CN104776180A - Spin-free stepless transmission unit - Google Patents

Spin-free stepless transmission unit Download PDF

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Publication number
CN104776180A
CN104776180A CN201510153818.1A CN201510153818A CN104776180A CN 104776180 A CN104776180 A CN 104776180A CN 201510153818 A CN201510153818 A CN 201510153818A CN 104776180 A CN104776180 A CN 104776180A
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China
Prior art keywords
spin
cone dish
free
roller
point
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Granted
Application number
CN201510153818.1A
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Chinese (zh)
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CN104776180B (en
Inventor
李青涛
李华
姚进
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Sichuan University
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Sichuan University
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
    • F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
    • F16H15/04—Gearings providing a continuous range of gear ratios
    • F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
    • F16H15/32—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line
    • F16H15/36—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface
    • F16H15/38—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces
    • F16H2015/383—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B has a curved friction surface formed as a surface of a body of revolution generated by a curve which is neither a circular arc centered on its axis of revolution nor a straight line with concave friction surface, e.g. a hollow toroid surface with two members B having hollow toroid surfaces opposite to each other, the member or members A being adjustably mounted between the surfaces with two or more sets of toroid gearings arranged in parallel

Abstract

The invention discloses a spin-free stepless transmission unit and aims to provide a spin-free stepless transmission unit which can avoid loss of spin efficiency in certain range of gear ratio. The spin-free stepless transmission unit comprises a spin-free input cone disc (5), a spin-free output cone disc (7) and a spin-free idler wheel (6) which are pressed and in contact by means of clamping force; power is transmitted by traction; speed regulation is realized by swinging the idler wheel by a certain angle; generatrices of rotating curved surfaces of the spin-free input cone disc (5) and the spin-free output cone disc (7) are a logarithmic curve. In a speed regulation process, the rotating axes of the spin-free input cone disc (5), the spin-free output cone disc (7) and the spin-free idler wheel (6) of the spin-free stepless transmission unit and a common tangent of contact points are intersected at one point. The spin-free stepless transmission unit is used for replacing stepless transmission units in various annular stepless transmissions.

