CN203698578U - Bicycle gear disc - Google Patents
Bicycle gear disc Download PDFInfo
- Publication number
- CN203698578U CN203698578U CN201320891949.6U CN201320891949U CN203698578U CN 203698578 U CN203698578 U CN 203698578U CN 201320891949 U CN201320891949 U CN 201320891949U CN 203698578 U CN203698578 U CN 203698578U
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- China
- Prior art keywords
- chain
- double wedge
- bicycle crank
- double
- convex
- Prior art date
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- Expired - Fee Related
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 15
- 239000012535 impurity Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Gears, Cams (AREA)
Abstract
The utility model relates to a fluted disc of a bicycle, which comprises a disc body and a plurality of convex teeth, wherein the outer peripheral surface of the disc body is provided with a plurality of convex tooth forming parts corresponding to chain holes of a chain, at least one side of the plate surface of the plate body is provided with a convex part with smaller outer diameter, the periphery of the convex part is formed into a wave shape which can be correspondingly embedded with the lower side edges of the inner chain sheet and the outer chain sheet of the chain, the plurality of convex teeth are arranged on the convex tooth forming parts and consist of a plurality of first convex teeth, a plurality of second convex teeth and at least one odd-numbered third convex tooth, the plurality of first convex teeth are even numbers, the tooth surface of the chain is provided with a convex block, so that the plurality of first convex teeth can be embedded into the wide chain holes of the chain, the plurality of second convex teeth and the plurality of third convex teeth are staggered with the plurality of first convex teeth, the plurality of second convex teeth are odd numbers and can be embedded into the narrow chain holes of the chain, and the third convex teeth are shorter in length and can be correspondingly embedded into the narrow chain holes of the chain. The structure can make the transmission smoother and better, and can greatly reduce the occurrence of chain falling.
Description
Technical field
The utility model relates to a kind of attachments of a bicycle, particularly relates to one and can make transmission more smooth and easy, good, and can significantly reduce the bicycle crank of the situation generation of the chain that falls.
Background technology
General existing known bicycle crank structure, as shown in the bulletin M243426 patent of contriver's earlier application, it is mainly to form evagination shape at least one side panel face of fluted disc, and the corresponding at least root place of sprocket of the surrounding of this evagination shape is the support sector that forms external convex arc shape, and this support sector can be concavo-convex relative with the interior radian of chain inner chain sheet.So, just can support inner chain sheet downside to be recessed radian position by this support sector, make the inner arc place of this fluted disc and chain increase actv. area of contact, to reduce abrasion speed, strengthen rigidity and rigidity and intensity while supporting chain gear, more difficult de-chain while allowing chain interlock, to guarantee good failure-free transmission usefulness.
But, operate through contriver's test and actual use for a long time, find that it still exists following problems:
1, the support sector of this existing known bicycle crank is only for the downside that is supported in inner chain sheet, it also cannot support the downside of outer chain sheet, therefore the downside of this outer chain sheet is be unsettled state outside fluted disc and be not subject to any support, thereby can make whole chain easily produce the stress of torsion, distortion at outer chain sheet place, and then increase the damage mill of itself and sprocket, and be easy to the situation of chain that therefore falls, and then can affect its transmission usefulness.
2, this existing known bicycle crank is mainly to produce the object of transmission at its one side of something with the mutual interlock of sprockets multiple with it for chain winding, but each joint of each sprocket of fluted disc and chain in the time making all more or less exist some tolerances, and this chain is in the time of transmission, it starts and the outward extending part of fluted disc interlock place nonideal linearly tight state, but be subject to gravitating and be sagging bowed state, therefore it starts interlock place with the sprocket of the fluted disc rotating, the situation that just often can interfere, although and so interfere small but feel to have some setbacks when Chang Huirang user's pushes pedals in the middle of transmission process.
