JPH0367749U

JPH0367749U -

Info

Publication number: JPH0367749U
Application number: JP12533789U
Authority: JP
Priority date: 1989-10-26
Filing date: 1989-10-26
Publication date: 1991-07-02

Description

[Brief explanation of the drawing]

第１図は、本考案の実施例を示す、スプロケツ
ト部材とギヤ部材とを備えたアイドルスプロケツ
トの縦断面説明図である。第２図は、第１図に示
すアイドルスプロケツトを装着したエンジンの正
面立面説明図である。第３図は、チエンとスプロ
ケツト部材とがリング部材を介して係合している
状態を示す模式図である。第４図は、スプロケツ
ト部材とギヤ部材とを備えた従来のチエンスプロ
ケツトの縦断面説明図である。ＣＥ……エンジン、２……シリンダブロツク、
３……クランク軸、４……第１バランスシヤフト
、５……第２バランスシヤフト、６……アイドル
スプロケツト、７……第１チエンスプロケツト、
８……第２チエンスプロケツト、１１……チエン
、１２……駆動ギヤ、１３……従動ギヤ、１５…
…ギヤ部材、１６……チエン巻きかけ部、１７…
…スプロケツト部材、１８……本体部、１９……
ボス部、２２……ラバー、２３……支持部、２５
，２６……第１、第２環状溝部、２７，２８……
第１、第２リング部材。 FIG. 1 is an explanatory longitudinal cross-sectional view of an idle sprocket including a sprocket member and a gear member, showing an embodiment of the present invention. FIG. 2 is a front elevational view of the engine equipped with the idle sprocket shown in FIG. 1. FIG. 3 is a schematic diagram showing a state in which the chain and the sprocket member are engaged through a ring member. FIG. 4 is a longitudinal cross-sectional view of a conventional chain sprocket that includes a sprocket member and a gear member. CE...Engine, 2...Cylinder block,
3... Crankshaft, 4... First balance shaft, 5... Second balance shaft, 6... Idle sprocket, 7... First chain sprocket,
8... Second chain sprocket, 11... Chain, 12... Drive gear, 13... Driven gear, 15...
...Gear member, 16... Chain winding part, 17...
... Sprocket member, 18 ... Main body, 19 ...
Boss part, 22...Rubber, 23...Support part, 25
, 26...first and second annular grooves, 27, 28...
First and second ring members.

Claims

[Scope of Claim for Utility Model Registration] A sprocket member having a chain-wrapping portion formed on its outer periphery and annular groove portions formed on both sides of the chain-wrapping portion in the tooth width direction, and a circle forming the bottom surface of the annular groove. A gear member having a drive gear formed on the outer circumference having a circumferential edge portion having a larger diameter than the circumferential surface is integrally formed so that the chain wrapping portion and the drive gear do not overlap in the axial direction of the sprocket member. On the other hand, in a chain sprocket structure in which a ring member is fitted into the annular groove, a part of the inner peripheral surface is in contact with the bottom surface of the annular groove, and a part of the outer peripheral surface is in contact with the chain, the sprocket member is connected to the ring member through an elastic member. A chain sprocket structure characterized in that the sprocket member and the gear member are integrated by coaxially connecting the sprocket member and the gear member.