CN1631711A - Down-press type rotary shaft type folding crank for bicycle - Google Patents

Abstract

The pressive rotary-axed folding crank consist of crank base 1, rotating axis 2, locking spring 3, U-compressive bar guide locking key 4, spring base 5, spring 6, clutch block 7, nut 8. Just by a 90 degrees' rotation around the axis, the pedal will be folded to the same plane with the crank. The whole size of the pedal is concealed inside the narrowest width of 200 millimeters' size of the bike. It is broadly adapted while cooperating with all kinds of bike with pedal and easily operated wile just a press and rotation is needed to folding shift with out any other tools. The folding mechanism is reliable with double-fastening mechanism. This invention is adapted for not only all kinds of folding bike but also normal bike, electromotion bike, power-assisted bike and so on.

Description

Die mould S. A. formula folding crank under the bicycle use

The invention belongs to a kind of bicycle folding crank, particularly belong to a kind of die mould S. A. formula folding crank down.

The present invention is not only applicable to various folding bicycles, also is applicable to ordinary bicycle.

Now, folding bicycle extensively is subjected to liking of people, and people take much count of reducing of bicycle width dimensions, and the distance between the pedal of the left and right sides is in fact just being represented the minimum width dimension of bicycle, about 380 millimeter.At present, do not have folding crank to come out, but have a kind of folding pedals to adapt to this demand.Now, a kind of folding pedals has been arranged in a small amount of application, it is a kind of purpose made folding pedals, thicker than common pedal, upwards move, the tread of pedal and the plane of crank are stacked, like this, just make the distance between pedal reduce to some extent, the thickness of pedal is included, about 300 millimeter.Simultaneously, we know that the power resources of bicycle are in the cyclist, and pedal is that this power is passed to bicycle as far as possible effectively, and therefore, it is a kind of indispensable vitals.In the time of by bike, the cyclist will be below knee, and particularly pin neck and pin are for the revolution that makes crank is being moved flexibly knifeedge.Therefore, pedal must unhinderedly be followed the motion of pin, and abnormality such as slip takes place, and when particularly needing to quicken, this problem is even more important, this shows, the not smooth property of the alerting ability of pedal rotary part and tread is most important.For different car types,, there is different types of pedal to adapt with it with the different requirements of riding.Therefore, folding pedals ground occurs, and is not to solve the preferred approach that the bicycle width reduces.

Purpose of the present invention is intended to propose a best bet, and the size of bicycle width is reduced to minimum.And, can cooperate with various pedals, be fit to various bicycles and use.We know, all bicycle cranks at same in-plane, generally all have two holes, and one is central axis hole, is connected with axis, and one is pedal axle screw, is connected with pedal.Main method of the present invention will be cut off between the central axis hole of crank and the pedal axle screw exactly, and is increased a mechanism, makes the relative central axis hole of pedal axle screw, revolves to turn 90 degrees.

Die mould S. A. formula folding crank under the bicycle use is made up of crank base 1, S. A. 2, jump ring 3, U-shaped pressure lever type guiding bayonet lock 4, spring bearing 5, spring 6, clutch block 7, nut 8.

The explanation of accompanying drawing drawing:

Die mould S. A. formula folding crank assembling scheme drawing under figure (1) bicycle use: crank base 1, S. A. 2, jump ring 3, U-shaped pressure lever type guiding bayonet lock 4, spring bearing 5, spring 6, clutch block 7, nut 8, positioning groove 9, jump ring groove 10, spring eye 11, locating piece 12, central axis hole 13, pedal axle screw 14, S. A. splined hole 15, go up guide pin hole 16, guide pin hole 17, crank base axis 18, S. A. splined hole axis 19 down.

The S. A. of die mould S. A. formula folding crank revolves and turn 90 degrees scheme drawing under figure (2) bicycle use: crank base 1, S. A. 2, U-shaped pressure lever type guiding bayonet lock 4, spring 6, clutch block 7, nut 8, central axis hole 13, pedal axle screw 14, S. A. splined hole 15, last guide pin hole 16, following guide pin hole 17.

Describe the present invention in detail below in conjunction with accompanying drawing:

