体部品と樹脂製プーリー１との結合が更に強固になる。この結果、脆弱部３ｂが破断する前に樹脂製プーリー１と金属製一体部品との結合が破綻して、金属製一体部品と樹脂製プリーリー１との間に滑りが発生しトルク伝達が遮断されてしまう事態の発生が防止され、脆弱部３ｂの破断によるトルク遮断が確保される。 On the outer peripheral surface of the bearing locking portion 4 that is the contact portion of the bearing locking portion 4 with the resin pulley 1, a spiral groove, a single or a plurality of grooves extending in the axial direction, a single or a plurality of recesses, and a spiral protrusion A single or a plurality of protrusions extending in the axial direction, a single or a plurality of protrusions, or the like may be formed.
By forming a concave portion or a convex portion on the outer peripheral surface of the bearing locking portion 4 that is a contact portion of the bearing locking portion 4 with the resin pulley 1, the driven rotating member coupling portion 3 and the bearing locking after the insert molding are formed. The connection between the metal integrated part composed of the portion 4 and the resin pulley 1 is further strengthened. As a result, before the fragile portion 3b breaks, the coupling between the resin pulley 1 and the metal integral part breaks down, and slip occurs between the metal integral part and the resin pulley 1 so that torque transmission is interrupted. Is prevented, and torque interruption due to breakage of the fragile portion 3b is secured.

本発明は、回転機器のハウジングに軸受を介して回転可能に支持され無端ベルトを介して外部駆動源に接続された樹脂製プーリーと、プーリーと回転機器の主軸とに結合されてプーリーの回転を回転機器の主軸に伝達する従動回転部材と、プーリーから従動回転部材に伝達されるトルクが所定値を越えるとトルク伝達を遮断するトルク遮断機構とを備えている動力伝達機構に広く利用可能である。 The present invention relates to a resin pulley that is rotatably supported by a housing of a rotating device via a bearing and connected to an external drive source via an endless belt, and is coupled to a pulley and a main shaft of the rotating device to rotate the pulley. It can be widely used in a power transmission mechanism including a driven rotating member that transmits to the main shaft of a rotating device and a torque blocking mechanism that blocks torque transmission when the torque transmitted from the pulley to the driven rotating member exceeds a predetermined value. .

本発明の実施例に係る動力伝達機構の断面図である。It is sectional drawing of the power transmission mechanism which concerns on the Example of this invention. 図１のＩＩ−ＩＩ矢視図である。It is an II-II arrow line view of FIG. 図１のＩＩＩ−ＩＩＩ矢視図である。It is the III-III arrow line view of FIG. 本発明の実施例に係る動力伝達機構の断面図である。It is sectional drawing of the power transmission mechanism which concerns on the Example of this invention.

符号の説明Explanation of symbols

Ａ 動力伝達機構
１ プーリー
２ 従動回転部材
３ 従動回転部材結合部
３ａ 螺子部
３ｂ 脆弱部
４ 軸受係止部
５ 板バネ
１００ ハウジング
１０１ 軸受
１０２ 主軸 A power transmission mechanism 1 pulley 2 driven rotating member 3 driven rotating member coupling portion 3a screw portion 3b weakened portion 4 bearing locking portion 5 leaf spring 100 housing 101 bearing 102 main shaft

Claims (9)

回転機器のハウジングに軸受を介して回転可能に支持され無端ベルトを介して外部駆動源に接続された樹脂製プーリーと、プーリーと回転機器の主軸とに結合されてプーリーの回転を回転機器の主軸に伝達する従動回転部材とを備え、前記プーリーは従動回転部材結合部と軸受係止部とを有し、従動回転部材結合部と軸受係止部とは金属製一体部品であり、従動回転部材結合部はプーリーから従動回転部材に伝達されるトルクが所定値を越えるとトルク伝達を遮断するトルク遮断機構を有していることを特徴とする動力伝達機構。 The pulley of the rotating device is supported by a housing of the rotating device through a bearing and rotatably connected to an external driving source through an endless belt, and the pulley and the rotating device main shaft are coupled to the rotation of the pulley. The pulley includes a driven rotation member coupling portion and a bearing locking portion, and the driven rotation member coupling portion and the bearing locking portion are metal integrated parts, and the driven rotation member The power transmission mechanism, wherein the coupling portion has a torque cutoff mechanism that cuts off torque transmission when the torque transmitted from the pulley to the driven rotating member exceeds a predetermined value. 樹脂製プーリーと前記金属製一体部品とがインサート成形により一体成形されていることを特徴とする請求項１に記載の動力伝達機構。 The power transmission mechanism according to claim 1, wherein the resin pulley and the metal integrated part are integrally formed by insert molding. 軸受係止部の樹脂製プーリーとの接触部に凹部又は凸部が形成されていることを特徴とする請求項２に記載の動力伝達機構。 The power transmission mechanism according to claim 2, wherein a concave portion or a convex portion is formed in a contact portion between the bearing locking portion and the resin pulley. トルク遮断機構は従動回転部材結合部に形成された脆弱部であることを特徴とする請求項１乃至３の何れか１項に記載の動力伝達機構。 The power transmission mechanism according to any one of claims 1 to 3, wherein the torque interrupting mechanism is a fragile portion formed in the driven rotating member coupling portion. 前記金属製一体部品は焼結金属製であることを特徴とする請求項１乃至４の何れか１項に記載の動力伝達機構。 The power transmission mechanism according to any one of claims 1 to 4, wherein the metal integrated part is made of sintered metal. 前記金属製一体部品は、インサート成形前に表面処理されていることを特徴とする請求項２又は３に記載の動力伝達機構。 The power transmission mechanism according to claim 2 or 3, wherein the metal integrated part is surface-treated before insert molding. 軸受係止部の端面が外部へ露出していることを特徴とする請求項１乃至６の何れか１項に記載の動力伝達機構。 The power transmission mechanism according to claim 1, wherein an end surface of the bearing locking portion is exposed to the outside. 従動回転部材のプーリーとの結合部は板バネであることを特徴とする請求項４に記載の動力伝達機構。 The power transmission mechanism according to claim 4, wherein the coupling portion between the driven rotating member and the pulley is a leaf spring. トルク伝達遮断時に、板バネが回転機器の主軸に沿って従動回転部材方向へ戻り、プーリーから離れることを特徴とする請求項８に記載の動力伝達機構。 9. The power transmission mechanism according to claim 8, wherein when the torque transmission is interrupted, the leaf spring returns toward the driven rotating member along the main shaft of the rotating device and leaves the pulley.
JP2006011776A 2006-01-19 2006-01-19 Power transmission mechanism Pending JP2007192334A (en)

Priority Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009275795A (en) * 2008-05-14 2009-11-26 Sanden Corp Power transmission device
JP2011158002A (en) * 2010-01-29 2011-08-18 Denso Corp Electromagnetic clutch
CN102767608A (en) * 2012-07-25 2012-11-07 武汉正通传动技术有限公司 Synchronous pulley with torque limiter
CN102767607A (en) * 2012-07-25 2012-11-07 武汉正通传动技术有限公司 Synchronous pulley with torque limit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009275795A (en) * 2008-05-14 2009-11-26 Sanden Corp Power transmission device
JP2011158002A (en) * 2010-01-29 2011-08-18 Denso Corp Electromagnetic clutch
CN102767608A (en) * 2012-07-25 2012-11-07 武汉正通传动技术有限公司 Synchronous pulley with torque limiter
CN102767607A (en) * 2012-07-25 2012-11-07 武汉正通传动技术有限公司 Synchronous pulley with torque limit

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