CN203497114U

CN203497114U - Easily-detachable bicycle crank connecting structure

Info

Publication number: CN203497114U
Application number: CN201320495371.2U
Authority: CN
Inventors: 肖建明
Original assignee: TAICANG HAOHU HARDWARE PRODUCT Co Ltd
Current assignee: TAICANG HAOHU HARDWARE PRODUCT Co Ltd
Priority date: 2013-08-14
Filing date: 2013-08-14
Publication date: 2014-03-26
Anticipated expiration: 2023-08-14

Abstract

The utility model relates to the field of bicycle fittings, in particular to an easily-detachable bicycle crank connecting structure, which comprises a bicycle crank, a middle axle screw and a locking cover, wherein the bicycle crank is fixed on a frame body through a clockwise thread of the middle axle screw and a ridge hole of the bicycle crank; the bicycle crank is fixed together with the locking cover through an anticlockwise thread. The easily-detachable bicycle crank connecting structure has the beneficial effects of simple structure, one-time installation, random detachment and no need of special sprocket detaching tools.

Description

A kind of quick detachable bicycle crank connection structure

Technical field

The utility model relates to bicycle accessories technical field, is specifically related to a kind of quick detachable bicycle crank connection structure.

Background technology

The feature of commercially available chain wheel crank is that crank position of cap is that cw screws in, after axis screw (outer tooth axis nut) is locked, with plastic closure, seal waterproof to follow increase attractive in appearance, the time standby special use of dismounting chain wheel and crank is torn chain wheel instrument open and is locked in the positive tooth of crank square hole position, then the thimble of tightening tool part ejects crank from the square hole of axis, this way shortcoming be must be equipped with special tool could dismantle chain wheel crank, if if the tooth line in addition above crank is used and too much to cause stripped thread this is just difficult to take apart.

Utility model content

The purpose of this utility model is for the defect of prior art and deficiency, provides a kind of simple in structure, the quick detachable bicycle crank connection structure of long service life.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of quick detachable bicycle crank connection structure described in the utility model, comprise bicycle crank, it also comprises axis screw, tightening cover, described bicycle crank is fixed on vehicle frame by the cw screw thread of axis screw and the stupefied hole of itself, and bicycle crank and tightening cover are fixed together by conter clockwise screw thread.

Further, the screw thread end opposite of described axis screw is provided with waterproof step, is provided with interior hexagonal hole in waterproof step.

Further, described tightening cover is provided with the circular hole matching with waterproof step.

Adopt after said structure, the utility model beneficial effect is: the utility model is simple in structure, and disposable installation can arbitrarily be dismantled, without special dismounting crank instrument.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical solution of the utility model, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is crank construction for bicycle schematic diagram of the present utility model;

Fig. 2 is axis screw structural schematic diagram of the present utility model;

Fig. 3 is tightening cover structural representation of the present utility model;

Fig. 4 is integral installation structural representation of the present utility model.

Description of reference numerals:

1, bicycle crank; 11, stupefied hole; 2, axis screw; 21, waterproof step; 22, interior hexagonal hole; 23, cw screw thread; 3, tightening cover; 31, through hole; 32, the anti-pitch thread of conter clockwise.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, a kind of quick detachable bicycle crank connection structure described in the utility model, comprise bicycle crank 1, axis screw 2, tightening cover 3, described bicycle crank 1 is fixed on vehicle frame body by the cw screw thread 23 of axis screw 2 and the stupefied hole 11 of itself, bicycle crank 1 is fixed together by the anti-pitch thread 32 of conter clockwise with tightening cover 3, the screw thread end opposite of described axis screw 2 is provided with waterproof step 21, in waterproof step, be provided with interior hexagonal hole 23, described tightening cover 3 is provided with the through hole 31 that can pass inner-hexagon spanner matching with waterproof step 21, when being installed, bicycle crank 1 via this through hole 31, waterproof screw 2 use inner-hexagon spanners are fixed on above axis.

When the utility model is dismantled bicycle crank 1 when needs, do not need to tear open axis Specialized tail stock instrument, only need the inner-hexagon spanner of original routine, through the through hole that can insert inner-hexagon spanner 31 reserved on tightening cover 3, directly conter clockwise eases out waterproof screw 2, after contacting with tightening cover 3, the step of waterproof screw 2 drive tightening cover anticlockwise direction stressed, because tightening cover is that conter clockwise screws in, so can only be toward the direction motion of tightening cover locking while being subject to the spin of conter clockwise, when will exiting, axis screw 2 can only drive bicycle crank 1 to send outward by tightening cover 3, so bicycle crank 1 just follows the back-out of axis screw 2 to disassemble together, so just without special tool, can complete, for convenience detach.

The above is only better embodiment of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.

Claims

1. a quick detachable bicycle crank connection structure, comprise bicycle crank (1), it is characterized in that: it also comprises axis screw (2), tightening cover (3), described bicycle crank (1) is fixed on vehicle frame body by the cw screw thread (23) of axis screw (2) and the stupefied hole (11) of itself, and bicycle crank (1) is fixed together by the anti-pitch thread of conter clockwise (32) with tightening cover (3).

2. a kind of quick detachable bicycle crank connection structure according to claim 1, is characterized in that: the screw thread end opposite of described axis screw (2) is provided with waterproof step (21), is provided with interior hexagonal hole (22) in waterproof step (21).

3. a kind of quick detachable bicycle crank connection structure according to claim 2, is characterized in that: described tightening cover (3) top is provided with the through hole (31) that can pass inner-hexagon spanner matching with waterproof step (21).