CN203548710U - Silent chain - Google Patents

Silent chain Download PDF

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Publication number
CN203548710U
CN203548710U CN201320717098.3U CN201320717098U CN203548710U CN 203548710 U CN203548710 U CN 203548710U CN 201320717098 U CN201320717098 U CN 201320717098U CN 203548710 U CN203548710 U CN 203548710U
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China
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chain
silent
axle
silent chain
hole
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Expired - Fee Related
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CN201320717098.3U
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Chinese (zh)
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金雁冰
金大汉
杨怡萍
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Abstract

The utility model discloses a silent chain which is composed of inner chain plates, outer chain plates, short hinge pins and long hinge pins. An inner chain plate hole in each inner chain plate is a round hole or an irregularly-shaped hole. A pair of tooth-shaped protrusions are arranged on each inner chain plate hole, wherein the inner chain plate hole is divided into an outside clamping groove and an inside hole groove by the protrusions, the corresponding short hinge pin is located by the tooth-shaped protrusions and the outside clamping groove in the axial direction, and the short hinge pin and the corresponding inner chain plate are fixed together in an interference fit mode. The multiple inner chain plates overlap to form an inner chain link. The long hinge pins penetrate through the inside hole grooves of the inner chain plate holes and are firmly riveted to the two outer chain plates to form an outer chain link. The short hinge pins of the inner chain link and the long hinge pins of the outer chain link are in contact through an arc surface, so that a rotation pair which can rotate within a certain range is formed. According to the silent chain, the structural limit of a traditional silent chain and an Hy-Vo silent chain is broken through, frictional loss and impact vibration between the hinge pins and the chain plates are reduced by means of changing the assembly mode of the hinge pins and the arrangement mode of the inner chain plates, and therefore mechanical large-scale mass production of high-speed silent chains is realized.

Description

A kind of silent chain chain
Technical field
The present invention relates to chain drive component, particularly a kind of for powerdriven silent chain chain.
Background technique
Chain transmission is to utilize the engagement of chain and sprocket tooth to carry out the mechanical transmission of transferring power and motion.Its maximum feature is that average ratios is accurate, transmission efficiency is high; Maximum shortcoming is that easy to wear, easy elongation, noise are large.Compared with band transmission, chain transmission mainly contains 4 advantages:
1. nonelastic slip and skidding, average ratios is accurate, reliable operation, efficiency is high;
2. transmitted power is large, and overload capacity is strong, and the transmission size under identical operating mode is little;
3. required tension force is little, acts on pressure on axle little, can reduce the frictional loss of bearing;
4. can be at high temperature, humidity, many dirt, work in having the rugged environment such as pollution.
And its shortcoming is mainly embodied in 3 aspects:
1. only can be used for the transmission between two-parallel axis;
2. cost is high, easy to wear, easily extends;
3. transmission stability is poor, during running, can produce additional dynamic load, vibration, impact and noise;
4. should not be used in reverse rapidly transmission.
Chain products can be divided into four large classes by its function, Transmitted chains, Conveying chains, drag and draw chain and extraordinary chain.What be generally used for the middle transmission motion of machinery (especially transport facility) and power is Transmitted chains.Transmitted chains mainly contains two kinds of bush roller chain and silent chains.Bush roller chain is comprised of inner plate, outer plate, sleeve, bearing pin, roller.Outer plate is fixed on bearing pin, and inner plate is fixed on sleeve, between roller and sleeve and between sleeve and bearing pin, all can relatively rotate.Silent chain is to utilize the chain sheet of specific profile of tooth and sprocket wheel to be meshed to realize transmission.The working surface of chain sheet is meshed with sprocket wheel.Fall chain when avoiding engaging, interior guide card or outer guide card (outer plate) are housed on chain.During engagement, on guide card and sprocket wheel, corresponding guide groove is chimeric.
