WO1989007724A1 - Transmission a reglage continu - Google Patents

Transmission a reglage continu Download PDF

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Publication number
WO1989007724A1
WO1989007724A1 PCT/HU1989/000005 HU8900005W WO8907724A1 WO 1989007724 A1 WO1989007724 A1 WO 1989007724A1 HU 8900005 W HU8900005 W HU 8900005W WO 8907724 A1 WO8907724 A1 WO 8907724A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
pulley
belt
gear
infinitely variable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/HU1989/000005
Other languages
English (en)
Inventor
Sándor AMBRUS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Innofinance Altalanos Innovacios Penzintezet
Original Assignee
Innofinance Altalanos Innovacios Penzintezet
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from HU68388A external-priority patent/HUT49678A/hu
Priority claimed from HU408388A external-priority patent/HUT50943A/hu
Application filed by Innofinance Altalanos Innovacios Penzintezet filed Critical Innofinance Altalanos Innovacios Penzintezet
Publication of WO1989007724A1 publication Critical patent/WO1989007724A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members
    • F16H9/125—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members characterised by means for controlling the geometrical interrelationship of pulleys and the endless flexible member, e.g. belt alignment or position of the resulting axial pulley force in the plane perpendicular to the pulley axis
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/04—V-belts, i.e. belts of tapered cross-section made of rubber
    • F16G5/06—V-belts, i.e. belts of tapered cross-section made of rubber with reinforcement bonded by the rubber
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • 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
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
    • F16H9/12—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley built-up out of relatively axially-adjustable parts in which the belt engages the opposite flanges of the pulley directly without interposed belt-supporting members

Definitions

  • the invention relates to an infinitely variable gear with which the belt pulleys arranged on the driving shaft and on the driven shaft carrying the all around running V-belt consists of the half-pulley each fixed rigidly onto the shaft and of the pulley-half which can be displaced axially in respect to the fixed pulley-half each.
  • the task of the invention is to develop an infinitely variable gear as previously described, with an inconsiderable space requirement and weight, not tending to failure, production costs should be relatively low; a further requirement lies in that in course of operation slips must not arise between the belt pulley-halves and the side-walls of the belt which could lead to warming up of the belt, change of the elastic characteristics and dimensions respectively accordingly, useful life can be significantly prolonged and transmission does not change even after using the belt for a long time.
  • the task was solved by developing an infinitely variable gear with which the belt pulleys arranged on the driving shaft and on the driven shaft carrying the all around running V-belt consist of the half-pulley each fixed rigidly onto the shaft and of the pulley-half which can be displaced axially in respect to the fixed pulley-half each and which can be characterized in that as a reinforcing insert a V-belt is used which is reinforced with cord fibres and embedded into the elastic material along the cone mantle, enclosed by the sides of the belt pulley-halves facing each other and formed with different halved cone angles.
  • a further characteristic of the invention lies in that out of the driving shaft and the driven shaft at least on one of them, the axially movable belt pulley-half is connected via a half screw-thread, to the shaft, and between the other belt pulley-half on the shaft and the shaft there is a free-running structural part.
  • a further characteristic lies in that between the belt pulley-half displaceable longitudinally on one of the shafts, and the shaft there is a compression spring attached, removing the displaceable belt pulley-half from the pulley-half kept indisplaceably on the shaft, furtheron, on the other shaft there is another spring spanning the movable pulley-half towards the indisplaceable pulley-half.
  • the gear according to the indention can be advantageously rised in cases too, in which a plurality of gear units is assembled with different known structural parts.
  • the gear according to the invention is proved with a first gear unit having been arranged between the motor and the clut ⁇ h, formed with belt pulleys arranged on the motor shaft and on the countershaft being parallel therewith, converting the changing moment into a constant moment, furtheron, if it is provided with a second gear formed with belt pulleys arranged on the countershaft of the first gear and on the output shaft being parallel therewith, wherein prevailing transmission is set by the changing loading moment on the output shaft.
  • a solution is also possible, with which the gear is assembled of a first gear unit connected to the countershaft and two second gear units.
  • a reverse and differential gear- comprising also the final transmission - is inserted into the shaft after the clutch.
  • a further characteristic lies in that the wheels of the driven wheel-pairs of the driven motor vehicle are separated and on the inner end of the shaft-halves belonging to the wheels there is a reverse gear containing also the final transmission and every one is connected through a belt drive each or any other similar means to the driving belt pulley of the clutch belonging to a second gear unit e.ach, having been fixed onto the shaft facing the reverse gear.
  • Figure 1 is the schematical cross-section of a traditional V-belt
  • Figure 2 the sectional view of the V-belt applied in the gear according to the invention
  • Figure 3 illustrates the V-belt applied in the gear according to the invention, positioned between the belt pulley-halves,
  • Figure 4 is a sectional partial view of one of the embodiments of the gear according to the invention.
  • Figure 5 is a partial sectional view along the line V-V of figure 4,
  • Figure 6 is the schematical view of the combination of the infinitely variable gear according to the invention which is suitable for the simultaneous and unidirectional drive of two driven wheels of a motor vehicle
  • Figure 7 shows the theoretical scheme of a combined embodiment which is able to drive two wheels of a motor vehicle simultaneously, unidirectionally, or simultaneously and in different directions, or to drive only one wheel of the vehicle simultaneously, in any optional direction.
  • Figure 1 illustrates the sectional view of a V-belt 1, which has the usual structural layout.
  • the cord fibres 2 forming the reinforcing insert are embedded into the V-belt 1 made of rubber or some synthetic material, said fibres are arranged in the cylinder mantle formed, around the imaginary axis of the V-belt 1, that means that the diameters measurable in the adjacent planes being perpendicular to the imaginary axis are identical.
  • the V-belt 3 applied in the gear according to the invention illustrated in figure 2 conforms to the external appearance of the V-belt 1.
  • Two outer sides of the V-belt 3 are symmetrical in relation to the medium plane and half-cone angles ⁇ are also identical and equal on both sides of the medium plane.
  • the V-belt 3 differs in so far from the V-belt 1 that - as it becomes obvious from the section - the adjacent cord fibres 4 are not arranged along the cylinder mantle but along the cone mantle.
  • Out of the cord fibres 4 forming the reinforcing insert the inner diameter D B and the outer diameter D K of the two extreme fibres are different.
  • the V-belt 3 is to be seen in the stretched state between two belt pulleys, as contained in the gear.
  • the driving belt pulley consists of the pulley-halves 5 and 6, while the other, the driven belt pulley is assembled of the pulley-halves 7 and 8.
  • the cord fibres 4 are arranged in provisional positions between the lower and the upper extreme position, said positions are continuously changing in course of revolution of the V-belt 3 in the single tracts of the V-belt. This change is enabled by the slight deformation of the V-belt during the rotary motion.
  • the reason of the orientation of the cord fibres 4 in the V-belt 3 lies in that the inner half-cone angles of the pulley-halves 5, 6, 7 and 8 are different. Magnitude of the half-cone angles ⁇ 5, ⁇ 6 , ⁇ 7 , ⁇ 8 depends essentially on the half-cone angles ⁇ to be measured in the condition prior to arranging the V-belt 3, as well as on the cone angle of the cord, fibres 4 according to figure 2, resp. on the value D K - D B . With the arrangement according to figure 3 radii R 5 and R 6 of the cord fibres 4 are equal, while the radii R 7 resp.
  • R 8 of the two extreme cord fibres 4 are the radii of the cord fibres being practically in contact with the upper driven belt pulley-halves 7 and 8; from these we obtain that D K D B ⁇ R 7 - R 8 ⁇ ⁇ R From all what has been said it becomes obvioxis that at the arrangement according to figure 3 the cross-section of the V-beit 3 remains practically the same at the bottom and the top of the figure, as in figure 2, substantially the sides of the V-belt 3 are lying regularly in the grooves between the driving belt pulley-halves and. the driven pulley-halves 7 and 8.
  • groove-sides of the belt pulley-halves, 5, 6, 7 and 8 will always lie to the sides of the V-belt 3 and they will rotate next to each other practically without any slips.
