CN106917851B - Bath main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet - Google Patents

Bath main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet Download PDF

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CN106917851B
CN106917851B CN201710191398.5A CN201710191398A CN106917851B CN 106917851 B CN106917851 B CN 106917851B CN 201710191398 A CN201710191398 A CN 201710191398A CN 106917851 B CN106917851 B CN 106917851B
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circular
tibet
synchronous pulley
bath main
main officer
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CN106917851A (en
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孙新城
陈建能
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Zhejiang Industry Polytechnic College
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/02Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/10Geometric CAD
    • G06F30/17Mechanical parametric or variational design

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Abstract

The invention discloses Bath main officer of Tibet it is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet.The present invention initially sets up the pitch curve equation of synchronous belt principal and subordinate wheel, and utilizes and cut polar coordinates theoretical calculation principal and subordinate wheel transmission ratio;Then the perimeter for calculating synchronous belt obtains the parameters of non-circular tensioning synchronous pulley pitch curve by iterative algorithm according to the variation of synchronous belt perimeter slack.Tensioning wheel in the present invention is the non-circular synchronous pulley of free pitch curve, can overcome the problems, such as that the non-circular V belt translation of traditional two-wheeled cannot meet non-at the uniform velocity transmission and real-time tensioning simultaneously with belt sag variable quantity synchronous in real-time compensation transmission process;Generation circular diameter, length, denaturation coefficient and the order of the non-circular pitch curve of Bath main officer of Tibet are controlled variable, and by the shape of four non-circular pitch curves of parameter regulation Bath main officer of Tibet, the transmission ratio of wider range may be implemented, and meet more specific non-at the uniform velocity transmissions and require.

Description

Bath main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet
Technical field
The present invention relates to a kind of design methods of non-circular toothed belt transmission, and in particular to self-compensating bar of one kind amount of becoming slack This main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet.
Background technique
Transmission mechanism changes the forms of motion and speed of input and output component, to meet different operating environmental requirement, In non-uniform transmission mechanism occupy extremely important status, common are link mechanism, cam mechanism, non-circular gear mechanism etc..Phase For link mechanism and cam mechanism, non-circular gear mechanism has compact-sized, stable drive, transmitting power larger, easy to be real The advantages that existing dynamic balancing, therefore it has been successfully applied to machining tool, automation, transport, instrument and meter, pump class, flowmeter, spinning On loom tool and agricultural machinery.But non-circular gear drive, which is only suitable for center, non-to be at the uniform velocity driven away from smaller, lubrication are convenient Occasion, therefore be suitable for big center and be driven away from the non-circular flexible element (band/chain) of, the inconvenient and low manufacturing cost occasion of lubrication to meet the tendency of And it gives birth to.Wherein non-circular chaindriven polygon effect is obvious, therefore when having strict demand to non-at the uniform velocity transmission ratio changing rule Just it is restricted;Frictional V belt translation common simultaneously cannot be guaranteed accurate transmission ratio rule due to Elastic Sliding.
Current non-round belt (chain) transmission, all only 2 non-circular bands (chain) are taken turns --- and driving wheel and driven wheel are being driven In the process due to its pitch curve be it is non-circular, the slack of band (chain) is real-time change, therefore cannot guarantee work institute simultaneously It is required that non-at the uniform velocity transmission ratio changing rule and band (chain) real-time tensioning.In order to compensate for the band (chain) in transmission in practical application Slack variation, by additional springs with realize tensioning, due in a period of motion its tensile force be variation, and As the amplitude of variation of the aggravation tensile force of non-at the uniform velocity characteristic is bigger, the non-precision being at the uniform velocity driven will affect in turn in this way, and And kinetic characteristics are deteriorated;Therefore in practical projects, non-round belt (chain) transmission is rarely applied to accurately load high-speed drive Occasion.
Summary of the invention
The purpose of the present invention is in view of the above problems, propose the self-compensating Bath main officer of Tibet of one kind amount of becoming slack it is non-circular-Bath main officer of Tibet It is perfect to provide a whole set of for non-circular synchronous pulley in practical applications for non-circular-non-circular three-wheel toothed belt transmission design method Non- at the uniform velocity directly accurate transmission of the big center away between is realized on design theory basis.The design method initially sets up synchronous belt master The pitch curve equation of driven wheel, and synchronous belt pulley transmission ratio is moved using polar coordinates theoretical calculation principal and subordinate is cut;Then synchronous belt is calculated Perimeter, every ginseng of non-circular tensioning synchronous pulley pitch curve is calculated by alternative manner according to the variation of synchronous belt perimeter slack Number.
In order to solve the above technical problems, the technical scheme is that
The specific steps of the present invention are as follows:
Step 1: determining the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet according to transmission rule Pitch curve equation;
The non-circular active synchronization belt wheel of Bath main officer of Tibet is the input link of uniform rotation, cuts polar equation:
In formula, n11For the order of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet, l1For the non-circular active synchronization band of Bath main officer of Tibet Take turns the length of pitch curve, r11、r12The respectively non-circular active synchronization belt wheel pitch curve first segment curve of Bath main officer of Tibet and second segment curve Polar diameter, b1For the generation circular diameter of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet,For the non-circular active synchronization band of Bath main officer of Tibet Take turns pitch curve moving coordinate system x1o1y1Middle x1Axis is to quiet coordinate system xo1The corner of x-axis, m in y11、m12The respectively non-circular master of Bath main officer of Tibet The denaturation coefficient of first segment curve and second segment curve on dynamic synchronous pulley pitch curve.