Existing motorcycle and bicycle are all to adopt chain and the sprocket wheel of single-row bush roller chain to carry out power transmission conventionally, and main cause has 2 points: 1. manufacture simply, easily realize scale volume production.Bush roller chain is more simple in structure than silent chain, manufacture and installation precision require lower; 2. in open type transmission environment, the especially more road conditions of rainstorm weather or silt, bush roller chain is more wear-resisting than silent chain, and the life-span is longer.But the shortcoming of roller chain is also apparent:
1. noise is large.Noise mainly results from three reasons: the impact of a. chain and sprocket wheel; B. the axial and radial vibration of the running of chain drive bearing and sprocket wheel; C. the collision between chain and guide rail.The noise that the roller vibration that wherein mesh impact causes or sprocket wheel vibration form forms the major component of chain noise.
2. load-carrying is little.When needs increase bearing capacity, roller chain need to increase the pitch of chain or adopt many row chains.But pitch is larger, by speed chain variation and the engaging-in sprocket wheel of chain link, produce and impact caused dynamic load greatly, make on the contrary chain bearing capacity and life-span reduce.
3. not wear-resisting.Between the sleeve of roller chain and bearing pin, with sliding friction, carry out relative movement.In actual use, roller chain bearing pin extremely easily wear and tear, causes chain link elongated, easily causes jumping tooth or de-chain, has a strong impact on chain working life.
4. polygon effect is strong.Sprocket wheel often turns over a tooth, chain speed just from big to small, change once from small to large again, simultaneous chain is up and down to tremble, this chaindriven motion nonuniformity easily causes transverse vibration and the extensional vibration of chain link, make chaindriven instantaneous transmission ratio change and cause additional dynamic load, not only cause noise but also affect working life.
Than bush roller chain, the transmission performance of silent chain obviously takes advantage, and is applicable to more in the environment of high speed, heavy duty, low noise and large centre distance:
1. noise is little.Engaging along roll-sliding movement of sprocket teeth profile of tooth between silent chain carrier bar and sprocket teeth, has reduced the mesh impact between chain and sprocket wheel, and therefore silent chain has the advantages that transmission noise level is declined, and the noise of transmission is far smaller than roller chain.
2. reliability is higher.Because the chain link of silent chain is multidisc structure, when wherein indivedual chain sheets are when work is always destroyed, whole chain do not disconnect immediately, and user can find in time and change.
3. kinematic accuracy is high.The wearing and tearing elongation of the each chain link of roller chain is unequal.Before wearing and tearing, each chain link pitch is identical, the wearing and tearing of sleeve and bearing pin make the inside and outside successively apart from different gradually of roller chain, acromere pitch difference becomes more and more large, and the inconsistent elongation of this each chain internode can cause the vibration in variation and the transmission of speed, causes transmission accuracy to reduce.And the wearing and tearing elongation of the each chain link of silent chain is uniform.After bearing pin weares and teares, the elongation of each chain link equates, wearing and tearing can cause the vibration in variation or the transmission of chain speed hardly, therefore can keep higher kinematic accuracy.
4. transmission efficiency is high, and its average efficiency can be up to 99%.
5. be of compact construction.Compared with the roller chain of same pitch, the structure of silent chain is more compact.When needs increase bearing capacity, silent chain only need increase less size on width direction just can obtain larger bearing capacity.Roller chain needs to increase the pitch of chain or adopts many row chains.But pitch is larger, by speed chain variation and the engaging-in sprocket wheel of chain link, produce and impact caused dynamic load greatly, make on the contrary chain bearing capacity and life-span reduce.
6. there is high capacity transmission capacity.Silent chain can be effectively worked at the rotating speed of 11000r/min, and its bearing capacity is about 3.8 times of roller chain.
Although silent chain has more superior transmission performance than roller chain, the at present fresh outer chain of motorcycle that is used in less, main cause is its easily wearing and tearing in open type environment, working life is not long.Silent chain majority is applied in automobile timing system, has good lubricated environment.In the practical service environment of motorcycle, the wearing and tearing between silent chain bearing pin and carrier bar are accelerated in the erosion of rainwater, silt, cause the roller chain of its working life lower than same pitch.