3, the thickness of multiple sprockets of this existing known bicycle crank is all equally, and its thickness is the narrow chain hole can embed this chain and can not have large gap and be as the criterion.Therefore, in the time that this sprocket embeds in the wide chain hole of this chain, between the outer chain sheet of this sprocket and these both sides, wide chain hole, just can form very large gap, so when this fluted disc just can significantly weaken its transmission tension force in the time driving this chain, and the chain at this wide chain hole place also can be because of easily horizontal sliding on this sprocket of excessive clearance, to be easy to the situation of chain.Especially, bicycle is advanced in mountain region or when other rough landform, it causes falling the situation of chain serious especially.
4, the wide chain hole of general chain is to have larger space, so easily card is established earth ... Deng impurity.Especially, this existing known bicycle crank is owing to can producing larger gap between the wide chain hole of its sprocket and this chain, so earth that wherein card is established ... Deng impurity if not at once get rid of, it not only can cause the wearing and tearing of chain or sprocket, and can have influence on especially the transmission effect of fluted disc and chain.
Because the defect that above-mentioned existing bicycle crank exists, practical experience and the expertise of the inventor based on being engaged in this type of product design manufacture and enriching for many years, and the utilization of cooperation scientific principle, actively research and innovation in addition, to founding a kind of bicycle crank of new structure, can improve general existing bicycle crank, make it have more practicality.Through constantly research, design, and after repeatedly studying sample and improving, finally create the utility model having practical value.
Summary of the invention
Main purpose of the present utility model is, overcome that the transmission that existing known bicycle crank exists is better, transmission has some setbacks, easily block the problems such as impurity of establishing in the situation of the chain that easily falls and chain, and provide a kind of bicycle crank of new structure, technical matters to be solved is to make it improve general existing bicycle crank, is very suitable for practicality.
The purpose of this utility model and solve its technical matters and realize by the following technical solutions.According to the bicycle crank the utility model proposes, comprise disk body and multiple double wedge.Wherein, the chain hole place of the corresponding chain of the outer peripheral face of this disk body is formed with respectively multiple double wedge forming portions.In the card of its at least one side, have the protuberance of less external diameter, the surrounding of this protuberance forms can be for corresponding with the lower side of the inside and outside chain sheet of this chain chimeric wavy.Multiple double wedges are located in the plurality of double wedge forming portion, and the plurality of double wedge is made up of multiple the first double wedges, multiple the second double wedge and at least more than one odd number the 3rd double wedge.The quantity of the plurality of the first double wedge is even number, on its flank of tooth, has projection, and the upper edge of this projection extends to increment face, the plurality of the first double wedge can be embedded in the wide chain hole of this chain and also do not have large gap between the two.The plurality of the second double wedge and the 3rd double wedge are to form and be crisscross arranged with the plurality of the first double wedge, and the quantity of the plurality of the second double wedge is odd number, and it can embed in the narrow chain hole of this chain and does not have large gap between the two.The 3rd double wedge has shorter length, and in can the corresponding narrow chain hole that embeds chain and can chain not produced and be interfered.
The purpose of this utility model and solve its technical matters and can also be further achieved by the following technical measures.
Aforesaid bicycle crank, forms blowdown ditch between the lower edge of the first wherein said double wedge projection and the surrounding of protuberance.
Aforesaid bicycle crank, the junction of wherein said protuberance and each double wedge forming section is respectively equipped with the mudhole running through.
Aforesaid bicycle crank, has respectively projection on the forward and backward lateral tooth flank of wherein said multiple the first double wedges.
Aforesaid bicycle crank, the width of two wherein said projections is the width that are less than between two tooth limits of the first double wedge.
Aforesaid bicycle crank, the length of the 3rd wherein said double wedge is the degree of depth that only can be inserted into below this narrow chain hole half.
Aforesaid bicycle crank, all has protuberance in the card of the forward and backward side of wherein said disk body.
Aforesaid bicycle crank, the quantity of wherein said multiple the first double wedges is even number.