At first, upper end at crank base 1, the same with common crank form, central axis hole 13 is arranged, the lower end is tobacco pipe shape, at the side of central axis hole 13 90 degree, oblique S. A. splined hole 15 is arranged, and S. A. splined hole axis 19 and crank base axis 18 are the angle (see figure 1) about 45 degree, and the cross-sectional plane of central axis hole 13 is parallel with the elevation profile of S. A. splined hole 15 or be in same plane (see figure 1), with S. A. splined hole 15 is the center, is distributing symmetrically to go up guide pin hole 16, following guide pin hole 17.Then, in the lower end of S. A. 2, pedal axle screw 14 is arranged, there are four uniform positioning grooves 9 at the middle part, and jump ring groove 10 and spring eye 11 are arranged at top, and S. A. 2 is penetrated in the S. A. splined hole 15, it is fixing to put into jump ring groove 10 with jump ring 3, and it can be rotated, and cannot extract out.Spring bearing 5 and spring 6 are nested together, put into the spring eye 11 on the S. A. 2, with U-shaped pressure lever type guiding bayonet lock 4,, penetrate in guide pin hole 16, the following guide pin hole 17 again from the top orientation of S. A. 2, then, press U-shaped pressure lever type guiding bayonet lock 4 with subordinate, top links to each other with spring bearing 5, and makes spring 6 compressions, the bottom is connected with clutch block 7, and is fixing with two nuts 8.Because the antagonistic force of spring 6, make to embed four uniform locating pieces 12 on the clutch block 7 in four uniform positioning grooves 9 in middle part of S. A. 2, and in the spline of corresponding S. A. splined hole 15, and can not break away from.Like this, S. A. 2 no longer can rotate freely and obtain two-fold positioning and fixing (see figure 1).So far, the assembling of die mould S. A. formula folding crank is finished under the bicycle use.Fig. 1 is a die mould S. A. formula folding crank under the bicycle use, folding preceding situation, and the same with common crank, central axis hole 13 and pedal axle screw 14 are in same plane.

Die mould S. A. formula folding crank in use under the bicycle use, on pedal axle screw 14, install pedal, if carry out folding operation, only need press U-shaped pressure lever type guiding bayonet lock 4 downwards, spring 6 is compressed, because the directional tagging of last guide pin hole 16 and following guide pin hole 17, clutch block 7 parallel retreating, make four uniform locating pieces 12 on the clutch block 7, from four uniform positioning grooves 9 in middle part of S. A. 2, and disengage in the spline of corresponding S. A. splined hole 15, at this moment, as long as hold pedal, any direction up or down revolves and turn 90 degrees, but preferably rotates to central axis direction, under the effect of spring 6, clutch block 7 self-returns.At this moment, except S. A. 2 rotated 90 degree, just the same before other each several part position situation and S. A. 2 rotate, so far, the process that pedal is folding was finished.If folding pedal is opened to the use location, identical with the above-mentioned process that pedal is folding, just pedal is spent to contrarotation 90, that's all.

In sum, the purpose that the present invention will deal with problems will be dealt with problems with folding pedal Purpose is the same. But, the method for dealing with problems and effect are completely different. Folding pedal solution Never thickness problem itself, minimum dimension between pedal, comprise about 300 millimeters of pedal thickness, The problem of versatility problem and inconvenient operation. Main feature of the present invention, being only needs to pass through certainly Driving just folds into pedal and crank with 90 degree rotations of rotating shaft on the folding crank of type rotary shaft Same plane, the overall dimension of pedal are hidden into the minimum width dimensions about 200 of bicycle vehicle body In the millimeter; The present invention is scalable, can both be used with various bicycles and various pedal; Easy and simple to handle, folding conversion is as long as a pressure and rotation need not by any instrument; Folding machine The structure good reliability has dual fixed mechanism.

The present invention is not only applicable to various folding bicycles, also be applicable to ordinary bicycle, electronic from Drive a vehicle, help bicycle etc.

Claims (1)

1, die mould S. A. formula folding crank is characterized in that under the bicycle use: be made up of crank base 1, S. A. 2, jump ring 3, U-shaped pressure lever type guiding bayonet lock 4, spring bearing 5, spring 6, clutch block 7, nut 8.Central axis hole 13 is arranged on the crank base 1, the lower end is tobacco pipe shape, spending with central axis hole 13 sides 90, oblique S. A. splined hole 15 is arranged, S. A. splined hole axis 19 and crank base axis 18 are the angle about 45 degree, and the cross-sectional plane of central axis hole 13 is parallel with the elevation profile of S. A. splined hole 15 or be in same plane.With S. A. splined hole 15 is the center, is distributing symmetrically to go up guide pin hole 16, following guide pin hole 17.There is pedal axle screw 14 S. A. 2 lower ends, and there are four uniform positioning grooves 9 at the middle part, and jump ring groove 10 and spring eye 11 are arranged at top.S. A. 2 penetrates in the S. A. splined hole 15, and it is fixing to put into jump ring groove 10 with jump ring 3.U-shaped pressure lever type guiding bayonet lock 4 from the top orientation of S. A. 2, penetrates in guide pin hole 16, the following guide pin hole 17, press down U-shaped pressure lever type guiding bayonet lock 4, top links to each other with spring bearing 5, and makes spring 6 compressions, the bottom is connected with clutch block 7, and is fixing with two nuts 8.Because the antagonistic force of spring 6, make to embed four uniform locating pieces 12 on the clutch block 7 in four uniform positioning grooves 9 in middle part of S. A. 2, and in the spline of corresponding S. A. splined hole 15.