In formula, p1Diameter, θ are cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet1For p1To moving coordinate system x1o1y1Middle x1 The corner cut of axis, and
The non-circular driven synchronous pulley of Bath main officer of Tibet is output link, and pitch curve cuts polar equation:
In formula, n21For the non-circular driven synchronous pulley pitch curve order of Bath main officer of Tibet, l2For the non-circular driven synchronous pulley of Bath main officer of Tibet The length of pitch curve, r21, r22First segment curve and second segment curve respectively on the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Polar diameter, b2For the generation circular diameter of the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet,For the non-circular driven synchronous belt of Bath main officer of Tibet Take turns pitch curve moving coordinate system x2o2y2Middle x2Axis is to quiet coordinate system xo1The corner of x-axis, m in y21、m22Respectively Bath main officer of Tibet it is non-circular from The denaturation coefficient of first segment curve and second segment curve on dynamic synchronous pulley pitch curve.
In formula, p2Diameter, θ are cut for the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet2For p2To moving coordinate system x2o2y2Middle x2 The corner cut of axis.
Step 2: calculating the biography of the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley initial position of Bath main officer of Tibet Dynamic ratio:
Initial position, the moving coordinate system x of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet1o1y1Middle x1Axis is to quiet coordinate system xo1The corner of x-axis in yThe moving coordinate system x of the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet2o2y2Middle x2Axis is to sitting quietly Mark system xo1The corner of x-axis in yAccording to cutting, polar coordinates are theoretical to be obtained:
In formula, p112) and p221) it is respectively that the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet and Bath main officer of Tibet are non-circular driven Synchronous pulley pitch curve common tangent incision superius C1、C2Cut diameter value, p113) and p331) it is respectively the non-circular active synchronization of Bath main officer of Tibet Belt wheel pitch curve and non-circular tensioning synchronous pulley pitch curve common tangent incision superius C6、C5Cut diameter value, p223) and p332) respectively For the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet and non-circular tensioning synchronous pulley pitch curve common tangent incision superius C3、C4Cut diameter Value, θ120Diameter p is cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet112) and the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Cut diameter p221) arrive respective moving coordinate system trunnion axis corner initial value, θ130It is cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet Diameter p113) with non-circular tensioning synchronous pulley pitch curve cut diameter p331) arrive respective moving coordinate system trunnion axis corner initial value, θ230 Diameter p is cut for the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet223) with non-circular tensioning synchronous pulley pitch curve cut diameter p332) arrive The corner initial value of respective moving coordinate system trunnion axis, θ12、θ13The respectively non-circular active synchronization belt wheel pitch curve incision superius C of Bath main officer of Tibet1、 C6Correspondence cuts diameter to moving coordinate system x1o1y1Middle x1The corner cut of axis, θ21、θ23The respectively non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Incision superius C2、C3Correspondence cuts diameter to moving coordinate system x2o2y2Middle x2The corner cut of axis, θ31、θ32Respectively non-circular tensioning synchronous pulley section Curve incision superius C4、C5Correspondence cuts diameter to moving coordinate system x3o3y3Middle x3The corner cut of axis, L1For the non-circular active synchronization belt wheel of Bath main officer of Tibet With the non-circular driven synchronous pulley center of Bath main officer of Tibet away from L2For in the non-circular driven synchronous pulley of Bath main officer of Tibet and non-circular tensioning synchronous pulley The heart is away from L3For the non-circular active synchronization belt wheel of Bath main officer of Tibet and non-circular tensioning synchronous pulley center away from;
The non-circular active synchronization belt wheel of initial position Bath main officer of Tibet and the non-circular driven synchronous pulley instantaneous transmission ratio of Bath main officer of Tibet are as follows:
Step 3: it is same to calculate the non-circular active synchronization belt wheel of Bath main officer of Tibet, the non-circular driven synchronous pulley of Bath main officer of Tibet and non-circular tensioning Walk the common tangent segment length between the every two-wheeled of belt wheel.
Initial time sets circle of the non-circular tensioning synchronous pulley pitch curve to give radius, the non-circular active synchronization of Bath main officer of Tibet Common tangent segment length T between belt wheel and non-circular driven two point of contact of synchronous pulley of Bath main officer of Tibet0, the non-circular driven synchronous pulley of Bath main officer of Tibet With the common tangent segment length T between non-circular tensioning two point of contact of synchronous pulley1, the non-circular active synchronization belt wheel of Bath main officer of Tibet and non-circular tensioning Common tangent segment length T between two point of contact of synchronous pulley2It is respectively as follows:
In formula, p '1120)、p’1130) it is respectively p1120)、p1130) first differential, p'2120)、p'2230) Respectively p2120)、p2230) first differential, p'3130)、p'3230) it is respectively p3130)、p3230) single order it is micro- Point.
When the non-circular active synchronization belt wheel of Bath main officer of Tibet turns over angleThe non-circular driven synchronous pulley of Bath main officer of Tibet accordingly turns over angleThe non-circular active synchronization belt wheel pitch curve incision superius C of Bath main officer of Tibet1、C6Corresponding arc length variable quantity is s1、s6, Bath main officer of Tibet it is non-circular from Dynamic synchronous pulley pitch curve incision superius C2、C3Corresponding arc length variable quantity is s2、s3, cut on non-circular tensioning synchronous pulley pitch curve Point C4、C5Corresponding arc length variable quantity is s4、s5.Then have:
In formula, p1"(θ1) it is p11) second-order differential, p2"(θ2) it is p22) second-order differential, p3"(θ3) it is p33) Second-order differential, θ3For non-circular tensioning synchronous belt round cut diameter p3To moving coordinate system x3o3y3Middle x3The corner cut of axis.
