WO1984002964A1 - Tooth entrance for sliding pinions and fixed pinions - Google Patents

Tooth entrance for sliding pinions and fixed pinions Download PDF

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Publication number
WO1984002964A1
WO1984002964A1 PCT/FR1984/000012 FR8400012W WO8402964A1 WO 1984002964 A1 WO1984002964 A1 WO 1984002964A1 FR 8400012 W FR8400012 W FR 8400012W WO 8402964 A1 WO8402964 A1 WO 8402964A1
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WO
WIPO (PCT)
Prior art keywords
pinions
pinion
cones
axis
teeth
Prior art date
Application number
PCT/FR1984/000012
Other languages
French (fr)
Inventor
Remy Dousset
Original Assignee
Remy Dousset
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 Remy Dousset filed Critical Remy Dousset
Publication of WO1984002964A1 publication Critical patent/WO1984002964A1/en

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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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F16H55/0873—Profiling for improving axial engagement, e.g. a chamfer at the end of the tooth flank

Definitions

  • the present invention relates to the conjugate forms called "tooth entries" given to the teeth of fixed gears and sliding gears to facilitate their meshing.
  • the lateral faces of the teeth advantageously have suitable shapes so as to create, under the effect of the axial force of the sliding pinion, a tangential result which produces the necessary rotation.
  • These appropriate shapes of the side faces of the teeth are called “tooth inlets.”
  • teeth entries of various types and various types have been made. They can be classified into different genres:
  • Dhedrons the edge of which may be in the plane of the lateral face of the pinion or inclined relative to this plane.
  • Cylindrical or approximately conical shape whose generatrices are radial with respect to the pinion. Double domed, barrel-shaped.
  • the limits of the possibilities of these teeth inlets are easily determined by examining a schematic projection of the teeth inlets on a plane perpendicular to the axes of the pinions, as shown in FIG. 1: The examination of this projection shows in Indeed, as long as two median generators 10 and 10 'of the teeth inlets of one pinion cross two median generators 11 and 11' of the other pinion, there cannot be a gear.
  • the present invention relates to a new form of tooth entries, such that the possibility of gear is as perfect as possible, while obtaining, at the time of the gear, a contact between two generators and not only between two points. .
  • these teeth entries are defined by the following geometric construction: They have a conical shape, the axis of the cone not being radial with respect to the pinion (or even inclined with respect to the radial plane), but parallel to the axis of the pinion, the axes of the cones of said tooth inlets are found inside the pitch circle of each pinion, the distance between the axes of the cones of two adjacent teeth is identical for the two pinions, the angle at the top of the cones is the same for the two pinions, in addition, the radius of the circumference of the small face of the truncated cone is less than the offset of the axis of the cone relative to the original circle.
  • the contact, with the gear, is made according to a generator and not on a point of each tooth.
  • FIG. 1 schematically represents the projection of the median generatrices of the inputs of teeth previously known on a plane perpendicular to the axes of the pinions.
  • Figures 2a, 2b, 2c respectively show a perspective view, a front view and a side view of a tooth inlet according to the invention.
  • FIG. 3 shows, in radial section, the approach of two pinions provided with such teeth inlets, before the gear.
  • the tool determines, by a rotation of 180 °, a half-truncated cone towards the top of the tooth. The tool is then released towards the base of the tooth and thus connects the profile of the base of the tooth with the body of the pinion.
  • This execution can be carried out on machines of different types, either, for example, a milling machine to reproduce, or a specially designed machine, so that the conical cutter rotates around each tooth by 180 °.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

Tooth entrance for sliding pinions and fixed pinions defined by the following geometrical construction: the entrances have a conical shape, the axis of the cone (3) not being radial with respect to the pinion but parallel to the axis (1) of the pinion; the axes of the cones of said teeth entrances are within the primitive or pitch circle (2) of each pinion; the distance between the axes of the cones (3) of two adjacent teeth is identical for the two pinions; the apex angle of the cones is the same for both pinions; the radius (6) of the circumference of the small face of the cone frustum is smaller than the shift (7) of the cone axis with respect to the pitch circle.

