JPS59126788U

JPS59126788U - Bicycle gear crankshaft bearing seal structure

Info

Publication number: JPS59126788U
Application number: JP2215083U
Authority: JP
Inventors: 功平丸井
Original assignee: 株式会社マルイ
Priority date: 1983-02-17
Filing date: 1983-02-17
Publication date: 1984-08-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の自転車のハンガ一部の構成を示す部分破
断平面図、第２図は第１図における右側軸受外輪部材の
部分破断拡大図、第３図は従来のシール構造を示す第２
図とは異る右側軸受外輪部材及びシール材を示す部分破
断拡大図、第４図はこの考案の１実施例の右側軸受外輪
部材及びシール材を示す部分破断拡大図である。１・・・ブラケット、２・・・右側軸受外輪部材、３・
・・左側軸受外輪部材、４・・・ペアリンボール、５・
・・ギヤークランク軸（ハンガー軸）、２０・・・右側
軸受外輪部材、２１・・・シール材収容部、２２・・・
シール材。Fig. 1 is a partially cutaway plan view showing the configuration of a part of a hanger of a conventional bicycle, Fig. 2 is a partially cutaway enlarged view of the right bearing outer ring member in Fig. 1, and Fig. 3 is a partially cutaway plan view showing the structure of a conventional bicycle hanger.
FIG. 4 is a partially cutaway enlarged view showing a right bearing outer ring member and a sealing material that are different from those shown in the drawings. FIG. 1... Bracket, 2... Right side bearing outer ring member, 3...
・・Left bearing outer ring member, 4・Pearin ball, 5・
...Gear crankshaft (hanger shaft), 20...Right side bearing outer ring member, 21...Seal material storage part, 22...
Seal material.

Claims

[Scope of utility model registration request]

Each bracket has a male thread on its outer periphery so that it can be screwed into both sides of the bracket, a guide groove for a bearing ball is formed on its inner circumferential surface, and a hole through which a gear crankshaft passes is bored at its outer end. A bearing outer ring member for a bicycle gear crankshaft having an end wall includes a sealing material accommodating portion recessed in the outer surface of the end wall, and a sealing material accommodating portion accommodated in the sealing material accommodating portion and having an inner circumferential surface closely contacting the outer periphery of the crankshaft. A sealing structure for a bearing of a gear crankshaft of a bicycle, comprising a sealing material formed of a rubber-like material so that its outer end surface substantially coincides with the outer surface of the end wall and having a plate-shaped reinforcing metal ring inside.