JPS632690U

JPS632690U -

Info

Publication number: JPS632690U
Application number: JP9533386U
Authority: JP
Priority date: 1986-06-24
Filing date: 1986-06-24
Publication date: 1988-01-09

Description

[Brief explanation of the drawing]

第１図は本考案実施の１例を示す一部切断正面
図、第２，４図は同じく要部の正面図、第３図Ａ
，Ｂは同じく要部の一部切断正面図および側面図
である。第５図は従来例を示す一部切断正面図で
ある。図中の符号はそれぞれ下記部材を示す。１：クランク軸、２：玉押片、３：左ワン、４
：右ハンガーワン、５：リテーナ、６：リテーナ
、７：ハンガーパイプ、８：ユニツト固定片、９
：ハンガーリング、１０：シール材、１１：中パ
イプ、１２：コイルスプリング。 Figure 1 is a partially cutaway front view showing one example of implementing the present invention, Figures 2 and 4 are front views of the main parts, and Figure 3A.
, B are a partially cutaway front view and a side view of the main parts. FIG. 5 is a partially cutaway front view showing a conventional example. The symbols in the drawings indicate the following members, respectively. 1: Crankshaft, 2: Ball push piece, 3: Left one, 4
: Right hanger one, 5: Retainer, 6: Retainer, 7: Hanger pipe, 8: Unit fixing piece, 9
: Hanger ring, 10: Seal material, 11: Medium pipe, 12: Coil spring.

Claims

[Claims for Utility Model Registration] 1. A threaded portion is provided on a part of the crankshaft, a cone piece is engaged with the threaded portion, and a cone protrusion is formed on the other part, and the cone piece and A left one and a right hanger one are installed opposite each other through retainers in contact with the protrusions, and a unit fixing piece for pressing the left one is engaged with the other end of the hanger pipe whose one end engages with the right hanger one. a coil spring having both ends engaged with the projection and the cone piece is wound around the crankshaft, and the cone piece which is threadedly engaged with the cone piece when the crankshaft rotates is threaded through the coil spring. 1. A bottom bracket device for a bicycle, characterized in that the bottom bracket device is rotated by the retainer, and as a result, the pressure force applied to the retainer is automatically adjusted. 2. Utility model registration claim 1, wherein an intermediate pipe is interposed between the right hanger one and the left hanger one, and a hanger ring for locking the unit fixing piece is engaged with the hanger pipe. The bicycle bottom bracket device described in . 3. The bottom bracket device for a bicycle according to claim 1, wherein the threaded portion of the crankshaft with which the cone piece engages is an obtuse double thread thread with a thread angle of 120°.