By technique scheme, the utility model bicycle crank at least has following advantages and beneficial effect:
1, bicycle crank provided by the utility model is to form the corresponding chimeric wavy structure design of lower side that can supply with the inside and outside chain sheet of this chain by the surrounding of this protuberance, while making this fluted disc drive this chain, the surrounding of this protuberance can provide at the outer chain sheet of this chain and inner chain sheet downside that actv. is larger to be contacted and support, therefore can avoid this chain to produce and reverse or distortion, so can make its transmission more good.And this protuberance also can increase the structural strength of this fluted disc, therefore can improve whereby especially its transmission rigidity and efficiency.
2, by the space that wherein shorter the 3rd double wedge of odd number amount is abdicated, be the making tolerance that can sponge each double wedge of fluted disc and each joint of chain, to reduce the interference frequencies of double wedge of chain and fluted disc, and then can make its transmission more smooth and easy.
3, by the projection on the flank of tooth of the plurality of the first double wedge, after making it in the wide chain hole that embeds this chain, can not there is too large gap between the two, therefore the transmission tension force can effectively increase this fluted disc and drive this chain time, and can reduce the horizontal activity of this chain on this fluted disc, therefore can effectively reduce the chance of its chain that falls.
4, utilize under this two projection along and the surrounding of this disk body protuberance between the blowdown ditch that forms, can the earth of establishing will be blocked easily in wide chain hole on this chain especially ... discharge Deng impurity, to keep the clean of chain, and then can further reduce the wearing and tearing of chain or double wedge, and can further reduce the situation of the chain that falls.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of specification sheets, and for above and other object of the present utility model, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the utility model the first embodiment.
Fig. 2 is the leading flank schematic diagram of the utility model the first embodiment.
Fig. 3 is the A-A section enlarged diagram of Fig. 2.
Fig. 4 is the B-B section enlarged diagram of Fig. 2.
Fig. 5 is the fluted disc of the utility model the first embodiment and the exploded perspective schematic diagram of chain.
Fig. 6 is the fluted disc of the utility model the first embodiment and the unitized construction schematic perspective view of chain.
Fig. 7 is the generalized section that the first double wedge of the utility model the first embodiment coordinates with wide chain hole.
Fig. 8 is the generalized section that the second double wedge of the utility model the first embodiment coordinates with narrow chain hole.
Fig. 9 is the second embodiment of the present utility model.
Figure 10 is the 3rd embodiment of the present utility model.
Figure 11 is the 4th embodiment of the present utility model.
Figure 12 is the 5th embodiment of the present utility model.
Figure 13 is the 6th embodiment of the present utility model.
Figure 14 is the 7th embodiment of the present utility model.
[main element nomenclature]
10: fluted disc 11: disk body
12: double wedge forming portion 13: protuberance
21: the first double wedges of 20: the three double wedges
22: the second double wedges 23: projection
24: blowdown ditch 25: mudhole
30: chain 31: inner chain sheet
32: outer chain sheet 33: narrow chain hole
34: wide chain hole
Detailed description of the invention
Technological means and effect of taking for reaching predetermined goal of the invention for further setting forth the utility model, below in conjunction with accompanying drawing and preferred embodiment, to its detailed description of the invention of bicycle crank, structure, feature and effect thereof according to the utility model proposes, be described in detail as follows.
Referring to shown in Fig. 1～Fig. 8, is the first embodiment for bicycle crank described in the utility model, wherein shows that this bicycle crank 10 includes disk body 11 and multiple double wedge.Wherein:
This disk body 11 is to be formed with respectively multiple double wedge forming portions 12 at the chain hole place of the corresponding chain 30 of outer peripheral face, in the card of these disk body 11 forward and backward sides, have respectively the protuberance 13 of less external diameter, the surrounding of this protuberance 13 is that form can be for corresponding with the inner chain sheet 31 of this chain 30 and the lower side of outer chain sheet 32 chimeric wavy.