Any time, the public affairs between the non-circular active synchronization belt wheel of Bath main officer of Tibet and non-circular driven two point of contact of synchronous pulley of Bath main officer of Tibet Tangent line segment length T12, the non-circular driven synchronous pulley of Bath main officer of Tibet and it is non-circular tensioning two point of contact of synchronous pulley between common tangent segment length T23With the common tangent segment length T between the non-circular active synchronization belt wheel of Bath main officer of Tibet, non-circular tensioning two point of contact of synchronous pulley13It is respectively as follows:
In formula, p '112)、p’113) it is respectively p112)、p113) first differential, p'221)、p'223) respectively For p221)、p223) first differential, p'332)、p'331) it is respectively p332)、p331) first differential,It is non- Circle tensioning synchronous pulley pitch curve moving coordinate system x3o3y3Middle x3Axis is to quiet coordinate system xo1The corner of x-axis in y.
Step 4: calculating the biography of the non-circular active synchronization belt wheel of any time Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet Dynamic ratio;
The non-circular active synchronization belt wheel uniform rotation of Bath main officer of Tibet, according to formula (2), (5) solve p1, p2, then instantaneous transmission ratio are as follows:
Step 5: calculating any time synchronous belt perimeter;
The non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet is denoted as with non-circular tensioning synchronous pulley pitch curve common tangent incision superius C6, any time C1With C6Between arc length be c11, the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet and non-circular tensioning synchronous pulley section Curve tangent incision superius is denoted as C3, any time C2With C3Between arc length be c22, non-circular tensioning synchronous pulley pitch curve and Bath The non-circular driven synchronous pulley pitch curve common tangent incision superius of main officer of Tibet is denoted as C4, non-circular tensioning synchronous pulley pitch curve and Bath main officer of Tibet are non-circular Active synchronization belt wheel pitch curve common tangent incision superius is denoted as C5, any time C4With C5Between arc length be c33
Any time, synchronous belt perimeter are as follows:
C=T12+T13+T23+c11+c22+c33 (16)
Step 6: the non-circular free pitch curve of tensioning synchronous pulley calculates;
Iterative algorithm is as follows:
(a) non-circular tensioning synchronous pulley center of rotation is set, the radius of non-circular tensioning synchronous pulley is set as variable, non-circular It is given to be tensioned synchronous pulley radius initial value, is denoted as r3-0, belt length initial value, which is calculated, according to formula (16) is denoted as C0
(b) the non-circular active synchronization belt wheel of Bath main officer of Tibet turns over 1 °, is required to calculate the non-circular driven synchronization of Bath main officer of Tibet according to transmission ratio Belt wheel turns over corresponding angle, and the corner of non-circular tensioning synchronous pulley is identical as the non-circular active synchronization belt wheel of Bath main officer of Tibet.Guaranteeing C Under the premise of constant, corresponding non-circular tensioning synchronous belt when turning over 1 ° according to the non-circular active synchronization belt wheel of formula (16) reverse Bath main officer of Tibet Take turns radius r3-1, that is, correspond to the p at moment3
(c) repeat (b) 358 times, obtain the non-circular active synchronization belt wheel of Bath main officer of Tibet turn over it is corresponding non-at 2 °, 3 ° ..., 359 ° Circle tensioning synchronous pulley radius is respectively r3-2, r3-3... ..., r3-359
(d) 360 concentric circles are so far obtained, by the non-circular tensioning synchronous pulley radius in (a), (b) and (c), every 1 ° A round radius is taken, 360 radiuses are sequentially taken, to set non-circular tensioning synchronous pulley center of rotation as the center of circle, 360 will be taken The outer end point of a radius is sequentially connected with, and composition one is closed non-circular.
(e) by obtained in (d) it is non-circular tensioning synchronous pulley each moment to diameter scale up or reduce so that newly The perimeter and the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet of obtained non-circular tensioning synchronous pulley Perimeter be equal.
(f) radius value at (e) obtained each moment is substituted into the belt length that formula (16) calculate each moment.
If (g) absolute value of the difference of the belt length at each moment and initial belt length is respectively less than preset value, step (k) is carried out, Otherwise step (h) is carried out.
(h) 5 ° before and after belt length maximum position corresponds to moment point, reduce non-circular tensioning synchronous pulley respectively to the 1 of diameter value ~5%, 5 ° before and after belt length minimum position corresponds to moment point, increase it is non-circular tensioning synchronous pulley respectively to diameter value 1~ 5%, it is then fitted to obtain new non-circular tensioning synchronous pulley with B-spline.
(i) non-circular tensioning synchronous pulley each moment after (h) is scaled up or is reduced to diameter, so that newly obtaining Non-circular tensioning synchronous pulley perimeter and the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet week Length is equal.
(j) it the non-circular tensioning synchronous pulley after (i) is substituted into formula (16) to diameter is calculated each moment and correspond to synchronous belt Belt length is walked if each moment corresponds to synchronous belt belt length and the absolute value of the difference of synchronous belt perimeter initial value is respectively less than preset value Suddenly (k), otherwise (h) is returned to.
(k) establish each moment of non-circular tensioning synchronous pulley to diameter and corresponding cornerRelationship is that non-circular tensioning synchronizes Belt wheel pitch curve equation.
