CN1117123A - Automatic stepless speed variator - Google Patents
Automatic stepless speed variator Download PDFInfo
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- CN1117123A CN1117123A CN 94113783 CN94113783A CN1117123A CN 1117123 A CN1117123 A CN 1117123A CN 94113783 CN94113783 CN 94113783 CN 94113783 A CN94113783 A CN 94113783A CN 1117123 A CN1117123 A CN 1117123A
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Abstract
The present invention is a gear-type automatic stepless speed variator for machines, esp for transport vehicles; and it aims at overcoming the demerits of the available speed variators. The said speed variator mainly consists of central shaft, central gear, planetary idle wheel, planetary gear, damping mechanism, gear holder, one-way clutch mechanism, annulus and casing. It has smooth and flexible speed variation from start to highest speed, and has the same forward and backward speed range.
Description
The present invention relates to a kind of speed changer, especially for a kind of infinitely variable speed device in automobile and other machinery.
The mechanical transmission of dress usefulness on the at present existing automobile according to the difference of maneuverability pattern, has manual operating formula, automatic control type and semiautomatic control formula; According to the velocity ratio variation characteristic, can be divided into level and stepless speed changer are arranged, and stepless speed variator has the branch of mechanical transmission and hydraudynamic drive.
Manual speed changer has an operating technology to require and waste engine power and the sharp problem of manipulation expense.To heavy truck, still can not imagine with human control.To minibus and some minicar, handle and the raising portability in order fundamentally to simplify, the automatic speed changing of employing is also arranged or common speed changer is realized automatic or automanual.
Mechanical continuously-variable transmission has two kinds of the wheeled and belt types of friction, because transmission efficiency is not high and be not suitable for transmitting big moment, only is being used (as " making folder " minicar belt automatic stepless speed variator) on indivedual compact car at present.In addition, the torque converter that on some heavy-duty car and limousine, adopts, can play certain stepless change effect, but because slewing range is narrow, transmission efficiency is low, what reality adopted nearly all is to unite use with mechanical transmission, forms so-called Hydromechanical transmission, causes bulky cost to increase thus.
More than the shortcoming of the various existing stepless speed variators of Jie Shaoing is conspicuous, can not commonly apply.The step type speed changer that now wide model is used, for the power that makes motor obtains more effectively utilizing, can lowest gear and the most high-grade between set up a grade number, differential to reduce.Six grades of synchrom esh transmissions of the Japanese company's T S-53 of Hino (LF068-CB) type that First Automobile Works is introduced are exactly example.(now be applied on liberation 141 cars of recent production product.Liberation 141 automobiles of Sheng Chaning are five speed transmissions at first).Yet this measure is limited, and the shelves number is many more, and body is just big more, and manufacture cost is also high more; The shelves number is many more, and gear shift is frequent more, not only makes to handle difficulty and strengthen, but also easily makes change gear cause irregular wear, tooth length is shortened and tapering occurs, and then speed changer is produced lose rank, what is more can not transmission.Alleviate the brinelling of gear during for gear shift, the step type speed changer generally all is equipped with synchromesh unit, but because gear shift is frequent, makes synchronizer wear and tear very soon, change part maintenance rate height.
The objective of the invention is to overcome the shortcoming of known various speed changers, obtain that a kind of volume is little, simple in structure, transmission efficiency is high, slewing range is wide and submissive, the gear type infinitely variable speed device of the wide model of purposes.
