发明公开
EP2175169A3 Pulley and rolling bearing with resin pulley
有权
Riemenscheibe und Kugellager mit einer Riemenscheibe aus Kunststoff
- 专利标题： Pulley and rolling bearing with resin pulley
- 专利标题（中）： Riemenscheibe und Kugellager mit einer Riemenscheibe aus Kunststoff
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申请号： EP09170782.8申请日： 2009-09-21
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公开(公告)号： EP2175169A3公开(公告)日： 2011-12-07
- 发明人: Nakagawa, Tomokazu , Furukawa, Katumi , Mineno, Katsunori , Hayakawa, Hisashi
- 申请人： NTN Corporation
- 申请人地址： 3-17, Kyomachibori 1-chome Nishi-ku Osaka-shi, Osaka JP
- 专利权人： NTN Corporation
- 当前专利权人： NTN Corporation
- 当前专利权人地址： 3-17, Kyomachibori 1-chome Nishi-ku Osaka-shi, Osaka JP
- 代理机构： Grünecker, Kinkeldey, Stockmair & Schwanhäusser
- 优先权： JP2008260499 20081007; JP2008284202 20081105
- 主分类号： F16H55/48
- IPC分类号： F16H55/48 ; F16C13/00 ; F16H55/40
摘要：
The object is to suppress beating sounds produced while a pulley is rotating in a simple manner at a low cost.
A mold 9 for forming the pulley has gate holes 10 through which resin is injected into the mold 9. Not all of the gate holes 10 have the same diameter, and also, the gate holes 10 are arranged so as to be rotationally asymmetric about the rotation axis of the pulley. Further, a plurality of ribs 7 reinforcing a disk portion 6 disposed between radially inner and outer cylindrical portions 5 and 3 of the pulley are designed such that not all of the ribs 7 have the same thickness. With these arrangements, portions of the resin injected through the respective gate holes 10 reach the portion in the cavity 8 of the mold corresponding to the radially outer cylindrical portion 5 at different times, thus making the outer diameter of the radially outer cylindrical portion 5 rotationally asymmetric. This reduces interference of a plurality of sounds produced from the pulley, thereby suppressing beating sounds.
A mold 9 for forming the pulley has gate holes 10 through which resin is injected into the mold 9. Not all of the gate holes 10 have the same diameter, and also, the gate holes 10 are arranged so as to be rotationally asymmetric about the rotation axis of the pulley. Further, a plurality of ribs 7 reinforcing a disk portion 6 disposed between radially inner and outer cylindrical portions 5 and 3 of the pulley are designed such that not all of the ribs 7 have the same thickness. With these arrangements, portions of the resin injected through the respective gate holes 10 reach the portion in the cavity 8 of the mold corresponding to the radially outer cylindrical portion 5 at different times, thus making the outer diameter of the radially outer cylindrical portion 5 rotationally asymmetric. This reduces interference of a plurality of sounds produced from the pulley, thereby suppressing beating sounds.
公开/授权文献
- EP2175169B1 Pulley and rolling bearing with resin pulley 公开/授权日：2013-11-06
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