  • the driving moment arrives to the driving shaft 10 as shown by the arrow 9.
  • the shaft 10 and the belt-pulley-half 5 having been fixed thereto in a way known in itself are supported by the rolling bearing 12 in the house 11 in a rotatably way.
  • the belt pulley-half 5 is unable to move along the shaft 10, it co-rotates with the shaft 10. From the pulley-half 5 inwards the shaft 10 is formed as a part of the finned shaft 13 on which the belt pulley-half 6 can be displaced axially. On the outer endface of the finned shaft 13 the end-disc 14 is fixed in any known way.
  • the spring 16 - made of a tubular rubber body or a steel wire-spiral - is intercepted which spans the pulley-half 6 continuously towards the belt pulley-half 5.
  • the pulley-half 7 Via the shouldered rolling bearing 18 and the free-running structural part 19 the pulley-half 7 is fixed onto the driven shaft 17. In. the closing state of the free-running structural part 19 the belt pulley-half 7 co-rotates with the shaft 17, while in the open state of the free-running structural part 19 it is able to turn in relation to the shaft 17. The belt pulley-half 7 cannot be displaced, however, longitudinally on the shaft 17.
  • the belt pulley-half 8 may turn on the shaft 17 and in dependence of the direction of turn it may approach to or leave from the pulley-half 7.
  • the sleeve 21 is fixed rigidly to the outer side of the belt pulley-half 8, on the outer end-part there is the female-thread 22 to be found.
  • the thread on the outer surface of the sleeve-part of the carrier disc 23 engages with the female-thread 22.
  • the sleeve 24 is fixed rigidly onto the left-side end of the shaft 17 with a screw, the inner end of said sleeve carries the supporting ring 25 fixed rigidly thereto.
  • the cushion ring 26 is fixed rigidly to the inner side of the supporting ring 25, around the screw-thread 20.
  • each - made of steel or teflon and formed with a smooth surface - is arranged, these enclose the spring 28 made of a tubular rubber material or steel spiral.
  • the sleeve 24 , the supporting ring 25 and the cushion ring 26 co-rotate with the shaft 17, while the sleeve 21 and the carrier disc 23 co-rotate with the belt pulley-half 8.
  • Slide rings 27 and the spring 28 may co-rotate with any of them.
  • the belt pulley-half co-rotates with an identical number of revolutions with the shaft 17, its position does not change in the longitudinal direction of the shaft 17, furtheron, the belt pulley-half is also co-rotating with the pulley-half 8, as the free-running structural part 19 occupies its open position.
  • the V-belt 3 When the pulley-halves 7 and 8 are approaching to each other, the V-belt 3 is sliding radially outwards, as a consequence, the force arm of the moment having been transferred by the V-belt to the belt pulley-halves 7 and 8 and therethrough to the shaft 17 and simultaneously the moment itself increase. If the increase in moment thus achieved does not siiffice for transmitting the moment required on the shaft 17, the V-belt 3 turns the pulley-half 3 as long on the shaft 17, as the V-belt 3 arrives at the position with the radius needed for the transfer of the desired moment.
  • the spring 28 influences both sensitivity and response time of the gear, pre-stress thereof can be regulated by means of the sleeve 21 and the screw-thread of the supporting disc 23.
  • Response time will be defined mainly by the shape and arrangement of the reinforcing insert consisting of the cord fibres 4, as well as by the half-cone angle of the belt pulley-halves 5, 6, 7 and 8. Deviations from the usual values do not exceed unconditionally the permissible deviations of the neutral length of the known standarised V-belts, i.e. the values of the tolerance range allowed for the angular deviation of standarized belt-pulleys.
  • FIGS 6 and 7 give two examples for the application of the gear according to the invention.
  • one of the belt pulleys of the first gear unit 31 according to figure 4 converting the changing moment into a constant moment is fixed onto the shaft 30 of the gasoline engine 29 delivering the changing moment.
  • the other belt pxtlley of the first gear unit 31 is fixed onto the countershaft 32 running parallel with the shaft 30, as a consequence, the first gear unit 31 drives the countershaft 32 with a constant moment.
  • a further belt pulley is fixed onto the countershaft 32, said, pulley represents one of the belt-pulleys of a second gear unit 33 converting the constant moment prevailing on the countershaft 32 into changing moment.
  • the other belt pulley of the second gear unit 33 is fixed onto the output shaft 34, while on said, output shaft 34 in course of the operation and run of the motor vehicle moments corresponding to prevailing demands and required for advance will arise.
  • the moment delivered always by the motor 29 yielding the changing moment the first gear unit 31 converts it into a constant moment on the countershaft 32, while this constant moment is converted by the second gear unit 33 into a changing moment, which is in compliance with the prevailing required moment arising on the output shaft 34.
  • the previously specified structural arrangement can be used directly for driving single-wheel vehicles, so e.g. motorcycles having one wheel and similar vehicles. If we intend to drive vehicles with two-wheel drive, e.g. passanger cars or other motor vehicles, expediently a reverse gear 39 and a differential gear 40 can be built-in between the common shaft 37 of the clutch 35 and the two driven wheels 36.
  • a reverse gear 39 and a differential gear 40 can be built-in between the common shaft 37 of the clutch 35 and the two driven wheels 36.
  • the essential difference lies in that with the structural construction according to figure 1 both driven wheels 36 are always driven simultaneously and always in the same direction, while with the other structural solution according to figure 2 the two wheels 36 are separated in respect to drive, they can be driven simultaneously in the same direction and in opposite directions too, however, it becomes possible to drive one single wheel 36 only.
  • the countershaft 32 is connected to a first gear unit 31 and two second gear rinits 33.
  • gear unit 34 On the output shaft 34 of every second, gear unit 34 there are a clutch 35 each and a belt-pulley or a toothed wheel belonging thereto, which are forming a part of a belt-drive 41 each resp. or a gear drive.
  • the shaft of the driven wheels 36 is separated in two, consequently, the weels 36 can be rotated independently of each other.
  • At the inner end of the shaft-halves 38 of the single wheels 36 there is a second belt-pulley belonging to the belt-drive 41 arranged, resp. there is a second toothed wheel belonging to the gear drive, which can be assembled with the reverse gear 39 containing also the final transmission.
  • Gear shifting "reverse” and “changing up” are intertwined, practically they occur simultaneously, resulting in energy savings and proper acceleration.
  • Motor vehicle is turning on a smaller circle, than motor vehicles operated with the known gears. Wheels of the driving wheel-pair can be rotated independently of each other, as a consequence, the car can be driven even in this case, if only one of the driving wheels contacts the soil. Shaft coupling can be performed without jerks, decreasing the stress on several components of the motor vehicle, simultaneously comfort of travel in the car increases.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

