CN101319701B - Power transmission chain and power transmission device - Google Patents
Power transmission chain and power transmission device Download PDFInfo
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- CN101319701B CN101319701B CN2008101095906A CN200810109590A CN101319701B CN 101319701 B CN101319701 B CN 101319701B CN 2008101095906 A CN2008101095906 A CN 2008101095906A CN 200810109590 A CN200810109590 A CN 200810109590A CN 101319701 B CN101319701 B CN 101319701B
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Abstract
A power transmission chain (1) has links (11), pins (14), and inter-pieces (15). The links (14) each have a front and a rear insertion section (12, 13) through which pins are inserted. The pins (14) connect links (11) that are arranged side by side in the lateral direction of the chain such that the front insertion section (12) of one of the links (11) and the rear insertion section (13) of the other link (11) correspond to each other, and the connection is made such that that the links (11) are bendable in the longitudinal direction. The track of the point of contact between a pin (14) and an inter-piece (15) is an involute of a circle. Two or more kinds of combinations of pins (14) and inter-pieces (15), having different base circle radii of involutes, are formed, and these combinations of pins (14) and inter-pieces (15) are randomly arranged.
Description
Application of the present invention is that international filing date is that October 29, application number in 2004 are 200480032364.2, denomination of invention is divided an application for the invention application of " power transmission chain and actuating unit ".
Technical field
The present invention relates to power transmission chain, in more detail, relate to power transmission chain that is applicable to auto continuously variable transmission (CVT) and the actuating unit that adopts this chain.
Background technique
Technique known is shown in figure 18, as auto continuously variable transmission, is by the driving friction wheel 2 that is arranged on motor one side, is arranged on that driven friction wheel 3 and the built Endless power transmission chain 1 between the two of driving wheel one side constitutes; Said driving friction wheel 2 has fixed pulley 2a and removable pulley 2b, and said driven friction wheel 3 has fixed pulley 3b and removable pulley 3a; Through hydraulic transmission make removable pulley 2b, 3a relative fixed pulley 2a, 3b near or leave; Utilize hydraulic pressure to clamp chain 1, between friction wheel 2,3 and chain 1, produce contact load, pass through the frictional force transmitting torque of this contacting part again through this clamping force.
As power transmission chain; In patent documentation 1 (spy opens flat 8-312725 communique), proposed following scheme: this chain has a plurality of chain links and a plurality of the 1st chain pin and the 2nd chain pin; Said chain link has can make chain pin insert the slotting logical portion in logical front and back; Said chain pin will can connect on its length direction at chain link arranged side by side on the width direction of chain with the preceding back corresponding mode of logical portion of inserting of inserting logical portion and another chain link of a chain link each other agley; Contact relative to rolling with the 2nd chain pin through the 1st chain pin and to move, make each chain energy-conservation crooked each other in the longitudinal direction; Said the 1st chain pin is fixed on the preceding of a certain chain link and inserts in the back slotting logical portion that also is embedded in another chain link in the logical portion in a movable manner, and said the 2nd chain pin is embedded in the preceding of a certain chain link in a movable manner and inserts back slotting the leading in the portion that is fixed on another chain link in the logical portion simultaneously.
The power transmission chain of being explained in the above-mentioned patent documentation; Try hard to suppress because of chain be the polygonal vibration that discontinuous body produces; To reach the noise that reduces the stepless speed variator that adopts this chain; Quiet property and the travelling comfort of raising automobile, further the reduction noise of the automobile of this chain for example, are housed for improvement.
Summary of the invention
The object of the present invention is to provide a kind of power transmission chain and power transmission chain transmission device, adopt this chain and device, can further suppress the polygonal vibration, thereby eliminate the main cause that produces noise.
Power transmission chain according to the invention comprises: a plurality of chain links and a plurality of the 1st chain pin and the 2nd chain pin, and wherein, said chain link has can make chain pin insert the slotting logical portion in logical front and back wherein; Said chain pin; Insert the portion of leading to corresponding mode connecting link after inserting logical portion and another chain link with a certain chain link preceding; So that can be crooked each other on its length direction at side by side chain link on the chain width direction, the 1st chain pin is fixed on a certain chain link, and preceding inserting be inserted in the back of another chain link simultaneously movably and inserts in the logical portion in the logical portion, and preceding inserting is fixed on the back of another chain link simultaneously and inserts in the logical portion in the logical portion and the 2nd chain pin is inserted in a certain chain link movably; The 1st chain pin contacts relative to rolling with the 2nd chain pin and moves; Therefore, chain link each other can be crooked in the longitudinal direction, and above-mentioned power transmission chain is characterised in that: have 2 kinds of chain pin groups at least; It is inequality that the two the rolling of its 1st chain pin and the 2nd chain pin contacts the track that moves, and these chain pin groups to be random arrangement arrange.
The 1st chain pin and the 2nd chain pin, for example, wherein either party surface of contact is the plane, then the opposing party's surface of contact will form required curved surface so that can move relative to the contact of rolling between the two.In this case, to form 2 kinds of required curve forms (for example: a kind of relatively large for curvature, another kind is that curvature is less relatively) at least, so just can obtain the different chain pin group of contact motion track of rolling.For the 1st chain pin and the 2nd chain pin, it is also passable to make its each surface of contact form required curved surface respectively.In this case, the surface of contact shape of each chain pin will form 2 kinds (a kind of relatively large for curvature, another kind of curvature is less relatively) at least, and the different chain pin group of contact motion track so just can obtain to roll.
The quantity of 2 kinds of chain pin groups can be identical or roughly the same, and the quantity that also can make a kind of chain pin group is 2 times to 5 times of another kind of chain pin group quantity.