The object of the present invention is achieved like this: it is mainly taken turns by central shaft, central gear, planet idle, planet wheel, resistance mechanism, wheel carrier, one-way clutch mechanism, ring and forms with other driving mechanism and housing, cap and the operating mechanism etc. of the cramp joint of ring wheel.It is characterized in that central shaft and central gear are an one or an assemblying body, the front portion of axle is provided with the structure that adapts to various power input mechanism cramp joints.Have at least one or several planet idle to be meshed with one or several planet wheels, and by separately the axle or bearing fixing on wheel carrier, have at least one or several resistance mechanism also to be installed on the relevant position of wheel carrier simultaneously, make planet idle and planet wheel produce direct or indirect rotational resistance with it, the big I of its rotational resistance value is used for the needs of mechanical classification or model and decides according to the present invention.This resistance mechanism is made up of rotating part and standing part, the parts of rotating part contact with the parts of standing part, be a kind of have certain elastic force value (its elastic force value size can be used for according to the present invention equally machinery type or model and decide) rolling element or the contact of slide mass.Rotating part can be the tooth of gear and parts rolling that is located at its standing part that has certain elastic force value on every side accordingly or slide by touching; Also can on wheel shaft, set out cam or eccentric shaft and eccentric rolling element, and wheel radially or the footpath of wheel shaft two rollers or some rollers and similar rolling element thereof etc. upwards are set slide or roll with standing part parts that have certain value elastic force accordingly around being arranged on it and contact.And the parts of standing part can be the rollers with elastic body, it also can be plunger with elastic body, can also be the slide plate with elastic body, sliding block, or spring sheet, spring thread, and analog etc., roll or sliding contact with the parts that are located at its middle corresponding rotating part.The elastic member of standing part also can be arranged on the wheel body of rotating part or on the wheel shaft, and the parts of rotating part equally also can be arranged on the standing part; And wheel carrier is contained on the corresponding diameter of axle by bearing housing together with thereon planet idle, planet wheel, resistance mechanism of dress, and planet idle is aligned be engaged on the central gear.One-way clutch mechanism is used to control wheel carrier, and wheel carrier can only or not rotated towards the single direction rotation.This mechanism also is made up of rotating part and standing part.Rotating part and wheel carrier are that an integral piece or an assemblying body spare are arranged on the wheel carrier.And standing part is arranged on the position of celebrating mutually of housing, with housing be one, or be assembled on the housing.This one-way clutch mechanism (similar free wheel device) can adopt ratchet-type, roller type or ball type etc.Ring wheel is engaged on the planet wheel by axle or bearing and analog supporting suit thereof, and makes itself and central gear on same axis; The ring wheel is the rotating speed a internal gear or external gear are driven and export stepless automatic transmission by planet wheel after.According to the needs of various structure transmissions and the requirement of various power output, power output on the ring wheel, can design multiple organization plan, as can be on ring wheel direct or indirect pto, bearing aperture, internal gear, external gear, tooth cover, toothholder, the inside and outside spline of being provided with, flange disc and connecting with screw, screw rod etc.To adapt to and the cramp joint of various driving mechanism parts.
Other structure of the present invention: on the central shaft or axle front portion speedup or reduction gear are set, can improve or reduce the input speed of central shaft; On ring wheel or ring wheel rear portion speedup or reduction gear are set, can make output speed be higher or lower than the rotating speed of ring wheel; The rotating part of resistance mechanism can be arranged on the wheel body of planet idle or planet wheel or on the wheel shaft, also can be arranged on other the rotor that is driven by planet idle or planet wheel.Wheel carrier can be designed to the single-wheel frame, also can be designed to the bilateral frame of one or be combined as the bilateral frame; The gearshift mechanism that forward or reverse is set at the rear portion of ring wheel can obtain the rotating speed of positive and negative both direction; Center setting at ring wheel rear portion cogs as the central gear of another stepless automatic transmission, and deducibility thus, the present invention can become some levels, make it to become super CVT (continuously variable transmission).
Advantage of the present invention is: as be used for automobile, can make full use of engine power.The speed of automobile running is directly controlled with throttle by the driver, need not handle, and drives easily, automobile is advanced and retreat to have equal stepless automatic slewing range.Meet and go up a slope or when meeting big running resistance, can increase torque force automatically.Can increase the speed of a motor vehicle automatically when running resistance reduces, and then improve the average speed and the economic performance of automobile, and drive steadily submissive, do not have and impact, help prolonging the working life of automobile, especially to clutch, owing to do not have frequent gear shift, can make the life-span of clutch improve several times; Help installing automatic clutch, make the automobile that automatic clutch is installed more can alleviate driver's manual labor, also can save clutch pedal, realize " double-pedal " manipulation, car steering is handled more simplified, this will shorten the training drivers time greatly and improve running safety.Life-span of the present invention is durable, and suitable with common step type speed changer volume, do not do under any big change situation at the automobile of common step type speed changer, can install the CVT (continuously variable transmission) of design coupling for it, as be used for internal combustion locomotive, the power train of locomotive is greatly simplified.The present invention is a Updated product ideal in the various machineries, particularly Transport Machinery in a word, is with a wide range of applications.
