CN100396970C - High speed transmission roller chain wheel - Google Patents
High speed transmission roller chain wheel Download PDFInfo
- Publication number
- CN100396970C CN100396970C CNB2006100439480A CN200610043948A CN100396970C CN 100396970 C CN100396970 C CN 100396970C CN B2006100439480 A CNB2006100439480 A CN B2006100439480A CN 200610043948 A CN200610043948 A CN 200610043948A CN 100396970 C CN100396970 C CN 100396970C
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- tooth
- sprocket wheel
- high speed
- circular arc
- chain
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The present invention discloses a high speed transmission roller chain sprocket wheel. The left and the right tooth-shaped outlines of the high speed transmission roller chain sprocket wheel form a non-symmetrical structure, namely that the left tooth-shaped outline and the right tooth-shaped outline corresponding to a tooth root circular arc center are not symmetrical to a central connecting line of the sprocket wheel. The outline of a single tooth single side working surface of the sprocket wheel is composed of three sections of curves, wherein a tooth root section forms a circular arc, a leading-in section forms a circular arc, a working section forms one of an involute, a circular arc and a secondary curve or forms a composite curve which is composed of a plurality of sections of circular arcs and secondary curves, and the outline of the working surface can also be composed of two sections of curves which are the tooth root section and the working section. The sprocket wheel of the present invention causes a chain roller to be engaged in and out stably, so the present invention has the advantages of small impact vibration, low noise, simple structure and reliable operation; furthermore, the present invention is suitable for high speed movements.
Description
Technical field
The present invention relates to be fit to the chaindriven roller chain wheel of high speed, belong to the sprocket wheel technical field.
Technical background
The performance of automobile depends primarily on motor, and the quality of motor depends on the quality of each critical component, and timing (or claiming distribution) mechanism is one of critical component of engine interior, and petrol engine all needs the high speed timing mechanism.The motor car engine timing mechanism generally adopts toothed belt.Under high-speed overload, speed change variable load, toothed belt has lower transmitted power and life-span.Adopt the automobile of toothed belt whenever to travel about 100,000 kilometers, toothed belt must be changed, or periodic replacement, otherwise in case fracture can badly damaged motor.Chain-driven has remarkable advantages at aspect of performances such as life-span, bearing capacitys than toothed belt.But, its drive sprocket rotating speed can be up to 7 for motor car engine chain (timing chain and oil pump chain), 000r/min, and motorcycle engine timing chain drive sprocket rotating speed can be up to 10,000r/min far exceeds the limit speed that traditional chain transmission power curve is limited.
The standard tooth form of conventional roller chain sprocket wheel is made up of three sections circular arcs, and its engagement process belongs to non-conjugated engagement.Because the chaindriven noise and vibration of conventional roller, the roller chain drives that designs by NBS generally can only be used for below the rotating speed 2500r/min.The reason that produces noise and vibration mainly contains polygon effect and meshing impact.Owing to there is the shock effect of " polygon effect " and engaging-in moment, traditional chain-driven is difficult to be fit to engine timing mechanism high speed, low vibration, low noise requirement.
Polygon effect also is cutting mutually of replacing of pitch lines and the pitch circle of sprocket wheel of roller chain or tangent, and its chain position of center line periodically changes, and produces laterally to move.The linear velocity of Transmitted chains and follower angular velocity is the variation of generating period therefore, and this variation is that main chain-driven produces bigger influence, meeting chaindriven synchronism of grievous injury engines distribution and uniformity during with Conveying chains work for transmitting movement.
Conventional roller chain-driven as shown in Figure 1, when roller chain and sprocket engagement, roller is at first directly contact with the sprocket wheel bottom, this must have the emergentness of contact, the generation impact.Referring to Fig. 2, as: before hinge A is engaging-in, in the M spot speed with last hinge B speed V
bIdentical.In case hinge A contacts with the gear teeth, M spot speed moment becomes V on the sprocket wheel
mBy speed V
bBecome V
mThe time, causing the oblique impact of the hinge and the flank of tooth, striking velocity is V
Cm
U.S. Pat 5921878A discloses a kind of roller chain wheel, the profile of tooth left side flank profil (being tooth of working surface) and the right flank profil (being the non-working surface flank profil) of this sprocket wheel are asymmetric with respect to tooth root center of arc and centre of sprocket line, its purpose and technique effect mainly are in order to reduce the impact in when engagement, but little for the effect that reduces polygon effect, reduces transversal wave movement.
