CN201619661U

CN201619661U - Speed-increase transmission device of bicycle

Info

Publication number: CN201619661U
Application number: CN2009202804079U
Authority: CN
Inventors: 黄鑑淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-04
Filing date: 2009-12-04
Publication date: 2010-11-03
Anticipated expiration: 2019-12-04

Abstract

The utility model relates to a speed-increase transmission device of a bicycle, which belongs to the technical field of bicycle devices. All classes of bicycles which are popular nowadays are all provided with foot pedal cranks, small chain wheels are driven by big chain wheels and chains, the external dimensions are bigger because of the use of a chain mechanism, and especially, the bicycles are restricted when being folded. The utility model has the technical scheme that a sun wheel (11) and a ratchet wheel mechanism of a bicycle are combined into a whole, a back wheel (9) and a planet carrier (14) are fixedly installed on a mandrel (5), an inner tooth ring (12) is fixed on a back right frame (15) of the bicycle, one end of a back left crank (4) and a back right crank (16) is respectively installed on both ends of the mandrel (5), and the other end of the back left crank (4), a left connecting bar (3), a front left crank (2), the back right crank (16), a right connecting bar (17) and a front right crank (19) are mutually hinged to form a group of left four-bar mechanisms and a group of right four-bar mechanism. The utility model has the advantages that the structure is exquisite, and the utility model is suitable for the requirement of speed-increase transmission of a small bicycle with 10 inches.

Description

A kind of bicycle multiplying gear

Technical field

The utility model relates to the bicycle device technical field, is a kind of bicycle multiplying gear more specifically.

Background technology

All kinds of bicycles of current trend, all are pedal cranks, by hinge wheel, chain drives minor sprocket, makes trailing wheel transmission forward, by 26 cun bicycles is example, hinge wheel is 40 teeth, and minor sprocket is 18 teeth, and the over-speed gear ratio that reaches is 40/18=2.22 times, one of two pedal bicycle back and forth advances 4.6 meters, and this is a design-calculated ergonomically.Present problem is, the external diameter of bicycle wheel has only 10 cun, one of pedal still will advance back and forth 4.6 meters (promptly with 26 cun bicycles), the over-speed gear ratio of Yao Qiuing should be 26 cun/10 cun * 2.22=5.8 so, obviously still use link chain mechanism, overall dimensions are just bigger than normal, particularly are restricted when folding.

The modern life high development of current society, popularizing of public transport means and private vehicle, congestion in road is serious day by day, people's trip can be found to get off a little and have suitable stretch journey to finish with walking between the destination, wasting time sometimes though distance is long, to wait next class to incur loss through delay the working () time more sorry especially because difference is unable to catch up with bus in a flash, though now have big wheel bicycle to remedy, go up public transport means but can not be with, can only be placed near the public transport origin station, the tire that exposes to the sun and rain gas leakage, stolen, unreliable dangerous critical moment bungles great matters, also do not have at present a kind of bicycle that installs in the hand baggage that can fold to carry bus tool and other any occasions, the self-appointed bicycle of oneself trip comes out.

Summary of the invention

For overcoming above-mentioned shortcoming, the purpose of this utility model is a kind of bicycle multiplying gear of design.Its technical scheme is: sun wheel and bicycle ratchet device are combined in one, trailing wheel, planetary wheel carrier is fixedly mounted on the mandrel, internally toothed annulus is fixed on behind the bicycle on the right vehicle frame, one end of the right crank of left crank in back and back is installed in respectively on the two ends of mandrel, the other end of the left crank in back, the right crank of left side connecting rod and preceding left crank and back, two groups of four-bar linkages about right connecting rod and preceding right crank are hinged and form, the centre of gration of their preceding left crank and preceding right crank separates, each having an end is arranged on the left and right sides suspension rod on the leading portion vehicle frame and by whisker boom and is supported, on left connecting rod, be equipped with and kick with left heel, on right connecting rod, be equipped with and kick with right heel, satellite gear and internally toothed annulus engagement.The advantage of this utility model is: delicate structure is fit to speedup transmission needs of 10 cun little bicycles, and is convenient to fold and dwindles the bicycle overall dimensions and reach the purpose of carrying.