Description

A kind of without spin stepless change unit
Technical field
The present invention relates to the variable-speed unit in power train, is exactly specifically towed stepless change unit.
Background technique
Towed whole ring surface type stepless speed variator and towed semi-ring surface type stepless speed variator have had part entrucking and have put goods on the market, as China Patent Publication No. CN 101479503B, CN 100460715C, CN 1116536C, CN 102725561B and CN 101156006A disclose such stepless speed variator.The main composition of its variable-speed unit is: input shaft, axial loading device, input cone dish, live roller, output cone dish, output shaft, principle is all at input disc, hauling ability transmission campaign between live roller and output disc contact area and power by traction, such design improves the friction condition between surface of contact, improve bearing capacity, in being applicable to, huge discharge car.
Its deficiency is: these two kinds of anchor ring stepless change unit, under most working state, all can not avoid " spin " loss in efficiency.
" spin " one word be usually used to when describing towing gear, it means traction surface and the idle running phenomenon being pulled surperficial speed and not having to occur when accurately rolling in the mode of mutually mating.This " spin " can cause the adverse consequencess such as propulsive efficiency reduces, oil temperature raises, workpiece surface is softening.In order to illustrate how so not mutual rate of adaptation produces, and see Fig. 1, it specifically understands the phenomenon of this " spin ".
In the semi-ring surface type stepless change unit shown in Fig. 1: anchor ring input cone dish 1 is with anchor ring roller 2 in the transmission of A point cantact, and the rotational angular velocity of anchor ring input cone dish 1 is ω 1, the rotational angular velocity of anchor ring roller 2 is ω 2; Anchor ring exports cone dish 3 with anchor ring roller 2 at B point cantact, and the rotational angular velocity of anchor ring input cone dish 1 is ω 3.The rotational axis intersection point that anchor ring input cone dish 1 and anchor ring export cone dish 3 is that C, C point is anchor ring roller 2, anchor ring inputs cone dish 1 and anchor ring exports the instantaneous of relative movement between cone dish 3, and therefore CA and CB is the instantaneous axis between them.ω is respectively along the relative angle speed on CA and CB direction 21and ω 23.The intersection point that common tangent and the anchor ring of anchor ring input cone dish 1 and anchor ring roller 2 export the common tangent of cone dish 3 and anchor ring roller 2 is that Θ, Θ A and Θ B is anchor ring roller 2, anchor ring inputs cone dish 1 and anchor ring exports relative rolling axis between cone dish 3.The angle of Θ A and CA is α 1, the angle between Θ B and CB is α 2.So be respectively ω at the spin angle velocity of A point and B point 21spwith ω 23spwherein: ω 21sp=| ω 21| sin α 1, ω 23sp=| ω 23| sin α 2.
For this semi-ring surface type stepless change unit, anchor ring roller 2 needs with anchor ring inputs cone dish 1, anchor ring exports cone dish 3 and keeps in touch, and the surface of revolution that anchor ring input cone dish 1 and anchor ring export cone dish 3 is all " anchor ring ", what the anchor ring inlet highway 4a of namely anchor ring input cone dish 1 and anchor ring exported the anchor ring output bus 4b of cone dish 3 is all circular arc line, this just makes anchor ring roller can only around a spot wobble in speed regulation process, also just make the movement locus of Θ point in speed regulation process be circular arc line, that is only have when Θ point and C point intersect at Θ 1point or Θ 2during point, just can avoid this " spin " phenomenon; In addition, for whole ring surface type stepless speed variator, this " spin " phenomenon will exist always.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of stepless change unit all avoiding spin loss in efficiency in certain variator ratio range is provided.
In order to solve the technical problem of above-mentioned existence, the present invention adopts subordinate's technological scheme: comprise input cone dish, export cone dish, roller, mutually compress contact by clamping force, by traction transferring power, roller swings several angle and realizes speed governing; Input cone dish, the bus exporting the surface of revolution of cone dish is a kind of logarithmic curve, meets equation:
Its parametric equation form is:
Wherein the initial point O of system of coordinates XOY is the mid point of whole variable-speed unit, and X-axis and input cone dish, the gyration center exporting cone dish overlap, and plane X OY crosses point of contact, r 0be the intersection point of roller contact point normal and rotational axis to the distance between point of contact, θ is the semi-cone angle of roller, and C and C ＇ is constant, input cone dish, export the surface of revolution of cone dish bus curvilinear equation in the mutual contrary sign of x; In speed regulation process, require that input cone dish is bored rim turning axle with output and moved axially, roller moves radially along turning axle.
According to above-mentioned curvilinear equation, through mathematical proof, can draw the following conclusions: from this logarithmic curve, any point has been the distance of the tangent line of this point and the intersection point of X-axis is certain value r 0tan θ; Employing technique scheme can be drawn by this character, provided by the invention without spin stepless change unit, there is such beneficial effect: namely in speed adjustable range, the common tangent of rotational axis and point of contact that this roller rotational axis without spin stepless change unit, input cone dish export cone dish all meets at a bit, i.e. nothing spin loss in efficiency in speed adjustable range.
Accompanying drawing explanation
Fig. 1 is existing semi-ring surface type stepless change unit transmission principle figure.
Fig. 2 is drive state figure when being 1 without spin stepless change unit velocity ratio.
Fig. 3 is drive state figure when not being 1 without spin stepless change unit velocity ratio.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Without spin stepless change unit due to its special curve form, with regard to the position making the primary component in speed regulation process in variable-speed unit need to adjust self, so must determine that a kind of state is to determine origin position.When gear ratio is 1, each position of components in whole variable-speed unit is relatively special, so for the ease of describing, drive state figure when being 1 without spin stepless change unit velocity ratio is shown in Figure 2.Be pressed in point of contact C point without spin input cone dish 5 with without the roller 6 that spins, export cone dish 7 without spin and be pressed in point of contact D point with without the roller 6 that spins, all form oil film C, D 2 and rotate transferring power by each element.Point P 1for the position at the fixed point place when velocity ratio is 1 without spin roller 6, some P 1the normal of point of contact C, D and the intersection point without roller 6 rotational axis that spins, | CP 1|=| DP 1|=r 0.Semi-cone angle without spin roller 6 is θ.X-axis and the nothing of system of coordinates XOY spin and input cone dish 5, without spinning, the rotational axis exporting cone dish 7 overlaps, and namely true origin O point is export the mid point of cone dish 7 in X-axis without spin input cone dish 5, nothing spin, and XOY plane crosses point of contact C and some D.The tangent line Θ C crossed without spin input cone dish bus 8a upper 1 C exports the tangent line Θ D of upper 1 D of cone dish bus 8b without spinning with crossing, because input cone dish bus 8a is known with the curvilinear equation character exporting cone dish bus 8b without spinning, the intersection point Θ mono-of these two tangent line Θ C and Θ D fixes in X-axis, and | Θ C|=| Θ D|.If the geometrical shape of roller can meet with a parameter that is situated between: | Θ C|=| Θ D|=r 0tan θ, so certain the and X-axis of the rotational axis of roller meets at a Θ.Because velocity ratio is at this moment 1, some Θ so at this moment overlaps with initial point O.Obviously not spin loss in efficiency at a C and the Traction Drive of some D.In addition, the distance without spin input cone dish 5 and initial point O is R1, and exporting cone dish 7 with the distance of initial point O without spin is R2, when velocity ratio is 1, and R1=R2.
In fig. 2, without spinning, roller 6 angle of yaw is γ, this is velocity ratio is not 1, but some Θ is still in X-axis, namely still not spin loss in efficiency at a C and the Traction Drive of some D, but this be without spin roller 6 fixed point position at a P2 place, P2 in Y-axis, | OP1|>|OP2|.Input cone dish 5 without spin and export cone dish 7 without spinning can keep in touch respectively with without the roller 6 that spins to ensure simultaneously, inputting cone dish 5 without spin and export cone dish 7 without spinning needs to move certain distance in the axial direction, now, distance without spin input cone dish 5 and initial point O is R3, exporting cone dish 7 with the distance of initial point O without spin is R4, here determined with without the equation exporting cone dish bus 8b that spins by input cone dish bus 8a: R3>R1, R4>R2 and R3 ≠ R4.
Feature of the present invention is, inputting cone dish 5 without spin and export cone dish 7 without spinning in speed regulation process needs to move along its rotational axis, need to deflect certain angle without spin roller 6, and move along Y-axis, input cone dish bus 8a according to spin can know with the character without the curvilinear equation exporting cone dish bus 8b that spins, input cone dish 5 without spin, export cone dish 7 without spin, meet at 1 Θ without certain and point of contact C, D the common tangent of rotational axis of the roller 6 that spins.Namely this nothing spin variable-speed unit all can realize without spin Traction Drive in certain ratio coverage.