Summary of the invention
The invention reside in the deficiency that overcomes above-mentioned conventional roller chain, a kind of low vibration, low noise are provided, be fit to the high speed transmission roller chain wheel of high speed transmission.
The present invention adopts following technical solution:
The profile of tooth left and right sides flank profil of high speed transmission roller chain wheel is a non-symmetry structure, promptly the profile of tooth tooth of working surface of this sprocket wheel and non-working surface flank profil are asymmetric with respect to tooth root center of arc and centre of sprocket line, the one-sided tooth of working surface of its monodentate is that left flank profil is made up of tooth root section, introduction segment, three sections curves of active section, wherein the tooth root section is a circular arc, introduction segment is a circular arc, and active section is one of involute, circular arc, quadratic curve or the compound curve be made up of several sections circular arcs, quadratic curve.Tooth of working surface also can be made up of two sections curves, i.e. tooth root section and active section.The non-working surface flank profil is that the curve of right flank profil is a circular arc.
Above-mentioned sprocket wheel with asymmetric left and right sides flank profil structure profile of tooth can make the engaging-in gradually sprocket wheel of roller, and similar traditional involute gear engagement can realize the conjugation engagement, realizes zero meshing impact in theory.Its meshing mechanism, do not have " polygon effect ", do not have laterally and move, the chain pilled-in selvedge keeps upper-lower position constant when being transmission, can reduce transverse vibration to greatest extent and because " polygon effect " driven sprocket rotary vibration of causing, reduce the chain position of center line and periodically change, make the chain-driven center line have fixing position, realize the conjugation engagement substantially.The design of the structure design characteristic of its profile of tooth and sprocket wheel tooth of working surface can guarantee that roller chain and sprocket wheel have little or negative intermeshing pressure angle in engagement process, improve stressing conditions, improve bearing capacity, reduce meshing impact, reduce noise and vibration to greatest extent.Therefore, can realize low vibration, low noise, be fit to the high speed transmission.Asymmetric correcting mode of sprocket tooth form and silent chain chain parameter and sprocket wheel relating to parameters.
Main feature of the present invention is a stable drive, and noise is low, and is simple in structure, and reliable operation is specially adapted to the high speed transmission.
Description of drawings
Fig. 1 is the chaindriven schematic representation of conventional roller.
Fig. 2 is a conventional roller chain meshing impact schematic representation.
Fig. 3 is the structural representation of high speed transmission roller chain wheel tooth curve of the present invention.
Fig. 4 is the tooth-shape structure schematic representation of high speed transmission roller chain wheel of the present invention.
The progressive engaging-in schematic representation of chain roller when Fig. 5 is a sprocket driving of the present invention.
The laterally mobile schematic representation of the no center line of roller chain engagement when Fig. 6, Fig. 7 are sprocket driving of the present invention.
Embodiment
Below in conjunction with drawings and Examples structure of the present invention and use are described further.
Fig. 1 is the chaindriven schematic representation of conventional roller, is used for distribution transmission between engine crankshaft and the camshaft.When traditional roller chain and sprocket engagement, roller is at first directly to contact with the sprocket wheel bottom, and this must have the emergentness of contact, produces to impact.As shown in Figure 2, before hinge A is engaging-in, in the M spot speed with last hinge B speed V
bIdentical.In case hinge A contacts with the gear teeth, M spot speed moment becomes V on the sprocket wheel
mBy speed V
bBecome V
mThe time, causing the oblique impact of the hinge and the flank of tooth, striking velocity is V
Cm
Fig. 3 has provided the tooth curve structure of high speed transmission roller chain wheel of the present invention, and its tooth-shape structure as shown in Figure 4.The profile of tooth left and right sides flank profil of high speed transmission roller chain wheel is that working surface and non-working surface are non-symmetry structure, and promptly left flank profil I and right flank profil II are asymmetric with respect to tooth root circular arc III center and centre of sprocket line (or elongation line) nn.The one-sided tooth of working surface of its monodentate such as Fig. 4 are made up of tooth root section CD, introduction segment DE, three sections curves of active section EF, wherein tooth root section CD is a circular arc, introduction segment DE is a circular arc, and active section EF can be involute, circular arc, quadratic curve, perhaps is the compound curve that several sections circular arcs, quadratic curve are formed.Tooth of working surface also can have only tooth root section and active section.Non-working surface is that the curve of right flank profil II is a circular arc.