For the rolling that obtains the 1st chain pin and the 2nd chain pin contacts at least 2 kinds of different chain pin groups of motion track; For example, can be different the 1st chain pin and the 2nd chain pin groups that form more than 2 kinds of circle involute and the Base radius that makes involute through the track that makes the 1st chain pin and the contact position of the 2nd chain pin.
In above-mentioned power transmission chain, can form the different chain link more than 2 kinds of pitch, and these chain links are disposed arrangement randomly.
Insert the interval between the logical portion before and after pitch is meant, under the identical situation of the shape of inserting logical portion,, can obtain the chain link of different pitches through inserting the interval of logical portion before and after changing.The size of chain link itself also can be according to pitch change or constant.The quantity of 2 kinds of pitches (chain link) can be identical also can be different, the quantity of a kind of pitch (chain link) can be 2 times to 5 times of another kind of quantity.In addition, also can with its quantity of the quantity corresponding mode of chain pin group decision, certainly, can be not do not decide this quantity according to the quantity of chain pin group yet.
If the contacting part of the 1st chain pin when chain is straight line and the 2nd chain pin is an initial point; The rectilinear direction of chain is the x axle; Perpendicular direction is the y axle; The chain pin tangent direction on the 1st chain pin of chain curve part and the contact position of the 2nd chain pin and the angle of y axle are γ, and the radius of the basic circle of circle involute curve is Rb, then: can draw following formula:
x＝Rb·(sinγ-γ·cosγ)
y＝Rb·(cosγ+γ·sinγ)-Rb
Under situation about using with chain as auto continuously variable transmission (CVT); If the least radius of the chain curved portion when using chain to use as auto continuously variable transmission (CVT) is R; The gear ratio of auto continuously variable transmission (CVT) is made as r, and the following relationship formula is set up:
Rb＝k·R
0.25＜k＜2r
Promptly; In following formula, select 2 kinds of (also can be more than 3 kinds as required) involute curves any involute curve between the involute curve (upper limit curve that is allowed) of the involute curve (lower limit curve that is allowed) during preferably from k=0.25 during to k=2r.
x＝k·R·(sinγ-γ·cosγ)
y＝k·R·(cosγ+γ·sinγ)-k·R
The track that the track that the contact of rolling is moved is not limited to the contact position of the 1st chain pin and the 2nd chain pin is the situation of circle involute curve, the non-involute curve (with the similar curve of involute) between the involute curve (upper limit curve that is allowed) when involute curve when also can be k=0.25 (curve that rolls off the production line that is allowed) and k=2r.
Any chain pin in the 1st chain pin and the 2nd chain pin; Contact the chain pin (below be referred to as " chain pin ") of an end in the time of can becoming this chain and be used to auto continuously variable transmission (CVT) with friction wheel; Another chain pin then becomes the chain pin (be referred to as " intermediate piece " or " dismounting panel ", below be referred to as " intermediate piece ") that does not contact an end with friction wheel.
The preceding portion of leading to that inserts of chain pin; Constitute by chain pin fixing part that is used for fixing chain pin and intermediate piece movable part that intermediate piece is inserted wherein movably; Chain pin back inserted logical portion, is made up of the intermediate piece fixing part that makes chain pin insert chain pin movable part wherein movably and to be used for fixing intermediate piece.The front and back through hole that be separated from each other of the portion of leading to on chain link, forming inserted in front and back, can make preceding through hole=preceding slotting logical portion of the portion of leading to or back through hole=back that inserts; A through hole of length before and after also can on chain link, forming makes the front portion=preceding rear portion=back of inserting logical portion or through hole of through hole insert logical portion.
In addition, in specification of the present invention, with chain link distolateral being set at of length direction before, and with after its another distolateral being set at; This fore-and-aft direction be merely convenient for the purpose of and set, this is not to mean that the zip length direction is always consistent with fore-and-aft direction.
In power transmission chain of the present invention, the quantity of the chain pin group that the track that the contact of rolling is moved is different at least also will be more than 2 groups.If increase the different group number of track, then can increase the cost of manufacturing, more in addition, because no ratio relation between effect and the group number, therefore, the group number of the chain pin that track is different is just enough below 5 groups.Even the quantity of the chain pin group that track is different is merely 2 kinds, through its random arrangement is arranged, also can avoid resonance because of polygonal vibration initiation, therefore, can significantly reduce the noise that causes by chain.
In addition, the quantity of pitch different links at least will be more than 2.Apart from change at random, can avoid the concentration of energy that impact force caused between chain pin and the friction wheel through the envoy.
If the envoy apart from increase, can make amplitude and entrance angle increase, the tendency that vibration increases will appear like this, and therefore, when pitch is big, preferably strengthens the radius of basic circle, and then entrance angle is reduced.Can increase manufacture cost if the kind quantity of pitch increases, in addition, because no ratio relation between effect and the group number, therefore, the kind quantity of pitch is just enough below 5 kinds.Even pitch is 2 kinds, arrange through the different chain pin group of track being carried out random arrangement, simultaneously pitch is carried out random arrangement and arrange, the resonance that also can greatly avoid the polygonal vibration to be caused.
In above description, when the chain link random arrangement of difform chain pin group and different pitches is arranged, preferably to satisfy one of following 4 conditions (best 2 more than the condition).
A) when being benchmark with the arbitrfary point, the configuration number of permutations of key element of the same race does not appear in ± 5% scope.
B) farthest dispose more than 3 times of the configuration number of permutations that the number of permutations does not surpass existing minimum degree.
C) comprise that the kind of the continuous configuration number of permutations of the key element of the same race of key element of the same race will be above 3 kinds.
D) have below 60 ° configuration pattern of rows and columns the rotary symmetry part can not surpass all 50%.
In specification of the present invention, so-called " configuration is at random arranged ", in the narrow sense; Mean at least 1 condition that will satisfy in above-mentioned 4 conditions, for example, the configuration of so-called abbabb arranged only be arranged on a place; Place outside this is sentenced is at A) under the condition situation about setting up, also should regard it as random arrangement and arrange; In " random arrangement arrangement "; Each key element presents the situation of aperiodicity or no regularity arrangement on the whole, and this is mathematical, and only the few part in integral body has periodically and regularity.
Power transmission chain is made up of the chain link more than 2 kinds; For example the track of the 1st chain pin of this chain link and the contact position of the 2nd chain pin is that circle involute shape and pitch are different, and the radius of the basic circle of little its involute of chain link of the radius ratio pitch of the basic circle of big its involute of chain link of pitch is big.
Power transmission chain comprises a plurality of chain links and a plurality of the 1st chain pin and the 2nd chain pin; Said chain link has can make chain pin insert the slotting logical portion in logical front and back wherein; Said chain pin is inserted the portion of leading to corresponding mode connecting link after inserting logical portion and another chain link with a certain chain link preceding; So that can be crooked each other on its length direction at side by side chain link on the chain width direction; Contact relative to rolling with the 2nd chain pin through the 1st chain pin and to move; Can make each chain link crooked in the longitudinal direction each other, the 1st chain pin is fixed on a certain chain link, and preceding inserting is inserted in the back of another chain link simultaneously movably and inserts in the logical portion in the logical portion, and preceding inserting is fixed on the back of another chain link simultaneously and inserts in the logical portion in the logical portion and the 2nd chain pin is inserted in a certain chain link movably; In said power transmission chain, it is height=5～20 of the Base radius/chain pin of circle involute and involute that the rolling of the 1st chain pin and the 2nd chain pin contacts the track that moves.
Through increasing the Base radius of involute, entrance angle is reduced, the effect of utilizing this entering angle to reduce can reduce the vibration and the noise of chain.In auto continuously variable transmission, the height of chain pin is about 4 to 20mm; Base radius is its 5～20 times preferably, and more preferably 9～17 times, 11～15 times of the bests.The height of the 1st chain pin and the 2nd chain pin is almost equal; Can select the chain pin of any chain pin for use, still, say tightlyer as benchmark; Should select long chain pin, promptly that chain pin of contacting with the coniform pulley face of the friction wheel of stepless speed variator of end face is as benchmark.The track of the contact position of the 1st chain pin and the 2nd chain pin should be circle involute; Simultaneously, should make Base radius/chain pin height=5～20 of involute, even be under a kind the situation in the chain pin group; Also can suppress the polygonal vibration effectively, so just can remove the principal element that produces noise.
For this formation of Base radius/chain pin height=5～20 of involute, through making chain pin group and 2 kinds of power transmission chains combinations, can suppress the polygonal vibration effectively, therefore, can remove the principal element of generation noise.
Track for the contact position between the mobile chain pin of the contact of rolling against each other is round involute curve; For example; The surface of contact of a certain chain pin is had comprise radius on its cross section is the shape of involute of the basic circle of Rb, is plane (sectional shape is a straight line) and make the surface of contact of another chain pin.
Even the surface of contact of 2 chain pins all is a curved surface; The track of chain pin contact position each other also can become the circle involute curve; For example, also can make the section shape of the 1st chain pin and the 2nd chain pin identical so that the track of the contact position of the 1st chain pin and the 2nd chain pin is the circle involute curve.In this case; The cross section curve g2 (y) of the surface of contact of the cross section curve g1 (y) of the surface of contact of chain pin one side and intermediate piece one side is expressed as Lx=f (y) in the relative distance of x direction (x) is the coordinate of chain direct of travel; Y is a radial coordinate) time; Then: g1=-g2, and Lx is the circle involute curve.
In above-mentioned power transmission chain, preferably make a certain chain pin (intermediate piece) shorter than another chain pin, like this, long chain pin will contact with the coniform pulley face of the friction wheel of stepless speed variator, utilize the frictional force of this contact to come transferring power.Each belt pulley all is made up of fixed friction wheel and removable friction wheel; Said fixed friction wheel has conical pulley face; Said removable friction wheel has the conical pulley face relative with the pulley face of fixed pulley, and chain is clamped between the pulley face of two pulleys, through hydraulic unit driver removable pulley is moved; Cause distance and the winding radius of chain between the belt wheel face of stepless speed variator to change, so just can realize moving smooth-going stepless change.
Actuating unit of the present invention has the 1st friction wheel, the 2nd friction wheel and power transmission chain; Said the 1st friction wheel has conical pulley face; Said the 2nd friction wheel has conical pulley face; Said power transmission chain is around hanging on said the 1st friction wheel and said the 2nd friction wheel, and power transmission chain is expressed in above-mentioned in any one.
The stepless speed variator that this actuating unit is suitable as automobile uses.
Description of drawings
Fig. 1 is the plan view of the part of power transmission chain of the present invention.
Fig. 2 is above-mentioned amplification stereogram with a part.
Fig. 3 is above-mentioned side view with a part.
Fig. 4 is the schematic diagram of the Base radius of explanation surface of contact.
Fig. 5 is the movement locus schematic representation of chain pin.
Fig. 6 is the acoustic pressure energy level plotted curve of pitch such as employing configuration when arranging.
Fig. 7 is the schematic representation of one of difform chain pin random arrangement arrangement example.