The present invention is illustrated in conjunction with the embodiment and the accompanying drawing thereof that are used for the concrete structure on the automobile.
Fig. 1 is a structural drawing of the present invention.
Fig. 2 is a schematic diagram of the present invention.
As seen from Figure 1, Figure 2, central shaft 22 is an integral piece or an assemblying body spare with central gear 23, the front portion of central shaft 22 is the same with first front portion of existing common step type speed changer, also be provided with the fore bearing diameter of axle, feather key and the rear bearing diameter of axle, so that the power that makes motor imports central shaft 22 into and central shaft 22 is installed on usefulness on the housing 38 by rear bearing by clutch.At the rear portion of the central shaft 22 rear bearing diameters of axle (just entering into the part in the housing), the two end part of central gear 23 are provided with the diameter of axle of the roller bearing 28 of assembling front side frame 14 and rear side 27, and the diameter of axle of the preceding inner bearing 35 of the diameter of axle of ring wheel 5 bearings 29 and pto 36.
Three planet idle 19 are assembled on the wheel shaft 21 by needle bearing 20 separately.Two outsides of wheel shaft 21 respectively are processed with seam, and seam is processed with outward and is assembled to the diameter of axle (it should be interference fit) and the screw thread of using on the wheel carrier 14,27, so that be fastened on the wheel carrier 14,27 with nut 24.
Three planet wheels 12 are integral piece (also caning be combined to integral piece) with axle 16 separately, and planet wheel 12 be a former formula gear, are processed with the corresponding eccentric diameter of axle 17 on the axle 16 that falls in the both sides of wheel, with the usefulness of the roller 18 of the rotatable parts that assemble resistance mechanism.The outside of the eccentric diameter of axle 17 is processed with seam in both sides, and seam is processed with the diameter of axle and the screw thread of assembling planet wheel bearing 15 usefulness outward, so that bearing 15 is fastened on the wheel shaft 16 with nut 6 by the screw thread on the wheel shaft 16.
Six planet wheel shaft pressure caps 7 that specification is identical, the round plain cushion that the similar centre of its gland is with holes respectively is processed with three fastening apertures of using of waiting Huan on it.
Six resistance mechanism 9,10,11,16,17,18 respectively are made of two-part, and wherein the eccentric roller 18 with planet wheel shaft 16 one is a rotating part.Sheet spring 11, sheet spring retainer 10, sheet spring fixing frame 9 are standing part.The roller 18 similar bearings that are assemblied on the eccentric shaft 17 are assembled on the eccentric shaft 17 by roller or other rolling element by crust.Eccentric shaft 17 is an integral piece or an assemblying body spare with planet wheel 12 and wheel shaft 16; Sheet spring retainer 10, a similar end has the short tube of flange plate, is processed with the groove of several installation sheet springs 11 on the pipe, and the degree of depth of groove is greater than the width of sheet spring 11, and the width of groove was as the criterion with the packing into of crook stationary fit that can make the sheet spring.Radially be processed with three equidistant radially protrusion pieces at flange plate.Sheet spring 11 is processed into has certain (about about 45 °-90 ° better) camber shape, is divided into fixed end and elastic force working end, and it is the same with the tubulose cylindrical radian of retainer 10 that its fixed end is processed into.Sheet spring fixing frame 9 also similar ends have the pipe of flange, but pipe is for having an annular table on the interior circle of the other end, be processed with three equidistant through holes that have screw thread on the flange plate, with by screw 8 with its fastening usefulness that is installed on the wheel carrier 14,27, on the interior circle of flange plate, be processed with three equidistant flat grooves, the width of groove was as the criterion with the packing into of three protrusion pieces stationary fit that can make sheet spring retainer 10 flange plate, the degree of depth of groove equals to protrude the thickness of piece, and the length of groove is greater than the length of protruding piece.The pipe of sheet spring fixing frame 9 and the internal diameter of the annular table on the pipe, with can pack the less magnitude of interference of retainer 10 usefulness that sheet spring 11 is installed into, annular table can gland be as the criterion on sheet spring 11 and retainer, in case the sheet spring is deviate from; The standing part 9,10,11 of this resistance mechanism, also can be without sheet spring fixing frame 9, and directly on the fixed end of the tubular wall of sheet spring retainer 10 and sheet spring 11, hole, then sheet spring 11 usefulness screws or rivet directly are fastened on the retainer 10, on the flange plate of retainer 10, process three equidistant silk holes using when installing.Certainly shape and the fixing method about sheet spring 11 also has some kinds, but after 11 installations of sheet spring, its work contact jaw is answered the sense of rotation of oblique eccentric shaft 17, the noiseless so that roller 18 work are submissive.In sum, this resistance mechanism is divided into two-part: roller 18 is the eccentric rotary part.And sheet spring 11, sheet spring retainer 10, sheet spring fixing frame 9 are standing part.Assembling rear roller 18 deflection one sides are compressed its corresponding sheet spring 11, when eccentric shaft 17 rotates, roller 18 is rolled on sheet spring 11 and continue and compress its anterior sheet spring 11, produce the reaction force of certain value simultaneously.This reaction force is reflected on planet Sui wheel 19 and the planet wheel 12, and this is taken turns rotate effort, promptly be rotational resistance.