The plurality of double wedge is to be located at respectively in the plurality of double wedge forming portion 12, and it comprises the 3rd double wedge 20, multiple the first double wedge 21 and multiple the second double wedge 22.The 3rd double wedge 20 is provided in a side of wherein in a double wedge forming portion 12 corresponding to 33 places, narrow chain hole of this chain 30, and the 3rd double wedge 20 only can be inserted into the degree of depth below these narrow chain hole 33 half, make it have booster action, nor can this chain 30 be formed and be interfered.The quantity of the plurality of the first double wedge 21 is even numbers, and has respectively two projections 23 on its forward and backward lateral tooth flank.The upper edge of this projection 23 extends to increment face, and forms blowdown ditch 24 between the surrounding of the protuberance 13 of lower edge and this corresponding side.The width of this two projection 23 is less than the width between two tooth limits of this first double wedge 21, and it is up-small and down-big trapezoidal that shape is generally, the transversal surface that makes the plurality of the first double wedge 21 is criss-cross and can embeds in the wide chain hole 34 of this chain 30 and make also not have large gap between the two.The quantity of the plurality of the second double wedge 22 is odd number, and it is crisscross arranged respectively between the plurality of the first double wedge 21.The transversal surface of the plurality of the second double wedge 22 is in-line, can embed in the narrow chain hole 33 of this chain 30 and make not have large gap between the two.
Referring to shown in Fig. 9, is to be the second embodiment of the present utility model, and its structure and the first embodiment are roughly the same, and difference is that the second embodiment is only provided with protuberance 13 in the card of the front side of this disk body 11.Certainly, the utility model also can only be established protuberance 13 on the trailing flank of this disk body 11, and this is no longer separately repeated.
Refer to shown in Figure 10, Figure 11, to be third and fourth embodiment of the present utility model, its structure and the first embodiment are roughly the same, difference is in this third and fourth embodiment, be the plurality of double wedge forming portion 12 be wherein respectively equipped with the 3rd double wedge 20 corresponding in three of 33 places, narrow chain hole of this chain 30 and five double wedge forming portions 12, and between the plurality of the 3rd double wedge 20 at least between across first double wedge 21.In the utility model, the quantity of the 3rd double wedge 20, except can be above-mentioned 1,3,5, also can be 7,9 ... Deng odd number, this is no longer separately repeated.
Referring to shown in Figure 12, is to be the 5th embodiment of the present utility model, and its structure and above-described embodiment are roughly the same, and difference is, in the above-mentioned double wedge forming portion 12 that should be provided with shorter the 3rd double wedge 20, the 3rd double wedge 20 is not set.
Referring to shown in Figure 13, is to be the 6th embodiment of the present utility model, and its structure and above-described embodiment are roughly the same, and difference is that 23 times edges of projection of all the first double wedges 21 of the 6th embodiment are to extend to be connected to this protuberance 13 around.
Refer to shown in Figure 14, to be the 7th embodiment of the present utility model, its structure and the 6th embodiment are roughly the same, and difference is that the protuberance 13 of the 7th embodiment and the junction of each double wedge forming portion 12 are respectively arranged with the mudhole 25 running through for being used for getting rid of earth ... Deng impurity.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, but not in order to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solutions of the utility model, any simple modification of above embodiment being done according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. a bicycle crank, is characterized in that it comprises:
Disk body, is formed with respectively multiple double wedge forming portions at the chain hole place of the corresponding chain of outer peripheral face, has the protuberance of less external diameter in the card of at least one side, and the surrounding of this protuberance forms can be for corresponding with the lower side of the inside and outside chain sheet of this chain chimeric wavy; And
Multiple double wedges, be provided in a side of in the plurality of double wedge forming portion, the plurality of double wedge is by multiple the first double wedges, multiple the second double wedges and at least more than one odd number the 3rd double wedge form, on the flank of tooth of the plurality of the first double wedge, there is projection, the upper edge of this projection extends to increment face, the plurality of the first double wedge can be embedded in the wide chain hole of this chain and also do not have large gap between the two, the plurality of the second double wedge and the 3rd double wedge are to form and be crisscross arranged with the plurality of the first double wedge, the quantity of the plurality of the second double wedge is odd number, and it can embed in the narrow chain hole of this chain and not have large gap between the two, the 3rd double wedge has shorter length, and in can the corresponding narrow chain hole that embeds chain and can chain not produced and be interfered.
