CN1184050A

CN1184050A - Bicycle with speed changing mechanism on rear shaft

Info

Publication number: CN1184050A
Application number: CN 96119192
Authority: CN
Inventors: 刘运柳
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-06
Filing date: 1996-12-06
Publication date: 1998-06-10

Abstract

In the bicycle, rear axle has two sets of gears mounted and the accessory axle has also two sets of gears mounted. During transmission, the free wheel drives one gear on the rear axle, which drives one gear on the accessory axle, and the other gear on the accessory axle drives the other gear on the rear axle to realize output and drive rear wheel. One controllable bevel cam mechanism changes operating gears to realize speed change. The present invention may become optimal substitute of available outer speed changing bicycle.

Description

A kind of rear axle has the bicycle of speed-changing mechanism

The present invention relates to a kind of rear axle has the bicycle of speed-changing mechanism.

The bicycle of existing rear axle energy speed change is at the trailing wheel center, between two floral discs, center on the sun gear on the rear axle, one group of planetary wheel is housed, and ratchet device is arranged, by changing drive path in the both sides of compound planet gear, realize speed change, Fig. 1 is the speed-changing mechanism of existing rear axle variable speed bicycle, 1 rear axle among the figure, 2 sun gears, 3 compound planet gears, 4 right ratchets, 5 left ratchets; This variable speed bicycle, speed change setting range are narrow, can not bear big load, and maintenance is inconvenient, can not reach the function that existing outer variable speed bicycle is possessed.

Purpose of the present invention is that a kind of new rear axle of design has the bicycle of speed-changing mechanism, makes its speed-changing mechanism have the speed ratio setting range and meets or exceeds outer variable speed bicycle at present, overcomes whole shortcomings of outer derailleur again, thus the outer variable speed bicycle of replacement progressively.

The present invention implements like this, on bicycle integral structure basis of invariable, two groups of gears only is installed on rear axle, and each group has a plurality of gears; Be provided with one again and pay axle, pay on the axle and also adorn two groups of gears, the quantity of gear is identical with the number of gears on the rear axle, and promptly pitch wheel is a pair of on the diaxon, and width between centers is equal, but number of teeth difference, every pair is constant-mesh.Each must have on the endoporus garden week of a gear in the gear, and the enterable breach of a plurality of steel balls part is arranged; Same group of jagged gear must be contained on the same axle; (Fig. 3 is paying on the axle, Fig. 4 is on the rear axle) these gears jaggy are to be contained on the hollow shaft, the relevant position of this axle mounting gear is drilled with several halving holes, when adorning these steel balls of a steel ball (or steel column) by surface cam jack-up in each hole, a part enters in the notch gear; What do not eject just ensconces in the hollow shaft; Can only eject the steel ball of a gear position in same group each time.Steerable surface cam is housed in the hollow shaft, and so-called surface cam is the short garden post that all there is oblique shoulder both sides; The quantity of surface cam is generally two, and gear also can for one after a little while.Steerable surface cam is by the effector that is installed on the handlebar, handle by steel cable and relevant other part, therefore the position of mobile surface cam just can head into the part of steel ball in the corresponding notch gear, after being stuck, gear promptly carries out work, transfer torque; Speed change has just been realized in the translating cam position.

Advantage of the present invention is that speed range is wide, and is hermetically sealed, alternative existing outer variable speed bicycle.

The speed changer structure figure of the existing rear axle inner speed change bicycle of Fig. 1;

The local erection plan of Fig. 2 rear axle variable speed bicycle of the present invention;

Fig. 3 rear axle of the present invention has the speed changer structure figure of the bicycle of speed-changing mechanism, one of embodiment;

Two of Fig. 4 embodiment;

The monolithic wheel anastomose composition of Fig. 5 rear axle variable speed bicycle;

Fig. 6 gear cutaway view jaggy;

Fig. 7 is very heavy, the ratchet scheme drawing.

Be described below in conjunction with Fig. 1 to Fig. 6:

Fig. 1 is the speed changer structure figure of existing rear axle inner speed change bicycle; This variable speed bicycle appeared on the market 60 years, because the cost of manufacture height, the performance of light and fast does not all have a large amount of the use decades not as outer variable speed bicycle.

Fig. 2 is the present invention, the local figure of rear axle variable speed bicycle, and 7 is the installation site of change-speed box shown in Figure 3 on bicycle among the figure, 8 width of cloth bars, 9 rear tyres, the chain stay pipe on 10 vehicle frames, 11 are installed in the sprocket wheel on the axis.