In recent years, Hy-Vo silent chain by the invention of U.S. Morse company significantly improves working life, the a pair of circular bearing pin that the special-shaped bearing pin rolling is replaced to traditional silent chain for this chain, between hinge pin, take rolling friction as main, frictional loss is less than traditional round pin formula silent chain.But Hy-Vo chain is widely current not yet, main cause has 3 points:
1. production technology content is high, and manufacture difficulty is large.Only have in the world the developed countries such as the U.S., Japan, Germany to produce, the product of the companies such as U.S. Morse, Japanese D.I.D has captured staple market.Wherein, the technical strength of Morse is the strongest.The silent chain designing technique of Japan D.I.D, TSUBAKI is also innovation to some extent on the basis of digesting and assimilating Morse designing technique.Germany IWIS is also carrying out the silent chain series product research and development of new meshing mechanism in recent years.The multinomial patented technology of dissimilar silent chain product is all had respectively by above-mentioned external producer.The silent chain series product of applying on the numerous cars of China recent years are mostly from Morse, D.I.D import.
2. machine scale volume production difficulty.The most outer gearing mechanism that adopts of Hy-Vo chain at present.Multilayer tooth shape chain board is staggered to be stacked, by one is long and the other is short two to hinged the forming of special-shaped bearing pin of rolling.The Hy-Vo chain that different manufacturers is produced rolls pin structure and is also not quite similar, and rolls pin develop into non-circular hole to rolling the form of bearing pin chain link from initial circular port tile type.Take the oval pore that occurs in recent years as example, multilayer profile of tooth inner plate is staggered to be stacked, and long and short bearing pin is through inner plate oval pore, and is staggered respectively curve outside the oval pore of arrangement and locates in the mode of Spielpassung, and the axle of finally having strong market potential is entered outer plate by riveting.Because the inner plate number of plies is more and be staggered, and the gap fiting mode between inner plate and long and short bearing pin, Hy-Vo silent chain majority can only be manufactured by hand, volume production difficulty.
3. manufacture cost is high.Due to above-mentioned two reasons, although Hy-Vo silent chain has overcome, traditional silent chain is not wear-resisting, the shortcoming of easy elongation, because high cost cannot be widely current.
In view of the above, our target is a kind of silent chain chain of invention, have that wear-resistant, low noise, load-carrying are strong concurrently, stable drive, advantage that polygon effect is low, the more important thing is that cost is controlled, it is convenient to produce, can machine scale volume production, be applicable to rainstorm weather, the more open type environment of silt.
Summary of the invention
Object of the present invention is exactly the deficiency for existing traditional silent chain and Hy-Vo silent chain, provides that a kind of wear-resistant, low noise, load-carrying are strong, stable drive, produces silent chain chain convenient, that can realize machine scale volume production simultaneously.
For achieving the above object, the present invention adopts following technological scheme: a kind of silent chain chain, by inner plate, outer plate, short pin shaft and the axle of having strong market potential, formed, inner plate hole on inner plate is circular port or non-circular hole, the sectional shape in the outer plate hole on outer plate is identical with the sectional shape of the axle of having strong market potential, and short pin shaft and the axial section shape of having strong market potential form by some sections of circular arcs and some sections of straight lines.Inner plate hole is provided with a pair of toothed projections, this a pair of toothed projections is divided into outer side bayonet slot and inner side hole slot two-part by inner plate hole, short pin shaft is located by this pair of toothed projections and outer side bayonet slot in the axial direction, and is fixed together in the mode of interference fit with inner plate, forms inner link.Several pieces inner plate overlap assemblies.The axle of having strong market potential passes the inner side hole slot in inner plate hole, and firmly rivets with upper and lower two outer plates, forms outer link.Short pin shaft on inner link contacts by circular arc working surface with the axle of having strong market potential on outer link, and forms the revolute pair that can rotate within the specific limits.The sprocket tooth form coordinating with the silent chain chain in technique scheme is straight line, involute or circular arc.The transversal curve of the transversal curve of the circular arc work surface of contact of short pin shaft and the circular arc work surface of contact of the axle of having strong market potential is single curvature curve; Or the transversal curve of the transversal curve of the circular arc work surface of contact of short pin shaft and the circular arc work surface of contact of the axle of having strong market potential is variable curvature curve.Arc contact surface radius of curvature and the chain pitch ratio of short pin shaft and the axle of having strong market potential are 0.4-0.7.Silent chain chain in technical solution of the present invention is applicable to the outer chain in vehicle.
Adopt the present invention (Fig. 1-3) of technique scheme, contrast existing Hy-Vo silent chain (Fig. 4), the inner plate hole (HV-0) of existing Hy-Vo silent chain is upper without projection, and inner plate (HV-1) is staggered; Long (HV-4), short pin shaft (HV-3) be through inner plate hole (HV-0), and outside, inner plate hole (HV-0) curve that is staggered respectively arrangement locates in the mode of Spielpassung, and the axle of finally having strong market potential (HV-4) is entered outer plate (HV-2) by riveting.Because the inner plate number of plies is more and be staggered, and the gap fiting mode between inner plate (HV-1) and long (HV-4), short pin shaft (HV-3), existing traditional Hy-Vo silent chain majority can only be manufactured by hand, volume production difficulty; And easily increase the wearing and tearing between short pin shaft (HV-3) and the axle of having strong market potential (HV-4); Also easily cause wearing and tearing and gummed between bearing pin and carrier bar.During Transmitted chains work of the present invention, short pin shaft is firmly fixed in carrier bar, and the fixing design of this interference is compared existing Hy-Vo chain and more easily realized automation assembly technology, has effectively improved manufacturing efficiency, reduces production costs.Simultaneously, because the circular arc of the outer side bayonet slot of the back side circular arc of short pin shaft and inner plate closely cooperates, the a pair of toothed projections in the two ends of short pin shaft and inner plate hole is accurate fixing, avoided on the one hand frictional loss and the gummed problem between bearing pin and carrier bar, the silent chain of prior art can effectively reduce the shock and vibration in chain transmission process relatively, thereby significantly improves working life.On the other hand, by increasing the surface of contact of the circular arc of side bayonet slot outside short pin shaft and carrier bar, the corresponding raising of bearing capacity of chain link, the Breaking load of silent chain is improved, and is more suitable for heavily loaded Environmental Conditions.
Adopt the present invention of [0010] section of technological scheme herein, due to several pieces the overlapping arrangements of described inner plate, but not existing silent chain or Hy-Vo silent chain inner plate (HV-1) be staggered, as the interference fit of short pin shaft is fixing as described in [0010] section, design that to make to block chain in actual use convenient herein.
Adopt the present invention of [0010] section technological scheme herein, due to short pin shaft by the toothed projections in inner plate hole and outer side bayonet slot in axially locating, and be fixed together in the mode of interference fit with inner plate, formation inner link.The axle of having strong market potential passes the inner side hole slot in inner plate hole, and is firmly riveted together with two outer plates, forms outer link.The axle of having strong market potential of the short pin shaft of inner link and outer link contacts by circular arc working surface, the revolute pair that formation can be rotated within the specific limits.When this silent chain is on sprocket wheel, be wound around while enclosing the state of chain, its pitch regulates by the hinge of described a pair of long and short bearing pin composition.Before engagement, two bearing pins are in some contact lower than below chain pitch line, and when turning over after several angle, chain is centered around on sprocket wheel, and the axle of having strong market potential rolls along corresponding short pin shaft, make to move on the point of contact of two bearing pins, and chain pitch extends, and realizes " pitches " characteristic.This characteristic can reduce the impact between polygon effect and the carrier bar being caused by polygon effect and the sprocket tooth in chain transmission, can also reduce sprocket wheel peak load, the working stress that silent chain compared to existing technology can bear this chain is larger, can the larger power of transmission.Simultaneously, between silent chain hinge compared to existing technology, bearing pin and chain board space exist sliding friction, between the long and short bearing pin of this chain take rolling friction as main, its frictional loss is less than sliding friction, therefore be applicable to working environment more at a high speed, and be difficult for gummed or excessive wear occur, significantly improve the working life of chain.In addition, the abnormity of this chain axle of having strong market potential contacts by arc surface with short pin shaft, and its working surface has larger pressure loaded area, the corresponding raising of bearing capacity of chain link, thus improved the Breaking load of chain.
