CN2366349Y - Chain wheel of bicycle - Google Patents

Abstract

The utility model relates to a tooth disk of a bicycle. A circle of clamping teeth is arranged on the periphery of the tooth disk in an equidistance mode, so a chain can be sheathed with the clamping teeth. The utility model is characterized in that each clamping tooth has the shape that the right side of the end part of each clamping tooth is higher than the right side of the end part of each clamping tooth if a user views from the obverse surface of the tooth disk, and each clamping tooth is an easy-conjunction tooth shape. When the utility model is used, each clamping tooth has the chain-linking function, and the chain-linking drop height can not be formed; thus, the good chain-linking order can be improved, and comfort of a pedal can be increased. The utility model has the advantages of an inducement surface does not needed to be punched, the structure is simplified, the manufacture and the processing are easy, and the cost can be lowered; thus, the utility model can be widely used for various bicycles.

Description

Bicycle crank

The utility model relates to a kind of bicycle crank.

The fluted disc structure (as shown in Figure 5) that the bicycle of commonly using has the tooth portion at the N-PITCH fluted disc to improve, equidistant several latches 21 that is provided with of its fluted disc 20 side faces, and on 20 of fluted discs, the corresponding face 22 of inducing is set, induce face 22 top margins to contain and cover several latches 21, and induce face 22 1 ends tiltedly extend with one be called and easily agree with tooth 23 and join.Yet, this design has following shortcoming: 1, easily agree with tooth owing to the latch every appropriate intervals just is provided with one, when therefore chain is desired cochain, need rotary fluted disc to easily agreeing with tooth, just can do cochain action, if the proper mal-alignment of chain easily agrees with tooth, just need wait until when last could cochain, thereby can produce the drop of cochain, the cyclist can produce pause, trample having some setbacks and sense of discomfort of falling through slightly.2, for chain guide is extremely easily agreed with tooth, the corresponding section needs establish the face of inducing in the fluted disc upper punch, and adds the face of inducing, and can increase the difficulty of manufacturing, and not only processing is difficult for, and increases die cost.

At the problems referred to above, the purpose of this utility model provides a kind of cochain function that all has on each latch, can not fall through, trample smooth and easy, and easy to manufacture, the bicycle crank of cost-cutting.

For achieving the above object, the utility model is taked following design: a kind of bicycle crank, the equidistant circle latch that is provided with on its fluted disc periphery, nested for chain, it is characterized in that: described latch shape, from the fluted disc front, each described latch end is the right side than the left side height, that is each latch is and easily agrees with the profile of tooth attitude.

The utility model is owing to take above design, it has the following advantages: 1, the utility model is owing to all make the structural form that easily agrees with tooth with each latch, so each latch all has the cochain function, can not form the cochain drop, improve the smoothness of cochain, promoted the comfort of trampling.2, the utility model easily agrees with the profile of tooth attitude owing to each latch is, and therefore need not punching out induces face, designs simplification, and processing and manufacturing is easy, but cost-cutting.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural representation

Fig. 2 is that the utility model amplifies schematic top plan view

Fig. 3 is the utility model cochain scheme drawing

Fig. 4 is the flywheel structure scheme drawing that the utility model is formed

Fig. 5 commonly uses structural representation

As shown in Figure 1 and Figure 2, the utility model is at fluted disc 10 peripheries, the equidistant circle latch 11 that is provided with, and latch 11 can supply the chain fit.It is characterized in that: if from the front of fluted disc 10, each latch 11 end is right side 110 than left side 111 height, that is each latch 11 all is made into the form of easily agreeing with tooth, makes each latch 11 all have the cochain function, prevent the cochain drop with this, trample purpose smoothly and reach to improve.

As shown in Figure 3, Figure 4, the utility model is incorporated into the flywheel form with the fluted disc 10 that several pieces have the different numbers of teeth.When the cyclist rides, can be as commonly using bicycle be arranged on variable speed control bar on the handlebar with manual manipulation, control change-speed box and stir chain 12 through brake cable, just chain 12 parts can be partial to mobile.And, the latch 11 of the utility model fluted disc 10 easily agrees with the profile of tooth attitude because of all being, therefore the chain sidesway relies on fluted disc 10, just can be against latch 11 right side concave arcs with the outer chain sheet end, do the action of outer chain sheet cochain immediately, perhaps can be against latch 11 right side concave arcs, do the action of inner chain sheet cochain immediately with the inner chain sheet end, and no matter be inner chain sheet or outer chain sheet cochain, its action all is to finish moment, can not form drop, can promote the smoothness of trampling.

Claims (1)

1, a kind of bicycle crank, the equidistant circle latch that is provided with is nested for chain on its fluted disc periphery, it is characterized in that: described latch shape, from the fluted disc front, each described latch end is the right side than the left side height, that is each latch is and easily agrees with the profile of tooth attitude.