CN2208539Y

CN2208539Y - Stepless speed-change device for bicycle

Info

Publication number: CN2208539Y
Application number: CN 94221275
Authority: CN
Inventors: 谢恩如
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-09
Filing date: 1994-09-09
Publication date: 1995-09-27
Anticipated expiration: 2004-09-09

Abstract

The utility model relates to a stepless speed-changing device for a bicycle, which comprises a first friction wheel and a second friction wheel which are respectively arranged on a bicycle in a rotational way and respectively provided with a wheel casing. A supporting rod is arranged between the two wheel casings, a roller can be rotationally and slidingly arranged on the supporting rod, and the roller is arranged between the two friction wheels. The roller and the two friction wheels form friction contact. A shifting device can be used for shifting the roller to cause the roller to move along the supporting rod, so that the roller can move along the radial direction of the two friction wheels. The stepless speed-changing device for a bicycle can be used to change the driving speed of the second friction wheel driven by the first friction wheel.

Description

Stepless speed-change device for bicycle

The utility model relate to a kind of can free conversion bicycle speed and stepless speed variator for bicycle simple in structure.

Please referring to shown in Figure 5, be a kind of known multi-change speed bicycle, its transmission system includes several pieces variable gears and is arranged on the rear vehicle shaft, and a control mechanism can be bonded to chain on wherein any one variable gear, so that the speed of conversion bicycle.Yet this transmission system of commonly using includes very complicated structure, and not only manufacturing cost is high for it, and a little less than its competitive power also becomes considerably.

The purpose of this utility model is to provide a kind of stepless speed variator for bicycle of brand-new structure, and its simple structure can reduce manufacturing cost widely.

For achieving the above object, the stepless speed variator for bicycle that the utility model provides comprises that one first friction wheel and one second friction wheel are erected at respectively on the bicycle rotationally, and it respectively has a hub; One steady arm is arranged between this two hub; One roller reaches rotationally and is slidably disposed on this steady arm, and its be arranged between this two friction wheel and and this two friction wheel form wipe contact; And one striking gear can be used for stirring this roller and move along this steady arm so that can upwards move, and then can be used for this first friction wheel of conversion and drive the actuating speed of this second friction wheel in the footpath of this two friction wheel.

This second friction wheel is provided with a sprocket wheel, so that can be gone to drive the sprocket wheel that another is arranged on trailing wheel by a chain, rotates and can drive trailing wheel.

This striking gear comprises that a throw rod can be parallel to this steady arm and move, and this throw rod one end is provided with a pair of intermediate plate can make that can order about roller when this throw rod moves moves along this steady arm for clamping this roller.

The other end of this throw rod links to a rope place, and this rope then links to a knob, can order about this roller by this throw rod and intermediate plate when making this knob and move along steady arm.

Now with a preferred embodiment, conjunction with figs. illustrates structure of the present utility model, feature and operation.

Fig. 1 is the lateral plan of a bicycle, and wherein this bicycle is provided with one according to stepless speed variator for bicycle of the present utility model;

Fig. 2 is the schematic perspective view of this stepless speed variator for bicycle;

Fig. 3 is the plan sketch of this stepless speed variator for bicycle;

Fig. 4 is a side schematic view, and it shows the diagram of work of this stepless speed variator for bicycle;

Fig. 5 is a side schematic view that uses the bicycle of traditional step by-step variable gear.

Please referring to Fig. 1 to 3, this stepless speed variator for bicycle comprises that one first friction wheel 10 and one second friction wheel 30 can be erected at above two

hubs

11,31 respectively rotationally, wherein, the axletree of stretcher 40 can be supported in above the hub 11 rotationally, and itself and this first friction wheel 10 are fixed together, and rotate and can drive first friction wheel 10; 30 of this second friction wheels can be erected on another hub 31 rotationally, and place, the periphery of this second friction wheel 30 sets firmly a sprocket wheel 32, so that can be removed to drive a sprocket wheel 34 that is erected at the hind axle place and can be driven the trailing wheel rotation by chain 33.

