CN201313616Y

CN201313616Y - Bicycle chain plate

Info

Publication number: CN201313616Y
Application number: CNU2008202101365U
Authority: CN
Inventors: 温宜玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-13
Filing date: 2008-11-13
Publication date: 2009-09-23
Anticipated expiration: 2018-11-13

Abstract

The utility model discloses a bicycle chain plate which mainly comprises a body and a reinforced part. The body is a round disc formed through integral injection molding; the external range of body is provided with a plurality of chain tooth forming parts distributed annularly with equal interval; the external range of body is provided with a plurality of chain tooth groups distributed with intervals corresponding to the chain tooth parts; besides, at least one surface of body is convexly and annularly provided with a thickened part; the edge of each thickened part is a support part with a plurality of extruding arcs and corresponding to various chain tooth parts; various reinforced parts are arranged in the body for providing rigidity for the body, so as to construct the chain plate into a bicycle chain plate which can be conveniently manufactured, has rigidity, less weight and lower manufacturing cost through integral injection molding method.

Description

The bicycle chain drum

[technical field]

The utility model is about a kind of chain drum, particularly about a kind of bicycle chain drum.

[background technology]

General existing chain drum is to be installed on the bicycle, drive or drive chain that it is subjected to a chain circle to live half of and mutual interlock and can be subjected to chain, in order to make chain drum have enough rigidity to use, existing chain drum mainly is to form required chain drum by the mode of processing for a metallic material;

Yet, by the mode of metal work, though can provide chain drum enough rigidity, but the metallo-processing mode is not only consuming time, manufacturing cost is high and Heavy Weight, therefore can't satisfy under enough hard conditions, reduce the manufacturing cost and the weight of chain drum effectively, in addition improvements are really being arranged.

[utility model content]

Therefore, the utility model is because deficiency in existing chain drum structure and the manufacturing and disappearance provide a kind of can the improvement to have the bicycle chain drum that lacks now.

Main purpose of the present utility model is to provide a kind of bicycle chain drum, it is to make by the mode of one ejection formation, can conveniently make, described bicycle chain drum has higher rigidity, lighter weight, thereby can reach the purpose of saving the chain drum manufacturing cost.

For achieving the above object, the utility model mainly provides a kind of bicycle chain drum, and it includes a body and a stiffener, wherein:

This body is the disk of one ejection formation, outer peripheral edges in body are uniformly-spaced to be equipped with several sprocket formation portions, be formed with several sprocket groups corresponding with sprocket formation portion respectively and the space in the body outer peripheral edges, in addition body is that convex annular is provided with a thickened section at least one side, wherein the periphery of each thickened section be formed with several prominent arcuations and with each corresponding support portion of sprocket formation portion; And

This stiffener is to be located at the inside of body so as to promoting the rigidity of body.

Preferably, this body is respectively to be formed with a thickened section in two sides, and the periphery of each thickened section presents the wavy of an annular in the both sides of sprocket formation portion.

Preferably, this stiffener is to be located in body interior and between two thickened section and be a shape that is consistent with body.

Preferably, this stiffener is to be located in the thickened section of body.

Preferably, this stiffener is made up of the sheetmetal that several are located in body interior.

Preferably, each sprocket group includes a sprocket, and each sprocket be by a relative sprocket portion of formation stretch establish and be formed at relative sprocket form in the portion.

Preferably, each sprocket group include in addition one with sprocket separately and length be short auxiliary tooth than sprocket.

Preferably, each sprocket group is to be provided with two sprockets, and is to be separated with a sprocket formation portion that is not provided with the sprocket group between being between two adjacent sprocket groups.

Preferably, this body is to run through to be provided with several perforation, and body is in wherein being respectively equipped with a rib that combines with body in several perforation, and each stiffener is that to be located at body interior and between two ribs.

By above-mentioned technological means, the utility model can see through the processing mode of one ejection formation, can be easily body and stiffener are combined and obtain required chain drum, therefore not only can effectively shorten and make the required time of chain drum, and can provide under the enough rigidity, significantly reduce the weight of chain drum, and then provide one to save the bicycle chain drum of manufacturing cost.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of the utility model first preferred embodiment and a chain.

Fig. 2 is the stereoscopic figure that the utility model first preferred embodiment combines with a chain.

Fig. 3 is the three-dimensional generalized section that the utility model first preferred embodiment combines with chain.

Fig. 4 is the cross-sectional front view that the utility model first preferred embodiment combines with chain.

Fig. 5 is the three-dimensional exploded view of the utility model second preferred embodiment and a chain.

Fig. 6 is the three-dimensional generalized section of the utility model the 3rd preferred embodiment.

Fig. 7 is the cross-sectional front view of the utility model the 4th preferred embodiment.

Fig. 8 is the cross-sectional front view of the utility model the 5th preferred embodiment.

Fig. 9 is the front-view schematic diagram that the utility model first preferred embodiment combines with a pedal crankshaft.

