CN2273281Y

CN2273281Y - Folding crank for pedal of bicycle

Info

Publication number: CN2273281Y
Application number: CN 96236855
Authority: CN
Inventors: 詹富生; 吴纯标; 江文灿
Original assignee: QILE MULTIFUNCTIONAL BICYCLE CO Ltd SHUNDE CITY
Current assignee: QILE MULTIFUNCTIONAL BICYCLE CO Ltd SHUNDE CITY
Priority date: 1996-04-26
Filing date: 1996-04-26
Publication date: 1998-01-28
Anticipated expiration: 2006-04-26

Abstract

The utility model relates to a square hole folding crank for pedals of bicycles. The utility model comprises a crank head with a square hole, a crank tail with the pedal, a shaft pin, screws, etc. At the time of installation, the square hole of the crank head of can be directly sheathed in the square hole middle shaft of the bicycle, and the universality is strong. When the crank is folded, the crank head and the crank tail can be separated by disassembling screws. The crank tail can rotate around the shaft pinto in order to cause the pedals to move from the outer side of a chain plate to the inner side of the chain plate. The volume of the external shape of the folding bicycle can be reduced, which is convenient to pack and transport.

Description

The folding crank of bicycle step

The utility model relates to the folding crank of bicycle step.

Compacter for the volume after making folding bicycle folding, be easy to carry, present prior art is to make common crank into folding crank, for example, the folding crank on " goddess's board " folding bicycle that Jiangyin, Jiangsu produces.Be to weld a garden shape flange piece in the termination of common garden shape axis, to fix another purpose made u shape part, crank be installed in the middle of the u shape part, they connect by bearing pin, and whole crank can reach folding purpose around the bearing pin rotation.The folding crank of this structure, to supporting knob axis must do special processing, complex structure, the manufacturing cost height can not match with the square toes axis that adopts in the bicycle.

The purpose of this utility model is: provide a kind of simple in structure, can with the common folding crank that the square toes axis is supporting and volume after folding is littler.

Content of the present utility model is: a kind of folding crank of bicycle step comprises pivot pin, step and crank; Crank is divided into crank head and crank tail two parts, and the crank head is provided with and the supporting square hole of square toes axis, and a pivot pin and a screw are housed on the correct position between crank head and the crank tail, makes this two partly do activity or fixing relatively, on the crank tail step is housed.

When this folding crank is installed, the square hole of crank head directly is inserted in square axis gets final product; When bicycle launched to ride, crank head and crank tail fused by screw is fastening, have the function of common crank; When bicycle folding, knockout screw, the crank head separates with the crank tail, and the crank tail rotates around pivot pin, step on the crank tail is become expose into built-in.

Owing to be provided with the square hole structure in the crank head, make it with common square axis can direct supporting use, need not the square shaped axis and do special processing, highly versatile, simple in structure, cost of manufacture reduces, simultaneously because of having adopted crank to be divided into two-part foldable structure, length after making crank folding shortens, and has dwindled the overall volume of bicycle, is convenient to packed and transported.

Fig. 1 is the section-drawing when launching use in the utility model embodiment

Fig. 2 is the section-drawing when folding in the utility model embodiment

Square hole 1 is located on the crank head 3, its effect is directly supporting with bicycle step crank square toes axis, crank head 3 is linked to be a movable integral body with crank tail 6 by pivot pin 2, pivot pin 2 is installed in the next door of close square hole 1 between crank head 1 and the screw 4, handle tail 6 can rotate around pivot pin 2, is equipped with foot-operated 7 on the crank tail 6.During expansion, by screw 4 that crank head 3 is fixing with crank tail 6, can ride this moment, sees Fig. 1.When needing folding dwindling, rotate round handle 5, screw 4 is unclamped, then crank tail 6 is rotated 180 degree around pivot pin 2, like this, step 7 promptly moves to the inboard of chain drum from the outside of chain drum, see Fig. 2, thereby has dwindled the volume after folding bicycle is folding greatly.

Claims

1. the folding crank of a bicycle step comprises pivot pin (2), and step (7) and crank is characterized in that: described crank is divided into crank head (3) and crank tail (6) two parts; Crank head (3) is provided with the square hole (1) supporting with square axis; On the suitable position pivot pin (2) is housed between crank head (3) and the crank tail (6), crank tail (6) can rotate around pivot pin (2); In the middle of crank head (3) and the crank tail (6) screw (4) is arranged, it is movable relatively or fixing that these two parts can be done.

2. the folding crank of bicycle step as claimed in claim 1 is characterized in that: described pivot pin (2) is installed in the next door of close square hole (1) between crank head (1) and the screw (4).