CN2139095Y - Single-rod speed variator for bicycle - Google Patents

Abstract

The utility model relates to a single-rod speed variator for a bicycle, which comprises a base having a connection shaft, a moving coil and a stator that are orderly sheathed on the connection shaft and are connected with a centre shaft poking chain stay wire, a shift lever connected with a small flywheel poking chain stay wire, and a cover plate which is covered on the shift lever and is fixed with the base. The utility model has the advantages of small size, low cost and peculiar structure; the centre shaft poking chain and the small flywheel poking chain can be completed by one shift lever; with flexible speed change, the single-rod speed variator for a bicycle is suitable for a racing vehicle or a travelling bicycle.

Description

Single-rod speed variator for bicycle

The utility model relates to a kind of derailleur, particularly relates to a kind of bicycle single pole change-speed box.

Variable speed bicycle all uses two lever change devices at present, i.e. shifter bar operation axis is dialled the chain device and is carried out dialling on the big small tooth plate chain respectively, another root shifter bar operation small flywheel is dialled the chain device and is carried out dialling on five miniature gearss chain, therefore must mix up wherein shifter bar during speed change, and then transfer another root shifter bar, as the underaction that just seems when running into than complex road surface, and two lever change device parts are many, volume is big, the cost height.

The purpose of this utility model is to provide a kind of and utilizes a shifter bar can operate bicycle middle shaft simultaneously to dial the bicycle single pole change-speed box that chain device and small flywheel are dialled the chain device.

The utility model bicycle single pole change-speed box comprises, be provided with the base of adapter shaft, be enclosed within and be connected with axis on the adapter shaft and dial backguy of chain device and rotating moving-coil, one end is enclosed within on the adapter shaft and overlaps on the moving-coil, the other end is fixed on stator with teeth on the base, be enclosed within on the adapter shaft and overlap the shifter bar with teeth that is connected with the backguy of small flywheel chain device on the stator, and the cover plate that overlaps on the shifter bar and fix with base.Wherein be fixed with movable little clamp and steel wire on the moving-coil, the other end of steel wire is connected on the movable little clamp, and its little clamp matches with stator latch and shifter bar latch.

There is tapped bore at the base adapter shaft center of the utility model bicycle single pole change-speed box, is convenient to cover plate and base fixedly the time, and with the moving-coil that is with on the adapter shaft, stator and shifter bar compress by screw.

But fixing and mounting bracket and wire guide plate on the base of the utility model bicycle single pole change-speed box.Erecting frame is used to install this single pole change-speed box, and wire guide plate is used for axis and dials the backguy of chain device and small flywheel and dial chain device backguy guiding.

The transmission principle of the utility model bicycle single pole change-speed box is: Fig. 5 is an incipient state, when clockwise rotating shifter bar, the shifter bar latch withstands little clamp, moving-coil is clockwise rotated simultaneously, forward Fig. 6 position to from Fig. 5 position, axis on the moving-coil is dialled the backguy of chain device blockchain is transferred on the large fluted disc from small tooth plate, this moment is because the curve shape of stator is next with the sub-jack-up of the lesser calorie on the moving-coil, make moving-coil separate (Fig. 6) with shifter bar, moving-coil is dialled under the chain device action of the spring at axis and is rotated to inhour, little clamp when forwarding certain position on the moving-coil just is stuck on the stator latch, makes moving-coil be in the lock state (Fig. 7).To Fig. 8 position, dial the backguy of chain device and blockchain can be transferred to respectively on five miniature gearss of small flywheel, thereby form five kinds of friction speeds respectively with large fluted disc by the small flywheel in this process on the shifter bar from Fig. 6 for the rotation shifter bar.Shifter bar is when Fig. 8 position, the curve shape of shifter bar comes the sub-jack-up of lesser calorie, little clamp is separated with stator, be that moving-coil separates with stator, moving-coil is dialled under the chain device action of the spring at axis and is continued inhour and rotate and get back to initial condition, and the axis on the moving-coil is dialled the backguy of chain device blockchain is transferred to again on the axis small tooth plate.Inhour is rotated shifter bar, promptly returns Fig. 4 position from Fig. 8 position, and the small flywheel in this process on the shifter bar is dialled the backguy of chain device and blockchain can be transferred to respectively on five miniature gearss of small flywheel again, makes it to form five kinds of friction speeds respectively with small tooth plate.Thus, only utilize a shifter bar can reach the purpose of ten kinds of speed of conversion.

The advantage of the utility model bicycle single pole change-speed box is the structure uniqueness, and volume is little, and cost is low, uses a shifter bar can finish that axis is dialled chain and small flywheel is dialled chain, and the speed change fast and flexible is suitable for racing car and mountain bike and uses.

Describe the utility model embodiment in detail below in conjunction with accompanying drawing.

Fig. 1: the utility model front view

Fig. 2: the utility model birds-eye view

Fig. 3: the A-A cutaway view among Fig. 1

Fig. 4: the B-B cutaway view among Fig. 2

Fig. 5: the C-C cutaway view among Fig. 2

Fig. 6-Fig. 8: the utility model fundamental diagram

The utility model single pole change-speed box comprises the base 1 that is provided with adapter shaft 2, be enclosed within and be connected with the moving-coil 4 that axis is dialled chain device backguy 3 on the adapter shaft 2, one end is enclosed within on the adapter shaft 2 and overlaps on the moving-coil 4, the other end is fixed on stator with teeth on the base 15, be enclosed within on the adapter shaft 2 and overlap and be connected with the change connecting rod 7 with teeth that small flywheel is dialled chain device backguy 6 on the stator 5, and, packing ring 15 is arranged between cover plate 11 and the shifter bar by screw 9, bolt 10 and the cover plate 11 that base 1 fixes.Be fixed with movable lesser calorie 12 and steel wire 13 on the moving-coil 4, the other end of steel wire 13 is connected on movable lesser calorie 12.Be fixed with erecting frame 14 and wire guide plate 15 on the base 1.

Claims (3)

1, a kind of bicycle single pole change-speed box, it is characterized in that comprising the base that is provided with adapter shaft, be enclosed within and be connected with axis on the adapter shaft and dial backguy of chain device and rotating moving-coil, one end is enclosed within on the adapter shaft and overlaps on the moving-coil, the other end is fixed on stator with teeth on the base, be enclosed within on the adapter shaft and overlap and be connected with the shifter bar with teeth that small flywheel is dialled the backguy of chain device on the stator, and the cover plate that overlaps on the shifter bar and fix with base, wherein be fixed with movable little clamp and steel wire on the moving-coil, the other end of steel wire is connected on the movable little clamp.

2, bicycle single pole change-speed box as claimed in claim 1 is characterized in that there is tapped bore at the adapter shaft center.

3, bicycle single pole change-speed box as claimed in claim 1 is characterized in that being fixed with on the base plate erecting frame and wire guide plate.

Images