The invention has the benefit that
1, the present invention be the self-compensating Bath main officer of Tibet of the amount of becoming slack it is non-circular-non-circular-non-circular three-wheel toothed belt transmission of Bath main officer of Tibet Provide a whole set of perfect design theory basis in practical applications, can be applied to all Bath main officer of Tibets it is non-circular-Bath main officer of Tibet is non- Circle-non-circular three-wheel synchronous belt drive mechanism, promote Bath main officer of Tibet it is non-circular-non-circular-non-circular three-wheel toothed belt transmission of Bath main officer of Tibet It promotes the use of.
2, driving wheel and driven wheel pitch curve are Bath main officer of Tibet curve in the present invention, the generation circular diameter of Bath main officer of Tibet curve, Length, denaturation coefficient and order are controlled variable, by the shape of four non-circular pitch curves of parameter regulation Bath main officer of Tibet, so as to obtain To the transmission ratio of wider range, meets more specific non-at the uniform velocity transmissions and require.
3, the non-circular tensioning synchronous pulley in the present invention is the non-circular synchronous pulley of free pitch curve, can be with real-time compensation bar The synchronous belt sag variable quantity of the non-circular active synchronization belt wheel of this main officer of Tibet and generation during the non-circular driven synchronous belt pulley transmission of Bath main officer of Tibet, Realize non-at the uniform velocity directly accurate transmission of the big center away between.
4, the present invention is easily programmed realization using the exact value for cutting polar coordinates theoretical calculation transmission ratio, and solving precision is high, side Just quick.
Detailed description of the invention
Fig. 1 is transmission principle figure of the invention;
Fig. 2 is the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous belt pulley transmission of Bath main officer of Tibet in the embodiment of the present invention Than with the non-circular active synchronization belt wheel angle relation curve graph of Bath main officer of Tibet;
Synchronous belt belt length change curve when Fig. 3 is the pitch curve using the non-circular tensioning synchronous pulley in the embodiment of the present invention Figure;
Fig. 4 is the pitch curve figure of the non-circular active synchronization belt wheel of Bath main officer of Tibet in the embodiment of the present invention;
Fig. 5 is the pitch curve figure of the non-circular driven synchronous pulley of Bath main officer of Tibet in the embodiment of the present invention;
Fig. 6 is the pitch curve figure of non-circular tensioning synchronous pulley in the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing and case study on implementation the invention will be further described.
Bath main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet, the specific steps are as follows:
Step 1: such as Fig. 1, center in three wheels between every two wheel is given away from being 100mm, the non-circular active of Bath main officer of Tibet Synchronous pulley pitch curve parameter are as follows: circular diameter b occurs1=10mm, length l1=40mm, order n11=1, it is denaturalized Coefficient m11=1, m12=1, three wheels are closing convex curve, calculate the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet according to the above parameter, such as scheme 4。
?By numerical solution in section, r is obtained11、r12Numerical solution.
u1For the angle of tangent line and polar diameter on the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet;
CornerCorner cut θ1, angle u1Between exist
So that it is determined that the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet cuts polar equation are as follows:
Step 2: circular diameter b occurs for the given non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet2=5mm is closed according to transmission The order of system, the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet and the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet is equal, is 1, it is equal with the non-circular driven synchronous pulley pitch curve perimeter of Bath main officer of Tibet according to the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet, it acquires The non-circular driven synchronous pulley pitch curve length l of Bath main officer of Tibet2=40mm is denaturalized Coefficient m21=1, m22=1, it is calculated according to the above parameter The polar diameter of the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet.
?By numerical solution in section, r is obtained21、r22Numerical solution.
u2For the angle of tangent line and polar diameter on the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet;
CornerCorner cut θ2, angle u2Between there are following relationships:
Determine the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet cuts polar equation are as follows:
Pitch curve such as Fig. 5 of the non-circular driven synchronous pulley of Bath main officer of Tibet.
Step 3: calculating the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet and the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet The transmission ratio of initial position:
Initial position, the moving coordinate system x of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet1o1y1Middle x1Axis is to quiet coordinate system xo1The corner of x-axis in yThe moving coordinate system x of the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet2o2y2Middle x2Axis is to sitting quietly Mark system xo1The corner of x-axis in yThe non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley center of Bath main officer of Tibet Square L1=100mm, then have:
In formula, p112) and p221) it is respectively that the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet and Bath main officer of Tibet are non-circular driven Synchronous pulley pitch curve common tangent incision superius C1、C2Cut diameter value, p113) and p331) it is respectively the non-circular active synchronization of Bath main officer of Tibet Belt wheel pitch curve and non-circular tensioning synchronous pulley pitch curve common tangent incision superius C6、C5Cut diameter value, p223) and p332) respectively For the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet and non-circular tensioning synchronous pulley pitch curve common tangent incision superius C3、C4Cut diameter Value, θ120Diameter p is cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet112) and the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Cut diameter p221) arrive respective moving coordinate system trunnion axis corner initial value, θ130It is cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet Diameter p113) with non-circular tensioning synchronous pulley pitch curve cut diameter p331) arrive respective moving coordinate system trunnion axis corner initial value, θ230 Diameter p is cut for the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet223) with non-circular tensioning synchronous pulley pitch curve cut diameter p332) arrive The corner initial value of respective moving coordinate system trunnion axis, θ12、θ13The respectively non-circular active synchronization belt wheel pitch curve incision superius C of Bath main officer of Tibet1、 C6Correspondence cuts diameter to moving coordinate system x1o1y1Middle x1The corner cut of axis, θ21、θ23The respectively non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Incision superius C2、C3Correspondence cuts diameter to moving coordinate system x2o2y2Middle x2The corner cut of axis, θ31、θ32Respectively non-circular tensioning synchronous pulley section Curve incision superius C4、C5Correspondence cuts diameter to moving coordinate system x3o3y3Middle x3The corner cut of axis, L1For the non-circular active synchronization belt wheel of Bath main officer of Tibet With the non-circular driven synchronous pulley center of Bath main officer of Tibet away from L2For in the non-circular driven synchronous pulley of Bath main officer of Tibet and non-circular tensioning synchronous pulley The heart is away from L3For the non-circular active synchronization belt wheel of Bath main officer of Tibet and non-circular tensioning synchronous pulley center away from;
It is i according to the instantaneous transmission ratio that formula (10) calculate initial position120=1.1121;
Step 4: it is same to calculate the non-circular active synchronization belt wheel of Bath main officer of Tibet, the non-circular driven synchronous pulley of Bath main officer of Tibet and non-circular tensioning Walk the common tangent segment length between the every two-wheeled of belt wheel.