Description

ENTREES DE DENTS POUR PIGNONS BALADEURS ET PIGNONS FIXES TEETH INPUTS FOR WHEEL SPROCKETS AND FIXED PINIONS
La présente invention concerne les formes conjuguées appelées "entrées de dents" données aux dents de pignons fixes et baladeurs pour faciliter leur engrenement.The present invention relates to the conjugate forms called "tooth entries" given to the teeth of fixed gears and sliding gears to facilitate their meshing.
Dans de nombreuses transmissions mécaniques à engrenages, deux pignons, l'un appelé pignon fixe, l'autre pignon baladeur, placés sur deux arbres parallèles sont engrenés et dégrenés par le déplacement axial du pignon baladeur.In many mechanical gear transmissions, two pinions, one called the fixed pinion, the other sliding pinion, placed on two parallel shafts are meshed and de-meshed by the axial movement of the sliding pinion.
Si les saillies des dents du pignon baladeur se présentent exactement en face des creux des dents du pignon fixe, l'engagement ou approche des deux pignons produira leur engrenement. Dans le cas contraire, il faudra une légère rotation de l'un ou de l'autre (ou des deux) pour permettre l'engrenement.If the protrusions of the sliding pinion teeth are exactly opposite the hollows of the fixed pinion teeth, the engagement or approach of the two pinions will produce their gear. Otherwise, it will take a slight rotation of one or the other (or both) to allow the gear.
Cette rotation peut être préalablement établie ou créée par la réaction des pignons : les faces latérales des dents ont avantageusement des formes appropriées de façon à créer, sous l'effet de la force axiale du pignon baladeur, une résultante tangentielle qui produit la rotation nécessaire. Ces formes appropriées des faces latérales des dents sont appelées "entrées de dents."This rotation can be previously established or created by the reaction of the pinions: the lateral faces of the teeth advantageously have suitable shapes so as to create, under the effect of the axial force of the sliding pinion, a tangential result which produces the necessary rotation. These appropriate shapes of the side faces of the teeth are called "tooth inlets."
On a réalisé, dans le passé, des entrées de dents de types multipies et variés. On peut les classer en différents genres :In the past, teeth entries of various types and various types have been made. They can be classified into different genres:
Dièdres, dont l'arête peut être dans le plan de la face latérale du pignon ou inclinée par rapport à ce plan. Forme cylindrique ou approximativement conique, dont les génératrices sont radiales par rapport au pignon. Double bombé, en forme de tonneau. Les limites des possibilités de ces entrées de dents sont facilement déterminées par l'examen d'une projection schématique des entrées de dents sur un plan perpendiculaire aux axes des pignons, telle que la représente la figure 1 : L'examen de cette projection montre en effet que tant que deux génératrices médianes 10 et 10' des entrées de dents d'un pignon croisent deux génératrices médianes 11 et 11' de l'autre pignon, il ne peut pas y avoir engrenement.Dhedrons, the edge of which may be in the plane of the lateral face of the pinion or inclined relative to this plane. Cylindrical or approximately conical shape, whose generatrices are radial with respect to the pinion. Double domed, barrel-shaped. The limits of the possibilities of these teeth inlets are easily determined by examining a schematic projection of the teeth inlets on a plane perpendicular to the axes of the pinions, as shown in FIG. 1: The examination of this projection shows in Indeed, as long as two median generators 10 and 10 'of the teeth inlets of one pinion cross two median generators 11 and 11' of the other pinion, there cannot be a gear.
La présente invention a pour objet une nouvelle forme d'entrées de dents, telle que la possibilité d'engrenement soit aussi parfaite que possible, tout en obtenant, au moment de l'engrenement, un contact entre deux génératrices et non seulement entre deux points.The present invention relates to a new form of tooth entries, such that the possibility of gear is as perfect as possible, while obtaining, at the time of the gear, a contact between two generators and not only between two points. .
Conformément à l'invention, ces entrées de dents sont définies par la construction géométrique suivante : Elles ont une forme conique, l'axe du cône n'étant pas radial par rapport au pignon (ou même incliné par rapport au plan radial), mais parallèle à l'axe du pignon, les axes des cônes des dites entrées de dents se trouvent à l'intérieur du cercle primitif de chaque pignon, la distance entre les axes des cônes de deux dents adjacentes est identique pour les deux pignons, l'angle au sommet des cônes est le même pour les deux pignons, de plus, le rayon de la circonférence de la petite face du tronc de cône est inférieur au décalage de l'axe du cδne par rapport au cercle primitif.In accordance with the invention, these teeth entries are defined by the following geometric construction: They have a conical shape, the axis of the cone not being radial with respect to the pinion (or even inclined with respect to the radial plane), but parallel to the axis of the pinion, the axes of the cones of said tooth inlets are found inside the pitch circle of each pinion, the distance between the axes of the cones of two adjacent teeth is identical for the two pinions, the angle at the top of the cones is the same for the two pinions, in addition, the radius of the circumference of the small face of the truncated cone is less than the offset of the axis of the cone relative to the original circle.