Description of drawings

Fig. 1 is the speed increasing mechanism scheme drawing, and Fig. 2 is four jointed gear unit scheme drawings, and Fig. 3 is band speed booster driving mechanism bicycle left view, and Fig. 4 is band speed booster driving mechanism bicycle right elevation.In the accompanying drawing: 1, kick with left heel 2, preceding left crank, 3, left side connecting rod, 4, the left crank in back, 5, mandrel, 6, the trailing wheel support tube, 7, the left vehicle frame in back, 8, bearing, 9, trailing wheel, 10, rear-wheel hub, 11, sun wheel, 12, internally toothed annulus, 13, satellite gear, 14, planetary wheel carrier, 15, the right vehicle frame in back, 16, the right crank in back, 17, right connecting rod, 18, kick with right heel 19, preceding right crank, 20, preceding crank shelf, 21, front-wheel, 22, preceding rim brake, 23, front fork and handgrip, 24, axis of orientation, 25, the leading portion vehicle frame, 26, left and right sides suspension rod, 27, back flap hinge, 28, rear wheel frame, 29, the seat saddle, 30, seat pillar, 31, back rim brake, 32, trailing wheel, 33, planet gear speeder, 34, whisker boom.

The specific embodiment

Sun wheel 11 and bicycle ratchet device are combined in one, trailing wheel 9, planetary wheel carrier 14 is fixedly mounted on the mandrel 5, internally toothed annulus 12 is fixed on behind the bicycle on the right vehicle frame 15, one end of left crank 4 in back and the right crank 16 in back is installed in respectively on the two ends of mandrel 5, the other end of the left crank 4 in back, the right crank 16 of left side connecting rod 3 and preceding left crank 2 and back, two groups of four-bar linkages about right connecting rod 17 and preceding right crank 19 are hinged and form, the centre of gration of their preceding left crank 2 and preceding right crank 19 separates, each having an end is arranged on the left and right sides suspension rod 26 on the leading portion vehicle frame 25 and by whisker boom 34 and is supported, this is folding for the ease of bicycle, dwindles the space geometry size.On left connecting rod 3, be equipped with and kick with left heel 1, on right connecting rod 17, be equipped with and kick with right heel 18, satellite gear 13 and internally toothed annulus 12 engagements.One cover NGW type planet circular system is installed in the wheel rim of trailing wheel 32, and sun wheel 11 is captiveed joint with ratchet, and ratchet is captiveed joint with trailing wheel 32, and the rotation of sun wheel 11 is directly passed to trailing wheel 32 promotion bicycles and advanced.Be empty cover in the middle of the sun wheel 11, mandrel 5 passes from its center does not have captive joint mutually, and mandrel 5 is to captive joint with planetary wheel carrier 14.Internally toothed annulus 12 is to be fixed on behind the bicycle on the right vehicle frame 15.Total is that sun wheel 11 is passive, the planetary wheel carrier active, and internally toothed annulus 12 is fixing, constitutes speed increasing mechanism.As long as the number of teeth of sun wheel 11 be internally toothed annulus 12 the number of teeth 1/5 be exactly one six times speed increasing mechanism.Mandrel 5 two ends respectively are fixed with left crank 4 in back and the right crank 16 in back, their space angle is 180 °, before left crank 2, left connecting rod 3, the left crank 4 in back and preceding right crank 19, right connecting rod 17, the right crank 16 in back form independently parallelogram four-bar linkage separately, foot-operatedly kick with left heel 1 and kick with right heel and form the mode that chain gear is removed in transmission from.

Claims

1. bicycle multiplying gear, it is characterized in that: sun wheel (11) and bicycle ratchet device are combined in one, trailing wheel (9), planetary wheel carrier (14) is fixedly mounted on the mandrel (5), internally toothed annulus (12) is fixed on behind the bicycle on the right vehicle frame (15), one end of back left crank (4) and the right crank in back (16) is installed in respectively on the two ends of mandrel (5), the other end of the left crank in back (4), left side connecting rod (3) and preceding left crank (2) and back right crank (16), two groups of four-bar linkages about right connecting rod (17) and preceding right crank (19) are hinged and form, the centre of gration of their preceding left crank (2) and preceding right crank (19) separates, each having the left and right sides suspension rod (26) that an end is arranged on the leading portion vehicle frame (25) goes up and is supported by whisker boom (34), on left connecting rod (3), kick with left heel (1) is installed, on right connecting rod (17), kick with right heel (18) are installed, satellite gear (13) and internally toothed annulus (12) engagement.