Preferably, when needs increase bearing capacity, chain only need to increase the superimposed sheets number of inner plate, or the less size of increase just can obtain larger bearing capacity on carrier bar width direction.Compare existing roller chain by increasing the pitch of chain or adopting many row chains to improve bearing capacity, this chain has compact structure and mobile type more, has fully demonstrated " personalization " that be suitable for different operating modes.
Preferably, arc contact surface radius of curvature and the chain pitch ratio of short pin shaft and the axle of having strong market potential are 0.4-0.7.The curvature of the transversal curve of the arc contact surface curvature of axle of having strong market potential and the arc contact surface of short pin shaft can be got identical numerical value, also can get different numerical value.The transversal curve of arc contact surface can also be variable curvature, and, when chain is wrapped on sprocket wheel, along with a certain chain link enters tooth, locates, moves back tooth, the long and short bearing pin on this chain link rolls on the surface of contact of different curvature.The optimization of long and short bearing pin surface of contact curvature is selected, most important for the chain of manufacturing high speed and precision.
Through experimental verification, compared with the bush roller chain of silent chain of the present invention and conventional construction, load capacity (take 4 inner plates as example) improves two to three times; Under identical load, improve nearly three times working life; When CF center frequency is in 3200Hz left and right, noise reaches the about 75db of peak value; And under normal open type Environmental Conditions, occur that the time of noise in people's ear tolerance interval postpones more than 3.5 times than common roller chain.Compared with the silent chain chain of silent chain of the present invention and conventional construction same size, load capacity remains basically stable; Under identical load, improve two to three times working life; And under normal open type Environmental Conditions, occur that the time of noise in people's ear tolerance interval postpones more than one times than common silent chain.Compared with the common Hy-Vo silent chain chain of silent chain of the present invention and same size, load capacity remains basically stable; Under identical load, remain basically stable working life; And under normal open type Environmental Conditions, occur that the time of noise in people's ear tolerance interval remains basically stable; Cost of production reduces 50%-70%, realizes machine automation assembling, and manufacturing efficiency significantly improves.
The invention has the beneficial effects as follows, broken through the structural limitations of traditional silent chain, reduced the frictional loss between bearing pin and carrier bar, significantly reduced the polygon effect in transmission, reduced shock and vibration, thereby reduce noise, alleviate wearing and tearing; By increasing the area of contact of special-shaped bearing pin, effectively improve the Breaking load of silent chain simultaneously.On the other hand, the present invention has broken through the structural limitations of Hy-Vo silent chain, by changing the arrangement mode of bearing pin assembling mode and inner plate, overcome the difficulty of high speed silent chain production technology too high levels, realize mechanization scale volume production, effectively reduce cost of production, improved manufacturing efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation axonometric drawing of silent chain chain of the present invention.
Fig. 2 is the plan view of silent chain chain of the present invention.
Fig. 3 is the plan view of silent chain chain of the present invention.
Fig. 4 is Hy-Vo silent chain structural representation.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but therefore do not limit the present invention among described scope of embodiments.
Embodiment 1, and referring to Fig. 1-3, a kind of silent chain chain for the outer chain of motorcycle, is comprised of 4 inner plates (1), outer plate (2), short pin shaft (3) and the axle of having strong market potential (4).Described inner plate hole (5) is circular hole, and inner plate hole (5) are provided with a pair of toothed projections (1a), and toothed projections (1a) is divided into outer side bayonet slot (1b) and inner side hole slot (1c) two-part by inner plate hole (5).Outer plate hole (6) sectional shape is identical with the axle of having strong market potential (4) sectional shape.Short pin shaft (3) and the axle of having strong market potential (4) sectional shape form by some sections of circular arcs and some sections of straight lines.Short pin shaft (3), and is fixed together in the mode of interference fit with inner plate (1) in axially locating by toothed projections (1a) and outer side bayonet slot (1b), and several pieces inner plates (1) overlap assembly, forms inner link.The axle (4) of having strong market potential passes the inner side hole slot (1c) in inner plate hole (5), and is firmly riveted together with two outer plates (2), forms outer link.The short pin shaft (3) of inner link and the axle of having strong market potential (4) of outer link contact by circular arc working surface, the revolute pair that formation can be rotated within the specific limits.
