CN2567144Y

CN2567144Y - Pin joint device for crank and pedal

Info

Publication number: CN2567144Y
Application number: CN 02247774
Authority: CN
Inventors: 陈忠义
Original assignee: WELLGO PEDALS CORP
Current assignee: WELLGO PEDALS CORP
Priority date: 2002-09-06
Filing date: 2002-09-06
Publication date: 2003-08-20
Anticipated expiration: 2012-09-06

Abstract

The utility model relates to a pivoted device for cranks and pedals of bicycles. A screw hole is arranged on one end of the crank. The utility model is also provided with a screw sleeve, wherein, the screw sleeve is provided with a screw head, a screw thread section which is in screw connection with the screw hole of the crank mutually, and a through hole which is penetrated along a shaft line direction. A shaft core is pivoted on a pedal plate, the shaft core is provided with a shaft pivoted section which is threaded out from the pedal plate and is penetrated the through hole of the screw sleeve, and the screw hole is arranged in the shaft pivoted section along the shaft line direction. The utility model is provided with a screw bolt, and the screw bolt is provided with a screw thread section which is in screw connection with the screw hole of the shaft core mutually and a pin head with a diameter larger than the diameter of the screw hole of the crank. In this way, because the shaft core is pivoted with the crank in a shaft pivoted mode, the utility model has no problem of directivity restriction on processing and assembly, and simplicity and the convenience on assembly can be increased durning processing.

Description

The hinge device of crank and stretcher

[technical field]

The utility model relates to a kind of crank and stretcher of bicycle, particularly relates to the hinge device of a kind of crank and stretcher.

[background technology]

As shown in Figure 1, Regular Bicycle mainly is to be connected a crank 20 and a stretcher 30 with a core 10.This core 10 is and 30 pivots of stretcher, and has a thread segment 11 that passes stretcher 30, and this crank 20 has an end 22 that forms a screw 21.During assembling, only need the thread segment 11 of axle core 10 and the screw 21 of crank 20 are screwed togather, just can make a core 10 and crank 20 fixed, and stretcher 30 is the state that free turn can Gong trample.

Because the crank 20 that left and right pin is trampled is that mirror concerns with stretcher 30 installing, therefore, discuss with the direction of Fig. 1 arrow 1, the screw 21 of this right crus of diaphragm crank 20 and the thread segment 11 of axle core 10, must screw togather with the C.C.W. hand of spiral, just can guarantee the stretcher 30 that right crus of diaphragm is trampled, can be in the process of crank 20 clockwise direction turns, a core 10 thread segments 11 are screwed with respect to crank 20 screws 21 anticlockwise directions, and do not have the situation that gets loose.Same, discuss with the direction of Fig. 1 arrow 2, the screw 21 of this left foot crank 20 and the thread segment 11 of axle core 10, it must screw togather with the clws hand of spiral, just can guarantee the stretcher 30 that left foot is trampled, can in the process of crank 20 anticlockwise direction turns, a core 10 thread segments 11 be screwed with respect to crank 20 screws 21 clockwise directions, and not have the situation that gets loose.Therefore, though above-mentioned direction can avoid stretcher 30 to get loose, yet it is in processing and install and still have following shortcoming and have to be solved:

At stretcher 30 is with axle core 10 thread segments 11 directly and the situation that screws togather of crank 20 screws 21, crank 20 screws 21 that this left and right pin is trampled and axle core 10 thread segments 11 must have cw and anti-clockwise hand of spiral respectively according to aforementioned reason, this kind must be distinguished the processing and the mounting means of left and right pin, not only can cause the inconvenience in the processing, and can form and install greatest puzzlement.

[utility model content]

The purpose of this utility model is to provide a kind of problem that does not have the directivity restriction, and can improve processing simplification and the crank of property easy to assembly and the hinge device of stretcher.

In order to achieve the above object, the utility model provides the hinge device of a kind of crank and stretcher, and this crank has an end that forms a screw, it is characterized in that: comprising:

One swivel nut has a spiral shell head, one and the thread segment that screws togather mutually of crank screw, and a perforation that runs through along an axis direction;

One wears the axle core of pivot on stretcher, has a pivot section that passes stretcher and run through the swivel nut perforation, and is formed on a screw in the pivot section along axis direction;

One bolt have a thread segment that screws togather mutually with axle core screw, and a footpath is wider than the bolt head of crank screw.

The hinge device of described crank and stretcher is characterized in that: this swivel nut is formed with a polygonal perforation, and the axle pivot section of this core is then corresponding to have polygonal cross-sectional plane.