2. bicycle crank according to claim 1, is characterized in that forming blowdown ditch between the lower edge of the first wherein said double wedge projection and the surrounding of protuberance.
3. bicycle crank according to claim 1, is characterized in that the junction of wherein said protuberance and each double wedge forming section is respectively equipped with the mudhole running through.
4. according to the bicycle crank described in claim 1 or 2 or 3, it is characterized in that thering is respectively projection on the forward and backward lateral tooth flank of wherein said multiple the first double wedges.
5. according to the bicycle crank described in claim 1 or 2 or 3, the width that it is characterized in that two wherein said projections is the width being less than between two tooth limits of the first double wedge.
6. according to the bicycle crank described in claim 1 or 2 or 3, the length that it is characterized in that the 3rd wherein said double wedge is the degree of depth that only can be inserted into below this narrow chain hole half.
7. according to the bicycle crank described in claim 1 or 2 or 3, it is characterized in that all thering is protuberance in the card of forward and backward side of wherein said disk body.
8. according to the bicycle crank described in claim 1 or 2 or 3, the quantity that it is characterized in that wherein said multiple the first double wedges is even number.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102147817A TW201525329A (en) | 2013-12-23 | 2013-12-23 | Bicycle fluted disc |
| TW102147817 | 2013-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203698578U true CN203698578U (en) | 2014-07-09 |
Family
ID=51049055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320891949.6U Expired - Fee Related CN203698578U (en) | 2013-12-23 | 2013-12-31 | Bicycle gear disc |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203698578U (en) |
| TW (1) | TW201525329A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3112246A1 (en) * | 2015-07-03 | 2017-01-04 | SRAM Deutschland GmbH | Single chain wheel for a bicycle front crank assembly |
| CN108202841A (en) * | 2016-12-16 | 2018-06-26 | 株式会社岛野 | Bicycle chainwheel and bicycle chain wheel assembly |
| CN110371235A (en) * | 2015-10-09 | 2019-10-25 | 株式会社岛野 | Bicycle sprocket and bicycle sprocket assembly |
| US11884363B2 (en) | 2015-07-03 | 2024-01-30 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11338887B2 (en) * | 2019-02-21 | 2022-05-24 | Shimano Inc. | Bicycle rear sprocket |
-
2013
- 2013-12-23 TW TW102147817A patent/TW201525329A/en unknown
- 2013-12-31 CN CN201320891949.6U patent/CN203698578U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3112246A1 (en) * | 2015-07-03 | 2017-01-04 | SRAM Deutschland GmbH | Single chain wheel for a bicycle front crank assembly |
| EP3483052A1 (en) * | 2015-07-03 | 2019-05-15 | SRAM Deutschland GmbH | Single chain wheel for a bicycle front crank assembly |
| CN110979544A (en) * | 2015-07-03 | 2020-04-10 | Sram德国有限公司 | Single-chain wheel for bicycle front crank device and bicycle front crank device |
| TWI691431B (en) * | 2015-07-03 | 2020-04-21 | 德商矢倫德國股份有限公司 | Individual chain wheel for a bicycle front crank arrangement |
| TWI706894B (en) * | 2015-07-03 | 2020-10-11 | 德商矢倫德國股份有限公司 | Individual chain wheel for a bicycle front crank arrangement |
| EP4026764A1 (en) * | 2015-07-03 | 2022-07-13 | SRAM Deutschland GmbH | Single chain wheel for a bicycle front crank assembly |
| US11884363B2 (en) | 2015-07-03 | 2024-01-30 | Sram Deutschland Gmbh | Sprocket wheel for a bicycle drive |
| CN110371235A (en) * | 2015-10-09 | 2019-10-25 | 株式会社岛野 | Bicycle sprocket and bicycle sprocket assembly |
| CN108202841A (en) * | 2016-12-16 | 2018-06-26 | 株式会社岛野 | Bicycle chainwheel and bicycle chain wheel assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201525329A (en) | 2015-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20191231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |