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Tension adjusting device and belt driving type bicycle

A technology of tension adjustment and belt drive, which is applied to chain/belt transmission devices, vehicle components, vehicle gearboxes, etc., which can solve problems such as increased rotation resistance, belt 212 tooth skipping, and heavy bicycles that are difficult to pedal, so as to suppress belt jumping teeth, the effect of improving the response performance

Inactive Publication Date: 2008-02-20
BRIDGESTONE CYCLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, when the torque increases and the tension on the belt 212 is insufficient, the tooth jumping phenomenon of the belt 212 is likely to occur.
[0008]On the other hand, in order to prevent the belt from skipping teeth, it is also considered to apply a higher tension to the belt than usual, but this will increase the rotation resistance and the bicycle will become heavy and difficult to pedal

Method used

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  • Tension adjusting device and belt driving type bicycle
  • Tension adjusting device and belt driving type bicycle
  • Tension adjusting device and belt driving type bicycle

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Embodiment Construction

[0050] Embodiments of the present invention will be described below with reference to the drawings.

[0051] FIG. 1 shows a tension adjustment device 10 used in a belt-driven bicycle 2 as a first embodiment of the present invention. 2 and 3 are perspective views showing main parts of the tension adjustment device 10 . In addition, FIG. 5 is a sectional view taken along line A-A of FIG. 4 .

[0052] As shown in FIG. 1, in this tension adjusting device 10, a rotating shaft 12 is provided on an unillustrated central axis pipe 13 at the lower end of the seat pipe 4 of the belt-driven bicycle 2, and a rotating shaft 12 is provided at both ends of the rotating shaft 12. Cranks 14 extending in opposite directions are respectively connected. The pedal 16 is rotatably supported on the top end of the crank 14 . As shown in FIGS. 2 and 3 , between the left and right cranks 14 is mounted an elliptical drive pulley 18 that rotates integrally with the rotary shaft 12 . The rotating shaf...

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PUM

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Abstract

The invention provides a tension regulating member and belt driven type bicycle, which regulates slack of said belt when the belt driven type bicycle starts to uprise from flat or stops to ascend the driving pulley acted on said axis of rotation. A driving pulley (18) of ellipse is rotablely mounted on a flat fork (6) and a crank (14) connected with both ends of the axis (12) of rotation of said driving pulley. A driven pulley (20) is provided in a pivot (22) of a rear wheel. A belt (24) is wound around the said driving pulley and said driven pulley. A supporting member (30) is asway arranged on the position coaxial with the pivot. The supporting member is provided with tight side arm (30A) extending to the belt tight side and loose side arm (30B)extending to the belt loose side. A tight side idler (32) for contacting with the circumferential og belt is set on the top of the tight side arm, and a loose side idler (34) for contacting with the circumferential og belt is set on the top of the loose side arm.

Description

technical field [0001] The present invention relates to a belt tension adjusting device for a belt-driven bicycle and a belt-driven bicycle having the tension adjusting device. Background technique [0002] Conventionally, a power transmission drive mechanism using a toothed belt wound around a pulley is known as a device for transmitting rotational motion of a crank supporting bicycle pedals to a rear wheel. [0003] For example, as shown in Figure 13, the power transmission drive mechanism is provided with a drive pulley 206 on the rotation shaft 204 of the crank 202, and a driven pulley 210 is provided on the rotation shaft 208 of the rear wheel, and the drive pulley 206 and the driven pulley Pulleys 210 are wound with a toothed belt 212 meshing with them. A tension-side idler 220 and a slack-side idler 222 (for example, refer to Patent Document 1), which respectively press the belt 212 from the outside to the inside, are provided on the support tool 218 rotatably suppor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M9/16
Inventor 武田靖正
Owner BRIDGESTONE CYCLE CO