In sum, feature of the present utility model and effect are: the hinge device of this crank and stretcher includes a swivel nut, a core and a bolt, this swivel nut has a spiral shell head, one thread segment that screws togather mutually with the crank screw, an and perforation that runs through along an axis direction, this core is to wear pivot on stretcher, and has a pivot section that passes stretcher and run through the swivel nut perforation, and be formed on a screw in the pivot section along axis direction, this bolt has a thread segment that screws togather mutually with axle core screw, reach the spiral shell head that a footpath is wider than the crank screw, whereby, because the axle core is to articulate with the mode of axle pivot and crank, therefore, in processing and assembling, do not have the problem of directivity restriction, and the comfort feature that can improve the simplification that adds man-hour and assemble.

Be elaborated below by preferred embodiment and accompanying drawing hinge device to crank of the present utility model and stretcher:

[description of drawings]

Fig. 1 is a three-dimensional exploded view of existing apparatus, illustrates that a core is connected a crank and a stretcher.

Fig. 2 is a three-dimensional exploded view, illustrate the utility model crank and stretcher hinge device one than Cui embodiment.

Fig. 3 is the three-dimensional combination figure of Fig. 2.

Fig. 4 is the cutaway view along Fig. 3 straight line 4-4.

Fig. 5 is a three-dimensional exploded view, illustrates that the utility model second is than Cui embodiment.

[specific embodiment]

As Fig. 2, a crank 40 has an end 42, one stretchers 50 that form a screw 41 and has an axis hole 51.One of the utility model hinge device is to comprise a swivel nut 60, a core 70 than Cui embodiment, and a bolt 80.

This swivel nut 60 has a hexagonal spiral shell head 61, one and the thread segment 62 that screws togather mutually of crank 40 screws 41, and a perforation 63 that runs through along an X-axis line direction.

This core 70 is to wear pivot in the axis hole 51 of stretcher 50, and has a pivot section 71 that passes stretcher 50 and run through swivel nut 60 perforations 63, and is formed on a screw 72 in the pivot section 71 along X-axis line direction.

This bolt 80 has a thread segment 81 that screws togather mutually with axle core 70 screws 72, and a footpath is wider than the bolt head 82 of crank 40 screws 41.

Consult Fig. 3, Fig. 4, during assembling, only need and to screw togather with the thread segment 62 of swivel nut 60 and the screw 41 of crank 40, again the axle pivot section 71 of axle core 70 is worn pivot in the perforation 63 of swivel nut 60, at last, screw togather, the spiral shell head 82 of bolt 80 is resisted against on the crank 40 with the thread segment 81 of bolt 80 and the screw 72 of axle core 70, just can fix shaft core 70, stretcher 50 is articulated with crank 40 be one.

Whereby, because the axle pivot section 71 of axle core 70 does not have direct marriage relation with swivel nut 60, and be subject to bolt 80 and can not rotate, therefore, this core 70 when mounted, not directive restriction, and in the process that stretcher 50 and crank 40 are trampled, this core 70 surely not reverses swivel nut 60, so, when this swivel nut 60 screws togather with crank 40, equally there is not the restriction of directivity yet.

Consult Fig. 5, this swivel nut 60 also can form a polygonal perforation 64, and it is polygonal axle pivot section 73 that 70 in this core cooperates perforation 64 hole shapes to have a cross-sectional plane.Whereby, this core 70 can pass perforation 64 with axle pivot section 73, stretcher 50 and crank 40 are articulated be one, and because axle pivot section 73 is not the relation of screwing togather with perforation 64, therefore, in the process that stretcher 50 and crank 40 are trampled, this core 70 can be subject to polygonal perforation 64 and bolt 80 simultaneously and can not rotate, so this core 70 does not have the restriction of directivity when mounted equally.

Conclude above-mentionedly, the hinge device of crank of the present utility model and stretcher is real to have had following listed advantage and effect:

Because axle core 70 is to obtain the location with bolt 80, and be connected with crank 40 with axle pivot or the mode that fastens, therefore, this swivel nut 60 screws togather with crank 40, and bolt 80 when screwing togather with an axle core 70, do not have the problem of directivity restriction fully, so, respectively this assembly is adding man-hour, as long as produce unimodality just can, and when assembling, do not have the differentiation of left and right pin, and a comfort feature that can effectively improve the simplification that adds man-hour and assemble.

Claims

1, the hinge device of a kind of crank and stretcher, this crank one end is provided with a screw, it is characterized in that: comprising:

One swivel nut, this swivel nut have a spiral shell head, one and the thread segment that screws togather mutually of this crank screw, and a perforation that runs through along an axis direction;

One wears the axle core of pivot on stretcher, and this core has a pivot section that passes this stretcher and run through this swivel nut perforation, and is arranged on a screw in the pivot section along axis direction;

One bolt, this bolt have a thread segment that screws togather mutually with the screw of this core, and a diameter is greater than the bolt head of this crank screwhole diameter.

2, the hinge device of crank as claimed in claim 1 and stretcher is characterized in that: this swivel nut is provided with a polygonal perforation, and the axle pivot section of this core is then corresponding to have polygonal cross-sectional plane.