A steady arm 12 is installed between this two

hub

11,31, and a roller 13 can rotationally and can be arranged on the steady arm 12 movably; A carriage 14 is arranged on this hub 11; One throw rod 15 can be erected at above this carriage 14 slidably and can be parallel to this steady arm 12 and move; These throw rod 15 1 ends are provided with a pair of clamping plate 16 just can clamp this roller 13, does axial displacement action so that can stir this roller 13 on steady arm 12; The other end of this throw rod 15 utilizes a screw 18 and fixes a block 19; A wherein end of one rope 20 utilizes another screw 21 and is fixed on this block 19; One tension spring 17 is arranged between carriage 14 and the block 19, so that can be with the direction pulling of throw rod 15 and roller 13 past hubs 31; Must be noted that wherein the diameter of roller 13 is designed to just can be arranged between this two

friction wheel

10,30, make this two

friction wheel

10,30 to drive each other and rotate by this roller 13.

Please referring to Fig. 4, the other end of this rope 20 links on the knob 22, and this knob 22 is arranged on for example bicycle handle, and is preferably disposed on the place that the cyclist can be easy to pull; This knob 22 is designed so that throw rod 15 to be turned left when it rotates or right pulling, and this knob can be fixed on any position, makes throw rod 15 can drive this roller 13 and move to any suitable position on steady arm 12.Wherein, for example, this knob is toward the anticlockwise motion time, and it can order about throw rod 15 toward moving right, and when this knob rotated toward clockwise direction, this spring 17 can retract original position with the direction on the roller 13 past left sides.Wherein, this knob 22 can utilize any way to be located, so that these roller 13 location can be lived.

Please referring again to Fig. 3, when roller 13 is turned right, that is when moving toward the direction of hub 11, it is the radially inner side of migration friction wheel 10, that is more near the circle centre position of friction wheel 10, the rotating speed that makes friction wheel 10 drive rollers 13 also slows down; And at the same time, this roller 13 is the radial outside of another friction wheel 30 of migration, makes its rotating speed that orders about friction wheel 30 rotations also just slow, so move on the more past the right of roller, the road speed of bicycle is also just slow.Otherwise, when knob 22 clockwise rotates, make spring 17 with roller 13 past left dislocations, that is when driving toward the direction of another hub 31, the radial outside place of its more close friction wheel 10, and it is more near the radially inner side place of another friction wheel 30, so it can order about friction wheel 30 and does fast speed and rotate.

Claims

1, a kind of stepless speed variator for bicycle is characterized in that comprising that one first friction wheel and one second friction wheel are erected at respectively on the bicycle rotationally, and it respectively has a hub; One steady arm is arranged between this two hub; One roller can reach rotationally and can be slidingly arranged on this steady arm, and its be arranged between this two friction wheel and and this two friction wheel form wipe contact; And one striking gear be used for stirring this roller and move along steady arm, promptly upwards move, and then can be used for this first friction wheel of conversion and drive the actuating speed of this second friction wheel in the footpath of this two friction wheel.

2, stepless speed variator for bicycle as claimed in claim 1 is characterized in that: this second friction wheel is provided with a sprocket wheel, removes to drive the sprocket wheel that another is arranged on trailing wheel by a chain, and then drives the trailing wheel rotation.

3, stepless speed variator for bicycle as claimed in claim 1, it is characterized in that: this striking gear comprises that one is parallel to the throw rod that this steady arm moves, this throw rod one end is provided with one for the intermediate plate of clamping this roller, and this throw rod orders about roller and moves along this steady arm when moving.

4, stepless speed variator for bicycle as claimed in claim 3, it is characterized in that: the other end of this throw rod links to a rope place, this rope then links on the knob, can order about this roller by this throw rod and intermediate plate in the time of this knob and move along this steady arm.

5, stepless speed variator for bicycle as claimed in claim 3 is characterized in that: a spring that this intermediate plate can be promoted toward a certain direction is set on this throw rod.