Dans la transmission décrite, les poulies à courroie agencées sur l'arbre menant et sur l'arbre mené portant la courroie trapézoïdale tournant tout autour consistent en la demi-poulie fixée rigidement sur l'arbre et en la demi-poulie se déplaçant axialement par rapport à la demi-poulie fixe. La caractéristique essentielle de cette transmission à réglage continu réside dans le fait que la courroie trapézoïdale (3) est formée de fibres de câblés (4) faisant office d'armature noyée dans le matériau élastique de la courroie le long de l'enveloppe conique, entourée par les faces des demi-poulies (5, 6, 7, 8) situées en regard l'une de l'autre et formées d'angles de demi-cône différents (alpha5, alpha6, alpha7, alpha8).
PCT/HU1989/000005 1988-02-12 1989-02-10 Transmission a reglage continu Ceased WO1989007724A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
HU68388A HUT49678A (en) 1988-02-12 1988-02-12 Stepless drive
HU683/88 1988-02-12
HU4083/88 1988-08-04
HU408388A HUT50943A (en) 1988-08-04 1988-08-04 Stepless drive for motor vehicles

Publications (1)

Publication Number Publication Date
WO1989007724A1 true WO1989007724A1 (fr) 1989-08-24

Family

ID=26317251

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU1989/000005 Ceased WO1989007724A1 (fr) 1988-02-12 1989-02-10 Transmission a reglage continu

Country Status (2)

Country Link
AU (1) AU3052689A (fr)
WO (1) WO1989007724A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7037225B2 (en) * 2002-07-25 2006-05-02 Kawasaki Jukogyo Kabushiki Kaisha Automatic V-belt transmission
CN108834682A (zh) * 2018-07-07 2018-11-20 周雨馨 无级自动变速卷帘机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623377A (en) * 1970-05-06 1971-11-30 Dayco Corp Asymmetric variable speed drive
DE2647076A1 (de) * 1976-10-19 1978-04-20 Georges Prof Hoffmann Servodynamische folgesteuerung fuer stufenlose getriebe
EP0083501A2 (fr) * 1981-12-30 1983-07-13 The Gates Rubber Company Système et méthode pour un variateur de vitesse à courroie
US4568315A (en) * 1983-02-18 1986-02-04 Mitsuboshi Belting Ltd. Speed-shifting pulley with clutch mechanism
DE3623116A1 (de) * 1985-07-10 1987-01-15 Aisin Warner Kontinuierlich veraenderbare keilriementransmission
WO1987007349A1 (fr) * 1986-05-24 1987-12-03 Tokyo Jido Kiko Kabushiki Kaisha Poulie a vitesse variable

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623377A (en) * 1970-05-06 1971-11-30 Dayco Corp Asymmetric variable speed drive
DE2647076A1 (de) * 1976-10-19 1978-04-20 Georges Prof Hoffmann Servodynamische folgesteuerung fuer stufenlose getriebe
EP0083501A2 (fr) * 1981-12-30 1983-07-13 The Gates Rubber Company Système et méthode pour un variateur de vitesse à courroie
US4568315A (en) * 1983-02-18 1986-02-04 Mitsuboshi Belting Ltd. Speed-shifting pulley with clutch mechanism
DE3623116A1 (de) * 1985-07-10 1987-01-15 Aisin Warner Kontinuierlich veraenderbare keilriementransmission
WO1987007349A1 (fr) * 1986-05-24 1987-12-03 Tokyo Jido Kiko Kabushiki Kaisha Poulie a vitesse variable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7037225B2 (en) * 2002-07-25 2006-05-02 Kawasaki Jukogyo Kabushiki Kaisha Automatic V-belt transmission
CN108834682A (zh) * 2018-07-07 2018-11-20 周雨馨 无级自动变速卷帘机

Also Published As

Publication number Publication date
AU3052689A (en) 1989-09-06

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