Cette construction géométrique confère à ces entrées de dents les propriétés suivantes :This geometric construction gives these teeth entries the following properties:
Le contact, à l'engrenement, se fait suivant une génératrice et non sur un point de chaque dent.The contact, with the gear, is made according to a generator and not on a point of each tooth.
Il ne peut pas y avoir croisement de génératrices. Les possibilités d'engrènement sont pratiquement parfaites. L'invention sera mieux comprise à l'aide de la description suivante d'un exemple de réalisation, en référence aux dessins annexés, dans lesquels :There cannot be a crossing of generators. The meshing possibilities are practically perfect. The invention will be better understood using the following description of an exemplary embodiment, with reference to the accompanying drawings, in which:
La figure 1 représente schématiquement la projection des génératrices médianes des entrées de dents précédemment connues sur un plan perpendiculaire aux axes des pignons.FIG. 1 schematically represents the projection of the median generatrices of the inputs of teeth previously known on a plane perpendicular to the axes of the pinions.
Les figures 2a, 2b, 2c représentent respectivement une vue en perspective, une vue de face et une vue de profil d'une entrée de dents conforme à l'invention.Figures 2a, 2b, 2c respectively show a perspective view, a front view and a side view of a tooth inlet according to the invention.
La figure 3 réprésente, en coupe radiale, l'approche de deux pignons munis de telles entrées de dents, avant l'engrenement.FIG. 3 shows, in radial section, the approach of two pinions provided with such teeth inlets, before the gear.
En se référant aux figures 2a, 2b, 2c et 3, on désigne par 1 et 1 ' l'axe des pignons, par 2 le cercle primitif, par 3 et 3' l'axe du cône de l'entrée de dents, par i. le pignon fixe et par 4' le pignon baladeur. Le sens du mouvement de celui-ci est indiqué par la flèche 5.Referring to Figures 2a, 2b, 2c and 3, denote by 1 and 1 'the pinion axis, by 2 the pitch circle, by 3 and 3' the axis of the cone of the entry of teeth, by i. the fixed pinion and by 4 'the sliding pinion. The direction of movement thereof is indicated by arrow 5.
On voit bien que les axes 3 et 3' sont parallèles aux axes 1 et 1' des pignons. On voit que, puisque les cônes des deux dents considérées ont à la fois leurs axes parallèles et le même angle au sommet, ils entrent en contact suivant une génératrice, à la seule condition, bien évidente, que les rayons 6 et 6' des petites faces des troncs de cônes soient inférieurs à la distance 7 ou 7' de l'axe du cône au cercle primitif.It is clear that the axes 3 and 3 'are parallel to the axes 1 and 1' of the pinions. We see that, since the cones of the two teeth considered have both their parallel axes and the same angle at the top, they come into contact along a generatrix, on the only condition, quite obvious, that the rays 6 and 6 'of the small faces of trunks of cones be less than the distance 7 or 7 'from the axis of the cone to the pitch circle.
En déterminant judicieusement pour chaque pignon la valeur du retrait 7 ou 7' radial de l'axe du cône par rapport au cercle primitif, on fait en sorte que la distance entre les axes des cônes de deux dents adjacentes soient identiques pour les deux pignons.By judiciously determining for each pinion the value of the radial shrinkage 7 or 7 ′ of the axis of the cone relative to the pitch circle, it is ensured that the distance between the axes of the cones of two adjacent teeth is identical for the two pinions.
Pour produire cette forme tronconique, il suffit que l'outil détermine, par une rotation de 180°, un demi-tronc de cône vers le sommet de la dent. L'outil se dégage ensuite vers le pied de la dent et effectue ainsi le raccord du profil de la base de la dent avec le corps du pignon.To produce this frustoconical shape, it suffices that the tool determines, by a rotation of 180 °, a half-truncated cone towards the top of the tooth. The tool is then released towards the base of the tooth and thus connects the profile of the base of the tooth with the body of the pinion.
Cette exécution peut être faite sur des machines de différents types, soit, par exemple, une fraiseuse à reproduire, soit une machine spécialement conçue, de sorte que la fraise conique effectue autour de chaque dent une rotation de 180°. This execution can be carried out on machines of different types, either, for example, a milling machine to reproduce, or a specially designed machine, so that the conical cutter rotates around each tooth by 180 °.