Ratcheting one- way clutch mechanism 13,14,25,26,37,38 is made up of two-part, a part and cylindrical be processed with hook tooth 13 front side frame 14 one be the ratchet of rotating part.And be installed on the corresponding site of housing 38 by one or several corresponding ratchets 25 and pawl axle 26 and pawl spring 37 corresponding hook tooths 13 in addition, be standing part.When ratchet (front side frame 14) rotates, can only rotate towards single direction.When meeting big resistance, ratchet 25 will in time block ratchet (front side frame 14) under the effect of pawl spring 37, and will not make its backward rotation.One end of pawl axis 26 is provided with the draw-in groove that prevents to assemble the back play.
The front portion of pto 36 is processed with feather key 33 and fore bearing 35 apertures, in order to change gear 34 to be installed and to be connected this usefulness with central shaft 22 by needle bearing 35 assemblings.The rear portion of feather key 33 is processed with the rear bearing diameter of axle, so that pto 36 is assembled to usefulness on the housing 38 by rear bearing.Other structure beyond the rear bearing diameter of axle of pto 36 and the housing is the same substantially with the structure of existing step type speed changer, seldom does narration in order to save length at this.
Change gear 34 is assemblied on the pto 36 by the feather key on it, its front portion also is provided with forward gears tooth cover, its tooth cover is that the interior feather key by change gear 34 directly replaces, and also is provided with the reverse shift fork groove on the fore excircle, and reverse shift fork 32 dress forks are gone in the gear shift groove.The rear portion of groove is the reverse gear change gear.
Reverse gear be reverse gear continuously-meshing gear 4 with reverse gear not continuously-meshing gear 2 be a disjunctor gear, be called reverse gear, the center is processed with the aperture that assembling needle bearing 3 and bearing spacer use (also can and spool be designed to the gear shaft structure of one with its gear) it on.The rear portion of reverse gear axle 1 is processed with the draw-in groove that prevents axle 1 play, reverse gear 2,4 is loaded on the reverse gear axle 1 by the needle bearing 3 and the bearing spacer of its both sides, axle 1 have certain magnitude of interference be assembled to reverse driving gear 30 and change gear 34 under housing 38 on, and reverse gear continuously-meshing gear 4 is aligned be engaged on the reverse driving gear 29.Reverse gear 2,4 mounting points also can be used for its mechanical needs according to the present invention and decide.