Because the daily life tools that bicycle is known for people, this specification sheets will not illustrate the complete vehicle structure figure, and following legend is the part of car load.

Fig. 3 is the present invention, and rear axle has the speed changer structure figure of the bicycle of speed-changing mechanism; 1 rear axle among the figure, 12 pairs of axles, 13 steerable surface cams, 14 steel balls, 15 housings, 16 flywheels shaft, 17 flywheels, 18 left floral discs, 19 right floral discs, A, B, C, D are 4 groups of gears, A, B group has 3 pairs of gears in the present embodiment, C, D group has 2 pairs of gears, the gear number is the product of the two, the quantity of increase and decrease gear mesh has has just increased and decreased the gear number; A group gear is fixed on the flywheel shaft, is driven by flywheel and rotates, and make B group gear follow rotation, but have only steel ball to be ejected the jammed pinion transfer torque by surface cam in the B group; C organizes simultaneously also has a gear to be blocked by steel ball and the rotation simultaneously of B group, thereby drives the rotation of D group, and realizes exporting, its drive path is that the axis sprocket wheel drives flywheel by chain, and flywheel drives the A group, and the A group drives the B group, the C group is rotated simultaneously with the B group, and drives the D group by the C group, drives trailing wheel and advances.

The whole gear cluster of this figure is contained in floral disc one side, and outer variable speed bicycle pagoda gear position, housing are the line of centers foldings of pressing rear axle and paying axle, directly is fastened on the rear axle with screw, also has a fulcrum to be connected with the chain stay pipe on the housing; Sprocket wheel is contained in also can be contained in the outside between two groups of gears; This figure is one of embodiment, is most preferred embodiment.It can be made into individual components, with the supporting use of various vehicles.Present embodiment can also be used in combination with existing commercially available speed gear mounted in rear hub.

Two of Fig. 4 embodiment is the centres that gear cluster are contained in wheel shaft, and left and right sides floral disc is in both sides.Endoporus gear jaggy is to be contained on the flywheel shaft of rear axle, then is drilled with corresponding steel ball mounting hole on the hollow flywheel shaft, and steel ball and steerable surface cam also are contained on the rear axle; Pay the relative fixed then of the gear on the axle; Flywheel then is contained in the outside of gear cluster, and the work drive path is basic identical, but the gear of paying on the axle rotates around rear axle.

Fig. 5 makes a monolithic wheel net with the typical structure of Fig. 3, and 21 is monolithic wheel nets among the figure, and the 22nd, side cover, the part in addition of speed change transmission all is contained in the hole of wheel net, as long as but open just inspection and maintenance of side cover; This monolithic wheel net is specially adapted to BMX (Bicycle Motocross) and folded bicycle.

Fig. 6 is a gear cutaway view jaggy, is that A-A analyses and observe among Fig. 3, Fig. 4, Fig. 5, adopts 3 steel balls among the figure, 6 breach, and breach quantity should be the multiple of steel ball; Breach be shaped as half garden shape.

Fig. 7 is very heavy and the ratchet scheme drawing, is the B-B cutaway view of Fig. 3, Fig. 4, Fig. 5, and is freely brisk when it guarantees bicycle coasting.

The present invention is outside alternative existing variable speed bicycle, and this change-speed box can be used as a kind of bicycle assembly parts production and matches with various passes by-product, for example also can be contained on the Electrical Bicycle auxiliary device when not powering; Also can be used as the best change-speed box of folded bicycle.

Claims

A kind of rear axle has the bicycle of speed-changing mechanism, it is characterized in that two groups of gears are installed on the rear axle, and each group has one or more gears at least; Be provided with one and pay axle, pay on the axle and also adorn two groups of gears, the quantity of gear is identical with the number of gears on the rear axle, and promptly pitch wheel is a pair of on the diaxon, is constant-mesh.Each has the enterable breach of a plurality of steel balls part on the endoporus garden week that a gear must be arranged in the gear; Same group of gear jaggy must be contained on the same axle; These gears jaggy are to be contained on the hollow shaft, and the relevant position of this axle mounting gear is drilled with several halving holes, adorn a steel ball in each hole; Steerable surface cam is housed in the hollow shaft, and the quantity of surface cam is generally two, and gear is used one after a little while.Structural shape difference, the position of hollow shaft are also different, can be to pay axle, also can be flywheels shaft.