Initial position sets circle of the non-circular tensioning synchronous pulley pitch curve to give radius, the non-circular active synchronization of Bath main officer of Tibet Common tangent segment length T between belt wheel and non-circular driven two point of contact of synchronous pulley of Bath main officer of Tibet0, the non-circular driven synchronous pulley of Bath main officer of Tibet With the common tangent segment length T between non-circular tensioning two point of contact of synchronous pulley1, the non-circular active synchronization belt wheel of Bath main officer of Tibet and non-circular tensioning Common tangent segment length T between two point of contact of synchronous pulley2It is respectively as follows:
T is calculated to obtain according to formula (11)0=106.3370mm, T1=109.6547mm, T2=105.2783mm.
When the non-circular active synchronization belt wheel of Bath main officer of Tibet turns over angleThe non-circular driven synchronous pulley of Bath main officer of Tibet accordingly turns over angleThe non-circular active synchronization belt wheel pitch curve incision superius C of Bath main officer of Tibet1、C6Corresponding arc length variable quantity is s1、s6, Bath main officer of Tibet it is non-circular from Dynamic synchronous pulley pitch curve incision superius C2、C3Corresponding arc length variable quantity is s2、s3, cut on non-circular tensioning synchronous pulley pitch curve Point C4、C5Corresponding arc length variable quantity is s4、s5.Then have:
In formula, p1"(θ1) it is p11) second-order differential, p2"(θ2) it is p22) second-order differential, p3"(θ3) it is p33) Second-order differential, θ3For non-circular tensioning synchronous belt round cut diameter p3To moving coordinate system x3o3y3Middle x3The corner of axis.
Set circle of the non-circular tensioning synchronous pulley to give radius, the non-circular active synchronization belt wheel uniform rotation of Bath main officer of Tibet;Appoint The common tangent segment length anticipated between the non-circular active synchronization belt wheel of moment Bath main officer of Tibet and non-circular driven two point of contact of synchronous pulley of Bath main officer of Tibet T12, the non-circular driven synchronous pulley of Bath main officer of Tibet and it is non-circular tensioning two point of contact of synchronous pulley between common tangent segment length T23, Bath main officer of Tibet Common tangent segment length T between non-circular active synchronization belt wheel and non-circular tensioning two point of contact of synchronous pulley13It is respectively as follows:
In formula, p '112)、p’113) it is respectively p112)、p113) first differential, p'221)、p'223) respectively For p221)、p223) first differential, p'332)、p'331) it is respectively p332)、p331) first differential,It is non- Circle tensioning synchronous pulley pitch curve moving coordinate system x3o3y3Middle x3Axis is to quiet coordinate system xo1The corner of x-axis in y.
Step 5: calculating the biography of the non-circular active synchronization belt wheel of any time Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet Dynamic ratio;
The non-circular active synchronization belt wheel uniform rotation of Bath main officer of Tibet, and then according to formula (4), (8) solve p1, p2, then Bath is calculated to obtain The non-circular active synchronization belt wheel of main officer of Tibet and the non-circular driven synchronous pulley instantaneous transmission ratio of Bath main officer of Tibet:
According to formula (14), (15), (16), when calculating circle driving wheel rotates a circle, the non-circular active synchronization belt wheel of Bath main officer of Tibet turns Angle and the non-circular driven synchronous belt pulley transmission of Bath main officer of Tibet are more as shown in Figure 2 than curve.
Step 6: calculating synchronous belt perimeter;
The non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet is denoted as with non-circular tensioning synchronous pulley pitch curve common tangent incision superius C6, any time C1With C6Between arc length be c11, the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet and non-circular tensioning synchronous pulley section Curve point of contact is denoted as C3, any time C2With C3Between arc length be c22, non-circular tensioning synchronous pulley pitch curve and Bath main officer of Tibet it is non-circular from Dynamic synchronous pulley pitch curve common tangent incision superius is denoted as C4, non-circular tensioning synchronous pulley pitch curve and the non-circular active synchronization of Bath main officer of Tibet Belt wheel pitch curve common tangent incision superius is denoted as C5, any time C4With C5Between arc length be c33
Any time, synchronous belt perimeter are as follows:
C=T12+T13+T23+c11+c22+c33 (18)
It carves at the beginning, is C according to the original perimeter that formula (18) calculate synchronous belt0=656.67mm;
Each timing synchronization band belt length, each timing synchronization when driving wheel rotates one week are sequentially calculated according to above method Band belt length change curve such as Fig. 3.
