JP2013103507A5

JP2013103507A5 -

Info

Publication number: JP2013103507A5
Application number: JP2011246374A
Authority: JP
Filing date: 2011-11-10
Publication date: 2013-08-01
Anticipated expiration: 2031-11-10

Description

本発明を実施するための形態について、図１ないし図３を基に説明する。本実施の形態にかかるものは、クランクの回転運動を支持するように形成されるクランク軸組立体、すなわち、図３に示すような、車体フレームの下端部に形成された円筒状のハンガー部材９のところに設けられる自転車用クランク軸装置に関するものである。具体的には、図１ないし図３に示す如く、円筒状ハンガー部材９の中心位置に設けられるものであって、その両端部にはクランクが取付けられるとともに、これらクランクの取付けられる内側のところにはベアリング３、３が取付けられるように形成されたシャフト１と、当該シャフト１の外径側に設けられるものであって円筒状の形態からなるとともに、その両端部のところが上記ベアリング３、３を介して上記シャフト１を支持するように形成されたハウジング２と、当該ハウジング２の両端部のところに、間にゴム状弾性体からなるＯリング６、６を介した状態で取り付けられるものであって、全体がカップ状の形態からなるクランプナット５と、からなることを基本とするものである。このような構成からなるものにおいて、上記クランプナット５は、カップ状の形態からなるその底の部分には円盤状のフランジ部５５が形成されるとともに、当該フランジ部５５の上面部のところには垂直状に円筒部５１が形成され、更には、このような円筒部５１の一部には上記ハンガー部材９の両端部に形成された雌ネジ部９５とネジ結合する雄ネジ部５２が設けられるようになっているものである（図３参照）。 A mode for carrying out the present invention will be described with reference to FIGS. 1 to 3. The embodiment relates to a crankshaft assembly formed so as to support the rotational movement of the crank, that is, a cylindrical hanger member 9 formed at the lower end of the vehicle body frame as shown in FIG. The present invention relates to a bicycle crankshaft device. Specifically, as shown in FIG. 1 to FIG. 3 , it is provided at the center position of the cylindrical hanger member 9, and a crank is attached to both ends of the cylindrical hanger member 9. Is provided on the outer diameter side of the shaft 1 to which the bearings 3 and 3 are attached, and has a cylindrical shape. The housing 2 is formed so as to support the shaft 1 and the two ends of the housing 2 are attached with O-rings 6 and 6 made of rubber-like elastic material between them. The clamp nut 5 is basically composed of a cup-like shape. In such a configuration, the clamp nut 5 is formed with a disk-like flange portion 55 at the bottom portion thereof having a cup-like shape, and at the upper surface portion of the flange portion 55. A cylindrical portion 51 is formed vertically, and further, a male screw portion 52 that is screw-coupled with female screw portions 95 formed at both ends of the hanger member 9 is provided in a part of the cylindrical portion 51. (See FIG. 3) .

Claims

A bicycle crankshaft device that is provided at a cylindrical hanger member formed at the lower end of a vehicle body frame and serves to transmit rotational movement from the crank to drive wheels via gears, chains, etc. A shaft formed so that a crank is attached to both ends of the cylindrical hanger member, and a bearing is attached to the inside of the crank. The housing is provided on the outer diameter side of the shaft and has a cylindrical shape, and both ends of the shaft are supported to support the shaft via bearings, and both ends of the housing. However, it is attached with a rubber-like elastic body in between, and the whole is cup-shaped. In addition, a disc-shaped flange portion is formed at the bottom portion of the state, and a cylindrical portion is provided vertically at the flange portion, and the hanger is provided on a part of the cylindrical portion. A crankshaft device for a bicycle, comprising: a clamp nut formed so as to have a male screw portion that is screw-coupled with a female screw portion formed at both ends of the member.

2. The bicycle crankshaft device according to claim 1, wherein at least one of the inner race and the outer race is thin-walled between the shaft and the housing and provided near both ends of the shaft. A thin ball bearing formed in the shape of a ball bearing, and in such a thin ball bearing provided at least at the end on the side where the gear is mounted, a plurality of combined bearing sets A crankshaft device for a bicycle characterized by comprising: