CN86206981U

CN86206981U - Bicycle crank being able to turn inward

Info

Publication number: CN86206981U
Application number: CN 86206981
Authority: CN
Inventors: 马中骏
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-09-14
Filing date: 1986-09-14
Publication date: 1988-05-11

Abstract

The utility model discloses a crank capable of turning 180 DEG itself. The bicycle crank is composed of a fixed piece and a rotary piece realizing shaft hole cooperation, and two fixed pins and a safety lock pin which are combined. The advantages of the crank are that when the bicycle is parked, the bicycle can be locked well by a locking pin after turned 180 DEG; the crane is not only safe (used and operated with the rotatable handle-bar simultaneously), but also can reduce transversal space position; the bicycle is pushed out or in conveniently.

Description

Bicycle crank being able to turn inward

The utility model relates to a kind of bicycle crank, particularly during bicycle parking, and the crank that its pedal can inwardly change.

Existing bicycle crank is an individual part, no matter ride with or park, its bonded assembly pedal all is outwardly directed, occupies certain horizontal space position.Chinese city resident's living conditions at present are not spacious and comfortable, and in the corridor of leaving building in that bicycle has, what have leaves in the room, pushes very inconvenient.In the prior art, the structure of the pedal direction that do not change as yet proposes the utility model for this reason.

Task of the present utility model is the horizontal space position when reducing bicycle storing, makes pedal turnback in making perpendicular to the crank direction, and is opposite with the home position, and (with rotating handlebar and cooperating enforcements) bicycle does not have extension company when pushing.

The utility model is by connecting element and tumbler two parts fixed crank and rotating crank, realizes the axis hole fit structure.

The utility model has the advantages that pedal can inwardly rotate, structure is very simple, has safety device on the handle owing to have, and during bicycle parking, has increased safety.

Structure of the present utility model is provided by following embodiment and accompanying drawing.

Fig. 1 is that Fig. 2 is the left view of Fig. 1 according to the section-drawing of the bicycle crank of utility model proposition.Describe details and service condition in detail below in conjunction with Fig. 1 and Fig. 2 according to the concrete structure that the utility model proposes.

This structure is that connecting element (1) is located by location lock (3) with tumbler (2), is formed by connecting by bearing pin (4), (5).One and half garden shape grooves are arranged on the lock pin (3), and when lock was opened, the half garden shape groove on the lock pin (3) and the garden cylinder of rotating crank (2) matched, and rotating crank (2) is in free position.When any groove on lock pin (3) convex surface and the rotating crank (2) coincide, then rotating crank (2) was in stationary state.

During bicycle storing, earlier locating detent (3) is opened, pedal (6) and crank (2) lock to inside rotation 180 degree along crank shaft then.Form a pedal in the middle of the following pipe and standpipe of vehicle frame.Another pedal is below the vehicle frame center tap.Ride when using bicycle, above repeatedly action gets final product.

Turnback in the bicycle crank (dwindled the lower, transverse locus, with handlebar corner 90 degree, the handlebar lateral extent is consistent with the vehicle body direction, has dwindled the upper lateral locus), bicycle integral body occupies the width that the horizontal space position is saddle and support.

For guaranteeing that crank has enough pulling strengrths, shearing strength value increases its service life, can suitably strengthen the diameter dimension of fixed crank (1).

Related parameter is arranged:

1, fixed crank thickness 25mm, width 32mm, total length 60mm

2, rotating crank total length 168mm, upper end φ 16 * 28mm.

Claims

1, a kind of bicycle rotating crank is characterized in that crank being resolved into connecting element (1) and realizing the axis hole cooperation and in its cooperation place alignment pin (4) and rotary safety detent (3) are housed constituting along the crank (2) of crank axial rotation.

2,, coincide when it is characterized in that having on the rotating crank (2) two and half symmetrical garden shape grooves and lock pin (3) sealed by the device of claim 1.

3, by the device of claim 1 or 2, it is characterized in that one and half garden shape grooves are arranged on the lock pin (3), cooperate with rotating crank (2) when lock pin is opened.

4, by the device of claim 1, it is characterized in that rotating crank (2) top has a cannelure along its axial rotation to cooperate with locating dowel pin (4).