More than show and described basic principle of the present invention and major character, and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-mentioned enforcement and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (9)

1. a silent chain chain, by inner plate (1), outer plate (2), short pin shaft (3) and the axle of having strong market potential (4) composition, inner plate hole (5) on described inner plate (1) is circular port or non-circular hole, the sectional shape in the outer plate hole (6) on described outer plate (2) with described in the have strong market potential sectional shape of axle (4) identical, described short pin shaft (3) and described in axle (4) sectional shape of having strong market potential by some sections of circular arcs and some sections of straight lines, form, it is characterized in that, described inner plate hole (5) is provided with a pair of toothed projections (1a), described a pair of toothed projections (1a) is divided into outer side bayonet slot (1b) and inner side hole slot (1c) two-part by described inner plate hole (5), described short pin shaft (3) is in the axial direction by described a pair of toothed projections (1a) and described outer side bayonet slot (1b) location, and be fixed together in the mode of interference fit with described inner plate (1), form inner link.
2. silent chain chain according to claim 1, several pieces overlap assemblies of described inner plate (1).
3. silent chain chain according to claim 2, described in have strong market potential axle (4) through the described inner side hole slot (1c) in described inner plate hole (5), and firmly rivet formation outer link with upper and lower two described outer plates (2).
4. silent chain chain according to claim 3, the described short pin shaft (3) on inner link with on outer link described in the axle (4) of having strong market potential by circular arc working surface, contact, and form the revolute pair that can rotate within the specific limits.
5. silent chain chain according to claim 4, the sprocket tooth form coordinating with described silent chain chain is straight line, involute or circular arc.
6. silent chain chain according to claim 5, the transversal curve (3a) of the circular arc work surface of contact of described short pin shaft (3) and described in the have strong market potential transversal curve (4a) of circular arc work surface of contact of axle (4) be single curvature curve.
7. silent chain chain according to claim 5, the transversal curve (3a) of the circular arc work surface of contact of described short pin shaft (3) and described in the have strong market potential transversal curve (4a) of circular arc work surface of contact of axle (4) be variable curvature curve.
8. according to the silent chain chain described in claim 6 or 7, arc contact surface radius of curvature and the chain pitch ratio of described short pin shaft (3) and the axle of having strong market potential (4) are 0.4-0.7.
9. silent chain chain according to claim 8, is applicable to the outer chain in vehicle.
CN201320717098.3U 2013-11-13 2013-11-13 Silent chain Expired - Fee Related CN203548710U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557270A (en) * 2013-11-13 2014-02-05 金雁冰 Tooth-shaped chain
CN104150167A (en) * 2014-08-14 2014-11-19 天地科技股份有限公司 Bearing structure of quantitative plate conveyer
CN105951595A (en) * 2016-04-29 2016-09-21 潘富荣 Chain type steel and assembling method thereof
CN110630688A (en) * 2019-09-27 2019-12-31 昆山泓源链条有限公司 Tooth chain for large vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557270A (en) * 2013-11-13 2014-02-05 金雁冰 Tooth-shaped chain
CN104150167A (en) * 2014-08-14 2014-11-19 天地科技股份有限公司 Bearing structure of quantitative plate conveyer
CN105951595A (en) * 2016-04-29 2016-09-21 潘富荣 Chain type steel and assembling method thereof
CN105951595B (en) * 2016-04-29 2018-03-13 潘富荣 A kind of chain shaped steel and its assembling method
CN110630688A (en) * 2019-09-27 2019-12-31 昆山泓源链条有限公司 Tooth chain for large vehicle

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Granted publication date: 20140416

Termination date: 20161113