Fig. 8 is the schematic representation of one of difform chain link random alignment configuration example.
Fig. 9 (a) and (b), (c) are the charts of one of Base radius and the random alignment configuration of power transmission chain of the present invention example.
Figure 10 (a) and (b), (c) are the charts of one of pitch and the Base radius random alignment configuration of power transmission chain of the present invention example.
Figure 11 (a) is the plotted curve of expression amplitude and pitch relation; (b) be the plotted curve of expression entrance angle and pitch relation.
Figure 12 (a) is the plotted curve of expression amplitude and Base radius relation; (b) be the plotted curve of expression entrance angle and Base radius relation.
Figure 13 is the schematic representation of the chain pin state before and after the power transmission chain engagement of the present invention.
Figure 14 is the schematic representation of the scope of the preferred surface of contact shape of the chain pin of power transmission chain of the present invention.
Figure 15 is the schematic representation that is equivalent to the different mode of executions of power transmission chain of the present invention among Fig. 3.
Figure 16 (a) and (b) are schematic representation of mode of execution of the different chain link shapes of power transmission chain of the present invention.
Figure 17 is the plan view that the expression power transmission chain is installed in the state of friction wheel.
Figure 18 is the stereogram that power transmission chain of the present invention is applied to one of stepless speed variator example.
Embodiment
Below, with reference to accompanying drawing, describe with regard to mode of execution of the present invention.In following explanation, before the left side among Fig. 3 is defined as, after the right side among Fig. 3 is defined as.
Fig. 1 and Fig. 2 are the schematic representation of a power transmission chain part of the present invention; Power transmission chain 1 has a plurality of chain links 11 and a plurality of chain pin (the 1st chain pin) 14 and intermediate piece (the 2nd chain pin) 15; Wherein, Said chain link has the front and back that on the chain length direction, are provided with by predetermined distance and inserts logical portion 12,13; Said chain pin (the 1st chain pin) and intermediate piece (the 2nd chain pin) will be at chain link arranged side by side on the chain width direction 11 can crooked each other mode interconnect on its length direction.
As shown in Figure 3; Preceding slotting logical portion 12 is made up of chain pin fixing part 12a and intermediate piece movable part 12b; Wherein, said chain pin fixing part 12a is used for fixing chain pin 14 (solid line is represented), and said intermediate piece movable part 12b is used for embedding movably intermediate piece 15 (double dot dash line is represented); The back is inserted logical portion 13 and is made up of chain pin movable part 13a and intermediate piece fixing part 13b, and wherein, said chain pin movable part 13a is used for embedding movably chain pin 14 (double dot dash line is represented), and said intermediate piece fixing part 13b is used for fixing intermediate piece 15 (solid line is represented).And; On being connected the chain width direction during chain link 11 arranged side by side; The preceding back slotting logical portion 13 that inserts logical portion 12 and another chain link 11 of certain chain link 11 is overlapped each other in a corresponding way; Chain pin 14 is fixing and insert in the logical portion 13 movably at another chain link 11 back that mode is embedded into wherein simultaneously to insert at a certain chain link 11 preceding in the logical portion 12, and intermediate piece 15 passes mode fixing in the portion 13 in the back insertion of another chain link 11 simultaneously and inserts wherein inserting to move in the logical portion 12 at a certain chain link 11 preceding.Like this, move relative to rolling to contact with intermediate piece 15, make chain link 11 bending each other on its length direction (fore-and-aft direction) through this chain pin 14.
Is circle involute shape with chain pin 14 as the track of the contact position of chain pin of benchmark 14 and intermediate piece 15; In this mode of execution; As shown in Figure 4; The surface of contact 14a of chain pin 14 has that radius is that Rb, center are the involute shape of the basic circle of M in its section, and the surface of contact 15a of intermediate piece 15 then is plane (section shape is a straight line).Like this; When each chain link 11 from the straight section of chain 1 to circular arc portion or from circular arc portion when straight section moves; Insert in the logical portion 12 preceding; Intermediate piece 15) roll at the surface of contact 14a place of chain pin 14 contact (in fact strict) and moving of chain pin 14 its surface of contact 15a that are in stationary state relatively at the movable part 12b of intermediate piece for comprising the rolling contact (rolling sliding contact) of some sliding contacts; Insert in the logical portion 13 in the back; Intermediate piece 15 its surface of contact 14a that chain pin 14 is in stationary state relatively roll at the surface of contact 15a place of intermediate piece 15 contact (in fact strict) for comprising the rolling contact (rolling sliding contact) of some sliding contacts and in chain pin movable part 13a, move to.In addition, in Fig. 3, symbol A and B institute sign place are the Line of contact (on section, being point) of chain pin 14 and intermediate piece 15 in chain 1 straight section, and the distance between the AB is decided to be pitch in this manual.
In this power transmission chain 1, can produce the polygonal vibration that is accompanied by chain pin movement locus shown in Figure 5.In Fig. 5; Move to the engaging position of the circular arc shaped portion that contacts with friction wheel from straight section at chain pin (representing) by quadrilateral; The tangent direction of friction wheel and chain pin incision direction are inconsistent (angle between the two direction each other are an entrance angle), and chain pin simultaneously moves downward one side and contacts with friction wheel.The downward amount of movement of chain pin is represented with the initial engagement location variation when contacting with friction wheel.The chain pin that is in straight section also can receive the influence that the chain pin that is in engaging position place moves downward and move up and down, and this amount of moving up and down constitutes amplitude.Because moving up and down repeatedly of this chain pin is so produced the polygonal vibration.
Because chain pin 14 is done to move relative to rolling to contact with intermediate piece 15; Simultaneously, be circle involute with chain pin 14 as the track of the chain pin of benchmark 14 and the contact position of intermediate piece 15, therefore; The situation that is all arc surface with the surface of contact of chain pin and intermediate piece is compared, and can reduce above-mentioned amplitude.But, as shown in Figure 6 under the situation of the measure of not implementing to alleviate vibration even this formation but is same kind with chain link 11, chain pin 14 and intermediate piece 15, can produce the peak value of higher sound pressure level, this will make the people experience noise.Therefore, even the track of contact position is arranged to the device of circle involute, people's expectation can further reduce multidirectional periodic vibration.
Here; In power transmission chain of the present invention; Should whole chain link 11, chain pin 14 and intermediate piece 15 not processed same shape; For fear of producing the resonance that causes because of the polygonal vibration, as shown in Figure 7, can use multiple chain pin 14A, 14B and intermediate piece 15A, 15B group with different Base radius R1 or R2; In addition, as shown in Figure 8, preferred chain link 11A, the 11B that use with different pitch P1 or P2.
In the 1st mode of execution of power transmission chain 1 according to the invention, shown in Fig. 9 (c), in identical pitch P1, to have an identical Base radius R1 opposite with existing glide chain link, chain pin and intermediate piece; Shown in Fig. 9 (a), the present invention has used 2 kinds of chain pin 14A, 14B shown in Figure 7, and pitch P1 is identical; Simultaneously, if the Base radius of the involute of the 1st group of chain pin 14A is R1, then the Base radius of the involute of the 2nd group of chain pin 14B is R2; The Base radius of the involute of the 3rd group of chain pin 14B is R2; The Base radius of the involute of the 4th group of chain pin 14A is R1, and so, the big young pathbreaker of basic circle changes and arranges by irregular order (randomly) configuration.
In addition, in the 2nd mode of execution of power transmission chain 1 according to the invention, shown in Fig. 9 (b); Use 3 kinds of chain pins (figure slightly), pitch P1 is identical, meanwhile; If the Base radius of the involute of the 1st group of chain pin is R1, and the Base radius of the involute of the 2nd group of chain pin is R2, the Base radius of the involute of the 3rd group of chain pin is R1; The Base radius of the involute of the 4th group of chain pin is R3, and the big young pathbreaker of basic circle changes and arranges by irregular order (randomly) configuration so.
In another mode of execution of power transmission chain 1 of the present invention; Shown in Figure 10 (c); When pitch P1 is identical, to have an identical Base radius R1 opposite with existing whole chain links, chain pin and intermediate piece, and shown in Figure 10 (a) and (b), pitch is by randomization; Corresponding therewith, change has also taken place in Base radius.
In the 3rd mode of execution of power transmission chain 1 of the present invention; Shown in Figure 10 (a), 2 kinds of chain link 11A shown in Figure 8,11B and 2 kinds of chain pin 14A, 14B and intermediate piece 15A, 15B shown in Figure 7 have been adopted, if the pitch of the 1st chain link 11A is P1; And the pitch of the 2nd chain link 11B is P2; The pitch of the 3rd chain link 11B is P2, and the pitch of the 4th chain link 11A is P1, and the length of pitch will change and will arrange by irregular (at random) arranged in order so.In addition, be under the situation of P1 in pitch, the Base radius of the involute of chain pin 14A is R1; In pitch is under the situation of P2, the Base radius of the involute of chain pin 14B be R2 (still, when P1＜P2, R1＜R2).
In the 4th mode of execution of power transmission chain 1 of the present invention, shown in Figure 10 (b), 3 kinds of chain links, chain pin and intermediate pieces (figure slightly) have been adopted; If the pitch of the 1st chain link is P1, and the pitch of the 2nd chain link is P2, the pitch of the 3rd chain link is P1, and the pitch of the 4th chain link is P3, and the length of pitch will change and arrange by irregular (at random) arranged in order so.In addition, be under the situation of P1 in pitch, the Base radius of the involute of chain pin is R1; In pitch is under the situation of P2, and the Base radius of the involute of chain pin is R2; In pitch is under the situation of P3, and the Base radius of the involute of chain pin is R3, (still, when P1＜P2＜P3, R1＜R2＜R3).
Again in addition, about the relation of pitch and basic circle, when P1＜P2, needn't satisfy the condition of R1＜R2; When P1＜P2, even R1＞R2 also can obtain same effect.Therefore, when the envoy when increasing, shown in Figure 11 (a), amplitude will increase, meanwhile, shown in Figure 11 (b), entrance angle also will increase; Because the increase of amplitude and entering angle is with producing the shortcoming that vibration increases.
Relation between relevant Base radius, amplitude and the entrance angle is shown in Figure 12 (b), even Base radius increases; Amplitude can not increase too much yet, in addition, and shown in Figure 12 (a) and (b); If increase Base radius, can make entrance angle reduce the result; Through increasing Base radius, be accompanied by reducing of entrance angle, vibration can be improved.Here, in the power transmission chain 1 of the 3rd and the 4th mode of execution, R1＜R2＜R3 when R1＜R2 or P1＜P2 when P1＜P2＜P3 for coarse pitch, can make Base radius increase and entering angle is reduced; Like this, can eliminate the shortcoming of following the pitch increasing to be brought.In addition, in Figure 12, the size of the big turning radius is R=73.859, and small swing radius is R=31.65.In addition, in the figure, be under the situation of 6mm at the chain pin height, preferably make Rb＞51mm, more preferably make Rb >=70mm.