Claims (1)

1., without a spin stepless change unit, comprise input cone dish, export cone dish, roller, by clamping force, input output cone dish is compressed mutually with roller respectively and contact, by traction transferring power, roller swings several angle and realizes speed governing; It is characterized in that: input cone dish, the bus exporting the surface of revolution of cone dish is a kind of logarithmic curve, meets equation:
Its parametric equation form is:
Wherein the initial point O of system of coordinates XOY is the mid point of whole variable-speed unit, and X-axis and input cone dish, the rotational axis exporting cone dish overlap, and plane X OY crosses the point of contact of roller and input output cone dish, r 0be the intersection point of roller contact point normal and its rotational axis to the distance between point of contact, θ is the semi-cone angle of roller, and C and C ＇ is constant, input cone dish, export the surface of revolution of cone dish bus curvilinear equation in the mutual contrary sign of x; In speed regulation process, require that input cone dish is bored rim turning axle with output and moved axially, roller moves radially along turning axle.
CN201510153818.1A 2015-04-02 2015-04-02 One kind is without spin variable speed unit Active CN104776180B (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276110A (en) * 2015-07-29 2016-01-27 四川大学 Self-rotation-free traction type stepless speed changer
CN105881210A (en) * 2016-05-18 2016-08-24 同济大学 Automatic stepless speed change device used for transmission of rotary tool and using method of automatic stepless speed change device
CN106438891A (en) * 2016-10-31 2017-02-22 西华大学 Design method for spinning-free structure of traction type continuously variable transmission
CN106838190A (en) * 2016-12-21 2017-06-13 四川大学 A kind of parallel axes is without the towed buncher that spins
CN106931114A (en) * 2016-12-21 2017-07-07 四川大学 A kind of adaptive rate is without the towed buncher that spins
WO2017174106A1 (en) * 2016-04-04 2017-10-12 Mazaro Nv Planetary variator for variable transmission
CN107289081A (en) * 2016-10-31 2017-10-24 西华大学 It is a kind of to roll cone-shaped stepless speed change units without spin more
CN107339384A (en) * 2016-10-31 2017-11-10 西华大学 One kind is without spin integral curve formula variable speed unit
CN107339385A (en) * 2016-10-31 2017-11-10 西华大学 One kind is without the monocyclic disc type stepless variable-speed unit that spins
CN108240436A (en) * 2018-01-12 2018-07-03 四川大学 A kind of towed CVT is without spin mechanics integrated approach
CN110803218A (en) * 2019-12-09 2020-02-18 西华大学 Single-power flow stepless steering transmission system of tracked vehicle
CN110925372A (en) * 2019-12-09 2020-03-27 西华大学 Full-contact easy-speed-regulation inner cone type stepless speed change unit
CN113883242A (en) * 2020-07-02 2022-01-04 四川大学 Self-adaptive variable speed runner exponential type non-spinning traction type continuously variable transmission

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JP2003232415A (en) * 2002-02-08 2003-08-22 Koyo Seiko Co Ltd Toroidal type continuously variable transmission
CN1568407A (en) * 2001-09-08 2005-01-19 轨道牵引有限公司 An improved continuously variable transmission device
CN1890488A (en) * 2003-11-14 2007-01-03 轨道牵引有限公司 An improved continuously variable transmission device

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Publication number Priority date Publication date Assignee Title
JPS62270856A (en) * 1986-05-19 1987-11-25 Nissan Motor Co Ltd Toroidal type continuously variable transmission
US5916057A (en) * 1997-05-27 1999-06-29 Excelermalic Inc. Zero spin infinitely variable traction roller transmission
JP2000199552A (en) * 1999-01-05 2000-07-18 Nsk Ltd Half toroidal type continuously variable transmission
US20020019288A1 (en) * 2000-08-09 2002-02-14 Nissan Motor Co., Ltd. Toroidal continuously variable transmission
CN1568407A (en) * 2001-09-08 2005-01-19 轨道牵引有限公司 An improved continuously variable transmission device
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CN1890488A (en) * 2003-11-14 2007-01-03 轨道牵引有限公司 An improved continuously variable transmission device

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276110A (en) * 2015-07-29 2016-01-27 四川大学 Self-rotation-free traction type stepless speed changer
CN108884917A (en) * 2016-04-04 2018-11-23 马扎罗股份有限公司 Planetary transmission for variable drive assembly
CN108884917B (en) * 2016-04-04 2021-11-05 马扎罗股份有限公司 Planetary transmission for variable transmission
WO2017174106A1 (en) * 2016-04-04 2017-10-12 Mazaro Nv Planetary variator for variable transmission
US11060591B2 (en) 2016-04-04 2021-07-13 Mazaro Nv Planetary variator for variable transmission
RU2739507C2 (en) * 2016-04-04 2020-12-25 Мазаро Нв Planetary variator for controlled transmission
CN105881210B (en) * 2016-05-18 2019-02-01 同济大学 Automatic stepless speed-changing device and its application method for the transmission of rotary type cutter
CN105881210A (en) * 2016-05-18 2016-08-24 同济大学 Automatic stepless speed change device used for transmission of rotary tool and using method of automatic stepless speed change device
CN106438891B (en) * 2016-10-31 2019-09-10 西华大学 A kind of towed CVT is without spin structure design method
CN107289081A (en) * 2016-10-31 2017-10-24 西华大学 It is a kind of to roll cone-shaped stepless speed change units without spin more
CN107339384A (en) * 2016-10-31 2017-11-10 西华大学 One kind is without spin integral curve formula variable speed unit
CN107339385A (en) * 2016-10-31 2017-11-10 西华大学 One kind is without the monocyclic disc type stepless variable-speed unit that spins
CN107339385B (en) * 2016-10-31 2023-08-15 西华大学 Spin-free single-ring disc type stepless speed change unit
CN106438891A (en) * 2016-10-31 2017-02-22 西华大学 Design method for spinning-free structure of traction type continuously variable transmission
CN106838190A (en) * 2016-12-21 2017-06-13 四川大学 A kind of parallel axes is without the towed buncher that spins
CN106838190B (en) * 2016-12-21 2019-05-17 四川大学 A kind of parallel axes is without the towed stepless transmission that spins
CN106931114A (en) * 2016-12-21 2017-07-07 四川大学 A kind of adaptive rate is without the towed buncher that spins
CN106931114B (en) * 2016-12-21 2019-03-29 四川大学 A kind of adaptive rate is without the towed stepless transmission that spins
CN108240436B (en) * 2018-01-12 2020-10-13 四川大学 Traction type CVT non-spinning mechanism comprehensive method
CN108240436A (en) * 2018-01-12 2018-07-03 四川大学 A kind of towed CVT is without spin mechanics integrated approach
CN110803218A (en) * 2019-12-09 2020-02-18 西华大学 Single-power flow stepless steering transmission system of tracked vehicle
CN110925372A (en) * 2019-12-09 2020-03-27 西华大学 Full-contact easy-speed-regulation inner cone type stepless speed change unit
CN113883242A (en) * 2020-07-02 2022-01-04 四川大学 Self-adaptive variable speed runner exponential type non-spinning traction type continuously variable transmission

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