FR2611019A2 - Mechanism for converting the reciprocating movement of a piston into the circular movement of a shaft - Google Patents

Mechanism for converting the reciprocating movement of a piston into the circular movement of a shaft Download PDF

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Publication number
FR2611019A2
FR2611019A2 FR8701986A FR8701986A FR2611019A2 FR 2611019 A2 FR2611019 A2 FR 2611019A2 FR 8701986 A FR8701986 A FR 8701986A FR 8701986 A FR8701986 A FR 8701986A FR 2611019 A2 FR2611019 A2 FR 2611019A2
Authority
FR
France
Prior art keywords
piston
shaft
cam
output shaft
assembly
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.)
Pending
Application number
FR8701986A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 FR8512436A external-priority patent/FR2586280B1/en
Application filed by Individual filed Critical Individual
Priority to FR8701986A priority Critical patent/FR2611019A2/en
Publication of FR2611019A2 publication Critical patent/FR2611019A2/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/06—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft the piston motion being transmitted by curved surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/047—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft with rack and pinion
    • 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
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
    • F16H19/043—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack for converting reciprocating movement in a continuous rotary movement or vice versa, e.g. by opposite racks engaging intermittently for a part of the stroke

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The mechanism includes, according to the main patent, a set of two racks integral with pistons and alternately rotationally driving a toothed sector fixed onto the output shaft. Two cams are also mounted on the output shaft and have a groove with a specific profile with five successive zones which interact, at each end of travel of the piston, with rollers carried by the piston/rack assembly. According to the present addition, the central zone of the cam groove has a profile which is exactly concentric with the rotational axis of the output shaft. The device is particularly intended for suppressing ignition advance in heat engines.

Description

Le brevet. principal concerne un mécanisme permettant la transformation d'un mouvement alternatif obtenu sur un piston par la poussée d'un fluide en un mouvement rotatif récupérable sur un arbre, ou réciproquement. The patent. main relates to a mechanism allowing the transformation of an alternative movement obtained on a piston by the pushing of a fluid into a rotary movement recoverable on a shaft, or vice versa.

Ce mécanisme, particulièrement applicable aux moteurs thermiques, est constitué par deux crémaillères solidair s des pistons du moteur et qui engrènent alternativement avec un secteur denté calé sur l'arbre de sortie du moteur. This mechanism, particularly applicable to heat engines, is constituted by two racks secured to the pistons of the engine and which mesh alternately with a toothed sector wedged on the output shaft of the engine.

Selon une caractéristique essentielle du brevet principal, pour avoir une continuité d'entraînement entre l'ensemble pistons-crémaillères d'une part t l'arbre de sortie d'autre part, deux cames sont fixées sui l'arore de sortie en présentant chacune une gorge à profil particulier destinées à recevoir et guider des galets solidaires de l'ensemble pistons-orémaillères. Chaque gorge de-came se décompose en cinq zones successives dor.  According to an essential characteristic of the main patent, in order to have a drive continuity between the piston-rack assembly on the one hand t the output shaft on the other hand, two cams are fixed on the output gear, each having a groove with a particular profile intended to receive and guide rollers integral with the piston-and-pinion assembly. Each cam groove is divided into five successive gold zones.

les profils sont étudiés pour fournir
- un entraînement simultané de l'arbre par came
et crémaillère à une même vitesse V
- une décélération de l'ensemble crémaillères
pistons
- un arrêt de l'ensemble orémaillères-pistons ;
- une accélération de l'ensemble crémaillères
pistons en sens inverse
- un entraînement simultané par came t par
crémaillère à la même vitesse V.profiles are studied to provide
- simultaneous drive of the shaft by cam
and rack at the same speed V
- a deceleration of the rack and pinion assembly
pistons
- a stop of the rudder-piston assembly;
- acceleration of the rack and pinion assembly
pistons in reverse
- simultaneous drive by cam t by
rack at the same speed V.