The shape of involute can be expressed as, x=Rb (sin γ-γ cos γ) or y=Rb (cos γ+γ sin γ)-Rb, and wherein: Rb is a Base radius, and γ is an angle, the length of establishing involute shape is Le (γ), then Le (γ)=∫ (x
2+ y
2)
1/2D γ, to this formula from γ=0 to the γ integration, can get Le (γ)=Rb γ
2/ 2.When the height h of chain pin is directly proportional with the length of Le, with a as scaling factor, h=a * Le=a Rb γ then
2/ 2.
From this formula, can draw h also is directly proportional with Rb.For the chain pin that uses in the inorganic speed changer of automobile, preferably it highly is h=4～20mm, Rb/h=5～20; More preferably Rb/h=9～17; Rb/h=11～15 are optimum range.
When making the power transmission chain 1 in the 3rd mode of execution and the 4th mode of execution; Can the surface of contact 14a of chain pin 14A be formed and have the involute shape that radius is the basic circle of R1; The surface of contact 14a of chain pin 14B formed have the involute shape that Base radius is R2; Can be made into that to insert logical portion 12,13 shapes identical but logical portion 12,13 is inserted in front and back each other at interval (therefore; Also be pitch) different 2 kinds of chain link 11A, 11B, carry out appropriate combination with these 2 kinds of chain link 11A, 11B and 2 kinds of chain pin 14A, 14B again and it be connected to each other.
Power transmission chain 1 in above-mentioned each mode of execution; Because the track of its contact position is an involute curve; Shown in figure 13, though the engagement of chain pin 14,15 and friction wheel, because the moving direction of chain 1 is in the figure on the direction by the straight line L shown in the dot and dash line; Therefore, can be in minimum zone by the polygonal vibration suppression of moving the chain 1 that is caused of extremely meshing the position, back from the initial engagement position.In addition, in the 1st mode of execution and the 2nd mode of execution, the track of the contact position of the 1st chain pin 14A, 14B and the 2nd chain pin 15A, 15B is a circle involute; And through 2 kinds of chain pins that the involute Base radius is different, promptly the 1st chain pin 14A, 14B and the 2nd chain pin 15A, 15B are set to group; Simultaneously; These chain pins 14A, 14B, 15A, 15B group random arrangement are arranged, can make the cycle phase shift of bump sounding, thereby acoustic energy is dispersed on the different frequency bands; Therefore, can reduce the peak value of acoustic pressure energy level.In addition, in the 3rd mode of execution and the 4th mode of execution, the track of the contact position of the 1st chain pin 14A, 14B and the 2nd chain pin 15A, 15B is a circle involute; And; Different 2 kind of the 1st chain pin 14A, 14B and the 2nd chain pin 15A, the 15B of involute Base radius is set to group in addition, and meanwhile, 2 kinds of chain link 11A that these pitches are different, 11B random arrangement are arranged; Therefore, can further reduce the peak value of acoustic pressure energy level.Like this, because its acoustic energy is dispersed on the different frequency bands, therefore, peak value sharp-pointed among Fig. 6 is significantly reduced, thereby reduced the noise of people institute perception.
In Figure 13, establish: the center with the curved portion of chain is an initial point, and the direction of the straight section of chain is the X axle, and perpendicular direction is the Y axle, and the angle of line between the roll center of the chain pin of the curved portion of initial point and chain and Y axle is θ.In addition; Contacting part between chain pin 14A when chain is straight line, 14B and the intermediate piece 15 is as initial point; The rectilinear direction of chain is the x axle, and perpendicular direction is the y axle, when the chain pin tangent direction at the contact position place of the chain pin 14A of the curved portion of chain, 14B and intermediate piece 15 and the angle of Y axle are γ; The radius of basic circle is made as Rb, and then the circle involute curve can be explained with following formula:
x＝Rb·(sinγ-γ·cosγ)
y＝Rb·(cosγ+γ·sinγ)-Rb
Base radius Rb for example is the least radius when using with chain as auto continuously variable transmission (CVT).
The involute curve of corresponding different Base radius has does not have several, even change Base radius, can keep effect same yet, and therefore, as the least radius of auto continuously variable transmission (CVT) with chain, the allowed band of involute curve can be explained with following formula with R:
x＝k·R·(sinγ-γ·cosγ)
y＝k·R·(cosγ+γ·sinγ)-k·R
Here, the chain curved portion least radius in the time of will using with chain as auto continuously variable transmission (CVT) is made as R, and the gear ratio of auto continuously variable transmission (CVT) is made as r, then preferably k is arranged in the following scope:
0.25＜k＜2r
That is to say; Shown in figure 14; Select the involute curve of 2 kinds (can be as required more than 3 kinds) any involute curve between the involute curve (upper limit curve of permission) when involute curve (lower limit curve of permission) in the time of can be from k=0.25 and k=2r, so just can reduce noise.
The track that the contact of rolling is moved; The contact position track that is not limited to the 1st chain pin and the 2nd chain pin is the circle involute curve, the non-involute curve between the involute curve (upper limit curve of permission) when involute curve in the time of also can selecting k=0.25 (lower limit curve of permission) and k=2r (with the similar curve of involute curve).
Above-mentioned power transmission chain is used in the auto continuously variable transmission shown in Figure 180 (CVT); At this moment; Shown in figure 17, intermediate piece 15 is shorter than chain pin 14, at each conical pulley face 2c of the fixed pulley 2a of the end face of intermediate piece 15 and friction wheel 2 and removable pulley 2b, 2d not under the state of contact; The end face of chain pin 14 contacts with conical pulley face 2c, the 2d of friction wheel 2, comes transferring power through the frictional force that this contact produced.As stated, move because chain pin 14 is done to roll to contact with intermediate piece 15, therefore, pulley face 2c, the 2d of chain pin 14 relative friction wheels 2 rotate hardly, thereby have reduced frictional loss, have guaranteed higher transmission efficiency.