Step 7: the non-circular free pitch curve of tensioning synchronous pulley calculates.
Iterative algorithm is as follows:
(a) non-circular tensioning synchronous pulley center of rotation is set, the radius of non-circular tensioning synchronous pulley is set as variable r3, non- Circle tensioning synchronous pulley radius initial value is denoted as r3-0=30mm, synchronous belt original perimeter are denoted as C0=656.67mm.
(b) the non-circular active synchronization belt wheel of Bath main officer of Tibet turns overAccording to the non-circular active synchronization belt wheel of Bath main officer of Tibet and Bath main officer of Tibet Non-circular driven synchronous belt pulley transmission calculates the non-circular driven synchronous pulley of Bath main officer of Tibet and turns over corresponding angle than relationshipThe corner of non-circular tensioning synchronous pulley is identical as the non-circular active synchronization belt wheel of Bath main officer of TibetUnder the premise of guaranteeing that synchronous belt perimeter is constant, r is calculated3-1=30.1562mm.
(c) it repeats (b) 358 times, obtains r3-2, r3-3... ..., r3-359
(d) 360 concentric circles are so far obtained, by the non-circular tensioning synchronous pulley radius in (a), (b) and (c), every 1 ° A round radius is taken, 360 radiuses are sequentially taken, to set non-circular tensioning synchronous pulley center of rotation as the center of circle, 360 will be taken The outer end point of a radius is sequentially connected with, and composition one is closed non-circular.
(e) scaling up each point of non-circular tensioning synchronous pulley obtained in (d) or reduce to diameter, so that new The perimeter of the non-circular tensioning synchronous pulley arrived and the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet Perimeter is equal.
(f) radius value at (e) obtained each moment is substituted into the belt length that formula (18) calculate each moment.
If (g) absolute value of the difference of the belt length at each moment and initial belt length is respectively less than preset value, step (k) is carried out, Otherwise step (h) is carried out.
(h) 5 ° before and after belt length maximum position corresponds to moment point, reduce non-circular tensioning synchronous pulley respectively to diameter value 3%, 5 ° before and after belt length minimum position corresponds to moment point, increase non-circular tensioning synchronous pulley respectively to the 3% of diameter value, then It is fitted to obtain new non-circular tensioning synchronous pulley with B-spline.
(i) non-circular tensioning synchronous pulley each point after (h) is scaled up or is reduced to diameter, so that newly obtain The perimeter of non-circular tensioning synchronous pulley and the perimeter of the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet It is equal.
(j) each point is calculated to diameter substitution formula (18) in the non-circular tensioning synchronous pulley after (i) and corresponds to synchronous belt band It is long, if each point corresponds to synchronous belt belt length and the absolute value of the difference of synchronous belt perimeter initial value is respectively less than preset value, carry out step (k), otherwise (h) is returned to.
(k) three pitch curves taken turns and phase angle, center of rotation all determine, establish each moment of non-circular tensioning synchronous pulley With corresponding angle relation be non-circular tensioning synchronous pulley pitch curve equation to diameter.Non-circular tensioning synchronous pulley after calculating is certainly By pitch curve such as Fig. 6.
Synchronous belt theory belt length variable quantity is 12.06mm in the embodiment, is the 1.8% of synchronous belt total length, because of band It needs to be tensioned, can satisfy actual operation requirements.

Claims (1)

1. Bath main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet, it is characterised in that: this method tool Body is as follows:
Step 1: determining that the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley section of Bath main officer of Tibet are bent according to transmission rule Line equation;
The non-circular active synchronization belt wheel of Bath main officer of Tibet is the input link of uniform rotation, cuts polar equation:
In formula, n11For the order of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet, l1For the non-circular active synchronization belt wheel section of Bath main officer of Tibet The length of curve, r11、r12The respectively pole of Bath main officer of Tibet non-circular active synchronization belt wheel pitch curve first segment curve and second segment curve Diameter, b1For the generation circular diameter of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet,For the non-circular active synchronization belt wheel section of Bath main officer of Tibet Curve moving coordinate system x1o1y1Middle x1Axis is to quiet coordinate system xo1The corner of x-axis in y, moving coordinate system x1o1y1Origin be arranged in Bath At the center of rotation of the non-circular active synchronization belt wheel of main officer of Tibet, m11、m12Respectively first on the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet The denaturation coefficient of section curve and second segment curve;
In formula, p1Diameter, θ are cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet1For p1To moving coordinate system x1o1y1Middle x1Axis is cut Angle, and
The non-circular driven synchronous pulley of Bath main officer of Tibet is output link, and pitch curve cuts polar equation:
In formula, n21For the non-circular driven synchronous pulley pitch curve order of Bath main officer of Tibet, l2It is bent for the non-circular driven synchronous pulley section of Bath main officer of Tibet The length of line, r21, r22The pole of first segment curve and second segment curve respectively on the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Diameter, b2For the generation circular diameter of the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet,For the non-circular driven synchronous pulley section of Bath main officer of Tibet Curve moving coordinate system x2o2y2Middle x2Axis is to quiet coordinate system xo1The corner of x-axis in y, moving coordinate system x2o2y2Origin be arranged in Bath At the center of rotation of the non-circular driven synchronous pulley of main officer of Tibet, quiet coordinate system xo1The origin of y is arranged in the non-circular active synchronization belt wheel of Bath main officer of Tibet Center of rotation at, m21、m22First segment curve and second segment curve respectively on the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Denaturation coefficient;