(10) chain drum

(11,11B) body

(111) sprocket formation portion (112,112A) sprocket group

(113,113B) the auxiliary tooth of sprocket (114)

(115) rib (116) thickened section

(117) support portion (118) perforation

(12) stiffener

(30) chain (31) chain sheet

(40) pedal crankshaft

[specific embodiment]

The utility model mainly provides a kind of bicycle chain drum 10, please cooperate first preferred embodiment referring to Fig. 1 to Fig. 4, by seeing among the figure, chain drum 10 of the present utility model is that collocation one chain 30 uses, it mainly is to be provided with a body 11 and a stiffener 12, wherein:

This body 11 is the disk of one ejection formation, in the outer peripheral edges of body 11 is uniformly-spaced to be equipped with the corresponding sprocket formation of each chain sheet of several and chain 30 31 portion 111, be formed with several sprocket groups 112 corresponding with sprocket formation portion 111 respectively and the space in body 11 outer peripheral edges, wherein each sprocket group 112 include a sprocket 113 and one and sprocket 113 separately and length be short auxiliary tooth 114 than sprocket 113, wherein each sprocket 113 and auxiliary tooth 114 all are to form portion 111 by a relative sprocket to stretch and establish and form, please cooperate again referring to second preferred embodiment of the present utility model as shown in Figure 5, wherein each sprocket group 112A is provided with two sprockets 113, and be to be separated with a sprocket formation portion 111 that is not provided with sprocket group 112A between being between two adjacent sprocket group 112A, this body 11 is to run through to be provided with several perforation 118 again, and body 11 is in wherein being respectively equipped with a rib 115 that combines with body 11 in several perforation 118 in addition;

This body 11 is that each convex annular is provided with a thickened section 116 in two sides in addition, wherein the periphery of two thickened section 116 be formed with several prominent arcuations and with each sprocket formation portion 111 corresponding support portion 117, make the periphery of each thickened section 116 present the wavy of an annular in the both sides of sprocket formation portion 111, be the 3rd preferred embodiment of the present utility model referring to Fig. 6 please in addition, wherein this body 11 only is formed with a thickened section 116 in a side; And

This stiffener 12 is the inside of being located at body 11 so as to providing body 11 required rigidity, wherein this stiffener 12 is that can be located in body 11 as shown in Figure 3 inner and between two thickened section 116 and be a shape that is consistent with body 11, can shown in the 6th figure, this stiffener 12 be to be located in the thickened section 116 also, also this stiffener 12 is to be located in the body 11 and between two ribs 116 as shown in Figure 7, this stiffener 12 is can be located in body 11 in-to-in sheetmetals by several to be formed, also or as shown in Figure 8, each sprocket group 112 of this body 11B is formed by two

sprocket

113B, and 112 of each sprocket groups are continuously shaped and not at interval, the ora terminalis of stiffener 12 is to stretch out body 11B through sprocket 113B in addition.

The utility model is used for bicycle chain drum 10, be to combine with a bicycle pedal bent axle 40 as shown in Figure 9, and then drive chain 30 carries out transmission, and through above-mentioned technological means, the utility model can be put into stiffener 12 mould of an ejection formation earlier, and see through the processing procedure of ejection formation, can easily body 11 be coated on stiffener 12 outsides and obtain required chain drum 10, quite convenient and quick on the processing procedure, can the existing relatively mode that obtains chain drum via metal work, effectively shorten and make the required time of chain drum 10, and can provide under the enough rigidity, significantly reduce the weight of chain drum 10, so provide one save manufacturing cost be used for bicycle chain drum 10.

Claims

1. a bicycle chain drum includes a body and a stiffener, it is characterized in that:

This body is the disk of one ejection formation, outer peripheral edges in body uniformly-spaced are equipped with several sprocket formation portions, be formed with several sprocket groups corresponding with sprocket formation portion respectively and the space in the body outer peripheral edges, body is provided with a thickened section at least one side convex annular, wherein the periphery of each thickened section be formed with several prominent arcuations and with each corresponding support portion of sprocket formation portion; And

This stiffener is in order to promote the inside of being located at body of body rigidity.

2. bicycle chain drum as claimed in claim 1 is characterized in that: this body respectively is formed with a thickened section in two sides, and the periphery of each thickened section presents the wavy of an annular in the both sides of sprocket formation portion.

3. bicycle chain drum as claimed in claim 2 is characterized in that: this stiffener is located in body interior and between two thickened section and be a shape that is consistent with body.

4. bicycle chain drum as claimed in claim 2 is characterized in that: this stiffener is located in the thickened section of body.

5. bicycle chain drum as claimed in claim 2 is characterized in that: this stiffener is made up of the sheetmetal that several are located in body interior.

6. as each described bicycle chain drum in the claim 1 to 5, it is characterized in that: each sprocket group includes a sprocket, and each sprocket be by a relative sprocket portion of formation stretch establish and be formed at relative sprocket form in the portion, and this body runs through and is provided with several perforation, and body is in wherein several are respectively equipped with a rib that combines with body in boring a hole, and each stiffener is located in the body and between two ribs.

7. bicycle chain drum as claimed in claim 6 is characterized in that: each sprocket group include in addition one with sprocket separately and length be short auxiliary tooth than sprocket.

8. as each described bicycle chain drum in the claim 1 to 5, it is characterized in that: each sprocket group is provided with two sprockets, and be separated with a sprocket formation portion that is not provided with the sprocket group between being between two adjacent sprocket groups, and this body runs through and is provided with several perforation, and body is in wherein several are respectively equipped with a rib that combines with body in boring a hole, and each stiffener is located in the body and between two ribs.

9. as each described bicycle chain drum in the claim 1 to 5, it is characterized in that: each sprocket group is provided with two sprockets, and this body runs through and is provided with several perforation, and body is in wherein being respectively equipped with a rib that combines with body in several perforation, and each stiffener is located in the body and between two ribs, and the ora terminalis of each stiffener stretches out body through sprocket.

10. as each described bicycle chain drum in the claim 1 to 5, it is characterized in that: this body runs through and is provided with several perforation, and body is in wherein several are respectively equipped with a rib that combines with body in boring a hole, and each stiffener is located in the body and between two ribs.