CN2278797Y

CN2278797Y - Chain wheel having chaining function

Info

Publication number: CN2278797Y
Application number: CN 96202856
Authority: CN
Inventors: 苏伯林
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-14
Filing date: 1996-02-14
Publication date: 1998-04-15
Anticipated expiration: 2006-02-14

Abstract

The utility model relates to a chain wheel having chaining function. A plurality of groups of difficult engaging teeth 11 and a plurality of groups of easy engaging teeth 12 are uniformly distributed on the wheel disc of the chain wheel; the difficult engaging teeth and the easy engaging teeth are orderly arranged by equidistance; a plurality of equidistant inducing surfaces 13 are arranged at the position near rim the front face of the wheel disc; the tooth height of the first easy engaging tooth of each group of easy engaging teeth is less than the tooth height of other easy engaging teeth. The utility model has the advantages of high chaining efficiency, low driving noise, low manufacture cost.

Description

Sprocket wheel with cochain function

The utility model relates to a kind of sprocket wheel with cochain function, and this sprocket wheel mainly is used on the flywheel of speed changing bicycle.

The different sprocket wheel of a plurality of diameters is arranged in the flywheel of common speed changing bicycle, for the ease of in the middle governing speed of advancing, chain need be switched on the hinge wheel from minor sprocket, or on chain switched secondary minor sprocket from hinge wheel, shown in the accompanying drawing 5 is a kind of sprocket wheel in the prior art, accompanying drawing 6 is worm's eye views of accompanying drawing 5, the difficult engaging tooth 31 of uniform many groups on this Chain wheel plate 30, the easy engaging tooth 32 of many groups, difficult engaging tooth and easy engaging tooth are equidistantly arranged successively, there are a plurality of equidistant faces 33 of inducing at the positive nearly wheel rim place of wheel disc, this induces face one end to extend to the first easy engaging tooth place, and join with the first easy engaging tooth 320, when speed change, its chain 40 realizes that under the mating reaction of inducing face and easy engaging tooth chain switches to the effect of the cochain on the hinge wheel from minor sprocket, yet, each tooth of this sprocket wheel all has equal tooth depth, the first easy engaging tooth can produce inhibition to chain in the process of cochain, if being 41 chains of outer chain sheet of chain, the part of cochain must extend the higher first easy engaging tooth that just can stride across, yet the inevitable speed that reduces cochain relatively of extended height, in addition, if the part of cochain is the inner chain sheet 42 of chain, then the first easy engaging tooth can be against the outer side surface of inner chain sheet and produce touch the mill and noise, in order to address the above problem, measure commonly used is to be processed into the first easy engaging tooth tilting and to have the structure of angle of clearance, this structure will be to causing bigger difficulty in the processing, not only mould and manufacture cost height, and the up-to-standard rate of product is also lower.

The purpose of this utility model is to propose a kind of cochain efficient height that has, and the transmission noise is little, the sprocket wheel of low cost of manufacture.

The purpose of this utility model is achieved in that a kind of sprocket wheel with cochain function, uniform many difficult engaging tooths of group and the easy engaging tooth of many groups on this Chain wheel plate, difficult engaging tooth and easy engaging tooth are equidistantly arranged successively, there are a plurality of equidistant faces of inducing at the positive nearly wheel rim place of wheel disc, and the tooth depth of the first easy engaging tooth in every group of easy engaging tooth is lower than other easy engaging tooth.Behind the utility model composition speed changing bicycle flywheel, just can realize the function of cochain under the control of speed changer, during use, speed changer is stirred chain, its local deflection is moved, hinge wheel from the minor sprocket sidesway to opposite side, when chain sidesway to the first easily during engaging tooth, because of the height of this tooth lower, this chain can not touch this tooth, just can successfully move to each corresponding easy engaging tooth directly over, and then be engaged with, thereby reach the effect of cochain.

Compared with the prior art the utility model has following advantage:

1, because of the first easy engaging tooth is lower, can make the smooth sidesway cochain of chain, can not produce any obstruction, improve cochain speed, thereby cochain efficient height;

2, since chain in the process of cochain sidesway, the first easy engaging tooth no longer directly touches with it, thereby can avoid producing noise;

3, the utility model only needs the first easy engaging tooth height is reduced, and just can realize cochain efficient height, the effect that noise is low, has reduced the mould investment, has improved product percent of pass, has reduced processing cost.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1, structural representation of the present utility model

Fig. 2, partial enlarged drawing of the present utility model

The worm's eye view of Fig. 3, Fig. 2

Fig. 4, another kind of transmission schematic representation of the present utility model

Sprocket wheel schematic representation in Fig. 5, the prior art

The worm's eye view of Fig. 6, Fig. 5

Referring to accompanying drawing, difficult engaging tooth 11 of uniform many groups and the easy engaging tooth 12 of many groups on wheel disc 10 of the present utility model, several continuous difficult engaging tooths or several continuous easy engaging tooths are arranged in every group, difficult engaging tooth and easy engaging tooth are equidistantly arranged successively, promptly every several continuous difficult engaging tooths, and then be exactly several easy engaging tooths, there are a plurality of equidistant faces 13 of inducing at the positive nearly wheel rim place of wheel disc, the top of the first easy engaging tooth 120 in every group of easy engaging tooth cuts out one section, make its tooth depth be lower than other easy engaging tooth, and process a straight hypotenuse 100 in a side of this tooth.Referring to accompanying drawing 2, Fig. 3, when chain 20 cochains, this chain just can successfully be linked in along the straight hypotenuse of the first easy engaging tooth on the tooth root of this tooth, can avoid the mill that bumps of the first easy engaging tooth and chain fully.In addition, also can process scarf 110, reduce the mill that touches that this tooth and chain form at the place, diagonal angle of the tooth top of difficult engaging tooth.Shown in the accompanying drawing 3 is the transmission process of chain with outer chain sheet 21 cochains, and shown in the accompanying drawing 4 then is transmission process with inner chain sheet 22 cochains, no matter is with outer chain sheet or with inner chain sheet, and the utility model all can very successfully reach the effect of cochain.

Claims

1, a kind of sprocket wheel with cochain function, this Chain wheel plate (10) is gone up uniform many group difficult engaging tooths (11) and many group easy engaging tooths (12), difficult engaging tooth and easy engaging tooth are equidistantly arranged successively, there are a plurality of equidistant faces (13) of inducing at the positive nearly wheel rim place of wheel disc, it is characterized in that the tooth depth of the first easy engaging tooth (120) in every group of easy engaging tooth is lower than other easy engaging tooth.

2, the sprocket wheel with cochain function according to claim 1 is characterized in that, a side of the described first easy engaging tooth is straight hypotenuse (100).

3, the sprocket wheel with cochain function according to claim 1 is characterized in that, the place, diagonal angle of the tooth top of described difficult engaging tooth is scarf (110).