The shape of housing 38 should be decided according to the arrangement mode of its drive mechanism, and the housing 38 of present embodiment see from top to bottom should a similar convex shape outside, the housing of other structure and existing step type speed changer is similar substantially, needs according to its drive mechanism and assembling installation, also be processed with the rear bearing aperture of concentric central shaft 22 rear bearing apertures and pto 36 on the two side, housing 38 front and back, the excircle in two apertures equally also all is processed with the silk hole that the installation shaft pressure cap is used.In the middle lower portion of 38 li of housings, just the bottom of the junction of the narrow degree part of the width segments of shell and shell is provided with a breviseptum, and the leading flank of dividing plate is concordant with inboard face about width segments.On the bearing hole bottom of pto 36 of the housing 38 of the narrow part in back and the breviseptum in the middle of the shell, be processed with the coaxial aperture that reverse gear axle 1 usefulness is installed, be processed with in a side of its back aperture the silk hole that reverse gear axle 1 locking plate is used is installed.Forwardly the relevant position near the front and rear wall at least one angle or four angles of the housing 38 of big width segments vertically is processed with the concentric aperture of mounting jaw axle 26 usefulness as required, and is processed with the silk hole that fixed claw axle 26 locking plates are used in a side of back aperture.On the relevant position of housing 38, also be processed with the silk hole of fixed pawl sheet spring 37 and the silk hole of fastening cap thereof.Housing 38 is installed to four apertures using on the flywheel shell of engine, can extension be set in the appropriate location of the front of housing 38 and process on its extension according to the assembling needs.
Cap have with housing 38 on the identical shape in plane, its periphery be processed with housing 38 on the silk hole number on plane equate and the corresponding fastening aperture of using that selector device is mounted thereto.Operating mechanism can be automatic control type or manual control formula, and present embodiment is the manual control formula.The middle part of cap downside vertically on, be provided with two corresponding hangers, its hanger and cap are one or be combined into one by fastening piece can, in the middle of the hanger is a rectangular open-work, be processed with the corresponding aperture that coaxial aperture that shift level and reverse shift fork 32 usefulness are installed and six installation reverse shift fork 32 retaining springs and locking ball are used on two hangers, the outside in this aperture all is processed with the installing and locating spring and adjusts the screw thread that screw is used.The screw thread of reverse gear alarm switch on can processing, the hanger rear portion is installed as required.
Shift level and reverse shift fork 32 are an one or an assemblying body spare.Reverse shift fork 32 can be processed into the circular shape greater than change gear 34 radiuses.Its circular arc two ends respectively are processed with installs the aperture that gear shift shifting block bearing pin is used.The gear shift shifting block is similar to have little cuboid with the corresponding radian of reverse shift fork bottom land, be processed with one in the middle of it and immerse oneself in through hole, and the bearing pin by similar countersink head screw is fastening or be riveted on the aperture, two ends of reverse shift fork 32 with nut, and the gear shift shifting block is rotated freely on its bearing pin.The joint of shift level and reverse shift fork, be provided with a circular plate, respectively be processed with three pittings that the degree of depth is identical with the locking ball radius on it on the relevant position of bi-side, locking ball on assembling back and the hanger and retaining spring cooperate and reverse shift fork 32 and shift level are carried out gear shift locate.Centre at circular plate also is processed with the pivot pin aperture, and lining is housed in the hole, shift level and reverse shift fork is installed on the hanger of cap by pivot pin with this hole.Rear portion at circular plate also is provided with the protrusion piece, touches out the reverse gear alarm switch when being used for reverse gear.
The difference of another structure of the present invention and said structure: the planet idle 19 on the wheel carrier is coaxial with planet wheel 12, is a disjunctor gear, and planet idle 19 diameters are greater than planet wheel 12.Ring wheel is an external gear, equally by with the axle or the bearing suit of the same axis of central shaft and be engaged in the inboard of planet wheel.
Working principle: when automobile started forward, the pilot control shift level made reverse shift fork 32 stir change gear 34 forward by neutral position backward, and its interior feather key is inserted on the forward gears toothholder 31.The power of motor footpath clutch imports the central shaft 22 of CVT (continuously variable transmission) at this moment, pass to planet wheel 12 by the central gear on the axle 23 by planet idle 19 then, and by planet wheel 12 drive ring wheels 5, the feather keys that make ring wheel 5 pass through change gear 34 drive ptos 36 and rotate and outputting powers.Because automobile just starts or heavy duty is gone up a slope, the running resistance maximum of automobile, the rotational resistance that is reflected in simultaneously on the ring wheel 5 is also maximum, at this moment, wheel carrier 14,27 does not rotate under the effect of one- way clutch mechanism 13,14,25,26,37,38, and the mechanism that planet idle 19 and planet wheel 12 can only overcome the resistance rotation of resistance machine machine 9,10,11,16,17,18 and drive ring wheel 5 and rear portion thereof rotates and works.Minimum and the torsion maximum of the rotating speed of this moment ring wheel 5 and pto 36 is equivalent to the lowest speed of automobile.
