JPH0174990U

JPH0174990U -

Info

Publication number: JPH0174990U
Application number: JP1987171199U
Authority: JP
Priority date: 1987-11-09
Filing date: 1987-11-09
Publication date: 1989-05-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例における自動二輪車
のスイングアーム装置の横断平面図、第２図は同
概略縦断正面図、第３図は同要部拡大縦断正面図
、第４図は片持式スイングアーム兼用のチエーン
カバーの一般的な支持構造の断面図である。２……出力軸、５……ピボツトシヤフト、８…
…車体フレーム、１６，１７……スリーブ、１６
ａ，１７ａ……鍔部、１８，１９……ニードルベ
アリング、２１……チエーンカバー、２４……第
１の筒状フランジ部（筒状フランジ部）、２８…
…車軸。 Fig. 1 is a cross-sectional plan view of a swing arm device for a motorcycle according to an embodiment of the present invention, Fig. 2 is a schematic longitudinal sectional front view of the same, Fig. 3 is an enlarged longitudinal sectional front view of the same main part, and Fig. 4 is a cantilevered swing arm device. FIG. 2 is a cross-sectional view of a general support structure for a chain cover that also serves as a swing arm. 2...Output shaft, 5...Pivot shaft, 8...
...Body frame, 16, 17...Sleeve, 16
a, 17a... Flange portion, 18, 19... Needle bearing, 21... Chain cover, 24... First cylindrical flange portion (cylindrical flange portion), 28...
…axle.

Claims

[Scope of utility model registration request]

In a motorcycle that has a pivot shaft parallel to the output shaft of the engine at the rear of the engine, and transmits power from the output shaft of the engine to the rear axle via this pivot shaft portion, the pivot shaft is fixed to the vehicle body frame, and the pivot shaft is fixed to the vehicle body frame. A pair of cylindrical sleeves having one end abutting each other and having a flange protruding radially outward at the other end are fitted and fixed to the outer periphery of the pivot shaft, and the pivot shaft portion is fitted onto the outer periphery of the pair of sleeves. A cylindrical flange portion at the front end of the chain cover that covers the chain that transmits power to the axle of the rear wheel is fitted in a swingable manner via a plurality of needle bearings, so that the chain cover can be swinged in a cantilevered manner. It is characterized by being configured such that it doubles as an arm, has a swing center aligned with the axis of the pivot shaft, and further restricts movement of the chain cover in the axis direction of the pivot shaft by the flanges of the pair of sleeves. Swing arm device for motorcycles.