Claims

REVENDICATION. 1) Entrées de dents pour pignons baladeurs et pignons fixes, caractérisées par la construction géométrique suivante : elles ont une forme conique, l'axe du cβne (3) n'étant pas radial par rapport au pignon, mais parallèle à l'axe (1) du pignon j les axes des cônes des dites entrées de dents se trouvent à l'intérieur du cercle primitif (2) de chaque pignon ; la distance entre les axes des cônes (3) de deux dents adjacentes est identique pour les deux pignons ; l'angle au sommet des cônes est le même pour les deux pignons ; le rayon (6) de la circonférence de la petite face du tronc de cône est inférieur au décalage (7) de l'axe du cône par rapport au cercle primitif. CLAIM. 1) Inlets of teeth for sliding pinions and fixed pinions, characterized by the following geometric construction: they have a conical shape, the axis of the chain (3) not being radial with respect to the pinion, but parallel to the axis ( 1) of the pinion j the axes of the cones of said tooth inlets are located inside the pitch circle (2) of each pinion; the distance between the axes of the cones (3) of two adjacent teeth is identical for the two pinions; the angle at the top of the cones is the same for the two pinions; the radius (6) of the circumference of the small face of the truncated cone is less than the offset (7) of the axis of the cone relative to the pitch circle.
PCT/FR1984/000012 1983-01-19 1984-01-18 Tooth entrance for sliding pinions and fixed pinions WO1984002964A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8300972A FR2539478A1 (en) 1983-01-19 1983-01-19 TEETH INPUTS FOR SPROCKETS AND FIXED SPROCKETS

Publications (1)

Publication Number Publication Date
WO1984002964A1 true WO1984002964A1 (en) 1984-08-02

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PCT/FR1984/000012 WO1984002964A1 (en) 1983-01-19 1984-01-18 Tooth entrance for sliding pinions and fixed pinions

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EP (1) EP0132264A1 (en)
FR (1) FR2539478A1 (en)
WO (1) WO1984002964A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727770A (en) * 1986-02-24 1988-03-01 General Motors Corporation Planetary gear set and assembly method
EP0278533A2 (en) * 1984-09-20 1988-08-17 Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co Pairing of two coaxially arranged transmission elements each comprising gear-shift toothing
EP1045170A1 (en) * 1999-04-15 2000-10-18 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Sliding reverse gear arrangement for speed-changing gear
EP1045171A1 (en) * 1999-04-15 2000-10-18 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Sliding reverse gear arrangement for speed-changing gear

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001200898A (en) * 2000-01-17 2001-07-27 Denso Corp Planetary reduction gear

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR436608A (en) * 1911-11-21 1912-04-01 Marc Birkigt Improvements made to pinions for portable transmissions
FR519109A (en) * 1913-12-01 1921-06-04 Robert Decoux Meshing devices
US3367462A (en) * 1964-01-22 1968-02-06 William H. Bibbens Torque transmitter with yieldable teeth

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR436608A (en) * 1911-11-21 1912-04-01 Marc Birkigt Improvements made to pinions for portable transmissions
FR519109A (en) * 1913-12-01 1921-06-04 Robert Decoux Meshing devices
US3367462A (en) * 1964-01-22 1968-02-06 William H. Bibbens Torque transmitter with yieldable teeth

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278533A2 (en) * 1984-09-20 1988-08-17 Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co Pairing of two coaxially arranged transmission elements each comprising gear-shift toothing
EP0278533A3 (en) * 1984-09-20 1988-10-12 Carl Hurth Maschinen- Und Zahnradfabrik Gmbh & Co Toothed gear or similar work piece with roof-shaped parts for facilitating shifting
US4727770A (en) * 1986-02-24 1988-03-01 General Motors Corporation Planetary gear set and assembly method
EP1045170A1 (en) * 1999-04-15 2000-10-18 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Sliding reverse gear arrangement for speed-changing gear
EP1045171A1 (en) * 1999-04-15 2000-10-18 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Sliding reverse gear arrangement for speed-changing gear

Also Published As

Publication number Publication date
EP0132264A1 (en) 1985-01-30
FR2539478B1 (en) 1985-05-10
FR2539478A1 (en) 1984-07-20

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