When speed behind the start is accelerated gradually, the rotational resistance that is reflected in ring wheel 5 reduces gradually, at this moment planet idle 19 and planet wheel 12 are when speed of autorotation also slows down gradually under the drag effect of resistance mechanism 9,10,11,16,17,18 and accelerate with the revolution speed of wheel carrier 14,27, and the rotational velocity of ring wheel 5 and pto 36 thereof is also accelerated simultaneously.
With improving constantly of automobile forward velocity, the rotational resistance that is reflected on the ring wheel 5 further reduces, when this rotational resistance is reduced to a certain degree, the effect lower planet idle pulley 19 of resistance mechanism 9,10,11,16,17,18 and planet wheel 12 no longer from then only with wheel carrier 14,27 revolution and drive ring wheel 5 and pto 36 rotates and outputting powers.This moment, the ring wheel 5, and wheel carrier 14,27 central gears 23 are to rotate synchronously.The rotating speed of this moment output is the highest, and torsion be minimum, is equivalent to the high speed of automobile.
In advancing, automobile meets big resistance or upward slope, when running resistance is increased, the rotational resistance of ring wheel 5 also increases, and the peppery pawl 25 of one-way clutch mechanism can not reverse its pinning on the hook tooth 13 that snaps in front side frame 14 under the effect of click spring 37 timely at this moment.
When automobile need be moveed backward, the driver pushed away shift level forward, and is by reverse shift fork 32 that change gear 34 is sliding backward by neutral position, makes on the engaging-in reverse gear 2 of reverse gear tooth of change gear 34.At this moment, power is passed to change gear 34 by the reverse driving gear 30 of ring wheel 5 through reverse gear continuously-meshing gear 4 and reverse gear 2, pass to pto 36 by change gear 34 by the feather key on it again, make reversing and advance to have equal stepless automatic slewing range.
In sum, automobile is from can the steadily submissive stepless automatic variation speed of a motor vehicle between starting to walk the most at a high speed, the driver uses the speed of the Throttle Opening Control speed of a motor vehicle under steam, when increasing, running resistance can increase moment of torsion automatically, when running resistance reduces, can increase the speed of a motor vehicle automatically, make CVT (continuously variable transmission) remain the highest transmission efficiency.
Claims (2)
1, a kind of CVT (continuously variable transmission), it is mainly by central shaft (22), central gear (23), planet idle (19), planet wheel (12), resistance mechanism (9,10,11,16,17,18), wheel carrier (14,27), one-way clutch mechanism (13,14,25,26,37,38), ring wheel (5), reverse driving gear (30), forward gears toothholder (31), reverse gear continuously-meshing gear (4), reverse gear (2), change gear (34), pto (36), reverse shift fork (32), housing (38), cap and shift control are partly formed.It is characterized in that:
A, ring wheel (5) and wheel carrier (14,27), central gear (23) is on same axis.
B, be provided with the resistance mechanism (9,10,11,16,17,18) that can make planet Sui wheel (19) and the direct or indirect rotational resistance of planet wheel (12) generation.
C, be provided with the one-way clutch mechanism (13,14,25,26,37,38) that makes wheel carrier (14,27) rotate in the same way or not rotate with ring wheel (5) central gear (23).
2, according to 1 described it is characterized in that of claim, the present invention can be designed to some grades super CVT (continuously variable transmission).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94113783 CN1117123A (en) | 1994-11-01 | 1994-11-01 | Automatic stepless speed variator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94113783 CN1117123A (en) | 1994-11-01 | 1994-11-01 | Automatic stepless speed variator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1117123A true CN1117123A (en) | 1996-02-21 |
Family
ID=5036812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94113783 Pending CN1117123A (en) | 1994-11-01 | 1994-11-01 | Automatic stepless speed variator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1117123A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297136B (en) * | 2005-08-24 | 2012-10-10 | 福博科技术公司 | Continuously variable transmission |
-
1994
- 1994-11-01 CN CN 94113783 patent/CN1117123A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101297136B (en) * | 2005-08-24 | 2012-10-10 | 福博科技术公司 | Continuously variable transmission |
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