Moreover; When each mode of execution to above-mentioned power transmission chain 1 describes; Chain link shown in Figure 3 11, front and back are inserted the use of leading to portion 12,13, chain pin 14 and intermediate piece 15 and are described; The shape of chain link 11, front and back slotting logical portion 12,13, chain pin 14 and intermediate piece 15 is not limited to shown in Figure 3, can in the scope that the contact of rolling is moved, carry out various variations at the two.This mode of execution such as Figure 15 and shown in Figure 16.
In the mode of execution of Figure 15; Power transmission chain 1 comprises: a plurality of chain link 21, a plurality of chain pin (the 1st chain pin) 24 and intermediate piece (the 2nd chain pin) 25; Wherein, Said chain link has on the chain length direction front and back that are provided with by predetermined distance and inserts logical portion 22,23, said chain pin (the 1st chain pin) and intermediate piece (said the 2nd chain pin) with can be on its length direction at side by side chain link 21 on the chain width direction each other the mode of bending be connected mutually; These chain links 21, chain pin 24 and intermediate piece 25 are by such assembling illustrated in figures 1 and 2.Front and back are inserted logical portion 22,23 and are arranged to symmetric figure, and chain pin 24 is processed identical cross section with intermediate piece 25, uses identical mould to process through drawing.
Preceding slotting logical portion 22 is made up of chain pin fixing part 22a and intermediate piece movable part 22b; Said chain pin fixing part is used for fixing chain pin 24 (shown in the solid line); Said intermediate piece movable part is used for embedding movably intermediate piece 25 (representing with double dot dash line); The back is inserted logical portion 23 and is made up of chain pin movable part 23a and intermediate piece fixing part 23b, and said chain pin movable part is used for inserting movably chain pin 24 (representing with double dot dash line), and said intermediate piece fixing part is used for fixing intermediate piece 25 (representing with solid line).Because chain pin 24 has identical sectional shape with intermediate piece 25, therefore, the chain pin fixing part 22b of preceding slotting logical portion 22 inserts the intermediate piece fixing part 23b that leads to portion 23 with the back and is of similar shape (symmetric shape).In addition; On being connected the chain width direction during chain link 21 arranged side by side; Chain link 21 overlaps each other with preceding back slotting logical portion 23 corresponding mode of inserting logical portion 22 and another chain link 21 of a certain chain link 21, and chain pin 24 is fixed on the preceding of a certain chain link 21 and inserts in the logical portion 22, and is inserted into movably in the back slotting logical portion 23 of other 1 chain link 21; Intermediate piece 25 is inserted into the preceding of a certain chain link 21 movably and inserts in the logical portion 22, and is fixed on back slotting the leading in the portion 23 of 1 chain link 21 in addition.In addition, through moving relative to the rolling contact between this chain pin 24 and the intermediate piece 25, chain link 21 can be gone up crooked each other at its length direction (fore-and-aft direction).
In addition, in above-mentioned each mode of execution, independently through hole is processed separately by the preceding slotting logical portion 13,23 of logical portion 12,22 and back that inserts; Be used for forming the through hole that these insert logical portion 12,22,13,23, can be processed into the shape shown in Figure 16 (a) and (b), concentrate so that slow down the stress at peritreme place.In Figure 16 (a), on chain link 31, form 1 through hole 31a that front and back are long, before constituting, the front portion of through hole 31a inserts the portion 32 of leading to, and the rear portion of through hole 31a constitutes the back and inserts logical portion 33.What through hole 31a formation was shown in Figure 3 inserts the shape that logical portion 12,13 communicates with each other by interconnecting part 34 with front and back, and the shape of logical portion 32,33 is inserted in the front and back shown in Figure 16 (a), identical with the slotting logical portion in front and back 12,13 shapes shown in Figure 3.Therefore, chain pin shown in Figure 3 14 and intermediate piece 15 are combined, can be obtained identical power transmission chain in each mode of execution with above-mentioned power transmission chain 1.The height of interconnecting part 34 for example is about some/one who inserts the height that leads to portion 32,33, shown in Figure 16 (a), can not cause the motion of chain pin in the dysgenic scope, and the height that also can make interconnecting part 34 is near the height of inserting logical portion 32,33.In Figure 16 (b), form 1 through hole 31b that front and back are long on the chain link 31, before constituting, the front portion of through hole 31b inserts the portion 32 of leading to, and the rear portion of through hole 31b constitutes the back and inserts logical portion 33.Through hole 31b constitutes and shown in Figure 3 by interconnecting part 35 shape that logical portion 12,13 communicates with each other to be inserted in front and back, and the shape of passing portion 32,33 is inserted in the front and back shown in Figure 16 (b), inserts with front and back shown in Figure 3 that to pass portion's 12,13 shapes identical.Like this, chain pin shown in Figure 3 14 and intermediate piece 15 are combined, can be obtained identical power transmission chain in each mode of execution with above-mentioned power transmission chain 1.
The possibility of commercial Application
Power transmission chain of the present invention can suppress the polygonal vibration; Like this, can eliminate the main cause that produces noise, therefore; When the actuating unit of the automobile that it is used in stepless speed variator for example etc., the quiet property that can improve automobile with improve car comfort.