In formula, p2Diameter, θ are cut for the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet2For p2To moving coordinate system x2o2y2Middle x2Axis is cut Angle;
Step 2: calculating the transmission of the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley initial position of Bath main officer of Tibet Than:
Initial position, the moving coordinate system x of the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet1o1y1Middle x1Axis is to quiet coordinate system xo1In y The corner of x-axisThe moving coordinate system x of the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet2o2y2Middle x2Axis is to quiet coordinate system xo1The corner of x-axis in yAccording to cutting, polar coordinates are theoretical to be obtained:
In formula, p112) and p221) it is respectively that the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet is non-circular driven synchronous with Bath main officer of Tibet Belt wheel pitch curve common tangent incision superius C1、C2Cut diameter value, p113) and p331) it is respectively the non-circular active synchronization belt wheel of Bath main officer of Tibet Pitch curve and non-circular tensioning synchronous pulley pitch curve common tangent incision superius C6、C5Cut diameter value, p223) and p332) it is respectively bar The non-circular driven synchronous pulley pitch curve of this main officer of Tibet and non-circular tensioning synchronous pulley pitch curve common tangent incision superius C3、C4Cut diameter value, θ120Diameter p is cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet112) with the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet cut diameter p221) arrive respective moving coordinate system trunnion axis corner initial value, θ130Diameter p is cut for the non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet113) with non-circular tensioning synchronous pulley pitch curve cut diameter p331) arrive respective moving coordinate system trunnion axis corner initial value, θ230For bar The non-circular driven synchronous pulley pitch curve of this main officer of Tibet cuts diameter p223) with non-circular tensioning synchronous pulley pitch curve cut diameter p332) to respectively The corner initial value of moving coordinate system trunnion axis, θ12、θ13The respectively non-circular active synchronization belt wheel pitch curve incision superius C of Bath main officer of Tibet1、C6It is right Diameter should be cut to moving coordinate system x1o1y1Middle x1The corner cut of axis, θ21、θ23Respectively cut on the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet Point C2、C3Correspondence cuts diameter to moving coordinate system x2o2y2Middle x2The corner cut of axis, θ31、θ32Respectively non-circular tensioning synchronous pulley pitch curve Incision superius C4、C5Correspondence cuts diameter to moving coordinate system x3o3y3Middle x3The corner cut of axis, moving coordinate system x3o3y3Origin be arranged at non-circular At the center of rotation of tight synchronous pulley, L1For the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley center of Bath main officer of Tibet Away from L2It is the non-circular driven synchronous pulley of Bath main officer of Tibet and non-circular tensioning synchronous pulley center away from L3For the non-circular active synchronization band of Bath main officer of Tibet Wheel with non-circular tensioning synchronous pulley center away from;
The non-circular active synchronization belt wheel of initial position Bath main officer of Tibet and the non-circular driven synchronous pulley instantaneous transmission ratio of Bath main officer of Tibet are as follows:
Step 3: calculating the non-circular active synchronization belt wheel of Bath main officer of Tibet, the non-circular driven synchronous pulley of Bath main officer of Tibet and non-circular tensioning synchronous belt Take turns the common tangent segment length between every two-wheeled;
Initial time sets circle of the non-circular tensioning synchronous pulley pitch curve to give radius, the non-circular active synchronization belt wheel of Bath main officer of Tibet With the common tangent segment length T between non-circular driven two point of contact of synchronous pulley of Bath main officer of Tibet0, the non-circular driven synchronous pulley of Bath main officer of Tibet with it is non- Common tangent segment length T between circle tensioning two point of contact of synchronous pulley1, the non-circular active synchronization belt wheel of Bath main officer of Tibet it is synchronous with non-circular tensioning Common tangent segment length T between two point of contact of belt wheel2It is respectively as follows:
In formula, p '1120)、p′1130) it is respectively p1120)、p1130) first differential, p'2120)、p'2230) respectively For p2120)、p2230) first differential, p'3130)、p'3230) it is respectively p3130)、p3230) first differential;
When the non-circular active synchronization belt wheel of Bath main officer of Tibet turns over angleThe non-circular driven synchronous pulley of Bath main officer of Tibet accordingly turns over angle The non-circular active synchronization belt wheel pitch curve incision superius C of Bath main officer of Tibet1、C6Corresponding arc length variable quantity is s1、s6, Bath main officer of Tibet is non-circular driven Synchronous pulley pitch curve incision superius C2、C3Corresponding arc length variable quantity is s2、s3, non-circular tensioning synchronous pulley pitch curve incision superius C4、C5Corresponding arc length variable quantity is s4、s5;Then have:
In formula, p "11) it is p11) second-order differential, p "22) it is p22) second-order differential, p "33) it is p33) two Rank differential, θ3For non-circular tensioning synchronous belt round cut diameter p3To moving coordinate system x3o3y3Middle x3The corner of axis;
Common tangent between the non-circular active synchronization belt wheel of any time Bath main officer of Tibet and non-circular driven two point of contact of synchronous pulley of Bath main officer of Tibet Segment length T12, the non-circular driven synchronous pulley of Bath main officer of Tibet and it is non-circular tensioning two point of contact of synchronous pulley between common tangent segment length T23、 Common tangent segment length T between the non-circular active synchronization belt wheel of Bath main officer of Tibet and non-circular tensioning two point of contact of synchronous pulley13It is respectively as follows:
