CN2434217Y

CN2434217Y - Crank with flywheel

Info

Publication number: CN2434217Y
Application number: CN 00235660
Authority: CN
Inventors: 曾举宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-21
Filing date: 2000-06-21
Publication date: 2001-06-13
Anticipated expiration: 2010-06-21

Abstract

The utility model relates to a crank with a fly wheel. The utility model is composed of a crank body, a big head and a small head. The two structures of a pedal long arm and a specially-made small fly wheel of an original general fly wheel structure are made into a whole. The volume of the fly wheel is reduced, and the stability of pedals of an adjustable bicycle is increased to cause the structure to be simpler, the manufacture to be more convenient and the manufacture cost to be reduced. The utility model has the advantages of reasonable design, simple structure and flexible rotation, and is used for the bicycle with adjustable pedals. The utility model can be matched with multistage sprocket and multistage fly wheel bicycles, and can be suitable for the vehicles with larger load such as tricycles, etc.

Description

The crank of band flywheel

The utility model belongs to a kind of crank with flywheel.

At present, bicycle has of all kinds, and the adjustable pedal of adjustable pedal bicycle comprises two kinds of structures, and a kind of is general flywheel structure, another kind is a spiral steel bowl type flywheel structure, and structure is complicated, and volume is bigger, stable inadequately, cost is higher, and inconvenience is promoted the use of.For example patent 94227876.3 tapping type bicycle cranks, patent 94246724.8 bicycle hollow cranks, patent 96221796.4 bicycle fluted disc cranks etc. are also failed to improve the stability of bicycle pedal and are reduced cost of manufacture again.

The purpose of this utility model provides a kind of crank with flywheel, two kinds of structures of the long-armed and special small flywheel of pedal in the original general flywheel structure are united two into one, dwindle the volume of flywheel structure, increase the stability of adjustable bicycle pedal, make structure more simple, make more conveniently, reduce cost of manufacture greatly.

The utility model is made up of crank body, major part, microcephaly, crank body (1) connects major part (2) and microcephaly (3), major part is a flywheel that does not have sprocket, in overcoat (4), flat retaining (5), fuse (6), retaining silk (7), a steel ball (8), very heavy (9), very heavy spring (10) are housed, one end of the outer rim of overcoat (4) and crank body (1) is fastening, fuse has screw thread in (6), and the other end of crank body (1) has microcephaly (3), and microcephaly (3) has central axis hole (11), pin-and-hole (12).

The utility model is reasonable in design, and is simple in structure, rotates flexibly, is used for adjustable pedal bicycle, and it can be used with the multistage flywheel bicycle of multi-chain gear wheel, also is applicable to the bigger car types of bearing a heavy burden such as three-wheel vehicle.

Description of drawings:

Fig. 1 is the utility model front view;

Fig. 2 is the utility model birds-eye view.

The utility model is that the long-armed and two kinds of structures of purpose made small flywheel of the pedal in the original Regular Bicycle flywheel structure are united two into one, at Fig. 1, in 2, microcephaly's structure is identical with general crank with size, major part is a flywheel structure, skin is made colyliform, promptly remove general flywheel structure Central Plains sprocket partly, with the flywheel volume-diminished, then with Case of fly-wheel outer rim and crank body one end firm engagement, other parts in the flywheel are as flat retaining, fuse, very heavy, very heavy spring, silk retaining and steel ball etc. are kept intact, and be just that flywheel fuse and Case of fly-wheel is scaled to suitable dimension.Be shaped on screw thread on the internal diameter of fuse, this is the same with general crank.Central axis hole and pin-and-hole are arranged on the microcephaly of the other end of crank body, connect with axis with pin.The utility model divides left and right two kinds of structures, and right side fuse internal diameter is shaped on right-hand thread, and left side fuse internal diameter is shaped on left-hand thread.Pedal the galianconism axle at the inline pin of fuse, just the same with the effect of other two kinds of flywheel structures in the adjustable pedal, it also only allows the pedal galianconism wheel construction that is diversion to rotate towards a direction, be that the right side pedal is only done the counterclockwise rotation, the left side pedal only rotates clockwise, as cyclist during to the pedal application of force, the effect that can obtain to prolong the pedal effective length equally and increase total propulsive effort.

Claims

1, a kind of crank with flywheel, form by crank body, major part, microcephaly, it is characterized in that: crank body (1) connects major part (2) and microcephaly (3), major part is a flywheel that does not have sprocket, in overcoat (4), flat retaining (5), fuse (6), retaining silk (7), a steel ball (8), very heavy (9), very heavy spring (10) are housed, one end of the outer rim of overcoat (4) and crank body (1) is fastening, fuse has screw thread in (6), the other end of crank body (1) has microcephaly (3), and microcephaly (3) has central axis hole (11), pin-and-hole (12).

2, according to the crank of the described band flywheel of claim 1.It is characterized in that: crank divides left and right two kinds, and right side fuse (6) internal diameter has right-hand thread, and left side fuse (6) internal diameter has left-hand thread, connects bicycle pedal galianconism axle in the fuse (6).