Claims (3)
1. power transmission chain; Comprise: a plurality of chain links and a plurality of the 1st chain pin and the 2nd chain pin, wherein, said chain link has can make chain pin insert the slotting logical portion in logical front and back wherein; Said chain pin; Afterwards insert the logical corresponding mode connecting link of portion so that can be crooked each other on its length direction at side by side chain link on the chain width direction with what a certain chain link preceding inserted logical portion and another chain link, the 1st chain pin is fixed on a certain chain link precedingly inserts logical portion and is inserted in the back of another chain link simultaneously movably and inserts in the logical portion, precedingly inserts the back portion of leading to that inserts that logical portion is fixed on another chain link simultaneously and the 2nd chain pin is inserted into a certain chain link movably; Through between the 1st chain pin and the 2nd chain pin relative to rolling contact and move; Make the chain link each other in the longitudinal direction can be crooked, it is characterized in that
The 1st chain pin and the 2nd chain pin contact the chain pin group that the track that moves has nothing in common with each other relative to rolling should have 2 kinds, and these chain pin groups to be random arrangement arrange,
Form 2 kinds of different chain links of pitch, and with these chain link random arrangement,
Pitch about chain link; Use two kinds of the big P2 of little P1 of pitch and pitch, and the track of the contact position of the 1st chain pin and the 2nd chain pin is a circle involute shape; Base radius about the circle involute of chain pin; Use two kinds of the big R2 of little R1 of radius and radius,, can be combined into four kinds of combinations of P1 and R1, P1 and R2, P2 and R1 and P2 and R2 about the combination of chain link and chain pin; Big through the envoy apart from the Base radius of the Base radius of big its involute of chain link its involute of chain link littler than pitch, constitute chain for two kinds by P1 and R1 and P2 and R2.
2. power transmission chain as claimed in claim 1 is characterized in that, the height of the Base radius/chain pin of involute=5～20.
3. actuating unit; It is characterized in that; Comprise: the 1st friction wheel, the 2nd friction wheel and around the power transmission chain that hangs on said the 1st friction wheel and said the 2nd friction wheel; Said the 1st friction wheel has conical pulley face, and said the 2nd friction wheel has conical pulley face, and said power transmission chain is claim 1 or 2 described power transmission chains.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP368547/2003 | 2003-10-29 | ||
| JP368543/2003 | 2003-10-29 | ||
| JP2003368543 | 2003-10-29 | ||
| JP2003368547 | 2003-10-29 | ||
| JP2004176377 | 2004-06-15 | ||
| JP176377/2004 | 2004-06-15 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800323642A Division CN100439749C (en) | 2003-10-29 | 2004-10-29 | Power transmission chain and power transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101319701A CN101319701A (en) | 2008-12-10 |
| CN101319701B true CN101319701B (en) | 2012-02-29 |
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ID=37484922
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101095906A Expired - Fee Related CN101319701B (en) | 2003-10-29 | 2004-10-29 | Power transmission chain and power transmission device |
| CNB2004800323642A Expired - Fee Related CN100439749C (en) | 2003-10-29 | 2004-10-29 | Power transmission chain and power transmission device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800323642A Expired - Fee Related CN100439749C (en) | 2003-10-29 | 2004-10-29 | Power transmission chain and power transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN101319701B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5211606B2 (en) * | 2007-09-25 | 2013-06-12 | 株式会社ジェイテクト | Power transmission chain and power transmission device |
| US20100279805A1 (en) * | 2007-09-27 | 2010-11-04 | Shigeo Kamamoto | Power transmission chain and power transmission system |
| JP5136838B2 (en) * | 2007-11-07 | 2013-02-06 | 株式会社ジェイテクト | Power transmission chain |
| DE112008003286A5 (en) * | 2007-12-18 | 2010-09-09 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Tab for a cradle link chain |
| FR2978221B1 (en) * | 2011-07-22 | 2014-03-14 | Cyril Lilian Lucien Clopet | POWER TRANSMISSION MECHANISM FOR ROTATION. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4650445A (en) * | 1985-02-20 | 1987-03-17 | Borg-Warner Automotive, Inc. | Chain-belt |
| US5427583A (en) * | 1993-09-10 | 1995-06-27 | P.I.V. Antrieb Werner Reimers Gmbh & Co. Kg | Low-noise, triple side bar sprocket chain for infinitely variable transmission |
| JP2624548B2 (en) * | 1989-11-10 | 1997-06-25 | アイシン・エィ・ダブリュ株式会社 | Endless transmission belt |
| US5728021A (en) * | 1995-05-03 | 1998-03-17 | Gear Chain Industrial B.V. | Transmission chain for a cone pulley transmission |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522666Y2 (en) * | 1987-06-18 | 1993-06-10 |
-
2004
- 2004-10-29 CN CN2008101095906A patent/CN101319701B/en not_active Expired - Fee Related
- 2004-10-29 CN CNB2004800323642A patent/CN100439749C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4650445A (en) * | 1985-02-20 | 1987-03-17 | Borg-Warner Automotive, Inc. | Chain-belt |
| JP2624548B2 (en) * | 1989-11-10 | 1997-06-25 | アイシン・エィ・ダブリュ株式会社 | Endless transmission belt |
| US5427583A (en) * | 1993-09-10 | 1995-06-27 | P.I.V. Antrieb Werner Reimers Gmbh & Co. Kg | Low-noise, triple side bar sprocket chain for infinitely variable transmission |
| US5728021A (en) * | 1995-05-03 | 1998-03-17 | Gear Chain Industrial B.V. | Transmission chain for a cone pulley transmission |
Non-Patent Citations (1)
| Title |
|---|
| JP平5-22666Y2 1993.06.10 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101319701A (en) | 2008-12-10 |
| CN1875206A (en) | 2006-12-06 |
| CN100439749C (en) | 2008-12-03 |
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