In formula, p '112)、p′113) it is respectively p112)、p113) first differential, p'221)、p'223) it is respectively p221)、p223) first differential, p'332)、p'331) it is respectively p332)、p331) first differential,It is non-circular It is tensioned synchronous pulley pitch curve moving coordinate system x3o3y3Middle x3Axis is to quiet coordinate system xo1The corner of x-axis in y;
Step 4: calculating the transmission of the non-circular active synchronization belt wheel of any time Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet Than;
The non-circular active synchronization belt wheel uniform rotation of Bath main officer of Tibet, according to formula (2), (5) solve p1, p2, then instantaneous transmission ratio are as follows:
Step 5: calculating any time synchronous belt perimeter;
The non-circular active synchronization belt wheel pitch curve of Bath main officer of Tibet and non-circular tensioning synchronous pulley pitch curve common tangent incision superius are denoted as C6, appoint Anticipate moment C1With C6Between arc length be c11, the non-circular driven synchronous pulley pitch curve of Bath main officer of Tibet and non-circular tensioning synchronous pulley pitch curve Common tangent incision superius is denoted as C3, any time C2With C3Between arc length be c22, non-circular tensioning synchronous pulley pitch curve and Bath main officer of Tibet are non- The driven synchronous pulley pitch curve common tangent incision superius of circle is denoted as C4, non-circular tensioning synchronous pulley pitch curve and the non-circular active of Bath main officer of Tibet Synchronous pulley pitch curve common tangent incision superius is denoted as C5, any time C4With C5Between arc length be c33
Any time, synchronous belt perimeter are as follows:
C=T12+T13+T23+c11+c22+c33 (16)
Step 6: the non-circular free pitch curve of tensioning synchronous pulley calculates;
Iterative algorithm is as follows:
(a) non-circular tensioning synchronous pulley center of rotation is set, the radius of non-circular tensioning synchronous pulley is set as variable, non-circular tensioning Synchronous pulley radius initial value is given, is denoted as r3-0, belt length initial value, which is calculated, according to formula (16) is denoted as C0
(b) the non-circular active synchronization belt wheel of Bath main officer of Tibet turns over 1 °, is required to calculate the non-circular driven synchronous pulley of Bath main officer of Tibet according to transmission ratio Corresponding angle is turned over, the corner of non-circular tensioning synchronous pulley is identical as the non-circular active synchronization belt wheel of Bath main officer of Tibet;Guaranteeing that C is constant Under the premise of, corresponding non-circular tensioning synchronous pulley half when turning over 1 ° according to the non-circular active synchronization belt wheel of formula (16) reverse Bath main officer of Tibet Diameter r3-1, that is, correspond to the p at moment3
(c) it repeats (b) 358 times, obtains the non-circular active synchronization belt wheel of Bath main officer of Tibet and turn at 2 °, 3 ° ..., 359 ° corresponding non-circular Tight synchronous pulley radius is respectively r3-2, r3-3... ..., r3-359
(d) 360 concentric circles are so far obtained, by the non-circular tensioning synchronous pulley radius in (a), (b) and (c), take one every 1 ° The radius of a circle sequentially takes 360 radiuses, to set non-circular tensioning synchronous pulley center of rotation as the center of circle, will take 360 half The outer end point of diameter is sequentially connected with, and composition one is closed non-circular;
(e) by obtained in (d) it is non-circular tensioning synchronous pulley each moment to diameter scale up or reduce so that newly obtaining Non-circular tensioning synchronous pulley perimeter and the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet week Length is equal;
(f) radius value at (e) obtained each moment is substituted into the belt length that formula (16) calculate each moment;
If (g) absolute value of the difference of the belt length at each moment and initial belt length is respectively less than preset value, step (k) is carried out, otherwise It carries out step (h);
(h) 5 ° before and after belt length maximum position corresponds to moment point, reduce it is non-circular tensioning synchronous pulley respectively to diameter value 1~ 5%, 5 ° before and after belt length minimum position corresponds to moment point, increase non-circular tensioning synchronous pulley respectively to the 1~5% of diameter value, Then it is fitted to obtain new non-circular tensioning synchronous pulley with B-spline;
(i) non-circular tensioning synchronous pulley each moment after (h) is scaled up or is reduced to diameter, so that is newly obtained is non- The perimeter of circle tensioning synchronous pulley and the perimeter of the non-circular active synchronization belt wheel of Bath main officer of Tibet and the non-circular driven synchronous pulley of Bath main officer of Tibet are equal It is equal;
(j) it the non-circular tensioning synchronous pulley after (i) is substituted into formula (16) to diameter is calculated each moment and correspond to synchronous belt belt length, If each moment corresponds to synchronous belt belt length and the absolute value of the difference of synchronous belt perimeter initial value is respectively less than preset value, carry out step (k), Otherwise (h) is returned to;
(k) establish each moment of non-circular tensioning synchronous pulley to diameter and corresponding cornerRelationship is non-circular tensioning synchronous pulley Pitch curve equation.
CN201710191398.5A 2017-03-28 2017-03-28 Bath main officer of Tibet is non-circular-non-circular-non-circular three-wheel toothed belt transmission design method of Bath main officer of Tibet Expired - Fee Related CN106917851B (en)

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CN1758852A (en) * 2003-04-23 2006-04-12 波利-克利普系统两合公司 Elliptical synchronous belt drive
CN101379320A (en) * 2006-02-01 2009-03-04 谢夫勒两合公司 Chain drive and use of a chain in a chain drive

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