Selon la présente addition, on prévait de realiser la zone centnale de la gorge de came avec @i.  According to the present addition, it was planned to make the central zone of the cam groove with @i.

prolil qui soit concentrique a l'axe de rotation de r'acbre de sortie, ce qui permet alors d'essurer dans ces conditions optimales l'arrêt de l'ersemple orêmaillères-pisions à chaque @in de course pour obceni@ ainsi un meilleur echappement, un meilleur remplissage pendant le @emp@ d'arret du piston en fin de course et la soppression de l'avance à l'allumage. prolil which is concentric to the axis of rotation of the output shaft, which then makes it possible to test in these optimal conditions the stopping of the example oremaillières-pisions at each race @in for obceni @ thus a better exhaust, better filling during the @ emp @ stop of the piston at the end of the stroke and the stopping of the ignition advance.

Claims (1)

REVENDICATION CLAIM Mécanisme de transformation d'un mouvement alternatif d'un piston en mouvement continu rotatif d'un arbre ou réciproquement, comportant deux crémaillères solidaires du piston et entraînant alternativement un secteur denté fixé sur cet arbre, deux cames étant également montées sur ledit arbre et guidant quatre galets fixés sur l'ensemble mobile crémaillères-piston et chaque came présentant une gorge de guidage des galets avec des zones successives dont le profil assure un entraînement simultanée par came et crémaillères à une même vitesse, une décélération de l'ensemble crémaillères-piston, un arrêt de cet ensemble, une accélération dudit ensemble en sens inverse et un entraînement simultané par came et crémaillères à la même vitesse selon la revendication 1 du brevet principal, caractérisé en ce que la zone centrale de la gorge de came présente un profil qui est exactement concentrique à l'axe de rotation de l'arbre de sortie.  Mechanism for transforming an alternating movement of a piston into a continuous rotary movement of a shaft or vice versa, comprising two racks secured to the piston and alternately driving a toothed sector fixed to this shaft, two cams also being mounted on said shaft and guiding four rollers fixed on the movable rack-piston assembly and each cam having a guide groove for the rollers with successive zones whose profile ensures simultaneous drive by cam and racks at the same speed, a deceleration of the rack-piston assembly , a stop of this assembly, an acceleration of said assembly in the opposite direction and a simultaneous drive by cam and racks at the same speed according to claim 1 of the main patent, characterized in that the central region of the cam groove has a profile which is exactly concentric with the axis of rotation of the output shaft.
FR8701986A 1985-08-13 1987-02-17 Mechanism for converting the reciprocating movement of a piston into the circular movement of a shaft Pending FR2611019A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8701986A FR2611019A2 (en) 1985-08-13 1987-02-17 Mechanism for converting the reciprocating movement of a piston into the circular movement of a shaft

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8512436A FR2586280B1 (en) 1985-08-13 1985-08-13 MECHANISM FOR TRANSFORMING THE ALTERNATIVE MOTION OF A PISTON INTO A CIRCULAR MOTION OF A SHAFT
FR8701986A FR2611019A2 (en) 1985-08-13 1987-02-17 Mechanism for converting the reciprocating movement of a piston into the circular movement of a shaft

Publications (1)

Publication Number Publication Date
FR2611019A2 true FR2611019A2 (en) 1988-08-19

Family

ID=26224683

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8701986A Pending FR2611019A2 (en) 1985-08-13 1987-02-17 Mechanism for converting the reciprocating movement of a piston into the circular movement of a shaft

Country Status (1)

Country Link
FR (1) FR2611019A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR612997A (en) * 1926-02-02 1926-11-05 Advanced device for transforming reciprocating motion into circular motion and vice versa
FR33075E (en) * 1927-03-03 1928-06-12 Rack and pinion device for increasing the efficiency of piston engines, pumps and the like
FR2093119A5 (en) * 1970-06-03 1972-01-28 Fuster Antoine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR612997A (en) * 1926-02-02 1926-11-05 Advanced device for transforming reciprocating motion into circular motion and vice versa
FR33075E (en) * 1927-03-03 1928-06-12 Rack and pinion device for increasing the efficiency of piston engines, pumps and the like
FR2093119A5 (en) * 1970-06-03 1972-01-28 Fuster Antoine

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