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WO2008140285A1 - Transmission à réglage continu - Google Patents

Transmission à réglage continu Download PDF

Info

Publication number
WO2008140285A1
WO2008140285A1 PCT/MX2007/000059 MX2007000059W WO2008140285A1 WO 2008140285 A1 WO2008140285 A1 WO 2008140285A1 MX 2007000059 W MX2007000059 W MX 2007000059W WO 2008140285 A1 WO2008140285 A1 WO 2008140285A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation
planetary gears
planetary
output
input
Prior art date
Application number
PCT/MX2007/000059
Other languages
English (en)
Spanish (es)
Inventor
Carlos Alberto Brena Pinero
Original Assignee
Carlos Alberto Brena Pinero
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
Application filed by Carlos Alberto Brena Pinero filed Critical Carlos Alberto Brena Pinero
Priority to PCT/MX2007/000059 priority Critical patent/WO2008140285A1/fr
Publication of WO2008140285A1 publication Critical patent/WO2008140285A1/fr

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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/72—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously
    • F16H3/724—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously using externally powered electric machines

Definitions

  • the present invention relates to a continuously variable transmission (CVT), that is, a transmission with a torque and speed ratio between an input shaft and an output shaft, which can be varied. gradually.
  • CVT continuously variable transmission
  • This transmission can be used in both automotive vehicles and industrial machinery (lathes, milling machines, etc.), because the transmission of power is done through gears, which allows you to handle high touches on the input and output axes, as well as high revolutions per minute (RPM) if required.
  • RPM revolutions per minute
  • Lag continuously variable transmissions are used in cars, motorcycles and industrial machines, to which the description that follows will be referred, without restricting the object of application of the invention.
  • the objective of the present invention is to provide a continuously variable transmission, capable of transmitting high torques and high revolutions, occupying a reduced volume; counting on the possibility of being able to be regulated electronically, which allows it to meet the specific needs of operation, whether in its industrial or automotive application.
  • Another advantage of the present invention compared to known similar transmissions is that it uses a servomotor for lower power consumption for its operation, and that it requires less space.
  • Figure 1 It is a perspective view of the assembly of a preferred embodiment of the continuously variable force and speed transmission mechanism according to the present invention.
  • Figure 2 It is a perspective view of the separate parts of the preferred embodiment shown in Figure 1.
  • Figure 3 It is a diagram of the assembly of the preferred mode shown in Figures 1 and 2, delineating its location within a housing and showing indications for the electronic control of said modality.
  • Figure 1 shows a perspective view of the assembly of a preferred mode of the continuously variable force and speed transmission mechanism, in which the general arrangement of the mechanism is appreciated.
  • Said mechanism is characterized by two planetary gears (24,26) which have toothed on their perimeter surface, an intermediate planetary gear (25), two gears (17.21) that are geared to the perimeter surface of the planetary gears (24 , 26), two reversing gears (18,20), a servomotor (23), and a plurality of axes, among which the axis is identified input (1) and output shaft (16).
  • the rotation of the solar gear (2) is transmitted to the planetary gears (3) that are in its periphery.
  • the number of such planetary gears is indistinct, they can be one or several, although it is recommended that they be three or four to achieve an adequate distribution of the effort they make.
  • the planetary gears (3) are engaged with the inner teeth of the crown (4), which tends to rotate in favor of the tangential force that these planetary gears print.
  • Such a tendency of rotation of the crown (4) is in opposition to the force of the tendency of rotation of the crown (14), which prevents it from rotating freely. The cause of this opposition will be seen later.
  • the planetary plate (7) is part of the planetary gear (25) and transmits the turning force to the gears planetariums (8) ⁇ which in turn are engaged with the inner teeth of the crown (9), which is fixed to the housing (27);
  • This fastener is represented in Figures (2,3) by the symbol (31).
  • the planetariums (8) find a support in the inner teeth of the crown (9), they rotate the solar gear (10), which is attached or forms the same piece with the shaft (11), assembling at one of its ends .
  • the solar gear (12) is assembled at the other end of the shaft (11), to which the turning force is transmitted. It is recommended that the joint between the shaft (11) and the solar gear (12) be by means of grooves, to facilitate the assembly and disassembly of the mechanism.
  • the function of the planetary gear (25) is to perform a multiplication on the shaft (11) contrary to the reduction made on the shaft (6) by the planetary gear (24); so that if both planetary gears (24,25) are equal, when the crown (4) is not rotating, the speed and rotational force of the solar gear (12) will be the same as those of the solar gear (2). Likewise, the direction of rotation of the solar gear (12) will be the same as that of the input shaft (1).
  • the solar gear (12) is part of the planetary gear (26) and transmits its rotation to the planetary gears
  • the planetary gears (24,25,26) can be equal to each other or of different sizes but for explanation purposes, we will give as an example that all three are the same size. And if the first planetary gear (24) makes a reduction, for example, of 3: 1, the second planetary gear (25) would perform a multiplication of 1: 3 and the third planetary gear (26) would again make a reduction of 3: 1, so that the final gear ratio between the input shaft (1) and the output shaft (16) would be 3: 1, considering that the crown (9) is fixed to the housing (27) and that the crowns (4.14) do not rotate, due to the aforementioned turning reversing mechanism that works as follows:
  • the gear (17) receives the force of the tendency of rotation of the crown (4) and transmits it to the gear (18) by means of the shaft (19).
  • the gear (21) receives the force of the tendency of rotation of the crown (14) and transmits it to the gear (20) by means of the shaft (22).
  • the gears (18,20) are making contact, thus functioning as turning inverters and causing the forces of the rotation trends of the crowns (4.14) to nullify each other, being balanced. This balance allows the servomotor (23) that is assembled to the shaft (22), in that state, not to receive any force, no matter how high the torque that is transmitted between the input shaft (1) and the axis of output (16).
  • the gears (17,18,20,21) of the reversing mechanism of rotation can be the same or of different size and number of teeth. It is recommended that if the three planetary gears (24,25,26) are equal to each other, said gears (17,18,20,21) are also equal to each other.
  • the crowns (4.14) rotate in opposite directions, achieving a modification of the transmission ratio between the input shaft (1) and the output shaft (16).
  • the value of the transmission ratio between the axles (1.16) can be modified continuously by rotating the crowns (4.14) at the speed and in the direction desired by varying the rotation of the servomotor. (2. 3) .
  • the direction and speed of rotation of said servomotor can be regulated manually or automatically, preferably electronically, depending on the use of the mechanism.
  • Figure 3 is a diagram of the assembly of the preferred mode shown in Figures 1 and 2, delineating its location within a housing (27) and showing indications for electronic control of this mode.
  • This diagram indicates the power input by means of an arrow (35) on the shaft (1), it also indicates the power output, regulated in its torque and rotation speed on the shaft (16) by means of an arrow (36 ).
  • a lubricating fluid 28
  • the servomotor (23) can be located outside the housing, although this is not essential, since if it is an electric motor, which is recommended, this motor can operate inside the lubricating fluid, as long as that fluid is insulating electric.
  • the servomotor (23) can be automatically regulated by means of an electronic control unit (29) connected to it by means of electric cables (30).
  • sensors (31) for checking the internal work of the transmission such as parts rotation sensors, lubricating fluid temperature sensors, etc.
  • the signal from said sensors can be sent by means of electrical cables (32) to the electronic control unit (29).
  • the electronic control unit can also receive additional information, by means of electrical or electronic signals (33) which may vary depending on the application.
  • the signals may be the motor rotation speed and the orders given by the operator.
  • the signals may be engine revolutions per minute, vehicle speed, acceleration signal, etc.
  • Another very important advantage of this transmission mechanism is that the input and output axes can change their function interchangeably, depending on the application that is required. Understanding that when one is input, the other will be output. For example, if the axis (16) is used as input, a multiplication of the transmission ratio in the axis (1) will be obtained, which in this case will be the output.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