Above-mentioned high speed transmission roller chain wheel with asymmetric left and right sides flank profil structure profile of tooth can make the engaging-in gradually sprocket wheel of roller, and similar traditional involute gear engagement can realize the conjugation engagement, realizes zero meshing impact in theory.The progressive engaging-in schematic representation of conventional chains roller when Fig. 5 has provided sprocket driving of the present invention, roller 1,2,3 is engaging-in gradually successively, does not have " engaging-in emergentness ", does not have and impacts.The laterally mobile schematic representation of the no center line of roller chain engagement when Fig. 6, Fig. 7 have provided sprocket driving of the present invention.Chain link shown in Fig. 64 beginning is engaging-in, and chain link 5, chain link 6 is engaging-in finishes, and chain link shaft center G is at the highest notch.Chain link shown in Fig. 74 continues engaging-in, and chain link shaft center G remains unchanged at upper-lower position, finishes until engaging-in.Roller chain meshing mechanism of the present invention, do not have " polygon effect ", do not have laterally and move, the chain pilled-in selvedge keeps upper-lower position constant during transmission, can reduce transverse vibration to greatest extent and because " polygon effect " driven sprocket rotary vibration of causing, reduce the chain position of center line and periodically change, make the chain-driven center line have fixing position, realize the conjugation engagement substantially.The design of the structure design characteristic of its profile of tooth and sprocket wheel tooth of working surface can guarantee that roller chain and sprocket wheel have little or negative intermeshing pressure angle in engagement process, improve stressing conditions, improve bearing capacity, reduce meshing impact, reduce noise and vibration to greatest extent.Therefore, can realize low vibration, low noise, be fit to the high speed transmission.
High speed drive balls chain chain that the present invention relates to and sprocket wheel are specially adapted to the distribution chain-driven between motorcycle and automobile crane and the camshaft, and oil pump chain-driven.Be suitable for replacing the transmission of flute profile band,, guarantee less impact shock and noise simultaneously to have long working life.In various high speed dynamic power machines motor car engine industry particularly, has very wide application prospect.
Claims (1)
1. high speed transmission roller chain wheel, the profile of tooth tooth of working surface of this sprocket wheel and profile of tooth non-working surface flank profil are asymmetric with respect to tooth root center of arc and centre of sprocket line, it is characterized in that: the profile of tooth tooth of working surface of sprocket wheel is made up of tooth root section, introduction segment, three sections curves of active section, wherein the tooth root section is a circular arc, introduction segment is a circular arc, and active section is one of involute, circular arc, quadratic curve or the compound curve be made up of circular arc, quadratic curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100439480A CN100396970C (en) | 2006-05-15 | 2006-05-15 | High speed transmission roller chain wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100439480A CN100396970C (en) | 2006-05-15 | 2006-05-15 | High speed transmission roller chain wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1844712A CN1844712A (en) | 2006-10-11 |
| CN100396970C true CN100396970C (en) | 2008-06-25 |
Family
ID=37063661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100439480A Expired - Fee Related CN100396970C (en) | 2006-05-15 | 2006-05-15 | High speed transmission roller chain wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100396970C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861480B (en) * | 2007-11-14 | 2014-07-23 | 舍弗勒技术股份两合公司 | Low-noise chain drive |
| CN107191574A (en) * | 2017-07-31 | 2017-09-22 | 联诺欧机械科技江苏有限公司 | A kind of drive sprocket |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5921878A (en) * | 1996-07-03 | 1999-07-13 | Cloyes Gear And Products, Inc. | Roller chain drive system having improved noise characteristics |
| US6371875B2 (en) * | 1998-08-25 | 2002-04-16 | Cloyes Gear & Products, Inc. | Random engagement roller chain sprocket with cushion rings and root relief for improved noise characteristics |
| CN1598353A (en) * | 2004-09-15 | 2005-03-23 | 山东大学 | Unequal pitch high speed transmission gear chain and chain wheel |
-
2006
- 2006-05-15 CN CNB2006100439480A patent/CN100396970C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5921878A (en) * | 1996-07-03 | 1999-07-13 | Cloyes Gear And Products, Inc. | Roller chain drive system having improved noise characteristics |
| US6371875B2 (en) * | 1998-08-25 | 2002-04-16 | Cloyes Gear & Products, Inc. | Random engagement roller chain sprocket with cushion rings and root relief for improved noise characteristics |
| CN1598353A (en) * | 2004-09-15 | 2005-03-23 | 山东大学 | Unequal pitch high speed transmission gear chain and chain wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1844712A (en) | 2006-10-11 |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20110515 |