L'invention concerne une transmission à réglage continu (CVT) qui envoie la puissance d'un axe d'entrée à un axe de sortie, et dans laquelle la variation de couple et la vitesse de rotation de l'axe de sortie peuvent être réglés de manière automatique, permettant la rotation, au moyen d'un servomoteur (23) à commande électronique, des couronnes de deux engrenages planétaires (24,26) associés à un engrenage planétaire intermédiaire (25). Cette transmission peut être utilisée dans l'industrie et dans les véhicules automobiles et offre des prestations que d'autres transmissions semblables n'offrent pas.
PCT/MX2007/000059 2007-05-15 2007-05-15 Transmission à réglage continu WO2008140285A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/MX2007/000059 WO2008140285A1 (fr) 2007-05-15 2007-05-15 Transmission à réglage continu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/MX2007/000059 WO2008140285A1 (fr) 2007-05-15 2007-05-15 Transmission à réglage continu

Publications (1)

Publication Number Publication Date
WO2008140285A1 true WO2008140285A1 (fr) 2008-11-20

Family

ID=40002413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MX2007/000059 WO2008140285A1 (fr) 2007-05-15 2007-05-15 Transmission à réglage continu

Country Status (1)

Country Link
WO (1) WO2008140285A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402622A (en) * 1966-01-28 1968-09-24 Archanco Jose Luis Matut Automatic and controllable mechanical continuous transmission system
FR2404775A1 (fr) * 1977-10-03 1979-04-27 Combastet Michel Convertisseur de couple
US4327604A (en) * 1979-09-27 1982-05-04 Evans Rix E Continuously variable transmission
DE4205260C1 (en) * 1992-02-21 1993-04-08 Ulrich Von 4224 Huenxe De Mallinckrodt Continuously variable transmission drive - has input torque branched under set ratio and again brought together, one branch producing additional torque
US5800302A (en) * 1996-11-01 1998-09-01 Werre; Roger L. Planetary gear drive assembly
US6033332A (en) * 1998-04-09 2000-03-07 Evans; Shelby A. Continuously variable transmission
WO2005050041A2 (fr) * 2003-11-18 2005-06-02 Giora Ledereich Transmission variable en continu
WO2006064308A1 (fr) * 2004-12-17 2006-06-22 Carlos Alberto Brena Pinero Transmission a variation continue

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402622A (en) * 1966-01-28 1968-09-24 Archanco Jose Luis Matut Automatic and controllable mechanical continuous transmission system
FR2404775A1 (fr) * 1977-10-03 1979-04-27 Combastet Michel Convertisseur de couple
US4327604A (en) * 1979-09-27 1982-05-04 Evans Rix E Continuously variable transmission
DE4205260C1 (en) * 1992-02-21 1993-04-08 Ulrich Von 4224 Huenxe De Mallinckrodt Continuously variable transmission drive - has input torque branched under set ratio and again brought together, one branch producing additional torque
US5800302A (en) * 1996-11-01 1998-09-01 Werre; Roger L. Planetary gear drive assembly
US6033332A (en) * 1998-04-09 2000-03-07 Evans; Shelby A. Continuously variable transmission
WO2005050041A2 (fr) * 2003-11-18 2005-06-02 Giora Ledereich Transmission variable en continu
WO2006064308A1 (fr) * 2004-12-17 2006-06-22 Carlos Alberto Brena Pinero Transmission a variation continue

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